/* roulang page: index */
:root {
            --blue: #2f6bff;
            --blue-deep: #1e4fd0;
            --blue-soft: #eaf1ff;
            --cyan-soft: #eaf8fb;
            --ink: #17243d;
            --muted: #66738b;
            --line: #dfe7f3;
            --paper: #ffffff;
            --page: #f7faff;
            --warm: #fffaf3;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow: 0 16px 42px rgba(45, 84, 150, .10);
            --shadow-hover: 0 22px 52px rgba(45, 84, 150, .17);
            --max: 1180px;
            --section: 104px;
        }

        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--page);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            padding-bottom: 0;
        }
        a { color: inherit; text-decoration: none; transition: color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease; }
        img { display: block; max-width: 100%; height: auto; }
        button, input, select { font: inherit; }
        button, .button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(47,107,255,.34); outline-offset: 3px; }
        .container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--blue);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .08em;
        }
        .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--blue); }
        h1, h2, h3, p { margin-top: 0; }
        h1, h2, h3 { line-height: 1.25; letter-spacing: -.035em; }
        h1 { font-size: clamp(36px, 5vw, 64px); margin-bottom: 24px; }
        h2 { font-size: clamp(28px, 3.4vw, 42px); margin-bottom: 18px; }
        h3 { font-size: 20px; margin-bottom: 10px; }
        .section { padding: var(--section) 0; }
        .section-head { max-width: 680px; margin-bottom: 42px; }
        .section-head p { color: var(--muted); margin-bottom: 0; font-size: 17px; }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(255,255,255,.94);
            border-bottom: 1px solid rgba(223,231,243,.9);
            backdrop-filter: blur(12px);
        }
        .nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
        .brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; font-size: 18px; white-space: nowrap; }
        .brand-mark {
            width: 38px; height: 38px; display: grid; place-items: center;
            color: #fff; background: var(--blue); border-radius: 12px;
            box-shadow: 0 8px 18px rgba(47,107,255,.25); font-size: 16px;
        }
        .desktop-nav { display: flex; align-items: center; gap: 8px; }
        .desktop-nav a {
            position: relative; min-height: 44px; display: inline-flex; align-items: center;
            padding: 0 15px; color: var(--muted); font-size: 14px; font-weight: 600; border-radius: 9px;
        }
        .desktop-nav a:hover { color: var(--blue); background: var(--blue-soft); }
        .desktop-nav a.active { color: var(--blue); }
        .desktop-nav a.active::after { content: ""; position: absolute; left: 15px; right: 15px; bottom: 3px; height: 2px; background: var(--blue); border-radius: 2px; }
        .nav-action { color: var(--blue) !important; border: 1px solid #cddcff; margin-left: 6px; }
        .nav-action:hover { color: #fff !important; background: var(--blue) !important; }

        .hero { padding: 92px 0 78px; background: linear-gradient(180deg, #fff 0%, #f7faff 100%); }
        .hero-grid { display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(420px, .97fr); gap: 74px; align-items: center; }
        .hero-copy { max-width: 650px; }
        .hero-copy h1 span { color: var(--blue); }
        .hero-copy > p { max-width: 610px; color: var(--muted); font-size: 18px; margin-bottom: 30px; }
        .actions { display: flex; flex-wrap: wrap; gap: 13px; align-items: center; }
        .button {
            display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
            padding: 0 21px; border-radius: 10px; border: 1px solid transparent;
            font-size: 15px; font-weight: 700; transition: .22s ease;
        }
        .button.primary { color: #fff; background: var(--blue); box-shadow: 0 10px 22px rgba(47,107,255,.22); }
        .button.primary:hover { color: #fff; background: var(--blue-deep); transform: translateY(-2px); box-shadow: 0 15px 28px rgba(47,107,255,.28); }
        .button.secondary { color: var(--blue); background: #fff; border-color: #cbd9f4; }
