/* roulang page: index */
:root {
            --bg: #070b16;
            --bg-soft: #0d1324;
            --panel: #11192c;
            --panel-light: #17223a;
            --text: #f5f7ff;
            --muted: #99a6c5;
            --muted-strong: #c3cee4;
            --line: rgba(157, 175, 224, .16);
            --primary: #6478ff;
            --primary-deep: #4056df;
            --cyan: #59d9e8;
            --green: #50d39d;
            --orange: #ffb56b;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --shadow: 0 24px 70px rgba(0, 0, 0, .28);
            --container: 1180px;
        }

        html { scroll-behavior: smooth; }
        *, *::before, *::after { box-sizing: border-box; }
        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            background:
                radial-gradient(circle at 75% 12%, rgba(83, 99, 255, .13), transparent 26%),
                radial-gradient(circle at 8% 38%, rgba(46, 191, 225, .07), transparent 24%);
            z-index: -1;
        }
        a { color: inherit; text-decoration: none; transition: color .25s ease, background .25s ease, border-color .25s ease, transform .25s ease; }
        img { display: block; max-width: 100%; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(89, 217, 232, .72); outline-offset: 3px; }
        .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
        .section { padding: 108px 0; position: relative; }
        .section-soft { background: rgba(16, 23, 42, .62); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
        .section-head { max-width: 720px; margin-bottom: 48px; }
        .section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .12em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--cyan); }
        h1, h2, h3, p { margin-top: 0; }
        h1, h2, h3 { letter-spacing: -.035em; line-height: 1.2; }
        h1 { font-size: clamp(42px, 6vw, 78px); margin-bottom: 26px; }
        h2 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 18px; }
        h3 { font-size: 21px; margin-bottom: 12px; }
        .section-head p, .hero-copy p { color: var(--muted); }
        .section-head p { font-size: 17px; max-width: 680px; }
        .announcement {
            min-height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            background: #101a37;
            border-bottom: 1px solid rgba(112, 133, 255, .16);
            color: #cfd7ff;
            font-size: 13px;
        }
        .announcement i { color: var(--cyan); margin-right: 8px; }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(7, 11, 22, .82);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--line);
        }
        .nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
        .brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; white-space: nowrap; }
        .brand-mark {
            width: 38px; height: 38px; display: grid; place-items: center;
            border-radius: 12px; color: #fff;
            background: linear-gradient(145deg, var(--primary), #8e71ff);
            box-shadow: 0 8px 25px rgba(100, 120, 255, .3);
        }
        .brand-name { font-size: 17px; }
        .main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
        .main-nav a { color: var(--muted-strong); font-size: 14px; }
        .main-nav a:hover, .main-nav a.active { color: #fff; }
        .nav-tools { display: flex; align-items: center; gap: 12px; }
        .nav-download { padding: 10px 17px !important; font-size: 13px !important; }
        .menu-toggle { display: none; color: #fff; border: 1px solid var(--line); background: transparent; border-radius: 10px; width: 42px; height: 42px; }
        .button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 9px;
            min-height: 48px;
            padding: 12px 21px;
            border-radius: 13px;
            border: 1px solid transparent;
            font-weight: 700;
            font-size: 14px;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
        }
        .button:hover { transform: translateY(-2px); }
        .button-primary { background: var(--primary); color: #fff; box-shadow: 0 12px 30px rgba(100, 120, 255, .25); }
        .button-primary:hover { background: #7788ff; color: #fff; box-shadow: 0 15px 35px rgba(100, 120, 255, .38); }
        .button-ghost { background: rgba(255,255,255,.035); border-color: var(--line); color: #e4e9fa; }
        .button-ghost:hover { border-color: rgba(100, 120, 255, .65); background: rgba(100, 120, 255, .1); color: #fff; }
