/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-dark:#1d4ed8;
      --primary-soft:#dbeafe;
      --sky:#38bdf8;
      --accent:#f59e0b;
      --bg:#f8fafc;
      --bg-soft:#f1f5f9;
      --surface:#ffffff;
      --text:#0f172a;
      --muted:#475569;
      --weak:#94a3b8;
      --border:#e2e8f0;
      --border-blue:#bfdbfe;
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --shadow-sm:0 10px 28px rgba(15,23,42,.06);
      --shadow-md:0 20px 50px rgba(15,23,42,.10);
      --shadow-blue:0 18px 45px rgba(37,99,235,.16);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(56,189,248,.16), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(37,99,235,.12), transparent 30%),
        linear-gradient(180deg,#ffffff 0%,var(--bg) 38%,#ffffff 100%);
      line-height:1.75;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    :focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .site-container{width:min(1240px,calc(100% - 32px));margin-inline:auto}
    .section{padding:86px 0}
    .section-tight{padding:64px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
    .section-kicker{
      display:inline-flex;align-items:center;gap:8px;
      font-size:13px;font-weight:700;color:var(--primary);
      background:rgba(219,234,254,.72);border:1px solid var(--border-blue);
      border-radius:999px;padding:7px 12px;margin-bottom:12px;
    }
    .section-title{font-size:clamp(28px,3.3vw,42px);line-height:1.18;font-weight:800;letter-spacing:-.03em}
    .section-desc{max-width:720px;color:var(--muted);font-size:16px}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:saturate(180%) blur(16px);
      border-bottom:1px solid rgba(226,232,240,.9);
    }
    .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand-icon{
      width:42px;height:42px;border-radius:15px;
      display:grid;place-items:center;color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--sky));
      box-shadow:var(--shadow-blue);
      flex:0 0 auto;
    }
    .brand-icon svg{width:22px;height:22px}
    .brand-text{font-weight:850;font-size:17px;letter-spacing:-.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:360px}
    .nav-links{display:flex;align-items:center;gap:8px}
    .nav-link{
      padding:10px 14px;border-radius:999px;color:var(--muted);
      font-weight:700;font-size:14px;transition:.22s ease;
    }
    .nav-link:hover{color:var(--primary);background:var(--primary-soft);transform:translateY(-1px)}
    .nav-link.active{color:var(--primary);background:var(--primary-soft)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .search{
      width:230px;height:42px;border:1px solid var(--border);
      background:#f8fafc;border-radius:999px;padding:0 15px;color:var(--text);
      transition:.2s ease;
    }
    .search::placeholder{color:var(--weak)}
    .search:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:44px;padding:0 18px;border-radius:999px;
      border:1px solid transparent;font-weight:800;font-size:14px;
      transition:.22s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-blue)}
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 22px 52px rgba(37,99,235,.22)}
    .btn-secondary{background:#fff;color:var(--primary);border-color:var(--border-blue);box-shadow:var(--shadow-sm)}
    .btn-secondary:hover{background:#eff6ff;transform:translateY(-2px);border-color:#93c5fd}
    .mobile-toggle{display:none}
    .mobile-menu{display:none}
    .hero{
      position:relative;overflow:hidden;
      padding:82px 0 62px;
      border-bottom:1px solid rgba(226,232,240,.72);
    }
    .hero:before{
      content:"";position:absolute;inset:0;pointer-events:none;
      background-image:linear-gradient(rgba(37,99,235,.045) 1px, transparent 1px),linear-gradient(90deg, rgba(37,99,235,.045) 1px, transparent 1px);
      background-size:38px 38px;
      mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
    }
    .hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.03fr) minmax(420px,.97fr);gap:58px;align-items:center}
    .hero h1{
      font-size:clamp(34px,5.7vw,68px);line-height:1.06;
      font-weight:900;letter-spacing:-.055em;margin:0 0 22px;
    }
    .hero-lead{font-size:18px;color:var(--muted);max-width:720px;margin-bottom:26px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
    .hero-badges{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;max-width:680px}
    .metric{
      background:rgba(255,255,255,.76);border:1px solid rgba(191,219,254,.78);
