/* roulang page: index */
:root {
            --blue: #2e6fad;
            --blue-deep: #245984;
            --blue-soft: #e8f2fa;
            --mist: #eef6f8;
            --orange: #e9a56e;
            --teal: #5e9eaa;
            --ink: #1f2c3a;
            --muted: #66788a;
            --line: #dce8f2;
            --page: #f7fafd;
            --white: #ffffff;
            --radius-lg: 22px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow: 0 12px 32px rgba(36, 79, 120, .09);
            --shadow-hover: 0 18px 38px rgba(36, 79, 120, .15);
        }

        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--page);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
        }
        a { color: inherit; text-decoration: none; transition: color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease; }
        img { max-width: 100%; display: block; }
        button, input, select, textarea { font: inherit; }
        :focus-visible { outline: 3px solid rgba(46,111,173,.35); outline-offset: 3px; }
        .container { max-width: 1220px; }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,.95);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(12px);
        }
        .navbar { min-height: 78px; }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            color: var(--ink);
            font-weight: 800;
            letter-spacing: -.02em;
            white-space: nowrap;
        }
        .brand-mark {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--blue);
            position: relative;
            box-shadow: 5px 5px 0 #cfe3f1;
        }
        .brand-mark::after {
            content: "";
            width: 14px;
            height: 18px;
            border: 2px solid #fff;
            border-radius: 3px;
            position: absolute;
            left: 10px;
            top: 8px;
        }
        .brand-text { font-size: 18px; }
        .nav-link {
            color: var(--muted);
            font-weight: 600;
            padding: 10px 14px !important;
            position: relative;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 3px;
            height: 2px;
            background: var(--blue);
            transform: scaleX(0);
            transition: transform .2s ease;
        }
        .nav-link:hover, .nav-link.active { color: var(--blue); }
        .nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
        .btn-main {
            background: var(--blue);
            color: #fff;
            border: 1px solid var(--blue);
            border-radius: 13px;
            padding: 12px 21px;
            font-weight: 700;
            box-shadow: 0 8px 18px rgba(46,111,173,.2);
        }
        .btn-main:hover { background: var(--blue-deep); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 22px rgba(46,111,173,.27); }
        .btn-main:active { transform: translateY(0); }
        .btn-quiet {
            color: var(--blue);
            font-weight: 700;
            padding: 10px 0;
            border-bottom: 1px solid #9fc2dc;
        }
        .btn-quiet:hover { color: var(--blue-deep); border-color: var(--blue-deep); }
        .hero {
            padding: 92px 0 70px;
            overflow: hidden;
            background:
                linear-gradient(rgba(220,232,242,.33) 1px, transparent 1px),
                linear-gradient(90deg, rgba(220,232,242,.33) 1px, transparent 1px),
                var(--white);
            background-size: 42px 42px;
        }
        .hero-copy { padding: 24px 0; }
        .eyebrow, .tag {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            border-radius: 9px;
            color: var(--blue-deep);
            background: var(--blue-soft);
            border: 1px solid #cfe3f1;
            padding: 5px 10px;
            font-size: 13px;
            font-weight: 700;
        }
        .eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--teal); }
        h1, h2, h3 { line-height: 1.25; letter-spacing: -.035em; }
        h1 { font-size: clamp(36px, 4.2vw, 56px); font-weight: 800; margin: 22px 0 20px; max-width: 680px; }
        h2 { font-size: clamp(28px, 3vw, 38px); font-weight: 800; margin: 0 0 16px; }
