:root{
      --bg:#f5f8ff;
      --bg-2:#eef4ff;
      --card:#ffffff;
      --card-2:#f7fbff;
      --text:#142033;
      --muted:#5c6b83;
      --line:#d9e4f5;
      --brand:#0b5cff;
      --brand-2:#3b8bff;
      --brand-3:#7eb0ff;
      --shadow:0 18px 45px rgba(15, 61, 150, .10);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
      background:
        radial-gradient(circle at top left, rgba(11,92,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(62,140,255,.10), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f3f7ff 100%);
      color:var(--text);
      line-height:1.65;
    }
    a{color:var(--brand); text-decoration:none}
    img{display:block; max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(160%) blur(10px);
      background:rgba(248,251,255,.86);
      border-bottom:1px solid rgba(217,228,245,.9);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      padding:14px 0;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .logo-wrap{
      width:44px; height:44px; border-radius:14px; overflow:hidden;
      background:linear-gradient(135deg, rgba(11,92,255,.12), rgba(62,140,255,.08));
      border:1px solid var(--line); flex:0 0 auto;
      display:flex; align-items:center; justify-content:center;
    }
    .brand h2{margin:0; font-size:1rem; line-height:1.2}
    .brand p{margin:2px 0 0; color:var(--muted); font-size:.86rem}
    .nav-links{display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:flex-end}
    .nav-links a{
      padding:8px 11px; border-radius:999px; color:var(--text); font-size:.92rem;
      border:1px solid transparent;
    }
    .nav-links a:hover,.nav-links a:focus{background:#fff; border-color:var(--line); box-shadow:0 8px 20px rgba(15,61,150,.08)}
    .nav-toggle{display:none; border:1px solid var(--line); background:#fff; color:var(--text); border-radius:12px; padding:10px 12px}
    .hero{
      position:relative;
      padding:34px 0 22px;
    }
    .hero-grid{
      display:grid; grid-template-columns: 1.25fr .75fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.feature-card,.review-card,.article-card,.faq-item,.step-card,.value-card,.price-card,.case-card,.compare-card,.form-card,.timeline-card,.network-card{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,251,255,.98));
      border:1px solid rgba(217,228,245,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:28px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:7px 12px;
      background:rgba(11,92,255,.08); color:var(--brand); border-radius:999px; font-weight:700; font-size:.9rem;
      border:1px solid rgba(11,92,255,.12);
    }
    h1{margin:16px 0 14px; font-size:clamp(2rem, 4vw, 3.5rem); line-height:1.08; letter-spacing:-.03em}
    .lead{color:var(--muted); font-size:1.05rem; margin:0 0 22px; max-width:64ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin-bottom:20px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:14px; border:1px solid transparent; font-weight:700;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor:pointer;
    }
    .btn:hover{transform:translateY(-1px); box-shadow:0 14px 24px rgba(15,61,150,.12)}
    .btn-primary{background:linear-gradient(135deg, var(--brand), var(--brand-2)); color:#fff}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .hero-points{
      display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:12px;
    }
    .point{
      padding:14px; border-radius:16px; background:var(--card-2); border:1px solid var(--line);
    }
    .point strong{display:block; font-size:1.08rem}
    .point span{color:var(--muted); font-size:.9rem}
    .hero-side{padding:22px; display:flex; flex-direction:column; gap:14px}
    .mini-stats{display:grid; grid-template-columns:1fr 1fr; gap:12px}
    .mini-stat{padding:16px; border-radius:16px; background:linear-gradient(180deg, #f7fbff, #eef5ff); border:1px solid var(--line)}
    .mini-stat b{display:block; font-size:1.35rem; color:var(--brand)}
    .mini-stat small{color:var(--muted)}
    .side-note{padding:16px; border-radius:16px; background:#fff; border:1px dashed #c9d9f5; color:var(--muted)}
    section{padding:20px 0}
    .section-title{display:flex; flex-direction:column; gap:8px; margin-bottom:16px}
    .section-title h2{margin:0; font-size:clamp(1.45rem, 2.5vw, 2.15rem)}
    .section-title p{margin:0; color:var(--muted)}
    .grid-3{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px}
    .feature-card,.value-card,.case-card,.review-card,.article-card,.timeline-card,.network-card,.price-card,.compare-card,.form-card{padding:20px}
    .feature-card h3,.value-card h3,.case-card h3,.review-card h3,.article-card h3,.timeline-card h3,.network-card h3,.price-card h3,.compare-card h3,.form-card h3{margin:0 0 10px; font-size:1.08rem}
    .muted{color:var(--muted)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span,.chip{padding:8px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:var(--text); font-size:.92rem}
