:root{
      --bg:#f5f8ff;
      --bg2:#eef4ff;
      --card:#ffffff;
      --card2:#f8fbff;
      --line:#dbe5f4;
      --text:#132238;
      --muted:#5f6f86;
      --brand:#2f6bff;
      --brand2:#11b8c8;
      --accent:#ffb84d;
      --shadow:0 18px 50px rgba(22,46,92,.10);
      --shadow2:0 10px 30px rgba(38,74,156,.12);
      --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(900px 420px at 12% 0%, rgba(47,107,255,.12), transparent 60%),
        radial-gradient(700px 320px at 88% 8%, rgba(17,184,200,.14), transparent 58%),
        linear-gradient(180deg, #f8fbff 0%, #f4f7fd 52%, #f6f8ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
    .topbar,.site-header,.site-footer{position:relative;z-index:2}
    .topbar{
      background:rgba(255,255,255,.72);
      backdrop-filter:blur(12px);
      border-bottom:1px solid rgba(219,229,244,.8);
    }
    .topbar .container{
      display:flex;align-items:center;justify-content:space-between;gap:14px;
      padding:10px 0;font-size:14px;color:var(--muted)
    }
    .brand-row{display:flex;align-items:center;gap:12px;min-width:0}
    .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;color:var(--text);font-size:16px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .utility-links{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .utility-links a{padding:7px 12px;border:1px solid rgba(47,107,255,.14);border-radius:999px;background:#fff;color:var(--text)}
    .site-header{background:rgba(255,255,255,.7);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,229,244,.9)}
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
    .nav-brand{display:flex;align-items:center;gap:12px;min-width:0}
    .nav-title{font-size:18px;font-weight:800;letter-spacing:.2px}
    .nav-sub{font-size:12px;color:var(--muted);margin-top:4px}
    .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:8px;flex-wrap:wrap;justify-content:flex-end}
    nav a{
      padding:10px 13px;border-radius:12px;color:var(--text);font-size:14px;font-weight:600;
      transition:.22s ease;background:transparent
    }
    nav a:hover,.nav-active{background:linear-gradient(135deg, rgba(47,107,255,.12), rgba(17,184,200,.12));color:#1740a0}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;transition:.22s ease;
      cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg, var(--brand), #5d8cff);color:#fff;box-shadow:0 14px 28px rgba(47,107,255,.24)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 18px 34px rgba(47,107,255,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-1px);box-shadow:var(--shadow2)}
    .hero{padding:26px 0 8px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch
    }
    .hero-panel,.info-panel,.card,.section-box,.faq-item,.review-card,.article-item,.contact-panel,.compare-panel{
      background:rgba(255,255,255,.82);backdrop-filter:blur(10px);border:1px solid rgba(219,229,244,.9);
      border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-panel{padding:34px;position:relative;overflow:hidden}
    .hero-panel::before,.hero-panel::after{
      content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none
    }
    .hero-panel::before{width:260px;height:260px;right:-95px;top:-70px;background:radial-gradient(circle, rgba(47,107,255,.18), rgba(47,107,255,0) 68%)}
    .hero-panel::after{width:220px;height:220px;left:-85px;bottom:-100px;background:radial-gradient(circle, rgba(17,184,200,.16), rgba(17,184,200,0) 68%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(47,107,255,.1);color:#2049b3;font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.04;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);line-height:1.8;font-size:16px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .hero-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
    .chip{padding:9px 12px;border-radius:999px;background:#f1f6ff;border:1px solid #dbe6fa;color:#25406e;font-size:13px;font-weight:600}
    .hero-side{display:grid;gap:16px}
    .hero-stat{
      padding:22px 22px 20px;background:linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
      border-radius:var(--radius);border:1px solid rgba(219,229,244,.95);box-shadow:var(--shadow2)
    }
    .hero-stat strong{display:block;font-size:28px;line-height:1;color:#103b8a}
    .hero-stat span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.6}
    .mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .mini{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff 0%, #f8fbff 100%);
      border:1px solid var(--line);box-shadow:0 10px 22px rgba(31,64,129,.08)
    }
    .mini b{display:block;font-size:18px;margin-bottom:8px}
    .mini small{color:var(--muted);line-height:1.55}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:10px 0 14px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px);line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.7}
