/* roulang page: index */
:root {
            --blue: #2167d5;
            --blue-dark: #174da4;
            --blue-soft: #eaf2ff;
            --ink: #17243a;
            --muted: #67758b;
            --line: #dce5f1;
            --paper: #ffffff;
            --wash: #f5f8fc;
            --warm: #f4a261;
            --mint: #dff4ed;
            --radius: 16px;
            --shadow: 0 18px 45px rgba(42, 76, 126, .10);
            --shadow-hover: 0 22px 55px rgba(42, 76, 126, .17);
            --max: 1200px;
        }
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.7;
        }
        a { color: inherit; text-decoration: none; transition: color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease; }
        img, svg { max-width: 100%; display: block; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(33,103,213,.32); outline-offset: 3px; }
        .container { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
        .site-header {
            position: sticky; top: 0; z-index: 20;
            background: rgba(255,255,255,.96);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(12px);
        }
        .nav-wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.04em; white-space: nowrap; }
        .brand-mark {
            width: 34px; height: 34px; border-radius: 10px; background: var(--blue);
            position: relative; box-shadow: 0 7px 16px rgba(33,103,213,.22);
        }
        .brand-mark::before, .brand-mark::after { content: ""; position: absolute; background: #fff; border-radius: 99px; }
        .brand-mark::before { width: 17px; height: 7px; left: 9px; top: 9px; }
        .brand-mark::after { width: 7px; height: 17px; left: 14px; top: 9px; }
        .brand-text { font-size: 16px; }
        .main-nav { display: flex; align-items: center; gap: 4px; }
        .main-nav a { padding: 8px 13px; color: var(--muted); font-size: 14px; border-radius: 9px; }
        .main-nav a:hover, .main-nav a.active { color: var(--blue); background: var(--blue-soft); }
        .nav-action { display: flex; align-items: center; gap: 10px; }
        .nav-search { width: 150px; border: 1px solid var(--line); border-radius: 9px; padding: 8px 11px; color: var(--muted); background: var(--wash); }
        .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 7px 10px; color: var(--line);
            --paper: #ffffff;
            --wash: #f5f8fc;
            --warm: #f4a261;
            --mint: #dff4ed;
            --radius: 16px;
            --shadow: 0 18px 45px rgba(42, 76, 126, .10);
            --shadow-hover: 0 22px 55px rgba(42, 76, 126, .17);
            --max: 1200px;
        }
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            color: var(--ink);
            background: var(--paper);
            font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.7;
        }
        a { color: inherit; text-decoration: none; transition: color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease; }
        img, svg { max-width: 100%; display: block; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(33,103,213,.32); outline-offset: 3px; }
        .container { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
        .site-header {
            position: sticky; top: 0; z-index: 20;
            background: rgba(255,255,255,.96);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(12px);
        }
        .nav-wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.04em; white-space: nowrap; }
        .brand-mark {
            width: 34px; height: 34px; border-radius: 10px; background: var(--blue);
            position: relative; box-shadow: 0 7px 16px rgba(33,103,213,.22);
        }
        .brand-mark::before, .brand-mark::after { content: ""; position: absolute; background: #fff; border-radius: 99px; }
        .brand-mark::before { width: 17px; height: 7px; left: 9px; top: 9px; }
        .brand-mark::after { width: 7px; height: 17px; left: 14px; top: 9px; }
        .brand-text { font-size: 16px; }
        .main-nav { display: flex; align-items: center; gap: 4px; }
        .main-nav a { padding: 8px 13px; color: var(--muted); font-size: 14px; border-radius: 9px; }
        .main-nav a:hover, .main-nav a.active { color: var(--blue); background: var(--blue-soft); }
        .nav-action { display: flex; align-items: center; gap: 10px; }
        .nav-search { width: 150px; border: 1px solid var(--line); border-radius: 9px; padding: 8px 11px; color: var(--muted); background: var(--wash); }
        .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 7px 10px; color: var(--blue); }
