:root{
      --bg:#f5f9fb;
      --surface:#ffffff;
      --surface-2:#eef7fb;
      --text:#123043;
      --muted:#587286;
      --line:#d8e7ef;
      --primary:#0ea5b7;
      --primary-2:#2563eb;
      --accent:#14b8a6;
      --shadow:0 20px 50px rgba(18,48,67,.08);
      --radius:22px;
      --max:1200px;
    }
    *{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;background:linear-gradient(180deg,#eef9fb 0%,#f7fbfd 28%,#ffffff 100%);color:var(--text);line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(245,249,251,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,231,239,.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;border-radius:12px;background:#fff;padding:6px;border:1px solid var(--line)}
    .brand strong{display:block;font-size:18px;line-height:1.2}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.25s ease}
    .nav-links a:hover,.nav-links a:focus-visible{color:var(--text);background:#eaf6fb}
    .home-btn{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff!important;box-shadow:0 12px 24px rgba(14,165,183,.18)}
    .hero{padding:42px 0 18px;position:relative;overflow:hidden}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;background:radial-gradient(circle,rgba(20,184,166,.16),rgba(20,184,166,0) 68%)}
    .hero::before{width:320px;height:320px;right:-120px;top:-80px}
    .hero::after{width:220px;height:220px;left:-70px;top:120px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.section-card{background:rgba(255,255,255,.8);border:1px solid rgba(216,231,239,.9);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-copy{padding:30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#e8f8fb;color:#0b7285;font-weight:700;font-size:13px}
    h1{margin:14px 0 12px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:16px;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:14px;border:1px solid transparent;font-weight:700;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 16px 28px rgba(37,99,235,.16)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f9fcfd,#eef8fb);border:1px solid var(--line)}
    .stat strong{display:block;font-size:24px;line-height:1.1}
    .stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .hero-panel{padding:22px;display:grid;gap:14px;align-content:start}
    .hero-mini{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .mini{padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .mini h3{margin:0 0 6px;font-size:15px}
    .mini p{margin:0;color:var(--muted);font-size:13px}
    section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:68ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{padding:22px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;background:#eef8fb;border:1px solid var(--line);border-radius:999px;font-size:13px;color:#184b63}
    .feature-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
    .feature-list li{padding:12px 14px;border-radius:14px;background:#f8fcfd;border:1px solid var(--line)}
    .step-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f2fbfd);border:1px solid var(--line);position:relative}
    .step .num{font-weight:800;color:var(--primary);font-size:13px;letter-spacing:.08em}
    .step h3{margin:10px 0 8px;font-size:17px}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:900px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f3fbfd;color:#0f3d52;font-size:14px}
    td{color:var(--muted);font-size:14px}
    .rating{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}
    .score{padding:18px 20px;border-radius:18px;background:linear-gradient(135deg,#ecfeff,#eef2ff);border:1px solid #cfe9f2}
    .score strong{display:block;font-size:34px;color:#0f4f60}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{position:relative}
    .quote::before{content:"“";position:absolute;left:16px;top:8px;font-size:54px;color:#b2d8e5;line-height:1}
    .quote p{margin:18px 0 14px}
    .quote .meta{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:13px;color:var(--muted)}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline .node{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .faq{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 10px 26px rgba(18,48,67,.05)}
    summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{padding:0 18px 16px;margin:0;color:var(--muted)}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:20px}
    .article time{display:block;color:#0b7285;font-size:13px;font-weight:700;margin-bottom:8px}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    form{display:grid;gap:12px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text)}
    textarea{min-height:126px;resize:vertical}
    .submit{border:none;cursor:pointer}
    .contact-card{display:grid;gap:14px;align-content:start}
    .contact-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .contact-list li{padding:12px 14px;border-radius:14px;background:#f8fcfd;border:1px solid var(--line)}
    footer{margin-top:18px;background:#0f2431;color:#d5e9f1}
    footer a{color:#d5f6ff}
    .footer-inner{padding:28px 0;display:grid;gap:18px}
    .footer-top{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.06)}
    .footer-bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.12);padding-top:16px;font-size:13px;color:#b9d3de}
    .floating{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:60}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;min-width:54px;height:54px;padding:0 14px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 14px 28px rgba(37,99,235,.18)}
    .float-btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .modal-mask{position:fixed;inset:0;background:rgba(8,20,28,.46);display:none;align-items:center;justify-content:center;z-index:80;padding:16px}
    .modal-mask.show{display:flex}
    .modal{max-width:360px;width:100%;background:#fff;border-radius:22px;padding:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .modal img{width:100%;border-radius:16px}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .note{font-size:13px;color:var(--muted)}
    .image-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .image-card{overflow:hidden;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    .image-card img{width:100%;height:auto}
    .small{font-size:13px;color:var(--muted)}
    @media (max-width: 1024px){
      .hero-grid,.form-grid,.footer-top{grid-template-columns:1fr}
      .grid-4,.step-list,.timeline,.review-grid,.articles{grid-template-columns:repeat(2,1fr)}
      .grid-3{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:66px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:12px 14px}
      .hero{padding-top:24px}
      .hero-copy,.hero-panel,.card{padding:18px}
      .hero-stats,.hero-mini,.grid-3,.grid-4,.step-list,.timeline,.review-grid,.articles{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      .floating{right:12px;bottom:12px}
      .float-btn{min-width:50px;height:50px}
    }