/* roulang page: index */
:root {
            --color-primary: #D4FF00;
            --color-primary-hover: #BFE600;
            --color-primary-soft: rgba(212, 255, 0, 0.12);
            --color-secondary: #1A1A1A;
            --color-secondary-light: #2A2A2A;
            --color-secondary-mid: #3A3A3A;
            --color-bg: #FAFAF7;
            --color-bg-alt: #F0F0EA;
            --color-bg-card: #FFFFFF;
            --color-text: #1A1A1A;
            --color-text-inverse: #FAFAF7;
            --color-text-muted: #666666;
            --color-text-faint: #999999;
            --color-border: #E5E5E0;
            --color-border-strong: #D0D0C8;
            --color-accent: #FF3B30;
            --color-accent-soft: rgba(255, 59, 48, 0.10);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 10px;
            --radius-xl: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-mid: 200ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", "Menlo", "Consolas", "PingFang SC", monospace;
            --header-height: 68px;
            --sidebar-width: 272px;
            --container-max: 1280px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 0.95rem;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
        a:hover { color: var(--color-primary-hover); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        :focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
        .visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }

        /* ========== HEADER ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: var(--color-secondary);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            border-bottom: 2px solid var(--color-primary);
        }
        .header-left { display: flex; align-items: center; gap: 16px; }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--color-text-inverse);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-size: 1.1rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .header-search {
            flex: 1;
            max-width: 480px;
            margin: 0 24px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            height: 40px;
            padding: 0 40px 0 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.9rem;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
        }
        .header-search input::placeholder { color: rgba(255, 255, 255, 0.5); }
        .header-search input:focus {
            outline: none;
            border-color: var(--color-primary);
            background-color: rgba(255, 255, 255, 0.12);
        }
        .header-search .search-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .header-controls { display: flex; align-items: center; gap: 12px; }
        .header-controls select {
            height: 40px;
            padding: 0 28px 0 12px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            transition: border-color var(--transition-fast);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23FAFAF7' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
        }
        .header-controls select:focus { border-color: var(--color-primary); outline: none; }
        .header-controls select option { background-color: var(--color-secondary); color: var(--color-text-inverse); }
        .hamburger-btn {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--color-text-inverse);
            font-size: 1.4rem;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast);
        }
        .hamburger-btn:hover { background-color: rgba(255, 255, 255, 0.1); }
        .mobile-search-btn {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--color-text-inverse);
            font-size: 1.2rem;
            border-radius: var(--radius-sm);
        }

        /* ========== SIDEBAR ========== */
        .layout-wrapper {
            display: flex;
            padding-top: var(--header-height);
            min-height: 100vh;
        }
        .sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--color-bg-card);
            border-right: 1px solid var(--color-border);
            padding: 24px 16px;
            overflow-y: auto;
            z-index: 900;
            transition: transform var(--transition-mid);
        }
        .sidebar-title {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--color-text-faint);
            padding: 0 12px 12px;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 12px;
        }
        .sidebar-nav { list-style: none; }
        .sidebar-nav li { margin-bottom: 2px; }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            position: relative;
        }
        .sidebar-nav a:hover { background-color: var(--color-bg-alt); color: var(--color-text); }
        .sidebar-nav a.active {
            background-color: var(--color-primary-soft);
            color: var(--color-text);
            font-weight: 700;
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            border-radius: 2px;
            background-color: var(--color-primary-hover);
        }
        .sidebar-nav .nav-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 22px;
            height: 22px;
            font-size: 0.75rem;
            font-weight: 800;
            color: var(--color-text-faint);
            flex-shrink: 0;
        }
        .sidebar-nav a.active .nav-icon { color: var(--color-secondary); }
        .sidebar-footer-note {
            margin-top: 24px;
            padding: 16px 12px;
            border-top: 1px solid var(--color-border);
            font-size: 0.78rem;
            color: var(--color-text-faint);
            line-height: 1.6;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 850;
            opacity: 0;
            transition: opacity var(--transition-mid);
        }
        .sidebar-overlay.visible { opacity: 1; }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-width: 0;
            padding: 0;
        }
        .page-section {
            padding: 56px 32px;
        }
        .page-section:nth-child(even) { background-color: var(--color-bg-alt); }
        .page-section:nth-child(odd) { background-color: var(--color-bg); }
        .section-header {
            margin-bottom: 32px;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-text-faint);
            background-color: var(--color-bg-alt);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--color-text);
        }
        .section-desc {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            max-width: 680px;
            margin-top: 8px;
            line-height: 1.75;
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            min-height: 44px;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: var(--color-secondary);
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-outline {
            background-color: transparent;
            border: 1px solid var(--color-border-strong);
            color: var(--color-text);
        }
        .btn-outline:hover {
            border-color: var(--color-primary-hover);
            color: var(--color-secondary);
            background-color: var(--color-primary-soft);
        }
        .btn-dark {
            background-color: var(--color-secondary);
            color: var(--color-text-inverse);
        }
        .btn-dark:hover {
            background-color: var(--color-secondary-light);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background-color: var(--color-accent);
            color: #FFFFFF;
        }
        .btn-accent:hover {
            background-color: #E03028;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.82rem;
            min-height: 36px;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 16px 32px;
            font-size: 1rem;
            min-height: 52px;
            border-radius: var(--radius-md);
        }

        /* ========== HERO SECTION ========== */
        .hero-section {
            padding: 0;
            background-color: var(--color-secondary);
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.92) 0%, rgba(26, 26, 26, 0.7) 50%, rgba(26, 26, 26, 0.85) 100%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            padding: 72px 32px;
            width: 100%;
            max-width: 1100px;
        }
        .hero-question {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .hero-title {
            font-size: 2.9rem;
            font-weight: 900;
            line-height: 1.15;
            color: var(--color-text-inverse);
            letter-spacing: -0.03em;
            max-width: 720px;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            color: var(--color-primary);
        }
        .hero-desc {
            font-size: 1.05rem;
            line-height: 1.8;
            color: rgba(250, 250, 247, 0.75);
            max-width: 640px;
            margin-bottom: 32px;
        }
        .hero-form-wrap {
            background-color: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 24px;
            max-width: 560px;
        }
        .hero-form-wrap .form-label {
            display: block;
            font-size: 0.82rem;
            font-weight: 600;
            color: rgba(250, 250, 247, 0.8);
            margin-bottom: 6px;
        }
        .hero-form-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .hero-form-row select,
        .hero-form-row input {
            flex: 1;
            min-width: 140px;
            height: 46px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--color-text-inverse);
            font-size: 0.88rem;
            appearance: none;
            -webkit-appearance: none;
            transition: border-color var(--transition-fast);
        }
        .hero-form-row select:focus,
        .hero-form-row input:focus { outline: none; border-color: var(--color-primary); }
        .hero-form-row select option { background-color: var(--color-secondary); color: var(--color-text-inverse); }
        .hero-form-row input::placeholder { color: rgba(255, 255, 255, 0.5); }
        .hero-form-hint {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 10px;
        }

        /* ========== METRIC CARDS ========== */
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .metric-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition-fast);
        }
        .metric-card:hover {
            border-color: var(--color-primary-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .metric-label {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--color-text-faint);
            letter-spacing: 0.06em;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .metric-label .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--color-primary-hover);
            display: inline-block;
        }
        .metric-number {
            font-size: 2.5rem;
            font-weight: 900;
            line-height: 1.1;
            font-family: var(--font-mono);
            letter-spacing: -0.02em;
            color: var(--color-text);
        }
        .metric-unit {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-text-faint);
            margin-left: 4px;
        }
        .metric-trend {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-text-muted);
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .metric-trend .up { color: var(--color-primary-hover); font-weight: 800; }
        .metric-trend .neutral { color: var(--color-text-faint); }

        /* ========== SERVICE CARDS ========== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .service-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .service-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--color-primary-hover);
            transition: width var(--transition-mid);
        }
        .service-card:hover::after { width: 100%; }
        .service-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-primary-hover);
        }
        .service-icon {
            font-size: 1.6rem;
            font-weight: 900;
            color: var(--color-secondary);
            background-color: var(--color-primary-soft);
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
        }
        .service-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .service-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .comparison-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
        }
        .comparison-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-card .comparison-badge {
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 4px;
            background-color: var(--color-bg-alt);
            color: var(--color-text-muted);
        }
        .comparison-card .comparison-badge.highlight-badge {
            background-color: var(--color-primary-soft);
            color: var(--color-secondary);
        }
        .comparison-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 0.88rem;
        }
        .comparison-row:last-child { border-bottom: none; }
        .comparison-row .row-label { color: var(--color-text-muted); }
        .comparison-row .row-value { font-weight: 700; }
        .comparison-row .row-value.positive { color: var(--color-accent); }
        .comparison-row .row-value.neutral { color: var(--color-text-faint); }

        /* ========== TIMELINE ========== */
        .timeline {
            display: flex;
            gap: 0;
            position: relative;
            padding: 20px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .timeline-item {
            flex: 1;
            min-width: 160px;
            text-align: center;
            position: relative;
            padding: 0 12px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            top: 14px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-border-strong);
            z-index: 0;
        }
        .timeline-item:first-child::before { left: 50%; }
        .timeline-item:last-child::before { right: 50%; }
        .timeline-dot {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--color-bg-card);
            border: 3px solid var(--color-primary-hover);
            margin: 0 auto 12px;
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.65rem;
            color: var(--color-secondary);
        }
        .timeline-year {
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--color-text);
            margin-bottom: 4px;
            font-family: var(--font-mono);
        }
        .timeline-desc {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            max-width: 180px;
            margin: 0 auto;
        }

        /* ========== BRAND INTRO ========== */
        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 48px;
            align-items: start;
        }
        .brand-intro-left h2 {
            font-size: 1.5rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-text);
        }
        .brand-intro-left .brand-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--color-secondary);
            background-color: var(--color-primary-soft);
            padding: 4px 12px;
            border-radius: 20px;
            margin-top: 12px;
        }
        .brand-intro-right p {
            font-size: 0.95rem;
            line-height: 1.85;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }
        .brand-intro-right p:last-child { margin-bottom: 0; }

        /* ========== NEWS LIST ========== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-primary-hover);
        }
        .news-card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .news-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-date {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--color-text-faint);
            font-family: var(--font-mono);
            margin-bottom: 8px;
        }
        .news-card-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 4px;
            background-color: var(--color-bg-alt);
            color: var(--color-text-muted);
            margin-bottom: 8px;
            align-self: flex-start;
        }
        .news-card h3 {
            font-size: 1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .news-card p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }
        .news-card .btn-sm {
            align-self: flex-start;
        }

        /* ========== SECURITY / GUARANTEE ========== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .guarantee-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
            transition: all var(--transition-fast);
        }
        .guarantee-card:hover {
            border-color: var(--color-primary-hover);
            transform: translateY(-2px);
        }
        .guarantee-icon {
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--color-primary-hover);
            background-color: var(--color-primary-soft);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
        }
        .guarantee-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .guarantee-card p {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ========== QUICK FAQ ========== */
        .quick-faq-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .quick-faq-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 14px 18px;
            cursor: pointer;
            transition: all var(--transition-fast);
            min-height: 56px;
        }
        .quick-faq-item:hover {
            border-color: var(--color-primary-hover);
            background-color: var(--color-primary-soft);
        }
        .quick-faq-item .qf-q {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-text);
            flex-shrink: 0;
        }
        .quick-faq-item .qf-a {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover { border-color: var(--color-border-strong); }
        .faq-item[open] { border-color: var(--color-primary-hover); }
        .faq-item summary {
            padding: 18px 20px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            color: var(--color-text);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '+';
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-faint);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(180deg);
            color: var(--color-primary-hover);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.8;
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 200px;
            display: flex;
            align-items: flex-end;
            transition: all var(--transition-fast);
            border: 1px solid var(--color-border);
        }
        .scenario-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .scenario-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scenario-overlay {
            position: relative;
            z-index: 2;
            padding: 24px;
            background: linear-gradient(to top, rgba(26, 26, 26, 0.9), rgba(26, 26, 26, 0.3));
            width: 100%;
            color: var(--color-text-inverse);
        }
        .scenario-overlay h3 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 6px;
        }
        .scenario-overlay p {
            font-size: 0.85rem;
            color: rgba(250, 250, 247, 0.75);
            line-height: 1.6;
        }