        .button {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            min-height: 44px; padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
            font-weight: 700; font-size: 14px; transition: .2s ease;
        }
        .button.primary { color: #fff; background: var(--blue); box-shadow: 0 9px 20px rgba(33,103,213,.20); }
        .button.primary:hover { color: #fff; background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 13px 25px rgba(33,103,213,.25); }
        .button.secondary { color: var(--blue); background: #fff; border-color: #b8ccec; }
        .button.secondary:hover { background: var(--blue-soft); border-color: var(--blue); transform: translateY(-2px); }
        .hero { padding: 72px 0 84px; background: linear-gradient(135deg, #f7faff 0%, #fff 62%); overflow: hidden; }
        .hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 62px; align-items: center; }
        .eyebrow, .section-kicker { color: var(--blue); font-weight: 800; font-size: 13px; letter-spacing: .12em; }
        .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 18px; }
        .eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--warm); }
        h1, h2, h3, p { margin-top: 0; }
        h1 { max-width: 720px; margin-bottom: 22px; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: -.065em; }
        h1 strong { color: var(--blue); font-weight: 850; }
        .hero-copy { max-width: 650px; color: var(--muted); font-size: 17px; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 34px; }
        .hero-points { display: flex; flex-wrap: wrap; gap: 12px 25px; margin: 0; padding: 0; list-style: none; color: var(--ink); font-size: 14px; }
        .hero-points li::before { content: "✓"; display: inline-grid; place-items: center; width: 20px; height: 20px; margin-right: 7px; border-radius: 50%; color: var(--blue); background: var(--blue-soft); font-weight: 800; }
        .visual-stage { min-height: 405px; position: relative; padding: 30px; border: 1px solid #d4e1f5; border-radius: 24px; background: #edf4ff; box-shadow: var(--shadow); }
        .visual-stage::before, .visual-stage::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(33,103,213,.15); }
        .visual-stage::before { width: 360px; height: 360px; right: -120px; top: -120px; }
        .visual-stage::after { width: 260px; height: 260px; left: -110px; bottom: -120px; }
        .visual-grid { height: 100%; position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 14px; }
        .visual-card { padding: 22px; border: 1px solid rgba(255,255,255,.8); border-radius: 15px; background: rgba(255,255,255,.84); box-shadow: 0 10px 25px rgba(74,112,166,.10); }
        .visual-card.tall { grid-row: span 2; display: flex; flex-direction: column; justify-content: space-between; background: var(--blue); color: #fff; }
        .visual-label { color: var(--muted); font-size: 12px; }
        .tall .visual-label { color: #d9e7ff; }
        .visual-number { display: block; margin-top: 8px; font-size: 38px; line-height: 1; font-weight: 850; letter-spacing: -.06em; }
        .shape { width: 118px; height: 118px; margin: 22px auto; border-radius: 50%; border: 19px solid #bcd3f5; box-shadow: inset 0 0 0 8px #e7f0ff, 0 0 0 12px rgba(255,255,255,.16); }
        .measure-line { display: flex; align-items: center; gap: 8px; color: #d9e7ff; font-size: 12px; }
        .measure-line::before { content: ""; width: 52px; height: 1px; background: #9fc2fa; }
        .section { padding: 92px 0; }
        .section.soft { background: var(--wash); }
        .section-head { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 34px; }
        .section-head h2 { max-width: 640px; margin: 8px 0 0; font-size: clamp(30px, 4vw, 43px); line-height: 1.2; letter-spacing: -.05em; }
        .section-head p { max-width: 490px; margin-bottom: 0; color: var(--muted); }
        .feature-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 22px; }
        .feature-intro { padding: 34px; border-radius: var(--radius); background: var(--blue); color: #fff; }
        .feature-intro h3 { margin: 16px 0 12px; font-size: 27px; line-height: 1.25; }
        .feature-intro p { color: #dbe8ff; }
        .number-list { margin: 30px 0 0; padding: 0; list-style: none; }
        .number-list li { display: flex; gap: 12px; padding: 13px 0; border-top: 1px solid rgba(255,255,255,.22); color: #e7efff; font-size: 14px; }
        .number-list b { color: #fff; }
        .feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
