/* roulang page: index */
:root {
            --ink: #080d1f;
            --deep: #0d1430;
            --panel: #111936;
            --panel-light: #172249;
            --text: #f5f7ff;
            --muted: #9da8c7;
            --soft: #c6cce0;
            --line: rgba(174, 190, 255, .14);
            --primary: #6d7cff;
            --primary-dark: #5263ed;
            --cyan: #47d7ff;
            --radius-xl: 28px;
            --radius-lg: 20px;
            --shadow: 0 24px 70px rgba(0, 0, 0, .26);
        }

        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--text);
            background:
                radial-gradient(circle at 15% 0%, rgba(89, 104, 255, .18), transparent 30rem),
                radial-gradient(circle at 90% 10%, rgba(39, 205, 255, .1), transparent 26rem),
                var(--ink);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            overflow-x: hidden;
        }

        a { color: inherit; text-decoration: none; }
        img { display: block; max-width: 100%; }
        button, a { -webkit-tap-highlight-color: transparent; }
        :focus-visible { outline: 3px solid rgba(71, 215, 255, .65); outline-offset: 4px; }

        .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
        .section { padding: 104px 0; position: relative; }
        .section.alt { background: rgba(255, 255, 255, .018); border-top: 1px solid rgba(255,255,255,.04); border-bottom: 1px solid rgba(255,255,255,.04); }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 13px;
            border: 1px solid rgba(109, 124, 255, .3);
            border-radius: 999px;
            color: #b7c0ff;
            background: rgba(109, 124, 255, .1);
            font-size: 13px;
            letter-spacing: .08em;
        }
        .eyebrow i { color: var(--cyan); font-size: 10px; }
        .section-heading { max-width: 720px; margin-bottom: 44px; }
        .section-heading h2 {
            margin: 16px 0 14px;
            font-size: clamp(30px, 4vw, 48px);
            line-height: 1.2;
            letter-spacing: -.045em;
        }
        .section-heading p { margin: 0; color: var(--muted); font-size: 16px; }
        .muted { color: var(--muted); }

        header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(8, 13, 31, .78);
            border-bottom: 1px solid rgba(255,255,255,.08);
            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: 12px; font-weight: 800; font-size: 19px; letter-spacing: -.03em; }
        .brand-mark {
            width: 37px; height: 37px; border-radius: 13px;
            display: grid; place-items: center;
            color: white; background: linear-gradient(145deg, var(--primary), var(--cyan));
            box-shadow: 0 8px 25px rgba(71, 215, 255, .2);
        }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-link {
            padding: 10px 15px; color: var(--muted); border-radius: 12px; font-size: 14px;
            transition: .25s ease;
        }
        .nav-link:hover, .nav-link.active { color: #fff; background: rgba(255,255,255,.07); }
        .nav-download, .btn-primary {
            display: inline-flex; align-items: center; justify-content: center; gap: 9px;
            min-height: 46px; padding: 0 20px; border-radius: 13px;
            color: #fff; background: linear-gradient(135deg, var(--primary), #4c61e8);
            border: 1px solid rgba(255,255,255,.16);
            box-shadow: 0 12px 28px rgba(82, 99, 237, .28);
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
            font-weight: 700; font-size: 14px;
        }
        .nav-download:hover, .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(82,99,237,.4); background: linear-gradient(135deg, #7d8aff, #596cf4); }
        .btn-secondary {
            display: inline-flex; align-items: center; justify-content: center; gap: 9px;
            min-height: 46px; padding: 0 20px; border-radius: 13px;
            border: 1px solid var(--line); color: #e1e6ff; background: rgba(255,255,255,.045);
            transition: .25s ease; font-weight: 700; font-size: 14px;
        }
        .btn-secondary:hover { transform: translateY(-2px); border-color: rgba(109,124,255,.55); background: rgba(109,124,255,.12); }

