/* roulang page: index */
:root {
      --ink: #07111f;
      --ocean: #0b1728;
      --panel: #10233a;
      --panel-light: #142c46;
      --cyan: #54d9ff;
      --blue: #638cff;
      --violet: #9c8cff;
      --text: #eaf5ff;
      --muted: #9bb0c5;
      --subtle: #7189a0;
      --line: rgba(140, 207, 255, .16);
      --line-strong: rgba(84, 217, 255, .4);
      --radius: 22px;
      --shadow: 0 24px 70px rgba(0, 0, 0, .28);
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(36, 121, 189, .18), transparent 28rem),
        radial-gradient(circle at 92% 28%, rgba(95, 76, 194, .13), transparent 26rem),
        var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select { font: inherit; }
    button { cursor: pointer; }
    img { max-width: 100%; display: block; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .section { padding: 92px 0; position: relative; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 9px;
      color: var(--cyan); font-size: 12px; font-weight: 700;
      letter-spacing: .14em; text-transform: uppercase;
    }
    .eyebrow::before {
      content: ""; width: 28px; height: 1px; background: var(--cyan);
      box-shadow: 0 0 12px var(--cyan);
    }
    .section-title { margin: 14px 0 12px; font-size: clamp(30px, 4vw, 46px); line-height: 1.18; letter-spacing: -.045em; font-weight: 800; }
    .section-lead { max-width: 670px; color: var(--muted); font-size: 16px; }
    .glass {
      background: linear-gradient(145deg, rgba(18, 48, 76, .78), rgba(8, 22, 38, .72));
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.035);
      backdrop-filter: blur(16px);
    }
    .glass:hover { border-color: var(--line-strong); }
    .site-header {
      position: sticky; top: 0; z-index: 50;
      background: rgba(7, 17, 31, .78);
      border-bottom: 1px solid rgba(120, 208, 255, .12);
      backdrop-filter: blur(18px);
    }
    .nav-shell { min-height: 76px; display: flex; align-items: center; gap: 28px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .brand-mark {
      width: 30px; height: 30px; border: 1px solid var(--cyan);
      border-radius: 10px; position: relative; transform: rotate(45deg);
      box-shadow: 0 0 18px rgba(84,217,255,.28);
    }
    .brand-mark::before, .brand-mark::after {
      content: ""; position: absolute; border-radius: 50%; background: var(--cyan);
    }
    .brand-mark::before { width: 6px; height: 6px; left: 6px; top: 6px; }
    .brand-mark::after { width: 6px; height: 6px; right: 6px; bottom: 6px; background: var(--violet); }
    .brand-name { font-size: 15px; font-weight: 800; letter-spacing: -.04em; white-space: nowrap; }
    .nav-links { display: flex; align-items: center; gap: 4px; margin-right: auto; }
    .nav-link {
      position: relative; color: var(--muted); padding: 10px 13px;
      border-radius: 10px; font-size: 14px; transition: .25s ease;
    }
    .nav-link:hover, .nav-link.active { color: var(--text); background: rgba(84,217,255,.07); }
    .nav-link.active::after {
      content: ""; position: absolute; bottom: 2px; left: 14px; right: 14px;
      height: 2px; background: var(--cyan); box-shadow: 0 0 12px var(--cyan);
    }
    .nav-search {
      width: 190px; height: 40px; display: flex; align-items: center; gap: 8px;
      padding: 0 12px; border: 1px solid var(--line); border-radius: 12px;
      background: rgba(7,17,31,.55); color: var(--muted);
    }
    .nav-search input { width: 100%; border: 0; outline: 0; color: var(--text); background: transparent; font-size: 13px; }
    .nav-search:focus-within { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(84,217,255,.1); }
    .btn {
      min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      padding: 0 18px; border-radius: 12px; font-size: 14px; font-weight: 700;
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background .22s ease;
    }
    .btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
      outline: 3px solid rgba(84,217,255,.7); outline-offset: 3px;
    }
    .btn-primary {
      color: #03111c; background: linear-gradient(110deg, #58e0ff, #7a9cff);
