:root{
      --bg:#f4f8fb;
      --panel:#ffffff;
      --panel2:#eef8fb;
      --text:#16303d;
      --muted:#5a6b75;
      --line:#d7e3ea;
      --primary:#0ea5b7;
      --primary2:#2b7de9;
      --accent:#10b981;
      --shadow:0 16px 40px rgba(18, 62, 79, .10);
      --shadow2:0 10px 24px rgba(14, 165, 183, .14);
      --radius:18px;
      --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",Arial,sans-serif;background:linear-gradient(180deg,#eef8fb 0%,#f7fbfd 28%,#ffffff 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar,.site-header,.site-footer,.section{position:relative}
    .topbar{background:#e7f6f8;color:#22505f;border-bottom:1px solid #d3ebef;font-size:14px}
    .topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;flex-wrap:wrap}
    .brand{display:flex;align-items:center;gap:12px}
    .brand .ai-page-logo{width:42px;height:42px;border-radius:12px;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.08);object-fit:contain;padding:4px}
    .brand strong{font-size:18px;letter-spacing:.5px}
    .navwrap{display:flex;align-items:center;gap:14px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px;font-weight:700}
    .nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .nav a{color:#35505d;font-weight:600;font-size:14px;opacity:.92}
    .nav a:hover{color:var(--primary)}
    .hero{padding:28px 0 18px}
    .hero-card{background:linear-gradient(135deg,#f7feff 0%,#eef9ff 46%,#f7fbff 100%);border:1px solid #d9edf2;border-radius:28px;box-shadow:var(--shadow);overflow:hidden}
    .hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;padding:30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#e7fbff;color:#0b6d7a;border:1px solid #c9eef3;border-radius:999px;padding:7px 14px;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,50px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.9;max-width:62ch}
    .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:.22s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:var(--shadow2)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 12px 22px rgba(13, 82, 111, .12)}
    .hero-aside{background:rgba(255,255,255,.72);border:1px solid #d8ebf0;border-radius:22px;padding:18px;backdrop-filter:blur(8px)}
    .mini-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{background:linear-gradient(180deg,#fff 0%,#f7fcfd 100%);border:1px solid #e0edf1;border-radius:18px;padding:16px}
    .stat b{display:block;font-size:24px;color:#0c7280}
    .stat span{display:block;margin-top:6px;font-size:13px;color:var(--muted);line-height:1.5}
    .section{padding:26px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.8}
    .grid-3,.grid-4,.grid-2{display:grid;gap:16px}
    .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
    .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
    .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 22px rgba(18,62,79,.06);padding:18px;transition:.22s ease}
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.85}
    .chip-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#ecfafc;border:1px solid #d7eef2;color:#17515d;font-size:13px;font-weight:600}
    .flow{counter-reset:step}
    .flow .card{position:relative;overflow:hidden}
    .flow .card:before{counter-increment:step;content:counter(step, decimal-leading-zero);position:absolute;top:14px;right:14px;font-weight:800;color:#c7e8ee;font-size:22px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf2f5;text-align:left;vertical-align:top}
    th{background:#f5fbfc;color:#1f4150}
    tr:last-child td{border-bottom:none}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 16px}
    .faq summary{cursor:pointer;font-weight:700;color:#183441;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{color:var(--muted);padding-top:10px;line-height:1.85}
    .comment .card{background:linear-gradient(180deg,#fff 0%,#f8fdfe 100%)}
    .quote{font-size:15px;line-height:1.9;color:var(--text)}
    .meta{margin-top:12px;color:var(--muted);font-size:13px}
    .articles a{display:flex;justify-content:space-between;gap:10px;padding:14px 0;border-bottom:1px dashed #dfe8ec;color:var(--text)}
    .articles a span{color:var(--muted)}
    .articles a:hover{color:var(--primary)}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:block;font-weight:700;margin-bottom:8px}
    input,select,textarea{width:100%;border:1px solid #cfe0e7;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#76c7d4;box-shadow:0 0 0 4px rgba(14,165,183,.10)}
    .full{grid-column:1/-1}
    .footer{margin-top:10px;background:#0f2730;color:#d8ebef}
    .footer a{color:#b7f0f7}
    .footer .container{padding:28px 0}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .small{font-size:13px;color:#9ec3cb;line-height:1.8}
    .socials{display:flex;flex-wrap:wrap;gap:10px}
    .socials a{padding:8px 12px;border:1px solid rgba(255,255,255,.12);border-radius:999px;background:rgba(255,255,255,.04)}
    .float-tools{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:10px;z-index:50}
    .float-tools a,.float-tools button{width:48px;height:48px;border-radius:14px;border:none;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;display:grid;place-items:center;box-shadow:0 10px 24px rgba(8,97,118,.26);cursor:pointer}
    .top-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:18px;align-items:start}
    .media-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .media-row .card{padding:12px}
    .media-row img{border-radius:14px}
    .tag-row{display:flex;gap:10px;flex-wrap:wrap}
    .tag-row span{padding:8px 11px;border-radius:12px;background:#f1fafc;border:1px solid #d9edf2;font-size:13px;color:#25505d}
    .bigger{font-size:18px;color:#183441;font-weight:700}
    .scorebox{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center}
    .score{width:92px;height:92px;border-radius:50%;background:conic-gradient(var(--primary) 0 99%, #e8eff2 99% 100%);display:grid;place-items:center;color:#0d5c68;font-weight:900;font-size:24px}
    .status{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:#0e7a5c}
    .dot{width:10px;height:10px;border-radius:50%;background:#10b981;box-shadow:0 0 0 6px rgba(16,185,129,.12)}
    .anchor{scroll-margin-top:90px}
    .badge{display:inline-flex;padding:7px 11px;border-radius:999px;background:#ecf7fb;border:1px solid #d9eaf0;color:#245261;font-size:13px;font-weight:700}
    .link-list{display:flex;flex-wrap:wrap;gap:10px}
    .link-list a{padding:10px 12px;border-radius:12px;background:#f4fbfd;border:1px solid #dbecef;color:#1f4f5c}
    .link-list a:hover{border-color:#9bd8e1}
    .service-map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .service-map .card{padding:16px}
    .timeline{display:grid;gap:12px}
    .time-item{display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:start;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:16px}
    .time-item strong{color:#0d7380}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-inner,.top-wrap,.footer-grid,.grid-4,.grid-3,.grid-2,.service-map{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      .menu-btn{display:inline-flex}
      .nav{display:none;width:100%;padding:12px 0 0}
      .nav.open{display:flex}
      .media-row,.form-grid{grid-template-columns:1fr}
      table{min-width:760px}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 24px))}
      .hero{padding-top:16px}
      .hero-card{border-radius:22px}
      .hero-inner{padding:20px}
      h1{font-size:28px}
      .lead{font-size:15px}
      .mini-stats{grid-template-columns:1fr 1fr}
      .scorebox{grid-template-columns:1fr}
      .time-item{grid-template-columns:1fr}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }
    .reveal{opacity:0;transform:translateY(12px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}