        .hero {
            min-height: 700px;
            padding: 76px 0 88px;
            display: flex; align-items: center;
            background:
                linear-gradient(90deg, rgba(8,13,31,.98) 0%, rgba(8,13,31,.78) 46%, rgba(8,13,31,.2) 100%),
                radial-gradient(circle at 80% 20%, rgba(79, 109, 255, .24), transparent 32rem);
        }
        .hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 70px; align-items: center; }
        .hero h1 { max-width: 690px; margin: 21px 0 20px; font-size: clamp(42px, 6vw, 78px); line-height: 1.08; letter-spacing: -.065em; }
        .hero h1 span { color: #8d9aff; }
        .hero-copy { max-width: 650px; color: var(--soft); font-size: 18px; line-height: 1.9; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 31px; }
        .hero-note { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 27px; color: var(--muted); font-size: 13px; }
        .hero-note i { margin-right: 6px; color: var(--cyan); }
        .hero-art { position: relative; }
        .hero-image {
            width: 100%; border: 1px solid rgba(166, 181, 255, .26); border-radius: 26px;
            box-shadow: var(--shadow), 0 0 80px rgba(83, 105, 255, .18);
            opacity: .86; filter: saturate(1.12);
        }
        .hero-panel {
            position: absolute; left: -28px; bottom: -28px; width: 230px;
            padding: 18px; border: 1px solid var(--line); border-radius: 18px;
            background: rgba(17,25,54,.92); box-shadow: var(--shadow); backdrop-filter: blur(15px);
        }
        .hero-panel strong { display: block; font-size: 26px; margin-top: 5px; }
        .hero-panel small { color: var(--muted); font-size: 12px; }
        .signal { display: flex; gap: 4px; align-items: end; height: 27px; margin-top: 12px; }
        .signal b { width: 7px; border-radius: 4px; background: var(--cyan); }
        .signal b:nth-child(1) { height: 10px; opacity: .45; }
        .signal b:nth-child(2) { height: 17px; opacity: .65; }
        .signal b:nth-child(3) { height: 23px; opacity: .82; }
        .signal b:nth-child(4) { height: 27px; }

        .ticker {
            overflow: hidden; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
            background: rgba(109,124,255,.08); white-space: nowrap;
        }
        .ticker-track { display: flex; gap: 60px; min-width: max-content; padding: 13px 0; color: #cbd2ff; font-size: 13px; animation: marquee 28s linear infinite; }
        .ticker-track span::before { content: "✦"; margin-right: 10px; color: var(--cyan); }
        @keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-35%); } }

        .kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .kpi {
            padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg);
            background: linear-gradient(145deg, rgba(23,34,73,.75), rgba(17,25,54,.5));
        }
        .kpi strong { display: block; font-size: 36px; line-height: 1.2; letter-spacing: -.05em; }
        .kpi strong span { color: var(--cyan); font-size: 20px; }
        .kpi p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }

        .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .service-card, .quote-card, .security-card, .news-card, .faq-item, .price-card {
            border: 1px solid var(--line); background: rgba(17,25,54,.7); border-radius: var(--radius-lg);
            transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
        }
        .service-card { padding: 28px; min-height: 245px; }
        .service-card:hover, .quote-card:hover, .news-card:hover, .price-card:hover { transform: translateY(-6px); border-color: rgba(109,124,255,.54); box-shadow: 0 18px 45px rgba(0,0,0,.2); }
        .icon-box { width: 48px; height: 48px; display: grid; place-items: center; color: #dce1ff; border-radius: 15px; background: linear-gradient(135deg, rgba(109,124,255,.3), rgba(71,215,255,.12)); font-size: 20px; }
        .service-card h3 { margin: 22px 0 8px; font-size: 20px; }
        .service-card p { margin: 0; color: var(--muted); font-size: 14px; }

        .split { display: grid; grid-template-columns: .88fr 1.12fr; gap: 55px; align-items: center; }
        .line-list { display: grid; gap: 14px; }
        .line-item { display: flex; gap: 15px; padding: 18px; border-bottom: 1px solid var(--line); }
        .line-item:last-child { border-bottom: 0; }
        .line-number { color: var(--cyan); font-weight: 800; font-size: 14px; }
        .line-item h3 { margin: 0 0 4px; font-size: 17px; }
        .line-item p { margin: 0; color: var(--muted); font-size: 13px; }
        .compare-box { padding: 30px; border-radius: var(--radius-xl); background: linear-gradient(145deg, #151f48, #0e1530); border: 1px solid var(--line); }
        .compare-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; padding: 17px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
        .compare-row:first-child { color: var(--muted); font-size: 12px; }
        .compare-row:last-child { border-bottom: 0; }
        .compare-row b { color: #e7eaff; }
        .compare-row .good { color: #69e4c7; }

        .timeline { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
        .timeline:before { content: ""; position: absolute; left: 6%; right: 6%; top: 24px; height: 1px; background: linear-gradient(90deg, var(--primary), var(--cyan)); opacity: .5; }
        .milestone { position: relative; padding-top: 58px; }
        .milestone-dot { position: absolute; top: 13px; left: 0; width: 23px; height: 23px; border-radius: 50%; background: var(--deep); border: 6px solid var(--primary); box-shadow: 0 0 0 5px rgba(109,124,255,.12); }
        .milestone h3 { margin: 0 0 8px; font-size: 18px; }
        .milestone p { margin: 0; color: var(--muted); font-size: 13px; }

