/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-dark:#1d4ed8;
      --primary-soft:#dbeafe;
      --primary-tint:#eff6ff;
      --sky:#0ea5e9;
      --slate:#0f172a;
      --text:#1e293b;
      --muted:#64748b;
      --muted-2:#94a3b8;
      --border:#e2e8f0;
      --border-strong:#bfdbfe;
      --bg:#f6f9fe;
      --bg-2:#f8fafc;
      --card:#ffffff;
      --card-soft:#fbfdff;
      --warning:#f59e0b;
      --success:#10b981;
      --shadow:0 10px 30px rgba(15,23,42,.06);
      --shadow-hover:0 18px 45px rgba(15,23,42,.10);
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:30px;
      --sidebar:236px;
      --ease:all .22s ease;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--text);
      background:
        radial-gradient(circle at 85% 8%, rgba(37,99,235,.10), transparent 30%),
        radial-gradient(circle at 20% 90%, rgba(14,165,233,.10), transparent 34%),
        var(--bg);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0;cursor:pointer}
    ::selection{background:var(--primary-soft);color:var(--primary-dark)}
    :focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .skip-link{
      position:absolute;
      left:-999px;
      top:12px;
      z-index:1000;
      background:var(--primary);
      color:#fff;
      padding:10px 16px;
      border-radius:999px;
    }
    .skip-link:focus{left:16px}
    .app-sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar);
      background:rgba(255,255,255,.92);
      border-right:1px solid var(--border);
      box-shadow:8px 0 30px rgba(15,23,42,.035);
      padding:22px 16px;
      z-index:80;
      display:flex;
      flex-direction:column;
      backdrop-filter:blur(14px);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      padding:8px 8px 18px;
      border-bottom:1px solid var(--border);
      min-width:0;
    }
    .brand-mark{
      width:42px;
      height:42px;
      flex:0 0 42px;
      border-radius:14px;
      background:linear-gradient(145deg,var(--primary),var(--sky));
      color:#fff;
      display:grid;
      place-items:center;
      font-weight:800;
      box-shadow:0 12px 26px rgba(37,99,235,.22);
      position:relative;
      overflow:hidden;
    }
    .brand-mark:after{
      content:"";
      position:absolute;
      width:26px;
      height:3px;
      border-radius:99px;
      background:rgba(255,255,255,.65);
      transform:rotate(-35deg);
      right:-4px;
      bottom:10px;
    }
    .brand-text{min-width:0}
    .brand-title{
      display:block;
      font-weight:800;
      color:var(--slate);
      font-size:15px;
      line-height:1.25;
      letter-spacing:-.02em;
    }
    .brand-sub{
      display:block;
      color:var(--muted);
      font-size:12px;
      margin-top:3px;
      white-space:nowrap;
    }
    .side-label{
      margin:22px 10px 8px;
      font-size:12px;
      color:var(--muted-2);
      font-weight:700;
      letter-spacing:.08em;
    }
    .side-nav{display:grid;gap:7px}
    .nav-link{
      position:relative;
      display:flex;
      align-items:center;
      gap:10px;
      padding:11px 12px;
      border-radius:14px;
      color:#334155;
      font-size:14px;
      font-weight:650;
      border:1px solid transparent;
    }
    .nav-link .ico{
      width:28px;
      height:28px;
      border-radius:10px;
      background:var(--primary-tint);
      color:var(--primary);
      display:grid;
      place-items:center;
      font-size:15px;
      flex:0 0 28px;
    }
    .nav-link:hover{
      color:var(--primary);
      background:#f8fbff;
      border-color:var(--border);
      transform:translateX(2px);
    }
    .nav-link.active{
      background:var(--primary-tint);
      color:var(--primary-dark);
      border-color:#cfe0ff;
      font-weight:800;
    }
    .nav-link.active:before{
      content:"";
      position:absolute;
      left:-16px;
      top:11px;
      bottom:11px;
      width:3px;
      border-radius:99px;
      background:var(--primary);
    }
    .sidebar-note{
      margin-top:auto;
      padding:14px;
      border-radius:18px;
      background:linear-gradient(180deg,#f8fbff,#eef6ff);
      border:1px solid #dbeafe;
      color:var(--muted);
      font-size:12px;
    }
    .back-top{
      margin-top:10px;
      display:flex;
      align-items:center;
      justify-content:center;
      gap:6px;
      width:100%;
      padding:9px 10px;
      border-radius:12px;
      color:var(--primary);
      background:#fff;
      border:1px solid #dbeafe;
      font-weight:700;
    }
    .back-top:hover{background:var(--primary);color:#fff}
    .mobile-bar{
      display:none;
      position:sticky;
      top:0;
      z-index:90;
      height:64px;
      background:rgba(255,255,255,.94);
      border-bottom:1px solid var(--border);
      backdrop-filter:blur(14px);
      padding:0 18px;
      align-items:center;
      justify-content:space-between;
    }
    .menu-toggle{
      width:42px;
      height:42px;
      border-radius:14px;
      background:var(--primary-tint);
      color:var(--primary);
      display:grid;
      place-items:center;
      font-size:21px;
      transition:var(--ease);
    }
    .menu-toggle:hover{background:var(--primary);color:#fff}
    .drawer-mask{
      display:none;
      position:fixed;
      inset:0;
      background:rgba(15,23,42,.28);
      z-index:95;
      opacity:0;
      pointer-events:none;
      transition:var(--ease);
    }
    .main{
      margin-left:var(--sidebar);
      min-height:100vh;
    }
    .container{
      width:min(1180px,100%);
      margin:0 auto;
      padding:34px 48px 0;
    }
    .section{padding:82px 0}
    .section.compact{padding:58px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(37,99,235,.09);
      color:var(--primary-dark);
      font-size:13px;
      font-weight:800;
      border:1px solid rgba(37,99,235,.12);
    }
    .dot{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--success);
      box-shadow:0 0 0 5px rgba(16,185,129,.12);
    }
    .hero{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg,rgba(239,246,255,.98),rgba(255,255,255,.92)),
        radial-gradient(circle at 80% 20%, rgba(14,165,233,.18), transparent 28%);
      border:1px solid #dbeafe;
      box-shadow:var(--shadow);
      padding:54px;
      display:grid;
      grid-template-columns:minmax(0,1.18fr) minmax(320px,.82fr);
      gap:36px;
      align-items:center;
    }
    .hero:before{
      content:"";
      position:absolute;
      width:260px;
      height:260px;
      right:-110px;
      top:-90px;
      background:rgba(37,99,235,.10);
      border-radius:50%;
    }
    .hero-content{position:relative;z-index:1}
    h1,h2,h3,p{margin-top:0}
    h1{
      margin:18px 0 18px;
      color:var(--slate);
      font-size:clamp(32px,5vw,50px);
      line-height:1.16;
      letter-spacing:-.04em;
      font-weight:850;
    }
    .hero-lead{
      max-width:720px;
      font-size:17px;
      color:#475569;
      line-height:1.9;
      margin-bottom:28px;
    }
    .hero-actions,.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:46px;
      padding:12px 20px;
      border-radius:999px;
      font-weight:800;
      font-size:14px;
      border:1px solid transparent;
      transition:var(--ease);
      user-select:none;
    }
    .btn-primary{
      background:var(--primary);
      color:#fff;
      box-shadow:0 12px 24px rgba(37,99,235,.22);
    }
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 16px 30px rgba(37,99,235,.28)}
    .btn-secondary{
      background:#fff;
      color:var(--primary-dark);
      border-color:#bfdbfe;
    }
    .btn-secondary:hover{background:var(--primary-tint);transform:translateY(-2px)}
    .btn-text{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--primary);
      font-weight:800;
      font-size:14px;
    }
    .btn-text span{transition:var(--ease)}
    .btn-text:hover span{transform:translateX(4px)}
    .hero-meta{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:24px;
    }
    .mini-stat{
      padding:9px 12px;
      border-radius:14px;
      background:rgba(255,255,255,.72);
      border:1px solid rgba(226,232,240,.85);
      color:var(--muted);
      font-size:13px;
    }
    .mini-stat strong{color:var(--slate)}
    .visual-stack{
      position:relative;
      min-height:380px;
      z-index:1;
    }
    .cover-card{
      position:absolute;
      inset:24px 0 auto 26px;
      min-height:260px;
      border-radius:28px;
      background:#fff;
      border:1px solid #dbeafe;
      box-shadow:var(--shadow-hover);
      padding:24px;
      transform:rotate(-1.5deg);
    }
    .cover-card.secondary{
      inset:auto 28px 18px 0;
      min-height:210px;
      transform:rotate(2deg);
      background:linear-gradient(180deg,#ffffff,#f8fbff);
    }
    .cover-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:6px 10px;
      border-radius:999px;
      background:var(--primary-tint);
      color:var(--primary-dark);
      font-size:12px;
      font-weight:800;
      border:1px solid rgba(37,99,235,.10);
    }
    .badge.warn{background:#fffbeb;color:#b45309;border-color:#fde68a}
    .badge.sky{background:#ecfeff;color:#0369a1;border-color:#bae6fd}
    .index-lines{display:grid;gap:10px}
    .index-line{
      height:12px;
      border-radius:99px;
      background:#eaf1fb;
      overflow:hidden;
    }
    .index-line b{
      display:block;
      height:100%;
      border-radius:99px;
      background:linear-gradient(90deg,var(--primary),var(--sky));
    }
    .folder-tabs{
      display:flex;
      gap:8px;
      flex-wrap:wrap;
      margin:18px 0;
    }
    .folder-tabs span{
      padding:7px 10px;
      border-radius:10px;
      background:#f1f5f9;
      color:var(--muted);
      font-size:12px;
      font-weight:700;
    }
    .visual-number{
      font-size:42px;
      line-height:1;
      font-weight:900;
      color:var(--primary);
      letter-spacing:-.04em;
    }
    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:28px;
      margin-bottom:28px;
    }
    .section-title h2{
      color:var(--slate);
      font-size:clamp(26px,3.2vw,34px);
      line-height:1.25;
      letter-spacing:-.03em;
      margin:12px 0 8px;
    }
    .section-title p{
      color:var(--muted);
      max-width:720px;
      margin:0;
    }
    .目录-grid{
      display:grid;
      grid-template-columns:1.05fr 1.45fr;
      gap:24px;
    }
    .feature-cover{
      min-height:420px;
      border-radius:26px;
      padding:28px;
      background:
        linear-gradient(160deg,rgba(37,99,235,.96),rgba(14,165,233,.82)),
        var(--primary);
      color:#fff;
      box-shadow:0 20px 45px rgba(37,99,235,.22);
      position:relative;
      overflow:hidden;
    }
    .feature-cover:before,.feature-cover:after{
      content:"";
      position:absolute;
      border-radius:50%;
      background:rgba(255,255,255,.12);
    }
