:root{
      --bg:#f5f7fb;
      --bg-2:#eef3ff;
      --panel:#ffffff;
      --panel-2:#f8fbff;
      --line:#dbe3f1;
      --text:#102033;
      --muted:#516177;
      --brand:#4d63ff;
      --brand-2:#12c2e9;
      --accent:#ff4fd8;
      --gold:#ffbe55;
      --shadow:0 18px 50px rgba(20,40,90,.10);
      --shadow-soft:0 12px 28px rgba(20,40,90,.08);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      background:
        radial-gradient(circle at 12% 10%, rgba(77,99,255,.12), transparent 25%),
        radial-gradient(circle at 88% 18%, rgba(18,194,233,.10), transparent 22%),
        linear-gradient(180deg, #f7f9ff 0%, #f3f6fb 45%, #f7f9fc 100%);
      color:var(--text);
      line-height:1.6;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .site-shell{position:relative}
    .container{
      width:min(var(--container), calc(100% - 32px));
      margin:0 auto;
    }
    .topbar,.hero,.section,.footer{
      position:relative;
    }
    .topbar{
      backdrop-filter:blur(14px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(219,227,241,.8);
      position:sticky;
      top:0;
      z-index:80;
    }
    .nav{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:14px 0;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width:0;
    }
    .brand-mark{
      width:44px;height:44px;border-radius:14px;
      background:linear-gradient(135deg,var(--brand),var(--accent));
      box-shadow:0 14px 28px rgba(77,99,255,.25);
      display:grid;place-items:center;
      color:#fff;
      font-weight:800;
      letter-spacing:.06em;
      flex:0 0 auto;
    }
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.03rem;line-height:1.15}
    .brand-text span{display:block;font-size:.82rem;color:var(--muted)}
    .menu-toggle{
      display:none;
      border:1px solid var(--line);
      background:#fff;
      color:var(--text);
      padding:10px 12px;
      border-radius:14px;
    }
    .nav-links{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      justify-content:flex-end;
      gap:10px 14px;
    }
    .nav-links a{
      color:var(--text);
      font-size:.95rem;
      padding:8px 10px;
      border-radius:999px;
      transition:.22s ease;
    }
    .nav-links a:hover{background:rgba(77,99,255,.08);color:var(--brand)}
    .nav-cta{
      display:flex;
      gap:10px;
      align-items:center;
      flex:0 0 auto;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      border:none;
      border-radius:999px;
      padding:12px 18px;
      font-weight:700;
      cursor:pointer;
      transition:.25s ease;
      box-shadow:none;
      white-space:nowrap;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 14px 30px rgba(77,99,255,.22);
    }
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(77,99,255,.28)}
    .btn-ghost{
      color:var(--text);
      background:#fff;
      border:1px solid var(--line);
    }
    .btn-ghost:hover{border-color:rgba(77,99,255,.35);transform:translateY(-2px)}
    .hero{
      padding:42px 0 22px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.15fr .85fr;
      gap:24px;
      align-items:stretch;
    }
    .hero-card,.panel{
      background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(248,251,255,.96));
      border:1px solid rgba(219,227,241,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
    }
    .hero-card{
      padding:28px;
      overflow:hidden;
      isolation:isolate;
    }
    .hero-card::before,.hero-card::after{
      content:"";
      position:absolute;
      border-radius:999px;
      filter:blur(2px);
      pointer-events:none;
      z-index:-1;
    }
    .hero-card::before{
      width:220px;height:220px;
      right:-70px;top:-70px;
      background:radial-gradient(circle, rgba(255,79,216,.20), transparent 64%);
    }
    .hero-card::after{
      width:260px;height:260px;
      left:-90px;bottom:-120px;
      background:radial-gradient(circle, rgba(18,194,233,.18), transparent 62%);
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(77,99,255,.08);
      color:var(--brand);
      font-weight:700;
      font-size:.92rem;
      margin-bottom:16px;
    }
    h1{
      margin:0 0 14px;
      font-size:clamp(2rem,4vw,3.6rem);
      line-height:1.08;
      letter-spacing:-.03em;
    }
    .hero p{
      margin:0;
      color:var(--muted);
      font-size:1.02rem;
      max-width:62ch;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin:24px 0 20px;
