:root{
      --bg:#f4f8fc;
      --bg2:#eef5ff;
      --card:#ffffff;
      --line:#dbe7f4;
      --text:#1e2a39;
      --muted:#5d6b7b;
      --brand:#1f7ae0;
      --brand2:#29b7ff;
      --accent:#14b8a6;
      --warm:#ffb84d;
      --shadow:0 16px 40px rgba(24, 54, 94, .10);
      --radius:22px;
      --radius-sm:16px;
      --max: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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(41,183,255,.16), transparent 28%),
        radial-gradient(circle at top right, rgba(31,122,224,.10), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f3f8fe 58%, #eef4fb 100%);
      line-height:1.65;
      overflow-x:hidden;
    }
    img{max-width:100%;display:block}
    a{color:inherit;text-decoration:none}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(248,251,255,.82);
      border-bottom:1px solid rgba(219,231,244,.8);
    }
    .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 img{width:42px; height:42px; object-fit:contain}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:18px; letter-spacing:.5px}
    .brand-text span{display:block; font-size:12px; color:var(--muted)}
    .nav-links{
      display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end;
      font-size:14px; color:#304050;
    }
    .nav-links a{padding:8px 10px; border-radius:999px; transition:.2s ease}
    .nav-links a:hover{background:#e9f3ff; color:var(--brand)}
    .nav-cta{display:flex; align-items:center; gap:10px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:1px solid transparent; border-radius:999px;
      padding:12px 18px; font-weight:700; font-size:14px;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
      cursor:pointer;
    }
    .btn:hover{transform:translateY(-1px); box-shadow:var(--shadow)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .menu-btn{display:none; background:#fff; border:1px solid var(--line); color:var(--text)}
    main{display:block}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.2fr .8fr; gap:22px; align-items:stretch;
    }
    .hero-panel, .info-panel, .card, .faq-item, .review, .step, .article, .form-panel, .contact-panel, .compare-box, .price-box, .timeline, .network-panel, .quiz-panel{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(219,231,244,.95);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-panel{padding:32px; position:relative; overflow:hidden}
    .hero-panel::after{
      content:""; position:absolute; inset:auto -40px -70px auto; width:240px; height:240px;
      background:radial-gradient(circle, rgba(41,183,255,.28), rgba(41,183,255,0) 64%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:8px 12px; border-radius:999px;
      background:#edf6ff; color:#1f5fa8; font-size:13px; font-weight:700;
      border:1px solid #dcecff;
    }
    h1{
      margin:16px 0 14px;
      font-size:clamp(30px, 5vw, 52px);
      line-height:1.12;
      letter-spacing:-.6px;
    }
    .lead{font-size:16px; color:var(--muted); max-width:62ch; margin:0 0 20px}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:22px 0 22px}
    .hero-stats{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px}
    .stat{
      padding:14px; border-radius:18px; background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid var(--line);
    }
    .stat strong{display:block; font-size:20px; color:var(--brand)}
    .stat span{display:block; font-size:12px; color:var(--muted)}
    .hero-aside{display:grid; gap:14px}
    .info-panel{padding:22px}
    .mini-title{margin:0 0 10px; font-size:18px}
    .pill-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .pill{
      padding:9px 12px; border-radius:999px; background:#f3f8ff; border:1px solid #deebfb;
      font-size:13px; color:#33506c;
    }
    .hero-aside .brand-cover{
      padding:18px; display:grid; gap:14px; align-content:start;
      background:linear-gradient(180deg, #ffffff 0%, #f6fbff 100%);
    }
    section{padding:18px 0}
    .section-head{
      display:flex; align-items:flex-end; justify-content:space-between; gap:14px; margin-bottom:16px;
    }
    .section-head h2{margin:0; font-size:clamp(22px, 3vw, 34px); line-height:1.2}
    .section-head p{margin:0; color:var(--muted); max-width:66ch}
    .grid-3{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .grid-4{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px}
    .card{padding:20px}
    .card h3{margin:10px 0 8px; font-size:18px}
    .card p,.card li{color:var(--muted)}
    .card ul{margin:10px 0 0; padding-left:18px}
    .icon{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(31,122,224,.12), rgba(41,183,255,.18));
      color:var(--brand); font-weight:800;
    }
    .split{
      display:grid; grid-template-columns:1fr 1fr; gap:16px; align-items:start;
    }
    .workflow{
      display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px;
    }
    .step{padding:18px}
    .step b{
      display:inline-flex; width:28px; height:28px; border-radius:999px; align-items:center; justify-content:center;
      background:#e9f4ff; color:var(--brand); margin-bottom:12px;
    }
    .table-wrap{overflow-x:auto; border-radius:var(--radius)}
    table{width:100%; border-collapse:collapse; min-width:860px; background:#fff}
    th,td{padding:14px 16px; text-align:left; border-bottom:1px solid var(--line); vertical-align:top}
