/* roulang page: index */
:root{
      --bg-0:#06111F;
      --bg-1:#081827;
      --bg-2:#0B1020;
      --card:rgba(15,23,42,.62);
      --card-strong:rgba(8,18,32,.78);
      --line:rgba(148,163,184,.18);
      --line-strong:rgba(34,211,238,.42);
      --text:#F8FAFC;
      --muted:#A7B3C7;
      --weak:#64748B;
      --cyan:#22D3EE;
      --cyan-2:#18C7D8;
      --violet:#8B5CF6;
      --rose:#E879F9;
      --mint:#34D399;
      --radius:24px;
      --radius-lg:32px;
      --shadow:0 24px 80px rgba(0,0,0,.38);
      --glow:0 0 34px rgba(34,211,238,.18);
      --container:1200px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
      line-height:1.75;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 10%, rgba(34,211,238,.18), transparent 28%),
        radial-gradient(circle at 88% 14%, rgba(139,92,246,.18), transparent 28%),
        radial-gradient(circle at 72% 66%, rgba(232,121,249,.10), transparent 24%),
        linear-gradient(180deg,#06111F 0%,#081827 46%,#060B16 100%);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-2;
      background-image:
        linear-gradient(rgba(148,163,184,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,.06) 1px, transparent 1px);
      background-size:38px 38px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.88), rgba(0,0,0,.18));
    }
    body:after{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-1;
      background:
        radial-gradient(circle at 30% 24%, rgba(34,211,238,.10), transparent 12%),
        radial-gradient(circle at 58% 34%, rgba(52,211,153,.08), transparent 10%),
        radial-gradient(circle at 80% 82%, rgba(139,92,246,.12), transparent 18%);
      filter:blur(2px);
    }

    a{color:inherit;text-decoration:none}
    button,input,textarea,select{font:inherit}
    button{border:0;cursor:pointer}
    img,svg{max-width:100%;display:block}

    .site-container{
      width:min(var(--container), calc(100% - 40px));
      margin-inline:auto;
    }
    .topbar{
      min-height:36px;
      background:rgba(3,10,22,.72);
      border-bottom:1px solid rgba(34,211,238,.16);
      color:#B6C5DA;
      backdrop-filter:blur(18px);
    }
    .topbar-link{
      color:#DDFBFF;
      transition:.25s ease;
      border:1px solid rgba(148,163,184,.16);
      background:rgba(148,163,184,.06);
      border-radius:999px;
      padding:4px 12px;
    }
    .topbar-link:hover{border-color:rgba(34,211,238,.48);color:white;background:rgba(34,211,238,.10)}
    .main-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(6,17,31,.74);
      backdrop-filter:blur(22px);
      border-bottom:1px solid rgba(148,163,184,.16);
      box-shadow:0 16px 50px rgba(0,0,0,.18);
    }
    .brand-mark{
      width:44px;height:44px;border-radius:16px;
      background:linear-gradient(135deg,rgba(34,211,238,.96),rgba(139,92,246,.94));
      box-shadow:0 0 28px rgba(34,211,238,.28);
      position:relative;
      overflow:hidden;
      flex:0 0 auto;
    }
    .brand-mark:before{
      content:"";
      position:absolute;inset:9px;
      background:
        linear-gradient(90deg,rgba(255,255,255,.80) 0 42%,transparent 42% 58%,rgba(255,255,255,.70) 58% 100%),
        linear-gradient(rgba(255,255,255,.72) 0 42%,transparent 42% 58%,rgba(255,255,255,.74) 58% 100%);
      background-blend-mode:screen;
      border-radius:8px;
      opacity:.9;
    }
    .brand-mark:after{
      content:"";
      position:absolute;width:70px;height:16px;left:-14px;top:14px;
      background:linear-gradient(90deg,transparent,rgba(255,255,255,.72),transparent);
      transform:rotate(-28deg);
      animation:shine 4.8s ease-in-out infinite;
    }
    @keyframes shine{0%,45%{transform:translateX(-65px) rotate(-28deg)}70%,100%{transform:translateX(72px) rotate(-28deg)}}

    .nav-link{
      position:relative;
      color:#C7D2E4;
      font-size:15px;
      transition:.25s ease;
      padding:10px 3px;
      white-space:nowrap;
    }
    .nav-link:after{
      content:"";
      position:absolute;left:10%;right:10%;bottom:2px;height:2px;
      transform:scaleX(0);
      transform-origin:center;
      background:linear-gradient(90deg,var(--cyan),var(--rose));
      border-radius:999px;
      box-shadow:0 0 12px rgba(34,211,238,.55);
      transition:.25s ease;
    }
    .nav-link:hover,.nav-link.active{color:#fff}
    .nav-link:hover:after,.nav-link.active:after{transform:scaleX(1)}
    .mobile-panel{
      display:none;
      border-top:1px solid rgba(148,163,184,.14);
      background:rgba(8,18,32,.88);
      backdrop-filter:blur(20px);
    }
    .mobile-panel.open{display:block}
    .hamburger{
      width:44px;height:44px;border-radius:14px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(15,23,42,.54);
      color:white;
      transition:.25s ease;
    }
    .hamburger:hover{border-color:rgba(34,211,238,.48);box-shadow:var(--glow)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      min-height:48px;
      padding:13px 22px;
      border-radius:999px;
      font-weight:700;
      transition:.25s ease;
      line-height:1.1;
      user-select:none;
    }
    .btn-primary{
      color:white;
      background:linear-gradient(135deg,var(--cyan),var(--violet));