    .feature-cover:before{width:210px;height:210px;right:-80px;top:-60px}
    .feature-cover:after{width:150px;height:150px;left:-50px;bottom:-60px}
    .feature-cover-content{position:relative;z-index:1}
    .feature-cover h2{
      font-size:30px;
      line-height:1.25;
      margin:20px 0 14px;
      letter-spacing:-.03em;
    }
    .feature-cover p{color:rgba(255,255,255,.86);margin-bottom:28px}
    .metric-row{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
      margin-top:34px;
    }
    .metric{
      padding:16px;
      border-radius:18px;
      background:rgba(255,255,255,.14);
      border:1px solid rgba(255,255,255,.20);
    }
    .metric strong{display:block;font-size:28px;line-height:1;font-weight:900}
    .metric span{font-size:12px;color:rgba(255,255,255,.78)}
    .directory-list{
      display:grid;
      gap:14px;
    }
    .directory-item{
      display:grid;
      grid-template-columns:46px minmax(0,1fr) auto;
      gap:14px;
      align-items:center;
      padding:20px;
      border-radius:20px;
      background:var(--card);
      border:1px solid var(--border);
      box-shadow:var(--shadow);
      transition:var(--ease);
    }
    .directory-item:hover{
      transform:translateY(-3px);
      border-color:var(--border-strong);
      box-shadow:var(--shadow-hover);
    }
    .directory-icon{
      width:46px;
      height:46px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:var(--primary-tint);
      color:var(--primary);
      font-size:22px;
    }
    .directory-item h3{
      margin:0 0 4px;
      color:var(--slate);
      font-size:18px;
      line-height:1.35;
    }
    .directory-item p{margin:0;color:var(--muted);font-size:14px}
    .arrow{
      color:var(--primary);
      font-weight:900;
      transition:var(--ease);
    }
    .directory-item:hover .arrow{transform:translateX(4px)}
    .value-strip{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .value-card{
      padding:22px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow);
      transition:var(--ease);
    }
    .value-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--border-strong)}
    .value-card .num{
      width:38px;
      height:38px;
      display:grid;
      place-items:center;
      border-radius:14px;
      background:var(--primary-tint);
      color:var(--primary);
      font-weight:900;
      margin-bottom:14px;
    }
    .value-card h3{font-size:18px;color:var(--slate);margin-bottom:8px}
    .value-card p{font-size:14px;color:var(--muted);margin:0}
    .flow-list{
      display:grid;
      gap:16px;
    }
    .entry-card{
      position:relative;
      display:grid;
      grid-template-columns:130px minmax(0,1fr) auto;
      gap:18px;
      align-items:center;
      padding:22px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow);
      transition:var(--ease);
    }
    .entry-card:before{
      content:"";
      position:absolute;
      left:0;
      top:24px;
      bottom:24px;
      width:4px;
      border-radius:0 99px 99px 0;
      background:var(--primary);
      opacity:.65;
    }
    .entry-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--border-strong)}
    .entry-meta{
      display:grid;
      gap:8px;
      color:var(--muted);
      font-size:13px;
      font-weight:700;
    }
    .entry-card h3{
      margin:0 0 8px;
      color:var(--slate);
      font-size:20px;
      line-height:1.35;
    }
    .entry-card p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
      overflow:hidden;
    }
    .recommend-wrap{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:20px;
    }
    .recommend-card{
      min-height:210px;
      padding:26px;
      border-radius:24px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow);
      transition:var(--ease);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .recommend-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--border-strong)}
    .recommend-card h3{font-size:22px;line-height:1.35;color:var(--slate);margin:14px 0 10px}
    .recommend-card p{color:var(--muted);margin:0;font-size:15px}
    .dark-panel{
      border-radius:28px;
      background:
        radial-gradient(circle at 80% 20%,rgba(14,165,233,.22),transparent 34%),
        linear-gradient(135deg,#0f172a,#1e3a8a);
      color:#fff;
      padding:34px;
      overflow:hidden;
      position:relative;
    }
    .dark-panel h2{font-size:32px;line-height:1.28;margin:12px 0;color:#fff}
    .dark-panel p{color:rgba(255,255,255,.76);max-width:780px}
    .signal-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      margin-top:24px;
    }
    .signal{
      padding:18px;
      border-radius:18px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.14);
    }
    .signal strong{display:block;font-size:28px;font-weight:900;line-height:1;color:#fff}
    .signal span{display:block;margin-top:8px;color:rgba(255,255,255,.72);font-size:13px}
    .faq-grid{
      display:grid;
      grid-template-columns:.85fr 1.15fr;
      gap:24px;
      align-items:start;
    }
    .faq-side{
      border-radius:24px;
      padding:26px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:var(--shadow);
    }
    .faq-side h2{font-size:30px;color:var(--slate);line-height:1.25;margin:12px 0}
    .faq-side p{color:var(--muted);margin:0}
    .faq-list{display:grid;gap:12px}
    details{
      border-radius:18px;
      background:#fff;
      border:1px solid var(--border);
      box-shadow:0 8px 20px rgba(15,23,42,.04);
      overflow:hidden;
      transition:var(--ease);
    }
    details[open]{border-color:var(--border-strong);box-shadow:var(--shadow)}
    summary{
      list-style:none;
      cursor:pointer;
      padding:18px 20px;
      color:var(--slate);
      font-weight:800;
      display:flex;
      justify-content:space-between;
      gap:18px;
    }
    summary::-webkit-details-marker{display:none}
    summary:after{
      content:"+";
      width:24px;
      height:24px;
      border-radius:50%;
      display:grid;
      place-items:center;
      flex:0 0 24px;
      background:var(--primary-tint);
      color:var(--primary);
      font-weight:900;
    }
    details[open] summary:after{content:"−";background:var(--primary);color:#fff}
    details p{
      margin:0;
      padding:0 20px 18px;
      color:var(--muted);
      font-size:15px;
    }
    .subscribe{
      display:grid;
      grid-template-columns:1fr auto;
      gap:12px;
      align-items:center;
      padding:8px;
      background:#fff;
      border:1px solid var(--border);
      border-radius:18px;
      max-width:620px;
      box-shadow:var(--shadow);
    }
    .subscribe input{
      border:0;
      outline:0;
      min-height:46px;
      padding:0 14px;
      color:var(--slate);
      background:transparent;
      min-width:0;
    }
    .subscribe input::placeholder{color:var(--muted-2)}
    .subscribe:focus-within{
      border-color:var(--primary);
      box-shadow:0 0 0 4px rgba(37,99,235,.10),var(--shadow);
    }
    .cta{
      border-radius:30px;
      padding:38px;
      background:
        radial-gradient(circle at 20% 20%,rgba(37,99,235,.13),transparent 30%),
        linear-gradient(135deg,#eff6ff,#ffffff);
      border:1px solid #dbeafe;
      box-shadow:var(--shadow);
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
    }
    .cta h2{
      font-size:32px;
      color:var(--slate);
      line-height:1.28;
      margin:0 0 10px;
      letter-spacing:-.03em;
    }
    .cta p{margin:0;color:var(--muted);max-width:760px}
    .footer{
      margin-top:70px;
      padding:34px 0 40px;
      border-top:1px solid var(--border);
    }
    .footer-card{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:24px;
      border-radius:24px;
      background:rgba(255,255,255,.72);
      border:1px solid var(--border);
      padding:24px;
    }
    .footer h2{
      font-size:18px;
      color:var(--slate);
      margin:0 0 8px;
    }
    .footer p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .footer-links{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
      align-content:start;
    }
    .footer-links a{
      padding:8px 10px;
      border-radius:12px;
      color:var(--muted);
      font-size:14px;
      font-weight:700;
    }
    .footer-links a:hover{background:var(--primary-tint);color:var(--primary)}
    .copyright{
      margin-top:14px;
      color:var(--muted-2);
      font-size:12px;
      text-align:right;
    }
    @media (max-width:1100px){
      :root{--sidebar:88px}
      .app-sidebar{width:var(--sidebar);padding:18px 12px}
      .brand{justify-content:center;padding:8px 0 18px}
      .brand-text,.side-label,.nav-link span:not(.ico),.sidebar-note{display:none}
      .nav-link{justify-content:center;padding:10px}
      .nav-link.active:before{left:-12px}
      .container{padding-left:34px;padding-right:34px}
      .hero{grid-template-columns:1fr;padding:40px}
      .visual-stack{min-height:310px}
      .目录-grid,.faq-grid{grid-template-columns:1fr}
      .value-strip{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:767px){
      .mobile-bar{display:flex}
      .app-sidebar{
        transform:translateX(-105%);
        width:min(320px,82vw);
        transition:var(--ease);
        z-index:100;
      }
      body.menu-open .app-sidebar{transform:translateX(0)}
      body.menu-open .drawer-mask{display:block;opacity:1;pointer-events:auto}
      .brand-text,.side-label,.nav-link span:not(.ico),.sidebar-note{display:block}
      .brand{justify-content:flex-start}
      .nav-link{justify-content:flex-start}
      .main{margin-left:0}
      .container{padding:22px 20px 0}
      .section{padding:58px 0}
      .section.compact{padding:42px 0}
      .hero{padding:28px;border-radius:24px}
      .hero-actions,.cta-actions{flex-direction:column}
      .btn{width:100%}
      .visual-stack{min-height:270px}
      .cover-card{inset:12px 8px auto 8px}
      .cover-card.secondary{inset:auto 8px 10px 8px}
      .section-head{display:block}
      .目录-grid,.recommend-wrap,.faq-grid,.cta,.footer-card{grid-template-columns:1fr}
      .directory-item{grid-template-columns:42px minmax(0,1fr);align-items:start}
      .directory-item .arrow{grid-column:2}
      .value-strip,.metric-row,.signal-grid{grid-template-columns:1fr}
      .entry-card{grid-template-columns:1fr;gap:12px}
      .entry-card:before{top:20px;bottom:auto;height:4px;width:52px;border-radius:0 0 99px 0}
      .subscribe{grid-template-columns:1fr;padding:10px}
      .subscribe .btn{width:100%}
      .cta{padding:28px}
      .footer-links{justify-content:flex-start}
      .copyright{text-align:left}
    }
    @media (max-width:520px){
      .brand-title{font-size:13px}
      .mobile-bar .brand-sub{display:none}
      h1{font-size:31px}
      .hero-lead{font-size:15px}
      .feature-cover,.dark-panel{padding:24px}
      .directory-item,.entry-card,.recommend-card,.value-card{padding:18px}
    }

