/* roulang page: index */
:root {
            --brand-500: #2f988f;
            --brand-600: #257a74;
            --brand-700: #21625e;
            --brand-900: #1d4240;
            --brand-950: #0b2524;
            --gold-300: #e7c064;
            --gold-400: #dfa93e;
            --gold-500: #d49028;
            --gold-600: #bb6f20;
            --ink-50: #f6f7f9;
            --ink-100: #eceef2;
            --ink-200: #d4d9e2;
            --ink-300: #adb7c9;
            --ink-500: #617391;
            --ink-700: #404a62;
            --ink-800: #383f53;
            --ink-900: #1e2332;
            --ink-950: #141824;
            --bg-dark: #0b0f1a;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.14);
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-xl2: 1.5rem;
            --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 260ms cubic-bezier(0.4, 0, 0.2, 1);
            --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 6px 24px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.12), 0 16px 48px rgba(0,0,0,0.10);
            --shadow-gold: 0 0 40px rgba(223,169,62,0.25);
        }

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

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

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--gold-300);
        }

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--gold-400);
            outline-offset: 2px;
        }

        ::selection {
            background-color: rgba(223, 169, 62, 0.35);
            color: #fff;
        }

        /* Custom scrollbar for horizontal tracks */
        .scroll-track {
            scrollbar-width: thin;
            scrollbar-color: rgba(223, 169, 62, 0.5) rgba(255, 255, 255, 0.05);
        }
        .scroll-track::-webkit-scrollbar {
            height: 6px;
        }
        .scroll-track::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 99px;
        }
        .scroll-track::-webkit-scrollbar-thumb {
            background: rgba(223, 169, 62, 0.45);
            border-radius: 99px;
        }
        .scroll-track::-webkit-scrollbar-thumb:hover {
            background: rgba(223, 169, 62, 0.65);
        }

        /* Gradient text */
        .text-gradient-gold {
            background: linear-gradient(135deg, #f5d67b 0%, #dfa93e 35%, #d49028 65%, #f0d999 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        /* Hero background overlay */
        .hero-bg-overlay {
            background:
                linear-gradient(180deg, rgba(11, 15, 26, 0.72) 0%, rgba(11, 15, 26, 0.88) 55%, rgba(11, 15, 26, 0.97) 100%),
                radial-gradient(ellipse at 50% 30%, rgba(47, 152, 143, 0.28) 0%, transparent 65%);
        }

        /* Card base */
        .card-base {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
        }
        .card-base:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        /* Report card specific */
        .report-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl2);
            overflow: hidden;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            flex-shrink: 0;
        }
        .report-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(223, 169, 62, 0.4);
        }

        /* Badge */
        .badge-gold {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.25rem 0.75rem;
            background: rgba(223, 169, 62, 0.12);
            border: 1px solid rgba(223, 169, 62, 0.35);
            border-radius: 99px;
            color: #f0d999;
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        .badge-brand {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.25rem 0.75rem;
            background: rgba(47, 152, 143, 0.12);
            border: 1px solid rgba(47, 152, 143, 0.35);
            border-radius: 99px;
            color: #7ed0c5;
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        /* Search box */
        .search-box {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 99px;
            padding: 0.5rem 0.5rem 0.5rem 1.25rem;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: border-color var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
        }
        .search-box:focus-within {
            border-color: rgba(223, 169, 62, 0.6);
            box-shadow: 0 0 0 4px rgba(223, 169, 62, 0.12);
            background: rgba(255, 255, 255, 0.09);
        }
        .search-box input {
            flex: 1;
            min-width: 0;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 1rem;
            line-height: 1.5;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            background: linear-gradient(135deg, #dfa93e, #d49028);
            border: none;
            border-radius: 99px;
            color: #1e1e1e;
            font-weight: 600;
            font-size: 0.875rem;
            cursor: pointer;
            transition: transform var(--transition-fast), box-shadow var(--transition-base), filter var(--transition-fast);
            white-space: nowrap;
        }
        .search-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(223, 169, 62, 0.3);
            filter: brightness(1.05);
        }
        .search-btn:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        /* Quick category chip */
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.25rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 99px;
            color: var(--text-secondary);
            font-size: 0.875rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .chip:hover {
            background: rgba(223, 169, 62, 0.12);
            border-color: rgba(223, 169, 62, 0.45);
            color: #f0d999;
            transform: translateY(-1px);
        }

