:root{
      --bg:#f6f8fc;
      --surface:#ffffff;
      --surface-2:#eef4ff;
      --text:#172033;
      --muted:#5b677f;
      --line:#d9e2f1;
      --primary:#1d6fff;
      --primary-2:#4bb7ff;
      --accent:#ff8b2c;
      --success:#25a45a;
      --shadow:0 18px 50px rgba(25, 45, 92, .10);
      --shadow-soft:0 10px 24px rgba(25, 45, 92, .08);
      --radius:20px;
      --radius-sm:14px;
      --container: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",Arial,sans-serif;
      background:
        radial-gradient(circle at 12% 8%, rgba(29,111,255,.12), transparent 25%),
        radial-gradient(circle at 86% 12%, rgba(75,183,255,.10), transparent 28%),
        linear-gradient(180deg, #fbfcff 0%, #f4f7fc 40%, #f7f9fd 100%);
      color:var(--text);
      line-height:1.65;
    }
    img{display:block; max-width:100%; height:auto}
    a{color:var(--primary); text-decoration:none}
    a:hover{color:#1558d6}
    .container{max-width:var(--container); margin:0 auto; padding:0 20px}
    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(250,252,255,.82);
      border-bottom:1px solid rgba(217,226,241,.8);
    }
    .topbar{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:72px;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .ai-page-logo{width:42px; flex:0 0 auto}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:18px; letter-spacing:.3px}
    .brand-text span{display:block; color:var(--muted); font-size:12px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
    nav{display:flex; align-items:center; gap:18px}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap}
    .nav-links a{color:var(--text); font-size:14px; padding:8px 10px; border-radius:999px}
    .nav-links a:hover{background:#edf4ff; color:#1458d6}
    .nav-actions{display:flex; align-items:center; gap:10px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:999px; border:1px solid transparent;
      font-weight:700; cursor:pointer; transition:.22s ease; box-shadow:none;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#4f8cff); color:#fff; box-shadow:0 12px 26px rgba(29,111,255,.24)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 34px rgba(29,111,255,.28); color:#fff}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn-secondary:hover{background:#f1f6ff; transform:translateY(-2px)}
    .menu-toggle{
      display:none; width:44px; height:44px; border-radius:12px; border:1px solid var(--line);
      background:#fff; align-items:center; justify-content:center; cursor:pointer;
    }
    .menu-toggle span{display:block; width:18px; height:2px; background:#31415f; position:relative}
    .menu-toggle span::before,.menu-toggle span::after{content:""; position:absolute; left:0; width:18px; height:2px; background:#31415f}
    .menu-toggle span::before{top:-6px}.menu-toggle span::after{top:6px}
    main{overflow:hidden}
    .hero{
      padding:44px 0 30px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:28px; align-items:stretch;
    }
    .hero-card{
      position:relative; border-radius:28px; padding:34px; overflow:hidden;
      background:
        linear-gradient(135deg, rgba(29,111,255,.10), rgba(255,255,255,.92)),
        linear-gradient(180deg,#ffffff,#f5f9ff);
      border:1px solid rgba(217,226,241,.85);
      box-shadow:var(--shadow);
    }
    .hero-card::before{
      content:""; position:absolute; inset:auto -10% -12% auto; width:220px; height:220px; border-radius:50%;
      background:radial-gradient(circle, rgba(29,111,255,.18), transparent 70%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:8px 14px; border-radius:999px;
      background:#eef5ff; color:#1857d7; font-size:13px; font-weight:700;
    }
    h1{margin:16px 0 12px; font-size:clamp(30px,4vw,48px); line-height:1.08; letter-spacing:-.02em}
    .lead{margin:0; color:var(--muted); font-size:16px; max-width:62ch}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:24px}
    .hero-points{
      margin-top:24px; display:grid; grid-template-columns:repeat(3,1fr); gap:12px;
    }
    .mini-stat{
      background:rgba(255,255,255,.82); border:1px solid rgba(217,226,241,.8);
      border-radius:18px; padding:16px 14px; box-shadow:var(--shadow-soft);
    }
    .mini-stat strong{display:block; font-size:20px; color:#0f2f73}
    .mini-stat span{display:block; font-size:12px; color:var(--muted)}
    .hero-side{
      display:grid; gap:14px;
    }
    .info-card{
      background:rgba(255,255,255,.94); border:1px solid var(--line); border-radius:24px;
      padding:20px; box-shadow:var(--shadow-soft);
    }
    .info-card h3{margin:0 0 10px; font-size:18px}
    .list{margin:0; padding:0; list-style:none; display:grid; gap:10px}
    .list li{display:flex; gap:10px; color:var(--text)}
    .dot{width:10px; height:10px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--primary-2)); flex:0 0 auto; margin-top:.45em}
    section{padding:18px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:18px; margin-bottom:18px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); max-width:62ch}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .card{
