:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f2f6ff;
      --text:#172033;
      --muted:#5f6b85;
      --line:#dbe4f3;
      --brand:#0b7cff;
      --brand-2:#ff5b7a;
      --brand-3:#ffbf3f;
      --ok:#11b57a;
      --shadow:0 16px 40px rgba(25,48,89,.10);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(11,124,255,.10), transparent 30%),
      radial-gradient(circle at top right, rgba(255,91,122,.10), transparent 28%),
      linear-gradient(180deg,#f8fbff 0%, #f4f7fc 100%);
      color:var(--text);}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(246,248,252,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,228,243,.8)}
    .header-inner{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;border-radius:12px;object-fit:contain;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 8px 24px rgba(18,42,82,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted);margin-top:3px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;width:42px;height:42px;align-items:center;justify-content:center;gap:4px;flex-direction:column;box-shadow:0 8px 18px rgba(31,58,105,.06)}
    .nav-toggle i{display:block;width:18px;height:2px;background:var(--text);border-radius:2px}
    .nav-wrap{display:flex;align-items:center;gap:18px}
    .nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
    .nav a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:10px;transition:.25s}
    .nav a:hover,.nav a.active{color:var(--text);background:#eef4ff}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#3d8dff);color:#fff;box-shadow:0 12px 26px rgba(11,124,255,.24)}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn-accent{background:linear-gradient(135deg,var(--brand-2),#ff8c5a);color:#fff}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(25,48,89,.12)}
    .hero{padding:34px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.section-box,.quote,.faq-item,.form-box,.table-box{background:var(--panel);border:1px solid rgba(219,228,243,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:32px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:999px;filter:blur(4px);opacity:.7}
    .hero-main:before{width:240px;height:240px;background:rgba(11,124,255,.10);right:-80px;top:-70px}
    .hero-main:after{width:180px;height:180px;background:rgba(255,91,122,.09);left:-70px;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,rgba(11,124,255,.10),rgba(255,91,122,.10));color:#0e4ea6;border:1px solid rgba(11,124,255,.12);padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{font-size:clamp(30px,5vw,50px);line-height:1.08;margin:18px 0 14px;letter-spacing:-.02em}
    .hero p{color:var(--muted);font-size:16px;line-height:1.8;margin:0}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .tag{padding:8px 12px;border-radius:999px;background:#f1f6ff;border:1px solid #dce8ff;color:#21406d;font-size:13px;font-weight:600}
    .hero-side{padding:22px;display:grid;gap:14px;align-content:start}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#ffffff 0%,#f8fbff 100%);border:1px solid var(--line)}
    .metric strong{display:block;font-size:28px;line-height:1;color:#0a4fb5}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.5}
    .mini-note{padding:14px 16px;border-radius:18px;background:linear-gradient(135deg,rgba(17,181,122,.10),rgba(11,124,255,.08));border:1px solid rgba(17,181,122,.15);color:#184b39;font-size:14px;line-height:1.7}
    .section{padding:18px 0 12px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:clamp(22px,3vw,32px);line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.7}
    .section-box{padding:24px}
    .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;transition:.25s}
    .card:hover,.quote:hover,.faq-item:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(25,48,89,.12)}
    .card h3{margin:10px 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .icon{width:46px;height:46px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(11,124,255,.12),rgba(255,91,122,.12));color:#184ea7;font-weight:800}
    .list{margin:0;padding-left:18px}
    .timeline{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:64px 1fr;gap:14px;align-items:start;padding:16px;border-radius:18px;background:#fbfdff;border:1px solid var(--line)}
    .step .num{width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--brand),#5aa0ff);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
    .table-box{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #e8eef7;text-align:left;vertical-align:top}
    th{background:#f7faff;color:#1d2c4d}
    td{color:var(--muted)}
    .rating{font-size:30px;color:#f5a623;letter-spacing:2px}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700;background:#eef5ff;color:#2456a9}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;text-align:left;background:#fff;border:none;padding:18px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--text);font-size:16px;font-weight:700;cursor:pointer}
    .faq-a{display:none;padding:0 18px 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{padding:20px;background:linear-gradient(180deg,#fff 0%,#f9fbff 100%);border:1px solid var(--line)}
    .quote strong{display:block;margin-top:12px}
    .form-box{padding:24px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:block;font-size:13px;font-weight:700;color:#253555;margin-bottom:8px}
    input,select,textarea{width:100%;border:1px solid #d8e3f1;background:#fff;border-radius:14px;padding:12px 14px;color:var(--text);font:inherit;outline:none;transition:.2s}
    textarea{min-height:118px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7aaeff;box-shadow:0 0 0 4px rgba(11,124,255,.10)}
    .full{grid-column:1/-1}
    .footer{margin-top:12px;padding:22px 0 26px;background:#f2f6fc;border-top:1px solid #dbe4f3;color:#31405f}
    .footer a{color:#204e99}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .foot-title{font-weight:800;margin-bottom:12px}
    .links{display:flex;flex-wrap:wrap;gap:10px}
    .links a{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}
    .floating{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .floating a,.floating button{width:48px;height:48px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;background:#fff;box-shadow:0 12px 28px rgba(26,48,90,.18);border:1px solid var(--line);cursor:pointer}
    .floating .kf{background:linear-gradient(135deg,var(--brand-2),#ff8c5a);color:#fff}
    .backtop{opacity:0;pointer-events:none;transform:translateY(10px);transition:.25s}
    .backtop.show{opacity:1;pointer-events:auto;transform:none}
    .media-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .media-row img,.square-row img{width:100%;border-radius:18px;border:1px solid var(--line);background:#fff;object-fit:cover}
    .media-row img{aspect-ratio:16/10}
    .square-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .square-row img{aspect-ratio:1/1}
    .table-card{display:grid;gap:16px}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;justify-content:space-between;gap:14px;padding:14px 16px;border-radius:16px;background:#fbfdff;border:1px solid var(--line)}
    .article-item span{color:var(--muted)}
    .info-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .service-net{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .service-net div{padding:14px;border-radius:16px;background:#f8fbff;border:1px solid var(--line);text-align:center;color:#2a4167}
    .menu-panel{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.quote-grid,.footer-grid,.media-row,.square-row,.info-cols,.service-net{grid-template-columns:1fr 1fr}
      .nav-wrap{position:fixed;left:0;right:0;top:74px;background:rgba(246,248,252,.98);padding:16px 20px;border-bottom:1px solid var(--line);display:none;flex-direction:column;align-items:stretch;gap:14px}
      .nav-wrap.open{display:flex}
      .nav{flex-direction:column;align-items:stretch}
      .nav a{padding:12px 14px;background:#fff;border:1px solid var(--line)}
      .nav-toggle{display:inline-flex}
      .menu-panel{display:block}
    }
    @media (max-width: 720px){
      .hero-main,.hero-side,.section-box,.form-box{padding:20px}
      .hero-grid,.grid-3,.grid-4,.quote-grid,.footer-grid,.media-row,.square-row,.info-cols,.service-net,.form-grid,.metric-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
      .article-item{flex-direction:column}
      .step{grid-template-columns:1fr}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}