        .hero {
            padding: 90px 0 84px;
            background:
                linear-gradient(120deg, rgba(9, 14, 29, .9), rgba(9, 14, 29, .45)),
                radial-gradient(circle at 82% 36%, rgba(82, 99, 255, .2), transparent 28%);
        }
        .hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 68px; }
        .hero-copy { max-width: 670px; }
        .hero-copy h1 span { color: #8997ff; }
        .hero-copy p { max-width: 630px; font-size: 18px; line-height: 1.9; margin-bottom: 31px; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-bottom: 28px; }
        .hero-note { display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 13px; }
        .hero-note span { display: inline-flex; align-items: center; gap: 7px; }
        .hero-note i { color: var(--green); }
        .hero-panel {
            position: relative;
            min-height: 420px;
            padding: 24px;
            border: 1px solid rgba(135, 153, 255, .24);
            border-radius: 30px;
            background: linear-gradient(145deg, rgba(27, 39, 73, .9), rgba(13, 19, 37, .92));
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .hero-panel::after {
            content: "";
            position: absolute;
            width: 240px; height: 240px; right: -90px; top: -80px;
            border-radius: 50%;
            background: rgba(89, 217, 232, .1);
            filter: blur(5px);
        }
        .panel-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
        .panel-label { color: var(--muted); font-size: 13px; }
        .live { display: inline-flex; gap: 7px; align-items: center; color: var(--green); font-size: 12px; }
        .live::before { content: ""; width: 7px; height: 7px; background: var(--green); border-radius: 50%; box-shadow: 0 0 0 5px rgba(80,211,157,.12); }
        .signal-card { margin: 26px 0; padding: 18px; border-radius: 17px; background: rgba(255,255,255,.055); border: 1px solid rgba(255,255,255,.08); }
        .signal-row { display: flex; justify-content: space-between; gap: 14px; align-items: center; margin-bottom: 10px; }
        .signal-row strong { font-size: 22px; }
        .signal-row small { color: var(--muted); font-size: 12px; }
        .progress { height: 7px; border-radius: 9px; background: rgba(255,255,255,.09); overflow: hidden; }
        .progress span { display: block; height: 100%; width: 78%; border-radius: inherit; background: linear-gradient(90deg, var(--cyan), var(--primary)); }
        .rank-list { display: grid; gap: 10px; }
        .rank-item { display: grid; grid-template-columns: 28px 1fr auto; gap: 12px; align-items: center; padding: 13px 12px; border-radius: 13px; background: rgba(255,255,255,.035); }
        .rank-number { color: var(--cyan); font-weight: 800; }
        .rank-name { font-size: 14px; }
        .rank-meta { color: var(--muted); font-size: 12px; }
        .rank-status { color: var(--green); font-size: 12px; }
        .ticker { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 15px 0; overflow: hidden; background: rgba(16,23,42,.48); }
        .ticker-track { display: flex; min-width: max-content; gap: 42px; animation: ticker 26s linear infinite; color: var(--muted-strong); font-size: 13px; }
        .ticker-track span { display: inline-flex; align-items: center; gap: 10px; }
        .ticker-track i { color: var(--cyan); font-size: 10px; }
        @keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-35%); } }
        .entry-bar { display: flex; align-items: center; gap: 12px; max-width: 800px; margin: 0 auto; padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.04); }
        .entry-bar i { color: var(--muted); margin-left: 10px; }
        .entry-bar input { flex: 1; min-width: 0; background: transparent; border: 0; color: #fff; box-shadow: none; margin: 0; padding: 9px 4px; }
        .entry-bar input::placeholder { color: #7885a5; }
        .entry-bar input:focus { background: transparent; border: 0; box-shadow: none; }
        .entry-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 18px; }
        .tag { border: 1px solid var(--line); border-radius: 50px; padding: 7px 13px; color: var(--muted-strong); font-size: 13px; background: rgba(255,255,255,.025); }
        .tag:hover { color: #fff; border-color: var(--primary); background: rgba(100,120,255,.1); }