      box-shadow:0 16px 38px rgba(34,211,238,.20),0 0 0 1px rgba(255,255,255,.10) inset;
    }
    .btn-primary:hover{transform:translateY(-3px);filter:brightness(1.08);box-shadow:0 22px 54px rgba(34,211,238,.28)}
    .btn-secondary{
      color:#EAF8FF;
      background:rgba(15,23,42,.50);
      border:1px solid rgba(148,163,184,.24);
    }
    .btn-secondary:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.52);background:rgba(34,211,238,.08)}
    .btn:focus-visible,.nav-link:focus-visible,.topbar-link:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:3px solid rgba(34,211,238,.34);
      outline-offset:3px;
    }

    .section{padding:104px 0}
    .section-tight{padding:74px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      color:#DFFBFF;
      background:rgba(34,211,238,.08);
      border:1px solid rgba(34,211,238,.22);
      border-radius:999px;
      padding:8px 14px;
      font-size:14px;
      font-weight:700;
      box-shadow:0 0 24px rgba(34,211,238,.08) inset;
    }
    .eyebrow:before{
      content:"";
      width:8px;height:8px;border-radius:999px;
      background:var(--mint);
      box-shadow:0 0 15px rgba(52,211,153,.8);
    }
    .gradient-text{
      background:linear-gradient(90deg,#fff 0%,#BDF5FF 35%,#D8C8FF 68%,#F7C7FF 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .lead{color:#B9C6D8;font-size:18px;line-height:1.9}
    .muted{color:var(--muted)}
    .glass{
      background:var(--card);
      border:1px solid var(--line);
      border-radius:var(--radius);
      backdrop-filter:blur(18px);
      box-shadow:var(--shadow);
      transition:.25s ease;
    }
    .glass:hover{
      transform:translateY(-4px);
      border-color:var(--line-strong);
      box-shadow:0 26px 80px rgba(0,0,0,.42),0 0 34px rgba(34,211,238,.13);
    }
    .tag{
      display:inline-flex;align-items:center;
      border-radius:999px;
      padding:7px 11px;
      font-size:13px;
      color:#CFF9FF;
      background:rgba(34,211,238,.08);
      border:1px solid rgba(34,211,238,.18);
      transition:.25s ease;
    }
    .tag:hover{transform:translateY(-2px);background:rgba(34,211,238,.14);border-color:rgba(34,211,238,.38)}

    .hero{
      position:relative;
      min-height:720px;
      display:flex;
      align-items:center;
      padding:74px 0 86px;
      overflow:hidden;
    }
    .hero-orb{
      position:absolute;
      width:420px;height:420px;border-radius:999px;
      background:radial-gradient(circle, rgba(34,211,238,.18), transparent 66%);
      filter:blur(4px);
      right:4%;top:14%;
      pointer-events:none;
    }
    .dashboard{
      position:relative;
      min-height:520px;
      border-radius:34px;
      background:
        linear-gradient(135deg,rgba(15,23,42,.72),rgba(8,18,32,.84)),
        radial-gradient(circle at 20% 20%,rgba(34,211,238,.24),transparent 26%);
      border:1px solid rgba(148,163,184,.18);
      box-shadow:0 32px 100px rgba(0,0,0,.44),0 0 60px rgba(34,211,238,.10);
      overflow:hidden;
    }
    .dashboard:before{
      content:"";
      position:absolute;inset:0;
      background-image:
        linear-gradient(rgba(34,211,238,.08) 1px, transparent 1px),
        linear-gradient(90deg,rgba(34,211,238,.08) 1px, transparent 1px);
      background-size:28px 28px;
      opacity:.6;
    }
    .node{
      position:absolute;
      width:10px;height:10px;border-radius:50%;
      background:#DFFBFF;
      box-shadow:0 0 18px rgba(34,211,238,.85);
    }
    .node.n1{left:18%;top:22%}.node.n2{left:63%;top:18%}.node.n3{left:78%;top:52%}.node.n4{left:35%;top:74%}.node.n5{left:16%;top:60%}
    .dash-line{
      position:absolute;height:1px;background:linear-gradient(90deg,transparent,rgba(34,211,238,.52),transparent);
      transform-origin:left center;
      opacity:.8;
    }
    .dash-line.l1{left:20%;top:24%;width:260px;transform:rotate(-4deg)}
    .dash-line.l2{left:64%;top:21%;width:190px;transform:rotate(58deg)}
    .dash-line.l3{left:36%;top:73%;width:260px;transform:rotate(-22deg)}
    .float-card{
      position:absolute;
      width:210px;
      padding:18px;
      border-radius:22px;
      background:rgba(15,23,42,.70);
      border:1px solid rgba(148,163,184,.18);
      backdrop-filter:blur(16px);
      box-shadow:0 20px 60px rgba(0,0,0,.34);
      animation:floaty 6s ease-in-out infinite;
    }
    .float-card:nth-child(odd){animation-delay:-2s}
    @keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
    .bar{
      height:8px;border-radius:999px;background:rgba(148,163,184,.16);overflow:hidden;
    }
    .bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--violet))}
    .pain-card{
      position:relative;
      padding:26px;
      min-height:168px;
      overflow:hidden;
    }
    .pain-card:before{
      content:"";
      position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:999px;
      background:linear-gradient(var(--cyan),var(--rose));
      box-shadow:0 0 18px rgba(34,211,238,.55);
    }
    .step-card{
      display:grid;
      grid-template-columns:52px 1fr;
      gap:16px;
      padding:22px;
      border-radius:22px;
      border:1px solid rgba(148,163,184,.16);
      background:rgba(15,23,42,.42);
      transition:.25s ease;
    }
