:root{
      --bg:#f5f8ff;
      --panel:#ffffff;
      --panel-2:#f1f6ff;
      --text:#13213a;
      --muted:#5c6b85;
      --primary:#0f3ea8;
      --primary-2:#1a6cff;
      --accent:#27b2ff;
      --line:rgba(15,62,168,.12);
      --shadow:0 18px 40px rgba(13,42,108,.10);
      --shadow-2:0 10px 24px rgba(13,42,108,.08);
      --radius:20px;
      --radius-sm:14px;
      --container: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(39,178,255,.10), transparent 26%),
        radial-gradient(circle at right 20%, rgba(26,108,255,.10), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f3f7ff 52%, #eef4ff 100%);
      overflow-x:hidden;
    }
    a{color:var(--primary);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(170%) blur(14px);
      background:rgba(245,248,255,.82);
      border-bottom:1px solid rgba(15,62,168,.08);
    }
    .nav-wrap{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;padding:4px;box-shadow:var(--shadow-2)}
    .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);margin-top:3px}
    .nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:#274063;padding:8px 0;position:relative}
    .nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary-2);transition:.25s}
    .nav a:hover::after{width:100%}
    .header-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;
      padding:12px 18px;font-weight:700;font-size:14px;cursor:pointer;
      transition:.25s ease;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary) 0%, var(--primary-2) 100%);color:#fff;box-shadow:0 12px 26px rgba(15,62,168,.22)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 32px rgba(15,62,168,.28)}
    .btn-ghost{background:#fff;color:var(--primary);border-color:rgba(15,62,168,.15)}
    .btn-ghost:hover{border-color:rgba(15,62,168,.3);transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid rgba(15,62,168,.15);border-radius:12px;padding:10px 12px;color:var(--primary)}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.card,.faq-item,.review,.compare-box,.form-card,.quote-box,.timeline-item,.article-card{
      background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:999px;pointer-events:none
    }
    .hero-main::before{width:180px;height:180px;right:-50px;top:-60px;background:radial-gradient(circle, rgba(39,178,255,.24), transparent 68%)}
    .hero-main::after{width:220px;height:220px;left:-90px;bottom:-110px;background:radial-gradient(circle, rgba(26,108,255,.12), transparent 64%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#edf4ff;color:var(--primary);border:1px solid rgba(15,62,168,.14);padding:8px 14px;border-radius:999px;font-size:13px;font-weight:700}
    h1{font-size:clamp(30px, 4vw, 50px);line-height:1.08;margin:18px 0 14px;color:#102443}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .mini-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .mini-tags span{padding:8px 12px;border-radius:999px;background:#f4f8ff;border:1px solid rgba(15,62,168,.10);color:#32507c;font-size:13px}
    .hero-side{padding:24px;display:grid;gap:14px}
    .quick-stat{padding:18px;border-radius:18px;background:linear-gradient(180deg,#f7fbff 0%, #edf4ff 100%);border:1px solid rgba(15,62,168,.10)}
    .quick-stat strong{display:block;font-size:30px;color:var(--primary)}
    .quick-stat span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .home-link{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:12px;background:#fff;border:1px solid rgba(15,62,168,.15);font-weight:700}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .section{padding:20px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}
    .section-head h2{font-size:28px;margin:0;color:#14284a}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .card{padding:22px;transition:.25s ease}
    .card:hover,.review:hover,.article-card:hover,.timeline-item:hover,.faq-item:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(13,42,108,.12)}
    .metric h3,.card h3,.review h3,.article-card h3{margin:0 0 8px;font-size:18px}
    .metric p,.card p,.review p,.article-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(15,62,168,.10),rgba(39,178,255,.16));color:var(--primary);margin-bottom:14px;font-weight:900
    }
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .section-card{padding:24px}
    .bullets{display:grid;gap:12px;margin:16px 0 0;padding:0;list-style:none}
    .bullets li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.7}
    .bullets li::before{content:"";width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));margin-top:8px;flex:0 0 auto}