        .card { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); transition: .25s ease; }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: #bcd0ef; }
        .feature-card { min-height: 220px; }
        .icon-box { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 20px; border-radius: 12px; color: var(--blue); background: var(--blue-soft); font-weight: 850; }
        .card h3 { margin-bottom: 9px; font-size: 21px; letter-spacing: -.03em; }
        .card p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
        .tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
        .tag { display: inline-flex; padding: 4px 9px; border-radius: 99px; color: #46617f; background: #eef4fb; font-size: 12px; }
        .stock-panel { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; padding: 22px; border: 1px solid #d8e6f7; border-radius: var(--radius); background: #f1f7ff; }
        .stock-item { padding: 7px 12px; border-left: 2px solid #a9c7f5; }
        .stock-item small { display: block; color: var(--muted); font-size: 12px; }
        .stock-item strong { display: block; margin-top: 4px; color: var(--blue-dark); font-size: 21px; }
        .scene-layout { display: grid; grid-template-columns: 1fr 1.05fr; gap: 60px; align-items: center; }
        .scene-art { min-height: 390px; position: relative; overflow: hidden; border-radius: 22px; background: #dfeeff; }
        .scene-art::before { content: ""; position: absolute; width: 310px; height: 310px; left: 12%; top: 10%; border-radius: 50%; background: #b4cef3; box-shadow: 0 0 0 28px rgba(255,255,255,.35), 0 0 0 54px rgba(255,255,255,.18); }
        .scene-art::after { content: ""; position: absolute; width: 76%; height: 8px; left: 12%; bottom: 70px; border-radius: 8px; background: #6d95cc; transform: rotate(-7deg); box-shadow: 0 18px 0 rgba(70,105,157,.16); }
        .scene-list { margin: 24px 0 0; padding: 0; list-style: none; }
        .scene-list li { display: grid; grid-template-columns: 45px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--line); }
        .scene-list span { display: grid; place-items: center; width: 35px; height: 35px; border-radius: 50%; color: var(--blue); background: var(--blue-soft); font-weight: 800; }
        .scene-list h3 { margin: 0 0 3px; font-size: 18px; }
        .scene-list p { margin: 0; color: var(--muted); font-size: 14px; }
        .case-layout { display: grid; grid-template-columns: 1.3fr .7fr; gap: 22px; }
        .case-main { min-height: 330px; padding: 34px; border-radius: var(--radius); color: #fff; background: linear-gradient(145deg, #286fd8, #174da4); }
        .case-main .tag { color: #e2edff; background: rgba(255,255,255,.16); }
        .case-main h3 { max-width: 520px; margin: 28px 0 12px; font-size: 30px; line-height: 1.3; }
        .case-main p { max-width: 580px; color: #dce9ff; }
        .case-side { display: grid; gap: 22px; }
        .case-side .card { display: flex; flex-direction: column; justify-content: center; }
        .case-side h3 { font-size: 18px; }
        .case-side p { font-size: 13px; }
        .price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
        .price-card { position: relative; }
        .price-card.featured { border: 2px solid var(--blue); padding: 27px; }
        .recommend { position: absolute; top: -13px; right: 20px; padding: 4px 10px; border-radius: 99px; color: #fff; background: var(--blue); font-size: 12px; font-weight: 700; }
        .price-card h3 { margin-bottom: 7px; }
        .price-note { color: var(--muted); font-size: 13px; }
        .price-value { margin: 20px 0; color: var(--blue-dark); font-size: 28px; font-weight: 850; }
        .price-card ul { min-height: 128px; margin: 0 0 22px; padding: 0; list-style: none; color: var(--muted); font-size: 14px; }
        .price-card li { padding: 5px 0; }
        .price-card li::before { content: "·"; margin-right: 8px; color: var(--warm); font-size: 20px; vertical-align: middle; }
        .news-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 22px; }
        .news-list { overflow: hidden; padding: 0; }
        .news-item { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 20px 26px; border-bottom: 1px solid var(--line); }
        .news-item:last-child { border-bottom: 0; }
        .news-item h3 { margin: 0 0 5px; font-size: 17px; }
        .news-item p { margin: 0; color: var(--muted); font-size: 13px; }
        .news-date { flex: 0 0 auto; color: var(--muted); font-size: 12px; }
        .recommend-box { padding: 30px; border-radius: var(--radius); background: #fff8ef; border: 1px solid #f4dfc4; }