        /* ========== TOOL CARDS ========== */
        .tool-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .tool-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: all var(--transition-fast);
        }
        .tool-card:hover {
            border-color: var(--color-primary-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .tool-card .tool-index {
            font-size: 1.3rem;
            font-weight: 900;
            color: var(--color-primary-hover);
            font-family: var(--font-mono);
            flex-shrink: 0;
        }
        .tool-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .tool-card p {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ========== PARTNER WALL ========== */
        .partner-section { background-color: var(--color-bg-card); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
        .partner-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .partner-logo-item {
            padding: 16px 24px;
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-weight: 800;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            cursor: default;
            letter-spacing: 0.02em;
        }
        .partner-logo-item:hover {
            border-color: var(--color-primary-hover);
            color: var(--color-text);
            background-color: var(--color-primary-soft);
        }

        /* ========== CONVERSION FORM ========== */
        .conversion-section {
            background-color: var(--color-secondary);
            color: var(--color-text-inverse);
            padding: 56px 32px;
        }
        .conversion-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .conversion-info h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--color-text-inverse);
        }
        .conversion-info p {
            font-size: 0.95rem;
            color: rgba(250, 250, 247, 0.7);
            line-height: 1.8;
        }
        .conversion-form {
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 28px;
        }
        .conversion-form .form-group {
            margin-bottom: 16px;
        }
        .conversion-form label {
            display: block;
            font-size: 0.82rem;
            font-weight: 600;
            color: rgba(250, 250, 247, 0.8);
            margin-bottom: 6px;
        }
        .conversion-form input,
        .conversion-form select {
            width: 100%;
            height: 46px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.9rem;
            appearance: none;
            -webkit-appearance: none;
            transition: border-color var(--transition-fast);
        }
        .conversion-form input:focus,
        .conversion-form select:focus { outline: none; border-color: var(--color-primary); }
        .conversion-form input::placeholder { color: rgba(255, 255, 255, 0.45); }
        .conversion-form select option { background-color: var(--color-secondary); color: var(--color-text-inverse); }
        .conversion-form .form-hint {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.45);
            margin-top: 10px;
            line-height: 1.5;
        }

        /* ========== DATA STRIP ========== */
        .data-strip-section { padding: 24px 32px; background-color: var(--color-bg-alt); }
        .data-strip {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            background-color: var(--color-secondary);
            border-radius: var(--radius-md);
            padding: 20px 28px;
            color: var(--color-text-inverse);
        }
        .data-strip .strip-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: rgba(250, 250, 247, 0.7);
        }
        .data-strip .strip-number {
            font-size: 1.8rem;
            font-weight: 900;
            font-family: var(--font-mono);
            color: var(--color-primary);
            letter-spacing: -0.02em;
        }
        .data-strip .strip-unit {
            font-size: 0.8rem;
            color: rgba(250, 250, 247, 0.6);
            margin-left: 4px;
        }
        .data-strip .strip-sep {
            width: 1px;
            height: 36px;
            background-color: rgba(255, 255, 255, 0.2);
        }

        /* ========== BOTTOM CTA ========== */
        .bottom-cta-section {
            padding: 32px 32px;
            background-color: var(--color-bg);
        }
        .bottom-cta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            background-color: var(--color-primary-soft);
            border: 1px solid var(--color-primary-hover);
            border-radius: var(--radius-md);
            padding: 20px 28px;
        }
        .bottom-cta p {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background-color: var(--color-secondary);
            color: var(--color-text-inverse);
            padding: 48px 32px 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-logo {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: var(--color-text-inverse);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(250, 250, 247, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: rgba(250, 250, 247, 0.8);
            margin-bottom: 14px;
        }
        .footer-col ul { list-style: none; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul a {
            font-size: 0.85rem;
            color: rgba(250, 250, 247, 0.55);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover { color: var(--color-primary); }
        .footer-subscribe p {
            font-size: 0.85rem;
            color: rgba(250, 250, 247, 0.6);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .footer-subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-subscribe-form input {
            flex: 1;
            min-width: 160px;
            height: 42px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
        }
        .footer-subscribe-form input:focus { outline: none; border-color: var(--color-primary); }
        .footer-subscribe-form input::placeholder { color: rgba(255, 255, 255, 0.45); }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.75rem;
            color: rgba(250, 250, 247, 0.4);
        }
        .footer-bottom a {
            color: rgba(250, 250, 247, 0.5);
            text-decoration: underline;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover { color: var(--color-primary); }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .metric-grid { grid-template-columns: repeat(2, 1fr); }
            .service-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
            .tool-grid { grid-template-columns: repeat(2, 1fr); }
            .comparison-grid { grid-template-columns: 1fr; }
            .brand-intro-grid { grid-template-columns: 1fr; gap: 20px; }
            .conversion-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero-title { font-size: 2.4rem; }
        }
        @media (max-width: 900px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: var(--shadow-lg);
            }
            .sidebar.visible { transform: translateX(0); }
            .sidebar-overlay.visible { display: block; opacity: 1; }
            .sidebar-overlay { display: block; opacity: 0; pointer-events: none; }
            .sidebar-overlay.visible { pointer-events: auto; }
            .main-content { margin-left: 0; }
            .hamburger-btn { display: flex; }
            .mobile-search-btn { display: flex; }
            .header-search { display: none; }
            .header-search.mobile-visible {
                display: block;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                margin: 0;
                max-width: none;
                padding: 12px 16px;
                background-color: var(--color-secondary);
                border-bottom: 1px solid rgba(255, 255, 255, 0.15);
                z-index: 999;
            }
            .header-controls select { display: none; }
            .header-controls select.mobile-visible { display: block; }
            .page-section { padding: 40px 20px; }
            .hero-content { padding: 56px 20px; }
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 0.95rem; }
        }
        @media (max-width: 600px) {
            :root { --header-height: 60px; }
            .metric-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
            .metric-card { padding: 14px; }
            .metric-number { font-size: 1.8rem; }
            .service-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .guarantee-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
            .tool-grid { grid-template-columns: 1fr; }
            .quick-faq-list { grid-template-columns: 1fr; }
            .scenario-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.4rem; }
            .hero-title { font-size: 1.7rem; }
            .hero-form-row { flex-direction: column; }
            .hero-form-row select, .hero-form-row input { min-width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .page-section { padding: 32px 16px; }
            .conversion-section { padding: 40px 16px; }
            .data-strip-section { padding: 16px; }
            .data-strip { padding: 16px 18px; flex-direction: column; align-items: flex-start; }
            .data-strip .strip-sep { display: none; }
            .bottom-cta-section { padding: 16px; }
            .bottom-cta { padding: 16px 18px; flex-direction: column; align-items: flex-start; }
            .timeline { flex-direction: column; align-items: stretch; padding: 0; }
            .timeline-item { min-width: 0; text-align: left; padding: 12px 0 12px 40px; border-left: 2px solid var(--color-border-strong); margin-left: 12px; }
            .timeline-item::before { display: none; }
            .timeline-dot { position: absolute; left: -14px; top: 12px; margin: 0; }
            .timeline-desc { max-width: none; }
            .brand-logo { font-size: 1.05rem; }
            .brand-logo .logo-mark { width: 28px; height: 28px; font-size: 0.9rem; }
            .partner-logo-item { padding: 12px 16px; font-size: 0.8rem; }
        }

/* roulang page: category2 */
:root {
      --color-primary: #D4FF00;
      --color-primary-hover: #BFE600;
      --color-primary-soft: rgba(212, 255, 0, 0.12);
      --color-secondary: #1A1A1A;
      --color-secondary-light: #2A2A2A;
      --color-secondary-mid: #3A3A3A;
      --color-bg: #FAFAF7;
      --color-bg-alt: #F0F0EA;
      --color-bg-card: #FFFFFF;
      --color-text: #1A1A1A;
      --color-text-inverse: #FAFAF7;
      --color-text-muted: #666666;
      --color-text-faint: #999999;
      --color-border: #E5E5E0;
      --color-border-strong: #D0D0C8;
      --color-accent: #FF3B30;
      --color-accent-soft: rgba(255, 59, 48, 0.10);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 10px;
      --radius-xl: 16px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
      --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
      --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
      --transition-mid: 200ms cubic-bezier(0.4, 0, 0.2, 1);
      --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "SF Mono", "Menlo", "Consolas", "PingFang SC", monospace;
      --header-height: 60px;
      --sidebar-width: 272px;
      --container-max: 1280px;
    }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
      font-family: var(--font-sans);
      font-size: 0.95rem;
      line-height: 1.75;
      color: var(--color-text);
      background-color: var(--color-bg);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
      padding-top: var(--header-height);
    }
    a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
    a:hover { color: var(--color-primary-hover); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: none; background: none; }
    .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
    :focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

    /* ========== HEADER ========== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--header-height);
      background-color: var(--color-secondary);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      border-bottom: 2px solid var(--color-primary);
    }
    .header-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
    .hamburger-btn {
      display: none;
      color: var(--color-text-inverse);
      font-size: 1.5rem;
      line-height: 1;
      padding: 8px;
      border-radius: var(--radius-sm);
      transition: background-color var(--transition-fast);
    }
    .hamburger-btn:hover { background-color: rgba(255, 255, 255, 0.1); }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      font-size: 1.2rem;
      color: var(--color-text-inverse);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .brand-logo .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 30px;
      height: 30px;
      border-radius: var(--radius-sm);
      background-color: var(--color-primary);
      color: var(--color-secondary);
      font-size: 1rem;
      font-weight: 900;
      flex-shrink: 0;
    }
    .header-search {
      flex: 1;
      max-width: 440px;
      margin: 0 20px;
      position: relative;
    }
    .header-search input {
      width: 100%;
      height: 38px;
      padding: 0 38px 0 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 0.88rem;
      transition: border-color var(--transition-fast), background-color var(--transition-fast);
    }
    .header-search input::placeholder { color: rgba(255, 255, 255, 0.5); }
    .header-search input:focus {
      outline: none;
      border-color: var(--color-primary);
      background-color: rgba(255, 255, 255, 0.12);
    }
    .header-search .search-icon {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.9rem;
      pointer-events: none;
    }
    .header-controls { display: flex; align-items: center; gap: 10px; }
    .header-controls select {
      height: 38px;
      padding: 0 26px 0 10px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 0.82rem;
      appearance: none;
      -webkit-appearance: none;
      cursor: pointer;
      transition: border-color var(--transition-fast);
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23D4FF00' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 8px center;
    }
    .header-controls select:focus { outline: none; border-color: var(--color-primary); }
    .mobile-search-btn {
      display: none;
      color: var(--color-text-inverse);
      font-size: 1.3rem;
      padding: 8px;
      border-radius: var(--radius-sm);
      transition: background-color var(--transition-fast);
    }
    .mobile-search-btn:hover { background-color: rgba(255, 255, 255, 0.1); }

    /* ========== LAYOUT ========== */
    .page-wrapper {
      display: flex;
      min-height: calc(100vh - var(--header-height));
    }
    .sidebar {
      width: var(--sidebar-width);
      background-color: var(--color-bg-card);
      border-right: 1px solid var(--color-border);
      padding: 32px 0 40px;
      position: fixed;
      top: var(--header-height);
      bottom: 0;
      left: 0;
      overflow-y: auto;
      z-index: 500;
      transition: transform var(--transition-mid);
    }
    .sidebar-inner { padding: 0 16px; }
    .sidebar-title {
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--color-text-faint);
      padding: 0 12px 12px;
      border-bottom: 1px solid var(--color-border);
      margin-bottom: 12px;
    }
    .sidebar-nav { list-style: none; padding: 0; margin: 0; }
    .sidebar-nav li { margin: 2px 0; }
    .sidebar-nav a {
      display: block;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--color-text);
      transition: background-color var(--transition-fast), color var(--transition-fast);
      position: relative;
    }
    .sidebar-nav a:hover { background-color: var(--color-bg-alt); color: var(--color-text); }
    .sidebar-nav a.active {
      background-color: var(--color-primary-soft);
      color: var(--color-secondary);
      font-weight: 700;
    }
    .sidebar-nav a.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 20px;
      background-color: var(--color-primary-hover);
      border-radius: 2px;
    }
    .sidebar-section-label {
      font-size: 0.72rem;
      font-weight: 700;
      color: var(--color-text-faint);
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 16px 12px 6px;
    }
    .sidebar-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background-color: rgba(0, 0, 0, 0.4);
      z-index: 490;
    }
    .main-content {
      flex: 1;
      margin-left: var(--sidebar-width);
      min-width: 0;
      padding: 0;
    }
    .main-content>.container { padding: 32px 24px; }

