/* roulang page: index */
:root{
      --bg:#070d1b;
      --bg-soft:#0b1428;
      --panel:rgba(18,31,57,.74);
      --panel-strong:#101e38;
      --line:rgba(145,181,239,.18);
      --line-bright:rgba(91,211,255,.45);
      --text:#eef5ff;
      --muted:#9aacc9;
      --dim:#6e81a2;
      --cyan:#61dcff;
      --blue:#6b8cff;
      --violet:#9a78ff;
      --rose:#d985c7;
      --radius-lg:26px;
      --radius-md:18px;
      --radius-sm:12px;
      --shadow:0 24px 70px rgba(0,0,0,.35);
      --glow:0 0 28px rgba(97,220,255,.2);
      --ease:all .28s ease;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      background:
        radial-gradient(circle at 78% 8%,rgba(82,95,220,.18),transparent 28rem),
        radial-gradient(circle at 8% 35%,rgba(36,156,204,.1),transparent 25rem),
        var(--bg);
      color:var(--text);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      font-size:16px;
      line-height:1.8;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;inset:0;pointer-events:none;opacity:.2;
      background-image:linear-gradient(rgba(130,170,235,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(130,170,235,.045) 1px,transparent 1px);
      background-size:54px 54px;
      mask-image:linear-gradient(to bottom,black,transparent 72%);
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    .container{width:min(1200px,calc(100% - 48px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:20;
      background:rgba(7,13,27,.82);
      backdrop-filter:blur(18px);
      border-bottom:1px solid var(--line);
    }
    .nav-shell{min-height:76px;display:flex;align-items:center;gap:28px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .brand-mark{
      width:34px;height:34px;border-radius:11px;
      background:linear-gradient(145deg,var(--cyan),var(--blue) 55%,var(--violet));
      box-shadow:var(--glow);position:relative
    }
    .brand-mark::after{content:"";position:absolute;width:10px;height:10px;border:2px solid #071021;border-radius:50%;left:12px;top:9px}
    .brand-name{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
    .main-nav a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--text);background:rgba(97,220,255,.09)}
    .nav-actions{display:flex;gap:9px}
    .button{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:43px;padding:0 18px;border-radius:12px;border:1px solid transparent;
      font-size:14px;font-weight:700;cursor:pointer;transition:var(--ease)
    }
    .button.primary{background:linear-gradient(110deg,#55d9f7,#7089ff);color:#071021;box-shadow:0 8px 24px rgba(83,192,255,.23)}
    .button.primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(83,192,255,.36)}
    .button.ghost{border-color:var(--line);background:rgba(17,30,56,.6);color:var(--text)}
    .button.ghost:hover{border-color:var(--line-bright);background:rgba(55,90,151,.25)}
    .button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid rgba(97,220,255,.55);outline-offset:3px}
    .menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);padding:7px 10px;border-radius:9px}
    .hero{padding:78px 0 66px;position:relative}
    .hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:62px;align-items:center}
    .eyebrow,.section-kicker{color:var(--cyan);font-size:12px;letter-spacing:.16em;font-weight:800;text-transform:uppercase}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,65px);line-height:1.15;letter-spacing:-.065em;margin:16px 0 22px;max-width:700px}
    h2{font-size:clamp(28px,3.5vw,42px);line-height:1.25;letter-spacing:-.045em;margin:9px 0 14px}
    h3{font-size:19px;line-height:1.4;margin:0 0 8px}
    .hero-copy{font-size:18px;color:var(--muted);max-width:650px}
    .hero-actions{display:flex;gap:12px;margin:30px 0 22px;flex-wrap:wrap}
    .age-note{display:flex;gap:10px;align-items:flex-start;color:var(--dim);font-size:13px;max-width:570px}
    .age-note strong{color:#d7e7ff}
    .hero-stage{
      min-height:390px;padding:20px;border:1px solid var(--line);
      border-radius:var(--radius-lg);background:linear-gradient(145deg,rgba(26,46,82,.84),rgba(9,18,38,.82));