      box-shadow: 0 0 22px rgba(84,217,255,.22);
    }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 34px rgba(84,217,255,.42); }
    .btn-primary:active, .btn-ghost:active { transform: scale(.98); }
    .btn-ghost { color: var(--text); border: 1px solid var(--line-strong); background: rgba(84,217,255,.035); }
    .btn-ghost:hover { transform: translateY(-2px); border-color: var(--cyan); background: rgba(84,217,255,.1); }
    .menu-btn { display: none; color: var(--text); border: 1px solid var(--line); background: transparent; width: 44px; height: 44px; border-radius: 11px; }
    .mobile-nav { display: none; padding: 10px 0 18px; border-top: 1px solid var(--line); }
    .mobile-nav a { display: block; padding: 12px 4px; color: var(--muted); }

    .hero {
      min-height: 690px; padding: 112px 0 90px; overflow: hidden;
      background-image: linear-gradient(rgba(84,217,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(84,217,255,.04) 1px, transparent 1px);
      background-size: 54px 54px;
    }
    .hero::before {
      content: ""; position: absolute; width: 560px; height: 560px; right: -150px; top: 50px;
      border: 1px solid rgba(84,217,255,.1); border-radius: 50%;
      box-shadow: 0 0 0 55px rgba(84,217,255,.025), 0 0 0 110px rgba(84,217,255,.018);
    }
    .hero-grid { display: grid; grid-template-columns: 7fr 5fr; gap: 70px; align-items: center; position: relative; z-index: 1; }
    .hero h1 { margin: 18px 0 24px; max-width: 700px; font-size: clamp(42px, 6vw, 72px); line-height: 1.1; letter-spacing: -.065em; font-weight: 800; }
    .hero h1 em { color: var(--cyan); font-style: normal; text-shadow: 0 0 26px rgba(84,217,255,.3); }
    .hero-copy { max-width: 650px; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
    .hero-points { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 38px; color: var(--subtle); font-size: 13px; }
    .hero-points strong { display: block; color: var(--text); font-size: 24px; line-height: 1.2; }
    .index-panel { padding: 22px; position: relative; overflow: hidden; }
    .index-panel::after { content: ""; position: absolute; width: 220px; height: 220px; right: -90px; bottom: -120px; border-radius: 50%; background: rgba(84,217,255,.16); filter: blur(30px); }
    .panel-top { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 12px; margin-bottom: 22px; }
    .status { display: inline-flex; align-items: center; gap: 7px; color: #9cf5db; }
    .status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #5de5b7; box-shadow: 0 0 12px #5de5b7; }
    .node-map { min-height: 330px; position: relative; padding: 10px; }
    .node-line { position: absolute; left: 24%; top: 28%; width: 55%; height: 40%; border-top: 1px solid rgba(84,217,255,.55); border-right: 1px solid rgba(84,217,255,.55); transform: rotate(12deg) skew(-13deg); opacity: .65; }
    .node-line::after { content: ""; position: absolute; width: 70%; left: -18%; bottom: -1px; border-top: 1px dashed rgba(156,140,255,.65); transform: rotate(-24deg); }
    .node { position: absolute; display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
    .node i { width: 12px; height: 12px; border: 2px solid var(--cyan); background: var(--ocean); border-radius: 50%; box-shadow: 0 0 16px rgba(84,217,255,.8); }
    .node.one { left: 4%; top: 22%; } .node.two { right: 4%; top: 12%; } .node.three { left: 25%; bottom: 18%; } .node.four { right: 12%; bottom: 25%; }
    .preview-stack { position: absolute; left: 12%; top: 38%; width: 76%; padding: 16px; border-radius: 16px; background: rgba(12,35,57,.92); border: 1px solid rgba(84,217,255,.25); }
    .preview-stack h3 { margin: 0 0 10px; font-size: 19px; }
    .mini-row { display: flex; justify-content: space-between; align-items: center; padding: 9px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .tag { display: inline-flex; align-items: center; padding: 5px 9px; border: 1px solid rgba(84,217,255,.25); border-radius: 999px; color: #a6eaff; background: rgba(84,217,255,.07); font-size: 12px; white-space: nowrap; }