    }
    .hero-points{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
      margin-top:18px;
    }
    .point{
      background:rgba(255,255,255,.86);
      border:1px solid var(--line);
      border-radius:18px;
      padding:14px;
    }
    .point strong{display:block;font-size:1.12rem}
    .point span{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}
    .hero-aside{
      display:grid;
      gap:16px;
    }
    .panel{
      padding:20px;
    }
    .mini-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
    }
    .mini{
      background:linear-gradient(135deg, rgba(77,99,255,.07), rgba(18,194,233,.07));
      border:1px solid rgba(77,99,255,.14);
      border-radius:18px;
      padding:16px;
    }
    .mini strong{display:block;font-size:1.14rem}
    .mini span{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}
    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .tag{
      padding:9px 12px;
      border-radius:999px;
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      font-size:.92rem;
    }
    .section{
      padding:24px 0;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:16px;
      margin-bottom:16px;
    }
    .section-head h2{
      margin:0;
      font-size:clamp(1.4rem,2.8vw,2.2rem);
      line-height:1.15;
    }
    .section-head p{
      margin:0;
      color:var(--muted);
      max-width:68ch;
    }
    .grid-4{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
    }
    .card{
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:22px;
      padding:18px;
      box-shadow:var(--shadow-soft);
      transition:.25s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(20,40,90,.12)}
    .metric{
      font-size:1.8rem;
      font-weight:800;
      color:var(--brand);
      letter-spacing:-.03em;
    }
    .card h3,.card h4{margin:10px 0 8px}
    .card p{margin:0;color:var(--muted)}
    .split{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:16px;
      align-items:start;
    }
    .list{
      display:grid;
      gap:10px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      color:var(--text);
      padding:10px 12px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
    }
    .dot{
      width:10px;height:10px;border-radius:50%;
      background:linear-gradient(135deg,var(--brand),var(--accent));
      margin-top:7px;flex:0 0 auto;
    }
    .feature-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:16px;
    }
    .feature{
      min-height:100%;
    }
    .feature .icon{
      width:44px;height:44px;border-radius:14px;
      background:linear-gradient(135deg, rgba(77,99,255,.14), rgba(255,79,216,.14));
      display:grid;place-items:center;
      color:var(--brand);
      font-weight:800;
    }
    .steps{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
      counter-reset:step;
    }
    .step{
      position:relative;
    }
    .step::before{
      counter-increment:step;
      content:"0" counter(step);
      display:inline-flex;
      width:46px;height:46px;
      align-items:center;justify-content:center;
      border-radius:14px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff;font-weight:800;
      margin-bottom:14px;
    }
    .table-wrap{
      overflow-x:auto;
      border-radius:22px;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:var(--shadow-soft);
    }
    table{
      width:100%;
      border-collapse:collapse;
      min-width:760px;
      background:#fff;
    }
    th,td{
      padding:16px 14px;
      text-align:left;
      border-bottom:1px solid #edf2fa;
      vertical-align:top;
    }
    th{
      background:#f7faff;
      color:var(--text);
      font-size:.96rem;
    }
    td{color:var(--muted)}
    .highlight{
      color:var(--brand);
      font-weight:700;
    }
    .rating{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:16px;
    }
    .stars{
      color:#ffb400;
      font-size:1.2rem;
      letter-spacing:.08em;
    }
    .quote-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:16px;
    }
    .quote{
      position:relative;
      padding-top:22px;
    }
    .quote::before{
      content:"“";
      position:absolute;
      top:-2px;left:16px;
      font-size:3rem;
      color:rgba(77,99,255,.24);
      line-height:1;
    }
    .quote small{display:block;color:var(--muted);margin-top:10px}
    .faq{
      display:grid;
      gap:12px;
    }
    details{
      background:#fff;