      border-radius:18px;padding:14px 16px;box-shadow:var(--shadow-sm)
    }
    .metric strong{display:block;font-size:22px;line-height:1.1;color:var(--primary);font-weight:900}
    .metric span{font-size:13px;color:var(--muted);font-weight:650}
    .poster-stage{
      min-height:520px;position:relative;border-radius:34px;
      background:linear-gradient(145deg,#eff6ff 0%,#ffffff 48%,#e0f2fe 100%);
      border:1px solid rgba(191,219,254,.95);box-shadow:var(--shadow-md);
      overflow:hidden;padding:26px;
    }
    .poster-stage:after{
      content:"";position:absolute;inset:auto -80px -95px auto;width:260px;height:260px;border-radius:50%;
      background:rgba(56,189,248,.22);filter:blur(5px)
    }
    .screen-card{
      position:absolute;left:38px;right:38px;top:36px;border-radius:28px;
      background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-md);overflow:hidden;
    }
    .screen-cover{
      height:210px;background:
        linear-gradient(135deg,rgba(37,99,235,.92),rgba(56,189,248,.62)),
        radial-gradient(circle at 25% 30%,rgba(255,255,255,.50),transparent 32%);
      position:relative;
    }
    .play{
      width:64px;height:64px;border-radius:50%;display:grid;place-items:center;
      background:rgba(255,255,255,.92);color:var(--primary);
      position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
      box-shadow:0 18px 40px rgba(15,23,42,.14)
    }
    .poster-info{padding:18px 20px 20px}
    .poster-line{height:10px;border-radius:999px;background:#e2e8f0;margin:10px 0}
    .poster-line.short{width:58%}
    .floating-card{
      position:absolute;background:#fff;border:1px solid var(--border-blue);border-radius:22px;
      box-shadow:var(--shadow-md);padding:14px;transition:.25s ease;
    }
    .floating-card:hover{transform:translateY(-4px)}
    .float-a{width:176px;left:22px;bottom:34px}
    .float-b{width:205px;right:22px;bottom:78px}
    .float-c{width:150px;right:38px;top:246px}
    .mini-cover{height:92px;border-radius:16px;background:linear-gradient(135deg,#dbeafe,#bae6fd);margin-bottom:10px;position:relative;overflow:hidden}
    .mini-cover:before{content:"";position:absolute;inset:16px 24px;border:2px solid rgba(37,99,235,.22);border-radius:14px}
    .tag,.badge{
      display:inline-flex;align-items:center;gap:6px;border-radius:999px;font-size:12px;font-weight:800;
      padding:6px 10px;background:#eff6ff;color:var(--primary);border:1px solid var(--border-blue);
    }
    .tag.orange{background:#fff7ed;color:#c2410c;border-color:#fed7aa}
    .library-scroll{position:relative}
    .rail{
      display:flex;gap:18px;overflow-x:auto;padding:4px 4px 24px;scroll-snap-type:x mandatory;
      scrollbar-width:thin;scrollbar-color:#bfdbfe transparent;
    }
    .rail::-webkit-scrollbar{height:8px}
    .rail::-webkit-scrollbar-track{background:transparent}
    .rail::-webkit-scrollbar-thumb{background:#bfdbfe;border-radius:999px}
    .library-card{
      flex:0 0 232px;scroll-snap-align:start;background:#fff;border:1px solid var(--border);
      border-radius:24px;overflow:hidden;box-shadow:var(--shadow-sm);transition:.24s ease;
    }
    .library-card:hover{transform:translateY(-4px);border-color:#93c5fd;box-shadow:var(--shadow-md)}
    .cover{
      position:relative;aspect-ratio:3/4;overflow:hidden;background:linear-gradient(145deg,#dbeafe,#f8fafc 55%,#bae6fd);
    }
    .cover:after{
      content:"";position:absolute;inset:14px;border-radius:18px;border:1px dashed rgba(37,99,235,.22);
      background:linear-gradient(180deg,rgba(255,255,255,.28),transparent);
    }
    .cover .play-small{
      position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.82);
      width:48px;height:48px;border-radius:50%;background:#fff;color:var(--primary);
      display:grid;place-items:center;opacity:0;transition:.24s ease;box-shadow:var(--shadow-sm);z-index:2;
    }
    .library-card:hover .play-small{opacity:1;transform:translate(-50%,-50%) scale(1)}
    .library-card:hover .cover{filter:saturate(1.06)}
    .card-body{padding:15px}
    .card-title{font-weight:850;line-height:1.35;margin:10px 0 4px}
    .card-meta{font-size:13px;color:var(--weak)}
    .feature-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:24px}
    .wide-card,.side-card,.content-card,.proof-card,.faq-item,.cta-box{
      background:#fff;border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);
    }