        .button.secondary:hover { background: var(--blue-soft); border-color: #a9c0f7; transform: translateY(-2px); }
        .button:active { transform: translateY(0); }
        .hero-note { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
        .tag, .badge {
            display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px;
            border: 1px solid #cbdafa; border-radius: 99px; color: #3560bd; background: var(--blue-soft);
            font-size: 12px; font-weight: 700;
        }
        .badge { color: #25757f; border-color: #c8e8eb; background: var(--cyan-soft); }
        .hero-panel {
            position: relative; padding: 26px; min-height: 390px; overflow: hidden;
            background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow);
        }
        .panel-top { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 13px; }
        .status-dot { display: inline-flex; align-items: center; gap: 7px; }
        .status-dot::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #37b889; box-shadow: 0 0 0 5px #e7f8f1; }
        .index-board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 28px; }
        .index-item { min-height: 106px; padding: 15px; background: #f8fbff; border: 1px solid #e4ecf8; border-radius: 14px; }
        .index-item strong { display: block; color: var(--blue); font-size: 24px; margin-bottom: 8px; }
        .index-item span { display: block; color: var(--muted); font-size: 13px; line-height: 1.45; }
        .panel-feature { margin-top: 20px; padding: 20px; border-radius: 16px; color: #fff; background: #203d86; }
        .panel-feature small { color: #b8caff; }
        .panel-feature h3 { margin: 8px 0 5px; color: #fff; }
        .panel-feature p { margin: 0; color: #d7e1ff; font-size: 14px; }
        .scan-line { height: 5px; margin-top: 18px; border-radius: 5px; background: #4367c1; overflow: hidden; }
        .scan-line::after { content: ""; display: block; width: 68%; height: 100%; background: #91d9ff; border-radius: inherit; }

        .pain { background: #eef5ff; }
        .story-list { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0; border-top: 1px solid #cfe0fb; }
        .story-item { padding: 28px 28px 26px 0; border-bottom: 1px solid #cfe0fb; }
        .story-item + .story-item { padding-left: 28px; border-left: 1px solid #cfe0fb; }
        .story-number { color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
        .story-item p { color: var(--muted); font-size: 14px; margin-bottom: 0; }

        .solution-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: stretch; }
        .feature-card { padding: 34px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
        .feature-card .tag { margin-bottom: 22px; }
        .feature-card p { color: var(--muted); }
        .feature-meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 13px; padding-top: 18px; border-top: 1px solid var(--line); margin-top: 24px; }
        .entry-list { display: flex; flex-direction: column; gap: 12px; }
        .entry {
            display: flex; align-items: center; gap: 16px; padding: 20px;
            background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md);
            box-shadow: 0 8px 24px rgba(45,84,150,.06);
        }
        .entry:hover, .quote:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: #b9cdf3; }
        .entry-icon { width: 42px; height: 42px; flex: 0 0 42px; display: grid; place-items: center; color: var(--blue); background: var(--blue-soft); border-radius: 12px; font-weight: 800; }
        .entry h3 { font-size: 16px; margin: 0 0 3px; }
        .entry p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.5; }

        .result { background: var(--warm); }
        .result-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 72px; align-items: center; }
        .result-number { color: var(--blue); font-size: clamp(58px, 8vw, 96px); font-weight: 800; line-height: 1; letter-spacing: -.08em; }
        .result-number small { display: block; color: var(--ink); font-size: 18px; letter-spacing: 0; margin-top: 14px; }
        .progress-group { display: grid; gap: 22px; }
        .progress-label { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 8px; }
        .progress-label span:last-child { color: var(--blue); font-weight: 700; }
