/* roulang page: index */
:root{
      --ink:#080d18;
      --deep:#0d1426;
      --panel:rgba(20,31,56,.76);
      --panel-strong:#172542;
      --line:rgba(142,178,235,.18);
      --text:#f3f7ff;
      --muted:#9aaaca;
      --cyan:#63e5ff;
      --violet:#8d83ff;
      --coral:#ef9cae;
      --radius:20px;
      --shadow:0 22px 60px rgba(0,0,0,.34);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:
        radial-gradient(circle at 80% 0%,rgba(71,103,214,.22),transparent 32rem),
        radial-gradient(circle at 30% 40%,rgba(53,177,212,.08),transparent 28rem),
        var(--ink);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
      line-height:1.75;
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;inset:0;pointer-events:none;opacity:.22;
      background-image:linear-gradient(rgba(120,170,240,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,240,.06) 1px,transparent 1px);
      background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 75%);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    :focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
    .app-shell{min-height:100vh}
    .side-nav{
      position:fixed;z-index:20;left:0;top:0;bottom:0;width:248px;
      padding:28px 18px 22px;background:rgba(8,14,28,.88);
      border-right:1px solid var(--line);backdrop-filter:blur(18px);
      display:flex;flex-direction:column;
    }
    .brand{display:flex;align-items:center;gap:11px;padding:4px 8px 34px;font-weight:800;letter-spacing:-.04em}
    .brand-mark{width:35px;height:35px;border:1px solid var(--cyan);border-radius:11px;position:relative;box-shadow:0 0 22px rgba(99,229,255,.25)}
    .brand-mark:after{content:"";position:absolute;width:15px;height:2px;background:var(--cyan);top:16px;left:9px;box-shadow:0 -6px 0 var(--violet),0 6px 0 var(--violet)}
    .brand span{font-size:16px;line-height:1.25}
    .nav-label{font-size:11px;color:#64799f;letter-spacing:.14em;text-transform:uppercase;padding:0 12px 10px}
    .side-nav nav{display:grid;gap:7px}
    .nav-link{
      color:var(--muted);padding:12px 13px;border:1px solid transparent;border-radius:13px;
      display:flex;align-items:center;gap:10px;transition:.22s ease;
    }
    .nav-link:hover{color:var(--text);background:rgba(99,229,255,.07);border-color:var(--line)}
    .nav-link.active{color:var(--text);background:linear-gradient(100deg,rgba(99,229,255,.13),rgba(141,131,255,.12));border-color:rgba(99,229,255,.36);box-shadow:0 0 24px rgba(99,229,255,.08)}
    .nav-dot{width:7px;height:7px;border-radius:50%;background:#50668f}
    .active .nav-dot{background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
    .side-note{margin-top:auto;border-top:1px solid var(--line);padding:20px 8px 0;color:var(--muted);font-size:12px}
    .side-note strong{display:block;color:var(--coral);font-size:15px;margin-bottom:6px}
    .main-content{margin-left:248px}
    .mobile-bar{display:none}
    .container-xl{max-width:1260px}
    section{padding:96px 0}
    .hero{padding-top:78px;min-height:720px;display:flex;align-items:center}
    .eyebrow{color:var(--cyan);font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;margin-bottom:18px}
    h1,h2,h3{font-weight:780;letter-spacing:-.045em;line-height:1.2}
    h1{font-size:clamp(38px,5.1vw,70px);max-width:720px;margin:0 0 25px}
    h2{font-size:clamp(28px,3.2vw,44px);margin:0 0 15px}
    h3{font-size:20px;margin:0 0 10px}
    .lead{color:#b7c4df;font-size:18px;max-width:650px}
    .hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:65px;align-items:center;width:100%}
    .actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0}
    .btn-glow,.btn-quiet{
      min-height:48px;padding:11px 20px;border-radius:13px;border:1px solid transparent;
      display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.22s ease;font-weight:700
    }
    .btn-glow{color:#06131d;background:linear-gradient(110deg,var(--cyan),#9eeaff);box-shadow:0 0 25px rgba(99,229,255,.3)}
