/* roulang page: index */
:root {
            --ink: #18212b;
            --muted: #71808d;
            --paper: #f7f8f6;
            --surface: #ffffff;
            --line: #e5e9e7;
            --teal: #0d766d;
            --teal-dark: #07554f;
            --coral: #e26d52;
            --gold: #c7963d;
            --radius: 16px;
            --shadow: 0 16px 45px rgba(24, 33, 43, .08);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            letter-spacing: 0;
        }
        a { color: inherit; text-decoration: none; transition: .25s ease; }
        img { display: block; width: 100%; object-fit: cover; }
        button, input { font: inherit; }
        .container { max-width: 1180px; }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(247,248,246,.94);
            border-bottom: 1px solid rgba(229,233,231,.9);
            backdrop-filter: blur(16px);
        }
        .navbar { min-height: 78px; }
        .brand-mark {
            width: 38px; height: 38px; border-radius: 11px;
            display: inline-grid; place-items: center;
            color: #fff; background: var(--teal);
            box-shadow: 0 7px 16px rgba(13,118,109,.24);
        }
        .brand-name { font-weight: 800; letter-spacing: -.5px; }
        .nav-link {
            color: var(--muted) !important;
            font-size: 14px;
            padding: 10px 13px !important;
            border-radius: 9px;
        }
        .nav-link:hover, .nav-link.active { color: var(--teal) !important; background: #e9f2ef; }
        .nav-action {
            color: #fff !important;
            background: var(--coral);
            border-radius: 9px;
            padding: 10px 17px !important;
            box-shadow: 0 8px 18px rgba(226,109,82,.2);
        }
        .nav-action:hover { background: #c95840; transform: translateY(-1px); }
        .hero {
            color: #fff;
            min-height: 620px;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(90deg, rgba(7,34,39,.94) 0%, rgba(7,34,39,.78) 48%, rgba(7,34,39,.32) 100%),
                url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1800&q=85") center/cover;
        }
        .hero::after {
            content: "";
            position: absolute; inset: auto 0 0;
            height: 100px;
            background: linear-gradient(transparent, var(--paper));
        }
        .hero-content { position: relative; z-index: 1; padding: 100px 0 135px; }
        .eyebrow {
            display: inline-flex; gap: 8px; align-items: center;
            color: #b9e2db; font-size: 13px; font-weight: 700;
            letter-spacing: 1.5px;
        }
        .hero h1 {
            max-width: 720px; margin: 18px 0 18px;
            font-size: clamp(2.5rem, 5vw, 4.7rem);
            line-height: 1.16; letter-spacing: -2px;
            font-weight: 900;
        }
        .hero h1 span { color: #f2b36c; }
        .hero-copy { max-width: 690px; color: #d9e6e2; font-size: 17px; }
        .hero-actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
        .btn-brand, .btn-outline-light-custom {
            border-radius: 10px; padding: 12px 20px; font-weight: 700;
            transition: .25s ease;
        }
        .btn-brand { color: #fff; background: var(--coral); border: 1px solid var(--coral); }
        .btn-brand:hover { color: #fff; background: #c95840; transform: translateY(-2px); }
        .btn-outline-light-custom { color: #fff; border: 1px solid rgba(255,255,255,.5); }
        .btn-outline-light-custom:hover { color: var(--ink); background: #fff; }
        .metric-strip {
            position: relative; z-index: 2; margin-top: -64px;
            background: var(--surface); border: 1px solid var(--line);
            box-shadow: var(--shadow); border-radius: var(--radius);
            padding: 24px 28px;
        }
        .metric { border-right: 1px solid var(--line); }
        .metric:last-child { border-right: 0; }
        .metric strong { display:block; color: var(--teal); font-size: 26px; line-height: 1.2; }
        .metric small { color: var(--muted); }
        section { padding: 86px 0; }
        .section-soft { background: #eef3f1; }
        .section-head { max-width: 700px; margin-bottom: 32px; }
        .section-kicker { color: var(--coral); font-size: 12px; font-weight: 800; letter-spacing: 1.6px; text-transform: uppercase; }
        .section-title { margin: 8px 0 12px; font-size: clamp(1.8rem, 3vw, 2.65rem); line-height: 1.28; font-weight: 850; }
        .section-desc { color: var(--muted); margin: 0; }
        .feature-band { background: var(--teal-dark); color: #fff; }
        .feature-band .section-desc { color: #bdd6d1; }
        .feature-item { height: 100%; padding: 24px; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); background: rgba(255,255,255,.06); }
        .feature-icon { color: #f2b36c; font-size: 24px; margin-bottom: 14px; }
        .feature-item h3 { font-size: 18px; margin-bottom: 8px; }
        .feature-item p { color: #c8dad5; font-size: 14px; margin: 0; }
        .poster-card {
            overflow: hidden; height: 100%; background: var(--surface);
            border: 1px solid var(--line); border-radius: var(--radius);
            box-shadow: 0 7px 22px rgba(24,33,43,.04);
            transition: .28s ease;
        }
        .poster-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
        .poster-img { height: 250px; position: relative; overflow: hidden; }
        .poster-img img { height: 100%; transition: .4s ease; }
        .poster-card:hover .poster-img img { transform: scale(1.05); }