        /* Stat block */
        .stat-block {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            text-align: center;
            transition: background-color var(--transition-base), border-color var(--transition-base);
        }
        .stat-block:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-strong);
        }

        /* Navigation links */
        .nav-link {
            position: relative;
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition-fast), background-color var(--transition-fast);
        }
        .nav-link:hover {
            color: #f0d999;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-link.active {
            color: #f0d999;
            background: rgba(223, 169, 62, 0.1);
            border: 1px solid rgba(223, 169, 62, 0.3);
        }

        /* FAQ details */
        details.faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: border-color var(--transition-base), background-color var(--transition-base);
        }
        details.faq-item:hover {
            border-color: var(--border-strong);
        }
        details.faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            user-select: none;
            transition: color var(--transition-fast);
        }
        details.faq-item summary::-webkit-details-marker {
            display: none;
        }
        details.faq-item summary:hover {
            color: #f0d999;
        }
        details.faq-item summary .faq-icon {
            transition: transform var(--transition-base);
            color: var(--text-muted);
            font-size: 0.875rem;
        }
        details.faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
            color: var(--gold-400);
        }
        details.faq-item .faq-body {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.8;
        }

        /* Form elements */
        .form-input {
            width: 100%;
            padding: 0.8rem 1.1rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 0.75rem;
            color: var(--text-primary);
            font-size: 0.9375rem;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
            outline: none;
        }
        .form-input::placeholder {
            color: var(--text-muted);
        }
        .form-input:focus {
            border-color: rgba(223, 169, 62, 0.55);
            box-shadow: 0 0 0 4px rgba(223, 169, 62, 0.1);
            background: rgba(255, 255, 255, 0.08);
        }

        .form-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.8rem 1.8rem;
            background: linear-gradient(135deg, #dfa93e, #d49028);
            border: none;
            border-radius: 99px;
            color: #1e1e1e;
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            transition: transform var(--transition-fast), box-shadow var(--transition-base), filter var(--transition-fast);
            white-space: nowrap;
        }
        .form-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(223, 169, 62, 0.28);
            filter: brightness(1.05);
        }
        .form-btn:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        /* Timeline */
        .timeline-item {
            position: relative;
            padding-left: 2.5rem;
            padding-bottom: 2rem;
            border-left: 2px solid rgba(223, 169, 62, 0.3);
            margin-left: 0.75rem;
        }
        .timeline-item:last-child {
            border-left-color: transparent;
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -0.5rem;
            top: 0.25rem;
            width: 0.8rem;
            height: 0.8rem;
            background: #dfa93e;
            border-radius: 99px;
            box-shadow: 0 0 0 4px rgba(223, 169, 62, 0.2);
        }

        /* Horizontal snap track */
        .snap-track {
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .snap-track > * {
            scroll-snap-align: start;
        }

        /* Mobile nav */
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .nav-mobile-toggle {
                display: flex;
            }
            body {
                font-size: 15px;
            }
        }
        @media (min-width: 769px) {
            .nav-mobile-toggle {
                display: none;
            }
            .nav-mobile-menu {
                display: none !important;
            }
        }

        /* Hero responsive adjustments */
        @media (max-width: 640px) {
            .search-box {
                border-radius: 1rem;
                flex-wrap: wrap;
                padding: 0.75rem;
            }
            .search-box input {
                flex: 1 1 100%;
                text-align: center;
                padding: 0.5rem 0;
            }
            .search-btn {
                flex: 1 1 100%;
                justify-content: center;
                padding: 0.8rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr) !important;
                gap: 0.75rem !important;
            }
            .stat-block {
                padding: 1rem 0.75rem;
            }
        }

        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr !important;
            }
        }