        .recommend-box h3 { margin-bottom: 10px; font-size: 23px; }
        .recommend-box p { color: #776852; font-size: 14px; }
        .kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
        .kpi { padding: 23px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
        .kpi strong { display: block; color: var(--blue); font-size: 28px; line-height: 1.2; }
        .kpi span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; }
        .faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 55px; }
        .faq-intro h2 { margin: 9px 0 14px; font-size: 36px; line-height: 1.2; }
        .faq-intro p { color: var(--muted); }
        .accordion { margin: 0; border: 0; background: transparent; }
        .accordion-item { margin-bottom: 10px; border: 1px solid var(--line); border-radius: 12px; background: #fff; overflow: hidden; }
        .accordion-title { display: block; padding: 18px 22px; color: var(--ink); font-weight: 700; background: #fff; border: 0; }
        .accordion-title:hover { color: var(--blue); background: var(--blue-soft); }
        .accordion-content { padding: 0 22px 20px; color: var(--muted); font-size: 14px; background: #fff; }
        .accordion-title::before { color: var(--blue); }
        .cta { padding: 64px 0; }
        .cta-box { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 40px 46px; border: 1px solid #c4d9f5; border-radius: 20px; background: #edf5ff; }
        .cta-box h2 { margin: 0 0 8px; font-size: 31px; line-height: 1.25; }
        .cta-box p { margin: 0; color: var(--muted); }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
        .site-footer { padding: 54px 0 24px; border-top: 1px solid var(--line); background: #f8fafc; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 35px; padding-bottom: 38px; }
        .footer-brand p { max-width: 280px; margin: 15px 0 0; color: var(--muted); font-size: 13px; }
        .footer-title { margin: 4px 0 14px; font-size: 14px; font-weight: 800; }
        .footer-links { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 13px; }
        .footer-links a:hover { color: var(--blue); }
        .copyright { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
        .float-bar { position: fixed; right: 22px; bottom: 22px; z-index: 15; display: flex; align-items: center; gap: 13px; padding: 10px 10px 10px 17px; border: 1px solid #c8d9ef; border-radius: 12px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); }
        .float-bar span { color: var(--muted); font-size: 13px; }
        @media (max-width: 1024px) {
            .container { width: min(var(--max), calc(100% - 36px)); }
            .hero-grid, .scene-layout { gap: 35px; }
            .nav-search { display: none; }
        }
        @media (max-width: 768px) {
            .nav-wrap { min-height: 62px; flex-wrap: wrap; }
            .menu-toggle { display: block; }
            .nav-action { margin-left: auto; }
            .main-nav { display: none; width: 100%; order: 3; padding: 8px 0 14px; flex-direction: column; align-items: stretch; border-top: 1px solid var(--line); }
            .main-nav.is-open { display: flex; }
            .main-nav a { padding: 11px 12px; }
            .hero { padding: 52px 0 62px; }
            .hero-grid, .feature-layout, .scene-layout, .case-layout, .news-layout, .faq-layout { grid-template-columns: 1fr; }
            .visual-stage { min-height: 330px; }
            .section { padding: 65px 0; }
            .section-head { display: block; }
            .section-head p { margin-top: 16px; }
            .stock-panel, .price-grid { grid-template-columns: 1fr; }
            .price-card ul { min-height: auto; }
            .kpi-row { grid-template-columns: repeat(2, 1fr); }
            .cta-box { display: block; padding: 30px 25px; }
            .cta-actions { margin-top: 22px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .container { width: min(var(--max), calc(100% - 28px)); }
            .brand-text { font-size: 14px; }
            h1 { font-size: 39px; }
            .hero-actions .button { width: 100%; }
            .visual-stage { padding: 17px; min-height: 280px; }
            .visual-card { padding: 15px; }
            .visual-number { font-size: 27px; }
            .shape { width: 80px; height: 80px; border-width: 13px; }
            .feature-grid { grid-template-columns: 1fr; }
            .feature-intro, .card { padding: 22px; }
            .news-item { display: block; padding: 17px 20px; }
            .news-date { display: block; margin-top: 8px; }
            .kpi-row { gap: 10px; }