        .poster-overlay { position: absolute; inset: 0; background: linear-gradient(transparent 45%, rgba(0,0,0,.7)); }
        .badge-custom {
            position: absolute; top: 13px; left: 13px;
            color: #fff; background: var(--coral);
            border-radius: 6px; padding: 3px 8px; font-size: 11px; font-weight: 800;
        }
        .poster-info { padding: 16px; }
        .poster-info h3 { font-size: 16px; margin: 0 0 7px; font-weight: 800; }
        .poster-meta { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 12px; }
        .score { color: var(--gold); font-weight: 800; }
        .category-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
        .category-box { padding: 20px 16px; min-height: 150px; border: 1px solid var(--line); background: #fff; border-radius: 12px; transition: .25s; }
        .category-box:hover { border-color: var(--teal); transform: translateY(-3px); }
        .category-box i { color: var(--teal); font-size: 20px; margin-bottom: 14px; }
        .category-box h3 { font-size: 16px; margin-bottom: 7px; }
        .category-box p { color: var(--muted); font-size: 12px; line-height: 1.65; margin: 0; }
        .rank-list { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
        .rank-item { display: grid; grid-template-columns: 46px 1fr 100px 60px 84px; align-items: center; gap: 12px; padding: 15px 20px; border-bottom: 1px solid var(--line); }
        .rank-item:last-child { border-bottom: 0; }
        .rank-number { color: var(--coral); font-size: 20px; font-weight: 900; }
        .rank-name { font-weight: 700; }
        .rank-type { color: var(--muted); font-size: 12px; }
        .hot { color: var(--coral); font-size: 13px; }
        .tag { color: var(--teal); background: #e7f1ee; border-radius: 6px; padding: 3px 7px; font-size: 11px; text-align: center; }
        .news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .news-card { display: flex; gap: 15px; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
        .news-card img { width: 105px; height: 80px; border-radius: 8px; flex: 0 0 auto; }
        .news-card h3 { font-size: 15px; line-height: 1.45; margin: 4px 0; }
        .news-card time { color: var(--muted); font-size: 11px; }
        .compare { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
        .compare-row { display:grid; grid-template-columns: 1.2fr 1fr 1fr; border-bottom: 1px solid var(--line); }
        .compare-row:last-child { border-bottom: 0; }
        .compare-row > div { padding: 16px 20px; border-right: 1px solid var(--line); }
        .compare-row > div:last-child { border-right: 0; }
        .compare-head { font-weight: 800; background: #eaf3f0; }
        .check { color: var(--teal); }
        .faq-wrap { max-width: 850px; margin: auto; }
        .accordion-item { border: 1px solid var(--line) !important; margin-bottom: 10px; border-radius: 10px !important; overflow: hidden; }
        .accordion-button { font-weight: 750; color: var(--ink); background: #fff; box-shadow: none !important; }
        .accordion-button:not(.collapsed) { color: var(--teal-dark); background: #eef5f2; }
        .accordion-body { color: var(--muted); font-size: 14px; }
        .closing { background: #f2e9df; }
        .closing-box { display:flex; align-items:center; justify-content:space-between; gap:25px; padding: 34px 40px; border-radius: var(--radius); background: var(--coral); color:#fff; }
        .closing-box h2 { font-size: 25px; margin:0 0 6px; }
        .closing-box p { margin:0; color:#ffe8df; }
        .site-footer { color: #b9c8c4; background: #102b2f; padding: 62px 0 24px; }
        .site-footer .brand-name { color: #fff; }
        .footer-title { color:#fff; font-size:14px; font-weight:800; margin-bottom:15px; }
        .footer-link { display:block; color:#b9c8c4; font-size:13px; margin-bottom:8px; }
        .footer-link:hover { color:#f2b36c; }
        .footer-bottom { border-top:1px solid rgba(255,255,255,.14); margin-top:35px; padding-top:18px; font-size:12px; }
        :focus-visible { outline: 3px solid rgba(226,109,82,.45); outline-offset: 3px; }
        @media (max-width: 991px) {
            .navbar-collapse { padding: 14px 0; }
            .category-grid { grid-template-columns: repeat(3, 1fr); }
            .news-list { grid-template-columns: repeat(2, 1fr); }
            .hero { min-height: 580px; }
        }
        @media (max-width: 767px) {
            section { padding: 62px 0; }
            .hero-content { padding: 78px 0 120px; }
            .hero h1 { letter-spacing: -1px; }
            .metric { border-right: 0; border-bottom: 1px solid var(--line); padding: 10px 0; }
            .metric:last-child { border-bottom: 0; }
            .category-grid, .news-list { grid-template-columns: 1fr 1fr; }
            .rank-item { grid-template-columns: 32px 1fr 55px; padding: 13px 14px; }
            .rank-item .rank-type, .rank-item .tag { display:none; }
            .closing-box { display:block; padding: 26px; }
            .closing-box .btn { margin-top:18px; }
        }
        @media (max-width: 520px) {
            .brand-name { font-size: 14px; }
            .hero-copy { font-size: 15px; }
            .category-grid, .news-list { grid-template-columns: 1fr; }
            .poster-img { height: 220px; }
            .compare-row { grid-template-columns: 1fr 1fr; }
            .compare-row > div:first-child { grid-column: 1 / -1; background:#f7faf9; }
            .compare-row > div:nth-child(2), .compare-row > div:nth-child(3) { font-size: 13px; }
        }