        h3 { font-size: 21px; font-weight: 750; margin: 0 0 9px; }
        .hero-copy p { color: var(--muted); max-width: 650px; font-size: 18px; margin-bottom: 28px; }
        .hero-actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
        .hero-meta { display: flex; gap: 24px; margin-top: 38px; flex-wrap: wrap; }
        .meta-item { border-left: 2px solid var(--orange); padding-left: 12px; color: var(--muted); font-size: 14px; }
        .meta-item strong { display: block; color: var(--ink); font-size: 21px; line-height: 1.3; }
        .entry-wall {
            background: #f2f8fc;
            border: 1px solid var(--line);
            border-radius: 25px;
            padding: 22px;
            box-shadow: var(--shadow);
            transform: rotate(1deg);
        }
        .entry-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
        .entry-top strong { font-size: 18px; }
        .small-note { font-size: 13px; color: var(--muted); }
        .entry-card {
            background: var(--white);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 20px;
            margin-bottom: 13px;
            position: relative;
            overflow: hidden;
        }
        .entry-card::before {
            content: "";
            position: absolute;
            left: 0; top: 0; bottom: 0;
            width: 5px;
            background: var(--blue);
        }
        .entry-card.accent::before { background: var(--orange); }
        .entry-card h3 { margin-top: 9px; font-size: 20px; }
        .entry-card p { color: var(--muted); font-size: 14px; margin: 0; }
        .index-line { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; margin-top: 16px; }
        .section { padding: 108px 0; }
        .section-soft { background: var(--blue-soft); }
        .section-head { max-width: 680px; margin-bottom: 42px; }
        .section-head p, .intro { color: var(--muted); margin: 0; }
        .play-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: stretch; }
        .step-menu { display: flex; flex-direction: column; gap: 12px; }
        .step-menu a {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }
        .step-menu a:hover, .step-menu a.active { border-color: #9fc2dc; box-shadow: var(--shadow); transform: translateX(4px); }
        .number { color: var(--orange); font-size: 18px; font-weight: 800; min-width: 28px; }
        .step-menu p { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 0; }
        .feature-panel {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--line);
            padding: 34px;
            box-shadow: var(--shadow);
        }
        .feature-panel ul { list-style: none; padding: 0; margin: 24px 0 28px; }
        .feature-panel li { padding: 10px 0 10px 27px; border-bottom: 1px solid #edf3f7; position: relative; color: var(--muted); }
        .feature-panel li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 800; }
        .preview-grid { display: grid; grid-template-columns: 1.25fr .75fr .75fr; gap: 18px; }
        .preview-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md); padding: 25px; box-shadow: var(--shadow); min-height: 190px; }
        .preview-card.large { background: var(--blue); color: #fff; min-height: 230px; }
        .preview-card.large p, .preview-card.large .small-note { color: #dcecf7; }
        .preview-card p { color: var(--muted); margin-top: 15px; font-size: 15px; }
        .preview-mark { font-size: 38px; font-weight: 800; color: var(--orange); line-height: 1; }
        .large .preview-mark { color: #ffd2a9; }
        .progress-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow); }
        .progress-track { height: 10px; border-radius: 10px; background: #e5eef4; overflow: hidden; margin: 22px 0 28px; }
        .progress-bar { background: var(--teal); border-radius: inherit; }
        .progress-list { display: grid; grid-template-columns: repeat(4,1fr); gap: 15px; }
        .progress-item { border-left: 2px solid var(--line); padding-left: 14px; color: var(--muted); font-size: 14px; }
        .progress-item.done { border-color: var(--teal); }
        .progress-item strong { display: block; color: var(--ink); margin-bottom: 4px; }