    .tag.violet { color: #c8beff; border-color: rgba(156,140,255,.3); background: rgba(156,140,255,.08); }
    .tag.orange { color: #ffd19b; border-color: rgba(255,178,91,.3); background: rgba(255,178,91,.07); }

    .split-layout { display: grid; grid-template-columns: 260px 1fr; gap: 48px; align-items: start; }
    .path-list { position: sticky; top: 105px; }
    .path-list a { display: flex; gap: 12px; align-items: center; padding: 14px 0; color: var(--subtle); border-bottom: 1px solid var(--line); transition: .2s; }
    .path-list a:hover { color: var(--text); padding-left: 6px; }
    .path-list b { color: var(--cyan); font-size: 12px; }
    .solution-board { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; }
    .solution-card { padding: 24px; min-height: 190px; transition: .25s; }
    .solution-card:hover { transform: translateY(-5px); box-shadow: var(--shadow), 0 0 30px rgba(84,217,255,.1); }
    .solution-card.tall { min-height: 300px; grid-row: span 2; }
    .solution-card h3 { margin: 18px 0 8px; font-size: 21px; }
    .solution-card p { color: var(--muted); font-size: 14px; margin: 0; }
    .number { color: var(--cyan); font-size: 13px; font-weight: 800; letter-spacing: .12em; }

    .filter-box { margin-top: 48px; padding: 20px; display: grid; grid-template-columns: 1.3fr .8fr .8fr auto; gap: 12px; align-items: end; }
    .field label { display: block; color: var(--muted); font-size: 12px; margin-bottom: 7px; }
    .field input, .field select {
      width: 100%; height: 44px; color: var(--text); background: rgba(3,13,25,.6);
      border: 1px solid var(--line); border-radius: 10px; padding: 0 12px; outline: none;
    }
    .field input::placeholder { color: #5f758b; }
    .field input:focus, .field select:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(84,217,255,.1); }
    .field select option { background: var(--ocean); }
    .form-note { grid-column: 1 / -1; color: var(--subtle); font-size: 12px; margin: 0; }

    .results-section { background: linear-gradient(180deg, rgba(16,35,58,.16), rgba(16,35,58,.55)); }
    .result-wrap { display: grid; grid-template-columns: 1fr 1.15fr; gap: 45px; align-items: center; }
    .result-number { font-size: clamp(70px, 10vw, 132px); line-height: .9; letter-spacing: -.08em; color: var(--cyan); text-shadow: 0 0 30px rgba(84,217,255,.25); font-weight: 800; }
    .result-list { border-left: 1px solid var(--line-strong); }
    .result-item { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 19px 0 19px 24px; border-bottom: 1px solid var(--line); }
    .result-item span { color: var(--muted); font-size: 14px; }
    .result-item strong { color: var(--text); font-size: 17px; }

    .insight-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 20px; }
    .insight-main { padding: 30px; min-height: 270px; position: relative; overflow: hidden; }
    .insight-main::before { content: "INDEX"; position: absolute; right: 22px; top: 18px; color: rgba(84,217,255,.16); font-size: 46px; font-weight: 800; letter-spacing: .1em; }
    .insight-main h3 { max-width: 580px; margin: 28px 0 14px; font-size: 26px; }
    .insight-main p, .insight-side p { color: var(--muted); font-size: 14px; }
    .insight-side { padding: 24px; }
    .insight-side h3 { margin: 0 0 16px; font-size: 19px; }
    .insight-link { display: flex; justify-content: space-between; gap: 12px; padding: 13px 0; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 13px; }
    .insight-link:hover { color: var(--cyan); }

    .testimonial { display: grid; grid-template-columns: 1fr 280px; gap: 20px; align-items: stretch; }
    .quote-card { padding: 40px; position: relative; }
    .quote-mark { color: var(--cyan); font-size: 68px; line-height: .7; font-family: Georgia, serif; }
    blockquote { margin: 25px 0 30px; max-width: 730px; font-size: clamp(22px, 3vw, 32px); line-height: 1.45; letter-spacing: -.03em; }
    .person { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