            .kpi { padding: 17px; }
            .kpi strong { font-size: 23px; }
            .faq-intro h2 { font-size: 30px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 25px 16px; }
            .copyright { display: block; }
            .copyright span { display: block; margin-top: 7px; }
            .float-bar { right: 12px; bottom: 12px; left: 12px; justify-content: space-between; }
        }

/* roulang page: category2 */
:root{
      --blue:#2167d5;--blue-dark:#174da4;--blue-soft:#eaf2ff;--ink:#17243a;
      --muted:#67758b;--line:#dce5f1;--paper:#fff;--wash:#f5f8fc;
      --warm:#f4a261;--mint:#dff4ed;--radius:16px;
      --shadow:0 18px 45px rgba(42,76,126,.10);
      --shadow-hover:0 22px 55px rgba(42,76,126,.17);--max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei","Noto Sans SC",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:.2s ease}
    img,svg{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .nav-wrap{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--blue);position:relative;box-shadow:0 7px 16px rgba(33,103,213,.22)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:99px}
    .brand-mark:before{width:17px;height:7px;left:9px;top:9px}.brand-mark:after{width:7px;height:17px;left:14px;top:9px}
    .brand-text{font-size:16px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:8px 13px;color:var(--muted);font-size:14px;border-radius:9px}
    .main-nav a:hover,.main-nav a.active{color:var(--blue);background:var(--blue-soft)}
    .nav-action{display:flex;align-items:center;gap:10px}
    .nav-search{width:150px;border:1px solid var(--line);border-radius:9px;padding:8px 11px;color:var(--muted);background:var(--wash);outline:0}
    .nav-search:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(33,103,213,.13)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;padding:7px 10px;color:var(--blue)}
    .button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:10px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.2s ease}
    .button:focus,.filter:focus,.accordion-title:focus{outline:3px solid rgba(33,103,213,.25);outline-offset:2px}
    .button.primary{color:#fff;background:var(--blue);box-shadow:0 9px 20px rgba(33,103,213,.2)}
    .button.primary:hover{color:#fff;background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 13px 25px rgba(33,103,213,.25)}
    .button.secondary{color:var(--blue);background:#fff;border-color:#b8ccec}
    .button.secondary:hover{background:var(--blue-soft);border-color:var(--blue);transform:translateY(-2px)}
    .hero{padding:70px 0 62px;background:linear-gradient(135deg,#f7faff 0%,#fff 62%);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:8px;align-items:center;margin-bottom:28px;color:var(--muted);font-size:13px}
    .breadcrumb a{color:var(--blue)}.breadcrumb span{color:#9aa8b9}
    .hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:58px;align-items:center}
    .eyebrow,.section-kicker{color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.12em}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;margin-bottom:16px}.eyebrow:before{content:"";width:26px;height:2px;background:var(--warm)}
    h1,h2,h3,p{margin-top:0}h1{font-size:clamp(38px,5vw,62px);line-height:1.12;letter-spacing:-.06em;margin-bottom:20px}
    h1 em{font-style:normal;color:var(--blue)}
    .hero-copy{max-width:650px;color:var(--muted);font-size:17px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 0}
    .index-panel{padding:28px;border:1px solid #d4e1f5;border-radius:22px;background:#edf4ff;box-shadow:var(--shadow)}
    .index-panel h3{font-size:20px;margin-bottom:18px}.index-panel p{color:var(--muted);font-size:14px;margin-bottom:22px}
    .index-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .index-list a{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;border:1px solid rgba(33,103,213,.12);border-radius:11px;background:#fff;color:var(--ink);font-weight:700}
    .index-list a span{color:var(--blue);font-size:18px}.index-list a:hover{transform:translateX(4px);border-color:#9ebce9;box-shadow:0 8px 18px rgba(42,76,126,.08)}
    .summary-bar{padding:22px 0;border-bottom:1px solid var(--line);background:#fff}
    .summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
    .summary-item{padding:18px 22px;background:#fff}.summary-item strong{display:block;color:var(--blue);font-size:25px;line-height:1.2}.summary-item span{font-size:13px;color:var(--muted)}
    .section{padding:88px 0}.section.soft{background:var(--wash)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-head h2{max-width:650px;margin:8px 0 0;font-size:clamp(30px,4vw,43px);line-height:1.2;letter-spacing:-.05em}