        .news-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 25px; }
        .news-list, .news-feature { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
        .news-list { padding: 10px 28px; }
        .news-item { display: flex; gap: 18px; justify-content: space-between; align-items: center; padding: 22px 0; border-bottom: 1px solid #edf3f7; }
        .news-item:last-child { border-bottom: 0; }
        .news-item h3 { font-size: 18px; margin: 8px 0 4px; }
        .news-item p { color: var(--muted); margin: 0; font-size: 14px; }
        .news-arrow { color: var(--blue); font-size: 24px; }
        .news-feature { padding: 30px; background: #eaf4f8; }
        .abstract-cover { height: 135px; border-radius: 14px; margin-bottom: 22px; background: linear-gradient(135deg,#d6eaf4 0 34%,#8dbbd2 34% 57%,#f6d4b7 57%); position: relative; overflow: hidden; }
        .abstract-cover::after { content:"内容索引"; position:absolute; bottom:16px; left:18px; background:#fff; padding:7px 12px; border-radius:8px; font-weight:800; color:var(--blue-deep); }
        .timeline { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; }
        .timeline-item { padding: 20px 22px; border-top: 2px solid #bdd7e7; position: relative; }
        .timeline-item::before { content:""; width:13px; height:13px; background:var(--orange); border:3px solid var(--page); border-radius:50%; position:absolute; left:22px; top:-8px; }
        .timeline-item strong { display:block; color:var(--blue); margin-bottom:8px; }
        .timeline-item p { color:var(--muted); font-size:14px; margin:0; }
        .faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 48px; }
        .accordion-item { border: 1px solid var(--line) !important; border-radius: 14px !important; overflow: hidden; margin-bottom: 13px; box-shadow: 0 5px 16px rgba(36,79,120,.04); }
        .accordion-button { color: var(--ink); background:#fff; font-weight:700; padding:20px 22px; box-shadow:none !important; }
        .accordion-button:not(.collapsed) { color:var(--blue-deep); background:var(--blue-soft); }
        .accordion-body { color:var(--muted); background:#fafdff; padding:0 22px 21px; }
        .contact { background: var(--blue-soft); border: 1px solid #cfe3f1; border-radius: 25px; padding: 52px; }
        .contact-copy p { color:var(--muted); max-width:470px; }
        .contact-points { list-style:none; padding:0; margin:24px 0 0; color:var(--muted); }
        .contact-points li { margin:10px 0; }
        .contact-points span { color:var(--teal); font-weight:800; margin-right:8px; }
        .form-control, .form-select { border:1px solid var(--line); border-radius:12px; min-height:48px; padding:11px 14px; background:#fff; }
        .form-control:focus, .form-select:focus { border-color:var(--blue); box-shadow:0 0 0 4px rgba(46,111,173,.12); }
        textarea.form-control { min-height:116px; resize:vertical; }
        .form-check-input:checked { background-color:var(--blue); border-color:var(--blue); }
        .form-note { color:var(--muted); font-size:13px; margin-top:13px; }
        .site-footer { background:#fff; border-top:1px solid var(--line); padding:54px 0 22px; }
        .footer-grid { display:grid; grid-template-columns:1.2fr .8fr .8fr; gap:36px; }
        .footer-brand p { color:var(--muted); max-width:300px; font-size:14px; }
        .footer-title { font-weight:800; margin-bottom:13px; }
        .footer-links { list-style:none; padding:0; margin:0; }
        .footer-links li { margin:7px 0; color:var(--muted); font-size:14px; }
        .footer-links a:hover { color:var(--blue); }
        .copyright { border-top:1px solid #edf3f7; margin-top:38px; padding-top:18px; color:#8493a0; font-size:13px; display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap; }
        .mobile-cta { display:none; }
        @media (max-width: 991px) {
            .hero { padding-top:65px; }
            .play-grid, .news-layout, .faq-layout { grid-template-columns:1fr; }
            .preview-grid { grid-template-columns:1fr 1fr; }
            .preview-card.large { grid-column:span 2; }
            .timeline { grid-template-columns:repeat(2,1fr); row-gap:25px; }
            .timeline-item { border-top:0; border-left:2px solid #bdd7e7; }
