:root{
      --bg:#f4f7fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --line:#d9e1ef;
      --text:#172033;
      --muted:#5d6b82;
      --brand:#5b6cff;
      --brand2:#7c4dff;
      --brand3:#16b3b0;
      --accent:#ffb547;
      --shadow:0 18px 50px rgba(21, 35, 72, .10);
      --shadow2:0 10px 30px rgba(91,108,255,.16);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(124,77,255,.14), transparent 26%),
        radial-gradient(circle at 85% 10%, rgba(91,108,255,.12), transparent 20%),
        linear-gradient(180deg, #f7faff 0%, #f3f7fd 42%, #f5f8ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(18px);
      background:rgba(245,248,255,.76);
      border-bottom:1px solid rgba(217,225,239,.75);
    }
    .nav-wrap{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:44px;height:44px;object-fit:contain;background:#fff;border-radius:12px;padding:6px;box-shadow:0 8px 20px rgba(25,35,70,.08)}
    .brand h2{margin:0;font-size:16px;line-height:1.2}
    .brand p{margin:4px 0 0;font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px;font-size:14px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#344156;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover,.nav-links a:focus{background:rgba(91,108,255,.10);color:#24305a}
    .hero{padding:38px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.feature-card,.review-card,.faq-item,.article-card,.quote-card,.form-card,.compare-card,.timeline-card,.price-card,.tag-cloud,.network-card,.help-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(217,225,239,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main::before{
      content:"";position:absolute;inset:-40px -60px auto auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(91,108,255,.20), transparent 68%);
      pointer-events:none;
    }
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(91,108,255,.10);color:#3341a6;font-size:13px;font-weight:700}
    h1{margin:18px 0 14px;font-size:clamp(30px,4.4vw,54px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:#425069;font-size:16px;line-height:1.8;max-width:54ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:13px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;font-size:14px;
      transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease;
      will-change:transform;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow2)}
    .btn-secondary{background:#fff;border-color:var(--line);color:#24304e}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fbfcff,#f4f7ff);border:1px solid #e3eaf7}
    .point strong{display:block;font-size:18px}
    .point span{display:block;color:var(--muted);font-size:12px;margin-top:6px;line-height:1.5}
    .hero-side{padding:18px}
    .side-image{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .side-image img{border-radius:18px;aspect-ratio:1/1;object-fit:cover;border:1px solid #e9eef8}
    .mini-panel{margin-top:12px;padding:16px;border-radius:18px;background:linear-gradient(135deg,rgba(91,108,255,.08),rgba(22,179,176,.08));border:1px solid rgba(91,108,255,.12)}
    .mini-panel h3{margin:0 0 10px;font-size:16px}
    .mini-list{display:grid;gap:8px;margin:0;padding:0;list-style:none;color:#38445c;font-size:13px;line-height:1.6}
    .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}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .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}
    .section-card,.feature-card,.review-card,.faq-item,.article-card,.quote-card,.form-card,.compare-card,.timeline-card,.price-card,.network-card,.help-card{padding:20px}
    .feature-card h3,.review-card h3,.article-card h3,.help-card h3,.price-card h3,.network-card h3,.timeline-card h3,.compare-card h3,.quote-card h3{margin:0 0 10px;font-size:18px}
    .muted{color:var(--muted);line-height:1.75}
    .stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .stat{padding:18px;border-radius:18px;background:#fff;border:1px solid #e6ebf5;box-shadow:0 10px 24px rgba(25,35,70,.05)}
    .stat strong{display:block;font-size:24px;margin-bottom:8px}
    .stat span{color:var(--muted);font-size:13px;line-height:1.5}
    .chip-row{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid #dfe6f2;color:#35415a;font-size:13px}
    .compare-table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:18px}
    .compare-table th,.compare-table td{padding:14px 12px;border-bottom:1px solid #e8edf5;vertical-align:top;text-align:left;font-size:14px;line-height:1.65}
    .compare-table th{background:linear-gradient(180deg,#f8faff,#eef3ff);color:#22304d}
    .compare-table tr:last-child td{border-bottom:none}
    .rating{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .stars{color:#ffb400;letter-spacing:2px;font-size:18px}
    .accordion{display:grid;gap:12px}
    .faq-item button{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