    .avatar { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; color: #07111f; background: linear-gradient(135deg, var(--cyan), var(--violet)); font-weight: 800; }
    .quote-side { display: flex; flex-direction: column; gap: 20px; }
    .quote-mini { padding: 23px; flex: 1; }
    .quote-mini p { color: var(--muted); font-size: 14px; margin: 12px 0 0; }

    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 22px; margin-top: 38px; }
    details { border-bottom: 1px solid var(--line); padding: 3px 0; }
    summary { list-style: none; display: flex; justify-content: space-between; gap: 16px; padding: 18px 0; cursor: pointer; font-weight: 700; font-size: 15px; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--cyan); font-size: 22px; font-weight: 400; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { color: var(--muted); font-size: 14px; margin: -3px 0 18px; padding-right: 30px; }

    .cta { padding: 55px; position: relative; overflow: hidden; }
    .cta::before { content: ""; position: absolute; width: 360px; height: 360px; right: -70px; top: -170px; border-radius: 50%; background: rgba(84,217,255,.18); filter: blur(15px); }
    .cta-content { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
    .cta h2 { margin: 12px 0 10px; font-size: clamp(28px, 4vw, 44px); line-height: 1.2; letter-spacing: -.05em; }
    .cta p { max-width: 650px; margin: 0; color: var(--muted); }
    .cta-actions { display: flex; gap: 10px; flex-wrap: wrap; flex: 0 0 auto; }

    footer { padding: 66px 0 26px; border-top: 1px solid var(--line); background: rgba(3, 12, 23, .56); }
    .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 50px; }
    .footer-brand p { max-width: 330px; color: var(--subtle); font-size: 13px; margin-top: 18px; }
    .footer-col h3 { font-size: 13px; color: var(--text); margin: 0 0 16px; }
    .footer-col a { display: block; color: var(--subtle); font-size: 13px; padding: 5px 0; transition: .2s; }
    .footer-col a:hover { color: var(--cyan); transform: translateX(3px); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 15px; margin-top: 52px; padding-top: 20px; color: #60778d; font-size: 12px; border-top: 1px solid var(--line); }
    .muted-rule { height: 1px; background: linear-gradient(90deg, var(--cyan), transparent); opacity: .3; margin-top: 30px; }

    @media (max-width: 1024px) {
      .nav-links { gap: 0; }
      .nav-search { width: 150px; }
      .hero-grid { gap: 35px; }
      .filter-box { grid-template-columns: 1fr 1fr; }
      .filter-box .btn { width: 100%; }
    }
    @media (max-width: 768px) {
      .container { width: min(100% - 32px, 620px); }
      .section { padding: 65px 0; }
      .nav-shell { min-height: 68px; gap: 12px; }
      .nav-links, .nav-search, .nav-shell > .btn-ghost { display: none; }
      .menu-btn { display: grid; place-items: center; margin-left: auto; }
      .mobile-nav.open { display: block; }
      .hero { min-height: auto; padding: 75px 0 62px; }
      .hero-grid, .split-layout, .result-wrap, .insight-grid, .testimonial { grid-template-columns: 1fr; }
      .hero::before { width: 330px; height: 330px; right: -160px; top: 180px; }
      .index-panel { margin-top: 12px; }
      .path-list { position: static; display: flex; gap: 12px; overflow-x: auto; padding-bottom: 10px; }
      .path-list a { min-width: 170px; border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
      .solution-board { grid-template-columns: 1fr; }
      .solution-card.tall { min-height: 210px; grid-row: auto; }
      .result-list { margin-top: 30px; }
      .faq-grid { grid-template-columns: 1fr; }
      .cta { padding: 32px 24px; }
      .cta-content { align-items: flex-start; flex-direction: column; }
      .cta-actions, .cta-actions .btn { width: 100%; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
      .footer-brand { grid-column: 1 / -1; }
    }
    @media (max-width: 520px) {
      .brand-name { font-size: 13px; }
      .hero h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-actions .btn { width: 100%; }
      .hero-points { gap: 16px; }
      .node-map { min-height: 285px; }