    .btn-glow:hover{transform:translateY(-2px);box-shadow:0 0 35px rgba(99,229,255,.52);color:#06131d}
    .btn-quiet{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.04)}
    .btn-quiet:hover{border-color:var(--cyan);background:rgba(99,229,255,.09)}
    .age-alert{border-left:3px solid var(--coral);padding:9px 14px;color:#bfcbe1;font-size:13px;max-width:610px;background:rgba(239,156,174,.05)}
    .stage{
      min-height:420px;padding:25px;border:1px solid rgba(111,188,255,.28);border-radius:28px;
      background:linear-gradient(145deg,rgba(30,49,88,.86),rgba(12,22,43,.78));
      box-shadow:var(--shadow),inset 0 1px rgba(255,255,255,.08);position:relative;overflow:hidden
    }
    .stage:before{content:"";position:absolute;width:240px;height:240px;background:var(--violet);filter:blur(100px);opacity:.18;right:-50px;top:-70px}
    .stage-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:23px}
    .stage-title{font-size:14px;font-weight:700}.status{font-size:11px;color:var(--cyan);display:flex;gap:6px;align-items:center}.status i{width:6px;height:6px;border-radius:50%;background:var(--cyan)}
    .keyword-box{padding:21px;border:1px solid rgba(99,229,255,.25);border-radius:17px;background:rgba(5,13,28,.48);margin-bottom:18px}
    .keyword{font-size:25px;font-weight:800;letter-spacing:-.04em}
    .tag{display:inline-flex;padding:5px 10px;border-radius:99px;color:#cbd8f1;background:rgba(141,131,255,.13);border:1px solid rgba(141,131,255,.25);font-size:12px;margin:5px 4px 0 0}
    .metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}
    .metric{padding:14px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.metric b{display:block;color:var(--text);font-size:19px}
    .section-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:34px}
    .section-head p{color:var(--muted);max-width:560px;margin:0}
    .glass{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);backdrop-filter:blur(14px)}
    .feature-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:22px}
    .feature-main{padding:34px;min-height:310px;background:linear-gradient(145deg,rgba(99,229,255,.11),rgba(21,30,61,.74))}
    .feature-main p,.feature-item p,.scene p,.case p,.price-card p,.faq-text{color:var(--muted);font-size:14px}
    .feature-list{display:grid;gap:12px}
    .feature-item{padding:22px;display:flex;gap:16px;align-items:flex-start}
    .icon-box{width:38px;height:38px;flex:none;border-radius:12px;background:rgba(99,229,255,.1);border:1px solid rgba(99,229,255,.25);color:var(--cyan);display:grid;place-items:center;font-weight:800}
    .scene-rail{display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:15px;align-items:stretch}
    .scene{padding:25px;position:relative;overflow:hidden}.scene:nth-child(2){transform:translateY(24px);background:linear-gradient(145deg,rgba(141,131,255,.16),rgba(20,30,57,.8))}
    .scene-num{font-size:42px;color:rgba(99,229,255,.35);font-weight:900;line-height:1;margin-bottom:18px}
    .index-line{height:3px;background:linear-gradient(90deg,var(--cyan),transparent);margin-top:24px}
    .preview-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}
    .case{padding:28px}.case-screen{min-height:190px;border-radius:16px;padding:22px;background:#0b1429;border:1px solid var(--line)}
    .screen-line{height:10px;width:62%;background:#283b67;border-radius:99px;margin-bottom:15px}.screen-line.short{width:36%}.screen-row{display:flex;gap:8px;margin-top:22px}.screen-chip{height:42px;flex:1;border:1px solid rgba(99,229,255,.25);border-radius:9px;background:rgba(99,229,255,.08)}
    .case-side{padding:24px;display:grid;align-content:center;gap:18px}.stat b{display:block;font-size:28px;color:var(--cyan)}.stat span{font-size:12px;color:var(--muted)}
    .price-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.price-card{padding:31px}.price-card.primary{border-color:rgba(99,229,255,.45);background:linear-gradient(145deg,rgba(44,73,125,.62),rgba(15,25,47,.85))}