/* roulang page: category2 */
:root{
      --primary:#2563eb;
      --primary-dark:#1d4ed8;
      --primary-soft:#dbeafe;
      --sky:#0ea5e9;
      --ink:#0f172a;
      --text:#334155;
      --muted:#64748b;
      --weak:#94a3b8;
      --line:#e2e8f0;
      --line-strong:#bfdbfe;
      --bg:#f6f9fe;
      --panel:#ffffff;
      --panel-soft:#fbfdff;
      --sidebar:#ffffff;
      --success:#16a34a;
      --warn:#f59e0b;
      --radius-sm:12px;
      --radius:20px;
      --radius-lg:30px;
      --shadow:0 10px 30px rgba(15,23,42,.06);
      --shadow-hover:0 18px 45px rgba(15,23,42,.10);
      --sidebar-w:236px;
      --max:1180px;
      --ease:all .22s ease;
    }

    *{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 78% 8%, rgba(14,165,233,.12), transparent 34%),
        radial-gradient(circle at 24% 18%, rgba(37,99,235,.10), transparent 28%),
        linear-gradient(180deg,#f8fbff 0%,var(--bg) 48%,#f8fafc 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img,svg{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    button{border:0;background:none;cursor:pointer}
    ::selection{background:var(--primary-soft);color:var(--ink)}
    :focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px;border-radius:10px}

