/* roulang page: index */
:root {
            --ink: #18202b;
            --muted: #697382;
            --soft: #f5f6f8;
            --paper: #ffffff;
            --line: #e5e8ed;
            --violet: #7557ef;
            --violet-dark: #4f36bd;
            --coral: #ff765e;
            --mint: #39b9a0;
            --gold: #eab64b;
            --shadow: 0 18px 50px rgba(25, 32, 43, .09);
            --shadow-sm: 0 8px 24px rgba(25, 32, 43, .07);
            --radius-lg: 26px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --container: 1180px;
        }

        * { 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;
            font-size: 15px;
            line-height: 1.75;
            letter-spacing: 0;
        }
        a { color: inherit; text-decoration: none; }
        img { display: block; width: 100%; object-fit: cover; }
        button, input, select { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(117, 87, 239, .35); outline-offset: 3px; }

        .container { width: min(var(--container), calc(100% - 44px)); margin: 0 auto; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--violet-dark);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .08em;
            text-transform: uppercase;
        }
        .eyebrow::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--coral);
            border-radius: 10px;
        }
        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: end;
            gap: 28px;
            margin-bottom: 30px;
        }
        .section-head h2 {
            margin: 7px 0 0;
            font-size: clamp(26px, 4vw, 40px);
            line-height: 1.2;
            letter-spacing: 0;
        }
        .section-head p {
            max-width: 570px;
            margin: 0;
            color: var(--muted);
        }
        .section {
            padding: 92px 0;
            position: relative;
        }
        .section:nth-of-type(even) { background: var(--soft); }
        .section + .section { border-top: 1px solid rgba(229,232,237,.7); }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(255,255,255,.94);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(16px);
        }
        .nav-wrap {
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-width: 250px;
            font-weight: 900;
            font-size: 16px;
            line-height: 1.25;
        }
        .brand-mark {
            width: 39px;
            height: 39px;
            display: grid;
            place-items: center;
            color: #fff;
            background: linear-gradient(135deg, var(--violet), var(--coral));
            border-radius: 12px;
            box-shadow: 0 8px 18px rgba(117,87,239,.28);
            font-size: 19px;
        }
        .nav-links { display: flex; align-items: center; gap: 5px; }
        .nav-links a {
            padding: 9px 13px;
            color: var(--muted);
            border-radius: 9px;
            font-size: 13px;
            font-weight: 700;
            transition: .2s ease;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--violet-dark);
            background: #f0edff;
        }
        .nav-action {
            padding: 11px 17px !important;
            color: #fff !important;
            background: var(--ink) !important;
            border-radius: 10px !important;
        }
        .nav-action:hover { background: var(--violet-dark) !important; }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--line);
            border-radius: 10px;
            color: var(--ink);
            background: #fff;
            font-size: 20px;
        }