    .section-head p{max-width:490px;margin-bottom:0;color:var(--muted)}
    .guide-layout{display:grid;grid-template-columns:.78fr 1.22fr;gap:24px}
    .guide-intro{padding:31px;border-radius:var(--radius);background:var(--blue);color:#fff}
    .guide-intro h3{font-size:28px;line-height:1.3;margin:18px 0 12px}.guide-intro p{color:#dbe8ff}
    .guide-tag{display:inline-flex;padding:6px 10px;border-radius:99px;background:rgba(255,255,255,.14);font-size:12px}
    .guide-list{display:grid;gap:12px}.guide-row{display:grid;grid-template-columns:64px 1fr auto;align-items:center;gap:18px;padding:21px 23px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 22px rgba(42,76,126,.05)}
    .guide-row:hover{border-color:#a8c3ec;box-shadow:var(--shadow-hover);transform:translateY(-2px)}
    .row-no{font-size:28px;color:#a5bce0;font-weight:800}.guide-row h3{font-size:19px;margin:0 0 4px}.guide-row p{font-size:14px;color:var(--muted);margin:0}.row-arrow{color:var(--blue);font-size:22px}
    .feature-strip{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
    .feature-card{padding:30px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
    .feature-card.accent{background:#f1f7ff;border-color:#c9dcf7}.feature-card h3{font-size:24px;margin:13px 0 10px}.feature-card p{color:var(--muted);font-size:15px}
    .metric-line{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.metric{padding:8px 12px;border-radius:8px;background:var(--blue-soft);color:var(--blue);font-size:13px;font-weight:700}
    .scene-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.scene-card{padding:25px;border-top:3px solid var(--blue);background:#fff;border-radius:12px;box-shadow:var(--shadow);transition:.2s}
    .scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.scene-card h3{font-size:21px;margin:14px 0 8px}.scene-card p{color:var(--muted);font-size:14px}.scene-card .mini-label{color:var(--warm);font-size:12px;font-weight:800;letter-spacing:.08em}
    .faq-wrap{display:grid;grid-template-columns:.72fr 1.28fr;gap:50px}.faq-wrap h2{font-size:36px;line-height:1.25;letter-spacing:-.04em}.faq-wrap>div>p{color:var(--muted)}
    .accordion{margin:0;padding:0;list-style:none}.accordion-item{border-bottom:1px solid var(--line)}.accordion-title{display:flex;justify-content:space-between;gap:20px;padding:19px 0;font-weight:700;cursor:pointer}.accordion-title:after{content:"+";color:var(--blue);font-size:22px;font-weight:400}.accordion-title[aria-expanded="true"]:after{content:"−"}.accordion-content{display:none;padding:0 30px 18px 0;color:var(--muted);font-size:14px}.accordion-content.is-open{display:block}
    .cta{padding:58px 0}.cta-card{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:36px 40px;border:1px solid #bfd5f3;border-radius:20px;background:#eaf3ff}.cta-card h2{font-size:30px;margin-bottom:8px}.cta-card p{color:var(--muted);margin-bottom:0}.cta-actions{display:flex;gap:10px;flex-shrink:0}
    .site-footer{padding:58px 0 24px;background:#f7f9fc;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}.footer-brand p{max-width:330px;color:var(--muted);font-size:14px;margin:17px 0 0}.footer-title{margin-bottom:13px;font-size:14px;font-weight:800}.footer-links{margin:0;padding:0;list-style:none}.footer-links li{margin:8px 0;color:var(--muted);font-size:14px}.footer-links a:hover{color:var(--blue)}.copyright{display:flex;justify-content:space-between;gap:15px;padding-top:27px;margin-top:38px;border-top:1px solid var(--line);color:#8794a6;font-size:12px}
    @media(max-width:900px){.nav-action{display:none}.hero-grid,.guide-layout,.faq-wrap{grid-template-columns:1fr}.hero{padding-top:52px}.summary-grid{grid-template-columns:repeat(2,1fr)}.scene-list{grid-template-columns:1fr 1fr}.feature-strip{grid-template-columns:1fr}}
    @media(max-width:650px){.container{width:min(100% - 34px,var(--max))}.nav-wrap{min-height:62px}.brand-text{font-size:14px}.menu-toggle{display:block}.main-nav{display:none;position:absolute;left:17px;right:17px;top:70px;padding:10px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.main-nav.open{display:flex}.main-nav a{padding:11px 14px}.hero{padding:42px 0 48px}h1{font-size:39px}.hero-copy{font-size:15px}.index-panel{padding:22px}.summary-grid{grid-template-columns:1fr 1fr}.summary-item{padding:15px}.summary-item strong{font-size:21px}.section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:16px}.guide-row{grid-template-columns:40px 1fr auto;padding:18px 15px;gap:11px}.row-no{font-size:22px}.scene-list{grid-template-columns:1fr}.faq-wrap{gap:20px}.faq-wrap h2{font-size:30px}.cta-card{display:block;padding:28px 23px}.cta-actions{margin-top:22px;flex-wrap:wrap}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:6px}}

