:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f0f5ff;
      --text:#132238;
      --muted:#5c6b84;
      --line:#dfe6f3;
      --brand:#2a67ff;
      --brand-2:#06c7a7;
      --warm:#ffb340;
      --shadow:0 18px 50px rgba(22,44,84,.10);
      --shadow-soft:0 10px 28px rgba(22,44,84,.08);
      --radius:22px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{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(42,103,255,.12), transparent 26%),
        radial-gradient(circle at 85% 12%, rgba(6,199,167,.12), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f6f8fc 100%);
      min-width:320px;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar, header, main, footer{position:relative; z-index:1}
    .topbar{
      border-bottom:1px solid rgba(223,230,243,.8);
      background:rgba(255,255,255,.82);
      backdrop-filter: blur(10px);
    }
    .topbar-inner, .nav-inner, .hero-grid, .split, .cards, .service-grid, .review-grid, .case-grid, .info-grid, .footer-grid, .network-grid, .compare-grid, .steps-grid, .train-grid, .price-grid, .faq-wrap, .article-grid{
      display:grid;
      gap:18px;
    }
    .topbar-inner{
      grid-template-columns:1fr auto;
      align-items:center;
      padding:10px 0;
      color:var(--muted);
      font-size:14px;
    }
    .chip-row{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.8)}
    header{
      padding:14px 0 0;
    }
    .nav{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(223,230,243,.9);
      border-radius:24px;
      box-shadow:var(--shadow-soft);
    }
    .nav-inner{
      grid-template-columns:auto 1fr auto;
      align-items:center;
      padding:14px 16px;
      gap:16px;
    }
    .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;border:1px solid var(--line);padding:5px}
    .brand strong{font-size:18px;display:block}
    .brand span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .menu-toggle{
      display:none;
      border:1px solid var(--line);
      background:#fff;
      color:var(--text);
      border-radius:12px;
      padding:10px 12px;
      font-size:14px;
    }
    nav ul{
      list-style:none;
      display:flex;
      flex-wrap:wrap;
      gap:6px;
      margin:0;
      padding:0;
      justify-content:center;
    }
    nav a{
      display:inline-flex;
      align-items:center;
      padding:10px 12px;
      border-radius:12px;
      color:#20314f;
      font-size:14px;
      transition:.22s ease;
    }
    nav a:hover, nav a:focus{background:var(--panel-2); color:var(--brand); transform:translateY(-1px)}
    .home-link{
      display:inline-flex; align-items:center; justify-content:center;
      border-radius:14px;
      background:linear-gradient(135deg,var(--brand),#6b8dff);
      color:#fff; padding:11px 16px; box-shadow:0 14px 26px rgba(42,103,255,.24);
      font-weight:700;
    }
    .hero{
      padding:26px 0 10px;
    }
    .hero-grid{
      grid-template-columns:1.18fr .82fr;
      align-items:stretch;
    }
    .hero-card{
      background:linear-gradient(145deg, rgba(16,34,61,.96), rgba(24,64,138,.92));
      color:#fff;
      border-radius:32px;
      padding:34px;
      box-shadow:0 26px 70px rgba(20,43,86,.22);
      overflow:hidden;
      position:relative;
      min-height: 100%;
    }
    .hero-card::before,.hero-card::after{
      content:"";
      position:absolute;
      border-radius:50%;
      background:rgba(255,255,255,.08);
      filter:blur(3px);
    }
    .hero-card::before{width:240px;height:240px;right:-70px;top:-70px}
    .hero-card::after{width:160px;height:160px;right:90px;bottom:-50px}
    .hero-kicker{display:inline-flex;gap:8px;align-items:center;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:8px 12px;font-size:13px}
    h1{margin:18px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:.02em}
    .hero p{margin:0;color:rgba(255,255,255,.86);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:0 18px;border-radius:14px;border:1px solid transparent;
      font-weight:700;transition:.22s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,#fff,#dff2ff);color:#17305e}
    .btn-outline{background:transparent;border-color:rgba(255,255,255,.24);color:#fff}
    .btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(0,0,0,.14)}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .hero-meta div{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:14px}
    .hero-meta strong{display:block;font-size:22px;margin-bottom:4px}
    .hero-meta span{color:rgba(255,255,255,.74);font-size:13px;line-height:1.5}
    .hero-side{
      display:grid;
      gap:18px;
    }
    .side-panel{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(223,230,243,.9);
      border-radius:28px;
      box-shadow:var(--shadow-soft);
      padding:22px;
    }
    .side-panel h2,.section-title h2{margin:0 0 10px;font-size:clamp(24px,3vw,34px);line-height:1.15}
    .section-title p{margin:0;color:var(--muted);line-height:1.7}
    .panel-list{display:grid;gap:12px;margin:16px 0 0;padding:0;list-style:none}
    .panel-list li{display:flex;gap:10px;align-items:flex-start;color:#20314f;line-height:1.65}
    .dot{width:10px;height:10px;border-radius:50%;margin-top:7px;background:linear-gradient(135deg,var(--brand),var(--brand-2));flex:none}