      background:none;border:none;padding:0;color:var(--text);font-size:16px;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-item .answer{max-height:0;overflow:hidden;transition:max-height .28s ease;margin-top:0;color:var(--muted)}
    .faq-item.open .answer{max-height:180px;margin-top:12px}
    .faq-item .icon{transition:transform .25s ease}
    .faq-item.open .icon{transform:rotate(45deg)}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .review-role{font-size:13px;color:#5a6780}
    .review-card p{margin:0;color:#445268;line-height:1.75}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px solid #eef2f8}
    .article-item:last-child{border-bottom:none;padding-bottom:0}
    .article-item strong{display:block;font-size:15px;margin-bottom:6px}
    .article-item span{color:var(--muted);font-size:13px;line-height:1.6}
    .timeline{display:grid;gap:12px}
    .timeline-step{display:flex;gap:14px;align-items:flex-start;padding:14px;border-radius:16px;background:#fff;border:1px solid #e8eef8}
    .step-no{flex:0 0 34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,rgba(91,108,255,.14),rgba(22,179,176,.14));color:#3240b7;font-weight:800}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:block;font-size:13px;color:#3e4b61;margin-bottom:8px;font-weight:700}
    input,select,textarea{
      width:100%;padding:12px 14px;border-radius:14px;border:1px solid #dbe2ee;background:#fff;color:var(--text);
      outline:none;font:inherit;transition:border-color .18s ease,box-shadow .18s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(91,108,255,.6);box-shadow:0 0 0 4px rgba(91,108,255,.10)}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
    .footer{
      margin-top:18px;padding:24px 0 30px;border-top:1px solid rgba(217,225,239,.8);
      background:linear-gradient(180deg,rgba(247,249,255,.3),rgba(240,245,255,.7));
      color:#2b3850
    }
    .footer a{color:#243ea9}
    .footer-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:16px;align-items:start}
    .footer small{color:#5e6c84;line-height:1.7}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-tools a,.float-tools button{
      width:46px;height:46px;border-radius:14px;border:1px solid rgba(217,225,239,.9);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;color:#24304e;cursor:pointer
    }
    .float-contact{
      position:fixed;left:16px;bottom:16px;z-index:60;max-width:280px;background:#fff;border:1px solid rgba(217,225,239,.95);box-shadow:var(--shadow);border-radius:18px;padding:12px
    }
    .float-contact strong{display:block;font-size:14px;margin-bottom:8px}
    .float-contact .qr{display:flex;align-items:center;gap:10px}
    .float-contact img{width:72px;height:72px;object-fit:cover;border-radius:14px;border:1px solid #edf1f8}
    .tag-cloud,.price-card,.network-card,.help-card{height:100%}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid #e7edf7}
    .anchor-spacer{scroll-margin-top:92px}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:rgba(22,179,176,.10);color:#176e6c;font-size:12px;font-weight:700}
    .dot{width:8px;height:8px;border-radius:50%;background:var(--brand3);display:inline-block}
    .list{margin:0;padding-left:18px;color:#445268;line-height:1.8}
    .tag-grid{display:flex;flex-wrap:wrap;gap:10px}
    .tag-grid span{padding:8px 11px;border-radius:999px;background:#f7f9ff;border:1px solid #e2e8f5;font-size:13px;color:#30415c}
    .hero-side .logo-block{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid #e6ebf6;border-radius:18px;background:#fff}
    .hero-side .logo-block img{width:52px;height:52px;border-radius:14px}
    .logo-text strong{display:block;font-size:16px}
    .logo-text span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .note{font-size:13px;color:var(--muted);line-height:1.7}
    .link-list{display:grid;gap:10px}
    .link-list a{padding:10px 12px;border-radius:12px;background:#fff;border:1px solid #e5ebf4;color:#29406b}
    .site-main{padding-bottom:0}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.stats,.footer-grid,.two-col{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;width:100%;padding:10px 0 0;justify-content:flex-start}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .nav-wrap{flex-wrap:wrap}
      .hero-points{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .float-contact{display:none}
    }
    @media (max-width: 640px){
      .container{padding:0 14px}
      .hero{padding-top:24px}
      .hero-main{padding:22px}
      .section-head{flex-direction:column;align-items:flex-start}
      .compare-table th,.compare-table td{font-size:13px;padding:12px 10px}
      .float-tools{right:12px;bottom:12px}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
    .reveal.show{opacity:1;transform:none}