        .progress { height: 9px; margin: 0; background: #e7e8ed; border-radius: 99px; }
        .progress-meter { background: var(--blue); border-radius: inherit; }

        .voices { background: #fff; }
        .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .quote { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #fff; transition: .22s ease; }
        .quote blockquote { margin: 0 0 20px; color: var(--ink); font-size: 16px; line-height: 1.75; }
        .quote blockquote::before { content: "“"; color: var(--blue); font-size: 38px; line-height: .4; vertical-align: -10px; margin-right: 4px; }
        .quote cite { color: var(--muted); font-size: 13px; font-style: normal; }

        .faq-section { padding-top: 78px; }
        .accordion { margin: 0; background: transparent; border: 0; }
        .accordion-item { margin-bottom: 10px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; }
        .accordion-title { color: var(--ink); font-weight: 700; border: 0; padding: 19px 22px; }
        .accordion-title:hover { color: var(--blue); background: #f7faff; }
        .accordion-content { color: var(--muted); border: 0; padding: 0 22px 20px; font-size: 14px; }
        .accordion-content.is-active { display: block; }

        .cta { padding: 58px 0; }
        .cta-box { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 42px 48px; background: var(--blue-soft); border: 1px solid #cfddfb; border-radius: var(--radius-lg); }
        .cta-box h2 { margin-bottom: 8px; font-size: 32px; }
        .cta-box p { margin-bottom: 0; color: var(--muted); }

        .site-footer { padding: 48px 0 34px; background: #182846; color: #dbe5fb; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 34px; border-bottom: 1px solid rgba(219,229,251,.16); }
        .footer-brand { color: #fff; margin-bottom: 14px; }
        .footer-text { max-width: 370px; color: #aabbdc; font-size: 14px; }
        .footer-title { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: 14px; }
        .footer-links { display: grid; gap: 8px; color: #aabbdc; font-size: 14px; }
        .footer-links a:hover { color: #fff; }
        .copyright { display: flex; justify-content: space-between; gap: 18px; padding-top: 24px; color: #8ea3c8; font-size: 12px; }

        .mobile-tabs { display: none; }
        @media (max-width: 900px) {
            :root { --section: 78px; }
            .hero-grid, .solution-grid, .result-grid { grid-template-columns: 1fr; gap: 36px; }
            .hero { padding-top: 70px; }
            .hero-panel { max-width: 680px; }
            .story-list { grid-template-columns: 1fr; }
            .story-item, .story-item + .story-item { padding: 24px 0; border-left: 0; }
            .quotes { grid-template-columns: 1fr; }
            .quote { max-width: 650px; }
        }
        @media (max-width: 640px) {
            body { padding-bottom: 76px; }
            .container { width: min(var(--max), calc(100% - 32px)); }
            .desktop-nav { display: none; }
            .nav-wrap { min-height: 68px; }
            .brand { font-size: 15px; gap: 8px; }
            .brand-mark { width: 32px; height: 32px; border-radius: 9px; }
            .hero { padding: 58px 0 54px; }
            h1 { font-size: 38px; }
            .hero-copy > p { font-size: 16px; }
            .hero-panel { padding: 19px; min-height: 350px; }
            .index-board { gap: 8px; }
            .index-item { min-height: 92px; padding: 11px; }
            .index-item strong { font-size: 20px; }
            .index-item span { font-size: 11px; }
            .feature-card { padding: 24px; }
            .result-grid { gap: 24px; }
            .cta-box { display: block; padding: 29px 24px; }
            .cta-box .button { margin-top: 22px; width: 100%; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-grid > :first-child { grid-column: 1 / -1; }
            .copyright { display: block; }
            .copyright span { display: block; margin-top: 5px; }
            .mobile-tabs {
                position: fixed; display: grid; grid-template-columns: repeat(4, 1fr);
                left: 0; right: 0; bottom: 0; z-index: 30; min-height: 70px;
                padding: 7px 8px calc(7px + env(safe-area-inset-bottom));
                background: rgba(255,255,255,.97); border-top: 1px solid var(--line);