            .timeline-item::before { left:-8px; top:20px; }
        }
        @media (max-width: 767px) {
            body { font-size:16px; }
            .navbar { min-height:68px; }
            .desktop-cta { display:none; }
            .mobile-cta { display:block; margin-top:24px; }
            .hero { padding:52px 0 50px; }
            h1 { font-size:36px; }
            .hero-copy p { font-size:16px; }
            .entry-wall { margin-top:26px; transform:none; }
            .section { padding:70px 0; }
            .preview-grid, .progress-list, .timeline { grid-template-columns:1fr; }
            .preview-card.large { grid-column:auto; }
            .progress-item { border-left:0; border-top:1px solid var(--line); padding:14px 0 0; }
            .news-list { padding:8px 20px; }
            .news-item { align-items:flex-start; }
            .contact { padding:30px 22px; }
            .footer-grid { grid-template-columns:1fr 1fr; }
            .footer-brand { grid-column:span 2; }
        }
        @media (max-width: 520px) {
            .brand-text { font-size:16px; }
            .hero-actions { gap:16px; }
            .footer-grid { grid-template-columns:1fr; }
            .footer-brand { grid-column:auto; }
            .contact { border-radius:18px; }
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { scroll-behavior:auto !important; transition:none !important; animation:none !important; }
        }

/* roulang page: category1 */
:root{
      --blue:#2e6fad;
      --blue-deep:#245984;
      --blue-soft:#e8f2fa;
      --mist:#eef6f8;
      --orange:#e9a56e;
      --teal:#5e9eaa;
      --ink:#1f2c3a;
      --muted:#66788a;
      --line:#dce8f2;
      --page:#f7fafd;
      --white:#fff;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --shadow:0 12px 32px rgba(36,79,120,.09);
      --shadow-hover:0 18px 38px rgba(36,79,120,.15);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      font-size:16px;
      line-height:1.8;
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    :focus-visible{outline:3px solid rgba(46,111,173,.35);outline-offset:3px}
    .container{max-width:1220px}
    .site-header{
      position:sticky;top:0;z-index:1000;
      background:rgba(255,255,255,.96);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .navbar{min-height:78px}
    .brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.02em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--blue);position:relative;box-shadow:5px 5px 0 #cfe3f1}
    .brand-mark:after{content:"";width:14px;height:18px;border:2px solid #fff;border-radius:3px;position:absolute;left:10px;top:8px}
    .brand-text{font-size:18px}
    .nav-link{color:var(--muted);font-weight:600;padding:10px 14px!important;position:relative}
    .nav-link:after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--blue);transform:scaleX(0);transition:transform .2s ease}
    .nav-link:hover,.nav-link.active{color:var(--blue)}
    .nav-link:hover:after,.nav-link.active:after{transform:scaleX(1)}
    .btn-main{
      display:inline-flex;align-items:center;justify-content:center;
      background:var(--blue);color:#fff;border:1px solid var(--blue);
      border-radius:13px;padding:12px 21px;font-weight:700;
      box-shadow:0 8px 18px rgba(46,111,173,.2);
      min-height:46px;
    }
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(46,111,173,.27)}
    .btn-main:active{transform:translateY(0)}
    .btn-quiet{color:var(--blue);font-weight:700;padding:10px 0;border-bottom:1px solid #9fc2dc}
    .btn-quiet:hover{color:var(--blue-deep);border-color:var(--blue-deep)}
    .category-hero{
      padding:68px 0 62px;
      background:
        linear-gradient(rgba(220,232,242,.36) 1px,transparent 1px),
        linear-gradient(90deg,rgba(220,232,242,.36) 1px,transparent 1px),
        var(--white);
      background-size:42px 42px;
      border-bottom:1px solid var(--line);
    }
    .breadcrumb{margin:0 0 20px;color:var(--muted);font-size:14px}
    .breadcrumb-item+.breadcrumb-item:before{color:#9db5c8}
    .breadcrumb a:hover{color:var(--blue)}
    .eyebrow,.tag{
      display:inline-flex;align-items:center;gap:7px;border-radius:9px;
