:root{
      --bg:#f5f8ff;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#122033;
      --muted:#5f6e85;
      --blue:#1358ff;
      --blue2:#0b2e83;
      --line:#dbe5f5;
      --accent:#25a7ff;
      --shadow:0 18px 50px rgba(18,32,51,.08);
      --radius:20px;
      --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(19,88,255,.12), transparent 28%),
      radial-gradient(circle at 85% 12%, rgba(37,167,255,.12), transparent 22%),
      linear-gradient(180deg,var(--bg),#fff 55%, #f7faff 100%);}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(calc(100% - 32px),var(--max));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:40;background:rgba(245,248,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,229,245,.8)}
    .header-inner{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:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 22px rgba(19,88,255,.12)}
    .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-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:10px}
    .nav a:hover,.nav a:focus{background:#edf4ff;color:var(--blue)}
    .cta-btn,.ghost-btn,.primary-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:14px;padding:12px 18px;font-weight:700;transition:.22s ease;border:1px solid transparent;cursor:pointer}
    .primary-btn{background:linear-gradient(135deg,var(--blue),#39a8ff);color:#fff;box-shadow:0 14px 30px rgba(19,88,255,.22)}
    .primary-btn:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(19,88,255,.28)}
    .ghost-btn{background:#fff;border-color:var(--line);color:var(--blue2)}
    .ghost-btn:hover{transform:translateY(-2px);border-color:#b8caf2}
    .hero{padding:42px 0 14px;position:relative}
    .hero-grid{display:grid;grid-template-columns:1.25fr .92fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-panel,.section-card,.price-card,.faq-item,.review-card,.article-card,.service-card,.step-card,.compare-card,.form-card,.case-card,.info-card,.tag-cloud,.timeline-card,.network-card,.help-card{background:var(--card);border:1px solid rgba(219,229,245,.95);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy:before{content:"";position:absolute;inset:auto -40px -60px auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(19,88,255,.16),transparent 70%);pointer-events:none}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#edf4ff;color:var(--blue2);font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,4.6vw,54px);line-height:1.08;margin:18px 0 14px;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);margin:0 0 22px;max-width:56ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .mini{padding:14px 14px 12px;border-radius:16px;background:linear-gradient(180deg,#f8fbff,#edf4ff);border:1px solid #dce7f8}
    .mini strong{display:block;font-size:20px;color:var(--blue2)}
    .mini span{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.55}
    .hero-panel{padding:24px}
    .panel-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
    .panel-top h2{font-size:18px;margin:0}
    .score{font-weight:800;color:var(--blue);background:#edf4ff;border-radius:999px;padding:8px 12px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:16px;background:linear-gradient(180deg,#ffffff,#f4f8ff);border:1px solid #deebff}
    .stat strong{display:block;font-size:22px;margin-bottom:4px;color:var(--blue2)}
    .stat span{color:var(--muted);font-size:13px;line-height:1.5}
    section{padding:14px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:0 0 16px}
    .section-head h2{font-size:28px;margin:0}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:62ch}
    .section-card{padding:28px}
    .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}
    .service-card,.case-card,.article-card,.review-card,.faq-item,.help-card,.info-card,.network-card,.timeline-card,.price-card,.compare-card,.form-card{padding:20px}
    .service-card h3,.case-card h3,.article-card h3,.review-card h3,.help-card h3,.info-card h3,.network-card h3,.timeline-card h3,.price-card h3{margin:0 0 10px;font-size:18px}
    .muted{color:var(--muted);line-height:1.75}
    .pill{display:inline-flex;gap:8px;flex-wrap:wrap;margin-top:12px}
    .pill span,.tag{border:1px solid #dce7f8;background:#f7fbff;color:var(--blue2);padding:7px 10px;border-radius:999px;font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step-card{padding:18px;position:relative}
    .step-card strong{display:block;font-size:15px;margin-bottom:8px;color:var(--blue2)}
    .step-no{width:34px;height:34px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),#39a8ff);color:#fff;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;background:#fff;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid #e7eef9;text-align:left;vertical-align:top}
    th{background:#f3f7ff;color:var(--blue2);font-size:14px}
    td{color:var(--text);font-size:14px;line-height:1.7}
    .rating{font-weight:800;color:var(--blue)}
    .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:14px;background:#fff;border:0;padding:18px 20px;font:inherit;color:var(--text);text-align:left;cursor:pointer}
    .faq-q strong{font-size:16px}
    .faq-a{padding:0 20px 18px;color:var(--muted);line-height:1.8;display:none}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .faq-q{background:#f5f9ff}
    .toggle{font-size:22px;color:var(--blue)}
    .reviews,.articles,.cases,.help-grid,.info-grid,.network-grid,.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;color:var(--muted);font-size:13px}
    .stars{color:#ffb400;font-size:15px;letter-spacing:1px}
    .article-card a{display:inline-flex;margin-top:12px;color:var(--blue);font-weight:700}
    .form-card 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}
    label{font-size:14px;font-weight:700;color:var(--blue2)}
    input,select,textarea{width:100%;border:1px solid #d5e1f3;border-radius:14px;padding:13px 14px;background:#fff;color:var(--text);font:inherit;outline:none}
    input:focus,select:focus,textarea:focus{border-color:#7fb0ff;box-shadow:0 0 0 4px rgba(19,88,255,.08)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{grid-column:1/-1;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
    .submit-row .muted{font-size:13px}
    .tag-cloud{padding:20px;display:flex;gap:10px;flex-wrap:wrap}
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:70px 1fr;gap:14px;align-items:start;padding:16px;border-radius:16px;background:#f8fbff;border:1px solid #dce7f8}
    .timeline-item b{color:var(--blue2)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),#37b3ff);color:#fff;box-shadow:0 16px 30px rgba(19,88,255,.24);font-weight:800}
    .float-btn.secondary{background:#fff;color:var(--blue2);border:1px solid var(--line)}
    .footer{margin-top:10px;padding:26px 0 34px;background:#f2f6ff;border-top:1px solid #dbe5f5;color:var(--text)}
    .footer a{color:var(--blue2)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
    .footer small{color:var(--muted);line-height:1.75}
    .footer .links{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
    .footer .links a{padding:8px 10px;border-radius:10px;background:#fff;border:1px solid #dbe5f5}
    .reveal{opacity:0;transform:translateY(16px);transition:.7s ease}
    .reveal.visible{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.cases,.help-grid,.info-grid,.network-grid,.price-grid,.workflow,.footer-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-toggle{display:inline-flex}
      .nav{display:none;position:absolute;left:16px;right:16px;top:66px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow)}
      .nav.open{display:flex;flex-direction:column;align-items:stretch}
      .nav a,.nav .cta-btn{width:100%;justify-content:center}
      .header-inner{position:relative}
      .mobile-only{display:inline-flex}
      .form-card form{grid-template-columns:1fr}
    }