    /* ========== BREADCRUMB ========== */
    .breadcrumb-custom {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--color-text-muted);
      padding: 0;
      margin: 0 0 24px;
      list-style: none;
    }
    .breadcrumb-custom li { display: flex; align-items: center; gap: 8px; }
    .breadcrumb-custom li:not(:last-child)::after { content: '/'; color: var(--color-text-faint); font-size: 0.8rem; }
    .breadcrumb-custom a { color: var(--color-text-muted); }
    .breadcrumb-custom a:hover { color: var(--color-primary-hover); }
    .breadcrumb-custom .current { color: var(--color-text); font-weight: 600; }

    /* ========== PAGE HEADER ========== */
    .page-header {
      background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 55%, #222 100%);
      padding: 48px 32px 40px;
      border-radius: var(--radius-lg);
      position: relative;
      overflow: hidden;
      margin-bottom: 36px;
    }
    .page-header::after {
      content: '';
      position: absolute;
      top: -60%;
      right: -15%;
      width: 320px;
      height: 320px;
      background: var(--color-primary);
      opacity: 0.08;
      transform: rotate(25deg);
      border-radius: 40px;
      pointer-events: none;
    }
    .page-header h1 {
      color: var(--color-text-inverse);
      font-size: 2.4rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.01em;
      margin-bottom: 14px;
      position: relative;
      z-index: 1;
    }
    .page-header h1 .highlight {
      color: var(--color-primary);
    }
    .page-header p {
      color: rgba(255, 255, 255, 0.75);
      font-size: 1rem;
      max-width: 720px;
      margin-bottom: 0;
      position: relative;
      z-index: 1;
    }
    .page-header .header-badge {
      display: inline-block;
      background-color: var(--color-primary);
      color: var(--color-secondary);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
      letter-spacing: 0.05em;
    }

    /* ========== SECTIONS ========== */
    .content-section { margin-bottom: 48px; }
    .section-title {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--color-text);
      margin-bottom: 20px;
      letter-spacing: -0.01em;
    }
    .section-title .title-accent {
      display: inline-block;
      width: 4px;
      height: 20px;
      background-color: var(--color-primary-hover);
      border-radius: 2px;
      margin-right: 10px;
      vertical-align: middle;
    }
    .section-subtitle {
      color: var(--color-text-muted);
      font-size: 0.92rem;
      margin-bottom: 24px;
    }

    /* Filter bar */
    .filter-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 14px 18px;
      margin-bottom: 28px;
    }
    .filter-bar .filter-label { font-size: 0.85rem; font-weight: 600; color: var(--color-text-muted); white-space: nowrap; }
    .filter-btn-group { display: flex; flex-wrap: wrap; gap: 6px; }
    .filter-btn {
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--color-text);
      background-color: var(--color-bg-alt);
      border: 1px solid transparent;
      transition: all var(--transition-fast);
      white-space: nowrap;
    }
    .filter-btn:hover { border-color: var(--color-primary-hover); color: var(--color-secondary); }
    .filter-btn.active {
      background-color: var(--color-primary);
      color: var(--color-secondary);
      font-weight: 700;
      border-color: var(--color-primary);
    }
    .filter-btn-group.view-toggle { margin-left: auto; }
    .filter-btn.view-btn {
      background-color: transparent;
      border: 1px solid var(--color-border);
      color: var(--color-text-muted);
    }
    .filter-btn.view-btn.active { background-color: var(--color-secondary); color: var(--color-text-inverse); border-color: var(--color-secondary); }

    /* Card grid */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .content-card {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: box-shadow var(--transition-mid), transform var(--transition-mid);
      display: flex;
      flex-direction: column;
    }
    .content-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
      border-color: var(--color-border-strong);
    }
    .content-card .card-img-wrap {
      position: relative;
      aspect-ratio: 16/9;
      overflow: hidden;
      background-color: var(--color-bg-alt);
    }
    .content-card .card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--transition-slow);
    }
    .content-card:hover .card-img-wrap img { transform: scale(1.04); }
    .content-card .card-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      background-color: var(--color-primary);
      color: var(--color-secondary);
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      letter-spacing: 0.03em;
      z-index: 2;
    }
    .content-card .card-body-inner { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
    .content-card .card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--color-text);
      margin-bottom: 8px;
      line-height: 1.4;
      transition: color var(--transition-fast);
    }
    .content-card:hover .card-title { color: var(--color-primary-hover); }
    .content-card .card-summary {
      font-size: 0.88rem;
      color: var(--color-text-muted);
      line-height: 1.65;
      margin-bottom: 14px;
      flex: 1;
    }
    .content-card .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.78rem;
      color: var(--color-text-faint);
    }
    .content-card .card-read-btn {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--color-secondary);
      padding: 4px 0;
      border-bottom: 2px solid var(--color-primary);
      transition: color var(--transition-fast), border-color var(--transition-fast);
    }
    .content-card .card-read-btn:hover { color: var(--color-primary-hover); border-color: var(--color-primary-hover); }

    /* Hot items */
    .hot-items {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .hot-item {
      background-color: var(--color-secondary);
      border-radius: var(--radius-md);
      padding: 18px;
      color: var(--color-text-inverse);
      transition: transform var(--transition-mid), box-shadow var(--transition-mid);
    }
    .hot-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
    .hot-item .hot-rank {
      font-size: 0.72rem;
      font-weight: 700;
      color: var(--color-primary);
      letter-spacing: 0.06em;
      margin-bottom: 6px;
    }
    .hot-item .hot-title {
      font-size: 0.95rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 6px;
      color: var(--color-text-inverse);
    }
    .hot-item .hot-score {
      font-family: var(--font-mono);
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--color-primary);
      letter-spacing: 0.02em;
    }
    .hot-item .hot-desc { font-size: 0.8rem; color: rgba(255, 255, 255, 0.65); margin-top: 6px; }

    /* Category description */
    .category-desc-block {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      gap: 32px;
      align-items: flex-start;
    }
    .category-desc-block .desc-icon {
      flex-shrink: 0;
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background-color: var(--color-primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      color: var(--color-secondary);
    }
    .category-desc-block h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
    .category-desc-block p { color: var(--color-text-muted); font-size: 0.92rem; margin-bottom: 8px; }
    .category-desc-block p:last-child { margin-bottom: 0; }

    /* Data strip */
    .data-strip {
      background: linear-gradient(135deg, var(--color-secondary) 0%, #2A2A2A 100%);
      border-radius: var(--radius-md);
      padding: 28px 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .data-strip .strip-label {
      color: var(--color-primary);
      font-weight: 700;
      font-size: 0.85rem;
      letter-spacing: 0.04em;
    }
    .data-strip .strip-value {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--color-text-inverse);
      line-height: 1.1;
    }
    .data-strip .strip-unit {
      font-size: 0.8rem;
      color: rgba(255, 255, 255, 0.55);
      margin-left: 4px;
    }
    .data-strip .strip-item {
      text-align: center;
      min-width: 100px;
    }

    /* FAQ */
    .faq-list { display: flex; flex-direction: column; gap: 12px; }
    .faq-item {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-item details { padding: 0; }
    .faq-item summary {
      padding: 18px 22px;
      font-weight: 700;
      font-size: 0.95rem;
      cursor: pointer;
      list-style: none;
      position: relative;
      color: var(--color-text);
      transition: background-color var(--transition-fast);
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
      content: '+';
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 1.3rem;
      font-weight: 300;
      color: var(--color-text-muted);
      transition: transform var(--transition-fast);
    }
    .faq-item details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
    .faq-item summary:hover { background-color: var(--color-bg-alt); }
    .faq-item .faq-answer {
      padding: 0 22px 18px;
      font-size: 0.9rem;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* CTA short */
    .cta-short-block {
      background: linear-gradient(135deg, var(--color-secondary) 0%, #222 100%);
      border-radius: var(--radius-lg);
      padding: 40px 36px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-short-block::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -10%;
      width: 200px;
      height: 200px;
      background: var(--color-primary);
      opacity: 0.07;
      border-radius: 50%;
      pointer-events: none;
    }
    .cta-short-block h3 {
      color: var(--color-text-inverse);
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 10px;
      position: relative;
      z-index: 1;
    }
    .cta-short-block p {
      color: rgba(255, 255, 255, 0.7);
      font-size: 0.92rem;
      margin-bottom: 22px;
      position: relative;
      z-index: 1;
    }
    .cta-short-block .btn-group-cta {
      display: flex;
      gap: 12px;
      justify-content: center;
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    /* Buttons */
    .btn { border-radius: var(--radius-sm); font-weight: 600; transition: all var(--transition-fast); }
    .btn-primary {
      background-color: var(--color-primary);
      color: var(--color-secondary);
      border: 1px solid var(--color-primary);
      padding: 10px 24px;
      font-size: 0.9rem;
    }
    .btn-primary:hover {
      background-color: var(--color-primary-hover);
      border-color: var(--color-primary-hover);
      color: var(--color-secondary);
    }
    .btn-outline-light {
      background-color: transparent;
      color: var(--color-text-inverse);
      border: 1px solid rgba(255, 255, 255, 0.4);
      padding: 10px 24px;
      font-size: 0.9rem;
    }
    .btn-outline-light:hover { border-color: var(--color-primary); color: var(--color-primary); }
    .btn-sm { padding: 7px 16px; font-size: 0.82rem; }

    /* ========== FOOTER ========== */
    .site-footer {
      background-color: var(--color-secondary);
      color: var(--color-text-inverse);
      padding: 48px 24px 0;
      margin-left: var(--sidebar-width);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr 1.3fr;
      gap: 32px;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .footer-brand .brand-logo { font-size: 1.1rem; margin-bottom: 12px; }
    .footer-brand p { color: rgba(255, 255, 255, 0.6); font-size: 0.85rem; line-height: 1.7; max-width: 320px; }
    .footer-col h4 {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--color-text-inverse);
      margin-bottom: 14px;
      letter-spacing: 0.04em;
    }
    .footer-col ul { list-style: none; padding: 0; margin: 0; }
    .footer-col ul li { margin-bottom: 8px; }
    .footer-col ul li a { color: rgba(255, 255, 255, 0.6); font-size: 0.85rem; transition: color var(--transition-fast); }
    .footer-col ul li a:hover { color: var(--color-primary); }
    .footer-subscribe h4 {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--color-text-inverse);
      margin-bottom: 12px;
      letter-spacing: 0.04em;
    }
    .footer-subscribe p { color: rgba(255, 255, 255, 0.6); font-size: 0.82rem; margin-bottom: 14px; }
    .footer-subscribe-form { display: flex; gap: 8px; }
    .footer-subscribe-form input {
      flex: 1;
      height: 38px;
      padding: 0 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 0.85rem;
    }
    .footer-subscribe-form input::placeholder { color: rgba(255, 255, 255, 0.45); }
    .footer-subscribe-form input:focus { outline: none; border-color: var(--color-primary); }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      margin-top: 36px;
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 0.8rem;
      color: rgba(255, 255, 255, 0.45);
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
    }
    .footer-bottom a { color: rgba(255, 255, 255, 0.45); }
    .footer-bottom a:hover { color: var(--color-primary); }