    .price{font-size:39px;font-weight:800;margin:18px 0}.price small{font-size:13px;color:var(--muted);font-weight:400}
    .check-list{list-style:none;padding:0;margin:20px 0;color:#c4d0e6;font-size:14px}.check-list li{padding:7px 0;border-bottom:1px solid rgba(255,255,255,.06)}.check-list li:before{content:"✓";color:var(--cyan);margin-right:9px}
    .faq-wrap{max-width:900px}.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}.accordion-button{background:transparent!important;color:var(--text)!important;box-shadow:none!important;padding:21px 0;font-weight:700}.accordion-button:after{filter:invert(1) brightness(2)}.accordion-body{padding:0 30px 20px 0;color:var(--muted);font-size:14px}
    .cta{padding:42px;border:1px solid rgba(99,229,255,.3);background:linear-gradient(100deg,rgba(34,67,107,.78),rgba(41,29,82,.72));border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .cta p{color:#becce5;margin:8px 0 0}.footer{padding:65px 0 30px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr;gap:35px}.footer h3{font-size:15px;color:var(--text);letter-spacing:0}.footer a{display:block;margin:7px 0;color:var(--muted)}.footer a:hover{color:var(--cyan)}.copyright{border-top:1px solid var(--line);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:20px}
    .feedback{margin-top:28px;padding:28px}.form-control{background:rgba(4,12,26,.6)!important;border-color:var(--line)!important;color:var(--text)!important;border-radius:11px;padding:12px}.form-control::placeholder{color:#687a9c}.form-label{font-size:13px;color:#c8d4e8}
    @media(max-width:991px){.side-nav{width:210px}.main-content{margin-left:210px}.hero-grid,.feature-layout,.preview-grid,.price-layout{grid-template-columns:1fr}.hero{padding-top:55px}.scene-rail{grid-template-columns:1fr}.scene:nth-child(2){transform:none}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:767px){.side-nav{display:none}.main-content{margin-left:0}.mobile-bar{display:flex;position:sticky;top:0;z-index:30;padding:14px 18px;justify-content:space-between;align-items:center;background:rgba(8,14,28,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.mobile-brand{font-weight:800;font-size:14px}.menu-btn{color:var(--text);background:transparent;border:1px solid var(--line);border-radius:9px;padding:5px 10px}.hero{padding:65px 0 55px;min-height:auto}section{padding:68px 0}.hero-grid{gap:34px}.stage{min-height:0}.section-head{display:block}.section-head p{margin-top:13px}.cta{display:block;padding:28px}.cta .btn-glow{margin-top:20px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}}
    @media(max-width:520px){h1{font-size:39px}.lead{font-size:16px}.metric-row{grid-template-columns:1fr}.feature-main,.case,.price-card{padding:23px}.keyword{font-size:21px}.actions .btn-glow,.actions .btn-quiet{width:100%}.stage{padding:18px}}

/* roulang page: category1 */
:root{
            --ink:#080d18;
            --deep:#0d1426;
            --panel:rgba(20,31,56,.76);
            --panel-strong:#172542;
            --line:rgba(142,178,235,.18);
            --text:#f3f7ff;
            --muted:#9aaaca;
            --cyan:#63e5ff;
            --violet:#8d83ff;
            --coral:#ef9cae;
            --radius:20px;
            --shadow:0 22px 60px rgba(0,0,0,.34);
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;color:var(--text);
            background:
                radial-gradient(circle at 80% 0%,rgba(71,103,214,.22),transparent 32rem),
                radial-gradient(circle at 30% 40%,rgba(53,177,212,.08),transparent 28rem),
                var(--ink);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
            line-height:1.75;overflow-x:hidden;
        }
        body:before{
            content:"";position:fixed;inset:0;pointer-events:none;opacity:.22;
            background-image:linear-gradient(rgba(120,170,240,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,240,.06) 1px,transparent 1px);