    .step-card:hover{border-color:rgba(34,211,238,.40);background:rgba(34,211,238,.06);transform:translateX(4px)}
    .step-icon,.metric-icon{
      display:grid;place-items:center;
      width:52px;height:52px;border-radius:18px;
      background:linear-gradient(135deg,rgba(34,211,238,.18),rgba(139,92,246,.18));
      border:1px solid rgba(34,211,238,.20);
      color:#E8FBFF;
      font-weight:900;
    }
    .metric-card{
      padding:30px;
      border-radius:28px;
      background:linear-gradient(145deg,rgba(15,23,42,.66),rgba(8,18,32,.86));
      border:1px solid rgba(148,163,184,.16);
      transition:.25s ease;
    }
    .metric-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.42)}
    .metric-number{
      font-size:44px;
      line-height:1;
      font-weight:900;
      letter-spacing:-.04em;
      color:white;
    }
    .category-card{
      position:relative;
      overflow:hidden;
      padding:32px;
      border-radius:30px;
      min-height:260px;
      background:rgba(15,23,42,.62);
      border:1px solid rgba(148,163,184,.18);
      transition:.25s ease;
    }
    .category-card:before{
      content:"";
      position:absolute;inset:auto -60px -80px auto;
      width:240px;height:240px;border-radius:999px;
      background:radial-gradient(circle,rgba(34,211,238,.18),transparent 66%);
    }
    .category-card:hover{transform:translateY(-5px);border-color:rgba(34,211,238,.46);box-shadow:0 28px 80px rgba(0,0,0,.38),0 0 40px rgba(34,211,238,.12)}
    .quote-avatar{
      width:48px;height:48px;border-radius:18px;
      background:
        radial-gradient(circle at 34% 28%,#fff 0 8%,transparent 9%),
        linear-gradient(135deg,rgba(34,211,238,.78),rgba(232,121,249,.72));
      box-shadow:0 0 24px rgba(139,92,246,.20);
    }
    .faq-item{
      padding:24px 26px;
      border-radius:24px;
      border:1px solid rgba(148,163,184,.16);
      background:rgba(15,23,42,.54);
      transition:.25s ease;
    }
    .faq-item:hover{border-color:rgba(34,211,238,.38);background:rgba(15,23,42,.70)}
    .cta-box{
      position:relative;
      overflow:hidden;
      border-radius:36px;
      padding:56px;
      background:
        radial-gradient(circle at 20% 10%,rgba(34,211,238,.24),transparent 30%),
        radial-gradient(circle at 80% 80%,rgba(139,92,246,.22),transparent 32%),
        linear-gradient(135deg,rgba(15,23,42,.88),rgba(6,17,31,.94));
      border:1px solid rgba(34,211,238,.22);
      box-shadow:0 30px 90px rgba(0,0,0,.42);
    }
    .cta-box:before{
      content:"";
      position:absolute;inset:0;
      background-image:linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px, transparent 1px);
      background-size:34px 34px;
      opacity:.45;
      pointer-events:none;
    }
    .footer{
      background:rgba(3,10,22,.86);
      border-top:1px solid rgba(148,163,184,.14);
      color:#AAB7CA;
    }
    .footer a{transition:.25s ease}
    .footer a:hover{color:#fff}
    .footer-title{color:white;font-weight:800;margin-bottom:14px}
    .footer-divider{border-top:1px solid rgba(148,163,184,.14)}

    .form-input{
      width:100%;
      border-radius:18px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(8,18,32,.66);
      color:white;
      padding:14px 16px;
      transition:.25s ease;
    }
    .form-input::placeholder{color:#73839A}
    .form-input:focus{border-color:rgba(34,211,238,.48);box-shadow:0 0 0 4px rgba(34,211,238,.10)}

    @media (max-width:1024px){
      .hero{min-height:auto;padding:62px 0 72px}
      .dashboard{min-height:460px;margin-top:32px}
      .section{padding:82px 0}
      .section-tight{padding:64px 0}
      .desktop-nav{display:none}
      .desktop-cta{display:none}
    }
    @media (min-width:1025px){
      .mobile-only{display:none!important}
    }
    @media (max-width:768px){
      .site-container{width:min(100% - 28px, var(--container))}
      .topbar .hide-sm{display:none}
      .brand-mark{width:40px;height:40px;border-radius:14px}
      .hero{padding:48px 0 62px}
      .hero h1{font-size:40px!important}
      .section{padding:66px 0}
      .section-tight{padding:54px 0}
      .lead{font-size:16px}
      .dashboard{min-height:420px;border-radius:26px}
      .float-card{width:185px;padding:15px}
      .float-card.fc2{right:14px!important}
      .float-card.fc3{left:14px!important}
      .cta-box{padding:34px 22px;border-radius:28px}
      .metric-number{font-size:38px}
      .btn{width:100%}
    }
    @media (max-width:520px){
      .hero h1{font-size:34px!important}
      .topbar{font-size:12px}
      .dashboard{min-height:390px}
      .float-card{width:162px}
      .float-card.fc1{left:12px!important;top:30px!important}
      .float-card.fc2{top:138px!important}
      .float-card.fc3{bottom:30px!important}
      .category-card,.metric-card,.pain-card{padding:24px}
    }

/* roulang page: category2 */
:root{
      --bg-0:#06111F;
      --bg-1:#081827;
      --bg-2:#0B1020;
      --card:rgba(15,23,42,.62);
      --card-2:rgba(8,18,32,.72);
      --line:rgba(148,163,184,.18);
      --line-2:rgba(34,211,238,.32);
      --text:#F8FAFC;
      --muted:#A7B3C7;
      --muted-2:#94A3B8;
      --cyan:#22D3EE;
      --cyan-2:#18C7D8;
      --violet:#7C3AED;
      --pink:#E879F9;