    /* ========== RESPONSIVE ========== */
    @media (max-width: 1024px) {
      .card-grid { grid-template-columns: repeat(2, 1fr); }
      .hot-items { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 900px) {
      .sidebar {
        transform: translateX(-100%);
        top: var(--header-height);
        z-index: 600;
      }
      .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-hover); }
      .sidebar-overlay.active { display: block; }
      .hamburger-btn { display: inline-flex; }
      .main-content { margin-left: 0; }
      .site-footer { margin-left: 0; }
      .header-search { display: none; }
      .header-controls select { display: none; }
      .mobile-search-btn { display: inline-flex; }
      .page-header h1 { font-size: 1.8rem; }
      .card-grid { grid-template-columns: 1fr; }
      .hot-items { grid-template-columns: 1fr; }
      .category-desc-block { flex-direction: column; }
      .data-strip {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        gap: 24px;
      }
      .footer-grid { grid-template-columns: 1fr; gap: 24px; }
      .footer-bottom { flex-direction: column; align-items: flex-start; }
    }
    @media (max-width: 600px) {
      :root { --header-height: 56px; }
      .container { padding: 0 16px; }
      .main-content>.container { padding: 20px 16px; }
      .page-header { padding: 32px 20px 28px; }
      .page-header h1 { font-size: 1.5rem; }
      .page-header p { font-size: 0.88rem; }
      .section-title { font-size: 1.25rem; }
      .filter-bar { padding: 12px; gap: 8px; }
      .filter-btn { padding: 5px 10px; font-size: 0.75rem; }
      .btn { padding: 9px 18px; font-size: 0.85rem; }
      .cta-short-block { padding: 28px 20px; }
      .cta-short-block h3 { font-size: 1.3rem; }
      .data-strip .strip-value { font-size: 1.5rem; }
      .footer-subscribe-form { flex-direction: column; }
      .site-header { padding: 0 14px; }
      .brand-logo { font-size: 1rem; }
    }

/* roulang page: category3 */
:root {
      --color-primary: #D4FF00;
      --color-primary-hover: #BFE600;
      --color-primary-soft: rgba(212, 255, 0, 0.12);
      --color-secondary: #1A1A1A;
      --color-secondary-light: #2A2A2A;
      --color-secondary-mid: #3A3A3A;
      --color-bg: #FAFAF7;
      --color-bg-alt: #F0F0EA;
      --color-bg-card: #FFFFFF;
      --color-text: #1A1A1A;
      --color-text-inverse: #FAFAF7;
      --color-text-muted: #666666;
      --color-text-faint: #999999;
      --color-border: #E5E5E0;
      --color-border-strong: #D0D0C8;
      --color-accent: #FF3B30;
      --color-accent-soft: rgba(255, 59, 48, 0.10);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 10px;
      --radius-xl: 16px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
      --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
      --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
      --transition-mid: 200ms cubic-bezier(0.4, 0, 0.2, 1);
      --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "SF Mono", "Menlo", "Consolas", "PingFang SC", monospace;
      --header-height: 68px;
      --sidebar-width: 272px;
      --container-max: 1280px;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-sans);
      font-size: 0.95rem;
      line-height: 1.75;
      color: var(--color-text);
      background-color: var(--color-bg);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
      margin: 0;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    a:hover {
      color: var(--color-primary-hover);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
      font-size: inherit;
    }

    button {
      cursor: pointer;
      border: none;
      background: none;
      color: inherit;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== HEADER ========== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--header-height);
      background-color: var(--color-secondary);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      border-bottom: 2px solid var(--color-primary);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    }

    .header-left {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-shrink: 0;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--color-text-inverse);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .brand-logo:hover {
      color: var(--color-text-inverse);
      opacity: 0.92;
    }

    .brand-logo .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      border-radius: var(--radius-sm);
      background-color: var(--color-primary);
      color: var(--color-secondary);
      font-size: 1.1rem;
      font-weight: 900;
      flex-shrink: 0;
    }

    .hamburger-btn {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 1.25rem;
      align-items: center;
      justify-content: center;
      line-height: 1;
      transition: background-color var(--transition-fast);
    }

    .hamburger-btn:hover {
      background-color: rgba(255, 255, 255, 0.16);
    }

    .header-search {
      flex: 1;
      max-width: 480px;
      margin: 0 24px;
      position: relative;
    }

    .header-search input {
      width: 100%;
      height: 40px;
      padding: 0 40px 0 16px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 0.9rem;
      transition: border-color var(--transition-fast), background-color var(--transition-fast);
      outline: none;
    }

    .header-search input::placeholder {
      color: rgba(255, 255, 255, 0.5);
    }

    .header-search input:focus {
      border-color: var(--color-primary);
      background-color: rgba(255, 255, 255, 0.12);
    }

    .header-search .search-icon {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.9rem;
      pointer-events: none;
    }

    .header-controls {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .header-controls select {
      height: 40px;
      padding: 0 28px 0 12px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 0.85rem;
      appearance: none;
      -webkit-appearance: none;
      cursor: pointer;
      transition: border-color var(--transition-fast), background-color var(--transition-fast);
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23FAFAF7' stroke-width='1.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 10px center;
      outline: none;
    }

    .header-controls select:focus {
      border-color: var(--color-primary);
      background-color: rgba(255, 255, 255, 0.12);
    }

    .header-controls option {
      color: var(--color-text);
      background-color: #fff;
    }

    .mobile-search-btn {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 1rem;
      align-items: center;
      justify-content: center;
      line-height: 1;
      transition: background-color var(--transition-fast);
    }

    .mobile-search-btn:hover {
      background-color: rgba(255, 255, 255, 0.16);
    }

    /* ========== LAYOUT SHELL ========== */
    .layout-shell {
      display: block;
      padding-top: var(--header-height);
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      top: var(--header-height);
      left: 0;
      bottom: 0;
      width: var(--sidebar-width);
      background-color: var(--color-bg-alt);
      border-right: 1px solid var(--color-border);
      padding: 24px 16px;
      overflow-y: auto;
      z-index: 900;
      transition: transform var(--transition-slow);
    }

    .sidebar-nav-title {
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--color-text-faint);
      margin: 0 12px 12px;
    }

    .sidebar-nav {
      list-style: none;
      margin: 0 0 24px;
      padding: 0;
    }

    .sidebar-nav li {
      margin-bottom: 2px;
    }

    .sidebar-nav a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      color: var(--color-text-muted);
      font-weight: 500;
      font-size: 0.9rem;
      line-height: 1.4;
      transition: background-color var(--transition-fast), color var(--transition-fast);
    }

    .sidebar-nav a:hover {
      background-color: rgba(0, 0, 0, 0.04);
      color: var(--color-text);
    }

    .sidebar-nav a.active {
      background-color: var(--color-primary-soft);
      color: var(--color-text);
      font-weight: 700;
      box-shadow: inset 3px 0 0 var(--color-primary);
    }

    .sidebar-nav a .nav-indicator {
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background-color: var(--color-text-faint);
      flex-shrink: 0;
    }

    .sidebar-nav a.active .nav-indicator {
      background-color: var(--color-primary);
    }

    .sidebar-section-label {
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--color-text-faint);
      margin: 20px 12px 8px;
    }

    .sidebar-section-links {
      list-style: none;
      margin: 0 0 24px;
      padding: 0;
    }

    .sidebar-section-links li {
      margin-bottom: 2px;
    }

    .sidebar-section-links a {
      display: block;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      color: var(--color-text-muted);
      font-size: 0.85rem;
      line-height: 1.4;
      transition: background-color var(--transition-fast), color var(--transition-fast);
    }

    .sidebar-section-links a:hover {
      background-color: rgba(0, 0, 0, 0.04);
      color: var(--color-text);
    }

    .sidebar-section-links a.active-anchor {
      color: var(--color-text);
      font-weight: 600;
      background-color: rgba(0, 0, 0, 0.03);
    }

    .sidebar-overlay {
      display: none;
      position: fixed;
      top: var(--header-height);
      left: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(0, 0, 0, 0.4);
      z-index: 850;
      opacity: 0;
      transition: opacity var(--transition-fast);
    }

    .content-main {
      margin-left: var(--sidebar-width);
      padding: 32px 24px 80px;
      max-width: calc(100% - var(--sidebar-width));
    }

    /* ========== PAGE HEAD ========== */
    .page-head {
      padding: 16px 0 28px;
      border-bottom: 1px solid var(--color-border);
      margin-bottom: 32px;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.82rem;
      color: var(--color-text-faint);
      margin-bottom: 12px;
      list-style: none;
      padding: 0;
    }

    .breadcrumb li {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .breadcrumb li:not(:last-child)::after {
      content: "›";
      color: var(--color-text-faint);
      font-size: 1rem;
      line-height: 1;
    }

    .breadcrumb a {
      color: var(--color-text-muted);
      transition: color var(--transition-fast);
    }

    .breadcrumb a:hover {
      color: var(--color-text);
    }

    .page-head h1 {
      font-size: 2.4rem;
      line-height: 1.18;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin: 0 0 14px;
      color: var(--color-text);
    }

    .page-head h1 .highlight {
      color: var(--color-text);
      background: linear-gradient(transparent 62%, rgba(212, 255, 0, 0.45) 62%);
      padding: 0 2px;
    }

    .page-head-desc {
      font-size: 1rem;
      line-height: 1.8;
      color: var(--color-text-muted);
      max-width: 780px;
      margin: 0;
    }

    /* ========== FILTER / SORT BAR ========== */
    .filter-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 12px 16px;
      margin-bottom: 28px;
      box-shadow: var(--shadow-sm);
    }

    .filter-group {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .filter-group label {
      font-size: 0.82rem;
      color: var(--color-text-muted);
      white-space: nowrap;
    }

    .filter-group select {
      height: 36px;
      padding: 0 28px 0 10px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border-strong);
      background-color: #fff;
      color: var(--color-text);
      font-size: 0.85rem;
      appearance: none;
      -webkit-appearance: none;
      cursor: pointer;
      transition: border-color var(--transition-fast);
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23666666' stroke-width='1.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 10px center;
      outline: none;
    }

    .filter-group select:focus {
      border-color: var(--color-primary-hover);
    }

    .filter-action-btn {
      height: 36px;
      padding: 0 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border-strong);
      background-color: #fff;
      color: var(--color-text-muted);
      font-size: 0.85rem;
      font-weight: 500;
      transition: all var(--transition-fast);
      white-space: nowrap;
    }

    .filter-action-btn:hover {
      border-color: var(--color-text-faint);
      color: var(--color-text);
      background-color: var(--color-bg-alt);
    }

    .filter-view-toggle {
      margin-left: auto;
      display: flex;
      gap: 4px;
    }

    .filter-view-toggle button {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border-strong);
      background-color: #fff;
      color: var(--color-text-muted);
      font-size: 0.9rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all var(--transition-fast);
    }

    .filter-view-toggle button.active {
      background-color: var(--color-secondary);
      border-color: var(--color-secondary);
      color: var(--color-text-inverse);
    }

    .filter-view-toggle button:hover:not(.active) {
      background-color: var(--color-bg-alt);
      color: var(--color-text);
    }

    /* ========== CARDS GRID ========== */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 48px;
    }

    .integr-card {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: box-shadow var(--transition-mid), transform var(--transition-mid);
    }

    .integr-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }

    .integr-card-media {
      position: relative;
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background-color: var(--color-bg-alt);
    }

    .integr-card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--transition-slow);
    }

    .integr-card:hover .integr-card-media img {
      transform: scale(1.03);
    }

    .integr-card-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background-color: rgba(26, 26, 26, 0.85);
      color: var(--color-text-inverse);
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      padding: 4px 10px;
      border-radius: 20px;
      z-index: 2;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .integr-card-body {
      padding: 18px 18px 16px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .integr-card-title {
      font-size: 1.08rem;
      line-height: 1.4;
      font-weight: 700;
      margin: 0 0 10px;
      color: var(--color-text);
      transition: color var(--transition-fast);
    }

    .integr-card:hover .integr-card-title {
      color: var(--color-text);
    }

    .integr-card-summary {
      font-size: 0.88rem;
      line-height: 1.65;
      color: var(--color-text-muted);
      margin: 0 0 16px;
      flex: 1;
    }

    .integr-card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      padding-top: 12px;
      border-top: 1px solid var(--color-border);
      font-size: 0.78rem;
      color: var(--color-text-faint);
    }

    .integr-card-date {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      white-space: nowrap;
    }