                box-shadow: 0 -8px 24px rgba(29,55,99,.10);
            }
            .mobile-tabs a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--muted); font-size: 11px; font-weight: 600; border-radius: 9px; }
            .mobile-tabs a span:first-child { font-size: 18px; line-height: 1.1; }
            .mobile-tabs a:hover, .mobile-tabs a.active { color: var(--blue); background: var(--blue-soft); }
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
        }

/* roulang page: category1 */
:root {
      --blue:#2f6bff;
      --blue-deep:#1e4fd0;
      --blue-soft:#eaf1ff;
      --cyan-soft:#eaf8fb;
      --ink:#17243d;
      --muted:#66738b;
      --line:#dfe7f3;
      --paper:#fff;
      --page:#f7faff;
      --warm:#fffaf3;
      --radius-lg:24px;
      --radius-md:16px;
      --radius-sm:10px;
      --shadow:0 16px 42px rgba(45,84,150,.10);
      --shadow-hover:0 22px 52px rgba(45,84,150,.17);
      --max:1180px;
      --section:82px;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--page);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.75;padding-bottom:0}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.04em;margin-bottom:22px}
    h2{font-size:clamp(28px,3vw,40px);line-height:1.3;letter-spacing:-.025em;margin-bottom:16px}
    h3{font-size:20px;line-height:1.4;margin-bottom:10px}
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease}
    img{display:block;max-width:100%;height:auto}
    button,input,select{font:inherit}
    button,.button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--blue)}
    .section{padding:var(--section) 0}
    .section-head{max-width:700px;margin-bottom:38px}
    .section-head p{color:var(--muted);font-size:17px;margin-bottom:0}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);border-bottom:1px solid rgba(223,231,243,.9);backdrop-filter:blur(12px)}
    .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:26px}
    .brand{display:inline-flex;align-items:center;gap:12px;font-weight:800;font-size:18px;white-space:nowrap}
    .brand-mark{width:38px;height:38px;display:grid;place-items:center;color:#fff;background:var(--blue);border-radius:12px;box-shadow:0 8px 18px rgba(47,107,255,.25);font-size:16px}
    .desktop-nav{display:flex;align-items:center;gap:8px}
    .desktop-nav a{position:relative;min-height:44px;display:inline-flex;align-items:center;padding:0 15px;color:var(--muted);font-size:14px;font-weight:600;border-radius:9px}
    .desktop-nav a:hover{color:var(--blue);background:var(--blue-soft)}
    .desktop-nav a.active{color:var(--blue)}
    .desktop-nav a.active:after{content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;background:var(--blue);border-radius:2px}
    .nav-action{color:var(--blue)!important;border:1px solid #cddcff;margin-left:6px}
    .nav-action:hover{color:#fff!important;background:var(--blue)!important}
    .page-intro{padding:78px 0 64px;background:linear-gradient(180deg,#fff 0%,#f7faff 100%)}
    .crumbs{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:28px}
    .crumbs a:hover{color:var(--blue)}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:end}
    .intro-copy p{max-width:700px;color:var(--muted);font-size:18px;margin-bottom:0}
    .intro-note{padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow)}
    .intro-note strong{display:block;font-size:25px;margin-bottom:7px}
    .intro-note span{display:block;color:var(--muted);font-size:14px}
    .featured{padding-top:34px}
    .feature-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:22px}
    .feature-main,.feature-small{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);transition:.22s ease}
    .feature-main{padding:36px;min-height:310px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(135deg,#fff 55%,#edf4ff)}
    .feature-main:hover,.feature-small:hover,.topic-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
    .feature-main p,.feature-small p{color:var(--muted);font-size:15px}
    .feature-side{display:grid;gap:22px}
    .feature-small{padding:25px}
    .feature-small h3{font-size:18px}
    .tag,.badge{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border:1px solid #cbdafa;border-radius:99px;color:#3560bd;background:var(--blue-soft);font-size:12px;font-weight:700}
    .badge{color:#25757f;border-color:#c8e8eb;background:var(--cyan-soft)}