      --green:#34D399;
      --shadow:0 24px 80px rgba(2,8,23,.45);
      --radius:24px;
      --radius-lg:32px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 20%, rgba(34,211,238,.13), transparent 24%),
        radial-gradient(circle at 85% 12%, rgba(124,58,237,.16), transparent 22%),
        radial-gradient(circle at 68% 88%, rgba(232,121,249,.10), transparent 24%),
        linear-gradient(180deg, #07111f 0%, #081827 42%, #06111f 100%);
      min-height:100vh;
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(148,163,184,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,.06) 1px, transparent 1px);
      background-size:56px 56px;
      mask-image:linear-gradient(180deg, rgba(0,0,0,.48), rgba(0,0,0,.10));
      opacity:.35;
    }
    body::after{
      content:"";
      position:fixed;
      inset:-20%;
      pointer-events:none;
      background:
        radial-gradient(circle at 20% 20%, rgba(34,211,238,.06), transparent 22%),
        radial-gradient(circle at 80% 30%, rgba(124,58,237,.06), transparent 20%),
        radial-gradient(circle at 60% 80%, rgba(232,121,249,.05), transparent 18%);
      filter:blur(26px);
      opacity:.7;
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    button,input,textarea,select{font:inherit}
    img{max-width:100%;display:block}
    ::selection{background:rgba(34,211,238,.28);color:#fff}
    .site-container{
      width:min(calc(100% - 32px), var(--container));
      margin-inline:auto;
    }
    .topbar{
      background:rgba(4,10,18,.76);
      border-bottom:1px solid rgba(148,163,184,.14);
      backdrop-filter:blur(14px);
      position:relative;
      z-index:50;
    }
    .topbar-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      height:28px;
      padding:0 12px;
      border-radius:999px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(15,23,42,.34);
      color:#d9f6ff;
      transition:all .24s ease;
      white-space:nowrap;
    }
    .topbar-link:hover{border-color:rgba(34,211,238,.42);background:rgba(34,211,238,.10);transform:translateY(-1px)}
    .main-header{
      position:sticky;
      top:0;
      z-index:40;
      background:rgba(8,18,32,.72);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(148,163,184,.14);
      box-shadow:0 8px 30px rgba(2,6,23,.18);
    }
    .brand-mark{
      width:44px;height:44px;border-radius:16px;display:inline-block;position:relative;flex:none;
      background:
        linear-gradient(135deg, rgba(34,211,238,.20), rgba(124,58,237,.22)),
        linear-gradient(180deg, rgba(15,23,42,.92), rgba(8,18,32,.92));
      border:1px solid rgba(148,163,184,.18);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.06), 0 12px 30px rgba(8,15,30,.45);
      overflow:hidden;
    }
    .brand-mark::before,
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:10px;
      border-radius:12px;
      background:
        linear-gradient(135deg, rgba(34,211,238,.95), rgba(124,58,237,.90));
      clip-path:polygon(0 0, 40% 0, 40% 40%, 100% 40%, 100% 100%, 60% 100%, 60% 60%, 0 60%);
      opacity:.92;
      filter:drop-shadow(0 0 8px rgba(34,211,238,.25));
    }
    .brand-mark::after{
      inset:auto;
      width:8px;height:8px;border-radius:999px;
      right:10px;top:10px;
      background:rgba(240,171,252,.96);
      clip-path:none;
      box-shadow:0 0 16px rgba(240,171,252,.45), -18px 16px 0 rgba(34,211,238,.85), -10px 30px 0 rgba(52,211,153,.78);
    }
    .nav-link{
      position:relative;
      color:rgba(248,250,252,.84);
      font-size:15px;
      font-weight:600;
      padding:10px 0;
      transition:color .22s ease, opacity .22s ease;
      white-space:nowrap;
    }
    .nav-link::after{
      content:"";
      position:absolute;
      left:0;
      bottom:0;
      width:100%;
      height:2px;
      border-radius:999px;
      background:linear-gradient(90deg, var(--cyan), var(--violet));
      transform:scaleX(0);
      transform-origin:left center;
      transition:transform .24s ease;
      box-shadow:0 0 14px rgba(34,211,238,.35);
    }
    .nav-link:hover,.nav-link:focus-visible{color:#fff}
    .nav-link:hover::after,.nav-link:focus-visible::after,.nav-link.active::after{transform:scaleX(1)}
    .nav-link.active{color:#fff}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.5rem;
      border-radius:999px;
      font-weight:700;
      border:1px solid transparent;
      transition:all .24s ease;
      will-change:transform;
      cursor:pointer;
      text-decoration:none;
      white-space:nowrap;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn:active{transform:translateY(0)}
    .btn:focus-visible,
    .nav-link:focus-visible,
    .topbar-link:focus-visible,
    summary:focus-visible{
      outline:none;
      box-shadow:0 0 0 4px rgba(34,211,238,.16);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg, rgba(34,211,238,.95), rgba(124,58,237,.95));
      box-shadow:0 14px 34px rgba(34,211,238,.18), 0 14px 34px rgba(124,58,237,.14);
    }
    .btn-primary:hover{box-shadow:0 16px 38px rgba(34,211,238,.22), 0 18px 42px rgba(124,58,237,.18)}
    .btn-secondary{
      color:#dbeafe;
      background:rgba(15,23,42,.48);
      border-color:rgba(148,163,184,.20);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    }