    .app-sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar-w);
      background:rgba(255,255,255,.94);
      border-right:1px solid var(--line);
      padding:24px 18px;
      z-index:80;
      display:flex;
      flex-direction:column;
      backdrop-filter:saturate(1.2) blur(12px);
    }
    .brand{
      display:flex;
      gap:12px;
      align-items:center;
      padding:10px 10px 20px;
      border-bottom:1px solid var(--line);
      margin-bottom:22px;
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:#fff;
      font-weight:800;
      background:linear-gradient(135deg,var(--primary),var(--sky));
      box-shadow:0 12px 26px rgba(37,99,235,.24);
      flex:0 0 auto;
    }
    .brand-text{min-width:0}
    .brand-title{
      display:block;
      color:var(--ink);
      font-weight:800;
      font-size:15px;
      line-height:1.25;
      letter-spacing:-.02em;
    }
    .brand-sub{
      display:block;
      color:var(--muted);
      font-size:12px;
      margin-top:3px;
    }
    .side-label{
      color:var(--weak);
      font-size:12px;
      font-weight:800;
      letter-spacing:.08em;
      padding:0 10px 8px;
    }
    .side-nav{display:grid;gap:8px}
    .nav-link{
      position:relative;
      display:flex;
      align-items:center;
      gap:10px;
      padding:12px 12px;
      border-radius:14px;
      color:var(--475569);
      font-size:14px;
      font-weight:650;
      border:1px solid transparent;
      transition:var(--ease);
    }
    .nav-link .ico{
      width:26px;
      height:26px;
      border-radius:10px;
      display:grid;
      place-items:center;
      color:var(--primary);
      background:#eff6ff;
      font-size:14px;
      transition:var(--ease);
    }
    .nav-link:hover{
      color:var(--primary-dark);
      background:#f1f7ff;
      border-color:#dbeafe;
      transform:translateX(2px);
    }
    .nav-link.active{
      color:var(--primary-dark);
      background:var(--primary-soft);
      border-color:#bfdbfe;
      font-weight:800;
    }
    .nav-link.active:before{
      content:"";
      position:absolute;
      left:-18px;
      top:12px;
      bottom:12px;
      width:3px;
      border-radius:999px;
      background:var(--primary);
    }
    .nav-link.active .ico{
      color:#fff;
      background:var(--primary);
    }
    .sidebar-note{
      margin-top:auto;
      padding:16px;
      border:1px solid var(--line);
      border-radius:18px;
      background:linear-gradient(180deg,#fff,#f8fbff);
      color:var(--muted);
      font-size:12px;
      line-height:1.65;
      box-shadow:var(--shadow);
    }
    .sidebar-note strong{color:var(--ink)}
    .back-top{
      display:inline-flex;
      margin-top:12px;
      color:var(--primary);
      font-weight:800;
    }
    .back-top:hover{color:var(--primary-dark)}

    .mobile-bar{
      display:none;
      position:sticky;
      top:0;
      z-index:90;
      height:64px;
      align-items:center;
      justify-content:space-between;
      padding:0 18px;
      background:rgba(255,255,255,.94);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .mobile-brand{
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--ink);
      font-weight:800;
      min-width:0;
    }
    .mobile-brand .brand-mark{width:36px;height:36px;border-radius:12px}
    .mobile-title{
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
      max-width:220px;
      font-size:14px;
    }
    .menu-btn{
      width:42px;
      height:42px;
      border-radius:14px;
      background:#eff6ff;
      color:var(--primary);
      font-weight:900;
      display:grid;
      place-items:center;
      transition:var(--ease);
    }
    .menu-btn:hover{background:#dbeafe;color:var(--primary-dark)}
    .drawer-mask{
      position:fixed;
      inset:0;
      background:rgba(15,23,42,.28);
      z-index:70;
      opacity:0;
      pointer-events:none;
      transition:var(--ease);
    }
    body.menu-open .drawer-mask{opacity:1;pointer-events:auto}

    .page{
      margin-left:var(--sidebar-w);
      min-height:100vh;
    }
    .container{
      width:min(var(--max),calc(100% - 88px));
      margin:0 auto;
    }
    main{padding:40px 0 0}
    .section{padding:76px 0 0}
    .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:28px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:#eff6ff;
      color:var(--primary-dark);
      font-size:13px;
      font-weight:800;
      border:1px solid #dbeafe;
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      color:var(--ink);
      font-size:clamp(32px,4vw,48px);
      line-height:1.16;
      letter-spacing:-.04em;
      margin-bottom:18px;
      font-weight:850;
    }
    h2{
      color:var(--ink);
      font-size:clamp(25px,2.7vw,34px);
      line-height:1.25;
      letter-spacing:-.03em;
      margin-bottom:10px;
      font-weight:820;
    }
    h3{
      color:var(--ink);
      font-size:19px;
      line-height:1.35;
      margin-bottom:8px;
      font-weight:780;
    }
    p{color:var(--text)}
    .lead{
      font-size:17px;
      color:#475569;
      max-width:720px;
      line-height:1.9;
    }
    .muted{color:var(--muted)}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:11px 18px;
      border-radius:999px;
      border:1px solid transparent;
      font-weight:800;
      font-size:14px;
      transition:var(--ease);
      white-space:nowrap;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--primary),#1d4ed8);
      box-shadow:0 14px 28px rgba(37,99,235,.20);
    }
    .btn-primary:hover{
      transform:translateY(-2px);
      background:linear-gradient(135deg,#1d4ed8,#1e40af);
      box-shadow:0 18px 34px rgba(37,99,235,.26);
    }
    .btn-secondary{
      background:#fff;
      color:var(--primary-dark);
      border-color:#bfdbfe;
    }
    .btn-secondary:hover{
      background:#eff6ff;
      transform:translateY(-2px);
      border-color:#93c5fd;
    }
    .text-link{
      display:inline-flex;
      align-items:center;
      gap:6px;
      color:var(--primary);
      font-weight:800;
      transition:var(--ease);
    }
    .text-link:hover{color:var(--primary-dark);gap:10px}
    .badge{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:5px 10px;
      border-radius:999px;
      background:#eff6ff;
      color:var(--primary-dark);
      border:1px solid #dbeafe;
      font-size:12px;
      font-weight:800;
      line-height:1.2;
    }
    .badge.green{background:#ecfdf5;color:#15803d;border-color:#bbf7d0}
    .badge.gray{background:#f8fafc;color:#475569;border-color:#e2e8f0}
    .badge.warn{background:#fffbeb;color:#b45309;border-color:#fde68a}

    .hero{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg,rgba(219,234,254,.92),rgba(255,255,255,.96) 52%,rgba(240,249,255,.98)),
        radial-gradient(circle at 88% 12%,rgba(14,165,233,.16),transparent 30%);
      border:1px solid #dbeafe;
      padding:42px;
      box-shadow:var(--shadow);
    }
    .hero:before{
      content:"";
      position:absolute;
      right:-70px;
      top:-70px;
      width:220px;
      height:220px;
      border-radius:999px;
      background:rgba(37,99,235,.10);
    }
    .hero-grid{
      position:relative;
      display:grid;
      grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);
      gap:32px;
      align-items:center;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
      color:var(--muted);
      font-size:13px;
      font-weight:700;
      margin-bottom:18px;
    }
    .breadcrumb a{color:var(--primary)}
    .breadcrumb a:hover{color:var(--primary-dark)}
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:26px;
    }
    .quick-tags{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:18px;
    }
    .status-panel{
      background:rgba(255,255,255,.84);
      border:1px solid #dbeafe;
      border-radius:24px;
      padding:22px;
      box-shadow:var(--shadow);
    }
    .status-title{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:16px;
      color:var(--ink);
      font-weight:850;
    }
    .meter{
      height:10px;
      border-radius:999px;
      background:#e2e8f0;
      overflow:hidden;
      margin:12px 0 18px;
    }
    .meter span{
      display:block;
      height:100%;
      width:76%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--sky));
    }
    .stat-row{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
    }
    .stat-box{
      padding:14px 12px;
      border-radius:16px;
      background:#f8fbff;
      border:1px solid var(--line);
    }
    .stat-box strong{
      display:block;
      color:var(--ink);
      font-size:22px;
      line-height:1.1;
    }
    .stat-box span{
      display:block;
      color:var(--muted);
      font-size:12px;
      margin-top:5px;
    }