            background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 75%);
        }
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input,textarea,select{font:inherit}
        h1,h2,h3,p{margin-top:0}
        h1,h2,h3{letter-spacing:-.04em}
        h1{font-size:clamp(2.4rem,5vw,4.5rem);line-height:1.12}
        h2{font-size:clamp(1.8rem,3vw,2.7rem);line-height:1.2}
        h3{font-size:1.12rem}
        .container-xl{max-width:1260px}
        .side-nav{
            position:fixed;z-index:20;left:0;top:0;bottom:0;width:248px;
            padding:28px 18px 22px;background:rgba(8,14,28,.88);
            border-right:1px solid var(--line);backdrop-filter:blur(18px);
            display:flex;flex-direction:column;
        }
        .brand{display:flex;align-items:center;gap:11px;padding:4px 8px 34px;font-weight:800;letter-spacing:-.04em}
        .brand-mark{width:35px;height:35px;border:1px solid var(--cyan);border-radius:11px;position:relative;box-shadow:0 0 22px rgba(99,229,255,.25);flex:0 0 auto}
        .brand-mark:after{content:"";position:absolute;width:15px;height:2px;background:var(--cyan);top:16px;left:9px;box-shadow:0 -6px 0 var(--violet),0 6px 0 var(--violet)}
        .brand span{font-size:16px;line-height:1.25}
        .nav-label{font-size:11px;color:#64799f;letter-spacing:.14em;text-transform:uppercase;padding:0 12px 10px}
        .side-nav nav{display:grid;gap:7px}
        .nav-link{color:var(--muted);padding:12px 13px;border:1px solid transparent;border-radius:13px;display:flex;align-items:center;gap:10px;transition:.22s ease}
        .nav-link:hover{color:var(--text);background:rgba(99,229,255,.07);border-color:var(--line)}
        .nav-link.active{color:var(--text);background:linear-gradient(100deg,rgba(99,229,255,.13),rgba(141,131,255,.12));border-color:rgba(99,229,255,.36);box-shadow:0 0 24px rgba(99,229,255,.08)}
        .nav-dot{width:7px;height:7px;border-radius:50%;background:#50668f;flex:0 0 auto}
        .active .nav-dot{background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
        .side-note{margin-top:auto;padding:16px 13px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
        .side-note strong{display:block;color:var(--coral);font-size:13px;margin-bottom:4px}
        .main-content{margin-left:248px}
        .mobile-bar{display:none}
        .page-wrap{max-width:1260px;margin:auto;padding:0 28px}
        section{padding:82px 0}
        .breadcrumb{padding-top:36px;margin-bottom:25px;color:var(--muted);font-size:13px}
        .breadcrumb a{color:var(--cyan)}
        .hero-category{padding:15px 0 70px}
        .hero-grid{display:grid;grid-template-columns:1fr .82fr;gap:60px;align-items:center}
        .eyebrow{color:var(--cyan);font-size:12px;letter-spacing:.16em;font-weight:700;margin-bottom:18px}
        .lead{color:#b7c4df;font-size:18px;max-width:700px}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
        .btn-glow,.btn-quiet{
            min-height:48px;padding:11px 20px;border-radius:13px;border:1px solid transparent;
            display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.22s ease;font-weight:700
        }
        .btn-glow{color:#06131d;background:linear-gradient(110deg,var(--cyan),#9eeaff);box-shadow:0 0 25px rgba(99,229,255,.3)}
        .btn-glow:hover{transform:translateY(-2px);box-shadow:0 0 35px rgba(99,229,255,.52);color:#06131d}
        .btn-quiet{color:var(--text);border-color:var(--line);background:rgba(255,255,255,.04)}
        .btn-quiet:hover{border-color:var(--cyan);background:rgba(99,229,255,.09)}
        .stage,.glass-card{
            border:1px solid rgba(111,188,255,.28);border-radius:var(--radius);
            background:linear-gradient(145deg,rgba(30,49,88,.86),rgba(12,22,43,.78));
            box-shadow:var(--shadow),inset 0 1px rgba(255,255,255,.08);
        }
        .stage{padding:26px;position:relative;overflow:hidden;min-height:330px}