    .brand-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .brand-strip span{background:#f3f7ff;border:1px solid rgba(15,62,168,.10);padding:8px 12px;border-radius:999px;font-size:13px;color:#29456f}
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:20px;border-radius:18px;background:linear-gradient(180deg,#fff 0%,#f5f9ff 100%);border:1px solid rgba(15,62,168,.10)}
    .step b{display:inline-flex;width:30px;height:30px;border-radius:10px;background:var(--primary);color:#fff;align-items:center;justify-content:center;margin-bottom:12px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid rgba(15,62,168,.12);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid rgba(15,62,168,.08);text-align:left;vertical-align:top}
    th{background:#f4f8ff;color:#12315f}
    td{color:#2d3f5e}
    .rating{display:grid;gap:14px}
    .rating .score{font-size:48px;line-height:1;color:var(--primary);font-weight:900}
    .stars{letter-spacing:2px;color:#ffb400;font-size:20px}
    .compare-box{padding:24px}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tags span{padding:7px 10px;border-radius:999px;background:#f4f8ff;border:1px solid rgba(15,62,168,.10);font-size:13px;color:#35507e}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:18px 20px}
    .timeline-item h3{margin:0 0 8px}
    .reviews,.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:20px}
    .review .role{color:var(--primary);font-weight:700;font-size:13px;margin-bottom:10px}
    .quote-box{padding:24px;background:linear-gradient(180deg,#f7fbff 0%, #eef5ff 100%)}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;border:0;background:transparent;color:var(--text);text-align:left;padding:18px 20px;font-size:16px;font-weight:800;display:flex;justify-content:space-between;gap:16px;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.active .faq-q .plus{transform:rotate(45deg)}
    .plus{transition:.25s}
    .form-card form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    input,select,textarea{
      width:100%;padding:14px 15px;border-radius:14px;border:1px solid rgba(15,62,168,.16);
      background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s
    }
    textarea{min-height:124px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(26,108,255,.5);box-shadow:0 0 0 4px rgba(26,108,255,.10)}
    .footer{
      margin-top:20px;padding:28px 0 18px;border-top:1px solid rgba(15,62,168,.10);
      background:#eef4ff;color:#213a61
    }
    .footer a{color:#1749b2}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer small,.footer p{color:#4d617e;line-height:1.8}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 14px 28px rgba(15,62,168,.22)
    }
    .chat-panel{
      position:fixed;right:16px;bottom:80px;z-index:60;width:min(320px, calc(100vw - 32px));
      background:#fff;border:1px solid rgba(15,62,168,.12);border-radius:20px;box-shadow:var(--shadow);padding:16px;display:none
    }
    .chat-panel.open{display:block;animation:fadeUp .24s ease}
    @keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
    .reveal{opacity:0;transform:translateY(14px);transition:.45s ease}
    .reveal.show{opacity:1;transform:translateY(0)}
    .subtle{color:var(--muted)}
    .badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#edf4ff;color:var(--primary);font-size:12px;font-weight:800}
    .gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .gallery .img-card{overflow:hidden;border-radius:18px;border:1px solid rgba(15,62,168,.12);background:#fff;box-shadow:var(--shadow)}
    .gallery .img-card img{width:100%;height:auto;display:block}
    .list-links{display:grid;gap:10px}
    .list-links a{padding:12px 14px;border-radius:14px;background:#f5f9ff;border:1px solid rgba(15,62,168,.10);color:#203a63}
    .tabs-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tabs-cloud a,.tabs-cloud span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid rgba(15,62,168,.12);color:#38547e;font-size:13px}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.two-col,.flow,.reviews,.articles,.footer-grid,.gallery{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open{display:flex;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid rgba(15,62,168,.12);border-radius:18px;padding:14px;flex-direction:column;align-items:flex-start;box-shadow:var(--shadow)}
      .header-cta{display:none}
      .mobile-only{display:flex}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .hero-main{padding:24px}
      .section-card,.card,.compare-box,.quote-box,.form-card{padding:18px}
      h1{font-size:30px}
      .section-head h2{font-size:24px}
      .hero-actions .btn{width:100%}
      .floating{right:12px;bottom:12px}
      .chat-panel{right:12px;bottom:74px}
    }