/* roulang page: index */
:root {
            --bg: #080b18;
            --bg-soft: #0e1326;
            --panel: #121932;
            --panel-light: #172141;
            --primary: #5b67f1;
            --primary-2: #7b61ff;
            --cyan: #49c7f5;
            --text: #f6f7ff;
            --muted: #9da7c5;
            --muted-2: #7782a4;
            --line: rgba(152, 167, 217, .16);
            --radius-xl: 28px;
            --radius-lg: 20px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .32);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text);
            background:
                radial-gradient(circle at 80% 0%, rgba(85, 97, 239, .18), transparent 28rem),
                radial-gradient(circle at 0% 45%, rgba(42, 126, 221, .10), transparent 25rem),
                var(--bg);
            line-height: 1.75;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; }
        button, input, select { font: inherit; }
        button { border: 0; cursor: pointer; }
        img { display: block; max-width: 100%; }
        .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
        .site-header {
            position: sticky; top: 0; z-index: 50;
            background: rgba(8, 11, 24, .78);
            border-bottom: 1px solid rgba(255,255,255,.07);
            backdrop-filter: blur(18px);
        }
        .nav-wrap { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.03em; white-space: nowrap; }
        .brand-mark {
            width: 34px; height: 34px; display: grid; place-items: center; border-radius: 11px;
            color: #fff; background: linear-gradient(145deg, var(--primary), var(--cyan));
            box-shadow: 0 8px 22px rgba(91, 103, 241, .3);
        }
        .nav-links { display: flex; align-items: center; gap: 5px; }
        .nav-links a {
            padding: 8px 13px; color: var(--muted); font-size: 14px; border-radius: 10px; transition: .25s ease;
        }
        .nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(255,255,255,.07); }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .nav-download, .btn-primary {
            display: inline-flex; align-items: center; justify-content: center; gap: 9px;
            color: #fff; background: linear-gradient(135deg, var(--primary), var(--primary-2));
            box-shadow: 0 12px 28px rgba(91, 103, 241, .25);
            transition: transform .25s ease, box-shadow .25s ease, filter .25s ease;
        }
        .nav-download { padding: 10px 16px; border-radius: 11px; font-size: 14px; }
        .btn-primary { padding: 14px 22px; border-radius: 14px; font-weight: 700; }
        .nav-download:hover, .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(91,103,241,.38); filter: brightness(1.08); }
        .btn-secondary {
            display: inline-flex; align-items: center; justify-content: center; gap: 9px;
            padding: 13px 21px; border: 1px solid var(--line); color: #dfe5ff; border-radius: 14px;
            background: rgba(255,255,255,.045); transition: .25s ease;
        }
        .btn-secondary:hover { background: rgba(255,255,255,.1); border-color: rgba(131,145,255,.42); transform: translateY(-2px); }
        .menu-button { display: none; color: #fff; background: transparent; font-size: 22px; }
        .hero { padding: 82px 0 74px; position: relative; }
        .hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 62px; align-items: center; }
        .eyebrow, .section-kicker {
            display: inline-flex; align-items: center; gap: 8px; color: #aeb8ff; font-size: 13px; font-weight: 700; letter-spacing: .08em;
        }
        .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--cyan); }
        h1 { max-width: 700px; margin: 19px 0 20px; font-size: clamp(42px, 5.2vw, 72px); line-height: 1.12; letter-spacing: -.065em; }
        .hero-copy { max-width: 620px; color: var(--muted); font-size: 17px; line-height: 1.9; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
        .hero-points { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: #b8c1de; font-size: 13px; }
        .hero-points span { display: inline-flex; align-items: center; gap: 7px; }
        .hero-points i { color: var(--cyan); }
        .test-panel {
            padding: 18px; border: 1px solid var(--line); border-radius: 30px; background: rgba(17,25,50,.78);
            box-shadow: var(--shadow); transform: rotate(1deg);
        }
        .test-top { display: flex; justify-content: space-between; align-items: center; padding: 5px 5px 17px; color: #cad2ef; font-size: 13px; }
        .test-light { display: inline-flex; align-items: center; gap: 7px; }
        .test-light::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #48ddaa; box-shadow: 0 0 13px #48ddaa; }