/* roulang page: category1 */
:root{
      --blue:#2167d5;--blue-dark:#174da4;--blue-soft:#eaf2ff;--ink:#17243a;
      --muted:#67758b;--line:#dce5f1;--paper:#fff;--wash:#f5f8fc;
      --warm:#f4a261;--mint:#dff4ed;--radius:16px;
      --shadow:0 18px 45px rgba(42,76,126,.10);
      --shadow-hover:0 22px 55px rgba(42,76,126,.17);--max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei","Noto Sans SC",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease,box-shadow .2s ease}
    img,svg{max-width:100%;display:block}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .nav-wrap{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--blue);position:relative;box-shadow:0 7px 16px rgba(33,103,213,.22)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:99px}
    .brand-mark:before{width:17px;height:7px;left:9px;top:9px}.brand-mark:after{width:7px;height:17px;left:14px;top:9px}
    .brand-text{font-size:16px}
    .main-nav{display:flex;align-items:center;gap:4px}
    .main-nav a{padding:8px 13px;color:var(--muted);font-size:14px;border-radius:9px}
    .main-nav a:hover,.main-nav a.active{color:var(--blue);background:var(--blue-soft)}
    .nav-action{display:flex;align-items:center;gap:10px}
    .nav-search{width:150px;border:1px solid var(--line);border-radius:9px;padding:8px 11px;color:var(--muted);background:var(--wash);outline:0}
    .nav-search:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(33,103,213,.14)}
    .button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:10px;border:1px solid transparent;font-weight:700;font-size:14px;transition:.2s ease}
    .button.primary{color:#fff;background:var(--blue);box-shadow:0 9px 20px rgba(33,103,213,.20)}
    .button.primary:hover{color:#fff;background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 13px 25px rgba(33,103,213,.25)}
    .button.secondary{color:var(--blue);background:#fff;border-color:#b8ccec}
    .button.secondary:hover{background:var(--blue-soft);border-color:var(--blue);transform:translateY(-2px)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;padding:7px 10px;color:var(--blue)}
    .sub-hero{padding:58px 0 62px;background:linear-gradient(135deg,#f7faff 0%,#fff 68%)}
    .breadcrumb{margin:0 0 20px;color:var(--muted);font-size:13px;display:flex;gap:9px;list-style:none}
    .breadcrumb a{color:var(--blue)}.breadcrumb span{color:#a8b4c5}
    .hero-inner{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}
    .eyebrow,.section-kicker{color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.12em}
    h1,h2,h3,p{margin-top:0}h1{font-size:clamp(38px,5vw,60px);line-height:1.14;letter-spacing:-.055em;margin-bottom:20px}
    h1 em{font-style:normal;color:var(--blue)}
    .hero-copy{max-width:650px;color:var(--muted);font-size:17px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
    .spec-panel{padding:28px;border:1px solid #d4e1f5;border-radius:22px;background:#edf4ff;box-shadow:var(--shadow)}
    .spec-panel h2{font-size:22px;line-height:1.3;margin-bottom:22px}
    .spec-bars{display:grid;gap:13px}
    .spec-row{padding:15px 16px;background:#fff;border:1px solid rgba(33,103,213,.11);border-radius:12px;display:flex;align-items:center;justify-content:space-between;gap:14px}
    .spec-row strong{font-size:14px}.spec-row span{color:var(--blue);font-size:13px;font-weight:700}
    .bar{height:6px;margin-top:8px;border-radius:99px;background:#e4ecf8;overflow:hidden}.bar i{display:block;height:100%;border-radius:inherit;background:var(--blue)}
    .section{padding:82px 0}.section.soft{background:var(--wash)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
    .section-head h2{max-width:650px;margin:8px 0 0;font-size:clamp(29px,4vw,42px);line-height:1.2;letter-spacing:-.05em}
    .section-head p{max-width:480px;margin-bottom:0;color:var(--muted)}
    .filter-bar{display:flex;gap:9px;flex-wrap:wrap;padding:10px;margin-bottom:26px;border:1px solid var(--line);border-radius:13px;background:#fff}
    .filter-bar button{border:0;border-radius:8px;background:transparent;color:var(--muted);padding:9px 15px;font-size:14px}
    .filter-bar button:hover,.filter-bar button.active{color:var(--blue);background:var(--blue-soft);font-weight:700}
    .material-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
    .material-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow);transition:.25s ease}