    section{padding:18px 0}
    .section-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(223,230,243,.9);
      border-radius:28px;
      padding:24px;
      box-shadow:var(--shadow-soft);
    }
    .section-title{margin-bottom:18px}
    .cards{grid-template-columns:repeat(4,1fr)}
    .mini-card,.service-card,.review-card,.case-card,.info-card,.price-card,.network-card,.step-card,.train-card,.compare-card,.faq-item,.article-card{
      background:linear-gradient(180deg,#fff, #f9fbff);
      border:1px solid var(--line);
      border-radius:22px;
      box-shadow:0 10px 24px rgba(22,44,84,.06);
      padding:20px;
      transition:.22s ease;
    }
    .mini-card:hover,.service-card:hover,.review-card:hover,.case-card:hover,.info-card:hover,.price-card:hover,.network-card:hover,.step-card:hover,.train-card:hover,.compare-card:hover,.article-card:hover{
      transform:translateY(-4px);
      box-shadow:0 16px 34px rgba(22,44,84,.12);
    }
    .mini-card strong{font-size:28px;display:block;color:#1a3d86}
    .mini-card span{display:block;margin-top:6px;color:var(--muted);line-height:1.6}
    .service-grid,.review-grid,.case-grid,.article-grid{grid-template-columns:repeat(3,1fr)}
    .service-card h3,.case-card h3,.review-card h3,.price-card h3,.train-card h3,.compare-card h3,.network-card h3,.info-card h3,.step-card h3,.article-card h3{margin:0 0 10px;font-size:18px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#eef4ff;border:1px solid #d7e4ff;color:#23406f;font-size:13px}
    .split{grid-template-columns:1fr 1fr;align-items:start}
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:16px;border-radius:18px;background:#f7faff;border:1px solid var(--line)}
    .timeline-badge{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--brand),#6b8dff);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
    .compare-grid{grid-template-columns:1.05fr .95fr}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:720px;background:#fff}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f2f7ff;color:#1c335f}
    .score-box{
      background:linear-gradient(135deg,#0f2346,#2a67ff);
      color:#fff;
      border-radius:24px;padding:22px;
      box-shadow:0 18px 44px rgba(42,103,255,.24)
    }
    .score-box strong{font-size:48px;line-height:1}
    .faq-wrap{grid-template-columns:1fr 1fr}
    details.faq-item{padding:0;overflow:hidden}
    details summary{list-style:none;cursor:pointer;padding:18px 20px;font-weight:700}
    details summary::-webkit-details-marker{display:none}
    details .faq-content{padding:0 20px 18px;color:var(--muted);line-height:1.75}
    .form-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:14px;
    }
    label{display:block;font-size:14px;color:#20314f;margin-bottom:8px;font-weight:600}
    input,select,textarea{
      width:100%;
      border:1px solid var(--line);
      background:#fff;
      border-radius:14px;
      padding:12px 14px;
      font:inherit;
      color:var(--text);
      outline:none;
      transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#8fb0ff; box-shadow:0 0 0 4px rgba(42,103,255,.10)}
    textarea{min-height:120px;resize:vertical}
    .form-full{grid-column:1/-1}
    .submit-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:12px}
    .helper{color:var(--muted);font-size:13px;line-height:1.6}
    .network-grid{grid-template-columns:repeat(4,1fr)}
    .footer{
      padding:18px 0 28px;
    }
    footer .section-card{background:linear-gradient(180deg,#eff5ff,#f8fbff)}
    .footer-grid{grid-template-columns:1.1fr .9fr}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#24416f}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:20;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;border:none;background:linear-gradient(135deg,var(--brand),#6b8dff);
      color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 16px 30px rgba(42,103,255,.28);cursor:pointer
    }
    .float-card{
      position:fixed;right:16px;bottom:80px;z-index:19;width:min(320px, calc(100vw - 32px));
      background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:16px;display:none
    }
    .float-card.show{display:block}
    .float-card img{border-radius:16px;border:1px solid var(--line)}
    .muted{color:var(--muted)}
    .article-card small,.case-card small,.review-card small,.info-card small{color:var(--muted)}
    .sticky-nav{
      position:sticky;top:10px
    }
    @media (max-width: 1024px){
      .hero-grid,.split,.compare-grid,.faq-wrap,.footer-grid,.service-grid,.review-grid,.case-grid,.article-grid,.network-grid,.cards{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 820px){
      .topbar-inner,.nav-inner{grid-template-columns:1fr}
      .menu-toggle{display:inline-flex;justify-self:start}
      nav{display:none}
      nav.open{display:block}
      nav ul{justify-content:flex-start;padding-top:10px}
      .hero-grid,.split,.compare-grid,.faq-wrap,.footer-grid,.service-grid,.review-grid,.case-grid,.article-grid,.network-grid,.cards,.form-grid{grid-template-columns:1fr}
      .hero-card{padding:24px}
      .hero-meta{grid-template-columns:1fr}
      .section-card{padding:18px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition: .6s ease}
    .reveal.visible{opacity:1;transform:none}