    .btn-secondary:hover{
      border-color:rgba(34,211,238,.40);
      background:rgba(34,211,238,.08);
      color:#fff;
    }
    .glass-card{
      background:linear-gradient(180deg, rgba(15,23,42,.70), rgba(8,18,32,.58));
      border:1px solid rgba(148,163,184,.16);
      box-shadow:var(--shadow);
      backdrop-filter:blur(18px);
      border-radius:var(--radius);
    }
    .glass-card.soft{
      background:rgba(15,23,42,.54);
    }
    .section-badge{
      display:inline-flex;
      align-items:center;
      gap:.55rem;
      border:1px solid rgba(34,211,238,.20);
      background:rgba(34,211,238,.07);
      color:#c8fbff;
      border-radius:999px;
      padding:.45rem .85rem;
      font-size:.85rem;
      font-weight:700;
      letter-spacing:.02em;
    }
    .section-title{
      font-weight:800;
      letter-spacing:-.02em;
      line-height:1.15;
      color:#fff;
    }
    .section-lead{
      color:var(--muted);
      line-height:1.8;
      font-size:1rem;
    }
    .mini-chip{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      border:1px solid rgba(148,163,184,.16);
      background:rgba(8,18,32,.48);
      color:#dbeafe;
      border-radius:999px;
      padding:.38rem .7rem;
      font-size:.82rem;
      transition:all .22s ease;
    }
    .mini-chip:hover{
      transform:translateY(-1px);
      border-color:rgba(34,211,238,.38);
      background:rgba(34,211,238,.08);
    }
    .feature-list li{
      display:flex;
      gap:.8rem;
      color:var(--muted);
      line-height:1.75;
    }
    .feature-list li::before{
      content:"";
      width:10px;height:10px;margin-top:.56rem;border-radius:999px;
      background:linear-gradient(135deg, var(--cyan), var(--violet));
      box-shadow:0 0 18px rgba(34,211,238,.35);
      flex:none;
    }
    .metric{
      padding:1.1rem 1.1rem 1.15rem;
      border-radius:22px;
      background:linear-gradient(180deg, rgba(15,23,42,.76), rgba(8,18,32,.64));
      border:1px solid rgba(148,163,184,.16);
      box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    }
    .metric .num{
      font-size:2rem;
      line-height:1;
      font-weight:800;
      letter-spacing:-.03em;
      background:linear-gradient(135deg, #fff, #bdf8ff);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .metric .label{color:#d7e9ff;font-weight:700}
    .metric .desc{color:var(--muted-2);font-size:.92rem;line-height:1.7}
    .step{
      border-radius:24px;
      background:linear-gradient(180deg, rgba(15,23,42,.68), rgba(8,18,32,.56));
      border:1px solid rgba(148,163,184,.16);
      box-shadow:var(--shadow);
      transition:transform .24s ease, border-color .24s ease, box-shadow .24s ease;
    }
    .step:hover{
      transform:translateY(-3px);
      border-color:rgba(34,211,238,.38);
      box-shadow:0 24px 48px rgba(2,8,23,.44);
    }
    .step-no{
      width:52px;height:52px;border-radius:18px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(34,211,238,.16), rgba(124,58,237,.18));
      border:1px solid rgba(34,211,238,.22);
      color:#dffcff;
      font-weight:800;
      flex:none;
    }
    .bar{
      height:10px;
      border-radius:999px;
      background:rgba(148,163,184,.12);
      overflow:hidden;
    }
    .bar > span{
      display:block;height:100%;
      border-radius:inherit;
      background:linear-gradient(90deg, rgba(34,211,238,.95), rgba(124,58,237,.95));
      box-shadow:0 0 16px rgba(34,211,238,.28);
    }
    .compare-panel{
      position:relative;
      overflow:hidden;
      border-radius:30px;
      border:1px solid rgba(148,163,184,.16);
      background:linear-gradient(180deg, rgba(15,23,42,.64), rgba(8,18,32,.58));
      box-shadow:var(--shadow);
    }
    .compare-panel::before{
      content:"";
      position:absolute;
      inset:-1px;
      background:radial-gradient(circle at top right, rgba(34,211,238,.10), transparent 38%),
                 radial-gradient(circle at bottom left, rgba(124,58,237,.12), transparent 32%);
      pointer-events:none;
    }
    .compare-side{
      position:relative;
      border-radius:24px;
      border:1px solid rgba(148,163,184,.14);
      background:rgba(8,18,32,.50);
      padding:1.2rem;
      min-height:100%;
    }
    .compare-side.good{
      background:linear-gradient(180deg, rgba(8,18,32,.54), rgba(8,18,32,.82));
      border-color:rgba(34,211,238,.22);
      box-shadow:inset 0 0 0 1px rgba(34,211,238,.06);
    }
    .compare-side.bad{
      opacity:.96;
      background:linear-gradient(180deg, rgba(15,23,42,.56), rgba(15,23,42,.34));
    }
    .faq-item{
      border-radius:22px;
      border:1px solid rgba(148,163,184,.16);
      background:linear-gradient(180deg, rgba(15,23,42,.64), rgba(8,18,32,.54));
      overflow:hidden;
      transition:border-color .22s ease, transform .22s ease;
    }
    .faq-item[open]{
      border-color:rgba(34,211,238,.32);
      transform:translateY(-2px);
    }
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:1.05rem 1.15rem;
      font-weight:700;
      color:#f8fcff;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary .mark{
      flex:none;
      width:28px;height:28px;border-radius:999px;
      display:grid;place-items:center;