      color:var(--blue-deep);background:var(--blue-soft);
      border:1px solid #cfe3f1;padding:5px 10px;font-size:13px;font-weight:700
    }
    .eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--teal)}
    h1,h2,h3{font-weight:750;letter-spacing:-.035em;line-height:1.3}
    h1{font-size:clamp(34px,4vw,50px);margin:0 0 18px;max-width:780px}
    h2{font-size:34px;margin:0 0 14px}
    h3{font-size:21px}
    .hero-summary{max-width:760px;color:var(--muted);font-size:18px;margin:0}
    .hero-note{display:flex;gap:12px;flex-wrap:wrap;margin-top:27px}
    .note-pill{border:1px solid var(--line);background:#fff;border-radius:12px;padding:9px 14px;color:var(--muted);font-size:14px}
    .note-pill strong{color:var(--ink);margin-right:5px}
    .section{padding:92px 0}
    .section-soft{background:var(--blue-soft)}
    .section-head{max-width:680px;margin-bottom:34px}
    .section-head p,.intro{color:var(--muted);margin:0}
    .browse-layout{display:grid;grid-template-columns:270px 1fr;gap:34px;align-items:start}
    .side-panel{
      position:sticky;top:104px;background:#fff;border:1px solid var(--line);
      border-radius:var(--radius-md);padding:23px;box-shadow:var(--shadow)
    }
    .side-title{font-size:14px;font-weight:800;color:var(--ink);margin-bottom:12px}
    .side-list{list-style:none;padding:0;margin:0 0 25px}
    .side-list li{border-bottom:1px solid #edf3f7}
    .side-list a{display:flex;justify-content:space-between;padding:11px 0;color:var(--muted);font-size:15px}
    .side-list a:hover,.side-list a.active{color:var(--blue);font-weight:700}
    .side-list a span{color:#9bb3c5}
    .tag-cloud{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:23px}
    .tag-cloud a{font-size:13px;color:var(--blue-deep);background:var(--blue-soft);border-radius:9px;padding:5px 9px}
    .tag-cloud a:hover{background:#d5e9f5}
    .support-box{padding-top:19px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
    .support-box p{margin:5px 0 13px}
    .index-bar{
      display:flex;align-items:center;gap:12px;flex-wrap:wrap;
      padding:14px 17px;background:#fff;border:1px solid var(--line);
      border-radius:var(--radius-md);margin-bottom:18px
    }
    .index-label{font-weight:700;font-size:14px;color:var(--ink)}
    .index-bar a{width:34px;height:34px;display:grid;place-items:center;border-radius:9px;color:var(--muted);background:#f5f9fc}
    .index-bar a:hover,.index-bar a.active{background:var(--blue);color:#fff}
    .guide-list{display:flex;flex-direction:column;gap:17px}
    .guide-card{
      display:grid;grid-template-columns:150px 1fr 38px;gap:22px;align-items:center;
      background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
      padding:16px;box-shadow:0 7px 20px rgba(36,79,120,.05)
    }
    .guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#a9c8df}
    .guide-visual{
      aspect-ratio:4/3;border-radius:12px;overflow:hidden;position:relative;
      background:
        linear-gradient(135deg,rgba(46,111,173,.16),rgba(94,158,170,.08)),
        repeating-linear-gradient(0deg,transparent 0 17px,rgba(46,111,173,.12) 18px),
        #edf6fb;
      display:flex;align-items:flex-end;padding:13px;color:var(--blue-deep);font-size:28px;font-weight:800
    }
    .guide-visual:after{content:"";position:absolute;right:-12px;top:16px;width:55px;height:55px;border:1px solid rgba(46,111,173,.25);transform:rotate(18deg);border-radius:12px}
    .guide-content h3{margin:8px 0 5px}
    .guide-card:hover h3{color:var(--blue)}
    .guide-content p{color:var(--muted);font-size:15px;line-height:1.7;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .card-meta{display:flex;gap:10px;flex-wrap:wrap;color:#8295a5;font-size:13px}
    .arrow{width:34px;height:34px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;color:var(--blue);font-size:20px}
    .guide-card:hover .arrow{background:var(--blue);color:#fff}
    .pagination{gap:8px;margin-top:28px}
    .page-link{border:1px solid var(--line);border-radius:10px!important;color:var(--muted);background:#fff;min-width:40px;text-align:center}
    .page-link:hover{color:var(--blue);background:var(--blue-soft);border-color:#a9c8df}
    .page-item.active .page-link{background:var(--blue);border-color:var(--blue);color:#fff}