    .integr-card-link {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--color-text);
      padding: 5px 10px;
      border-radius: var(--radius-sm);
      background-color: var(--color-bg-alt);
      transition: background-color var(--transition-fast), color var(--transition-fast);
      white-space: nowrap;
    }

    .integr-card-link:hover {
      background-color: var(--color-primary-soft);
      color: var(--color-text);
    }

    /* ========== HOT FOCUS ========== */
    .section-block {
      margin-bottom: 48px;
    }

    .section-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 16px;
    }

    .section-head h2 {
      font-size: 1.5rem;
      line-height: 1.3;
      font-weight: 800;
      letter-spacing: -0.01em;
      margin: 0;
      color: var(--color-text);
    }

    .section-head .section-tag {
      font-size: 0.75rem;
      color: var(--color-text-faint);
      letter-spacing: 0.05em;
      font-weight: 600;
    }

    .hot-focus-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .hot-focus-item {
      background-color: var(--color-secondary);
      color: var(--color-text-inverse);
      border-radius: var(--radius-md);
      padding: 16px;
      border: 1px solid var(--color-secondary-light);
      transition: transform var(--transition-mid), box-shadow var(--transition-mid);
    }

    .hot-focus-item:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
    }

    .hot-focus-label {
      font-size: 0.72rem;
      letter-spacing: 0.06em;
      color: var(--color-primary);
      font-weight: 700;
      margin-bottom: 6px;
    }

    .hot-focus-title {
      font-size: 0.95rem;
      line-height: 1.4;
      font-weight: 700;
      margin: 0 0 4px;
    }

    .hot-focus-desc {
      font-size: 0.8rem;
      line-height: 1.5;
      color: rgba(255, 255, 255, 0.65);
      margin: 0 0 10px;
    }

    .hot-focus-meta {
      font-size: 0.72rem;
      color: rgba(255, 255, 255, 0.5);
    }

    /* ========== INFO BLOCK ========== */
    .info-block {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      gap: 32px;
      align-items: flex-start;
      margin-bottom: 48px;
    }

    .info-block-left {
      flex-shrink: 0;
      width: 240px;
    }

    .info-block-left h2 {
      font-size: 1.4rem;
      line-height: 1.3;
      font-weight: 800;
      margin: 0;
      color: var(--color-text);
    }

    .info-block-right {
      flex: 1;
    }

    .info-block-right p {
      font-size: 0.95rem;
      line-height: 1.85;
      color: var(--color-text-muted);
      margin: 0 0 12px;
    }

    .info-block-right p:last-child {
      margin-bottom: 0;
    }

    .info-block-highlight {
      color: var(--color-text);
      font-weight: 600;
    }

    /* ========== STATS STRIP ========== */
    .stats-strip {
      background-color: var(--color-secondary);
      color: var(--color-text-inverse);
      border-radius: var(--radius-lg);
      padding: 20px 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 48px;
    }

    .stat-item {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1;
    }

    .stat-label {
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.7);
    }

    .stat-divider {
      width: 1px;
      height: 32px;
      background-color: rgba(255, 255, 255, 0.15);
      flex-shrink: 0;
    }

    /* ========== FAQ ========== */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 780px;
    }

    .faq-item {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color var(--transition-fast);
    }

    .faq-item summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 16px 18px;
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--color-text);
      background-color: var(--color-bg-card);
      transition: background-color var(--transition-fast);
      outline: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary:hover {
      background-color: var(--color-bg-alt);
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      line-height: 1;
      color: var(--color-text-faint);
      transition: transform var(--transition-fast);
      flex-shrink: 0;
    }

    .faq-item[open] .faq-toggle-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      padding: 0 18px 16px;
      font-size: 0.9rem;
      line-height: 1.75;
      color: var(--color-text-muted);
    }

    /* ========== SUBSCRIBE MINI ========== */
    .subscribe-mini {
      background-color: var(--color-bg-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-md);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 20px;
      margin-bottom: 16px;
    }

    .subscribe-mini-content {
      flex: 1;
      min-width: 200px;
    }

    .subscribe-mini-content h2 {
      font-size: 1.3rem;
      line-height: 1.3;
      font-weight: 800;
      margin: 0 0 6px;
      color: var(--color-text);
    }

    .subscribe-mini-content p {
      font-size: 0.88rem;
      color: var(--color-text-muted);
      margin: 0;
      line-height: 1.6;
    }

    .subscribe-mini-form {
      display: flex;
      gap: 8px;
      flex-shrink: 0;
    }

    .subscribe-mini-form input {
      height: 42px;
      padding: 0 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border-strong);
      background-color: #fff;
      color: var(--color-text);
      font-size: 0.9rem;
      min-width: 200px;
      outline: none;
      transition: border-color var(--transition-fast);
    }

    .subscribe-mini-form input:focus {
      border-color: var(--color-primary-hover);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 42px;
      padding: 0 20px;
      border-radius: var(--radius-sm);
      background-color: var(--color-primary);
      color: var(--color-secondary);
      font-weight: 800;
      font-size: 0.9rem;
      letter-spacing: 0.02em;
      transition: background-color var(--transition-fast), transform var(--transition-fast);
      white-space: nowrap;
      border: none;
    }

    .btn-primary:hover {
      background-color: var(--color-primary-hover);
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: translateY(0);
    }

    /* ========== FOOTER ========== */
    .site-footer {
      background-color: var(--color-secondary);
      color: var(--color-text-inverse);
      padding: 48px 24px 24px;
      margin-top: 0;
      border-top: 2px solid var(--color-primary);
    }

    .footer-grid {
      max-width: var(--container-max);
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
      gap: 32px;
      margin-bottom: 32px;
    }

    .footer-brand .brand-logo {
      color: var(--color-text-inverse);
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 0.85rem;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.6);
      margin: 0;
      max-width: 280px;
    }

    .footer-col h4 {
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: rgba(255, 255, 255, 0.5);
      margin: 0 0 12px;
    }

    .footer-col ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .footer-col li {
      margin-bottom: 8px;
    }

    .footer-col a {
      color: rgba(255, 255, 255, 0.75);
      font-size: 0.85rem;
      transition: color var(--transition-fast);
    }

    .footer-col a:hover {
      color: var(--color-primary);
    }

    .footer-subscribe h4 {
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: rgba(255, 255, 255, 0.5);
      margin: 0 0 12px;
    }

    .footer-subscribe p {
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.6);
      margin: 0 0 12px;
      line-height: 1.6;
    }

    .footer-subscribe-form {
      display: flex;
      gap: 8px;
    }

    .footer-subscribe-form input {
      flex: 1;
      height: 40px;
      padding: 0 12px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background-color: rgba(255, 255, 255, 0.08);
      color: var(--color-text-inverse);
      font-size: 0.85rem;
      outline: none;
      transition: border-color var(--transition-fast);
    }

    .footer-subscribe-form input::placeholder {
      color: rgba(255, 255, 255, 0.5);
    }

    .footer-subscribe-form input:focus {
      border-color: var(--color-primary);
    }

    .btn-sm {
      height: 40px;
      padding: 0 16px;
      font-size: 0.85rem;
    }

    .footer-bottom {
      max-width: var(--container-max);
      margin: 0 auto;
      padding-top: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 0.8rem;
      color: rgba(255, 255, 255, 0.5);
      flex-wrap: wrap;
    }

    .footer-bottom a {
      color: rgba(255, 255, 255, 0.6);
      transition: color var(--transition-fast);
    }

    .footer-bottom a:hover {
      color: var(--color-primary);
    }

    /* ========== RESPONSIVE ========== */
    @media (max-width: 1100px) {
      .cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hot-focus-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .info-block {
        flex-direction: column;
        gap: 16px;
      }
      .info-block-left {
        width: 100%;
      }
      .header-controls select:nth-child(2),
      .header-controls select:nth-child(3) {
        display: none;
      }
    }

    @media (max-width: 860px) {
      :root {
        --header-height: 60px;
      }
      .hamburger-btn {
        display: inline-flex;
      }
      .header-search {
        display: none;
      }
      .mobile-search-btn {
        display: inline-flex;
      }
      .header-controls {
        gap: 8px;
      }
      .header-controls select {
        display: none;
      }
      .sidebar {
        transform: translateX(-100%);
        width: 280px;
      }
      .sidebar.open {
        transform: translateX(0);
      }
      .sidebar-overlay {
        display: block;
        pointer-events: none;
      }
      .sidebar-overlay.active {
        opacity: 1;
        pointer-events: auto;
      }
      .content-main {
        margin-left: 0;
        padding: 24px 16px 60px;
        max-width: 100%;
      }
      .cards-grid {
        grid-template-columns: 1fr;
      }
      .hot-focus-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
      .stats-strip {
        flex-direction: column;
        align-items: flex-start;
      }
      .stat-divider {
        display: none;
      }
      .subscribe-mini {
        flex-direction: column;
        align-items: stretch;
      }
      .subscribe-mini-form {
        flex-direction: column;
      }
      .subscribe-mini-form input {
        min-width: 100%;
      }
    }

    @media (max-width: 520px) {
      .page-head h1 {
        font-size: 1.8rem;
      }
      .filter-bar {
        flex-direction: column;
        align-items: stretch;
      }
      .filter-group {
        flex-wrap: wrap;
      }
      .filter-view-toggle {
        margin-left: 0;
        justify-content: flex-end;
      }
      .integr-card-title {
        font-size: 1rem;
      }
      .btn-primary {
        width: 100%;
      }
    }