      background:rgba(34,211,238,.08);
      color:#c8fbff;
      border:1px solid rgba(34,211,238,.18);
      transition:transform .2s ease;
    }
    .faq-item[open] summary .mark{transform:rotate(45deg)}
    .faq-content{
      padding:0 1.15rem 1.1rem;
      color:var(--muted);
      line-height:1.8;
    }
    .footer{
      position:relative;
      background:linear-gradient(180deg, rgba(4,10,18,.55), rgba(3,8,16,.92));
      border-top:1px solid rgba(148,163,184,.14);
      overflow:hidden;
    }
    .footer::before{
      content:"";
      position:absolute;
      inset:0;
      background:radial-gradient(circle at 18% 0%, rgba(34,211,238,.08), transparent 26%),
                 radial-gradient(circle at 82% 20%, rgba(124,58,237,.08), transparent 28%);
      pointer-events:none;
    }
    .footer-title{
      color:#fff;
      font-weight:800;
      margin-bottom:1rem;
      letter-spacing:.01em;
    }
    .footer a{
      color:#c9d8ea;
      transition:color .22s ease, opacity .22s ease;
    }
    .footer a:hover{color:#fff}
    .footer-divider{
      border-top:1px solid rgba(148,163,184,.14);
    }
    .mobile-only{display:none}
    .mobile-panel{
      background:rgba(8,18,32,.96);
      border-top:1px solid rgba(148,163,184,.12);
    }
    .hero-glow{
      position:absolute;
      inset:auto;
      width:320px;height:320px;border-radius:50%;
      filter:blur(56px);
      background:rgba(34,211,238,.10);
      right:-90px;top:-110px;
      pointer-events:none;
    }
    .hero-glow-2{
      position:absolute;
      inset:auto;
      width:260px;height:260px;border-radius:50%;
      filter:blur(56px);
      background:rgba(124,58,237,.12);
      left:-100px;bottom:-90px;
      pointer-events:none;
    }
    @media (max-width: 1024px){
      .desktop-nav,.desktop-cta{display:none}
      .mobile-only{display:block}
    }
    @media (max-width: 767px){
      .site-container{width:min(calc(100% - 24px), var(--container))}
      .topbar .hide-sm{display:none}
      .section-title{line-height:1.18}
      .btn{width:100%}
      .btn-inline{width:auto}
      .metric .num{font-size:1.65rem}
    }

/* roulang page: category1 */
:root{
      --bg-0:#06111f;
      --bg-1:#081827;
      --bg-2:#0b1020;
      --panel:rgba(15,23,42,.72);
      --panel-soft:rgba(15,23,42,.56);
      --line:rgba(148,163,184,.16);
      --line-strong:rgba(34,211,238,.42);
      --text:#f8fafc;
      --muted:#94a3b8;
      --muted-2:#a7b3c7;
      --cyan:#22d3ee;
      --cyan-2:#18c7d8;
      --purple:#8b5cf6;
      --pink:#e879f9;
      --green:#34d399;
      --shadow:0 30px 80px rgba(2,6,23,.55);
      --radius-xl:28px;
      --radius-lg:22px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
      background:
        radial-gradient(circle at 20% 12%, rgba(34,211,238,.16), transparent 24%),
        radial-gradient(circle at 82% 18%, rgba(139,92,246,.16), transparent 24%),
        radial-gradient(circle at 70% 78%, rgba(232,121,249,.10), transparent 26%),
        linear-gradient(180deg, #06111f 0%, #071522 38%, #081827 100%);
      overflow-x:hidden;
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(148,163,184,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,.06) 1px, transparent 1px);
      background-size:88px 88px;
      mask-image: radial-gradient(circle at center, black 30%, rgba(0,0,0,.6) 68%, transparent 100%);
      opacity:.24;
      z-index:0;
    }
    body::after{
      content:"";
      position:fixed;
      inset:-10%;
      pointer-events:none;
      background:
        radial-gradient(circle at 50% 0%, rgba(34,211,238,.10), transparent 38%),
        radial-gradient(circle at 8% 40%, rgba(124,58,237,.10), transparent 34%),
        radial-gradient(circle at 92% 58%, rgba(232,121,249,.08), transparent 30%);
      filter: blur(20px);
      opacity:.9;
      z-index:0;
    }
    ::selection{background:rgba(34,211,238,.24);color:#fff}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    :focus-visible{outline:none;box-shadow:0 0 0 4px rgba(34,211,238,.18)}
    .site-container{
      width:min(100%, 80rem);
      margin:0 auto;
      padding-left:1rem;
      padding-right:1rem;
      position:relative;
      z-index:1;
    }
    @media (min-width:640px){
      .site-container{padding-left:1.5rem;padding-right:1.5rem}
    }
    @media (min-width:1024px){
      .site-container{padding-left:2rem;padding-right:2rem}
    }

    .topbar{
      position:relative;
      z-index:50;
      background:rgba(3,10,20,.76);
      border-bottom:1px solid rgba(148,163,184,.12);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
    }
    .topbar-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:30px;
      padding:0 .8rem;
      border-radius:999px;
      border:1px solid rgba(148,163,184,.18);
      color:rgba(248,250,252,.86);
      background:rgba(15,23,42,.34);
      transition:all .22s ease;
      white-space:nowrap;
    }
    .topbar-link:hover{
      color:#fff;
      border-color:rgba(34,211,238,.46);
      box-shadow:0 0 0 4px rgba(34,211,238,.08);
      transform:translateY(-1px);
    }

    .main-header{
      position:sticky;
      top:0;
      z-index:40;
      background:rgba(8,18,32,.70);