        .test-body { padding: 25px; border-radius: 23px; background: linear-gradient(150deg, #1d2850, #111936); }
        .test-body h3 { font-size: 24px; line-height: 1.35; margin-bottom: 9px; }
        .test-body p { color: var(--muted); font-size: 14px; }
        .choice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 22px; }
        .choice { padding: 15px; border-radius: 14px; border: 1px solid var(--line); color: #d7def8; background: rgba(255,255,255,.045); transition: .25s ease; }
        .choice:hover, .choice.selected { border-color: #7180ff; background: rgba(91,103,241,.17); }
        .choice i { display: block; margin-bottom: 8px; color: var(--cyan); font-size: 18px; }
        .test-result { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 18px; padding: 14px 16px; border-radius: 15px; background: rgba(6,10,26,.55); }
        .result-label { color: var(--muted-2); font-size: 12px; }
        .result-value { color: #fff; font-size: 17px; font-weight: 700; }
        .signal-bars { display: flex; align-items: end; gap: 3px; height: 24px; }
        .signal-bars span { width: 5px; border-radius: 3px; background: var(--cyan); }
        .signal-bars span:nth-child(1){height:8px}.signal-bars span:nth-child(2){height:13px}.signal-bars span:nth-child(3){height:18px}.signal-bars span:nth-child(4){height:24px}
        .glow-line { height: 1px; margin: 0 auto; background: linear-gradient(90deg, transparent, #5966eb, #4fc4ed, transparent); opacity: .72; }
        section { padding: 92px 0; position: relative; }
        .section-head { max-width: 720px; margin-bottom: 38px; }
        .section-title { margin-top: 11px; font-size: clamp(30px, 4vw, 46px); line-height: 1.2; letter-spacing: -.05em; }
        .section-desc { margin-top: 15px; color: var(--muted); font-size: 16px; line-height: 1.85; }
        .dark-section { background: rgba(14,19,38,.66); border-top: 1px solid rgba(255,255,255,.04); border-bottom: 1px solid rgba(255,255,255,.04); }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .feature-card, .scene-card, .team-card, .review-card, .news-card {
            border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(18,25,50,.72);
            transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
        }
        .feature-card { padding: 27px; min-height: 230px; }
        .feature-card:hover, .scene-card:hover, .team-card:hover, .review-card:hover, .news-card:hover { transform: translateY(-5px); border-color: rgba(113,128,255,.5); box-shadow: 0 18px 35px rgba(0,0,0,.2); }
        .icon-box { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; color: #bdeeff; background: linear-gradient(145deg, rgba(91,103,241,.35), rgba(73,199,245,.14)); font-size: 20px; }
        .feature-card h3, .scene-card h3, .team-card h3, .review-card h3 { margin-top: 21px; font-size: 19px; }
        .feature-card p, .scene-card p, .team-card p, .review-card p { margin-top: 9px; color: var(--muted); font-size: 14px; line-height: 1.8; }
        .scene-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 24px; align-items: stretch; }
        .scene-card { padding: 24px; min-height: 190px; }
        .scene-card small { color: var(--cyan); font-weight: 700; }
        .scene-card.wide { display: flex; flex-direction: column; justify-content: space-between; background: linear-gradient(145deg, rgba(30,42,84,.9), rgba(18,25,50,.76)); }
        .scene-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
        .demo-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: 35px; align-items: center; }
        .demo-image { position: relative; overflow: hidden; border-radius: 25px; border: 1px solid var(--line); box-shadow: var(--shadow); }
        .demo-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(6,9,24,.75)); pointer-events: none; }
        .demo-caption { position: absolute; z-index: 1; left: 23px; right: 23px; bottom: 18px; display: flex; justify-content: space-between; align-items: end; }
        .demo-caption strong { font-size: 20px; }
        .demo-caption span { color: #9feaff; font-size: 13px; }
        .steps { display: grid; gap: 16px; }
        .step { display: flex; gap: 16px; padding: 17px; border-bottom: 1px solid var(--line); }
        .step-number { flex: 0 0 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--primary); font-weight: 800; }
        .step h3 { font-size: 17px; }
        .step p { margin-top: 4px; color: var(--muted); font-size: 14px; }
        .team-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
        .team-card { padding: 23px; }
        .team-head { display: flex; gap: 13px; align-items: center; }