/* roulang page: category1 */
:root {
            --color-primary: #D4FF00;
            --color-primary-hover: #BFE600;
            --color-primary-soft: rgba(212, 255, 0, 0.12);
            --color-secondary: #1A1A1A;
            --color-secondary-light: #2A2A2A;
            --color-secondary-mid: #3A3A3A;
            --color-bg: #FAFAF7;
            --color-bg-alt: #F0F0EA;
            --color-bg-card: #FFFFFF;
            --color-text: #1A1A1A;
            --color-text-inverse: #FAFAF7;
            --color-text-muted: #666666;
            --color-text-faint: #999999;
            --color-border: #E5E5E0;
            --color-border-strong: #D0D0C8;
            --color-accent: #FF3B30;
            --color-accent-soft: rgba(255, 59, 48, 0.10);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 10px;
            --radius-xl: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-mid: 200ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", "Menlo", "Consolas", "PingFang SC", monospace;
            --header-height: 68px;
            --sidebar-width: 272px;
            --container-max: 1280px;
        }
        :root {
            --header-height: 60px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 0.95rem;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: var(--header-height);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ========== HEADER ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: var(--color-secondary);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            border-bottom: 2px solid var(--color-primary);
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--color-text-inverse);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-size: 1.1rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .hamburger-btn {
            display: none;
            color: var(--color-text-inverse);
            font-size: 1.4rem;
            line-height: 1;
            padding: 6px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast);
        }
        .hamburger-btn:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .header-search {
            flex: 1;
            max-width: 480px;
            margin: 0 24px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            height: 40px;
            padding: 0 40px 0 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.9rem;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
        }
        .header-search input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .header-search input:focus {
            outline: none;
            border-color: var(--color-primary);
            background-color: rgba(255, 255, 255, 0.12);
        }
        .header-search .search-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .header-controls {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-controls select {
            height: 40px;
            padding: 0 28px 0 12px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            transition: border-color var(--transition-fast);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23FAFAF7' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
        }
        .header-controls select:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .mobile-search-btn {
            display: none;
            color: var(--color-text-inverse);
            font-size: 1.3rem;
            line-height: 1;
            padding: 6px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast);
        }
        .mobile-search-btn:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        /* ========== SIDEBAR ========== */
        .doc-sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--color-bg);
            border-right: 1px solid var(--color-border);
            overflow-y: auto;
            z-index: 900;
            padding: 24px 16px 40px;
            transition: transform var(--transition-mid);
        }
        .doc-sidebar .sidebar-title {
            font-size: 0.75rem;
            font-weight: 800;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--color-text-faint);
            padding: 8px 12px;
            margin-top: 8px;
        }
        .doc-sidebar .sidebar-title:first-child {
            margin-top: 0;
        }
        .doc-sidebar ul {
            list-style: none;
            padding: 0;
        }
        .doc-sidebar ul li {
            margin: 0;
        }
        .doc-sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text);
            position: relative;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .doc-sidebar ul li a:hover {
            background-color: var(--color-bg-alt);
            color: var(--color-text);
        }
        .doc-sidebar ul li a.active {
            background-color: var(--color-primary-soft);
            color: var(--color-secondary);
            font-weight: 600;
        }
        .doc-sidebar ul li a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            background-color: var(--color-primary);
            border-radius: 0 3px 3px 0;
        }
        .doc-sidebar ul li a.active:hover {
            background-color: var(--color-primary-soft);
            color: var(--color-secondary);
        }
        .sidebar-toc li a {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            padding: 7px 12px;
        }
        .sidebar-toc li a::before {
            content: '·';
            font-weight: 700;
            color: var(--color-text-faint);
        }
        /* ========== MAIN CONTENT ========== */
        .page-layout {
            display: flex;
            min-height: calc(100vh - var(--header-height));
        }
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding: 0 24px 60px;
            max-width: calc(100% - var(--sidebar-width));
        }
        /* ========== SECTION COMMON ========== */
        .section {
            padding: 48px 0;
            border-bottom: 1px solid var(--color-border);
        }
        .section:last-child {
            border-bottom: none;
        }
        .section-title {
            font-size: 1.5rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
            color: var(--color-text);
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            line-height: 1.5;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-weight: 700;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            color: var(--color-secondary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-secondary);
            border: 1px solid var(--color-border-strong);
        }
        .btn-outline:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            background-color: var(--color-bg-alt);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.82rem;
        }
        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-secondary);
            transition: gap var(--transition-fast), color var(--transition-fast);
        }
        .btn-text:hover {
            color: var(--color-text-muted);
            gap: 10px;
        }
        .badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background-color: var(--color-bg-alt);
            color: var(--color-text-muted);
            border: 1px solid var(--color-border);
        }
        .badge-hot {
            background-color: var(--color-accent-soft);
            color: var(--color-accent);
            border-color: var(--color-accent-soft);
        }
        .badge-live {
            background-color: var(--color-primary-soft);
            color: #5A7A00;
            border-color: rgba(212, 255, 0, 0.25);
        }
        /* ========== PAGE HEADER ========== */
        .page-header {
            padding: 44px 0 24px;
            border-bottom: 1px solid var(--color-border);
            background-color: transparent;
        }
        .page-header h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            color: var(--color-text);
        }
        .page-header h1 .highlight {
            display: inline-block;
            position: relative;
        }
        .page-header h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 6px;
            background-color: var(--color-primary);
            z-index: -1;
            border-radius: 3px;
            opacity: 0.7;
        }
        .page-header p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            color: var(--color-text-faint);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary-hover);
        }
        .breadcrumb .sep {
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }
        /* ========== FILTER BAR ========== */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border);
        }
        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-group label {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            font-weight: 500;
            white-space: nowrap;
        }
        .filter-group select {
            height: 38px;
            padding: 0 28px 0 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-strong);
            background-color: var(--color-bg-card);
            color: var(--color-text);
            font-size: 0.85rem;
            cursor: pointer;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23666' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
            transition: border-color var(--transition-fast);
        }
        .filter-group select:focus {
            outline: none;
            border-color: var(--color-secondary);
        }
        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background-color: var(--color-bg-card);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
        }
        .filter-btn:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            background-color: var(--color-bg-alt);
        }
        .filter-btn.active {
            border-color: var(--color-secondary);
            color: var(--color-bg-card);
            background-color: var(--color-secondary);
        }
        .result-count {
            font-size: 0.82rem;
            color: var(--color-text-faint);
            white-space: nowrap;
        }
        /* ========== CARD GRID ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 24px;
        }
        .match-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
        }
        .match-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-border-strong);
        }
        .match-card .card-img-wrap {
            position: relative;
            padding-top: 56.25%;
            overflow: hidden;
            background-color: var(--color-bg-alt);
        }
        .match-card .card-img-wrap img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .match-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .match-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }
        .match-card .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .match-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            letter-spacing: 0.2px;
            color: var(--color-text);
        }
        .match-card .card-body p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .match-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }
        .match-card .card-meta time {
            font-size: 0.78rem;
            color: var(--color-text-faint);
            font-family: var(--font-mono);
        }
        .match-card .btn-text {
            font-size: 0.8rem;
        }
        /* ========== HOT SECTION ========== */
        .hot-section {
            background-color: var(--color-secondary);
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            margin-top: 8px;
        }
        .hot-section .section-title {
            color: var(--color-text-inverse);
            margin-bottom: 20px;
        }
        .hot-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 14px;
            background-color: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 14px 16px;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-mid);
            cursor: pointer;
        }
        .hot-item:hover {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: rgba(212, 255, 0, 0.3);
            transform: translateX(4px);
        }
        .hot-item .hot-rank {
            font-family: var(--font-mono);
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary);
            width: 40px;
            text-align: center;
            flex-shrink: 0;
        }
        .hot-item .hot-info h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-inverse);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .hot-item .hot-info span {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.55);
        }
        /* ========== EXTEND BLOCK ========== */
        .extend-block {
            background-color: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            gap: 32px;
            align-items: flex-start;
            border-left: 4px solid var(--color-primary);
        }
        .extend-block .extend-icon {
            font-size: 2.2rem;
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .extend-block .extend-text h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
        }
        .extend-block .extend-text p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }
        /* ========== STATS BAR ========== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            box-shadow: var(--shadow-sm);
        }
        .stat-cell {
            text-align: center;
            padding: 8px 12px;
            border-right: 1px solid var(--color-border);
        }
        .stat-cell:last-child {
            border-right: none;
        }
        .stat-cell .stat-num {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-secondary);
            line-height: 1.2;
        }
        .stat-cell .stat-num .unit {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-text-faint);
            margin-left: 2px;
        }
        .stat-cell .stat-label {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-top: 6px;
            font-weight: 500;
        }
        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-mid);
        }
        .faq-item:hover {
            border-color: var(--color-border-strong);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--color-text);
            transition: background-color var(--transition-fast);
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.4rem;
            font-weight: 400;
            color: var(--color-text-faint);
            line-height: 1;
            transition: transform var(--transition-fast);
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item summary:hover {
            background-color: var(--color-bg-alt);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        .faq-item[open] .faq-answer {
            animation: fadeIn 200ms ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-4px); }
            to { opacity: 1; transform: translateY(0); }
        }
        /* ========== CTA SHORT ========== */
        .cta-short {
            background-color: var(--color-secondary);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-short .cta-text h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-inverse);
            margin-bottom: 6px;
        }
        .cta-short .cta-text p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
        }
        /* ========== FOOTER ========== */
        .site-footer {
            background-color: var(--color-secondary);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 24px 24px;
            border-top: 2px solid var(--color-primary);
        }
        .site-footer .footer-grid {
            max-width: var(--container-max);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 32px;
            padding-bottom: 32px;
        }
        .site-footer .footer-brand .brand-logo {
            color: var(--color-text-inverse);
            margin-bottom: 12px;
        }
        .site-footer .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .site-footer .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-text-inverse);
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul li a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }
        .site-footer .footer-subscribe h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-text-inverse);
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .site-footer .footer-subscribe p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }
        .footer-subscribe-form input {
            flex: 1;
            height: 40px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
            transition: border-color var(--transition-fast);
        }
        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-subscribe-form input:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .footer-subscribe-form .btn-sm {
            height: 40px;
            padding: 0 16px;
        }
        .footer-bottom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        /* ========== MOBILE OVERLAY ========== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.4);
            z-index: 850;
            opacity: 0;
            transition: opacity var(--transition-mid);
        }
        .sidebar-overlay.visible {
            display: block;
            opacity: 1;
        }
        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stats-strip {
                grid-template-columns: repeat(4, 1fr);
            }
            .hot-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 900px) {
            .header-search {
                max-width: 240px;
                margin: 0 12px;
            }
            .header-controls select {
                font-size: 0.78rem;
                padding: 0 20px 0 8px;
            }
            .main-content {
                padding: 0 16px 40px;
            }
            .doc-sidebar {
                width: 248px;
            }
            :root {
                --sidebar-width: 248px;
            }
        }
        @media (max-width: 768px) {
            .doc-sidebar {
                transform: translateX(-100%);
                width: min(280px, 85vw);
                box-shadow: var(--shadow-hover);
                z-index: 950;
            }
            .doc-sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
                max-width: 100%;
                padding: 0 16px 32px;
            }
            .hamburger-btn {
                display: block;
            }
            .header-search {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                max-width: 100%;
                margin: 0;
                padding: 12px 16px;
                background-color: var(--color-secondary);
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .header-search.expanded {
                display: block;
            }
            .header-controls select {
                display: none;
            }
            .mobile-search-btn {
                display: block;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .hot-grid {
                grid-template-columns: 1fr;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-cell {
                border-right: none;
                border-bottom: 1px solid var(--color-border);
            }
            .stat-cell:nth-child(3) {
                border-bottom: none;
            }
            .stat-cell:nth-child(4) {
                border-bottom: none;
            }
            .extend-block {
                flex-direction: column;
                gap: 16px;
                padding: 20px;
            }
            .cta-short {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .page-header h1 {
                font-size: 1.8rem;
            }
            .filter-bar {
                align-items: flex-start;
            }
            .filter-group {
                width: 100%;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .site-header {
                padding: 0 12px;
            }
            .brand-logo {
                font-size: 1.05rem;
            }
            .brand-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 0.9rem;
            }
            .page-header {
                padding: 28px 0 16px;
            }
            .page-header h1 {
                font-size: 1.5rem;
            }
            .section {
                padding: 32px 0;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .site-footer {
                padding: 32px 16px 20px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                padding: 16px;
            }
            .stat-cell .stat-num {
                font-size: 1.5rem;
            }
            .hot-section {
                padding: 20px 16px;
            }
            .hot-item .hot-rank {
                font-size: 1.3rem;
                width: 32px;
            }
            .filter-group select {
                flex: 1;
                min-width: 0;
            }
            .footer-subscribe-form {
                flex-direction: column;
            }
            .footer-subscribe-form .btn-sm {
                width: 100%;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #D4FF00;
            --color-primary-hover: #BFE600;
            --color-primary-soft: rgba(212, 255, 0, 0.12);
            --color-secondary: #1A1A1A;
            --color-secondary-light: #2A2A2A;
            --color-secondary-mid: #3A3A3A;
            --color-bg: #FAFAF7;
            --color-bg-alt: #F0F0EA;
            --color-bg-card: #FFFFFF;
            --color-text: #1A1A1A;
            --color-text-inverse: #FAFAF7;
            --color-text-muted: #666666;
            --color-text-faint: #999999;
            --color-border: #E5E5E0;
            --color-border-strong: #D0D0C8;
            --color-accent: #FF3B30;
            --color-accent-soft: rgba(255, 59, 48, 0.10);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 10px;
            --radius-xl: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-mid: 200ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", "Menlo", "Consolas", "PingFang SC", monospace;
            --header-height: 68px;
            --sidebar-width: 272px;
            --container-max: 1280px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 0.95rem;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: var(--header-height);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: all var(--transition-fast);
            padding: 10px 22px;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: var(--color-secondary);
            border: none;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--color-primary-hover);
            color: var(--color-secondary);
            box-shadow: 0 4px 12px rgba(212, 255, 0, 0.35);
            transform: translateY(-1px);
        }
        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--color-text-inverse);
            background: transparent;
        }
        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-sm {
            padding: 6px 14px;
            font-size: 0.82rem;
            border-radius: var(--radius-sm);
        }
        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
            border: none;
        }
        .btn-accent:hover,
        .btn-accent:focus {
            background-color: #d63026;
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 59, 48, 0.3);
        }