    .button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:10px;border:1px solid transparent;font-size:15px;font-weight:700;transition:.22s ease}
    .button.primary{color:#fff;background:var(--blue);box-shadow:0 10px 22px rgba(47,107,255,.22)}
    .button.primary:hover{color:#fff;background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 15px 28px rgba(47,107,255,.28)}
    .button.secondary{color:var(--blue);background:#fff;border-color:#cbd9f4}
    .button.secondary:hover{background:var(--blue-soft);border-color:#a9c0f7;transform:translateY(-2px)}
    .button:active{transform:translateY(0)}
    .topic-area{background:#eef5ff}
    .filter-bar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding:18px 20px;margin-bottom:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:0 8px 24px rgba(45,84,150,.06)}
    .filter-label{font-weight:700;font-size:14px;margin-right:4px}
    .filter-bar select{height:42px;border:1px solid #cbd9f4;border-radius:9px;color:var(--ink);background:#fff;padding:0 34px 0 12px;outline:0}
    .filter-bar select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,107,255,.14)}
    .topic-list{display:grid;gap:14px}
    .topic-row{display:grid;grid-template-columns:82px 1fr auto;gap:24px;align-items:center;padding:24px 26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);transition:.22s ease}
    .topic-no{color:var(--blue);font-size:27px;font-weight:800}
    .topic-row p{color:var(--muted);font-size:14px;margin:0;max-width:680px}
    .topic-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
    .topic-link{color:var(--blue);font-size:14px;font-weight:700;white-space:nowrap}
    .topic-link:hover{color:var(--blue-deep)}
    .index-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
    .index-strip a{padding:9px 14px;border:1px solid #cbdafa;border-radius:9px;color:#3560bd;background:#fff;font-size:13px}
    .index-strip a:hover{color:var(--blue);background:var(--blue-soft);border-color:#9eb9f6}
    .reading-section{background:#fff}
    .reading-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:65px;align-items:start}
    .reading-aside{padding:26px;background:var(--warm);border:1px solid #f1e7d7;border-radius:var(--radius-md)}
    .reading-aside ul{list-style:none;margin:18px 0 0;padding:0}
    .reading-aside li{padding:12px 0;border-bottom:1px solid #eadfce;color:var(--muted);font-size:14px}
    .reading-aside li:last-child{border-bottom:0}
    .reading-content p{color:var(--muted);font-size:16px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
    .step{padding:22px;background:#f8fbff;border:1px solid #e3ecf9;border-radius:var(--radius-md)}
    .step b{display:block;color:var(--blue);font-size:14px;margin-bottom:12px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    .faq-section{padding-top:74px}
    .faq-list{max-width:850px;margin:0 auto}
    .faq-list details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;box-shadow:0 7px 20px rgba(45,84,150,.05)}
    .faq-list summary{padding:19px 22px;font-weight:700;cursor:pointer;list-style:none}
    .faq-list summary::-webkit-details-marker{display:none}
    .faq-list summary:after{content:"+";float:right;color:var(--blue);font-size:22px;line-height:1}
    .faq-list details[open] summary:after{content:"−"}
    .faq-answer{padding:0 22px 20px;color:var(--muted);font-size:14px}
    .cta{padding:48px 0 92px}
    .cta-box{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:38px 42px;background:var(--blue-soft);border:1px solid #cbdafa;border-radius:var(--radius-lg)}
    .cta-box h2{margin-bottom:8px}
    .cta-box p{color:var(--muted);margin:0}
    .site-footer{padding:56px 0 28px;background:#fff;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:45px}
    .footer-brand{margin-bottom:16px}
    .footer-text{max-width:330px;color:var(--muted);font-size:14px;margin:0}
    .footer-title{font-weight:800;margin-bottom:14px}
    .footer-links{display:grid;gap:8px;color:var(--muted);font-size:14px}
    .footer-links a:hover{color:var(--blue);transform:translateX(2px)}
    .copyright{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:20px;border-top:1px solid var(--line);color:#8894a8;font-size:12px}
    .mobile-tabs{display:none}
    :focus-visible{outline:3px solid rgba(47,107,255,.35);outline-offset:3px}
    @media(max-width:900px){