      border:1px solid var(--line);
      border-radius:18px;
      box-shadow:var(--shadow-soft);
      overflow:hidden;
    }
    summary{
      cursor:pointer;
      list-style:none;
      padding:16px 18px;
      font-weight:700;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
    }
    summary::-webkit-details-marker{display:none}
    summary::after{
      content:"+";
      color:var(--brand);
      font-size:1.3rem;
      line-height:1;
    }
    details[open] summary::after{content:"–"}
    details p{padding:0 18px 18px;margin:0;color:var(--muted)}
    .article-list{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:16px;
    }
    .article{
      display:flex;
      gap:14px;
      align-items:flex-start;
    }
    .article .thumb{
      width:90px;
      height:64px;
      border-radius:14px;
      background:linear-gradient(135deg, rgba(77,99,255,.12), rgba(18,194,233,.12));
      border:1px solid rgba(77,99,255,.12);
      flex:0 0 auto;
    }
    .article h4{margin:0 0 6px}
    .article p{margin:0;color:var(--muted);font-size:.94rem}
    .form-grid{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:16px;
      align-items:start;
    }
    form{
      display:grid;
      gap:12px;
    }
    .field{
      display:grid;
      gap:8px;
    }
    .field label{font-weight:700}
    .field input,.field select,.field textarea{
      width:100%;
      border:1px solid var(--line);
      background:#fff;
      color:var(--text);
      border-radius:14px;
      padding:13px 14px;
      font:inherit;
      outline:none;
      transition:.2s ease;
    }
    .field input:focus,.field select:focus,.field textarea:focus{
      border-color:rgba(77,99,255,.6);
      box-shadow:0 0 0 4px rgba(77,99,255,.10);
    }
    textarea{min-height:132px;resize:vertical}
    .footer{
      padding:18px 0 28px;
    }
    .footer-inner{
      background:#0f1e35;
      color:#eaf0ff;
      border-radius:28px 28px 18px 18px;
      padding:26px;
      box-shadow:0 18px 46px rgba(8,16,32,.16);
    }
    .footer-inner a{color:#cfe0ff}
    .footer-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr .9fr;
      gap:18px;
    }
    .footer h3,.footer h4{margin:0 0 12px}
    .footer p,.footer li{color:#c8d4ea}
    .footer ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
    .footer-note{
      margin-top:18px;
      padding-top:14px;
      border-top:1px solid rgba(255,255,255,.12);
      display:flex;
      justify-content:space-between;
      gap:14px;
      flex-wrap:wrap;
      color:#b6c6e5;
      font-size:.92rem;
    }
    .floating{
      position:fixed;
      right:18px;
      bottom:18px;
      z-index:90;
      display:grid;
      gap:10px;
    }
    .float-btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:52px;height:52px;
      border-radius:50%;
      background:linear-gradient(135deg,var(--brand),var(--accent));
      color:#fff;
      box-shadow:0 16px 30px rgba(77,99,255,.28);
      border:none;
    }
    .float-card{
      width:min(320px, calc(100vw - 36px));
      background:#fff;
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:var(--shadow);
      padding:14px;
      display:none;
    }
    .float-card.open{display:block}
    .float-card .qr{
      width:100%;
      border-radius:16px;
      border:1px solid var(--line);
      margin:8px 0 10px;
    }
    .mobile-only{display:none}
    .scroll-top{
      position:fixed;
      left:18px;
      bottom:18px;
      z-index:90;
      border:none;
      width:52px;height:52px;
      border-radius:50%;
      background:#fff;
      color:var(--brand);
      box-shadow:var(--shadow);
      border:1px solid var(--line);
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.split,.rating,.form-grid,.footer-grid,.grid-4,.feature-grid,.steps,.quote-grid,.article-list{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;
        width:100%;
        padding:10px 0 0;
      }
      .nav{flex-wrap:wrap}
      .nav-cta{margin-left:auto}
    }
    @media (max-width: 720px){
      .hero-grid,.split,.rating,.form-grid,.footer-grid,.grid-4,.feature-grid,.steps,.quote-grid,.article-list{grid-template-columns:1fr}
      .hero-card,.panel{padding:20px;border-radius:22px}
      .hero{padding-top:22px}
      .section{padding:18px 0}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav-cta .btn-ghost{display:none}
      .mobile-only{display:inline-flex}
      .footer-inner{padding:20px}
    }