    .content-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 300px;
      gap:28px;
      align-items:start;
    }
    .toc-card{
      position:sticky;
      top:28px;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      padding:20px;
    }
    .toc-card h3{font-size:17px;margin-bottom:14px}
    .toc-list{display:grid;gap:8px;margin:0;padding:0;list-style:none}
    .toc-list a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:10px 12px;
      border-radius:12px;
      color:#475569;
      font-size:14px;
      font-weight:750;
      transition:var(--ease);
      background:#f8fafc;
      border:1px solid transparent;
    }
    .toc-list a:hover{
      color:var(--primary-dark);
      background:#eff6ff;
      border-color:#dbeafe;
    }

    .timeline{
      position:relative;
      display:grid;
      gap:18px;
      padding-left:28px;
    }
    .timeline:before{
      content:"";
      position:absolute;
      left:8px;
      top:8px;
      bottom:8px;
      width:2px;
      background:#dbeafe;
      border-radius:99px;
    }
    .timeline-item{
      position:relative;
      border-radius:22px;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      padding:24px;
      transition:var(--ease);
    }
    .timeline-item:hover{
      transform:translateY(-3px);
      border-color:var(--line-strong);
      box-shadow:var(--shadow-hover);
    }
    .timeline-item:before{
      content:"";
      position:absolute;
      left:-26px;
      top:28px;
      width:14px;
      height:14px;
      border-radius:999px;
      background:var(--primary);
      box-shadow:0 0 0 6px #dbeafe;
    }
    .time-meta{
      display:flex;
      gap:10px;
      align-items:center;
      flex-wrap:wrap;
      margin-bottom:12px;
      color:var(--muted);
      font-size:13px;
      font-weight:750;
    }
    .timeline-foot{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:16px;
      flex-wrap:wrap;
      margin-top:16px;
      padding-top:16px;
      border-top:1px solid var(--line);
    }
    .tagline{display:flex;gap:8px;flex-wrap:wrap}

    .recommend-grid{
      display:grid;
      grid-template-columns:minmax(0,1.12fr) minmax(280px,.88fr);
      gap:20px;
    }
    .feature-card,
    .mini-card,
    .step-card,
    .note-card,
    .faq details,
    .cta-card{
      background:#fff;
      border:1px solid var(--line);
      border-radius:24px;
      box-shadow:var(--shadow);
      transition:var(--ease);
    }
    .feature-card:hover,
    .mini-card:hover,
    .step-card:hover,
    .note-card:hover{
      transform:translateY(-3px);
      border-color:var(--line-strong);
      box-shadow:var(--shadow-hover);
    }
    .feature-card{
      min-height:100%;
      padding:30px;
      background:
        linear-gradient(145deg,#fff 0%,#f8fbff 58%,#eff6ff 100%);
      display:flex;
      flex-direction:column;
      justify-content:space-between;
    }
    .feature-top{
      display:flex;
      justify-content:space-between;
      align-items:flex-start;
      gap:18px;
      margin-bottom:18px;
    }
    .feature-icon{
      width:54px;
      height:54px;
      border-radius:18px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--sky));
      box-shadow:0 16px 28px rgba(37,99,235,.22);
      font-size:22px;
      flex:0 0 auto;
    }
    .feature-card h3{font-size:25px;margin-bottom:12px}
    .score-line{
      display:grid;
      gap:10px;
      margin-top:24px;
    }
    .score-row{
      display:grid;
      grid-template-columns:86px 1fr 40px;
      align-items:center;
      gap:12px;
      color:var(--muted);
      font-size:13px;
      font-weight:750;
    }
    .bar{
      height:8px;
      border-radius:999px;
      overflow:hidden;
      background:#e2e8f0;
    }
    .bar span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),var(--sky));
    }
    .mini-stack{display:grid;gap:20px}
    .mini-card{padding:24px}
    .mini-card .badge{margin-bottom:12px}

    .guide-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:18px;
    }
    .step-card{
      padding:22px;
      position:relative;
      overflow:hidden;
    }
    .step-card:after{
      content:"";
      position:absolute;
      right:-34px;
      top:-34px;
      width:92px;
      height:92px;
      border-radius:999px;
      background:rgba(37,99,235,.08);
    }
    .step-num{
      width:38px;
      height:38px;
      border-radius:14px;
      display:grid;
      place-items:center;
      color:var(--primary-dark);
      background:#eff6ff;
      border:1px solid #dbeafe;
      font-weight:900;
      margin-bottom:16px;
    }

    .notes{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:20px;
    }
    .note-card{
      padding:24px;
      display:grid;
      grid-template-columns:48px 1fr;
      gap:16px;
      align-items:start;
    }
    .note-ico{
      width:48px;
      height:48px;
      border-radius:16px;
      background:#eff6ff;
      color:var(--primary);
      display:grid;
      place-items:center;
      font-weight:900;
      font-size:20px;
    }
    .dark-band{
      border-radius:28px;
      padding:30px;
      background:
        radial-gradient(circle at 15% 20%,rgba(14,165,233,.22),transparent 34%),
        linear-gradient(135deg,#0f172a,#172554);
      color:#e2e8f0;
      overflow:hidden;
      box-shadow:0 20px 50px rgba(15,23,42,.16);
    }
    .dark-band h2,.dark-band h3{color:#fff}
    .dark-band p{color:#cbd5e1}
    .insight-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:14px;
      margin-top:22px;
    }
    .insight{
      padding:18px;
      border-radius:18px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(226,232,240,.14);
    }
    .insight strong{
      display:block;
      font-size:28px;
      color:#fff;
      line-height:1.1;
    }
    .insight span{
      display:block;
      margin-top:8px;
      color:#cbd5e1;
      font-size:13px;
    }

    .faq{
      display:grid;
      gap:14px;
    }
    .faq details{
      padding:0;
      overflow:hidden;
    }
    .faq details[open]{
      border-color:#bfdbfe;
      box-shadow:var(--shadow-hover);
    }
    .faq summary{
      list-style:none;
      cursor:pointer;
      padding:20px 22px;
      color:var(--ink);
      font-weight:850;
      display:flex;
      justify-content:space-between;
      gap:18px;
      align-items:center;
    }
    .faq summary::-webkit-details-marker{display:none}
    .faq summary:after{
      content:"+";
      width:28px;
      height:28px;
      border-radius:10px;
      display:grid;
      place-items:center;
      color:var(--primary);
      background:#eff6ff;
      flex:0 0 auto;
      transition:var(--ease);
    }
    .faq details[open] summary:after{
      content:"–";
      background:var(--primary);
      color:#fff;
    }
    .faq .answer{
      padding:0 22px 22px;
      color:#475569;
      line-height:1.85;
      border-top:1px solid var(--line);
      padding-top:16px;
    }