    .wide-card{overflow:hidden;display:grid;grid-template-columns:1fr .88fr;min-height:430px}
    .wide-visual{
      background:linear-gradient(135deg,#2563eb,#38bdf8);
      position:relative;overflow:hidden;min-height:320px;
    }
    .wide-visual:before{content:"";position:absolute;inset:32px;border-radius:28px;border:1px solid rgba(255,255,255,.42)}
    .wide-visual:after{content:"";position:absolute;width:210px;height:210px;border-radius:50%;background:rgba(255,255,255,.20);right:-50px;bottom:-45px}
    .wide-content{padding:34px;display:flex;flex-direction:column;justify-content:center}
    .rank-list{display:grid;gap:14px}
    .rank-item{
      display:flex;gap:14px;align-items:center;padding:16px;border:1px solid var(--border);
      border-radius:20px;background:#fff;transition:.22s ease;box-shadow:var(--shadow-sm);
    }
    .rank-item:hover{transform:translateY(-3px);border-color:#93c5fd;box-shadow:var(--shadow-md)}
    .rank-no{font-size:18px;font-weight:950;color:var(--primary);width:42px;height:42px;display:grid;place-items:center;background:#eff6ff;border-radius:14px;flex:0 0 auto}
    .grid-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
    .content-card{padding:20px;transition:.24s ease}
    .content-card:hover{transform:translateY(-4px);border-color:#93c5fd;box-shadow:var(--shadow-md)}
    .icon-box{
      width:48px;height:48px;border-radius:17px;
      display:grid;place-items:center;background:linear-gradient(135deg,#eff6ff,#e0f2fe);
      color:var(--primary);margin-bottom:16px;
    }
    .topic-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
    .topic-wide{
      min-height:260px;border-radius:28px;border:1px solid var(--border-blue);
      background:linear-gradient(135deg,#fff,#eff6ff);padding:24px;box-shadow:var(--shadow-sm);
      display:flex;flex-direction:column;justify-content:space-between;transition:.24s ease;
    }
    .topic-wide:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#93c5fd}
    .update-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .update-item{
      display:flex;justify-content:space-between;gap:16px;align-items:center;background:#fff;border:1px solid var(--border);
      border-radius:20px;padding:18px;box-shadow:var(--shadow-sm);transition:.22s ease;
    }
    .update-item:hover{border-color:#93c5fd;transform:translateY(-2px)}
    .proof-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
    .proof-card{padding:22px}
    .proof-card strong{display:block;font-size:28px;color:var(--primary);font-weight:950;line-height:1.1;margin-bottom:8px}
    .faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
    .faq-item{padding:22px;transition:.22s ease}
    .faq-item:hover{border-color:#93c5fd;background:#f8fbff}
    .faq-item h3{font-size:18px;font-weight:850;margin-bottom:8px}
    .faq-item p{color:var(--muted);margin:0}
    .cta-box{
      position:relative;overflow:hidden;padding:44px;
      background:linear-gradient(135deg,#eff6ff 0%,#ffffff 58%,#e0f2fe 100%);
      display:grid;grid-template-columns:1fr auto;gap:26px;align-items:center;
    }
    .cta-box:after{
      content:"";position:absolute;right:60px;top:-80px;width:180px;height:180px;border-radius:50%;
      background:rgba(56,189,248,.20);
    }
    .site-footer{border-top:1px solid var(--border);background:#fff;padding:54px 0 28px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .7fr .9fr;gap:28px;align-items:start}
    .footer-title{font-weight:900;margin-bottom:12px}
    .footer-links{display:grid;gap:10px}
    .footer-links a{color:var(--muted);font-weight:650;transition:.2s ease}
    .footer-links a:hover{color:var(--primary);transform:translateX(2px)}
    .copyright{border-top:1px solid var(--border);margin-top:34px;padding-top:20px;color:var(--weak);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
    @media (max-width:1100px){
      .nav-links,.nav-actions{display:none}
      .mobile-toggle{
        display:inline-flex;width:44px;height:44px;border-radius:14px;border:1px solid var(--border);
        align-items:center;justify-content:center;background:#fff;color:var(--text)
      }
      .mobile-menu{
        display:none;padding:0 0 18px;border-top:1px solid var(--border);
      }
      #menu-check:checked ~ .mobile-menu{display:block}
      .mobile-menu-inner{display:grid;gap:10px;padding-top:16px}
      .mobile-menu .search{width:100%}
      .hero-grid{grid-template-columns:1fr;gap:34px}
      .poster-stage{min-height:440px}