    .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:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li,.text-muted{color:var(--muted);line-height:1.7}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(47,107,255,.14), rgba(17,184,200,.12));color:#1c4ed8;font-weight:800;margin-bottom:14px
    }
    .section-box{padding:24px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
    .list{margin:0;padding-left:18px}
    .list li{margin:8px 0}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #e7eef8;text-align:left;vertical-align:top}
    th{background:#f3f7ff;color:#17336b;font-size:14px}
    td{color:var(--text)}
    .rating{display:inline-flex;gap:4px;align-items:center;color:#e09a14;font-weight:800}
    .timeline{display:grid;gap:14px}
    .step{
      display:grid;grid-template-columns:70px 1fr;gap:14px;align-items:start;padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .step-num{
      width:54px;height:54px;border-radius:18px;background:linear-gradient(135deg,#2f6bff,#11b8c8);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px
    }
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;background:#fff;border:none;padding:18px 20px;
      font-size:16px;font-weight:700;color:var(--text);cursor:pointer;text-align:left
    }
    .faq-a{display:none;padding:0 20px 18px;color:var(--muted);line-height:1.75}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .faq-q{background:linear-gradient(180deg,#f9fbff,#ffffff)}
    .reviews,.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{font-size:15px;line-height:1.8;color:var(--text)}
    .author{margin-top:16px;color:#36507a;font-weight:700}
    .meta{margin-top:4px;color:var(--muted);font-size:13px}
    .article-item{padding:18px;display:grid;gap:10px}
    .article-item a{color:#153f93;font-weight:700}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{
      padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#27436d;font-size:13px
    }
    .contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:start}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:700;color:#29416b}
    input,select,textarea{
      width:100%;border:1px solid #cfdced;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);
      outline:none;transition:.2s ease
    }
    textarea{min-height:130px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#73a2ff;box-shadow:0 0 0 4px rgba(47,107,255,.12)}
    .full{grid-column:1 / -1}
    .contact-box{
      display:grid;gap:14px;padding:20px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f7fbff);border:1px solid var(--line)
    }
    .qrcode{display:grid;grid-template-columns:130px 1fr;gap:16px;align-items:center}
    .qrcode img{width:130px;height:130px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .site-footer{
      margin-top:18px;padding:28px 0 22px;border-top:1px solid rgba(219,229,244,.9);
      background:linear-gradient(180deg, rgba(242,246,255,.95), rgba(235,242,252,.98));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px}
    .footer-grid a{color:#2046a8}
    .footer-bottom{margin-top:18px;padding-top:14px;border-top:1px solid rgba(219,229,244,.9);color:#597091;font-size:13px;line-height:1.7}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:9;display:grid;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,#2f6bff,#11b8c8);color:#fff;box-shadow:0 14px 30px rgba(24,72,177,.25);cursor:pointer
    }
    .float-tools button{background:#fff;color:#1f3e76;border:1px solid var(--line)}
    .scroll-reveal{opacity:0;transform:translateY(12px);transition:.6s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .mobile-only{display:none}
    .article-strip{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .media-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
    .media-grid img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow2)}
    @media (max-width: 1024px){
      .hero-grid,.contact-grid,.footer-grid,.split,.grid-4,.reviews,.articles{grid-template-columns:1fr 1fr}
      .grid-3{grid-template-columns:1fr 1fr}
      .media-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .topbar .container,.nav-wrap{flex-wrap:wrap}
      .nav-toggle{display:inline-flex}
      nav{
        display:none;width:100%;padding:10px 0 4px;justify-content:flex-start
      }
      nav.open{display:flex;flex-direction:column;align-items:stretch}
      nav a{width:100%;background:#fff;border:1px solid var(--line)}
      .nav-cta{width:100%;justify-content:flex-start;flex-wrap:wrap}
      .hero{padding-top:16px}
      .hero-panel{padding:24px}
      .hero-grid,.contact-grid,.footer-grid,.split,.grid-3,.grid-4,.reviews,.articles,.mini-grid,.article-strip,.media-grid,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .qrcode{grid-template-columns:1fr}
      .mobile-only{display:block}
      table{min-width:760px}
    }