      .intro-grid,.feature-layout,.reading-grid{grid-template-columns:1fr;gap:30px}
      .feature-side{grid-template-columns:1fr 1fr}
      .topic-row{grid-template-columns:58px 1fr}
      .topic-link{grid-column:2}
      .cta-box{align-items:flex-start;flex-direction:column}
    }
    @media(max-width:640px){
      :root{--section:62px}
      body{font-size:15px;padding-bottom:76px}
      .container{width:min(var(--max),calc(100% - 32px))}
      .site-header{position:relative}
      .nav-wrap{min-height:68px}
      .brand{font-size:15px;gap:8px}
      .brand-mark{width:34px;height:34px;border-radius:10px}
      .desktop-nav{display:none}
      .page-intro{padding:48px 0 38px}
      .intro-copy p{font-size:16px}
      .feature-main{padding:26px;min-height:270px}
      .feature-side,.steps{grid-template-columns:1fr}
      .topic-row{gap:12px;padding:19px}
      .topic-no{font-size:22px}
      .topic-row h3{font-size:18px}
      .topic-row p{font-size:13px}
      .reading-grid{gap:22px}
      .cta{padding-bottom:70px}
      .cta-box{padding:28px 24px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .copyright{display:grid;gap:5px;margin-top:30px}
      .mobile-tabs{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);bottom:0;left:0;right:0;z-index:30;padding:8px 8px calc(8px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 25px rgba(45,84,150,.10)}
      .mobile-tabs a{display:flex;min-height:54px;align-items:center;justify-content:center;flex-direction:column;gap:2px;color:var(--muted);font-size:11px;font-weight:700;border-radius:9px}
      .mobile-tabs a:hover,.mobile-tabs a.active{color:var(--blue);background:var(--blue-soft)}
      .tab-icon{font-size:18px;line-height:1}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important}
    }

/* roulang page: category2 */
:root{
  --blue:#2f6bff;
  --blue-deep:#1e4fd0;
  --blue-soft:#eaf1ff;
  --cyan-soft:#eaf8fb;
  --ink:#17243d;
  --muted:#66738b;
  --line:#dfe7f3;
  --paper:#fff;
  --page:#f7faff;
  --warm:#fffaf3;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow:0 16px 42px rgba(45,84,150,.10);
  --shadow-hover:0 22px 52px rgba(45,84,150,.17);
  --max:1180px;
  --section:88px;
}
*,
*::before,
*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--page);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  padding-bottom:0;
}
h1,h2,h3,h4,p{margin-top:0}
h1,h2,h3,h4{line-height:1.3;letter-spacing:-.025em}
h1{font-size:clamp(34px,5vw,56px);margin-bottom:20px}
h2{font-size:clamp(28px,4vw,40px);margin-bottom:16px}
h3{font-size:21px;margin-bottom:10px}
p{margin-bottom:18px}
a{
  color:inherit;
  text-decoration:none;
  transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
img{display:block;max-width:100%;height:auto}
button,input,select{font:inherit}
button,.button{cursor:pointer}
.container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--blue);
  font-size:13px;
  font-weight:800;
  letter-spacing:.08em;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--blue);border-radius:2px}
.section{padding:var(--section) 0}
.section-head{max-width:700px;margin-bottom:40px}
.section-head p{color:var(--muted);font-size:17px;margin-bottom:0}
.site-header{
  position:sticky;
  top:0;
  z-index:20;
  background:rgba(255,255,255,.95);
  border-bottom:1px solid rgba(223,231,243,.9);
  backdrop-filter:blur(12px);
}
.nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:26px}
.brand{display:inline-flex;align-items:center;gap:12px;font-weight:800;font-size:18px;white-space:nowrap}
.brand-mark{
  width:38px;height:38px;display:grid;place-items:center;color:#fff;
  background:var(--blue);border-radius:12px;
  box-shadow:0 8px 18px rgba(47,107,255,.25);font-size:16px
}
.desktop-nav{display:flex;align-items:center;gap:8px}
.desktop-nav a{
  position:relative;min-height:44px;display:inline-flex;align-items:center;
  padding:0 15px;color:var(--muted);font-size:14px;font-weight:700;border-radius:9px
}
.desktop-nav a:hover{color:var(--blue);background:var(--blue-soft)}
.desktop-nav a.active{color:var(--blue)}
.desktop-nav a.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;
  background:var(--blue);border-radius:2px
}
.nav-action{color:var(--blue)!important;border:1px solid #cddcff;margin-left:6px}
.nav-action:hover{color:#fff!important;background:var(--blue)!important}
.page-intro{