    .faq-section{padding:88px 0}
    .faq-intro{padding-right:35px}
    .faq-intro p{color:var(--muted)}
    .accordion{display:flex;flex-direction:column;gap:12px}
    .accordion-item{border:1px solid var(--line)!important;border-radius:var(--radius-md)!important;overflow:hidden;background:#fff;box-shadow:0 6px 18px rgba(36,79,120,.04)}
    .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px 21px;box-shadow:none!important}
    .accordion-button:not(.collapsed){background:var(--blue-soft);color:var(--blue-deep)}
    .accordion-button:focus{box-shadow:inset 0 0 0 2px rgba(46,111,173,.2)!important}
    .accordion-body{color:var(--muted);padding:0 21px 19px;background:var(--blue-soft);font-size:15px}
    .cta-panel{padding:42px;background:var(--white);border:1px solid #cfe3f1;border-radius:var(--radius-lg);box-shadow:var(--shadow);display:flex;justify-content:space-between;gap:28px;align-items:center}
    .cta-panel h2{font-size:28px;margin-bottom:8px}
    .cta-panel p{color:var(--muted);margin:0;max-width:690px}
    .site-footer{background:#f1f6fa;border-top:1px solid var(--line);padding:55px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:42px}
    .footer-brand p{max-width:380px;color:var(--muted);font-size:14px}
    .footer-title{font-weight:800;margin-bottom:13px}
    .footer-links{list-style:none;padding:0;margin:0}
    .footer-links li{margin:7px 0;color:var(--muted);font-size:14px}
    .footer-links a:hover{color:var(--blue)}
    .copyright{border-top:1px solid var(--line);margin-top:37px;padding-top:17px;display:flex;justify-content:space-between;gap:15px;color:#8193a2;font-size:13px}
    @media(max-width:991px){
      .desktop-cta{display:none}
      .browse-layout{grid-template-columns:225px 1fr;gap:22px}
      .guide-card{grid-template-columns:125px 1fr 34px;gap:16px}
    }
    @media(max-width:767px){
      .navbar{min-height:68px}
      .brand-text{font-size:16px}
      .navbar-toggler{padding:8px}
      .navbar-toggler-icon{background-image:linear-gradient(var(--blue),var(--blue)),linear-gradient(var(--blue),var(--blue)),linear-gradient(var(--blue),var(--blue));background-size:24px 2px;background-position:center 4px,center 11px,center 18px;background-repeat:no-repeat}
      .category-hero{padding:46px 0 42px}
      .hero-summary{font-size:16px}
      .section{padding:66px 0}
      h2{font-size:28px}
      .browse-layout{display:block}
      .side-panel{position:static;margin-bottom:22px}
      .side-list{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
      .guide-card{grid-template-columns:105px 1fr;gap:14px;padding:13px}
      .arrow{display:none}
      .guide-content h3{font-size:18px}
      .guide-content p{font-size:14px}
      .cta-panel{display:block;padding:28px 23px}
      .cta-panel .btn-main{margin-top:20px}
      .faq-intro{padding:0;margin-bottom:27px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-brand{grid-column:1/-1}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:5px}
    }
    @media(max-width:520px){
      .hero-note{display:block}
      .note-pill{margin-bottom:8px}
      .side-list{grid-template-columns:1fr}
      .guide-card{grid-template-columns:1fr}
      .guide-visual{aspect-ratio:16/7}
      .footer-grid{grid-template-columns:1fr}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important}
    }

/* roulang page: category2 */
:root{
      --blue:#2e6fad;--blue-deep:#245984;--blue-soft:#e8f2fa;--mist:#eef6f8;
      --orange:#e9a56e;--teal:#5e9eaa;--ink:#1f2c3a;--muted:#66788a;
      --line:#dce8f2;--page:#f7fafd;--white:#fff;--radius-lg:22px;
      --radius-md:16px;--radius-sm:12px;--shadow:0 12px 32px rgba(36,79,120,.09);
      --shadow-hover:0 18px 38px rgba(36,79,120,.15)
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--page);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    .container{max-width:1220px}
    .site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .navbar{min-height:78px}
    .brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-weight:800;letter-spacing:-.02em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--blue);position:relative;box-shadow:5px 5px 0 #cfe3f1}