        .stage:before{content:"";position:absolute;width:220px;height:220px;background:var(--violet);filter:blur(95px);opacity:.18;right:-55px;top:-65px}
        .stage-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:24px;position:relative}
        .stage-title{font-size:14px;font-weight:700}
        .status{color:var(--cyan);font-size:12px}
        .tag{display:inline-flex;padding:5px 10px;border-radius:99px;color:#cbd8f1;background:rgba(141,131,255,.13);border:1px solid rgba(141,131,255,.25);font-size:12px;margin:5px 4px 0 0}
        .stage-panel{position:relative;padding:22px;border-radius:16px;background:rgba(5,12,26,.42);border:1px solid rgba(255,255,255,.07)}
        .stage-panel h3{margin-bottom:8px}
        .stage-panel p{color:var(--muted);font-size:13px;margin-bottom:16px}
        .metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}
        .metric{padding:13px 10px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.035)}
        .metric b{display:block;color:var(--text);font-size:19px}
        .metric span{color:var(--muted);font-size:11px}
        .section-head{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:30px}
        .section-head p{color:var(--muted);max-width:570px;margin:0}
        .filter-bar{display:flex;gap:12px;flex-wrap:wrap;padding:18px;margin-bottom:24px}
        .filter-bar .form-control,.filter-bar .form-select{min-height:46px;color:var(--text);background:rgba(5,13,29,.72);border:1px solid var(--line);border-radius:11px}
        .filter-bar .form-control::placeholder{color:#7183a4}
        .filter-bar .form-control:focus,.filter-bar .form-select:focus{border-color:var(--cyan);box-shadow:0 0 0 .2rem rgba(99,229,255,.12)}
        .form-select option{background:var(--deep);color:var(--text)}
        .index-layout{display:grid;grid-template-columns:1.45fr .55fr;gap:20px}
        .index-matrix{display:grid;grid-template-columns:1.2fr .8fr;gap:15px}
        .index-card{padding:24px;min-height:205px;position:relative;overflow:hidden;transition:.25s ease}
        .index-card:hover{transform:translateY(-4px);border-color:rgba(99,229,255,.48);box-shadow:0 18px 40px rgba(0,0,0,.28)}
        .index-card.featured{grid-row:span 2;min-height:425px;background:linear-gradient(145deg,rgba(40,72,119,.78),rgba(18,28,56,.83))}
        .index-card:after{content:"";position:absolute;width:120px;height:120px;right:-36px;bottom:-42px;border-radius:50%;background:rgba(99,229,255,.12);filter:blur(12px)}
        .card-kicker{color:var(--cyan);font-size:11px;letter-spacing:.1em;margin-bottom:16px}
        .index-card p,.side-card p{color:var(--muted);font-size:14px}
        .card-meta{display:flex;gap:9px;flex-wrap:wrap;color:#8193b5;font-size:12px;margin:17px 0}
        .mini-status{padding:3px 8px;border-radius:99px;color:#b9f4fb;background:rgba(99,229,255,.1);border:1px solid rgba(99,229,255,.24)}
        .side-stack{display:grid;gap:15px;align-content:start}
        .side-card{padding:22px}
        .side-card h3{margin-bottom:12px}
        .side-list{padding:0;margin:0;list-style:none}
        .side-list li{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.07);color:#c5d2e9;font-size:13px}
        .side-list li:last-child{border-bottom:0}
        .side-list span{display:block;color:var(--muted);font-size:11px}
        .scene-rail{display:grid;grid-template-columns:.8fr 1.2fr;gap:18px;align-items:stretch}
        .scene-intro{padding:30px;background:linear-gradient(145deg,rgba(141,131,255,.14),rgba(18,28,55,.78))}
        .scene-list{display:grid;gap:12px}
        .scene-item{display:flex;gap:18px;align-items:flex-start;padding:20px 22px}
        .scene-num{font-size:28px;color:var(--cyan);font-weight:800;line-height:1}
        .scene-item p{color:var(--muted);font-size:13px;margin:4px 0 0}
        .example-layout{display:grid;grid-template-columns:1.4fr .6fr;gap:18px}
        .example-main{padding:30px;min-height:245px}
        .example-main p{color:var(--muted);max-width:650px}