        .hero {
            min-height: 660px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background:
                linear-gradient(110deg, rgba(24,32,43,.96) 0%, rgba(37,33,72,.92) 53%, rgba(37,33,72,.4) 100%),
                url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1900&q=88") center/cover;
            color: #fff;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr);
            gap: 70px;
            align-items: center;
        }
        .hero h1 {
            max-width: 720px;
            margin: 18px 0 20px;
            font-size: clamp(36px, 5vw, 68px);
            line-height: 1.12;
            letter-spacing: 0;
        }
        .hero h1 em {
            color: #ffad93;
            font-style: normal;
        }
        .hero-lead {
            max-width: 680px;
            margin: 0 0 26px;
            color: rgba(255,255,255,.78);
            font-size: 16px;
        }
        .hero .eyebrow { color: #c8bfff; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 25px; }
        .button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 11px 19px;
            border: 1px solid transparent;
            border-radius: 11px;
            font-weight: 800;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
        }
        .button:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(0,0,0,.14); }
        .button-primary { color: #fff; background: var(--coral); }
        .button-primary:hover { background: #ff6248; }
        .button-light { color: #fff; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.08); }
        .button-dark { color: #fff; background: var(--ink); }
        .button-outline { color: var(--violet-dark); border-color: #d8d0ff; background: #fff; }
        .hero-note { color: rgba(255,255,255,.6); font-size: 12px; }
        .quiz-panel {
            padding: 27px;
            color: var(--ink);
            background: rgba(255,255,255,.96);
            border: 1px solid rgba(255,255,255,.38);
            border-radius: var(--radius-lg);
            box-shadow: 0 25px 60px rgba(0,0,0,.22);
        }
        .quiz-panel h3 { margin: 0 0 6px; font-size: 21px; }
        .quiz-panel > p { margin: 0 0 22px; color: var(--muted); font-size: 13px; }
        .quiz-question { padding: 17px 0; border-top: 1px solid var(--line); }
        .quiz-question strong { display: block; margin-bottom: 10px; font-size: 14px; }
        .choice-row { display: flex; flex-wrap: wrap; gap: 8px; }
        .choice {
            padding: 7px 11px;
            color: var(--muted);
            background: #f7f7f9;
            border: 1px solid var(--line);
            border-radius: 8px;
            font-size: 12px;
            transition: .2s ease;
        }
        .choice:hover, .choice.selected { color: var(--violet-dark); background: #efecff; border-color: #cfc5ff; }
        .result-box {
            margin-top: 17px;
            padding: 13px;
            color: var(--violet-dark);
            background: #f1efff;
            border-radius: 10px;
            font-size: 12px;
            font-weight: 700;
        }

        .directory { background: #fff; }
        .filter-bar {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-bottom: 26px;
            padding: 9px;
            background: var(--soft);
            border: 1px solid var(--line);
            border-radius: 13px;
        }
        .filter-bar input, .filter-bar select {
            min-height: 40px;
            padding: 8px 12px;
            color: var(--ink);
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 8px;
        }
        .filter-bar input { flex: 1; min-width: 120px; }
        .filter-bar button { border: 0; }
        .poster-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
        .poster-card {
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform .22s ease, box-shadow .22s ease;
        }
        .poster-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
        .poster-image { position: relative; aspect-ratio: 1.32 / 1; overflow: hidden; background: #ddd; }
        .poster-image img { height: 100%; transition: transform .4s ease; }
        .poster-card:hover .poster-image img { transform: scale(1.05); }
        .poster-image::after {
            content: "";
            position: absolute;
            inset: 40% 0 0;
            background: linear-gradient(transparent, rgba(0,0,0,.52));
        }
        .badge {
            position: absolute;
            z-index: 1;
            top: 11px;
            left: 11px;
            padding: 4px 8px;
            color: #fff;
            background: var(--violet);
            border-radius: 6px;
            font-size: 10px;
            font-weight: 900;
        }
        .badge.coral { background: var(--coral); }
        .badge.mint { background: var(--mint); }
        .poster-body { padding: 15px; }
        .poster-body h3 { overflow: hidden; margin: 0 0 7px; font-size: 15px; white-space: nowrap; text-overflow: ellipsis; }
        .poster-meta { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 11px; }
        .score { color: #d08b15; font-weight: 900; }

        .value-section { background: #f8f7ff; }
        .value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
        .value-card { padding: 28px; background: #fff; border: 1px solid #e6e2ff; border-radius: var(--radius-lg); }
        .value-icon {
            width: 43px; height: 43px; display: grid; place-items: center;
            margin-bottom: 20px; color: var(--violet-dark); background: #eeeaff; border-radius: 12px; font-size: 20px;
        }
        .value-card h3 { margin: 0 0 9px; font-size: 19px; }
        .value-card p { margin: 0; color: var(--muted); font-size: 13px; }