        .matrix { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .matrix-item { padding: 23px; min-height: 150px; border: 1px solid var(--line); border-radius: var(--radius-md); background: rgba(17,25,44,.65); transition: transform .25s ease, border-color .25s ease, background .25s ease; }
        .matrix-item:hover { transform: translateY(-5px); border-color: rgba(100,120,255,.58); background: var(--panel-light); }
        .matrix-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; margin-bottom: 18px; color: var(--cyan); background: rgba(89,217,232,.1); }
        .matrix-item h3 { font-size: 17px; margin-bottom: 7px; }
        .matrix-item p { color: var(--muted); font-size: 13px; line-height: 1.65; margin: 0; }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .feature-card { min-height: 250px; padding: 28px; border-radius: var(--radius-lg); border: 1px solid var(--line); background: linear-gradient(145deg, rgba(20,30,54,.85), rgba(13,19,35,.8)); transition: transform .28s ease, border-color .28s ease, box-shadow .28s ease; }
        .feature-card:hover { transform: translateY(-7px); border-color: rgba(100,120,255,.62); box-shadow: 0 20px 45px rgba(0,0,0,.2); }
        .feature-card .icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; background: rgba(100,120,255,.13); color: #9ca8ff; font-size: 20px; margin-bottom: 28px; }
        .feature-card p { color: var(--muted); font-size: 14px; line-height: 1.8; }
        .feature-card .micro { color: var(--cyan); font-size: 12px; font-weight: 700; }
        .split { display: grid; grid-template-columns: .85fr 1.15fr; gap: 70px; align-items: center; }
        .node-map { min-height: 390px; position: relative; border: 1px solid var(--line); border-radius: 30px; background: radial-gradient(circle at 50% 45%, rgba(100,120,255,.2), transparent 28%), #0b1224; overflow: hidden; }
        .node-map::before, .node-map::after { content: ""; position: absolute; inset: 18%; border: 1px dashed rgba(120,143,255,.25); border-radius: 50%; transform: rotate(-18deg); }
        .node-map::after { inset: 30%; transform: rotate(35deg); }
        .map-core { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 88px; height: 88px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(145deg, var(--primary), #876dff); box-shadow: 0 0 0 16px rgba(100,120,255,.1), 0 0 65px rgba(100,120,255,.5); z-index: 2; }
        .node { position: absolute; display: flex; align-items: center; gap: 7px; padding: 8px 11px; border: 1px solid rgba(120,143,255,.25); border-radius: 10px; background: rgba(16,25,48,.9); color: var(--muted-strong); font-size: 12px; z-index: 3; }
        .node::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
        .node-a { top: 16%; left: 13%; } .node-b { top: 20%; right: 12%; } .node-c { bottom: 16%; left: 17%; } .node-d { bottom: 19%; right: 14%; }
        .check-list { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 15px; }
        .check-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--muted-strong); font-size: 14px; }
        .check-list i { color: var(--green); margin-top: 5px; }
        .scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .scenario { min-height: 200px; padding: 24px; border-left: 2px solid var(--primary); background: rgba(255,255,255,.035); border-radius: 0 18px 18px 0; }
        .scenario h3 { font-size: 18px; }
        .scenario p { color: var(--muted); font-size: 13px; line-height: 1.75; }
        .compare-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 22px; background: rgba(17,25,44,.62); }
        .compare-table { width: 100%; min-width: 650px; border-collapse: collapse; margin: 0; background: transparent; color: var(--muted-strong); }
        .compare-table th, .compare-table td { padding: 20px 23px; border-bottom: 1px solid var(--line); text-align: left; }
        .compare-table th { color: #fff; font-size: 14px; background: rgba(255,255,255,.035); }
        .compare-table th:nth-child(2) { color: var(--cyan); }
        .compare-table tr:last-child td { border-bottom: 0; }
        .compare-table td { font-size: 14px; }
        .compare-table i { margin-right: 8px; color: var(--green); }
        .compare-table .muted-icon { color: #6b7694; }
        .plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .plan { padding: 25px; border-radius: 22px; border: 1px solid var(--line); background: rgba(17,25,44,.72); position: relative; }
        .plan.featured { border-color: rgba(100,120,255,.72); box-shadow: 0 17px 45px rgba(45,58,145,.2); transform: translateY(-7px); }