        .path-line{display:flex;align-items:center;gap:8px;margin-top:25px;flex-wrap:wrap}
        .path-step{padding:9px 13px;border-radius:10px;background:rgba(99,229,255,.08);border:1px solid rgba(99,229,255,.2);font-size:12px;color:#d2e5f9}
        .path-arrow{color:var(--cyan)}
        .example-stats{display:grid;gap:12px}
        .stat-box{padding:22px}
        .stat-box b{display:block;font-size:27px;color:var(--cyan);line-height:1.2}
        .stat-box span{font-size:12px;color:var(--muted)}
        .cta{padding:38px;border:1px solid rgba(99,229,255,.3);background:linear-gradient(100deg,rgba(34,67,107,.78),rgba(41,29,82,.72));border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}
        .cta p{color:#becce5;margin:8px 0 0}
        .faq-wrap{max-width:920px}
        .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
        .accordion-button{background:transparent!important;color:var(--text)!important;box-shadow:none!important;padding:21px 0;font-weight:700}
        .accordion-button:after{filter:invert(1) brightness(2)}
        .accordion-body{padding:0 30px 20px 0;color:var(--muted);font-size:14px}
        .footer{padding:65px 0 30px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
        .footer-grid{display:grid;grid-template-columns:1.5fr .7fr .8fr;gap:45px}
        .footer h3{color:var(--text);font-size:14px;margin-bottom:15px}
        .footer a{display:block;margin:8px 0;color:var(--muted);transition:.2s}
        .footer a:hover{color:var(--cyan)}
        .footer p{max-width:400px}
        .footer .brand{padding:0;margin-bottom:15px;color:var(--text)}
        .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:42px;padding-top:20px;font-size:12px}
        .notice{color:var(--coral);font-size:12px;margin-top:18px}
        .feedback{padding-top:20px}
        :focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
        @media(max-width:1100px){
            .side-nav{width:220px}.main-content{margin-left:220px}
            .hero-grid{gap:30px}.index-layout,.example-layout{grid-template-columns:1fr}
        }
        @media(max-width:768px){
            .side-nav{display:none}
            .main-content{margin-left:0}
            .mobile-bar{display:flex;position:sticky;top:0;z-index:30;justify-content:space-between;align-items:center;padding:14px 18px;background:rgba(8,14,28,.93);border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}
            .mobile-bar .brand{padding:0;font-size:14px}.mobile-bar .brand span{font-size:14px}
            .menu-btn{border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--text);border-radius:10px;padding:8px 12px}
            .mobile-menu{display:none;position:absolute;top:68px;left:12px;right:12px;padding:12px;background:#101a31;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow)}
            .mobile-menu.show{display:grid;gap:5px}
            .page-wrap{padding:0 18px}
            section{padding:60px 0}.hero-category{padding:20px 0 50px}
            .hero-grid,.scene-rail{grid-template-columns:1fr}
            .index-matrix{grid-template-columns:1fr}
            .index-card.featured{grid-row:auto;min-height:280px}
            .section-head{display:block}.section-head p{margin-top:12px}
            .footer-grid{grid-template-columns:1fr;gap:25px}
            .copyright{display:block}.copyright span{display:block;margin-top:7px}
        }
        @media(max-width:520px){
            h1{font-size:2.35rem}.lead{font-size:16px}
            .hero-actions .btn-glow,.hero-actions .btn-quiet{width:100%}
            .stage{padding:18px}.metric-row{gap:6px}.metric{padding:10px 7px}
            .metric b{font-size:16px}.filter-bar{padding:13px}.filter-bar>*{width:100%!important}
            .cta{display:block;padding:27px}.cta .btn-glow{width:100%;margin-top:20px}
            .path-line{display:block}.path-step{display:inline-block;margin:4px 0}.path-arrow{display:none}
        }