  padding:72px 0 62px;
  background:linear-gradient(180deg,#fff 0%,#f7faff 100%);
  border-bottom:1px solid #e7eef9;
}
.breadcrumb{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin:0 0 25px}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb .current{color:var(--blue);font-weight:700}
.intro-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:70px;align-items:end}
.intro-copy{max-width:780px}
.intro-copy h1{max-width:760px}
.intro-copy h1 span{color:var(--blue)}
.intro-copy p{max-width:700px;color:var(--muted);font-size:18px;margin-bottom:0}
.intro-aside{
  padding:22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-md);box-shadow:var(--shadow)
}
.aside-label{color:var(--muted);font-size:12px;font-weight:800;letter-spacing:.08em}
.aside-number{color:var(--blue);font-size:42px;font-weight:800;line-height:1.1;margin:8px 0}
.aside-text{color:var(--muted);font-size:14px;margin:0}
.tag,.badge{
  display:inline-flex;align-items:center;min-height:28px;padding:0 10px;
  border:1px solid #cbdafa;border-radius:99px;color:#3560bd;
  background:var(--blue-soft);font-size:12px;font-weight:700
}
.badge{color:#25757f;border-color:#c8e8eb;background:var(--cyan-soft)}
.button{
  display:inline-flex;align-items:center;justify-content:center;min-height:48px;
  padding:0 21px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:800;transition:.22s ease
}
.button.primary{color:#fff;background:var(--blue);box-shadow:0 10px 22px rgba(47,107,255,.22)}
.button.primary:hover{color:#fff;background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 15px 28px rgba(47,107,255,.28)}
.button.secondary{color:var(--blue);background:#fff;border-color:#cbd9f4}
.button.secondary:hover{background:var(--blue-soft);border-color:#a9c0f7;transform:translateY(-2px)}
.button:active{transform:translateY(0)}
.button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{
  outline:3px solid rgba(47,107,255,.3);outline-offset:3px
}
.guide-section{padding:82px 0}
.guide-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:52px;align-items:start}
.topic-index{
  position:sticky;top:105px;padding:24px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow)
}
.topic-index h3{font-size:18px;margin-bottom:17px}
.index-link{
  display:flex;align-items:center;gap:10px;padding:12px 0;
  color:var(--muted);font-size:14px;border-bottom:1px solid #edf2f8
}
.index-link:last-child{border-bottom:0}
.index-link:hover{color:var(--blue);padding-left:4px}
.index-link strong{color:#9aaccc;font-size:12px;width:22px}
.index-link.active{color:var(--blue);font-weight:800}
.stream{min-width:0}
.stream-intro{
  display:flex;justify-content:space-between;align-items:end;gap:20px;
  padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:22px
}
.stream-intro h2{margin-bottom:0;font-size:30px}
.stream-intro p{color:var(--muted);font-size:14px;margin:0}
.guide-card{
  display:grid;grid-template-columns:94px minmax(0,1fr);gap:24px;
  padding:26px 0;border-bottom:1px solid var(--line)
}
.guide-card:last-child{border-bottom:0}
.card-no{
  width:76px;height:76px;display:grid;place-items:center;
  color:var(--blue);background:var(--blue-soft);border:1px solid #cfddfa;
  border-radius:18px;font-size:23px;font-weight:800
}
.card-content h3{margin:10px 0 9px;font-size:22px}
.card-content p{color:var(--muted);font-size:15px;margin-bottom:14px}
.card-meta{display:flex;flex-wrap:wrap;align-items:center;gap:9px;color:#8794aa;font-size:12px}
.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--blue);font-size:14px;font-weight:800}
.text-link:hover{gap:11px;color:var(--blue-deep)}
.experience-panel{
  margin-top:35px;padding:28px 30px;background:#203d86;color:#fff;
  border-radius:var(--radius-lg);box-shadow:var(--shadow)
}
.experience-panel h3{color:#fff;font-size:24px}
.experience-panel p{color:#d7e1ff;font-size:15px;max-width:650px}
.experience-points{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:22px}
.experience-point{padding:16px;border:1px solid rgba(255,255,255,.16);border-radius:12px;background:rgba(255,255,255,.07)}
.experience-point strong{display:block;color:#fff;margin-bottom:4px}
.experience-point span{display:block;color:#bdccf1;font-size:13px;line-height:1.5}
.filter-bar{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  padding:18px;margin-bottom:32px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-md);box-shadow:0 8px 24px rgba(45,84,150,.06)