        .plan-badge { position: absolute; top: 16px; right: 16px; padding: 4px 9px; border-radius: 50px; color: #bfc7ff; font-size: 11px; background: rgba(100,120,255,.18); }
        .plan h3 { font-size: 18px; }
        .plan-desc { color: var(--muted); font-size: 13px; min-height: 48px; }
        .price { margin: 20px 0; font-size: 34px; font-weight: 800; letter-spacing: -.04em; }
        .price small { color: var(--muted); font-size: 12px; font-weight: 400; }
        .plan ul { min-height: 126px; list-style: none; margin: 0 0 20px; padding: 0; color: var(--muted-strong); font-size: 13px; }
        .plan li { margin-bottom: 9px; }
        .plan li i { color: var(--green); width: 18px; }
        .plan .button { width: 100%; }
        .stage { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: stretch; }
        .stage-copy { padding: 35px; border-radius: 25px; border: 1px solid var(--line); background: rgba(17,25,44,.72); }
        .stage-copy p { color: var(--muted); font-size: 15px; }
        .dashboard { position: relative; padding: 24px; border-radius: 25px; border: 1px solid rgba(100,120,255,.3); background: #0b1223; box-shadow: var(--shadow); }
        .dash-bar { display: flex; gap: 7px; padding-bottom: 19px; border-bottom: 1px solid var(--line); }
        .dash-bar span { width: 8px; height: 8px; border-radius: 50%; background: #ff6f7e; }
        .dash-bar span:nth-child(2) { background: #ffcc6a; } .dash-bar span:nth-child(3) { background: #58d6a1; }
        .dash-content { display: grid; grid-template-columns: 1fr 1.35fr; gap: 13px; padding-top: 20px; }
        .dash-side, .dash-main { padding: 16px; border-radius: 14px; background: rgba(255,255,255,.045); }
        .dash-side div { height: 11px; margin-bottom: 13px; border-radius: 8px; background: rgba(255,255,255,.1); }
        .dash-side div:first-child { width: 78%; background: rgba(100,120,255,.6); }
        .dash-main strong { display: block; font-size: 25px; margin-bottom: 13px; }
        .chart { height: 100px; display: flex; align-items: flex-end; gap: 7px; padding-top: 15px; }
        .chart i { flex: 1; display: block; border-radius: 6px 6px 2px 2px; background: linear-gradient(var(--cyan), var(--primary)); opacity: .84; }
        .chart i:nth-child(1) { height: 35%; } .chart i:nth-child(2) { height: 58%; } .chart i:nth-child(3) { height: 48%; } .chart i:nth-child(4) { height: 79%; } .chart i:nth-child(5) { height: 68%; } .chart i:nth-child(6) { height: 91%; }
        .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; border: 1px solid var(--line); border-radius: 22px; overflow: hidden; background: var(--line); }
        .stat { padding: 30px 22px; background: rgba(17,25,44,.9); text-align: center; }
        .stat strong { display: block; color: #fff; font-size: 34px; letter-spacing: -.05em; }
        .stat span { color: var(--muted); font-size: 13px; }
        .quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
        .quote { padding: 26px; border-radius: 21px; background: rgba(255,255,255,.04); border: 1px solid var(--line); }
        .quote-stars { color: #ffd172; letter-spacing: 3px; margin-bottom: 18px; }
        .quote p { color: var(--muted-strong); font-size: 14px; line-height: 1.85; }
        .quote-author { display: flex; align-items: center; gap: 11px; margin-top: 24px; font-size: 13px; }
        .avatar { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(145deg, #6478ff, #41c8db); font-size: 12px; font-weight: 800; }
        .quote-author small { display: block; color: var(--muted); }
        .resource-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
        .resource-main, .resource-list { border: 1px solid var(--line); border-radius: 22px; background: rgba(17,25,44,.7); }
        .resource-main { padding: 30px; }
        .resource-main .resource-label, .article-label { color: var(--cyan); font-size: 12px; font-weight: 700; }
        .resource-main h3 { font-size: 25px; margin-top: 14px; }
        .resource-main p { color: var(--muted); font-size: 14px; }
        .resource-list { padding: 8px 22px; }
        .resource-item { display: flex; justify-content: space-between; gap: 18px; align-items: center; padding: 19px 0; border-bottom: 1px solid var(--line); }
        .resource-item:last-child { border-bottom: 0; }
        .resource-item strong { display: block; font-size: 14px; }