        .avatar { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; color: #fff; background: linear-gradient(145deg, #5362eb, #27aaca); font-weight: 800; }
        .team-card h3 { margin: 0; }
        .team-card .role { color: var(--cyan); font-size: 12px; }
        .trust-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 25px; align-items: stretch; }
        .trust-box { padding: 31px; border-radius: var(--radius-xl); background: linear-gradient(145deg, rgba(25,35,73,.92), rgba(13,18,37,.9)); border: 1px solid var(--line); }
        .trust-box h3 { font-size: 25px; line-height: 1.35; }
        .trust-box p { margin-top: 13px; color: var(--muted); }
        .trust-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; margin-top: 23px; }
        .trust-item { padding: 14px; border: 1px solid var(--line); border-radius: 14px; color: #d7dff9; font-size: 13px; }
        .trust-item i { margin-right: 7px; color: #6fe0b1; }
        .metric-panel { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
        .metric { display: flex; flex-direction: column; justify-content: center; min-height: 130px; padding: 22px; border-radius: 19px; background: rgba(255,255,255,.045); border: 1px solid var(--line); }
        .metric strong { font-size: 30px; letter-spacing: -.04em; }
        .metric span { margin-top: 4px; color: var(--muted); font-size: 13px; }
        .time-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 15px; }
        .time-card { padding: 22px; border: 1px solid var(--line); border-radius: 19px; background: rgba(18,25,50,.72); }
        .time-card strong { display: block; font-size: 25px; }
        .time-card span { color: var(--muted); font-size: 13px; }
        .time-card p { margin-top: 15px; color: #c8d0eb; font-size: 13px; line-height: 1.7; }
        .time-card.highlight { border-color: rgba(108,124,255,.7); background: linear-gradient(145deg, rgba(62,72,164,.55), rgba(18,25,50,.8)); }
        .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .case-card { padding: 24px; border-radius: 20px; background: #10172e; border: 1px solid var(--line); }
        .case-top { display: flex; justify-content: space-between; color: #b9c5f0; font-size: 13px; }
        .case-card h3 { margin-top: 25px; font-size: 20px; }
        .case-card p { margin-top: 10px; color: var(--muted); font-size: 14px; }
        .bar { height: 7px; margin-top: 22px; overflow: hidden; border-radius: 8px; background: rgba(255,255,255,.08); }
        .bar span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--primary), var(--cyan)); }
        .pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; align-items: stretch; }
        .price-card { display: flex; flex-direction: column; padding: 25px; border-radius: 21px; background: rgba(18,25,50,.8); border: 1px solid var(--line); }
        .price-card.recommend { border-color: rgba(112,126,255,.85); background: linear-gradient(160deg, rgba(53,64,148,.62), rgba(18,25,50,.9)); }
        .price-tag { display: inline-flex; width: max-content; padding: 4px 9px; border-radius: 7px; color: #c5f3ff; background: rgba(73,199,245,.13); font-size: 12px; }
        .price-card h3 { margin-top: 17px; font-size: 20px; }
        .price { margin-top: 9px; font-size: 34px; font-weight: 800; letter-spacing: -.05em; }
        .price small { color: var(--muted); font-size: 12px; font-weight: 400; }
        .price-card ul { display: grid; gap: 10px; margin: 19px 0 24px; color: #c3cbe5; font-size: 13px; }
        .price-card li { display: flex; gap: 8px; }
        .price-card li i { color: var(--cyan); margin-top: 5px; }
        .price-card .btn-secondary, .price-card .btn-primary { margin-top: auto; width: 100%; }
        .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 17px; }
        .review-card { padding: 24px; }
        .stars { color: #ffc857; letter-spacing: 2px; font-size: 13px; }
        .review-card p { color: #c5cce4; margin: 17px 0 22px; }
        .review-user { display: flex; align-items: center; gap: 10px; color: #aeb7d4; font-size: 13px; }
        .review-avatar { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: #2b3b76; font-size: 12px; }
        .invite { padding: 32px; border-radius: 25px; background: linear-gradient(100deg, #222d6b, #17264d 55%, #123c59); border: 1px solid rgba(118,144,255,.35); display: flex; justify-content: space-between; align-items: center; gap: 25px; }
        .invite h2 { font-size: 29px; line-height: 1.35; }
        .invite p { margin-top: 8px; color: #c8d6f2; font-size: 14px; }
        .progress-wrap { min-width: 260px; }
        .progress-label { display: flex; justify-content: space-between; color: #d5def8; font-size: 12px; margin-bottom: 8px; }
        .progress { height: 8px; border-radius: 9px; background: rgba(255,255,255,.13); overflow: hidden; }