      background:var(--surface); border:1px solid var(--line); border-radius:24px; padding:22px; box-shadow:var(--shadow-soft);
      transition:.24s ease;
    }
    .card:hover{transform:translateY(-4px); box-shadow:var(--shadow)}
    .metric{font-size:30px; font-weight:800; color:#10347c; margin:0 0 6px}
    .muted{color:var(--muted)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:10px 14px; border-radius:999px; background:#eef5ff; color:#184bba; border:1px solid #dce9ff; font-size:13px}
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{position:relative}
    .step-num{width:42px; height:42px; display:inline-flex; align-items:center; justify-content:center; border-radius:14px; background:linear-gradient(135deg,#1d6fff,#4bb7ff); color:#fff; font-weight:800}
    .step h3{margin:14px 0 8px; font-size:18px}
    .table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:22px; background:#fff; box-shadow:var(--shadow-soft)}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:16px 18px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f4f8ff; font-size:14px}
    tr:last-child td{border-bottom:none}
    .badge{display:inline-flex; padding:6px 10px; border-radius:999px; background:#edf6ff; color:#1d61ea; font-size:12px; font-weight:700}
    details{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:0 18px; box-shadow:var(--shadow-soft);
    }
    details + details{margin-top:12px}
    summary{cursor:pointer; list-style:none; padding:18px 0; font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 18px; color:var(--muted)}
    .review{
      display:grid; gap:12px;
    }
    .review .meta{display:flex; align-items:center; justify-content:space-between; gap:10px}
    .stars{color:#ff9f2f; letter-spacing:1px; font-weight:800}
    .case-card{
      display:grid; gap:12px;
    }
    .case-top{display:flex; justify-content:space-between; gap:12px; align-items:flex-start}
    .case-top h3{margin:0}
    .timeline{display:grid; gap:14px}
    .timeline-item{display:grid; grid-template-columns:120px 1fr; gap:16px; align-items:start}
    .timeline-item .year{font-weight:800; color:#143a8b}
    .form{
      display:grid; gap:14px;
    }
    .field-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:grid; gap:8px; font-size:14px; font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px;
      background:#fff; color:var(--text); font:inherit; outline:none;
    }
    input:focus,select:focus,textarea:focus{border-color:#6ea3ff; box-shadow:0 0 0 4px rgba(29,111,255,.10)}
    textarea{min-height:120px; resize:vertical}
    .footer{
      margin-top:22px; padding:28px 0 34px; border-top:1px solid rgba(217,226,241,.9);
      background:linear-gradient(180deg, rgba(248,251,255,.7), rgba(244,247,252,1));
      color:var(--text);
    }
    .footer-grid{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{color:var(--text); background:#fff; border:1px solid var(--line); padding:8px 12px; border-radius:999px}
    .footer-links a:hover{background:#eef5ff}
    .small{font-size:13px; color:var(--muted)}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:60; display:grid; gap:10px;
    }
    .floating a, .floating button{
      width:48px; height:48px; border-radius:16px; display:inline-flex; align-items:center; justify-content:center;
      border:1px solid var(--line); background:#fff; box-shadow:var(--shadow-soft); cursor:pointer; color:var(--text);
    }
    .floating a:hover, .floating button:hover{transform:translateY(-2px)}
    .to-top{display:none}
    .kefu{
      position:fixed; left:18px; bottom:18px; z-index:60; max-width:300px;
    }
    .kefu-card{
      display:none; background:#fff; border:1px solid var(--line); border-radius:18px; padding:14px; box-shadow:var(--shadow);
      margin-top:10px;
    }
    .kefu.open .kefu-card{display:block}
    .kefu-trigger{
      display:inline-flex; align-items:center; gap:8px; padding:12px 16px; border-radius:999px; border:none;
      background:linear-gradient(135deg,#ff8b2c,#ffb35c); color:#fff; font-weight:800; box-shadow:0 14px 28px rgba(255,139,44,.24)
    }
    .images-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .images-grid .card{padding:14px}
    .ai-page-image{border-radius:18px; width:100%; object-fit:cover}
    .toggle-nav{display:none}
    .scroll-animate{opacity:0; transform:translateY(18px); transition:.6s ease}
    .scroll-animate.in{opacity:1; transform:none}
    @media (max-width: 960px){
      .hero-grid,.grid-3,.grid-2,.workflow,.footer-grid,.images-grid,.field-grid{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      nav{display:none}
      .menu-toggle{display:inline-flex}
      nav.open{
        display:block; position:absolute; left:0; right:0; top:72px; background:rgba(250,252,255,.98); border-bottom:1px solid var(--line);
        padding:12px 20px 18px;
      }
      .nav-links{display:grid; gap:8px}
      .nav-actions{margin-top:12px}
      .hero{padding-top:24px}
      .hero-card{padding:24px}
      .hero-points{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
    }