:root{
      --bg:#f5f9ff;
      --panel:#ffffff;
      --panel-2:#f8fbff;
      --text:#1d2b36;
      --muted:#5e7486;
      --line:#dfe9f3;
      --brand:#1b7cff;
      --brand-2:#17c6a5;
      --accent:#ffb84d;
      --shadow:0 18px 48px rgba(18, 61, 101, .10);
      --radius:20px;
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(27,124,255,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(23,198,165,.10), transparent 26%),
        linear-gradient(180deg, #f8fcff 0%, #f4f9ff 46%, #f7fbff 100%);
    }
    a{color:var(--brand);text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--max);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(245,249,255,.84);
      border-bottom:1px solid rgba(223,233,243,.8);
    }
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 18px rgba(27,124,255,.12)}
    .brand h2{margin:0;font-size:16px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{color:var(--text);font-size:14px;padding:8px 10px;border-radius:10px}
    .nav-links a:hover,.nav-links a.active{background:rgba(27,124,255,.10);color:var(--brand)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:14px;padding:12px 18px;font-weight:700;cursor:pointer;
      transition:.25s ease;box-shadow:none
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#2a9dff);color:#fff;box-shadow:0 14px 30px rgba(27,124,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(27,124,255,.28)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .hero{padding:30px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.panel,.faq-item,.review,.article,.compare,.form-card,.benefit,.step,.metric,.price,.network,.timeline li{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(223,233,243,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:999px;background:linear-gradient(135deg, rgba(27,124,255,.16), rgba(23,198,165,.10));filter:blur(4px)
    }
    .hero-main::before{width:220px;height:220px;right:-80px;top:-60px}
    .hero-main::after{width:160px;height:160px;left:-50px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(27,124,255,.10);color:var(--brand);font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .mini-stat{padding:14px 14px 12px;border-radius:16px;background:linear-gradient(180deg,#f9fcff,#eef6ff);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:18px;margin-bottom:4px}
    .mini-stat span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;display:grid;gap:14px;align-content:start}
    .side-kicker{margin:0;color:var(--muted);font-size:13px}
    .side-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .side-list li{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:14px;background:#f8fbff;border:1px solid #e7eef7}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));margin-top:5px;flex:0 0 auto}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:64ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .metric,.benefit,.step,.price,.network{padding:20px}
    .metric strong{display:block;font-size:30px}
    .metric span,.benefit p,.step p,.review p,.article p,.network p{color:var(--muted);line-height:1.7}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#294154;font-size:13px}
    .panel{padding:22px}
    .service-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .card{padding:18px;transition:transform .25s ease, box-shadow .25s ease}
    .card:hover,.review:hover,.article:hover,.benefit:hover,.step:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(18,61,101,.14)}
    .card h3,.benefit h3,.step h3,.review h3,.article h3{margin:0 0 8px;font-size:18px}
    .card ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.75}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .workflow .step{position:relative}
    .workflow .step::after{content:"";position:absolute;right:-8px;top:28px;width:16px;height:2px;background:linear-gradient(90deg, var(--brand), var(--brand-2));opacity:.45}
    .workflow .step:last-child::after{display:none}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
    th{background:#f5f9ff}
    td strong{color:var(--brand)}
    .faq{display:grid;gap:12px}
    .faq-item summary{cursor:pointer;list-style:none;padding:18px 18px;font-weight:700;display:flex;justify-content:space-between;gap:12px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 18px 18px;color:var(--muted);line-height:1.8}
    .review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review .meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px;margin-top:10px}
    .stars{color:#ffb84d;font-size:14px}
    .article .meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px;margin-bottom:8px}
    .images{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .images img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .compare{padding:20px}
    .compare .rating{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:14px}
    .badge{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;background:rgba(27,124,255,.10);color:var(--brand);font-weight:700}
    .form-card form{display:grid;gap:12px}
    .field-row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;color:var(--text);
      padding:13px 14px;border-radius:14px;font:inherit;outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(27,124,255,.55);box-shadow:0 0 0 4px rgba(27,124,255,.10)}
    .footer{
      margin-top:14px;padding:24px 0 28px;border-top:1px solid rgba(223,233,243,.9);
      background:linear-gradient(180deg, rgba(245,249,255,.2), rgba(245,249,255,.92));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .8fr;gap:18px}
    .footer h3,.footer h4{margin:0 0 12px}
    .footer a{color:#194f9c}
    .footer p,.footer li{color:var(--muted);line-height:1.8}
    .footer ul{margin:0;padding:0;list-style:none}
    .copyright{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:52px;height:52px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;color:var(--text);cursor:pointer
    }
    .mobile-links{display:none}
    @media (max-width: 1080px){
      .hero-grid,.grid-3,.grid-2,.service-list,.workflow,.review-grid,.article-grid,.footer-grid,.images{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;width:100%;padding:12px 0 4px}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-wrap{flex-wrap:wrap}
      .hero-grid,.grid-3,.grid-2,.service-list,.workflow,.review-grid,.article-grid,.footer-grid,.images,.hero-points,.field-row{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .section-head{align-items:start;flex-direction:column}
      .workflow .step::after{display:none}
      table{min-width:760px}
      .mobile-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.65s ease}
    .reveal.visible{opacity:1;transform:none}