    .brand-mark::after{content:"";width:14px;height:18px;border:2px solid #fff;border-radius:3px;position:absolute;left:10px;top:8px}
    .brand-text{font-size:18px}
    .nav-link{color:var(--muted);font-weight:600;padding:10px 14px!important;position:relative}
    .nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--blue);transform:scaleX(0);transition:transform .2s ease}
    .nav-link:hover,.nav-link.active{color:var(--blue)}
    .nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
    .btn-main{background:var(--blue);color:#fff;border:1px solid var(--blue);border-radius:13px;padding:12px 21px;font-weight:700;box-shadow:0 8px 18px rgba(46,111,173,.2)}
    .btn-main:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(46,111,173,.27)}
    .btn-main:active{transform:translateY(0)}
    .btn-quiet{color:var(--blue);font-weight:700;padding:10px 0;border-bottom:1px solid #9fc2dc}
    .btn-quiet:hover{color:var(--blue-deep);border-color:var(--blue-deep)}
    .category-hero{padding:58px 0 54px;background:linear-gradient(135deg,#fff 0%,#f0f7fb 100%);border-bottom:1px solid var(--line)}
    .eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;border-radius:9px;color:var(--blue-deep);background:var(--blue-soft);border:1px solid #cfe3f1;padding:5px 10px;font-size:13px;font-weight:700}
    .eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--teal)}
    h1,h2,h3{font-weight:750;letter-spacing:-.035em;line-height:1.25}
    h1{font-size:46px;margin:18px 0 16px}
    h2{font-size:32px}
    h3{font-size:21px}
    .category-hero p{color:var(--muted);max-width:760px;font-size:17px;margin:0}
    .hero-note{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .mini-note{padding:8px 13px;background:#fff;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:14px}
    .section{padding:92px 0}
    .section-head{max-width:700px;margin-bottom:36px}
    .section-head p,.intro{color:var(--muted);margin:0}
    .index-layout{display:grid;grid-template-columns:270px 1fr;gap:30px;align-items:start}
    .side-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:23px;box-shadow:var(--shadow);position:sticky;top:104px}
    .side-title{font-weight:750;margin-bottom:16px}
    .side-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
    .side-list li{border-bottom:1px solid var(--line)}
    .side-list a{display:flex;justify-content:space-between;align-items:center;padding:12px 0;color:var(--muted);font-weight:600}
    .side-list a:hover,.side-list a.active{color:var(--blue)}
    .side-list a span{font-size:13px;color:var(--teal)}
    .side-help{margin-top:24px;padding:16px;background:var(--blue-soft);border-radius:12px;color:var(--muted);font-size:14px}
    .side-help strong{display:block;color:var(--ink);margin-bottom:4px}
    .filter-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:22px}
    .filter-label{font-size:14px;color:var(--muted);font-weight:700;margin-right:4px}
    .filter-chip{display:inline-flex;align-items:center;min-height:40px;padding:7px 14px;border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--muted);font-size:14px;font-weight:650}
    .filter-chip:hover,.filter-chip.active{background:var(--blue-soft);border-color:#a9cbe1;color:var(--blue-deep)}
    .mosaic{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#b5d1e3}
    .content-card.featured{grid-column:span 2;display:grid;grid-template-columns:42% 1fr}
    .visual{min-height:180px;background:linear-gradient(135deg,#dcecf6,#f8fbfd);position:relative;overflow:hidden;padding:20px}
    .featured .visual{min-height:270px}
    .visual::before{content:"";position:absolute;width:170px;height:170px;border:1px solid rgba(46,111,173,.18);border-radius:50%;right:-45px;top:-48px}
    .visual::after{content:"";position:absolute;left:20px;right:20px;bottom:28px;height:1px;background:rgba(46,111,173,.25);box-shadow:0 -18px 0 rgba(46,111,173,.12),0 -36px 0 rgba(46,111,173,.08)}
    .visual-number{position:relative;z-index:1;font-size:52px;line-height:1;color:rgba(46,111,173,.5);font-weight:800}
    .visual-label{position:absolute;z-index:1;bottom:18px;left:20px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:5px 10px;font-size:13px;color:var(--blue-deep);font-weight:700}