    .cta-card{
      display:grid;
      grid-template-columns:1fr auto;
      gap:24px;
      align-items:center;
      padding:32px;
      background:
        linear-gradient(135deg,#eff6ff,#ffffff 68%),
        radial-gradient(circle at 95% 10%,rgba(14,165,233,.15),transparent 30%);
      border-color:#dbeafe;
    }
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}

    .footer{
      padding:76px 0 36px;
    }
    .footer-card{
      display:grid;
      grid-template-columns:1fr auto;
      gap:30px;
      align-items:center;
      background:#fff;
      border:1px solid var(--line);
      border-radius:26px;
      padding:28px;
      box-shadow:var(--shadow);
    }
    .footer h2{
      font-size:22px;
      margin-bottom:8px;
    }
    .footer p{
      max-width:560px;
      margin-bottom:0;
      color:var(--muted);
      font-size:14px;
    }
    .footer-links{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      justify-content:flex-end;
      margin-bottom:12px;
    }
    .footer-links a{
      padding:8px 11px;
      border-radius:999px;
      color:var(--primary-dark);
      background:#eff6ff;
      border:1px solid #dbeafe;
      font-size:13px;
      font-weight:800;
      transition:var(--ease);
    }
    .footer-links a:hover{
      background:#dbeafe;
      transform:translateY(-1px);
    }
    .copyright{
      color:var(--muted);
      font-size:13px;
      text-align:right;
    }

    @media (max-width:1100px){
      :root{--sidebar-w:88px}
      .app-sidebar{width:var(--sidebar-w);padding:20px 12px}
      .brand{justify-content:center;padding:8px 0 18px}
      .brand-text,.side-label,.nav-link span:not(.ico),.sidebar-note{display:none}
      .nav-link{justify-content:center;padding:12px 8px}
      .nav-link.active:before{left:-12px}
      .container{width:min(var(--max),calc(100% - 56px))}
      .hero-grid,.content-layout,.recommend-grid{grid-template-columns:1fr}
      .toc-card{position:relative;top:auto}
      .toc-list{grid-template-columns:repeat(2,1fr)}
      .guide-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:768px){
      body{background:#f8fbff}
      .mobile-bar{display:flex}
      .app-sidebar{
        width:min(82vw,320px);
        transform:translateX(-105%);
        transition:var(--ease);
        box-shadow:0 24px 60px rgba(15,23,42,.18);
      }
      body.menu-open .app-sidebar{transform:translateX(0)}
      .app-sidebar .brand{justify-content:flex-start;padding:10px 10px 20px}
      .app-sidebar .brand-text,
      .app-sidebar .side-label,
      .app-sidebar .nav-link span:not(.ico),
      .app-sidebar .sidebar-note{display:block}
      .app-sidebar .nav-link{justify-content:flex-start;padding:12px}
      .page{margin-left:0}
      main{padding-top:24px}
      .container{width:calc(100% - 36px)}
      .hero{padding:28px 22px;border-radius:24px}
      .section{padding-top:56px}
      .section-head{display:block}
      .stat-row,.notes,.insight-grid{grid-template-columns:1fr}
      .timeline{padding-left:22px}
      .timeline-item{padding:22px 18px}
      .timeline-item:before{left:-23px}
      .toc-list{grid-template-columns:1fr}
      .guide-grid{grid-template-columns:1fr}
      .note-card{grid-template-columns:1fr}
      .cta-card{grid-template-columns:1fr;padding:24px}
      .cta-actions{justify-content:flex-start}
      .footer-card{grid-template-columns:1fr}
      .footer-links{justify-content:flex-start}
      .copyright{text-align:left}
    }
    @media (max-width:520px){
      .mobile-title{max-width:178px}
      h1{font-size:31px}
      .lead{font-size:15.5px}
      .hero-actions,.cta-actions{display:grid}
      .btn{width:100%}
      .status-panel{padding:18px}
      .stat-row{grid-template-columns:1fr}
      .feature-card,.mini-card,.step-card,.note-card{padding:20px}
      .score-row{grid-template-columns:76px 1fr 34px;gap:8px}
      .dark-band{padding:24px 20px;border-radius:24px}
    }

/* roulang page: category1 */
:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --primary-soft: #dbeafe;
      --primary-weak: #eff6ff;
      --cyan: #0ea5e9;
      --slate-950: #0f172a;
      --slate-800: #1e293b;
      --slate-700: #334155;
      --slate-600: #475569;
      --slate-500: #64748b;
      --slate-200: #e2e8f0;
      --slate-100: #f1f5f9;
      --bg: #f6f9fe;
      --card: #ffffff;
      --card-soft: #fbfdff;
      --warning: #f59e0b;
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 26px;
      --radius-xl: 32px;
      --shadow: 0 10px 30px rgba(15, 23, 42, .06);
      --shadow-hover: 0 18px 45px rgba(15, 23, 42, .10);
      --sidebar: 236px;
      --ease: .22s ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      min-height: 100vh;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--slate-950);
      background:
        radial-gradient(circle at 85% 8%, rgba(37, 99, 235, .10), transparent 32%),
        radial-gradient(circle at 15% 90%, rgba(14, 165, 233, .10), transparent 30%),
        var(--bg);
      line-height: 1.75;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img, svg {
      max-width: 100%;
      display: block;
    }

    button, input, textarea, select {
      font: inherit;
    }

    button {
      border: 0;
      cursor: pointer;
      background: none;
    }

    :focus-visible {
      outline: 3px solid rgba(37, 99, 235, .28);
      outline-offset: 3px;
      border-radius: 10px;
    }

    .app-sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: var(--sidebar);
      background: rgba(255, 255, 255, .92);
      border-right: 1px solid var(--slate-200);
      padding: 24px 18px;
      display: flex;
      flex-direction: column;
      gap: 28px;
      z-index: 40;
      backdrop-filter: blur(16px);
      box-shadow: 8px 0 30px rgba(15, 23, 42, .035);
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 8px 14px;
      border-bottom: 1px solid var(--slate-200);
      transition: transform var(--ease), opacity var(--ease);
    }

    .brand:hover {
      transform: translateY(-1px);
      opacity: .92;
    }

    .brand-mark {
      width: 44px;
      height: 44px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #fff;
      font-weight: 800;
      background:
        linear-gradient(135deg, var(--primary), var(--cyan));
      box-shadow: 0 12px 28px rgba(37, 99, 235, .22);
      flex: 0 0 auto;
    }

    .brand-text {
      min-width: 0;
      display: grid;
      gap: 2px;
    }

    .brand-title {
      font-size: 15px;
      font-weight: 800;
      color: var(--slate-950);
      line-height: 1.25;
    }

    .brand-sub {
      font-size: 12px;
      color: var(--slate-500);
      font-weight: 600;
    }

    .side-label {
      font-size: 12px;
      color: var(--slate-500);
      font-weight: 700;
      letter-spacing: .08em;
      margin: 0 8px 10px;
    }

    .side-nav {
      display: grid;
      gap: 8px;
    }

    .nav-link {
      position: relative;
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 44px;
      padding: 11px 12px 11px 14px;
      color: var(--slate-600);
      border-radius: 14px;
      font-size: 14px;
      font-weight: 700;
      transition: background var(--ease), color var(--ease), transform var(--ease);
    }

    .nav-link .ico {
      width: 22px;
      text-align: center;
      color: var(--primary);
      font-weight: 800;
    }

    .nav-link:hover {
      background: var(--primary-weak);
      color: var(--primary-dark);
      transform: translateX(2px);
    }