      box-shadow:var(--shadow);position:relative;overflow:hidden
    }
    .hero-stage::before{content:"";position:absolute;width:240px;height:240px;border-radius:50%;background:rgba(97,220,255,.18);filter:blur(55px);right:-70px;top:-70px}
    .stage-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px;border-bottom:1px solid var(--line);padding:4px 4px 16px}
    .stage-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);margin-right:7px}
    .cover-mosaic{display:grid;grid-template-columns:1.35fr .8fr .8fr;grid-template-rows:132px 132px;gap:10px;margin-top:16px}
    .cover{border-radius:14px;overflow:hidden;position:relative;background:linear-gradient(140deg,#20385d,#4f407b)}
    .cover:first-child{grid-row:span 2;background:linear-gradient(145deg,#203a62,#73517d)}
    .cover:nth-child(2){background:linear-gradient(145deg,#15495f,#28336b)}
    .cover:nth-child(3){background:linear-gradient(145deg,#3c315e,#183e5a)}
    .cover:nth-child(4){background:linear-gradient(145deg,#263859,#5b3e70)}
    .cover::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 35%,rgba(4,9,20,.85))}
    .cover span{position:absolute;z-index:1;bottom:11px;left:12px;right:8px;font-size:12px;color:#e7f1ff}
    .stage-bottom{display:flex;gap:8px;flex-wrap:wrap;margin-top:17px}
    .tag{display:inline-flex;padding:5px 10px;border:1px solid var(--line);border-radius:999px;color:#b6d9f2;background:rgba(97,220,255,.06);font-size:12px}
    .tag.hot{border-color:rgba(154,120,255,.5);color:#d2c4ff}
    section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-head p{max-width:580px;color:var(--muted);margin:0}
    .discovery{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
    .glass{border:1px solid var(--line);background:var(--panel);backdrop-filter:blur(16px);border-radius:var(--radius-md);box-shadow:0 16px 45px rgba(0,0,0,.16)}
    .feature-panel{padding:28px;min-height:250px;background:linear-gradient(135deg,rgba(25,54,91,.9),rgba(16,27,55,.75))}
    .feature-panel p,.mini-panel p,.scene p,.quote p,.info-list li{color:var(--muted)}
    .index-row{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0}
    .mini-stack{display:grid;gap:18px}
    .mini-panel{padding:23px;min-height:116px}
    .mini-panel:hover,.scene:hover,.content-card:hover{transform:translateY(-4px);border-color:var(--line-bright)}
    .mini-panel,.scene,.content-card{transition:var(--ease)}
    .mini-label{font-size:12px;color:var(--cyan);margin-bottom:8px}
    .scenes{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px;align-items:stretch}
    .scene{padding:24px;min-height:190px;position:relative;overflow:hidden}
    .scene.main-scene{grid-row:span 2;min-height:398px;background:linear-gradient(155deg,rgba(33,52,91,.9),rgba(13,23,47,.75));display:flex;flex-direction:column;justify-content:end}
    .scene.main-scene::before{content:"01";position:absolute;right:22px;top:12px;font-size:90px;font-weight:900;color:rgba(97,220,255,.08)}
    .scene-number{color:var(--violet);font-weight:800;font-size:13px}
    .content-layout{display:grid;grid-template-columns:1fr 340px;gap:18px}
    .content-card{display:grid;grid-template-columns:170px 1fr;gap:20px;padding:14px;border:1px solid var(--line);background:var(--panel);border-radius:var(--radius-md);margin-bottom:14px}
    .thumb{min-height:140px;border-radius:13px;position:relative;overflow:hidden;background:linear-gradient(140deg,#24476c,#6a4a77)}
    .thumb::after{content:"适龄内容";position:absolute;bottom:10px;left:10px;padding:3px 7px;border-radius:5px;background:rgba(3,9,20,.72);font-size:11px;color:#dcecff}
    .content-card p{color:var(--muted);font-size:14px;margin-bottom:10px}
    .meta{color:var(--dim);font-size:12px;display:flex;gap:12px;flex-wrap:wrap}
    .content-card h3 a:hover{color:var(--cyan)}
    .ranking{padding:24px}
    .ranking h3{margin-bottom:18px}
    .rank-item{display:grid;grid-template-columns:30px 1fr auto;gap:10px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
    .rank-item:last-child{border-bottom:0}