      .preview-stack { left: 4%; width: 92%; }
      .filter-box { grid-template-columns: 1fr; margin-top: 30px; }
      .form-note { grid-column: auto; }
      .quote-card { padding: 28px 22px; }
      blockquote { font-size: 22px; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; margin-top: 35px; }
    }

/* roulang page: category1 */
:root {
      --ink:#07111f; --ocean:#0b1728; --panel:#10233a; --panel-light:#142c46;
      --cyan:#54d9ff; --blue:#638cff; --violet:#9c8cff; --text:#eaf5ff;
      --muted:#9bb0c5; --subtle:#7189a0; --line:rgba(140,207,255,.16);
      --line-strong:rgba(84,217,255,.4); --radius:22px;
      --shadow:0 24px 70px rgba(0,0,0,.28);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--text);background:radial-gradient(circle at 12% 8%,rgba(36,121,189,.18),transparent 28rem),radial-gradient(circle at 92% 28%,rgba(95,76,194,.13),transparent 26rem),var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
    a{color:inherit;text-decoration:none}
    button,input,select{font:inherit}
    button{cursor:pointer}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .section{padding:86px 0;position:relative}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--cyan);font-size:12px;font-weight:700;letter-spacing:.14em}
    .eyebrow:before{content:"";width:28px;height:1px;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
    .section-title{margin:14px 0 12px;font-size:clamp(30px,4vw,46px);line-height:1.18;letter-spacing:-.045em;font-weight:800}
    .section-lead{max-width:700px;color:var(--muted);font-size:16px}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(7,17,31,.82);border-bottom:1px solid rgba(120,208,255,.12);backdrop-filter:blur(18px)}
    .nav-shell{min-height:76px;display:flex;align-items:center;gap:28px}
    .brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
    .brand-mark{width:30px;height:30px;border:1px solid var(--cyan);border-radius:10px;position:relative;transform:rotate(45deg);box-shadow:0 0 18px rgba(84,217,255,.28)}
    .brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:50%;background:var(--cyan)}
    .brand-mark:before{width:6px;height:6px;left:6px;top:6px}
    .brand-mark:after{width:6px;height:6px;right:6px;bottom:6px;background:var(--violet)}
    .brand-name{font-size:15px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .nav-links{display:flex;align-items:center;gap:4px;margin-right:auto}
    .nav-link{position:relative;color:var(--muted);padding:10px 13px;border-radius:10px;font-size:14px;transition:.25s ease}
    .nav-link:hover,.nav-link.active{color:var(--text);background:rgba(84,217,255,.07)}
    .nav-link.active:after{content:"";position:absolute;bottom:2px;left:14px;right:14px;height:2px;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
    .nav-search{width:190px;height:40px;display:flex;align-items:center;gap:8px;padding:0 12px;border:1px solid var(--line);border-radius:12px;background:rgba(7,17,31,.55);color:var(--muted)}
    .nav-search input{width:100%;border:0;outline:0;color:var(--text);background:transparent;font-size:13px}
    .nav-search:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(84,217,255,.1)}
    .btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 18px;border-radius:12px;font-size:14px;font-weight:700;transition:transform .22s,box-shadow .22s,border-color .22s,background .22s}
    .btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid rgba(84,217,255,.7);outline-offset:3px}
    .btn-primary{color:#03111c;background:linear-gradient(110deg,#58e0ff,#7a9cff);box-shadow:0 0 22px rgba(84,217,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(84,217,255,.42)}
    .btn-primary:active,.btn-ghost:active{transform:scale(.98)}
    .btn-ghost{color:var(--text);border:1px solid var(--line-strong);background:rgba(84,217,255,.035)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:var(--cyan);background:rgba(84,217,255,.1)}
    .menu-btn{display:none;color:var(--text);border:1px solid var(--line);background:transparent;width:44px;height:44px;border-radius:11px}