    .nav-link.active {
      background: var(--primary-weak);
      color: var(--primary-dark);
      box-shadow: inset 3px 0 0 var(--primary);
    }

    .sidebar-note {
      margin-top: auto;
      padding: 16px;
      border: 1px solid var(--slate-200);
      border-radius: 18px;
      background: linear-gradient(180deg, #ffffff, #f8fbff);
      color: var(--slate-600);
      font-size: 13px;
      line-height: 1.7;
    }

    .sidebar-note strong {
      color: var(--slate-950);
    }

    .back-top {
      display: inline-flex;
      margin-top: 12px;
      color: var(--primary);
      font-weight: 800;
      transition: transform var(--ease), color var(--ease);
    }

    .back-top:hover {
      color: var(--primary-dark);
      transform: translateY(-1px);
    }

    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 60;
      height: 64px;
      padding: 0 18px;
      align-items: center;
      justify-content: space-between;
      background: rgba(255, 255, 255, .94);
      border-bottom: 1px solid var(--slate-200);
      backdrop-filter: blur(16px);
    }

    .mobile-header .brand {
      border: 0;
      padding: 0;
      max-width: calc(100vw - 90px);
    }

    .menu-btn {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      background: var(--primary-weak);
      color: var(--primary);
      display: grid;
      place-items: center;
      font-size: 22px;
      font-weight: 800;
      transition: background var(--ease), transform var(--ease);
    }

    .menu-btn:hover {
      background: var(--primary-soft);
      transform: translateY(-1px);
    }

    .drawer-mask {
      position: fixed;
      inset: 0;
      background: rgba(15, 23, 42, .28);
      opacity: 0;
      visibility: hidden;
      z-index: 70;
      transition: opacity var(--ease), visibility var(--ease);
    }

    .drawer {
      position: fixed;
      top: 0;
      left: 0;
      width: min(82vw, 320px);
      height: 100vh;
      background: #fff;
      padding: 22px 18px;
      z-index: 80;
      transform: translateX(-105%);
      transition: transform var(--ease);
      box-shadow: 18px 0 45px rgba(15, 23, 42, .16);
      overflow-y: auto;
    }

    body.menu-open {
      overflow: hidden;
    }

    body.menu-open .drawer-mask {
      opacity: 1;
      visibility: visible;
    }

    body.menu-open .drawer {
      transform: translateX(0);
    }

    .drawer-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 22px;
    }

    .drawer-close {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      color: var(--slate-700);
      background: var(--slate-100);
      font-size: 22px;
    }

    .page {
      margin-left: var(--sidebar);
      min-height: 100vh;
    }

    .container {
      width: min(1180px, calc(100% - 80px));
      margin: 0 auto;
    }

    main {
      padding: 40px 0 0;
    }

    .section {
      margin: 78px 0;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      color: var(--slate-500);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .breadcrumb a {
      color: var(--primary);
    }

    .breadcrumb a:hover {
      color: var(--primary-dark);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .hero {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-xl);
      padding: 36px;
      background:
        linear-gradient(135deg, rgba(239, 246, 255, .95), rgba(255, 255, 255, .98)),
        radial-gradient(circle at 92% 12%, rgba(14, 165, 233, .18), transparent 34%);
      border: 1px solid rgba(191, 219, 254, .9);
      box-shadow: var(--shadow);
    }

    .hero::before {
      content: "";
      position: absolute;
      right: -90px;
      top: -120px;
      width: 320px;
      height: 320px;
      border-radius: 999px;
      background: rgba(37, 99, 235, .10);
    }

    .hero-grid {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1.48fr) minmax(280px, .72fr);
      gap: 30px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: #fff;
      color: var(--primary-dark);
      border: 1px solid var(--primary-soft);
      font-size: 13px;
      font-weight: 800;
      box-shadow: 0 8px 20px rgba(37, 99, 235, .07);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--cyan);
      box-shadow: 0 0 0 5px rgba(14, 165, 233, .12);
    }

    h1 {
      margin-top: 18px;
      font-size: clamp(32px, 4vw, 48px);
      line-height: 1.16;
      letter-spacing: -.04em;
      color: var(--slate-950);
      font-weight: 850;
    }

    .hero-lead {
      margin-top: 18px;
      max-width: 760px;
      color: var(--slate-600);
      font-size: 17px;
      line-height: 1.9;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 26px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 800;
      transition: transform var(--ease), background var(--ease), color var(--ease), border-color var(--ease), box-shadow var(--ease);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 12px 28px rgba(37, 99, 235, .22);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 16px 34px rgba(37, 99, 235, .28);
    }

    .btn-secondary {
      color: var(--primary-dark);
      background: #fff;
      border: 1px solid var(--primary-soft);
    }

    .btn-secondary:hover {
      background: var(--primary-weak);
      transform: translateY(-2px);
      border-color: #bfdbfe;
    }

    .btn-text {
      color: var(--primary);
      padding: 8px 0;
      min-height: auto;
    }

    .btn-text:hover {
      color: var(--primary-dark);
      transform: translateX(3px);
    }

    .hero-panel {
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--slate-200);
      box-shadow: var(--shadow);
      padding: 20px;
      display: grid;
      gap: 14px;
    }

    .metric-card {
      border-radius: 18px;
      padding: 18px;
      background: linear-gradient(135deg, #ffffff, #f8fbff);
      border: 1px solid var(--slate-200);
    }

    .metric-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--slate-500);
      font-size: 13px;
      font-weight: 700;
    }

    .metric-num {
      margin-top: 8px;
      color: var(--slate-950);
      font-size: 32px;
      line-height: 1;
      font-weight: 850;
    }

    .metric-note {
      margin-top: 8px;
      color: var(--slate-500);
      font-size: 13px;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--primary-weak);
      color: var(--primary-dark);
      border: 1px solid var(--primary-soft);
      font-size: 12px;
      font-weight: 800;
    }

    .badge.gray {
      background: var(--slate-100);
      color: var(--slate-600);
      border-color: var(--slate-200);
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      align-items: end;
      margin-bottom: 24px;
    }

    .section-kicker {
      color: var(--primary);
      font-size: 13px;
      font-weight: 850;
      letter-spacing: .08em;
      margin-bottom: 8px;
    }

    h2 {
      font-size: clamp(26px, 3vw, 34px);
      line-height: 1.25;
      letter-spacing: -.03em;
      color: var(--slate-950);
      font-weight: 850;
    }

    .section-desc {
      max-width: 620px;
      color: var(--slate-600);
      font-size: 15px;
      line-height: 1.85;
    }

    .filter-bar {
      display: flex;
      gap: 10px;
      overflow-x: auto;
      padding: 8px 4px 12px;
      scrollbar-width: none;
    }

    .filter-bar::-webkit-scrollbar {
      display: none;
    }

    .pill {
      flex: 0 0 auto;
      padding: 9px 14px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--slate-200);
      color: var(--slate-600);
      font-size: 14px;
      font-weight: 800;
      transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
    }

    .pill:hover {
      transform: translateY(-1px);
      border-color: #bfdbfe;
      color: var(--primary-dark);
      background: var(--primary-weak);
    }

    .pill.active {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      box-shadow: 0 10px 24px rgba(37, 99, 235, .18);
    }

    .index-layout {
      display: grid;
      grid-template-columns: minmax(240px, .36fr) minmax(0, .64fr);
      gap: 22px;
      align-items: start;
    }

    .group-card {
      position: sticky;
      top: 26px;
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: 24px;
      box-shadow: var(--shadow);
      padding: 18px;
    }

    .group-title {
      font-size: 16px;
      font-weight: 850;
      margin-bottom: 12px;
      color: var(--slate-950);
    }