    .workflow{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:14px}
    .step-card{padding:18px}
    .step-index{width:34px; height:34px; border-radius:50%; display:grid; place-items:center; background:linear-gradient(135deg, var(--brand), var(--brand-2)); color:#fff; font-weight:800; margin-bottom:12px}
    .table-wrap{overflow-x:auto; border-radius:18px}
    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:#f3f8ff; color:var(--text)}
    .rating{
      display:grid; grid-template-columns: 1.1fr .9fr; gap:16px; align-items:stretch;
    }
    .rating-score{
      border-radius:18px; padding:20px; background:linear-gradient(135deg, rgba(11,92,255,.10), rgba(62,140,255,.06));
      border:1px solid rgba(11,92,255,.14)
    }
    .score-big{font-size:2.4rem; font-weight:900; color:var(--brand); line-height:1}
    .stars{color:#f2b01e; font-size:1.15rem; letter-spacing:.08em}
    details.faq-item{padding:0; overflow:hidden}
    details.faq-item summary{
      list-style:none; cursor:pointer; padding:18px 20px; font-weight:700; display:flex; align-items:center; justify-content:space-between; gap:12px;
    }
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item .faq-content{padding:0 20px 18px; color:var(--muted)}
    .faq-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    .reviews-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .review-meta{display:flex; justify-content:space-between; gap:10px; margin-top:14px; color:var(--muted); font-size:.92rem}
    .article-list{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px}
    .article-list ul{margin:0; padding-left:18px; color:var(--muted)}
    .article-list li{margin:8px 0}
    .form{
      display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px;
    }
    .field{display:flex; flex-direction:column; gap:8px}
    .field.full{grid-column:1 / -1}
    input,select,textarea{
      width:100%; padding:13px 14px; border-radius:14px; border:1px solid var(--line);
      background:#fff; color:var(--text); font:inherit; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(11,92,255,.55); box-shadow:0 0 0 4px rgba(11,92,255,.08)}
    .footer{
      margin-top:18px; padding:24px 0 28px; background:#0c1d3a; color:#dce8ff;
    }
    .footer a{color:#8fc0ff}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px}
    .footer-card{padding:0}
    .footer h3{margin:0 0 12px; color:#fff}
    .footer p,.footer li{color:#dce8ff}
    .footer ul{margin:0; padding-left:18px}
    .copyright{margin-top:18px; padding-top:16px; border-top:1px solid rgba(255,255,255,.12); color:#c4d7ff; font-size:.92rem}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:flex; flex-direction:column; gap:10px;
    }
    .float-btn{
      width:48px; height:48px; border-radius:16px; display:grid; place-items:center;
      background:linear-gradient(135deg, var(--brand), var(--brand-2)); color:#fff; box-shadow:0 14px 28px rgba(11,92,255,.28);
      border:none; cursor:pointer;
    }
    .kefu-box{
      position:fixed; left:16px; bottom:16px; z-index:60; width:220px;
      background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow); overflow:hidden;
    }
    .kefu-box .head{padding:12px 14px; background:linear-gradient(135deg, rgba(11,92,255,.08), rgba(62,140,255,.04)); font-weight:700}
    .kefu-box .body{padding:14px}
    .kefu-box .body img{width:100%; border-radius:14px; background:#f5f8ff; border:1px solid var(--line)}
    .kefu-box .body .small{margin-top:10px; color:var(--muted); font-size:.92rem}
    .topbar-note{display:none}
    .fade-in{opacity:0; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease}
    .fade-in.in-view{opacity:1; transform:none}
    .anchor-spacer{scroll-margin-top:86px}
    .section-card{padding:20px}
    .top-links-mobile{display:none}
    @media (max-width: 1024px){
      .hero-grid,.rating,.footer-grid,.grid-3,.reviews-grid,.article-list,.grid-2,.faq-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:repeat(2,minmax(0,1fr))}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .nav-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex; position:absolute; left:16px; right:16px; top:68px;
        padding:14px; background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow);
      }
      .nav.open{position:relative}
      .hero-main,.hero-side{padding:20px}
      .kefu-box{display:none}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 20px))}
      .hero{padding-top:18px}
      h1{font-size:2rem}
      .workflow{grid-template-columns:1fr}
      .form{grid-template-columns:1fr}
      .floating{right:12px; bottom:12px}
      .nav.open .nav-links{top:64px}
      .btn{width:100%}
      .hero-actions{flex-direction:column; align-items:stretch}
      .mini-stats{grid-template-columns:1fr}
    }