    .rank-no{color:var(--cyan);font-size:18px;font-weight:800}
    .rank-title{font-size:14px}
    .rank-sub{font-size:12px;color:var(--dim)}
    .trend{font-size:12px;color:#91e5c1}
    .access-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:18px}
    .access-card{padding:30px;background:linear-gradient(135deg,rgba(32,54,94,.86),rgba(15,26,53,.78))}
    .access-card p,.note-card p{color:var(--muted)}
    .note-card{padding:26px}
    .note-card ul{list-style:none;margin:16px 0 0;padding:0}
    .note-card li{padding:9px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
    .note-card li::before{content:"✓";color:var(--cyan);margin-right:9px}
    .faq-wrap{max-width:900px;margin:0 auto}
    .faq-item{border:1px solid var(--line);border-radius:14px;background:rgba(14,27,50,.62);margin-bottom:10px;overflow:hidden}
    .faq-item summary{padding:19px 22px;cursor:pointer;list-style:none;font-weight:700;display:flex;justify-content:space-between;gap:20px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"＋";color:var(--cyan);font-size:20px;line-height:1}
    .faq-item[open] summary::after{content:"−"}
    .faq-answer{padding:0 22px 20px;color:var(--muted);font-size:14px;max-width:820px}
    .bottom-cta{padding:42px;border:1px solid var(--line-bright);border-radius:var(--radius-lg);background:linear-gradient(110deg,rgba(27,59,94,.85),rgba(39,31,79,.72));display:flex;justify-content:space-between;align-items:center;gap:25px;box-shadow:var(--glow)}
    .bottom-cta p{color:#b9c9e2;margin:0}
    .site-footer{border-top:1px solid var(--line);padding:52px 0 22px;background:rgba(4,9,19,.72)}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px}
    .footer-title{font-weight:800;margin-bottom:14px}
    .footer-copy{color:var(--muted);font-size:13px;max-width:310px}
    .footer-links{list-style:none;padding:0;margin:0}
    .footer-links li{margin:8px 0;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--cyan)}
    .footer-bottom{border-top:1px solid var(--line);margin-top:35px;padding-top:18px;color:var(--dim);font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    .notice{color:#b1bfd5;font-size:12px}
    @media(max-width:900px){
      .main-nav{gap:0}.main-nav a{padding:8px 8px}
      .hero-grid,.discovery,.content-layout,.access-grid{grid-template-columns:1fr}
      .hero-stage{max-width:680px}
      .scenes{grid-template-columns:1fr 1fr}.scene.main-scene{grid-row:auto;grid-column:span 2;min-height:260px}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
    }
    @media(max-width:680px){
      .container{width:min(100% - 30px,1200px)}
      .nav-shell{min-height:68px;gap:12px}.brand-name{font-size:15px}
      .menu-toggle{display:block;margin-left:auto}
      .main-nav{display:none;position:absolute;left:15px;right:15px;top:67px;padding:12px;flex-direction:column;align-items:stretch;background:#0d1930;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
      .main-nav.open{display:flex}.main-nav a{padding:12px}
      .nav-actions{display:none}
      .hero{padding:54px 0 40px}h1{font-size:38px}
      .hero-copy{font-size:16px}.hero-stage{min-height:320px;padding:14px}
      .cover-mosaic{grid-template-rows:105px 105px}
      section{padding:54px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .scenes{grid-template-columns:1fr}.scene.main-scene{grid-column:auto;min-height:260px}
      .content-card{grid-template-columns:104px 1fr;gap:13px}.thumb{min-height:115px}
      .content-card h3{font-size:16px}.content-card p{font-size:13px;line-height:1.6}
      .bottom-cta{display:block;padding:28px}.bottom-cta .button{margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:span 2}
      .footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
    }

/* roulang page: category2 */
:root{
      --bg:#070d1b;
      --bg-soft:#0b1428;
      --panel:rgba(18,31,57,.74);
      --panel-strong:#101e38;
      --panel-light:rgba(25,48,84,.72);
      --line:rgba(145,181,239,.18);
      --line-bright:rgba(91,211,255,.45);
      --text:#eef5ff;
      --muted:#9aacc9;
      --dim:#6e81a2;
      --cyan:#61dcff;