        .progress span { display: block; height: 100%; width: 68%; background: linear-gradient(90deg, #54d4f5, #8490ff); border-radius: inherit; }
        .news-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 17px; }
        .news-card { padding: 23px; min-height: 190px; }
        .news-card.featured { background: linear-gradient(145deg, rgba(35,49,106,.88), rgba(18,25,50,.8)); }
        .news-label { color: var(--cyan); font-size: 12px; font-weight: 700; }
        .news-card h3 { margin-top: 17px; font-size: 20px; line-height: 1.45; }
        .news-card p { margin-top: 10px; color: var(--muted); font-size: 13px; }
        .booking { display: grid; grid-template-columns: .9fr 1.1fr; gap: 32px; align-items: start; }
        .booking-copy h2 { margin-top: 12px; font-size: 39px; line-height: 1.25; letter-spacing: -.05em; }
        .booking-copy p { margin-top: 15px; color: var(--muted); }
        .booking-points { display: grid; gap: 11px; margin-top: 24px; color: #cbd3ec; font-size: 14px; }
        .booking-points i { width: 22px; color: var(--cyan); }
        .form-card { padding: 27px; border: 1px solid var(--line); border-radius: 24px; background: rgba(18,25,50,.82); box-shadow: var(--shadow); }
        .form-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
        .field { display: grid; gap: 7px; }
        .field.full { grid-column: 1 / -1; }
        .field label { color: #cbd3ee; font-size: 13px; }
        .field input, .field select { width: 100%; padding: 12px 13px; color: #fff; border: 1px solid var(--line); border-radius: 11px; outline: none; background: rgba(255,255,255,.05); transition: .2s ease; }
        .field input:focus, .field select:focus { border-color: #7785ff; box-shadow: 0 0 0 3px rgba(91,103,241,.17); }
        .field select option { color: #111; }
        .form-card .btn-primary { width: 100%; margin-top: 18px; }
        footer { padding: 42px 0 25px; border-top: 1px solid var(--line); background: #070a16; }
        .footer-top { display: flex; justify-content: space-between; gap: 30px; padding-bottom: 35px; }
        .footer-brand { max-width: 315px; }
        .footer-brand p { margin-top: 13px; color: var(--muted); font-size: 13px; }
        .footer-links { display: flex; gap: 70px; }
        .footer-links h4 { margin-bottom: 13px; font-size: 14px; }
        .footer-links a { display: block; margin: 8px 0; color: var(--muted); font-size: 13px; transition: .2s ease; }
        .footer-links a:hover { color: #fff; }
        .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted-2); font-size: 12px; }
        :focus-visible { outline: 3px solid rgba(73,199,245,.7); outline-offset: 3px; }
        @media (max-width: 1024px) {
            .nav-links a { padding: 8px 8px; font-size: 13px; }
            .hero-grid, .demo-layout, .booking, .trust-layout { gap: 28px; }
            .pricing-grid { grid-template-columns: repeat(2,1fr); }
            .time-grid { grid-template-columns: repeat(2,1fr); }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 30px, 620px); }
            .nav-wrap { height: 68px; }
            .menu-button { display: block; }
            .nav-links { display: none; position: absolute; top: 68px; left: 15px; right: 15px; padding: 12px; flex-direction: column; align-items: stretch; border: 1px solid var(--line); border-radius: 16px; background: rgba(12,17,35,.97); box-shadow: var(--shadow); }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 12px; }
            .nav-actions .nav-download { display: none; }
            .hero { padding: 58px 0 52px; }
            .hero-grid, .demo-layout, .booking, .trust-layout { grid-template-columns: 1fr; }
            .hero-grid { gap: 42px; }
            .test-panel { transform: none; }
            section { padding: 68px 0; }
            .feature-grid, .team-grid, .case-grid, .review-grid { grid-template-columns: 1fr; }
            .scene-layout { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .invite { align-items: flex-start; flex-direction: column; }
            .progress-wrap { width: 100%; }
            .footer-top { flex-direction: column; }
            .footer-links { gap: 45px; }
        }
        @media (max-width: 520px) {
            h1 { font-size: 42px; }
            .hero-copy { font-size: 15px; }
            .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; }
            .choice-grid, .trust-list, .metric-panel, .form-grid { grid-template-columns: 1fr; }
            .field.full { grid-column: auto; }
            .pricing-grid, .time-grid { grid-template-columns: 1fr; }
            .footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-bottom { flex-direction: column; }
        }