    .material-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#b9cdef}
    .material-visual{height:150px;margin:-25px -25px 21px;border-radius:16px 16px 0 0;background:#e8f1ff;position:relative;overflow:hidden}
    .material-visual:before{content:"";position:absolute;width:220px;height:70px;left:16%;top:42px;border-radius:50%;background:#a9c9f8;box-shadow:0 13px 0 #7daaf0,0 -8px 0 #dceaff}
    .material-visual:after{content:"";position:absolute;width:120px;height:120px;right:9%;top:17px;border-radius:50%;border:18px solid rgba(33,103,213,.25)}
    .tag{display:inline-flex;padding:5px 9px;border-radius:7px;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:800}
    .material-card h3{font-size:22px;line-height:1.3;margin:14px 0 9px}.material-card p{color:var(--muted);font-size:14px;margin-bottom:17px}
    .meta-list{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}.meta-list li{padding:5px 9px;border:1px solid var(--line);border-radius:7px;color:var(--muted);font-size:12px}
    .card-link{display:inline-flex;margin-top:20px;color:var(--blue);font-size:14px;font-weight:800}.card-link:hover{gap:6px;color:var(--blue-dark)}
    .info-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:22px;align-items:stretch}
    .info-intro{padding:32px;border-radius:var(--radius);background:var(--blue);color:#fff}.info-intro h3{font-size:27px;line-height:1.3;margin:15px 0}.info-intro p{color:#dbe8ff;font-size:15px}
    .number-list{display:grid;gap:12px}.number-item{display:grid;grid-template-columns:42px 1fr;gap:15px;padding:20px;border:1px solid var(--line);border-radius:13px;background:#fff}
    .number{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-weight:800}.number-item h3{font-size:18px;margin:0 0 5px}.number-item p{color:var(--muted);font-size:14px;margin:0}
    .compare{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.compare-card{padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px}.compare-card strong{display:block;font-size:28px;color:var(--blue);margin:8px 0}.compare-card p{color:var(--muted);font-size:14px;margin:0}
    .faq-wrap{max-width:850px}.accordion{margin:0;padding:0;list-style:none}.accordion-item{border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:10px;overflow:hidden}.accordion-title{display:flex;justify-content:space-between;align-items:center;padding:18px 21px;font-weight:700}.accordion-title:after{content:"＋";color:var(--blue);font-size:20px}.accordion-item[open] .accordion-title:after{content:"－"}.accordion-content{padding:0 21px 19px;color:var(--muted);font-size:14px}
    .cta{padding:42px 0}.cta-box{display:flex;justify-content:space-between;align-items:center;gap:25px;padding:34px 38px;border:1px solid #c8daf5;border-radius:18px;background:#eef5ff}.cta-box h2{font-size:29px;line-height:1.3;margin:0 0 8px}.cta-box p{color:var(--muted);margin:0}
    .site-footer{padding:56px 0 22px;background:#f7f9fc;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}.footer-brand p{max-width:315px;color:var(--muted);font-size:14px;margin-top:16px}.footer-title{font-size:14px;font-weight:800;margin-bottom:13px}.footer-links{padding:0;margin:0;list-style:none}.footer-links li{margin:8px 0;color:var(--muted);font-size:14px}.footer-links a:hover{color:var(--blue)}.copyright{display:flex;justify-content:space-between;gap:20px;margin-top:43px;padding-top:18px;border-top:1px solid var(--line);color:#8a97aa;font-size:12px}
    :focus-visible{outline:3px solid rgba(33,103,213,.35);outline-offset:3px}
    @media(max-width:900px){.nav-action{display:none}.hero-inner,.info-layout{grid-template-columns:1fr}.material-grid{grid-template-columns:1fr}.compare{grid-template-columns:repeat(3,1fr)}}
    @media(max-width:700px){.container{width:min(var(--max),calc(100% - 34px))}.nav-wrap{min-height:62px}.brand-text{font-size:14px}.menu-toggle{display:block}.main-nav{display:none;position:absolute;left:17px;right:17px;top:68px;padding:10px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.main-nav.open{display:flex}.main-nav a{padding:11px 13px}.sub-hero{padding:40px 0 48px}h1{font-size:39px}.section{padding:60px 0}.section-head{display:block}.section-head p{margin-top:15px}.compare{grid-template-columns:1fr}.cta-box{display:block;padding:27px 23px}.cta-box .button{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.copyright{display:block}.copyright span{display:block;margin-top:6px}}
    @media(max-width:520px){.hero-actions .button{width:100%}.spec-panel{padding:20px}.material-visual{height:125px}.footer-grid{grid-template-columns:1fr}.breadcrumb{font-size:12px}}