        .chart-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 44px; align-items: center; }
        .metric-list { display: grid; gap: 16px; }
        .metric-row { display: grid; grid-template-columns: 105px 1fr 45px; gap: 12px; align-items: center; color: var(--muted); font-size: 12px; }
        .metric-track { height: 9px; overflow: hidden; background: #eceef2; border-radius: 10px; }
        .metric-track span { display: block; height: 100%; background: linear-gradient(90deg, var(--violet), var(--coral)); border-radius: inherit; }
        .metric-row strong { color: var(--ink); text-align: right; }
        .data-board { padding: 28px; background: var(--ink); border-radius: var(--radius-lg); color: #fff; }
        .data-board h3 { margin: 0 0 22px; font-size: 21px; }
        .data-numbers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
        .data-number { padding: 17px 13px; background: rgba(255,255,255,.08); border-radius: 12px; }
        .data-number strong { display: block; font-size: 27px; color: #ffad93; line-height: 1.2; }
        .data-number span { color: rgba(255,255,255,.65); font-size: 11px; }

        .topics { background: var(--soft); }
        .topic-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 13px; }
        .topic {
            min-height: 170px;
            display: flex;
            flex-direction: column;
            justify-content: end;
            padding: 19px;
            color: #fff;
            background-position: center;
            background-size: cover;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
        }
        .topic::before { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 20%, rgba(16,18,25,.87)); }
        .topic > * { position: relative; }
        .topic h3 { margin: 0 0 5px; font-size: 16px; }
        .topic p { margin: 0; color: rgba(255,255,255,.75); font-size: 11px; line-height: 1.55; }

        .ranking-layout { display: grid; grid-template-columns: 1fr .85fr; gap: 25px; }
        .ranking-list { padding: 10px 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); }
        .rank-item { display: grid; grid-template-columns: 35px 1fr auto auto; gap: 15px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); }
        .rank-item:last-child { border-bottom: 0; }
        .rank-num { color: var(--coral); font-size: 18px; font-weight: 900; }
        .rank-item strong { font-size: 14px; }
        .rank-item small { display: block; color: var(--muted); font-size: 11px; }
        .hotness { color: var(--violet-dark); font-size: 12px; font-weight: 800; }
        .mini-score { color: #c48715; font-size: 12px; font-weight: 900; }

        .resources { background: #fff; }
        .resource-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
        .resource-box { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-lg); }
        .resource-box h3 { margin: 0 0 10px; font-size: 21px; }
        .resource-box p { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
        .resource-list { display: grid; gap: 10px; }
        .resource-list a { display: flex; justify-content: space-between; gap: 15px; padding: 12px 0; border-bottom: 1px solid var(--line); font-weight: 700; font-size: 13px; }
        .resource-list a span { color: var(--violet); }

        .popular { background: var(--soft); }
        .popular-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 20px; }
        .feature-card { min-height: 370px; display: flex; align-items: end; padding: 28px; color: #fff; background: linear-gradient(0deg, rgba(12,17,27,.9), transparent 70%), url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1200&q=85") center/cover; border-radius: var(--radius-lg); }
        .feature-card h3 { margin: 9px 0; font-size: 27px; }
        .feature-card p { max-width: 530px; margin: 0; color: rgba(255,255,255,.74); font-size: 13px; }
        .side-picks { display: grid; gap: 12px; }
        .pick { display: grid; grid-template-columns: 91px 1fr; gap: 13px; padding: 12px; background: #fff; border-radius: 13px; }
        .pick img { height: 84px; border-radius: 9px; }
        .pick h4 { margin: 4px 0; font-size: 14px; }
        .pick p { margin: 0; color: var(--muted); font-size: 11px; }

        .news { background: #fff; }
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .news-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; transition: .2s ease; }
        .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
        .news-card img { aspect-ratio: 1.8 / 1; }
        .news-content { padding: 17px; }
        .news-content time { color: var(--violet); font-size: 11px; font-weight: 800; }
        .news-content h3 { margin: 7px 0 0; font-size: 15px; line-height: 1.45; }
        .news-content p { margin: 7px 0 0; color: var(--muted); font-size: 12px; }

        .assurance { background: #f8f7ff; }
        .assurance-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
        .assurance-item { padding: 22px 18px; background: #fff; border: 1px solid #e7e2ff; border-radius: 14px; }
        .assurance-item strong { display: block; margin-bottom: 7px; font-size: 15px; }
        .assurance-item span { color: var(--muted); font-size: 12px; }