      --blue:#6b8cff;
      --violet:#9a78ff;
      --rose:#d985c7;
      --green:#77e0c1;
      --radius-lg:26px;
      --radius-md:18px;
      --radius-sm:12px;
      --shadow:0 24px 70px rgba(0,0,0,.35);
      --glow:0 0 28px rgba(97,220,255,.2);
      --ease:all .28s ease;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;background:
      radial-gradient(circle at 78% 7%,rgba(82,95,220,.18),transparent 28rem),
      radial-gradient(circle at 7% 38%,rgba(36,156,204,.1),transparent 25rem),
      var(--bg);color:var(--text);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      font-size:16px;line-height:1.8;overflow-x:hidden
    }
    body::before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.18;background-image:linear-gradient(rgba(130,170,235,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(130,170,235,.045) 1px,transparent 1px);background-size:54px 54px;mask-image:linear-gradient(to bottom,#000,transparent 75%)}
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    .container{width:min(1200px,calc(100% - 48px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(7,13,27,.84);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
    .nav-shell{min-height:76px;display:flex;align-items:center;gap:28px}
    .brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .brand-mark{width:34px;height:34px;border-radius:11px;background:linear-gradient(145deg,var(--cyan),var(--blue) 55%,var(--violet));box-shadow:var(--glow);position:relative}
    .brand-mark::after{content:"";position:absolute;width:10px;height:10px;border:2px solid #071021;border-radius:50%;left:12px;top:9px}
    .brand-name{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
    .main-nav a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px}
    .main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--text);background:rgba(97,220,255,.09)}
    .nav-actions{display:flex;gap:9px}
    .button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:43px;padding:0 18px;border-radius:12px;border:1px solid transparent;font-size:14px;font-weight:700;cursor:pointer;transition:var(--ease)}
    .button.primary{background:linear-gradient(110deg,#55d9f7,#7089ff);color:#071021;box-shadow:0 8px 24px rgba(83,192,255,.23)}
    .button.primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(83,192,255,.36)}
    .button.ghost{border-color:var(--line);background:rgba(17,30,56,.6);color:var(--text)}
    .button.ghost:hover{border-color:var(--line-bright);background:rgba(55,90,151,.25)}
    .button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid rgba(97,220,255,.55);outline-offset:3px}
    .menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);padding:7px 10px;border-radius:9px}
    .page-hero{padding:76px 0 58px;border-bottom:1px solid var(--line);position:relative}
    .page-hero-grid{display:grid;grid-template-columns:1fr .8fr;gap:60px;align-items:end}
    .eyebrow,.section-kicker{color:var(--cyan);font-size:12px;letter-spacing:.16em;font-weight:800}
    h1,h2,h3{margin-top:0;line-height:1.25;letter-spacing:-.045em}
    h1{font-size:clamp(36px,5vw,62px);margin:14px 0 20px}
    h2{font-size:clamp(27px,3vw,39px);margin-bottom:14px}
    h3{font-size:19px;margin-bottom:9px}
    .lead{color:var(--muted);font-size:18px;max-width:680px;margin:0}
    .hero-note{padding:22px;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(145deg,rgba(27,49,84,.82),rgba(12,23,46,.78));box-shadow:var(--shadow)}
    .note-line{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:14px}
    .note-line:last-child{margin-bottom:0}
    .status-dot{width:9px;height:9px;border-radius:50%;background:var(--green);box-shadow:0 0 13px var(--green);flex:none}
    section{padding:72px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-head p{max-width:570px;color:var(--muted);margin:0}
    .index-bar{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0 32px}
    .tag{display:inline-flex;padding:6px 12px;border:1px solid var(--line);border-radius:999px;color:#b6d9f2;background:rgba(97,220,255,.06);font-size:12px}
    .tag:hover,.tag.current{border-color:var(--line-bright);color:var(--text);background:rgba(97,220,255,.13)}
    .discovery-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:22px;align-items:start}
    .discover-card,.side-panel,.timeline-item,.rule-card,.faq-list,.cta-panel{border:1px solid var(--line);background:var(--panel);border-radius:var(--radius-md);box-shadow:0 16px 42px rgba(0,0,0,.16)}
    .discover-card{display:grid;grid-template-columns:245px 1fr;min-height:205px;overflow:hidden;margin-bottom:16px;transition:var(--ease)}
    .discover-card:hover{transform:translateY(-4px);border-color:var(--line-bright);box-shadow:var(--shadow)}
    .cover{min-height:205px;position:relative;overflow:hidden;background:linear-gradient(135deg,#173c62,#30316b 48%,#171d43)}
    .cover::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 25%,rgba(97,220,255,.5),transparent 28%),linear-gradient(150deg,transparent 20%,rgba(4,9,22,.82))}
    .cover::after{content:"适龄预览";position:absolute;left:16px;bottom:16px;padding:4px 9px;border:1px solid rgba(255,255,255,.2);border-radius:999px;color:#dce8fa;background:rgba(5,12,27,.48);font-size:11px}
    .cover.alt{background:linear-gradient(135deg,#392354,#1c3971 52%,#101932)}
    .cover.mint{background:linear-gradient(135deg,#153d4d,#254d70 50%,#161d46)}
    .discover-body{padding:24px 25px}
    .card-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;color:var(--dim);font-size:12px;margin-bottom:10px}
    .badge{padding:4px 9px;color:#cbefff;border:1px solid rgba(97,220,255,.32);border-radius:999px;background:rgba(97,220,255,.08)}
    .discover-body p{margin:0 0 15px;color:var(--muted);font-size:14px}
    .text-link{color:var(--cyan);font-weight:700;font-size:14px}
    .text-link:hover{color:#fff}
    .side-panel{padding:25px;position:sticky;top:100px;background:linear-gradient(160deg,rgba(27,48,83,.86),rgba(13,25,49,.74))}
    .side-panel p{color:var(--muted);font-size:14px}
    .side-list{list-style:none;margin:20px 0 0;padding:0}
    .side-list li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:14px}
    .side-list li:last-child{border:0}
    .side-list strong{color:var(--text);font-weight:600}
    .timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .timeline-item{padding:22px;position:relative;min-height:170px;transition:var(--ease)}
    .timeline-item:hover{border-color:var(--line-bright);transform:translateY(-3px)}
    .timeline-item::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan);display:block;margin-bottom:20px}
    .timeline-item time{display:block;color:var(--dim);font-size:12px;margin-bottom:8px}
    .timeline-item p,.rule-card p{color:var(--muted);font-size:14px;margin:0}
    .rules{background:rgba(10,20,39,.62)}
    .rule-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .rule-card{padding:24px;background:rgba(18,31,57,.55)}
    .rule-card h3{color:#dceaff}
    .cta-panel{padding:34px 38px;display:flex;justify-content:space-between;align-items:center;gap:26px;background:linear-gradient(120deg,rgba(23,57,91,.92),rgba(45,35,89,.76));border-color:rgba(97,220,255,.3);box-shadow:var(--glow)}
    .cta-panel p{color:var(--muted);margin:0;max-width:620px}
    .faq-list{overflow:hidden}
    details{border-bottom:1px solid var(--line);padding:0 24px}
    details:last-child{border-bottom:0}
    summary{list-style:none;cursor:pointer;padding:21px 28px 21px 0;font-weight:700;position:relative}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"＋";position:absolute;right:0;color:var(--cyan);font-size:20px}
    details[open] summary::after{content:"－"}
    details p{color:var(--muted);font-size:14px;margin:-5px 0 22px;max-width:820px}
    .site-footer{padding:54px 0 22px;background:#060b17;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
    .footer-copy{color:var(--muted);font-size:13px;max-width:310px;margin:16px 0 0}
    .footer-title{font-size:13px;color:var(--text);font-weight:800;margin-bottom:12px}
    .footer-links{list-style:none;padding:0;margin:0}
    .footer-links li{color:var(--muted);font-size:13px;margin:8px 0}
    .footer-links a:hover{color:var(--cyan)}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:38px;padding-top:18px;color:var(--dim);font-size:12px}
    .notice{max-width:620px;text-align:right}
    @media(max-width:900px){
      .page-hero-grid,.discovery-layout{grid-template-columns:1fr}
      .side-panel{position:static}
      .timeline{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:2}
    }
    @media(max-width:700px){
      .container{width:min(100% - 32px,1200px)}
      .nav-shell{min-height:68px;position:relative}
      .menu-toggle{display:block;margin-left:auto}
      .main-nav{display:none;position:absolute;left:0;right:0;top:68px;padding:12px;background:rgba(9,18,36,.98);border:1px solid var(--line);border-radius:0 0 16px 16px;flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 14px}
      .nav-actions{display:none}
      .brand-name{font-size:15px}
      .page-hero{padding:54px 0 42px}
      .lead{font-size:16px}
      section{padding:54px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .discover-card{grid-template-columns:1fr}
      .cover{min-height:155px}
      .discover-body{padding:20px}
      .timeline,.rule-grid{grid-template-columns:1fr}
      .cta-panel{display:block;padding:27px 24px}
      .cta-panel .button{margin-top:20px;width:100%}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
      .footer-grid>div:last-child{grid-column:auto}
      .footer-bottom{display:block}
      .notice{text-align:left;margin-top:10px}
    }
    @media(max-width:460px){
      .footer-grid{grid-template-columns:1fr}
      .discover-body h3{font-size:18px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;transition:none!important}
    }

/* roulang page: category1 */
:root{
 --bg:#070d1b;--bg-soft:#0b1428;--panel:rgba(18,31,57,.74);--panel-strong:#101e38;
 --line:rgba(145,181,239,.18);--line-bright:rgba(91,211,255,.45);--text:#eef5ff;
 --muted:#9aacc9;--dim:#6e81a2;--cyan:#61dcff;--blue:#6b8cff;--violet:#9a78ff;
 --rose:#d985c7;--radius-lg:26px;--radius-md:18px;--radius-sm:12px;
 --shadow:0 24px 70px rgba(0,0,0,.35);--glow:0 0 28px rgba(97,220,255,.2);
 --ease:all .28s ease;
}
*,:before,:after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(circle at 78% 8%,rgba(82,95,220,.18),transparent 28rem),radial-gradient(circle at 8% 35%,rgba(36,156,204,.1),transparent 25rem),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.2;background-image:linear-gradient(rgba(130,170,235,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(130,170,235,.045) 1px,transparent 1px);background-size:54px 54px;mask-image:linear-gradient(to bottom,#000,transparent 72%)}
a{color:inherit;text-decoration:none;transition:var(--ease)}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
.container{width:min(1200px,calc(100% - 48px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(7,13,27,.86);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav-shell{min-height:76px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
.brand-mark{width:34px;height:34px;border-radius:11px;background:linear-gradient(145deg,var(--cyan),var(--blue) 55%,var(--violet));box-shadow:var(--glow);position:relative}
.brand-mark:after{content:"";position:absolute;width:10px;height:10px;border:2px solid #071021;border-radius:50%;left:12px;top:9px}
.brand-name{font-size:17px}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.main-nav a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px}
.main-nav a:hover,.main-nav a:focus,.main-nav a.active{color:var(--text);background:rgba(97,220,255,.09)}
.nav-actions{display:flex;gap:9px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:43px;padding:0 18px;border-radius:12px;border:1px solid transparent;font-size:14px;font-weight:700;cursor:pointer;transition:var(--ease)}
.button.primary{background:linear-gradient(110deg,#55d9f7,#7089ff);color:#071021;box-shadow:0 8px 24px rgba(83,192,255,.23)}
.button.primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(83,192,255,.36)}
.button.ghost{border-color:var(--line);background:rgba(17,30,56,.6);color:var(--text)}