        .resource-item span { color: var(--muted); font-size: 12px; }
        .resource-item i { color: var(--muted); }
        .faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
        .faq-item { padding: 22px 24px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.035); }
        .faq-item summary { cursor: pointer; color: #f6f8ff; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 15px; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after { content: "+"; color: var(--cyan); font-size: 22px; line-height: 1; }
        .faq-item[open] summary::after { content: "−"; }
        .faq-item p { color: var(--muted); font-size: 14px; margin: 15px 0 0; line-height: 1.8; }
        .cta {
            padding: 75px 0;
            background: linear-gradient(120deg, rgba(55,70,184,.45), rgba(17,25,44,.82));
            border-top: 1px solid rgba(130,145,255,.2);
            border-bottom: 1px solid rgba(130,145,255,.2);
        }
        .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
        .cta h2 { max-width: 640px; margin-bottom: 10px; }
        .cta p { color: #c3cbea; margin-bottom: 0; max-width: 650px; }
        .site-footer { padding: 58px 0 26px; background: #050812; }
        .footer-top { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 38px; padding-bottom: 44px; }
        .footer-brand p { color: var(--muted); max-width: 300px; font-size: 13px; margin-top: 17px; }
        .footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 17px; }
        .footer-col a, .footer-col span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 10px; }
        .footer-col a:hover { color: var(--cyan); }
        .footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-top: 22px; border-top: 1px solid var(--line); color: #6f7b9b; font-size: 12px; }
        .footer-social { display: flex; gap: 13px; }
        .footer-social a { color: #8b96b4; }
        .footer-social a:hover { color: #fff; }
        @media (max-width: 1024px) {
            .hero-grid, .split { gap: 38px; }
            .matrix, .scenario-grid { grid-template-columns: repeat(2, 1fr); }
            .plans { grid-template-columns: repeat(2, 1fr); }
            .footer-top { grid-template-columns: 1.3fr repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .container { width: min(100% - 30px, var(--container)); }
            .section { padding: 75px 0; }
            .nav-wrap { min-height: 68px; }
            .menu-toggle { display: block; }
            .main-nav { display: none; position: absolute; top: 68px; left: 15px; right: 15px; flex-direction: column; align-items: stretch; gap: 0; padding: 10px; border: 1px solid var(--line); border-radius: 16px; background: rgba(13,19,36,.98); box-shadow: var(--shadow); }
            .main-nav.is-open { display: flex; }
            .main-nav a { padding: 12px 14px; border-radius: 9px; }
            .main-nav a:hover { background: rgba(100,120,255,.1); }
            .nav-tools .nav-download { display: none; }
            .hero { padding: 65px 0; }
            .hero-grid, .split, .stage, .resource-grid { grid-template-columns: 1fr; }
            .hero-panel { min-height: 370px; }
            .feature-grid, .quote-grid { grid-template-columns: 1fr; }
            .stats { grid-template-columns: repeat(2, 1fr); }
            .cta-inner { display: block; }
            .cta .button { margin-top: 24px; }
            .footer-top { grid-template-columns: repeat(2, 1fr); }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            h1 { font-size: 43px; }
            h2 { font-size: 32px; }
            .brand-name { font-size: 15px; }
            .hero-copy p { font-size: 16px; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .hero-actions .button { width: 100%; }
            .matrix, .scenario-grid, .plans, .faq-grid { grid-template-columns: 1fr; }
            .plan.featured { transform: none; }
            .node-map { min-height: 315px; }
            .node-a { left: 7%; } .node-b { right: 7%; } .node-c { left: 7%; } .node-d { right: 7%; }
            .dashboard { padding: 15px; }
            .dash-content { grid-template-columns: 1fr; }
            .stats strong { font-size: 28px; }
            .footer-top { grid-template-columns: 1fr 1fr; gap: 24px 18px; }
            .footer-bottom { display: block; }
            .footer-social { margin-top: 12px; }
            .entry-bar .button { padding-left: 13px; padding-right: 13px; }
        }