:root{
      --bg:#f4f7fb;
      --bg2:#edf4ff;
      --card:#ffffff;
      --ink:#0f172a;
      --muted:#5b6475;
      --line:#d9e2f2;
      --primary:#1457d6;
      --primary2:#2c8cff;
      --accent:#00b7ff;
      --gold:#ffb300;
      --shadow:0 14px 40px rgba(20, 87, 214, .12);
      --radius:22px;
      --radius-sm:16px;
      --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",Arial,sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 15% 10%, rgba(44,140,255,.14), transparent 22%),
        radial-gradient(circle at 85% 0%, rgba(0,183,255,.10), transparent 24%),
        linear-gradient(180deg, #f7faff 0%, #f3f7fe 46%, #eef4fb 100%);
      line-height:1.65;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 18px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(12px);
      background:rgba(247,250,255,.86);
      border-bottom:1px solid rgba(217,226,242,.9);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 24px rgba(20,87,214,.10)}
    .brand-txt{display:flex;flex-direction:column;min-width:0}
    .brand-txt strong{font-size:18px;line-height:1.1}
    .brand-txt span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2a3551;padding:10px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:4px;width:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:.25s ease;
    }
    .nav-links a:hover::after,.nav-links a:focus::after{width:100%}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;
      padding:10px 12px;font-size:14px;cursor:pointer;box-shadow:0 8px 22px rgba(15,23,42,.06)
    }
    .hero{
      padding:34px 0 22px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch;
    }
    .hero-main{
      background:
        linear-gradient(135deg, rgba(20,87,214,.96), rgba(36,129,255,.94) 55%, rgba(8,61,172,.96));
      color:#fff;border-radius:30px;padding:30px;box-shadow:0 22px 50px rgba(20,87,214,.22);position:relative;overflow:hidden;
    }
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:50%;pointer-events:none;
      background:rgba(255,255,255,.10);filter:blur(2px);
    }
    .hero-main::before{width:220px;height:220px;right:-70px;top:-70px}
    .hero-main::after{width:160px;height:160px;left:-50px;bottom:-50px}
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.12);font-size:13px}
    h1{margin:14px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero-main p{margin:0;color:rgba(255,255,255,.92);font-size:16px;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;
      border-radius:14px;padding:13px 18px;font-weight:700;font-size:15px;border:1px solid transparent;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      cursor:pointer;line-height:1.1;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:#fff;color:var(--primary);box-shadow:0 12px 24px rgba(0,0,0,.12)}
    .btn-ghost{border-color:rgba(255,255,255,.26);color:#fff;background:rgba(255,255,255,.08)}
    .hero-side{
      display:grid;gap:16px;
    }
    .mini-card,.info-card,.service-card,.review-card,.case-card,.faq-item,.content-card,.form-card,.panel{
      background:var(--card);border:1px solid rgba(217,226,242,.95);border-radius:var(--radius);box-shadow:var(--shadow);
    }
    .mini-card{padding:18px}
    .mini-card h3,.section-title h2{margin:0 0 10px;font-size:22px}
    .mini-card p,.section-intro,.muted{color:var(--muted)}
    .stats{
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px;
    }
    .stat{
      background:rgba(255,255,255,.82);border:1px solid rgba(217,226,242,.95);border-radius:20px;padding:18px;
      box-shadow:0 10px 24px rgba(13,41,101,.06)
    }
    .stat strong{display:block;font-size:26px;color:var(--primary)}
    .stat span{font-size:13px;color:var(--muted)}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head .eyebrow{color:var(--primary);font-weight:800;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
    .section-intro{max-width:72ch;margin:0}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{padding:18px;min-height:170px}
    .service-card h3{margin:8px 0 8px;font-size:18px}
    .tag-row{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#eef5ff;color:#1146b0;border:1px solid #d9e5ff;font-size:13px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid var(--line);border-radius:22px;position:relative}
    .step strong{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;margin-bottom:12px}
    .compare{overflow-x:auto}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff;border-radius:18px;overflow:hidden}
    th,td{padding:14px 16px;border-bottom:1px solid #e8eef8;text-align:left;vertical-align:top}
    th{background:#eff5ff;color:#17306b;font-size:14px}
    tr:hover td{background:#fbfdff}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card{padding:18px}
    .review-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}
    .stars{color:#ffb300;letter-spacing:2px}
    .case-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .case-card{padding:18px}
    .list{margin:0;padding-left:18px;color:#334}
    .list li{margin:8px 0}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .article{
      padding:16px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbff)
    }
    .article a{color:#17306b;font-weight:700}
    .article p{margin:8px 0 0;color:var(--muted)}
    .form-wrap{display:grid;grid-template-columns:1fr .8fr;gap:16px;align-items:start}
    .form-card{padding:18px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#24314f}
    input,select,textarea{
      width:100%;border:1px solid #d8e1f1;border-radius:14px;background:#fff;padding:12px 14px;font:inherit;color:var(--ink);
      outline:none;transition:border-color .2s ease, box-shadow .2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(20,87,214,.55);box-shadow:0 0 0 4px rgba(20,87,214,.08)}
    textarea{min-height:124px;resize:vertical}
    .full{grid-column:1 / -1}
    .footer{
      margin-top:10px;padding:20px 0 26px;border-top:1px solid rgba(217,226,242,.9);background:#f4f7fb;color:#23314d
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px;align-items:start}
    .footer a{color:#17306b}
    .footer small{color:#5f6a7f}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 28px rgba(20,87,214,.28)
    }
    .float-panel{
      position:fixed;right:16px;bottom:76px;z-index:61;width:min(320px, calc(100vw - 32px));
      display:none;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 22px 44px rgba(15,23,42,.16);overflow:hidden
    }
    .float-panel.open{display:block}
    .float-panel .panel-head{padding:14px 16px;background:linear-gradient(135deg,#1457d6,#2c8cff);color:#fff}
    .float-panel .panel-body{padding:14px 16px}
    .float-panel .ai-page-image{border-radius:14px;margin-bottom:12px}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;background:#fff;border:0;padding:16px 18px;font:inherit;font-weight:700;color:#15213a;text-align:left;display:flex;justify-content:space-between;gap:12px;cursor:pointer}
    .faq-a{padding:0 18px 16px;color:var(--muted);display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q{border-bottom:1px solid #edf2fb}
    .bounce{animation:floaty 4s ease-in-out infinite}
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease, transform .55s ease}
    .reveal.visible{opacity:1;transform:translateY(0)}
    @keyframes floaty{50%{transform:translateY(-4px)}}
    @media (max-width: 980px){
      .hero-grid,.case-grid,.form-wrap,.footer-grid,.grid-4,.grid-3,.timeline,.quote-grid{grid-template-columns:1fr}
      .stats{grid-template-columns:repeat(2,1fr)}
      .nav-links{display:none;position:absolute;left:18px;right:18px;top:74px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 18px 38px rgba(15,23,42,.12)}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start;gap:2px}
      .menu-btn{display:inline-flex}
      .section-head{align-items:flex-start;flex-direction:column}
      .article-list{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 560px){
      .hero-main{padding:22px;border-radius:24px}
      .stats{grid-template-columns:1fr}
      .btn{width:100%}
      .hero-actions{flex-direction:column}
    }