    .card-body{padding:23px}
    .card-body .tag{font-size:12px;padding:4px 8px;margin-bottom:12px}
    .card-body h3{margin:0 0 9px}
    .card-body p{color:var(--muted);font-size:14px;line-height:1.75;margin:0 0 17px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .card-meta{display:flex;gap:14px;color:#8293a2;font-size:13px;flex-wrap:wrap}
    .card-link{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:700;font-size:14px}
    .card-link:hover{color:var(--blue-deep);gap:12px}
    .pagination-wrap{display:flex;justify-content:space-between;align-items:center;margin-top:30px;gap:20px}
    .pagination{margin:0;gap:8px}
    .page-link{border:1px solid var(--line);border-radius:9px!important;color:var(--muted);background:#fff;padding:8px 13px}
    .page-link:hover{background:var(--blue-soft);color:var(--blue)}
    .page-item.active .page-link{background:var(--blue);border-color:var(--blue);color:#fff}
    .page-hint{color:var(--muted);font-size:14px}
    .faq-area{background:var(--blue-soft)}
    .faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:start}
    .faq-intro p{color:var(--muted)}
    .accordion{--bs-accordion-border-color:var(--line);--bs-accordion-border-width:1px;--bs-accordion-btn-focus-box-shadow:0 0 0 3px rgba(46,111,173,.16)}
    .accordion-item{border:1px solid var(--line)!important;border-radius:14px!important;overflow:hidden;margin-bottom:14px;background:#fff;box-shadow:0 5px 18px rgba(36,79,120,.05)}
    .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px 21px}
    .accordion-button:not(.collapsed){color:var(--blue-deep);background:#f4f9fc;box-shadow:inset 0 -1px 0 var(--line)}
    .accordion-button::after{background-size:14px}
    .accordion-body{color:var(--muted);font-size:15px;padding:0 21px 20px}
    .contact-section{padding:78px 0}
    .contact-box{background:#fff;border:1px solid #cfe3f1;border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:42px}
    .contact-box p{color:var(--muted)}
    .contact-points{list-style:none;padding:0;margin:25px 0 0}
    .contact-points li{padding:9px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
    .contact-points li::before{content:"✓";color:var(--teal);font-weight:800;margin-right:9px}
    .form-control,.form-select{border:1px solid var(--line);border-radius:11px;padding:12px 14px;color:var(--ink);background:#fbfdff}
    .form-control:focus,.form-select:focus{border-color:#8fb9d5;box-shadow:0 0 0 4px rgba(46,111,173,.12);background:#fff}
    .form-label{font-size:14px;font-weight:700;margin-bottom:7px}
    .form-check-label{color:var(--muted);font-size:13px}
    .site-footer{background:#f1f6f9;border-top:1px solid var(--line);padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:40px}
    .footer-brand p{color:var(--muted);font-size:14px;max-width:310px}
    .footer-title{font-weight:750;margin-bottom:15px}
    .footer-links{list-style:none;padding:0;margin:0}
    .footer-links li{margin:7px 0}
    .footer-links a{color:var(--muted);font-size:14px}
    .footer-links a:hover{color:var(--blue)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:38px;padding-top:18px;color:#7b8b99;font-size:12px}
    .focus-ring:focus-visible,.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(46,111,173,.35);outline-offset:3px}
    @media (max-width:991px){
      .desktop-cta{display:none}.index-layout,.faq-grid{grid-template-columns:1fr}.side-panel{position:static}
      .mosaic{grid-template-columns:1fr}.content-card.featured{grid-column:auto;display:block}.featured .visual{min-height:220px}
    }
    @media (max-width:767px){
      .navbar{min-height:68px}.brand-text{font-size:16px}.category-hero{padding:42px 0 38px}
      h1{font-size:34px}.section{padding:68px 0}.contact-box{padding:26px 20px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-brand{grid-column:span 2}.pagination-wrap{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:520px){
      .hero-note{display:block}.mini-note{margin-bottom:8px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}
      .copyright{display:block}.copyright span{display:block;margin-top:5px}.card-body{padding:20px}
    }
    @media (prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}