        .faq { background: #fff; }
        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 22px; }
        details { padding: 17px 20px; border: 1px solid var(--line); border-radius: 12px; }
        summary { cursor: pointer; font-weight: 800; }
        details p { margin: 12px 0 0; color: var(--muted); font-size: 13px; }

        .lead-section { background: var(--ink); color: #fff; }
        .lead-wrap { display: grid; grid-template-columns: 1fr .85fr; gap: 55px; align-items: center; }
        .lead-wrap h2 { margin: 10px 0 14px; font-size: clamp(28px, 4vw, 43px); line-height: 1.2; }
        .lead-wrap p { max-width: 560px; margin: 0; color: rgba(255,255,255,.68); }
        .lead-form { padding: 25px; background: #fff; border-radius: var(--radius-lg); color: var(--ink); }
        .lead-form h3 { margin: 0 0 16px; }
        .form-grid { display: grid; gap: 10px; }
        .form-grid input, .form-grid select { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px; }
        .form-grid button { border: 0; }

        footer { padding: 55px 0 25px; color: rgba(255,255,255,.65); background: #111722; }
        .footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 35px; padding-bottom: 40px; }
        footer .brand { color: #fff; }
        footer .brand-mark { box-shadow: none; }
        .footer-intro { max-width: 310px; margin: 18px 0 0; font-size: 12px; }
        footer h3 { margin: 0 0 13px; color: #fff; font-size: 14px; }
        footer ul { list-style: none; padding: 0; margin: 0; }
        footer li { margin: 7px 0; font-size: 12px; }
        footer a:hover { color: #fff; }
        .copyright { padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: 11px; }

        @media (max-width: 1024px) {
            .hero-grid { gap: 35px; }
            .poster-grid { grid-template-columns: repeat(3, 1fr); }
            .topic-grid { grid-template-columns: repeat(3, 1fr); }
            .assurance-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .container { width: min(var(--container), calc(100% - 32px)); }
            .nav-wrap { height: 68px; }
            .brand { min-width: 0; font-size: 14px; }
            .brand-mark { width: 35px; height: 35px; }
            .menu-toggle { display: block; }
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 16px;
                right: 16px;
                flex-direction: column;
                align-items: stretch;
                padding: 10px;
                background: #fff;
                border: 1px solid var(--line);
                border-radius: 13px;
                box-shadow: var(--shadow);
            }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 12px 14px; }
            .hero { min-height: auto; padding: 82px 0 70px; }
            .hero-grid, .chart-layout, .ranking-layout, .resource-layout, .lead-wrap { grid-template-columns: 1fr; }
            .hero h1 { font-size: 39px; }
            .quiz-panel { max-width: 600px; }
            .section { padding: 65px 0; }
            .section-head { display: block; }
            .section-head p { margin-top: 13px; }
            .poster-grid { grid-template-columns: repeat(2, 1fr); }
            .value-grid, .news-grid { grid-template-columns: 1fr 1fr; }
            .topic-grid { grid-template-columns: repeat(2, 1fr); }
            .popular-grid { grid-template-columns: 1fr; }
            .feature-card { min-height: 310px; }
            .faq-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 32px; }
            .hero-actions .button { width: 100%; }
            .filter-bar { flex-wrap: wrap; }
            .filter-bar input { flex-basis: 100%; }
            .poster-grid, .value-grid, .news-grid, .assurance-grid { grid-template-columns: 1fr; }
            .topic-grid { grid-template-columns: 1fr 1fr; }
            .topic { min-height: 145px; padding: 14px; }
            .data-numbers { grid-template-columns: 1fr; }
            .metric-row { grid-template-columns: 82px 1fr 35px; gap: 8px; }
            .rank-item { grid-template-columns: 27px 1fr auto; gap: 9px; }
            .rank-item .mini-score { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 26px 18px; }
            .footer-grid > :first-child { grid-column: 1 / -1; }
        }