}
.filter-label{color:var(--ink);font-size:14px;font-weight:800;margin-right:4px}
.filter-button{
  min-height:38px;padding:0 14px;border:1px solid #d6e1f2;border-radius:8px;
  color:var(--muted);background:#fff;font-size:13px
}
.filter-button:hover,.filter-button.active{color:var(--blue);border-color:#a9c0f7;background:var(--blue-soft)}
.faq-section{background:#fff;border-top:1px solid #e5edf8}
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:start}
.faq-intro p{color:var(--muted)}
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{
  position:relative;list-style:none;padding:20px 35px 20px 0;
  cursor:pointer;font-size:16px;font-weight:800
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"+";position:absolute;right:3px;top:15px;color:var(--blue);
  font-size:25px;font-weight:400;transition:transform .2s
}
.faq-list details[open] summary::after{content:"−"}
.faq-list details p{color:var(--muted);font-size:14px;padding:0 35px 19px 0;margin:0}
.cta-section{padding:80px 0}
.cta-box{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:42px 48px;background:var(--blue-soft);border:1px solid #cfddfa;
  border-radius:var(--radius-lg)
}
.cta-box h2{font-size:32px;margin-bottom:10px}
.cta-box p{color:var(--muted);margin:0;max-width:650px}
.cta-actions{display:flex;flex-wrap:wrap;gap:11px;flex-shrink:0}
.site-footer{padding:58px 0 27px;background:#fff;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:50px;padding-bottom:42px}
.footer-brand{margin-bottom:15px}
.footer-text{color:var(--muted);font-size:14px;max-width:330px;margin:0}
.footer-title{font-size:14px;font-weight:800;margin-bottom:14px}
.footer-links{display:grid;gap:8px}
.footer-links a{color:var(--muted);font-size:14px}
.footer-links a:hover{color:var(--blue);transform:translateX(3px)}
.copyright{
  display:flex;justify-content:space-between;gap:15px;padding-top:22px;
  border-top:1px solid var(--line);color:#8a96aa;font-size:12px
}
.mobile-tabs{display:none}
@media(max-width:1024px){
  .hero-grid,.intro-layout{gap:36px}
  .guide-layout{grid-template-columns:225px minmax(0,1fr);gap:32px}
}
@media(max-width:767px){
  :root{--section:64px}
  body{padding-bottom:76px}
  .container{width:min(var(--max),calc(100% - 32px))}
  .site-header{position:relative}
  .nav-wrap{min-height:68px}
  .brand{font-size:15px;gap:8px}
  .brand-mark{width:34px;height:34px;border-radius:10px}
  .desktop-nav{display:none}
  .page-intro{padding:47px 0 43px}
  .intro-layout{display:block}
  .intro-copy h1{font-size:36px}
  .intro-copy p{font-size:16px}
  .intro-aside{margin-top:28px}
  .guide-section{padding:58px 0}
  .guide-layout{display:block}
  .topic-index{position:static;margin-bottom:34px}
  .stream-intro{display:block}
  .stream-intro h2{font-size:27px;margin-bottom:7px}
  .guide-card{grid-template-columns:62px minmax(0,1fr);gap:15px;padding:21px 0}
  .card-no{width:56px;height:56px;border-radius:14px;font-size:18px}
  .card-content h3{font-size:18px;margin-top:3px}
  .card-content p{font-size:14px}
  .experience-points{grid-template-columns:1fr}
  .experience-panel{padding:24px 20px}
  .filter-bar{align-items:flex-start}
  .filter-label{width:100%}
  .faq-grid{display:block}
  .faq-intro{margin-bottom:30px}
  .cta-box{display:block;padding:30px 23px}
  .cta-box h2{font-size:27px}
  .cta-actions{margin-top:23px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:30px}
  .copyright{display:block}
  .copyright span{display:block;margin-bottom:5px}
  .mobile-tabs{
    position:fixed;display:grid;grid-template-columns:repeat(4,1fr);
    left:0;right:0;bottom:0;z-index:30;
    min-height:68px;padding:7px 8px calc(7px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.98);border-top:1px solid var(--line);
    box-shadow:0 -8px 24px rgba(45,84,150,.10)
  }
  .mobile-tabs a{
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:2px;color:var(--muted);font-size:11px;font-weight:700;border-radius:9px
  }
  .mobile-tabs a:hover,.mobile-tabs a.active{color:var(--blue);background:var(--blue-soft)}
  .tab-icon{font-size:19px;line-height:1}
}
@media(max-width:520px){
  h1{font-size:32px}
  .button{width:100%}
  .cta-actions{display:grid}
  .filter-button{flex:1}
  .hero-note{gap:7px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
}