      border-bottom:1px solid rgba(148,163,184,.12);
      backdrop-filter:blur(22px);
      -webkit-backdrop-filter:blur(22px);
    }
    .brand-mark{
      width:44px;
      height:44px;
      border-radius:16px;
      display:inline-block;
      position:relative;
      overflow:hidden;
      background:
        radial-gradient(circle at 28% 30%, rgba(255,255,255,.95) 0 9%, transparent 10%),
        radial-gradient(circle at 72% 30%, rgba(255,255,255,.95) 0 9%, transparent 10%),
        radial-gradient(circle at 28% 72%, rgba(255,255,255,.95) 0 9%, transparent 10%),
        radial-gradient(circle at 72% 72%, rgba(255,255,255,.95) 0 9%, transparent 10%),
        linear-gradient(135deg, rgba(34,211,238,.92), rgba(124,58,237,.92) 58%, rgba(232,121,249,.85));
      box-shadow:0 18px 40px rgba(34,211,238,.22), inset 0 1px 0 rgba(255,255,255,.2);
    }
    .brand-mark::after{
      content:"";
      position:absolute;
      inset:10px;
      border-radius:12px;
      border:1px solid rgba(255,255,255,.18);
      background:linear-gradient(135deg, rgba(255,255,255,.08), transparent 60%);
      mix-blend-mode:screen;
    }
    .nav-link{
      position:relative;
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      color:rgba(226,232,240,.82);
      transition:all .22s ease;
      padding:.2rem 0;
      font-weight:600;
      letter-spacing:.01em;
    }
    .nav-link::after{
      content:"";
      position:absolute;
      left:0;
      bottom:-8px;
      width:0;
      height:2px;
      border-radius:999px;
      background:linear-gradient(90deg, var(--cyan), var(--purple));
      box-shadow:0 0 18px rgba(34,211,238,.38);
      transition:width .22s ease;
    }
    .nav-link:hover,
    .nav-link.active{
      color:#fff;
    }
    .nav-link:hover::after,
    .nav-link.active::after{
      width:100%;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      min-height:44px;
      padding:.85rem 1.15rem;
      border-radius:999px;
      border:1px solid transparent;
      transition:all .24s ease;
      font-weight:600;
      letter-spacing:.01em;
      white-space:nowrap;
      user-select:none;
    }
    .btn:hover{
      transform:translateY(-1px);
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg, rgba(34,211,238,1), rgba(124,58,237,1));
      box-shadow:0 18px 36px rgba(34,211,238,.18), 0 0 0 1px rgba(255,255,255,.06) inset;
    }
    .btn-primary:hover{
      box-shadow:0 22px 44px rgba(34,211,238,.24), 0 0 0 1px rgba(255,255,255,.08) inset;
      filter:brightness(1.04);
    }
    .btn-secondary{
      color:#e2e8f0;
      border-color:rgba(148,163,184,.20);
      background:rgba(15,23,42,.48);
      backdrop-filter:blur(14px);
    }
    .btn-secondary:hover{
      border-color:rgba(34,211,238,.42);
      color:#fff;
      background:rgba(15,23,42,.62);
      box-shadow:0 16px 34px rgba(2,6,23,.24);
    }
    .mobile-only{display:grid}
    .desktop-nav,.desktop-cta{display:none}
    @media (min-width:768px){
      .desktop-nav,.desktop-cta{display:flex}
      .mobile-only{display:none}
    }
    .hamburger{
      width:46px;
      height:46px;
      border-radius:16px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(15,23,42,.46);
      color:#fff;
      transition:all .22s ease;
    }
    .hamburger:hover{
      border-color:rgba(34,211,238,.42);
      background:rgba(15,23,42,.68);
    }
    .mobile-panel{
      display:none;
      border-top:1px solid rgba(148,163,184,.10);
      background:rgba(6,17,31,.88);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
    }
    .mobile-panel.is-open{display:block}
    .mobile-panel .nav-link{
      padding:.8rem 0;
      justify-content:flex-start;
      border-bottom:1px solid rgba(148,163,184,.10);
    }
    .mobile-panel .nav-link::after{bottom:10px}
    .glass-card{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-xl);
      border:1px solid rgba(148,163,184,.14);
      background:rgba(15,23,42,.60);
      box-shadow:var(--shadow);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
    }
    .glass-card:hover{
      transform:translateY(-4px);
      border-color:rgba(34,211,238,.34);
      box-shadow:0 24px 56px rgba(2,6,23,.48), 0 0 0 1px rgba(34,211,238,.10) inset;
    }
    .glass-card::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(135deg, rgba(255,255,255,.08), transparent 32%, transparent 70%, rgba(34,211,238,.06));
      pointer-events:none;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.45rem .85rem;
      border-radius:999px;
      border:1px solid rgba(34,211,238,.18);
      background:rgba(34,211,238,.08);
      color:#bff7ff;
      font-size:.85rem;
      font-weight:600;
      letter-spacing:.02em;
    }
    .section-title{
      font-size:clamp(1.9rem, 3vw, 3rem);
      line-height:1.18;
      font-weight:800;
      letter-spacing:-.03em;
    }
    .section-lead{
      color:var(--muted);
      line-height:1.8;
      font-size:1rem;
    }
    .hero-title{
      font-size:clamp(2.2rem, 4.8vw, 4.4rem);
      line-height:1.08;
      font-weight:900;
      letter-spacing:-.04em;
    }
    .hero-title .accent{
      background:linear-gradient(90deg, #ffffff 0%, #8be7ff 42%, #b39cff 78%, #ffffff 100%);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      border-radius:32px;