        /* ========== HEADER ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: var(--color-secondary);
            z-index: 1040;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            border-bottom: 2px solid var(--color-primary);
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--color-text-inverse);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-size: 1.1rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .header-search {
            flex: 1;
            max-width: 480px;
            margin: 0 24px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            height: 40px;
            padding: 0 40px 0 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.9rem;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
        }
        .header-search input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .header-search input:focus {
            outline: none;
            border-color: var(--color-primary);
            background-color: rgba(255, 255, 255, 0.12);
        }
        .header-search .search-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .header-controls {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-controls select {
            height: 40px;
            padding: 0 28px 0 12px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            transition: border-color var(--transition-fast);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='white' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
        }
        .header-controls select:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .hamburger-btn {
            display: none;
            color: var(--color-text-inverse);
            font-size: 1.4rem;
            line-height: 1;
            padding: 6px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast);
        }
        .hamburger-btn:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .mobile-search-btn {
            display: none;
            color: var(--color-text-inverse);
            font-size: 1.2rem;
            padding: 6px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast);
        }
        .mobile-search-btn:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        /* ========== SIDEBAR ========== */
        .layout-wrapper {
            display: flex;
            min-height: calc(100vh - var(--header-height));
            position: relative;
        }
        .sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            background-color: var(--color-bg-alt);
            border-right: 1px solid var(--color-border);
            padding: 24px 16px;
            position: sticky;
            top: var(--header-height);
            height: calc(100vh - var(--header-height));
            overflow-y: auto;
            z-index: 900;
            transition: transform var(--transition-mid);
        }
        .sidebar-title {
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--color-text-faint);
            margin-bottom: 16px;
            padding-left: 8px;
        }
        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-nav li {
            margin-bottom: 2px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text);
            position: relative;
            transition: all var(--transition-fast);
        }
        .sidebar-nav a .nav-indicator {
            width: 3px;
            height: 18px;
            background-color: transparent;
            border-radius: 2px;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .sidebar-nav a:hover {
            background-color: var(--color-bg-card);
            color: var(--color-text);
        }
        .sidebar-nav a:hover .nav-indicator {
            background-color: var(--color-text-faint);
        }
        .sidebar-nav a.active {
            background-color: var(--color-bg-card);
            color: var(--color-secondary);
            font-weight: 700;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-nav a.active .nav-indicator {
            background-color: var(--color-primary);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            flex-shrink: 0;
        }
        .sidebar-nav a.active .nav-icon {
            color: var(--color-secondary);
        }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            flex: 1;
            padding: 32px 32px 60px;
            max-width: calc(100% - var(--sidebar-width));
            min-width: 0;
        }

        /* Category Page Header */
        .category-header {
            padding: 24px 0 32px;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 32px;
        }
        .category-header .breadcrumb {
            margin-bottom: 12px;
            font-size: 0.8rem;
            color: var(--color-text-faint);
        }
        .category-header .breadcrumb a {
            color: var(--color-text-muted);
        }
        .category-header .breadcrumb a:hover {
            color: var(--color-primary-hover);
        }
        .category-header h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--color-secondary);
        }
        .category-header .category-subtitle {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.8;
        }

        /* Filter Bar */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            padding: 16px 0;
            margin-bottom: 24px;
            border-bottom: 1px solid var(--color-border);
        }
        .filter-group {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .filter-chip {
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            border: 1px solid var(--color-border-strong);
            background-color: var(--color-bg-card);
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .filter-chip:hover {
            border-color: var(--color-primary);
            color: var(--color-secondary);
        }
        .filter-chip.active {
            background-color: var(--color-secondary);
            color: var(--color-primary);
            border-color: var(--color-secondary);
        }
        .filter-sort {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .filter-sort select {
            padding: 6px 28px 6px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-strong);
            background-color: var(--color-bg-card);
            font-size: 0.85rem;
            color: var(--color-text);
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23666' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
        }
        .view-toggle {
            display: flex;
            gap: 4px;
            border: 1px solid var(--color-border-strong);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .view-toggle button {
            padding: 6px 12px;
            font-size: 0.85rem;
            background-color: var(--color-bg-card);
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }
        .view-toggle button:hover {
            background-color: var(--color-bg-alt);
        }
        .view-toggle button.active {
            background-color: var(--color-secondary);
            color: var(--color-primary);
        }

        /* Schedule Cards Grid */
        .schedule-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .schedule-grid.three-col {
            grid-template-columns: repeat(3, 1fr);
        }
        .schedule-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-mid);
            display: flex;
            flex-direction: column;
        }
        .schedule-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--color-border-strong);
        }
        .schedule-card .card-image {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--color-bg-alt);
        }
        .schedule-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .schedule-card:hover .card-image img {
            transform: scale(1.03);
        }
        .schedule-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: var(--color-secondary);
            color: var(--color-primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            z-index: 2;
        }
        .schedule-card .card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .schedule-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--color-secondary);
            transition: color var(--transition-fast);
        }
        .schedule-card:hover .card-title {
            color: var(--color-primary-hover);
        }
        .schedule-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .schedule-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--color-text-faint);
            border-top: 1px solid var(--color-border);
            padding-top: 12px;
        }
        .schedule-card .read-btn {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-secondary);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            background-color: var(--color-primary-soft);
            transition: all var(--transition-fast);
        }
        .schedule-card .read-btn:hover {
            background-color: var(--color-primary);
            color: var(--color-secondary);
        }

        /* Hot Section */
        .hot-section {
            margin: 40px 0;
        }
        .hot-section .section-heading {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
        }
        .hot-section .section-heading h2 {
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0;
            color: var(--color-secondary);
        }
        .hot-section .section-heading .hot-badge {
            background-color: var(--color-accent);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .hot-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }
        .hot-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 14px;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .hot-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .hot-card .hot-tag {
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .hot-card .hot-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-secondary);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .hot-card .hot-time {
            font-size: 0.75rem;
            color: var(--color-text-faint);
        }

        /* Category Description */
        .category-description {
            background-color: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            padding: 32px;
            margin: 40px 0;
            border-left: 4px solid var(--color-primary);
        }
        .category-description h2 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--color-secondary);
        }
        .category-description p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 10px;
        }
        .category-description p:last-child {
            margin-bottom: 0;
        }

        /* Stats Bar */
        .stats-bar {
            background-color: var(--color-secondary);
            border-radius: var(--radius-lg);
            padding: 24px 32px;
            margin: 40px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .stats-bar .stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .stats-bar .stat-number {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
        }
        .stats-bar .stat-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.3;
        }
        .stats-bar .stat-divider {
            width: 1px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.15);
        }

        /* FAQ */
        .faq-section {
            margin: 40px 0;
        }
        .faq-section h2 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--color-secondary);
        }
        .faq-list .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            background-color: var(--color-bg-card);
        }
        .faq-list .faq-question {
            padding: 16px 20px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--color-secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background-color var(--transition-fast);
        }
        .faq-list .faq-question:hover {
            background-color: var(--color-bg-alt);
        }
        .faq-list .faq-question .faq-icon {
            transition: transform var(--transition-fast);
            color: var(--color-text-faint);
            flex-shrink: 0;
        }
        .faq-list .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--color-primary-hover);
        }
        .faq-list .faq-answer {
            padding: 0 20px 16px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-list .faq-item.open .faq-answer {
            display: block;
        }