    .mobile-nav{display:none;padding:10px 0 18px;border-top:1px solid var(--line)}
    .mobile-nav a{display:block;padding:12px 4px;color:var(--muted)}
    .glass{background:linear-gradient(145deg,rgba(20,44,70,.82),rgba(9,25,43,.76));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);backdrop-filter:blur(14px)}
    .page-head{padding:86px 0 54px;position:relative;overflow:hidden;background-image:linear-gradient(rgba(84,217,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(84,217,255,.035) 1px,transparent 1px);background-size:54px 54px}
    .page-head:after{content:"";position:absolute;right:8%;top:25px;width:280px;height:280px;border:1px solid rgba(84,217,255,.12);border-radius:50%;box-shadow:0 0 0 42px rgba(84,217,255,.025),0 0 0 84px rgba(84,217,255,.018)}
    .head-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:60px;align-items:end;position:relative;z-index:1}
    .page-head h1{margin:18px 0 16px;max-width:760px;font-size:clamp(38px,5.5vw,64px);line-height:1.1;letter-spacing:-.06em;font-weight:800}
    .page-head h1 em{font-style:normal;color:var(--cyan);text-shadow:0 0 24px rgba(84,217,255,.3)}
    .head-copy{color:var(--muted);font-size:17px;max-width:720px}
    .index-summary{padding:22px}
    .summary-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;color:var(--subtle);font-size:12px}
    .signal{display:inline-flex;align-items:center;gap:7px;color:#a6eaff}
    .signal i{display:block;width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
    .summary-number{font-size:42px;line-height:1;font-weight:800;color:var(--text)}
    .summary-label{color:var(--muted);font-size:13px}
    .filter-bar{display:flex;gap:12px;align-items:end;flex-wrap:wrap;padding:20px;margin-top:28px}
    .field{display:flex;flex-direction:column;gap:7px;flex:1;min-width:190px}
    .field label{font-size:12px;color:var(--muted);font-weight:700}
    .field input,.field select{height:44px;padding:0 13px;color:var(--text);background:rgba(7,17,31,.7);border:1px solid var(--line);border-radius:11px;outline:0}
    .field input::placeholder{color:#6f879c}
    .field input:focus,.field select:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(84,217,255,.1)}
    .field select option{background:var(--ocean)}
    .filter-btn{margin-top:26px}
    .tag-rail{display:flex;gap:10px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:thin}
    .tag{display:inline-flex;align-items:center;white-space:nowrap;padding:7px 13px;border:1px solid rgba(84,217,255,.25);border-radius:999px;color:#a6eaff;background:rgba(84,217,255,.05);font-size:13px;transition:.2s}
    .tag:hover,.tag.selected{border-color:var(--cyan);background:rgba(84,217,255,.14);box-shadow:0 0 18px rgba(84,217,255,.14)}
    .content-layout{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start}
    .main-index{display:flex;flex-direction:column;gap:16px}
    .feature-card{padding:24px;display:grid;grid-template-columns:180px 1fr;gap:23px;transition:.25s}
    .feature-card:hover,.compact-card:hover,.side-panel:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 22px 55px rgba(0,0,0,.3),0 0 25px rgba(84,217,255,.08)}
    .visual{min-height:150px;border-radius:16px;position:relative;overflow:hidden;background:radial-gradient(circle at 30% 30%,rgba(84,217,255,.42),transparent 19%),linear-gradient(135deg,#102d49,#161b3c 58%,#0b1728);border:1px solid rgba(84,217,255,.2)}
    .visual:before{content:"";position:absolute;inset:18px;border:1px solid rgba(84,217,255,.24);border-radius:50%;box-shadow:0 0 0 20px rgba(84,217,255,.035)}
    .visual:after{content:"索引节点";position:absolute;left:16px;bottom:13px;color:#b8eaff;font-size:11px;letter-spacing:.1em}
    .card-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
    .card-tag{font-size:11px;color:var(--cyan);padding:3px 8px;border:1px solid rgba(84,217,255,.25);border-radius:6px;background:rgba(84,217,255,.06)}
    .time{color:var(--subtle);font-size:12px}
    .feature-card h2,.compact-card h3{margin:0 0 8px;font-size:21px;line-height:1.35}