      border:1px solid rgba(148,163,184,.14);
      background:
        radial-gradient(circle at 20% 15%, rgba(34,211,238,.16), transparent 18%),
        radial-gradient(circle at 86% 20%, rgba(124,58,237,.16), transparent 20%),
        rgba(9,18,33,.72);
      box-shadow:0 28px 72px rgba(2,6,23,.56);
      backdrop-filter:blur(20px);
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:-2px;
      background:
        linear-gradient(120deg, rgba(34,211,238,.12), transparent 30%, transparent 65%, rgba(232,121,249,.10));
      pointer-events:none;
    }
    .metric{
      border-radius:22px;
      border:1px solid rgba(148,163,184,.12);
      background:rgba(15,23,42,.56);
      padding:1rem;
    }
    .metric .num{
      font-size:1.7rem;
      line-height:1;
      font-weight:800;
      letter-spacing:-.03em;
      background:linear-gradient(90deg, #fff, #a6f7ff);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.42rem .72rem;
      border-radius:999px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(15,23,42,.42);
      color:#d9e5f5;
      font-size:.88rem;
      transition:all .2s ease;
    }
    .chip:hover{
      transform:translateY(-1px);
      border-color:rgba(34,211,238,.40);
      color:#fff;
      background:rgba(34,211,238,.08);
    }
    .eyebrow{
      font-size:.82rem;
      letter-spacing:.14em;
      text-transform:uppercase;
      color:rgba(191,247,255,.78);
    }
    .story-strip{
      border-left:1px solid rgba(148,163,184,.16);
      padding-left:1rem;
    }
    .qa-card{
      border-radius:24px;
      border:1px solid rgba(148,163,184,.14);
      background:rgba(15,23,42,.56);
      overflow:hidden;
      box-shadow:0 18px 46px rgba(2,6,23,.34);
    }
    .qa-card summary{
      list-style:none;
      cursor:pointer;
      padding:1.1rem 1.2rem;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      color:#f8fafc;
      font-weight:700;
    }
    .qa-card summary::-webkit-details-marker{display:none}
    .qa-card[open] summary{
      border-bottom:1px solid rgba(148,163,184,.10);
      background:rgba(15,23,42,.64);
    }
    .qa-card .answer{
      padding:1rem 1.2rem 1.15rem;
      color:var(--muted);
      line-height:1.8;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.34rem .68rem;
      border-radius:999px;
      border:1px solid rgba(148,163,184,.16);
      background:rgba(15,23,42,.52);
      color:#dce8f7;
      font-size:.84rem;
    }
    .index-card{
      border-radius:24px;
      border:1px solid rgba(148,163,184,.14);
      background:rgba(15,23,42,.58);
      padding:1.2rem;
      box-shadow:0 18px 42px rgba(2,6,23,.30);
      transition:all .22s ease;
    }
    .index-card:hover{
      transform:translateY(-3px);
      border-color:rgba(34,211,238,.36);
      background:rgba(15,23,42,.72);
    }
    .index-card .tag{
      display:inline-flex;
      align-items:center;
      padding:.3rem .55rem;
      border-radius:999px;
      border:1px solid rgba(34,211,238,.18);
      color:#bff7ff;
      background:rgba(34,211,238,.08);
      font-size:.78rem;
      margin-bottom:.8rem;
    }
    .footer-title{
      font-size:.95rem;
      font-weight:800;
      color:#fff;
      margin-bottom:1rem;
      letter-spacing:.02em;
    }
    footer{
      position:relative;
      z-index:1;
      background:linear-gradient(180deg, rgba(7,15,28,.18), rgba(2,6,23,.90));
      border-top:1px solid rgba(148,163,184,.12);
    }
    footer a{
      color:#cbd5e1;
      transition:color .2s ease, transform .2s ease;
    }
    footer a:hover{
      color:#fff;
      transform:translateX(2px);
    }
    .footer-divider{
      border-top:1px solid rgba(148,163,184,.10);
    }
    .form-field{
      width:100%;
      border-radius:18px;
      border:1px solid rgba(148,163,184,.18);
      background:rgba(15,23,42,.58);
      color:#fff;
      padding:.95rem 1rem;
      outline:none;
      transition:all .22s ease;
    }
    .form-field::placeholder{color:rgba(148,163,184,.68)}
    .form-field:focus{
      border-color:rgba(34,211,238,.44);
      box-shadow:0 0 0 4px rgba(34,211,238,.12);
      background:rgba(15,23,42,.74);
    }
    textarea.form-field{min-height:140px;resize:vertical}
    .dot-line{
      height:1px;
      background:linear-gradient(90deg, transparent, rgba(34,211,238,.40), rgba(124,58,237,.35), transparent);
    }
    .accent-border{
      position:relative;
    }
    .accent-border::before{
      content:"";
      position:absolute;
      left:0;
      top:0;
      bottom:0;
      width:3px;
      border-radius:999px;
      background:linear-gradient(180deg, rgba(34,211,238,1), rgba(124,58,237,1));
      box-shadow:0 0 16px rgba(34,211,238,.28);
    }
    .soft-grid{
      background-image:
        linear-gradient(rgba(148,163,184,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,.08) 1px, transparent 1px);
      background-size:34px 34px;
    }
    .glow-orb{
      position:absolute;
      border-radius:999px;
      filter:blur(8px);
      opacity:.45;
      pointer-events:none;
    }
    @media (max-width:767px){
      .hide-sm{display:none !important}
      .hero-title{font-size:clamp(2rem, 8vw, 3.1rem)}
    }