    th{background:#f4f9ff; color:#223244}
    tbody tr:hover{background:#fafcff}
    .badge{
      display:inline-flex; align-items:center; gap:6px; padding:6px 10px;
      background:#edf7ff; color:#1f5fa8; border-radius:999px; font-size:12px; font-weight:700;
    }
    .compare-box{padding:22px}
    .rating{
      display:flex; gap:12px; flex-wrap:wrap; margin-top:14px
    }
    .rating .tile{
      flex:1 1 180px; padding:16px; border-radius:18px; background:#f8fbff; border:1px solid var(--line)
    }
    .rating .tile strong{display:block; font-size:24px; color:var(--brand)}
    .network{
      display:grid; grid-template-columns:1.05fr .95fr; gap:16px;
    }
    .timeline{padding:22px}
    .timeline-item{
      display:grid; grid-template-columns:18px 1fr; gap:14px; align-items:start; margin-top:16px
    }
    .dot{width:12px; height:12px; border-radius:999px; background:linear-gradient(135deg,var(--brand),var(--accent)); margin-top:6px; box-shadow:0 0 0 6px rgba(31,122,224,.08)}
    .review-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .review{padding:20px}
    .review .meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px}
    .stars{color:#f4b400; letter-spacing:1px}
    .article-list{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .article{padding:18px}
    .article time{display:block; color:var(--muted); font-size:12px; margin-bottom:8px}
    .article a.title{display:block; font-weight:800; font-size:17px; margin-bottom:8px}
    .article p{margin:0; color:var(--muted)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud .tag{
      padding:10px 12px; background:#f5f9ff; border:1px solid var(--line); border-radius:999px; color:#304050; font-size:13px;
    }
    .faq-list{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; display:flex; align-items:center; justify-content:space-between; gap:12px;
      padding:18px 20px; border:none; background:transparent; color:var(--text); font-size:16px; text-align:left; cursor:pointer;
    }
    .faq-a{padding:0 20px 18px; color:var(--muted); display:none}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .faq-q{border-bottom:1px solid var(--line)}
    .faq-q span{font-weight:700}
    .form-panel, .contact-panel{padding:22px}
    form{display:grid; gap:14px}
    .form-row{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px}
    label{display:grid; gap:7px; font-size:14px; color:#2b3948}
    input, select, textarea{
      width:100%; border:1px solid #cfdceb; border-radius:14px; background:#fff; color:var(--text);
      padding:12px 14px; font:inherit; outline:none; transition:border-color .2s ease, box-shadow .2s ease;
    }
    input:focus, select:focus, textarea:focus{border-color:rgba(31,122,224,.65); box-shadow:0 0 0 4px rgba(31,122,224,.10)}
    textarea{min-height:120px; resize:vertical}
    .footer{
      margin-top:18px; padding:24px 0 28px; border-top:1px solid rgba(219,231,244,.85);
      background:rgba(245,249,253,.9); color:#314255;
    }
    .footer a{color:#1f5fa8}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .8fr; gap:16px}
    .footer small, .footer p{color:#556579}
    .footer-bottom{margin-top:16px; display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:space-between}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:18px; border:none; display:grid; place-items:center;
      box-shadow:var(--shadow); background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; cursor:pointer;
    }
    .float-kefu{
      position:fixed; left:16px; bottom:16px; z-index:60; width:min(280px, calc(100vw - 32px));
      background:#fff; border:1px solid var(--line); border-radius:20px; box-shadow:var(--shadow); overflow:hidden;
    }
    .kefu-head{padding:12px 14px; background:#f4f9ff; border-bottom:1px solid var(--line); font-weight:800}
    .kefu-body{padding:14px; display:grid; gap:10px; color:var(--muted)}
    .kefu-body img{width:100%; border-radius:14px; border:1px solid var(--line)}
    .mobile-toggle{display:none}
    .scroll-reveal{opacity:0; transform:translateY(14px); transition:.6s ease}
    .scroll-reveal.visible{opacity:1; transform:none}
    .rating-stars{font-size:20px; color:#ffb400; letter-spacing:2px}
    .price-box{padding:20px}
    .price-note{color:var(--muted); margin:8px 0 0}
    .center{display:flex; gap:12px; flex-wrap:wrap; align-items:center}
    .subtle{color:var(--muted)}
    .home-link{font-weight:800}
    @media (max-width: 1024px){
      .hero-grid,.network,.split,.footer-grid{grid-template-columns:1fr}
      .grid-4,.grid-3,.workflow,.review-grid,.article-list{grid-template-columns:repeat(2,minmax(0,1fr))}
      .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width: 760px){
      .nav{flex-wrap:wrap}
      .nav-links{display:none; width:100%; padding:10px 0 0}
      .nav-links.open{display:flex; flex-direction:column; align-items:flex-start; gap:4px}
      .nav-links a{width:100%}
      .menu-btn{display:inline-flex}
      .nav-cta{margin-left:auto}
      .mobile-toggle{display:inline-flex}
      .hero-panel{padding:24px}
      .grid-4,.grid-3,.workflow,.review-grid,.article-list,.form-row{grid-template-columns:1fr}
      .hero-stats{grid-template-columns:1fr 1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .float-kefu{display:none}
      .container{width:min(var(--max), calc(100% - 24px))}
    }