      .feature-grid,.wide-card{grid-template-columns:1fr}
      .grid-cards,.proof-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .topic-row{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px,1240px)}
      .section{padding:62px 0}
      .section-head{display:block}
      .hero{padding:54px 0 48px}
      .hero-badges{grid-template-columns:1fr}
      .poster-stage{min-height:380px;padding:18px;border-radius:26px}
      .screen-card{left:18px;right:18px;top:20px}
      .screen-cover{height:170px}
      .float-a{left:18px;bottom:18px;width:150px}
      .float-b{right:18px;bottom:42px;width:168px}
      .float-c{display:none}
      .library-card{flex-basis:204px}
      .grid-cards,.update-list,.proof-grid,.faq-grid{grid-template-columns:1fr}
      .cta-box{grid-template-columns:1fr;padding:28px}
      .footer-grid{grid-template-columns:1fr}
      .brand-text{max-width:230px}
      .wide-content{padding:24px}
    }
    @media (max-width:520px){
      .nav-wrap{height:68px}
      .brand-icon{width:38px;height:38px;border-radius:13px}
      .brand-text{font-size:15px;max-width:190px}
      .hero-actions .btn{width:100%}
      .poster-stage{min-height:340px}
      .screen-cover{height:142px}
      .float-b{display:none}
      .metric{padding:12px}
      .rail{gap:14px}
      .library-card{flex-basis:186px}
      .section-title{font-size:28px}
    }

/* roulang page: category1 */
:root{
      --primary:#2563eb;
      --primary-700:#1d4ed8;
      --primary-soft:#dbeafe;
      --sky:#38bdf8;
      --accent:#f59e0b;
      --bg:#f8fafc;
      --bg-soft:#f1f5f9;
      --text:#0f172a;
      --muted:#475569;
      --weak:#94a3b8;
      --border:#e2e8f0;
      --border-blue:#bfdbfe;
      --card:#ffffff;
      --radius-lg:28px;
      --radius-md:20px;
      --radius-sm:14px;
      --shadow-sm:0 10px 30px rgba(15,23,42,.06);
      --shadow-md:0 18px 48px rgba(15,23,42,.10);
      --shadow-blue:0 16px 44px rgba(37,99,235,.16);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 8% 8%, rgba(56,189,248,.18), transparent 30%),
        linear-gradient(180deg,#ffffff 0%,var(--bg) 42%,#ffffff 100%);
      line-height:1.75;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer}
    ::selection{background:var(--primary-soft);color:var(--primary-700)}
    :focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px;border-radius:12px}
    .site-container{width:min(1180px,calc(100% - 32px));margin-inline:auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:saturate(160%) blur(18px);
      border-bottom:1px solid rgba(226,232,240,.9);
      box-shadow:0 8px 24px rgba(15,23,42,.035);
    }
    .header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
    .brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
    .brand-icon{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--sky));
      box-shadow:var(--shadow-blue);
      flex:0 0 auto;
    }
    .brand-icon svg{width:25px;height:25px}
    .brand-text{
      font-weight:800;
      letter-spacing:-.02em;
      color:#0f172a;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:330px;
    }
    .nav-links{display:flex;align-items:center;gap:8px}
    .nav-link{
      position:relative;
      padding:9px 15px;
      border-radius:999px;
      color:var(--muted);
      font-weight:650;
      font-size:15px;
      transition:background .2s ease,color .2s ease,transform .2s ease;
    }
    .nav-link:hover{background:#eff6ff;color:var(--primary);transform:translateY(-1px)}
    .nav-link.active{background:var(--primary-soft);color:var(--primary-700)}
    .header-actions{display:flex;align-items:center;gap:12px}
    .search-pill{
      display:flex;align-items:center;gap:8px;
      height:42px;width:218px;
      padding:0 14px;
      background:#f8fafc;
      border:1px solid var(--border);
      border-radius:999px;
      transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
    }
    .search-pill:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.10);background:#fff}
    .search-pill input{width:100%;border:0;outline:0;background:transparent;color:var(--text);font-size:14px}
    .search-pill input::placeholder{color:#94a3b8}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:44px;padding:0 19px;
      border-radius:999px;border:1px solid transparent;
      font-weight:750;font-size:15px;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
      user-select:none;
    }