    .group-list {
      display: grid;
      gap: 8px;
    }

    .group-link {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 10px;
      padding: 12px;
      border-radius: 14px;
      color: var(--slate-600);
      font-weight: 750;
      font-size: 14px;
      transition: background var(--ease), color var(--ease), transform var(--ease);
    }

    .group-link span:last-child {
      color: var(--slate-500);
      font-size: 12px;
      font-weight: 800;
    }

    .group-link:hover,
    .group-link.current {
      background: var(--primary-weak);
      color: var(--primary-dark);
      transform: translateX(2px);
    }

    .entry-stack {
      display: grid;
      gap: 14px;
    }

    .entry-card {
      position: relative;
      overflow: hidden;
      padding: 22px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--slate-200);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .entry-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: #bfdbfe;
    }

    .entry-card.featured {
      border-left: 5px solid var(--primary);
      padding-left: 24px;
      background:
        linear-gradient(90deg, rgba(239, 246, 255, .92), rgba(255, 255, 255, 1) 38%),
        #fff;
    }

    .entry-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      margin-bottom: 10px;
    }

    h3 {
      color: var(--slate-950);
      font-size: 20px;
      line-height: 1.35;
      font-weight: 850;
    }

    .entry-card p {
      margin-top: 8px;
      color: var(--slate-600);
      font-size: 15px;
      line-height: 1.85;
    }

    .entry-foot {
      margin-top: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
    }

    .date {
      color: var(--slate-500);
      font-size: 13px;
      font-weight: 700;
    }

    .hint-card {
      padding: 20px 22px;
      border-radius: 22px;
      background: linear-gradient(135deg, #eff6ff, #ffffff);
      border: 1px dashed #bfdbfe;
      color: var(--slate-600);
      box-shadow: 0 10px 26px rgba(37, 99, 235, .06);
    }

    .hint-card strong {
      display: block;
      color: var(--slate-950);
      font-size: 17px;
      margin-bottom: 6px;
    }

    .dark-panel {
      overflow: hidden;
      position: relative;
      border-radius: 30px;
      padding: 32px;
      background:
        radial-gradient(circle at 85% 15%, rgba(14, 165, 233, .22), transparent 34%),
        linear-gradient(135deg, #0f172a, #1e3a8a);
      color: #fff;
      box-shadow: 0 24px 60px rgba(15, 23, 42, .18);
    }

    .dark-panel::after {
      content: "";
      position: absolute;
      inset: auto -80px -120px auto;
      width: 280px;
      height: 280px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .08);
    }

    .dark-grid {
      position: relative;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 28px;
      align-items: center;
    }

    .dark-panel h2,
    .dark-panel .section-kicker {
      color: #fff;
    }

    .dark-panel p {
      color: rgba(255, 255, 255, .78);
      margin-top: 12px;
    }

    .signal-list {
      display: grid;
      gap: 12px;
    }

    .signal {
      padding: 14px 16px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .10);
      border: 1px solid rgba(255, 255, 255, .16);
    }

    .signal-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: rgba(255, 255, 255, .86);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 9px;
    }

    .bar {
      height: 9px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .16);
      overflow: hidden;
    }

    .bar span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, #93c5fd, #22d3ee);
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .step-card {
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: 22px;
      padding: 22px;
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .step-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: #bfdbfe;
    }

    .step-num {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      background: var(--primary-weak);
      color: var(--primary);
      font-weight: 850;
      margin-bottom: 14px;
    }

    .step-card p {
      margin-top: 8px;
      color: var(--slate-600);
      font-size: 14px;
      line-height: 1.75;
    }

    .faq-list {
      display: grid;
      gap: 12px;
      max-width: 920px;
    }

    details {
      background: #fff;
      border: 1px solid var(--slate-200);
      border-radius: 20px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    details[open] {
      border-color: #bfdbfe;
    }

    summary {
      cursor: pointer;
      list-style: none;
      padding: 18px 22px;
      color: var(--slate-950);
      font-weight: 850;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      content: "+";
      width: 28px;
      height: 28px;
      border-radius: 999px;
      background: var(--primary-weak);
      color: var(--primary);
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      font-weight: 900;
      transition: transform var(--ease), background var(--ease);
    }

    details[open] summary::after {
      content: "−";
      background: var(--primary);
      color: #fff;
      transform: rotate(180deg);
    }

    .faq-answer {
      padding: 0 22px 20px;
      color: var(--slate-600);
      font-size: 15px;
      line-height: 1.85;
    }

    .cta {
      margin: 80px 0 46px;
      border-radius: 30px;
      padding: 30px;
      background:
        linear-gradient(135deg, rgba(219, 234, 254, .95), rgba(255, 255, 255, .95));
      border: 1px solid #bfdbfe;
      box-shadow: var(--shadow);
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 22px;
    }

    .cta p {
      color: var(--slate-600);
      margin-top: 8px;
      max-width: 680px;
    }

    .cta-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .footer {
      padding: 0 0 38px;
    }

    .footer-card {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 24px;
      border-radius: 28px;
      padding: 28px;
      background: #fff;
      border: 1px solid var(--slate-200);
      box-shadow: var(--shadow);
    }

    .footer h2 {
      font-size: 22px;
      margin-bottom: 8px;
    }

    .footer p {
      color: var(--slate-600);
      max-width: 620px;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 10px 16px;
      margin-bottom: 14px;
    }

    .footer-links a {
      color: var(--slate-600);
      font-size: 14px;
      font-weight: 800;
      transition: color var(--ease);
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .copyright {
      text-align: right;
      color: var(--slate-500);
      font-size: 13px;
      font-weight: 700;
    }

    @media (max-width: 1120px) {
      :root {
        --sidebar: 216px;
      }

      .container {
        width: min(100% - 52px, 1080px);
      }

      .hero-grid,
      .dark-grid {
        grid-template-columns: 1fr;
      }

      .hero-panel {
        max-width: 520px;
      }

      .steps {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 900px) {
      .app-sidebar {
        display: none;
      }

      .mobile-header {
        display: flex;
      }

      .page {
        margin-left: 0;
      }

      main {
        padding-top: 24px;
      }

      .container {
        width: min(100% - 40px, 760px);
      }

      .index-layout {
        grid-template-columns: 1fr;
      }

      .group-card {
        position: static;
      }

      .group-list {
        display: flex;
        overflow-x: auto;
        padding-bottom: 4px;
      }

      .group-link {
        min-width: 170px;
      }

      .section-head {
        display: grid;
      }

      .cta,
      .footer-card {
        grid-template-columns: 1fr;
      }

      .cta-actions,
      .footer-links {
        justify-content: flex-start;
      }

      .copyright {
        text-align: left;
      }
    }

    @media (max-width: 640px) {
      .container {
        width: min(100% - 32px, 560px);
      }

      .hero {
        padding: 24px;
        border-radius: 24px;
      }

      .hero-actions,
      .cta-actions {
        display: grid;
        grid-template-columns: 1fr;
      }

      .btn {
        width: 100%;
      }

      .hero-panel {
        padding: 16px;
      }

      .section {
        margin: 58px 0;
      }

      .entry-card,
      .dark-panel,
      .cta,
      .footer-card {
        padding: 22px;
        border-radius: 22px;
      }

      .steps {
        grid-template-columns: 1fr;
      }

      .entry-foot {
        align-items: flex-start;
      }

      .brand-title {
        font-size: 13px;
      }

      .brand-mark {
        width: 40px;
        height: 40px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        transition: none !important;
        scroll-behavior: auto !important;
      }
    }