        /* Convert Block */
        .convert-block {
            background-color: var(--color-secondary);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            margin: 40px 0 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .convert-block .convert-text {
            color: var(--color-text-inverse);
            font-size: 0.95rem;
            font-weight: 500;
        }
        .convert-block .convert-text strong {
            color: var(--color-primary);
        }
        .convert-block .convert-btn {
            flex-shrink: 0;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background-color: var(--color-secondary);
            color: var(--color-text-inverse);
            padding: 48px 0 24px;
            margin-top: 0;
            border-top: 2px solid var(--color-primary);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding: 0 24px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .site-footer .footer-brand .brand-logo {
            color: var(--color-text-inverse);
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .site-footer .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.8px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-col ul a:hover {
            color: var(--color-primary);
        }
        .site-footer .footer-subscribe h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.8px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .site-footer .footer-subscribe p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 14px;
        }
        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }
        .footer-subscribe-form input {
            flex: 1;
            height: 40px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
        }
        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-subscribe-form input:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .footer-bottom {
            max-width: var(--container-max);
            margin: 32px auto 0;
            padding: 16px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Sidebar Overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 850;
            opacity: 0;
            transition: opacity var(--transition-mid);
        }
        .sidebar-overlay.visible {
            opacity: 1;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .main-content {
                padding: 24px 20px 40px;
            }
            .sidebar {
                width: 240px;
            }
            :root {
                --sidebar-width: 240px;
            }
            .schedule-grid.three-col {
                grid-template-columns: repeat(2, 1fr);
            }
            .hot-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --sidebar-width: 260px;
            }
            body {
                padding-top: var(--header-height);
            }
            .site-header {
                padding: 0 16px;
                height: var(--header-height);
            }
            .hamburger-btn {
                display: block;
            }
            .mobile-search-btn {
                display: block;
            }
            .header-search {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                margin: 0;
                padding: 10px 16px;
                background-color: var(--color-secondary);
                max-width: none;
                z-index: 1001;
                border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            }
            .header-search.visible {
                display: block;
            }
            .header-controls select {
                display: none;
            }
            .sidebar {
                position: fixed;
                top: var(--header-height);
                left: 0;
                bottom: 0;
                width: 260px;
                height: auto;
                transform: translateX(-100%);
                z-index: 950;
                border-right: 1px solid var(--color-border);
                box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
                transition: transform var(--transition-mid);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }
            .sidebar-overlay.visible {
                pointer-events: auto;
                opacity: 1;
            }
            .main-content {
                padding: 16px 16px 32px;
                max-width: 100%;
            }
            .category-header h1 {
                font-size: 1.7rem;
            }
            .category-header .category-subtitle {
                font-size: 0.9rem;
            }
            .schedule-grid {
                grid-template-columns: 1fr;
            }
            .schedule-grid.three-col {
                grid-template-columns: 1fr;
            }
            .hot-list {
                grid-template-columns: 1fr;
            }
            .filter-sort {
                margin-left: 0;
                flex-wrap: wrap;
            }
            .stats-bar {
                padding: 20px;
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .stats-bar .stat-divider {
                display: none;
            }
            .category-description {
                padding: 20px;
                margin: 24px 0;
            }
            .convert-block {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .site-footer {
                padding: 32px 0 16px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                padding: 0 16px;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 12px 16px 0;
            }
        }
        @media (max-width: 520px) {
            .brand-logo {
                font-size: 1.05rem;
            }
            .brand-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 0.9rem;
            }
            .filter-chip {
                padding: 5px 12px;
                font-size: 0.75rem;
            }
            .schedule-card .card-title {
                font-size: 0.95rem;
            }
            .stats-bar .stat-number {
                font-size: 1.6rem;
            }
            .category-header h1 {
                font-size: 1.45rem;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #D4FF00;
            --color-primary-hover: #BFE600;
            --color-primary-soft: rgba(212, 255, 0, 0.12);
            --color-secondary: #1A1A1A;
            --color-secondary-light: #2A2A2A;
            --color-secondary-mid: #3A3A3A;
            --color-bg: #FAFAF7;
            --color-bg-alt: #F0F0EA;
            --color-bg-card: #FFFFFF;
            --color-text: #1A1A1A;
            --color-text-inverse: #FAFAF7;
            --color-text-muted: #666666;
            --color-text-faint: #999999;
            --color-border: #E5E5E0;
            --color-border-strong: #D0D0C8;
            --color-accent: #FF3B30;
            --color-accent-soft: rgba(255, 59, 48, 0.10);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 10px;
            --radius-xl: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-mid: 200ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", "Menlo", "Consolas", "PingFang SC", monospace;
            --header-height: 60px;
            --sidebar-width: 272px;
            --container-max: 1280px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 0.95rem;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ========== HEADER ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: var(--color-secondary);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            border-bottom: 2px solid var(--color-primary);
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--color-text-inverse);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-size: 1.1rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .header-search {
            flex: 1;
            max-width: 480px;
            margin: 0 24px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            height: 40px;
            padding: 0 40px 0 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.9rem;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
        }
        .header-search input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .header-search input:focus {
            outline: none;
            border-color: var(--color-primary);
            background-color: rgba(255, 255, 255, 0.12);
        }
        .header-search .search-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            pointer-events: none;
        }
        .header-controls {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-controls select {
            height: 40px;
            padding: 0 28px 0 12px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23FAFAF7' stroke-width='1.5'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
        }
        .header-controls select:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: var(--color-text-inverse);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            transition: color var(--transition-fast);
        }
        .hamburger-btn:hover {
            color: var(--color-primary);
        }
        .mobile-search-btn {
            display: none;
            background: none;
            border: none;
            color: var(--color-text-inverse);
            font-size: 1.2rem;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            transition: color var(--transition-fast);
        }
        .mobile-search-btn:hover {
            color: var(--color-primary);
        }
        /* ========== SIDEBAR (文档侧栏) ========== */
        .sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background-color: var(--color-bg-card);
            border-right: 1px solid var(--color-border);
            z-index: 900;
            overflow-y: auto;
            padding: 28px 16px 32px;
            transition: transform var(--transition-slow);
        }
        .sidebar-title {
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--color-text-faint);
            margin-bottom: 20px;
            padding-left: 12px;
        }
        .sidebar-nav {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .sidebar-nav>li {
            margin: 0;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--color-text-muted);
            position: relative;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .sidebar-nav a::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%) scaleY(0);
            width: 3px;
            height: 22px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: transform var(--transition-mid);
        }
        .sidebar-nav a:hover {
            background-color: var(--color-bg-alt);
            color: var(--color-text);
        }
        .sidebar-nav a.active {
            background-color: var(--color-primary-soft);
            color: var(--color-text);
            font-weight: 600;
        }
        .sidebar-nav a.active::before {
            transform: translateY(-50%) scaleY(1);
        }
        .sidebar-subtitle {
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: var(--color-text-faint);
            margin: 20px 12px 8px;
        }
        .sidebar-sub-nav {
            list-style: none;
            padding-left: 12px;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .sidebar-sub-nav a {
            font-size: 0.82rem;
            color: var(--color-text-faint);
            padding: 6px 12px;
            display: block;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .sidebar-sub-nav a:hover {
            background-color: var(--color-bg-alt);
            color: var(--color-text);
        }
        .sidebar-mask {
            display: none;
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.4);
            z-index: 850;
            opacity: 0;
            transition: opacity var(--transition-slow);
        }
        .sidebar-mask.visible {
            display: block;
            opacity: 1;
        }
        /* ========== MAIN CONTENT ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            padding-top: var(--header-height);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .page-body {
            flex: 1;
            padding: 0 28px 80px;
            max-width: 1000px;
        }
        /* ========== BREADCRUMB ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--color-text-faint);
            margin: 28px 0 12px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary-hover);
        }
        .breadcrumb .separator {
            color: var(--color-text-faint);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }
        /* ========== PAGE HERO (分类页降级版) ========== */
        .category-hero {
            padding: 28px 0 32px;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 32px;
        }
        .category-hero h1 {
            font-size: 2.2rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .category-hero h1 .highlight {
            color: var(--color-primary);
            background-color: var(--color-secondary);
            padding: 2px 8px;
            border-radius: 4px;
            display: inline-block;
            font-size: 1.1rem;
            vertical-align: middle;
            margin-left: 6px;
        }
        .category-hero-desc {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.8;
        }
        /* ========== FILTER BAR ========== */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            margin-bottom: 28px;
            box-shadow: var(--shadow-sm);
        }
        .filter-label {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--color-text-faint);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            flex: 1;
        }
        .filter-tag {
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            background-color: var(--color-bg-alt);
            color: var(--color-text-muted);
            border: 1px solid transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--color-border-strong);
            color: var(--color-text);
        }
        .filter-tag.active {
            background-color: var(--color-secondary);
            color: var(--color-primary);
            border-color: var(--color-secondary);
            font-weight: 600;
        }
        .filter-sort {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .filter-sort select {
            padding: 7px 28px 7px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-strong);
            background-color: var(--color-bg);
            color: var(--color-text);
            font-size: 0.82rem;
            cursor: pointer;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23666666' stroke-width='1.5'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 10px center;
            transition: border-color var(--transition-fast);
        }
        .filter-sort select:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .view-toggle {
            display: flex;
            gap: 4px;
            background-color: var(--color-bg-alt);
            border-radius: var(--radius-sm);
            padding: 3px;
        }
        .view-toggle button {
            padding: 6px 10px;
            border-radius: 4px;
            font-size: 0.75rem;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            line-height: 1;
        }
        .view-toggle button.active {
            background-color: var(--color-bg-card);
            color: var(--color-text);
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }
        .view-toggle button:hover:not(.active) {
            color: var(--color-text);
        }
        /* ========== ARTICLE GRID ========== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 48px;
        }
        .article-card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
            box-shadow: var(--shadow-sm);
        }
        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-primary);
        }
        .article-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
            background-color: var(--color-bg-alt);
        }
        .article-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-img img {
            transform: scale(1.04);
        }
        .article-card-body {
            padding: 18px 18px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
            background-color: var(--color-primary-soft);
            color: var(--color-text);
            letter-spacing: 0.5px;
            margin-bottom: 10px;
            white-space: nowrap;
        }
        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.45;
            color: var(--color-text);
            margin-bottom: 10px;
            transition: color var(--transition-fast);
        }
        .article-card:hover .article-card-title {
            color: var(--color-primary-hover);
        }
        .article-card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
            font-size: 0.78rem;
            color: var(--color-text-faint);
        }
        .article-card-read {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-text);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border-strong);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .article-card-read:hover {
            background-color: var(--color-secondary);
            color: var(--color-primary);
            border-color: var(--color-secondary);
        }
        /* ========== HOT ARTICLES ========== */
        .hot-section {
            margin-bottom: 48px;
        }
        .hot-section-title {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .hot-section-title::before {
            content: '';
            width: 4px;
            height: 22px;
            background-color: var(--color-primary);
            border-radius: 3px;
        }
        .hot-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .hot-item {
            display: flex;
            gap: 14px;
            padding: 16px 18px;
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            align-items: center;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
        }
        .hot-item:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .hot-rank {
            font-family: var(--font-mono);
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--color-primary);
            background-color: var(--color-secondary);
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            line-height: 1;
        }
        .hot-item-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .hot-item-content p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }
        /* ========== CATEGORY EXPLAIN ========== */
        .explain-section {
            background-color: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            margin-bottom: 48px;
            border-left: 4px solid var(--color-primary);
        }
        .explain-section h2 {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 14px;
        }
        .explain-section p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 10px;
        }
        .explain-section p:last-child {
            margin-bottom: 0;
        }
        /* ========== STATS STRIP ========== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            background-color: var(--color-secondary);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            margin-bottom: 48px;
        }
        .stats-strip-item {
            text-align: center;
            padding: 8px 4px;
        }
        .stats-strip-number {
            font-family: var(--font-mono);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            display: block;
        }
        .stats-strip-number .unit {
            font-size: 0.9rem;
            font-weight: 600;
            color: rgba(250, 250, 247, 0.6);
            margin-left: 2px;
        }
        .stats-strip-label {
            font-size: 0.8rem;
            color: rgba(250, 250, 247, 0.55);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }
        /* ========== FAQ ========== */
        .faq-section {
            margin-bottom: 48px;
        }
        .faq-section h2 {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-section h2::before {
            content: '';
            width: 4px;
            height: 22px;
            background-color: var(--color-primary);
            border-radius: 3px;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border-strong);
        }
        .faq-item summary {
            padding: 16px 20px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.3rem;
            font-weight: 300;
            color: var(--color-text-faint);
            transition: transform var(--transition-mid);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 4px 20px 18px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        /* ========== CONVERT SHORT ========== */
        .convert-short {
            background-color: var(--color-secondary);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .convert-short-text {
            flex: 1;
            min-width: 200px;
        }
        .convert-short-text h3 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-text-inverse);
            margin-bottom: 6px;
        }
        .convert-short-text p {
            font-size: 0.85rem;
            color: rgba(250, 250, 247, 0.6);
            line-height: 1.6;
        }
        .convert-short-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }
        .convert-short-form input {
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.85rem;
            width: 220px;
            transition: border-color var(--transition-fast);
        }
        .convert-short-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .convert-short-form input:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .btn-primary {
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            background-color: var(--color-primary);
            color: var(--color-secondary);
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.3px;
            transition: background-color var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            transform: translateY(-1px);
        }
        .btn-primary:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        /* ========== FOOTER ========== */
        .site-footer {
            background-color: var(--color-secondary);
            color: rgba(250, 250, 247, 0.75);
            padding: 48px 24px 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .footer-brand .brand-logo {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.82rem;
            line-height: 1.7;
            color: rgba(250, 250, 247, 0.55);
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-text-inverse);
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 0.82rem;
            color: rgba(250, 250, 247, 0.55);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-primary);
        }
        .footer-subscribe h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-text-inverse);
            margin-bottom: 8px;
        }
        .footer-subscribe p {
            font-size: 0.8rem;
            color: rgba(250, 250, 247, 0.5);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }
        .footer-subscribe-form input {
            flex: 1;
            padding: 9px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.82rem;
            transition: border-color var(--transition-fast);
            min-width: 0;
        }
        .footer-subscribe-form input:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .btn-sm {
            padding: 9px 16px;
            font-size: 0.8rem;
            border-radius: var(--radius-sm);
            white-space: nowrap;
        }
        .footer-bottom {
            max-width: var(--container-max);
            margin: 32px auto 0;
            padding-top: 18px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.78rem;
            color: rgba(250, 250, 247, 0.4);
        }
        .footer-bottom a {
            color: rgba(250, 250, 247, 0.4);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        /* ========== MOBILE SEARCH OVERLAY ========== */
        .mobile-search-panel {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--color-secondary);
            padding: 16px 24px;
            z-index: 990;
            border-bottom: 2px solid var(--color-primary);
        }
        .mobile-search-panel.visible {
            display: block;
        }
        .mobile-search-panel input {
            width: 100%;
            height: 42px;
            padding: 0 40px 0 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-text-inverse);
            font-size: 0.9rem;
        }
        .mobile-search-panel input:focus {
            outline: none;
            border-color: var(--color-primary);
        }
        .mobile-search-panel input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }
        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
                padding: 20px 16px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 56px;
                --sidebar-width: 260px;
            }
            .site-header {
                padding: 0 14px;
            }
            .header-search {
                display: none;
            }
            .header-controls select {
                display: none;
            }
            .hamburger-btn {
                display: block;
            }
            .mobile-search-btn {
                display: block;
            }
            .brand-logo {
                font-size: 1.1rem;
            }
            .brand-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 0.95rem;
            }
            .sidebar {
                transform: translateX(-100%);
                width: var(--sidebar-width);
                box-shadow: 4px 0 20px rgba(0, 0, 0, 0.12);
                z-index: 920;
                top: var(--header-height);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-mask.visible {
                display: block;
                opacity: 1;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--header-height);
            }
            .page-body {
                padding: 0 16px 56px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .hot-list {
                grid-template-columns: 1fr;
            }
            .explain-section {
                padding: 22px 20px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                padding: 16px 12px;
            }
            .stats-strip-number {
                font-size: 1.7rem;
            }
            .convert-short {
                flex-direction: column;
                align-items: stretch;
                padding: 20px 18px;
                gap: 14px;
            }
            .convert-short-form input {
                width: 100%;
            }
            .convert-short-form {
                flex-direction: column;
            }
            .convert-short-form .btn-primary {
                width: 100%;
                text-align: center;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 12px 14px;
            }
            .filter-sort {
                width: 100%;
                flex-wrap: wrap;
            }
            .filter-tags {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }
        @media (max-width: 520px) {
            .stats-strip {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .article-card-excerpt {
                font-size: 0.85rem;
            }
            .category-hero h1 {
                font-size: 1.35rem;
            }
            .category-hero-desc {
                font-size: 0.88rem;
            }
            .explain-section h2 {
                font-size: 1.15rem;
            }
            .hot-rank {
                width: 36px;
                height: 36px;
                font-size: 1.4rem;
            }
            .hot-item {
                padding: 12px 14px;
                gap: 10px;
            }
            .filter-tag {
                padding: 5px 10px;
                font-size: 0.75rem;
            }
            .sidemenu-btn {
                padding: 10px;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}