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 28px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--primary-700);transform:translateY(-2px);box-shadow:0 18px 38px rgba(37,99,235,.28)}
    .btn-secondary{background:#fff;color:var(--primary-700);border-color:var(--border-blue);box-shadow:var(--shadow-sm)}
    .btn-secondary:hover{background:#eff6ff;transform:translateY(-2px);border-color:#93c5fd}
    .btn-ghost{background:#f8fafc;color:var(--muted);border-color:var(--border)}
    .btn-ghost:hover{background:#eef6ff;color:var(--primary-700);border-color:var(--border-blue)}
    .menu-btn{
      display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:14px;
      background:#fff;color:var(--text);align-items:center;justify-content:center;
      transition:background .2s ease,border-color .2s ease,transform .2s ease;
    }
    .menu-btn:hover{background:#eff6ff;border-color:var(--border-blue);transform:translateY(-1px)}
    .mobile-panel{display:none;border-top:1px solid var(--border);padding:14px 0 18px;background:#fff}
    .mobile-panel.open{display:block}
    .page-hero{
      position:relative;
      padding:64px 0 38px;
      overflow:hidden;
      background:
        linear-gradient(135deg,rgba(219,234,254,.86),rgba(255,255,255,.9) 52%,rgba(240,249,255,.86)),
        radial-gradient(circle at 90% 10%,rgba(56,189,248,.28),transparent 28%);
      border-bottom:1px solid rgba(191,219,254,.7);
    }
    .page-hero:before{
      content:"";position:absolute;inset:0;
      background-image:linear-gradient(rgba(37,99,235,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.055) 1px,transparent 1px);
      background-size:28px 28px;
      mask-image:linear-gradient(90deg,transparent,black 18%,black 82%,transparent);
      pointer-events:none;
    }
    .hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.18fr) minmax(330px,.82fr);gap:38px;align-items:center}
    .breadcrumb{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:14px;margin-bottom:18px;flex-wrap:wrap}
    .breadcrumb a{color:var(--primary-700);font-weight:650}
    .breadcrumb span{color:#64748b}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      background:#fff;border:1px solid var(--border-blue);
      color:var(--primary-700);font-weight:750;font-size:13px;
      box-shadow:var(--shadow-sm);
    }
    .hero-title{
      margin:18px 0 18px;
      font-size:clamp(34px,5vw,58px);
      line-height:1.08;
      letter-spacing:-.045em;
      font-weight:850;
    }
    .hero-title span{color:var(--primary)}
    .hero-desc{max-width:720px;color:var(--muted);font-size:17px;line-height:1.9}
    .hero-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
    .filter-visual{
      position:relative;
      min-height:310px;
      border-radius:32px;
      background:rgba(255,255,255,.78);
      border:1px solid rgba(191,219,254,.9);
      box-shadow:var(--shadow-md);
      padding:22px;
      overflow:hidden;
    }
    .filter-visual:before{
      content:"";position:absolute;width:180px;height:180px;border-radius:999px;
      background:rgba(56,189,248,.18);right:-54px;top:-58px;
    }
    .visual-top{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
    .visual-card{
      position:relative;background:#fff;border:1px solid var(--border);
      border-radius:22px;padding:15px;box-shadow:var(--shadow-sm);
      margin-top:12px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
    }
    .visual-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--border-blue)}
    .bars{display:grid;gap:8px;margin-top:10px}
    .bar{height:9px;border-radius:999px;background:#e2e8f0;overflow:hidden}
    .bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--sky))}
    .section{padding:76px 0}
    .section-tight{padding:52px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
    .section-title{font-size:clamp(28px,3.6vw,40px);line-height:1.18;font-weight:820;letter-spacing:-.035em}
    .section-desc{color:var(--muted);max-width:650px;margin-top:10px;font-size:16px}
    .filter-bar-wrap{
      position:sticky;top:76px;z-index:20;
      background:rgba(248,250,252,.88);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(226,232,240,.9);
    }
    .filter-bar{
      display:flex;gap:10px;overflow-x:auto;padding:16px 0;
      scrollbar-width:none;
    }
    .filter-bar::-webkit-scrollbar{display:none}
    .filter-chip{
      flex:0 0 auto;
      border:1px solid var(--border);
      border-radius:999px;
      padding:9px 15px;