        .news-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 18px; }
        .news-card { padding: 25px; min-height: 205px; }
        .news-card.featured { background: linear-gradient(145deg, rgba(79,96,220,.36), rgba(17,25,54,.8)); }
        .news-meta { color: var(--cyan); font-size: 12px; }
        .news-card h3 { margin: 17px 0 10px; font-size: 20px; line-height: 1.4; }
        .news-card p { margin: 0; color: var(--muted); font-size: 13px; }

        .security-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .security-card { padding: 24px; }
        .security-card i { color: var(--cyan); font-size: 22px; }
        .security-card h3 { margin: 17px 0 8px; font-size: 17px; }
        .security-card p { margin: 0; color: var(--muted); font-size: 13px; }

        .price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .price-card { padding: 24px; position: relative; }
        .price-card.recommended { border-color: rgba(109,124,255,.75); box-shadow: 0 18px 45px rgba(63,81,218,.18); }
        .recommend { position: absolute; top: 17px; right: 17px; padding: 4px 8px; border-radius: 999px; color: #dbe0ff; background: rgba(109,124,255,.2); font-size: 11px; }
        .price-card h3 { margin: 0; font-size: 18px; }
        .price { margin: 20px 0; font-size: 34px; font-weight: 800; }
        .price small { color: var(--muted); font-size: 12px; font-weight: 400; }
        .price-list { margin: 0 0 23px; padding: 0; list-style: none; color: var(--muted); font-size: 13px; }
        .price-list li { margin: 9px 0; }
        .price-list i { color: #69e4c7; margin-right: 7px; }

        .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .quote-card { padding: 27px; }
        .stars { color: #ffd46a; font-size: 13px; letter-spacing: 3px; }
        .quote-card blockquote { margin: 18px 0; color: #e6e9f8; font-size: 15px; line-height: 1.8; }
        .quote-user { display: flex; align-items: center; gap: 11px; color: var(--muted); font-size: 13px; }
        .avatar { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(135deg, #6679ff, #43c8ed); font-weight: 800; }

        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
        .faq-item { padding: 21px 23px; }
        .faq-item h3 { display: flex; justify-content: space-between; gap: 20px; margin: 0; font-size: 16px; }
        .faq-item h3 i { color: var(--cyan); font-size: 13px; margin-top: 5px; }
        .faq-item p { margin: 12px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

        .final-cta { padding: 75px 0; background: linear-gradient(120deg, #1b275c, #18224a 45%, #102c4a); border-top: 1px solid var(--line); }
        .cta-box { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
        .cta-box h2 { margin: 0 0 10px; font-size: clamp(28px, 4vw, 44px); line-height: 1.2; }
        .cta-box p { margin: 0; color: #c7cfee; max-width: 650px; }
        footer { padding: 47px 0 25px; background: #070b19; border-top: 1px solid rgba(255,255,255,.07); }
        .footer-top { display: flex; justify-content: space-between; gap: 30px; padding-bottom: 35px; }
        .footer-brand p { max-width: 340px; margin: 16px 0 0; color: var(--muted); font-size: 13px; }
        .footer-links { display: flex; gap: 35px; color: var(--muted); font-size: 13px; }
        .footer-links a:hover { color: #fff; }
        .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; color: #6f7898; border-top: 1px solid rgba(255,255,255,.07); font-size: 12px; }

        @media (max-width: 1024px) {
            .hero-grid, .split { gap: 35px; }
            .hero h1 { font-size: clamp(42px, 7vw, 65px); }
            .service-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
            .security-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: 1fr 1fr; }
            .news-card.featured { grid-column: span 2; }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 30px, 620px); }
            .nav-wrap { height: 68px; }
            .nav-links { display: none; }
            .nav-download { min-height: 40px; padding: 0 14px; }
            .hero { min-height: auto; padding: 66px 0 82px; }
            .hero-grid, .split { grid-template-columns: 1fr; }
            .hero-art { margin: 18px 12px 0; }
            .hero-panel { left: -12px; bottom: -20px; }
            .section { padding: 76px 0; }
            .kpi-grid { grid-template-columns: repeat(2, 1fr); }
            .timeline { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
            .timeline:before { display: none; }
            .faq-grid { grid-template-columns: 1fr; }
            .cta-box, .footer-top, .footer-bottom { flex-direction: column; align-items: flex-start; }
            .footer-links { flex-wrap: wrap; gap: 14px 25px; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 43px; }
            .hero-copy { font-size: 16px; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .hero-actions a { width: 100%; }
            .kpi-grid, .service-grid, .price-grid, .security-grid, .quotes, .news-grid { grid-template-columns: 1fr; }
            .news-card.featured { grid-column: auto; }
            .timeline { grid-template-columns: 1fr; }
            .compare-box { padding: 19px; }
            .compare-row { font-size: 12px; gap: 7px; }
            .section-heading { margin-bottom: 30px; }
        }