:root{
      --bg:#f6f7fb;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#1f2430;
      --muted:#5f687a;
      --line:#dfe5f1;
      --brand:#1358ff;
      --brand2:#ff4d7d;
      --accent:#ffb800;
      --green:#1f9d66;
      --shadow:0 18px 45px rgba(19,88,255,.12);
      --shadow2:0 12px 28px rgba(255,77,125,.12);
      --radius:22px;
      --radius-sm:16px;
      --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;
      background:
        radial-gradient(circle at top left, rgba(255,77,125,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(19,88,255,.10), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, #f6f7fb 42%, #f8faff 100%);
      color:var(--text);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--max)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter: blur(14px);
      background:rgba(246,247,251,.88);
      border-bottom:1px solid rgba(223,229,241,.85);
    }
    .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;border-radius:12px;background:#fff;box-shadow:0 8px 18px rgba(0,0,0,.06)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover,.nav-links a.active{background:rgba(19,88,255,.08);color:var(--brand)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn,.btn-outline{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;font-weight:700;font-size:14px;transition:.25s;
      border:1px solid transparent;cursor:pointer;white-space:nowrap
    }
    .btn{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow2)}
    .btn:hover{transform:translateY(-2px);filter:saturate(1.05)}
    .btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-outline:hover{border-color:rgba(19,88,255,.35);color:var(--brand);transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{
      position:relative;overflow:hidden;padding:34px 0 18px;
    }
    .hero::before{
      content:"";position:absolute;inset:0;
      background:
        linear-gradient(135deg, rgba(19,88,255,.09), transparent 32%),
        linear-gradient(315deg, rgba(255,77,125,.08), transparent 36%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;
      display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:stretch;
      padding:18px 0 10px;
    }
    .hero-copy,.hero-panel,.section-card,.faq-item,.review-card,.article-card,.case-card,.service-card,.compare-card,.form-card,.timeline-card,.price-card,.network-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(223,229,241,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-copy{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(19,88,255,.08);color:var(--brand);padding:8px 12px;border-radius:999px;font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(32px,5vw,56px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.9;max-width:58ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{
      padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f7f9ff);
      border:1px solid var(--line);
    }
    .point b{display:block;font-size:15px;margin-bottom:5px}
    .point span{color:var(--muted);font-size:13px;line-height:1.6}
    .hero-panel{padding:26px;display:grid;gap:14px;align-content:start;background:
      linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,250,255,.95));
    }
    .hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{
      padding:18px;border-radius:18px;background:
      linear-gradient(135deg, rgba(19,88,255,.08), rgba(255,77,125,.08));
      border:1px solid rgba(19,88,255,.12)
    }
    .metric strong{display:block;font-size:26px}
    .metric span{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.5}
    .hero-list{display:grid;gap:10px}
    .hero-list div{display:flex;gap:10px;align-items:flex-start;color:var(--muted);font-size:14px;line-height:1.65}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-top:6px;flex:0 0 auto}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);line-height:1.8;max-width:62ch}
    .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,.service-card,.case-card,.review-card,.article-card,.compare-card,.form-card,.timeline-card,.price-card,.network-card{padding:22px}
    .service-card h3,.case-card h3,.review-card h3,.article-card h3,.compare-card h3,.form-card h3,.timeline-card h3,.price-card h3,.network-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.case-card p,.review-card p,.article-card p,.compare-card p,.form-card p,.timeline-card p,.price-card p,.network-card p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .tag-cloud,.chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#30405f}
    .accent-chip{background:rgba(255,77,125,.08);border-color:rgba(255,77,125,.16);color:#a21f4c}
    .blue-chip{background:rgba(19,88,255,.08);border-color:rgba(19,88,255,.16);color:#1348b5}
    .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{
      padding:18px;border-radius:20px;border:1px solid var(--line);background:linear-gradient(180deg,#fff, #f8fbff);position:relative
    }
    .step b{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;margin-bottom:10px}
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:14px}
    th{background:#f7f9ff;color:#2a3550}
    tr:last-child td{border-bottom:none}
    .good{color:var(--green);font-weight:700}
    .bad{color:#b53b3b;font-weight:700}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:transparent;border:0;padding:18px 20px;font-size:15px;font-weight:700;color:var(--text);cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;border-top:1px solid transparent}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px;border-top-color:var(--line)}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
    .stars{color:#ffac2f;letter-spacing:2px;font-size:18px}
    .review-role{font-size:13px;color:var(--muted)}
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:72px 1fr;gap:14px;align-items:start;padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .timeline-item .time{font-weight:800;color:var(--brand)}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-card .meta{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
    .article-card a.more{display:inline-flex;margin-top:14px;color:var(--brand);font-weight:700}
    .case-card .case-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}
    .case-card .badge{padding:7px 10px;border-radius:999px;background:rgba(31,157,102,.10);color:var(--green);font-size:12px;font-weight:700}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#31405b}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;
      padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(19,88,255,.5);box-shadow:0 0 0 4px rgba(19,88,255,.10)}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:16px}
    .help-box{padding:18px;border-radius:18px;background:linear-gradient(135deg, rgba(19,88,255,.08), rgba(255,180,0,.08));border:1px solid rgba(19,88,255,.12)}
    .footer{
      margin-top:12px;padding:24px 0 30px;border-top:1px solid var(--line);
      background:#f8faff;color:var(--text)
    }
    .footer a{color:var(--brand)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer small,.footer p{color:var(--muted);line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .float-box{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-width:54px;height:54px;padding:0 16px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand2));
      color:#fff;box-shadow:var(--shadow2);font-weight:800;border:0;cursor:pointer
    }
    .float-panel{
      width:280px;display:none;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)
    }
    .float-panel img{width:100%;border-radius:14px;border:1px solid var(--line)}
    .float-panel p{margin:10px 0 0;color:var(--muted);font-size:13px;line-height:1.6}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.65s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .rating-box{display:grid;gap:12px}
    .rating-score{display:flex;align-items:baseline;gap:12px}
    .rating-score strong{font-size:42px;line-height:1;color:var(--brand)}
    .rating-score span{color:var(--muted);font-size:14px}
    .center-note{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.articles,.footer-grid,.steps{grid-template-columns:1fr}
      .hero-copy,.hero-panel{padding:24px}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:68px;flex-direction:column;align-items:stretch;
        background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)
      }
      .nav.open .nav-links a{padding:12px 14px}
      .form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
      .hero-points{grid-template-columns:1fr}
      .hero-metrics{grid-template-columns:1fr 1fr}
      .float-panel{width:250px}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 20px, var(--max))}
      .hero{padding-top:18px}
      .brand strong{font-size:16px}
      .hero-metrics{grid-template-columns:1fr}
      .nav-actions .btn-outline{display:none}
      .section-head{flex-direction:column;align-items:start}
      .timeline-item{grid-template-columns:1fr}
      .table-wrap{border-radius:16px}
      th,td{padding:12px}
    }