      background:#fff;
      color:var(--muted);
      font-size:14px;
      font-weight:750;
      transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    }
    .filter-chip:hover{background:#eff6ff;color:var(--primary-700);border-color:var(--border-blue);transform:translateY(-1px)}
    .filter-chip.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 12px 26px rgba(37,99,235,.2)}
    .content-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
    .library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
    .content-card{
      background:#fff;border:1px solid var(--border);
      border-radius:24px;overflow:hidden;box-shadow:var(--shadow-sm);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
      min-height:100%;
      display:flex;flex-direction:column;
    }
    .content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--border-blue)}
    .cover{
      position:relative;aspect-ratio:16/10;overflow:hidden;
      background:linear-gradient(135deg,#dbeafe,#ffffff 45%,#bae6fd);
    }
    .cover:before{
      content:"";position:absolute;inset:14px;border-radius:18px;
      background:
        linear-gradient(135deg,rgba(37,99,235,.16),rgba(255,255,255,.3)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.42) 0 10px,rgba(37,99,235,.06) 10px 20px);
      border:1px solid rgba(255,255,255,.7);
      transition:transform .25s ease;
    }
    .content-card:hover .cover:before{transform:scale(1.035)}
    .play-mark{
      position:absolute;left:16px;bottom:16px;width:42px;height:42px;border-radius:999px;
      background:rgba(255,255,255,.92);color:var(--primary);
      display:grid;place-items:center;box-shadow:0 12px 22px rgba(15,23,42,.12);
    }
    .badge{
      display:inline-flex;align-items:center;gap:6px;
      padding:5px 10px;border-radius:999px;
      background:#eff6ff;color:var(--primary-700);
      border:1px solid var(--border-blue);
      font-size:12px;font-weight:800;
    }
    .badge.orange{background:#fff7ed;color:#c2410c;border-color:#fed7aa}
    .badge.gray{background:#f8fafc;color:#475569;border-color:#e2e8f0}
    .card-body{padding:18px;display:flex;flex-direction:column;gap:12px;flex:1}
    .card-title{font-size:18px;font-weight:820;line-height:1.35;letter-spacing:-.02em}
    .card-desc{color:var(--muted);font-size:14px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;color:#64748b;font-size:13px}
    .mini-btn{
      display:inline-flex;align-items:center;justify-content:center;
      height:34px;padding:0 12px;border-radius:999px;
      border:1px solid var(--border-blue);color:var(--primary-700);background:#fff;font-weight:800;font-size:13px;
      transition:background .2s ease,color .2s ease,transform .2s ease;
    }
    .mini-btn:hover{background:var(--primary);color:#fff;transform:translateY(-1px)}
    .side-panel{
      position:sticky;top:152px;
      display:grid;gap:18px;
    }
    .side-card{
      background:#fff;border:1px solid var(--border);
      border-radius:24px;padding:20px;box-shadow:var(--shadow-sm);
    }
    .side-title{font-size:18px;font-weight:850;margin-bottom:14px}
    .rank-list{display:grid;gap:12px}
    .rank-item{
      display:grid;grid-template-columns:36px 1fr;gap:12px;align-items:start;
      padding:12px;border-radius:18px;background:#f8fafc;border:1px solid transparent;
      transition:background .2s ease,border-color .2s ease,transform .2s ease;
    }
    .rank-item:hover{background:#eff6ff;border-color:var(--border-blue);transform:translateY(-2px)}
    .rank-num{
      width:32px;height:32px;border-radius:12px;display:grid;place-items:center;
      background:#dbeafe;color:var(--primary-700);font-weight:900;font-size:13px;
    }
    .rank-name{font-weight:800;line-height:1.4}
    .rank-meta{color:#64748b;font-size:13px;margin-top:3px}
    .topic-banner{
      border-radius:28px;
      background:
        radial-gradient(circle at 88% 10%,rgba(245,158,11,.2),transparent 22%),
        linear-gradient(135deg,#eff6ff,#ffffff 58%,#f0f9ff);
      border:1px solid var(--border-blue);
      box-shadow:var(--shadow-sm);
      padding:28px;
      display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
    }
    .topic-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
    .process-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
    .process-card{
      padding:22px;background:#fff;border:1px solid var(--border);
      border-radius:24px;box-shadow:var(--shadow-sm);position:relative;
      transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
    }
    .process-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--border-blue)}
    .step{
      width:42px;height:42px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--sky));
      color:#fff;display:grid;place-items:center;font-weight:900;margin-bottom:16px;
    }
    .pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:32px;flex-wrap:wrap}
    .page-btn{
      min-width:42px;height:42px;border-radius:14px;border:1px solid var(--border);
      background:#fff;color:var(--muted);display:inline-flex;align-items:center;justify-content:center;
      font-weight:800;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
    }
    .page-btn:hover{background:#eff6ff;color:var(--primary-700);border-color:var(--border-blue);transform:translateY(-1px)}
    .page-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}
    .faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
    .faq-card{
      background:#fff;border:1px solid var(--border);
      border-radius:24px;padding:22px;box-shadow:var(--shadow-sm);
      transition:background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    }
    .faq-card:hover{background:#f8fbff;border-color:var(--border-blue);transform:translateY(-2px);box-shadow:var(--shadow-md)}
    .faq-card h3{font-size:17px;font-weight:850;margin-bottom:8px}
    .faq-card p{color:var(--muted);font-size:15px}
    .cta-box{
      position:relative;overflow:hidden;
      border-radius:32px;
      padding:34px;
      background:
        radial-gradient(circle at 90% 14%,rgba(56,189,248,.25),transparent 28%),
        linear-gradient(135deg,#2563eb,#38bdf8);
      color:#fff;
      display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
      box-shadow:var(--shadow-blue);
    }
    .cta-box:before{
      content:"";position:absolute;inset:12px;border-radius:24px;border:1px solid rgba(255,255,255,.25);pointer-events:none;
    }
    .cta-box h2{font-size:clamp(26px,3vw,36px);line-height:1.2;font-weight:850;position:relative}
    .cta-box p{color:rgba(255,255,255,.86);max-width:650px;margin-top:10px;position:relative}
    .cta-actions{display:flex;gap:12px;position:relative;flex-wrap:wrap}
    .cta-box .btn-secondary{border-color:rgba(255,255,255,.55)}
    .site-footer{
      background:#fff;
      border-top:1px solid var(--border);
      padding:52px 0 28px;
    }
    .footer-grid{display:grid;grid-template-columns:1.6fr .7fr .9fr;gap:34px;align-items:start}
    .footer-title{font-size:16px;font-weight:850;margin-bottom:14px}
    .footer-links{display:grid;gap:10px}
    .footer-links a{color:var(--muted);transition:color .2s ease,transform .2s ease}
    .footer-links a:hover{color:var(--primary-700);transform:translateX(3px)}
    .copyright{
      margin-top:34px;padding-top:20px;border-top:1px solid var(--border);
      display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
      color:#64748b;font-size:14px;
    }
    @media (max-width:1100px){
      .header-actions .search-pill{display:none}
      .content-layout{grid-template-columns:1fr}
      .side-panel{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
      .library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .process-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:860px){
      .header-inner{height:68px}
      .nav-links,.header-actions{display:none}
      .menu-btn{display:flex}
      .mobile-panel .nav-links{display:grid;gap:8px}
      .mobile-panel .header-actions{display:grid;gap:12px;margin-top:12px}
      .mobile-panel .search-pill{display:flex;width:100%}
      .hero-grid{grid-template-columns:1fr}
      .filter-visual{min-height:auto}
      .section-head{display:block}
      .side-panel{grid-template-columns:1fr}
      .topic-banner,.cta-box{grid-template-columns:1fr}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
    }
    @media (max-width:560px){
      .site-container{width:min(100% - 28px,1180px)}
      .brand-text{max-width:210px;font-size:15px}
      .page-hero{padding:42px 0 28px}
      .hero-actions .btn,.cta-actions .btn{width:100%}
      .filter-bar-wrap{top:68px}
      .library-grid{grid-template-columns:1fr}
      .process-grid{grid-template-columns:1fr}
      .section{padding:56px 0}
      .section-tight{padding:40px 0}
      .content-card{border-radius:22px}
      .cta-box{padding:26px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }