:root{
      --bg:#f7f9fc;
      --panel:#ffffff;
      --panel-2:#f3f7ff;
      --line:#dbe3f0;
      --text:#172033;
      --muted:#5f6b82;
      --brand:#3366ff;
      --brand-2:#7c4dff;
      --accent:#ff7a59;
      --accent-2:#18b7a5;
      --shadow:0 18px 50px rgba(31,52,92,.12);
      --radius:20px;
      --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;
      background:
        radial-gradient(circle at top left, rgba(51,102,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(255,122,89,.10), transparent 24%),
        linear-gradient(180deg,#f9fbff 0%,#f4f8ff 46%,#f7f9fc 100%);
      color:var(--text);
      line-height:1.65;
    }
    a{color:inherit;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(180%) blur(18px);
      background:rgba(247,249,252,.82);
      border-bottom:1px solid rgba(219,227,240,.7);
    }
    .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 img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:6px}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;letter-spacing:.5px}
    .brand-text span{display:block;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:18px;flex-wrap:wrap;justify-content:flex-end;
      font-size:14px;color:#33415c
    }
    .nav-links a{padding:6px 0;position:relative;white-space:nowrap}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:.25s ease
    }
    .nav-links a:hover::after{width:100%}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:14px;padding:12px 18px;font-weight:700;cursor:pointer;
      transition:transform .2s ease,box-shadow .2s ease,background .2s ease,opacity .2s ease;
      box-shadow:none
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 30px rgba(51,102,255,.22)}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .hero{padding:34px 0 12px}
    .hero-grid{
      display:grid;grid-template-columns:1.28fr .72fr;gap:20px;align-items:stretch
    }
    .hero-main,.hero-side,.section-card,.feature-card,.quote-card,.faq-item,.compare-card,.form-card,.article-card,.review-card,.price-card,.timeline-card,.case-card,.help-card,.network-card,.table-card{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(219,227,240,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main::before{
      content:"";position:absolute;inset:auto -60px -60px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(51,102,255,.16), transparent 68%);
      pointer-events:none
    }
    .hero-main::after{
      content:"";position:absolute;inset:18px 18px auto auto;width:110px;height:110px;border-radius:24px;
      background:linear-gradient(135deg,rgba(124,77,255,.12),rgba(24,183,165,.10));
      transform:rotate(18deg);pointer-events:none
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;background:rgba(51,102,255,.09);color:#1f4ad7;font-size:13px;font-weight:700
    }
    h1{margin:14px 0 12px;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.02em}
    .hero-copy{font-size:16px;color:var(--muted);max-width:54ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-stat{
      background:linear-gradient(180deg,#fff, #f6f9ff);
      border:1px solid var(--line);border-radius:16px;padding:14px
    }
    .mini-stat b{display:block;font-size:20px;color:#15213a}
    .mini-stat span{display:block;font-size:13px;color:var(--muted)}
    .hero-side{padding:20px;display:flex;flex-direction:column;gap:14px}
    .side-badge{
      background:linear-gradient(135deg,rgba(255,122,89,.14),rgba(51,102,255,.10));
      border-radius:18px;padding:18px
    }
    .side-badge strong{display:block;font-size:18px}
    .side-badge p{margin:8px 0 0;color:var(--muted);font-size:14px}
    .service-tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#30405f
    }
    section{padding:18px 0}
    .section-card{padding:24px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:18px;flex-wrap:wrap}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:68ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .feature-card,.review-card,.article-card,.help-card,.case-card,.network-card,.price-card,.timeline-card,.compare-card,.form-card{padding:18px}
    .feature-card h3,.review-card h3,.article-card h3,.help-card h3,.case-card h3,.network-card h3,.price-card h3,.timeline-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.review-card p,.article-card p,.help-card p,.case-card p,.network-card p,.price-card p,.timeline-card p{margin:0;color:var(--muted)}
    .icon-dot{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(51,102,255,.14),rgba(124,77,255,.14));color:#2d57e6;font-weight:900;margin-bottom:12px
    }
    .process{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7faff);
      border:1px solid var(--line);position:relative
    }
    .step b{display:inline-flex;width:32px;height:32px;border-radius:10px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;margin-bottom:12px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:760px;background:#fff}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5f8ff;font-size:14px;color:#294066}
    td{font-size:14px;color:#31415b}
    .rating{
      display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:12px 0 0
    }
    .stars{color:#ffb020;letter-spacing:2px;font-size:20px}
    .badge{
      display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:rgba(24,183,165,.10);color:#0c7d72;font-size:13px;font-weight:700
    }
    .compare-note{margin-top:12px;color:var(--muted);font-size:14px}
    .columns{
      display:grid;grid-template-columns:1.02fr .98fr;gap:14px;align-items:start
    }
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#23314c}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;
      font:inherit;background:#fff;color:var(--text);outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(51,102,255,.55);box-shadow:0 0 0 4px rgba(51,102,255,.10)}
    .full{grid-column:1 / -1}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:8px}
    .small{font-size:13px;color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px;background:#fff;border:none;color:var(--text);text-align:left;
      display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:16px;font-weight:700;cursor:pointer
    }
    .faq-a{padding:0 18px 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-arrow{transition:transform .25s ease}
    .faq-item.active .faq-arrow{transform:rotate(180deg)}
    .reviews,.articles,.cases,.networks,.help-grid,.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px;color:var(--muted);font-size:13px}
    .list{margin:0;padding-left:18px;color:var(--muted)}
    .list li{margin:6px 0}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:14px
    }
    .timeline{display:grid;gap:12px}
    .timeline-item{
      display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start
    }
    .timeline-item .dot{
      width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));
      color:#fff;display:grid;place-items:center;font-weight:800
    }
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:50%;border:none;cursor:pointer;
      box-shadow:0 14px 28px rgba(22,42,75,.18);display:grid;place-items:center;font-size:18px
    }
    .floating .kf{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
    .floating .top{background:#fff;color:var(--text);border:1px solid var(--line)}
    footer{
      margin-top:18px;background:#f1f5fb;border-top:1px solid var(--line);color:#24324a
    }
    .footer-inner{padding:26px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .footer-links{display:flex;flex-wrap:wrap;gap:12px}
    .footer-links a{padding:6px 0;color:#26406b}
    .copyright{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:#5f6b82}
    .kefu-box{
      display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:center
    }
    .kefu-box img{width:120px;height:120px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .muted{color:var(--muted)}
    .scroll-reveal{opacity:0;transform:translateY(16px);transition:all .6s ease}
    .scroll-reveal.visible{opacity:1;transform:none}
    .site-header .home-link{font-weight:700;color:#1d4ed8}
    .banner-strip{
      display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:14px
    }
    .banner-strip img{width:100%;border-radius:18px;border:1px solid var(--line);box-shadow:0 12px 26px rgba(31,52,92,.10)}
    @media (max-width: 1024px){
      .hero-grid,.columns,.footer-grid,.split,.grid-4,.grid-3,.reviews,.articles,.cases,.networks,.help-grid,.price-grid,.process{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr 1fr 1fr}
    }
    @media (max-width: 760px){
      .nav{flex-wrap:wrap}
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none;width:100%;padding-top:8px;justify-content:flex-start;gap:12px
      }
      .nav-links.open{display:flex}
      .hero-grid,.columns,.footer-grid,.split,.grid-4,.grid-3,.reviews,.articles,.cases,.networks,.help-grid,.price-grid,.process,.hero-points,.banner-strip,.grid-2,.form-grid{grid-template-columns:1fr}
      .hero-main,.hero-side,.section-card{padding:20px}
      h1{font-size:clamp(28px,10vw,40px)}
      .section-head h2{font-size:24px}
      .kefu-box{grid-template-columns:1fr}
      .hero-actions,.form-actions{flex-direction:column;align-items:stretch}
      .btn{width:100%}
    }