.button.ghost:hover{border-color:var(--line-bright);background:rgba(55,90,151,.25)}
.button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid rgba(97,220,255,.55);outline-offset:3px}
.menu-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);padding:7px 10px;border-radius:9px}
.hero{padding:52px 0 38px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
.eyebrow,.section-kicker{color:var(--cyan);font-size:12px;letter-spacing:.16em;font-weight:800}
h1,h2,h3{line-height:1.25;letter-spacing:-.045em;margin:0 0 16px}
h1{font-size:clamp(34px,5vw,58px);max-width:720px}
h2{font-size:clamp(27px,3vw,38px)}
h3{font-size:20px}
.hero-copy{font-size:17px;color:var(--muted);max-width:680px;margin:0}
.hero-actions{display:flex;gap:12px;margin:26px 0 18px;flex-wrap:wrap}
.age-note{display:flex;gap:10px;align-items:flex-start;color:var(--dim);font-size:13px;max-width:620px}
.age-note strong{color:#c5d7f3;font-weight:600}
.hero-index{padding:24px;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(145deg,rgba(26,46,82,.82),rgba(9,18,38,.82));box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero-index:before{content:"";position:absolute;width:210px;height:210px;border-radius:50%;background:rgba(97,220,255,.16);filter:blur(50px);right:-70px;top:-85px}
.index-head,.stage-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px;color:var(--muted);font-size:12px;position:relative}
.stage-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);margin-right:7px}
.index-list{margin:18px 0 0;padding:0;list-style:none;position:relative}
.index-list li{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-bottom:1px solid rgba(145,181,239,.11);font-size:14px}
.index-list li:last-child{border:0}
.index-list a:hover{color:var(--cyan)}
.index-no{color:var(--dim);font-size:12px;margin-right:12px}
.index-state{color:var(--cyan);font-size:12px}
section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
.section-head p{max-width:580px;color:var(--muted);margin:0}
.filter-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:16px;border:1px solid var(--line);border-radius:var(--radius-md);background:rgba(12,24,47,.72);margin-bottom:28px}
.filter-label{color:var(--dim);font-size:13px;margin-right:4px}
.tag{display:inline-flex;padding:5px 11px;border:1px solid var(--line);border-radius:999px;color:#b6d9f2;background:rgba(97,220,255,.06);font-size:12px;transition:var(--ease)}
.tag:hover,.tag.active{border-color:var(--line-bright);color:var(--text);background:rgba(97,220,255,.13)}
.tag.hot{border-color:rgba(154,120,255,.5);color:#d2c4ff}
.theme-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:24px;align-items:start}
.content-card{display:grid;grid-template-columns:190px 1fr;gap:21px;padding:14px;border:1px solid var(--line);background:var(--panel);border-radius:var(--radius-md);margin-bottom:14px;transition:var(--ease)}
.content-card:hover{transform:translateY(-4px);border-color:var(--line-bright);box-shadow:0 15px 38px rgba(0,0,0,.22)}
.cover{min-height:158px;border-radius:12px;position:relative;overflow:hidden;background:linear-gradient(145deg,#17365b,#263269 48%,#14172f)}
.cover:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 70% 22%,rgba(97,220,255,.45),transparent 24%),linear-gradient(135deg,transparent 38%,rgba(217,133,199,.3));filter:blur(1px)}
.cover:after{content:"适龄内容";position:absolute;left:12px;bottom:12px;padding:3px 8px;border:1px solid rgba(255,255,255,.25);border-radius:999px;background:rgba(3,8,20,.55);font-size:11px;color:#d6e5fa}
.content-card p{color:var(--muted);font-size:14px;margin:0 0 11px}
.meta{color:var(--dim);font-size:12px;display:flex;gap:12px;flex-wrap:wrap}
.card-link{display:inline-block;color:var(--cyan);font-size:13px;margin-top:13px}
.card-link:hover{color:#fff}
.side-panel,.info-panel{padding:24px;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(145deg,rgba(25,47,82,.75),rgba(13,23,47,.8));box-shadow:var(--shadow)}
.side-panel h3{font-size:19px}
.side-copy{color:var(--muted);font-size:14px}
.rank-list{list-style:none;padding:0;margin:17px 0 0}