    .feature-card p,.compact-card p{margin:0;color:var(--muted);font-size:14px}
    .card-link{display:inline-flex;margin-top:16px;color:var(--cyan);font-size:13px;font-weight:700;align-items:center;gap:7px}
    .card-link:hover{color:#fff}
    .compact-card{padding:20px;display:grid;grid-template-columns:76px 1fr;gap:16px;transition:.25s}
    .compact-card .visual{min-height:76px}
    .compact-card h3{font-size:17px;margin-bottom:5px}
    .side-stack{display:flex;flex-direction:column;gap:16px}
    .side-panel{padding:23px;transition:.25s}
    .side-panel h2{font-size:18px;margin:0 0 17px}
    .side-list{display:flex;flex-direction:column;gap:12px}
    .side-list a{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
    .side-list a:hover{color:var(--cyan)}
    .side-list b{color:var(--text);font-weight:600}
    .keyword-cloud{display:flex;gap:8px;flex-wrap:wrap}
    .keyword-cloud span{padding:6px 10px;color:var(--muted);font-size:12px;border:1px solid var(--line);border-radius:8px;background:rgba(7,17,31,.35)}
    .keyword-cloud span:hover{color:var(--cyan);border-color:var(--line-strong)}
    .notice{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:23px 27px;margin:70px 0 0;background:linear-gradient(100deg,rgba(84,217,255,.13),rgba(156,140,255,.1));border:1px solid var(--line-strong);border-radius:18px}
    .notice h2{font-size:20px;margin:0 0 5px}
    .notice p{margin:0;color:var(--muted);font-size:14px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
    details{border:1px solid var(--line);border-radius:15px;background:rgba(16,35,58,.58);transition:.2s}
    details:hover,details[open]{border-color:var(--line-strong)}
    summary{padding:18px 20px;cursor:pointer;font-weight:700;list-style:none;position:relative;padding-right:45px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:20px;color:var(--cyan);font-size:22px;font-weight:400}
    details[open] summary:after{content:"−"}
    details p{margin:0;padding:0 20px 19px;color:var(--muted);font-size:14px}
    .pagination{display:flex;justify-content:center;align-items:center;gap:9px;margin-top:42px}
    .page-number{width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);border-radius:11px;color:var(--muted);transition:.2s}
    .page-number:hover,.page-number.active{color:var(--text);border-color:var(--cyan);background:rgba(84,217,255,.12)}
    footer{padding:58px 0 24px;background:rgba(4,12,23,.72);border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:45px}
    .footer-brand p{max-width:310px;color:var(--muted);font-size:13px;margin-top:17px}
    .footer-col{display:flex;flex-direction:column;gap:10px}
    .footer-col h3{margin:0 0 7px;color:var(--text);font-size:14px}
    .footer-col a{color:var(--muted);font-size:13px;transition:.2s}
    .footer-col a:hover{color:var(--cyan);transform:translateX(3px)}
    .muted-rule{height:1px;background:var(--line);margin:40px 0 18px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;color:var(--subtle);font-size:12px}
    @media(max-width:1024px){.nav-shell{gap:15px}.nav-search{width:150px}.head-grid{gap:30px}}
    @media(max-width:768px){.container{width:min(100% - 32px,620px)}.nav-links,.nav-search{display:none}.nav-shell{justify-content:space-between}.menu-btn{display:block}.nav-shell>.btn{min-height:40px;padding:0 13px;font-size:13px}.mobile-nav.open{display:block}.page-head{padding:62px 0 36px}.head-grid,.content-layout{grid-template-columns:1fr}.index-summary{max-width:420px}.section{padding:62px 0}.feature-card{grid-template-columns:130px 1fr}.faq-grid{grid-template-columns:1fr}.notice{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
    @media(max-width:520px){.container{width:calc(100% - 28px)}.brand-name{font-size:13px}.page-head h1{font-size:40px}.head-copy{font-size:15px}.filter-bar{padding:16px}.field{min-width:100%}.filter-btn{width:100%;margin-top:4px}.feature-card{grid-template-columns:1fr;padding:17px}.feature-card .visual{min-height:120px}.compact-card{padding:16px}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:6px}.notice{padding:20px}.notice .btn{width:100%}}