.rank-item{display:grid;grid-template-columns:30px 1fr auto;gap:10px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
.rank-item:last-child{border-bottom:0}
.rank-number{color:var(--cyan);font-weight:800}
.rank-title{font-size:14px}
.rank-arrow{color:var(--dim)}
.feature-strip{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
.feature-panel{padding:30px;min-height:250px;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(135deg,rgba(25,54,91,.9),rgba(16,27,55,.75));position:relative;overflow:hidden}
.feature-panel:after{content:"精选";position:absolute;right:25px;top:20px;color:rgba(97,220,255,.25);font-size:58px;font-weight:900}
.feature-panel p,.mini-panel p{color:var(--muted);max-width:570px}
.mini-stack{display:grid;gap:14px}
.mini-panel{padding:21px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--panel);transition:var(--ease)}
.mini-panel:hover{transform:translateY(-4px);border-color:var(--line-bright)}
.mini-panel h3{font-size:18px;margin-bottom:7px}
.empty-box{padding:23px;border:1px dashed var(--line-bright);border-radius:var(--radius-md);color:var(--muted);background:rgba(10,20,39,.5);font-size:14px}
.faq-list{max-width:900px;margin:0 auto;border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line);background:rgba(12,24,47,.3)}
summary{list-style:none;cursor:pointer;padding:20px 50px 20px 3px;position:relative;font-weight:700}
summary::-webkit-details-marker{display:none}
summary:after{content:"＋";position:absolute;right:6px;color:var(--cyan);font-size:22px;top:17px}
details[open] summary:after{content:"－"}
.answer{color:var(--muted);padding:0 42px 20px 3px;font-size:14px}
.cta-band{padding:36px 42px;border:1px solid rgba(97,220,255,.34);border-radius:var(--radius-lg);background:linear-gradient(120deg,rgba(28,64,100,.88),rgba(39,30,82,.78));box-shadow:var(--glow);display:flex;justify-content:space-between;align-items:center;gap:25px}
.cta-band p{color:#c1d0e8;margin:0;max-width:630px}
.site-footer{border-top:1px solid var(--line);background:rgba(5,11,24,.86);padding:52px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}
.footer-copy{color:var(--muted);font-size:13px;max-width:310px;margin:18px 0 0}
.footer-title{font-size:13px;font-weight:800;color:var(--text);margin-bottom:13px}
.footer-links{list-style:none;margin:0;padding:0;color:var(--muted);font-size:13px}
.footer-links li{margin:8px 0}
.footer-links a:hover{color:var(--cyan)}
.footer-bottom{border-top:1px solid var(--line);margin-top:38px;padding-top:19px;display:flex;justify-content:space-between;gap:20px;color:var(--dim);font-size:12px}
.notice{max-width:680px;text-align:right}
@media(max-width:900px){
 .nav-shell{gap:15px}.main-nav{margin-left:auto}.nav-actions .ghost{display:none}
 .hero-grid,.feature-strip{grid-template-columns:1fr}.hero{padding-top:42px}
 .theme-layout{grid-template-columns:1fr}.side-panel{order:-1}
 .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
}
@media(max-width:680px){
 .container{width:min(100% - 30px,1200px)}.menu-toggle{display:block;margin-left:auto}
 .main-nav{display:none;position:absolute;top:76px;left:15px;right:15px;padding:12px;flex-direction:column;align-items:stretch;background:#0b162d;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
 .main-nav.open{display:flex}.main-nav a{padding:12px 14px}.nav-actions{display:none}
 .hero{padding:38px 0 28px}h1{font-size:36px}.hero-copy{font-size:16px}
 section{padding:52px 0}.section-head{display:block}.section-head p{margin-top:10px}
 .filter-bar{align-items:flex-start}.content-card{grid-template-columns:105px 1fr;gap:13px;padding:10px}.cover{min-height:135px}.content-card h3{font-size:17px}
 .feature-panel{padding:23px;min-height:220px}.cta-band{padding:25px;display:block}.cta-band .button{margin-top:20px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}
 .footer-bottom{display:block}.notice{text-align:left;margin-top:10px}
}
@media(max-width:420px){.brand-name{font-size:15px}.hero-actions .button{width:100%}.content-card{grid-template-columns:1fr}.cover{min-height:145px}.footer-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}