:root{--bg:#f4f7fb;--panel:#ffffff;--panel2:#f8fbff;--text:#132238;--muted:#5f6b7a;--line:#dbe4f1;--brand:#2f6bff;--brand2:#8f5cff;--brand3:#1ec9c3;--accent:#e9f0ff;--shadow:0 18px 50px rgba(25,45,85,.10);--radius:20px;--container:1180px}
    *{box-sizing:border-box} html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#eef6ff 0,#f4f7fb 36%,#f7f9fc 100%);color:var(--text);line-height:1.7}
    a{color:var(--brand);text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(100% - 32px,var(--container));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(244,247,251,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,228,241,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
    .brand{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:6px;box-shadow:0 10px 28px rgba(47,107,255,.12)}
    .brand strong{display:block;font-size:16px;letter-spacing:.5px}
    .brand span{display:block;color:var(--muted);font-size:12px}
    .navlinks{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;justify-content:flex-end}
    .navlinks a,.home-pill{padding:9px 12px;border-radius:999px;color:var(--text);font-size:13px;border:1px solid transparent}
    .navlinks a:hover,.home-pill:hover{background:#fff;border-color:var(--line);box-shadow:0 10px 24px rgba(18,34,56,.06)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    header.hero{padding:30px 0 18px;position:relative;overflow:hidden}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:stretch}
    .hero-main,.hero-side,.panel{background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(248,251,255,.96));border:1px solid rgba(219,228,241,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:30px;position:relative;isolation:isolate;overflow:hidden}
    .hero-main::before,.hero-main::after{content:"";position:absolute;border-radius:999px;filter:blur(4px);pointer-events:none}
    .hero-main::before{width:220px;height:220px;background:radial-gradient(circle,rgba(47,107,255,.16),transparent 70%);right:-40px;top:-50px}
    .hero-main::after{width:180px;height:180px;background:radial-gradient(circle,rgba(31,201,195,.16),transparent 70%);left:-40px;bottom:-45px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:linear-gradient(90deg,#eef4ff,#eefcfb);color:#24406f;font-size:13px;font-weight:600;border:1px solid #d8e4ff}
    h1{font-size:clamp(30px,5vw,52px);line-height:1.08;margin:16px 0 14px}
    .lead{margin:0;color:var(--muted);font-size:16px;max-width:56ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:14px;padding:13px 18px;border:1px solid transparent;font-weight:700;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 30px rgba(47,107,255,.24)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(25,45,85,.12)}
    .hero-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
    .metric{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid #e2ebf7}
    .metric b{display:block;font-size:22px;color:#0d1a2b}
    .metric span{display:block;color:var(--muted);font-size:12px}
    .hero-side{padding:18px}
    .side-box{padding:18px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#ffffff);border:1px solid #e2ebf7}
    .side-box + .side-box{margin-top:12px}
    .mini-list{display:grid;gap:10px;margin:12px 0 0;padding:0;list-style:none}
    .mini-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);font-size:14px}
    .dot{width:9px;height:9px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--brand),var(--brand3));box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    main{padding:8px 0 8px}
    section{padding:18px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title h2{margin:0;font-size:26px}
    .section-title p{margin:0;color:var(--muted);max-width:60ch}
    .grid-3,.grid-4{display:grid;gap:14px}
    .grid-3{grid-template-columns:repeat(3,1fr)} .grid-4{grid-template-columns:repeat(4,1fr)}
    .card,.feature,.review,.faq-item,.news-item,.timeline-item,.price-item,.compare-card{background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid #e1e9f5;border-radius:18px;box-shadow:0 10px 24px rgba(25,45,85,.05)}
    .card,.feature,.review,.news-item,.timeline-item,.price-item,.compare-card{padding:18px}
    .feature:hover,.card:hover,.review:hover,.news-item:hover,.timeline-item:hover,.price-item:hover,.compare-card:hover{transform:translateY(-3px);transition:.25s ease;box-shadow:0 18px 34px rgba(25,45,85,.10)}
    .kpi{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .kpi .card b{font-size:24px;display:block}
    .kpi .card small{color:var(--muted)}
    .tagcloud{display:flex;flex-wrap:wrap;gap:10px}
    .tagcloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid #dfe7f2;color:#27415f;font-size:13px}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .step{position:relative}
    .step .num{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:700;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid #e1e9f5;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:14px 12px;border-bottom:1px solid #edf2fa;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f4f8ff;color:#183152}
    .check{color:#0f8f5a;font-weight:700} .star{color:#ffb400;font-weight:700}
    .rating-box{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
    .score{display:flex;align-items:center;gap:16px}
    .score b{font-size:44px;line-height:1;color:#15263f}
    .score .rad{width:92px;height:92px;border-radius:50%;background:conic-gradient(var(--brand) 0 356deg,#e7eef9 356deg 360deg);display:grid;place-items:center}
    .score .rad span{width:72px;height:72px;border-radius:50%;background:#fff;display:grid;place-items:center;font-weight:800;color:#21324f}
    .formgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .formgrid .full{grid-column:1 / -1}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #dbe4f1;background:#fff;color:var(--text);outline:none;font:inherit}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8db0ff;box-shadow:0 0 0 4px rgba(47,107,255,.08)}
    .faq-list{display:grid;gap:12px}
    .faq-item summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 18px 16px;color:var(--muted)}
    .faq-item[open]{border-color:#bcd0f5;box-shadow:0 16px 28px rgba(47,107,255,.08)}
    .reviews,.news-grid,.service-net{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review .role{color:#2f6bff;font-size:12px;font-weight:700;letter-spacing:.2px}
    .review .quote{margin:10px 0 0;color:var(--text)}
    .images{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .ai-page-image{width:100%;border-radius:18px;border:1px solid #e1e9f5;box-shadow:0 14px 28px rgba(25,45,85,.06)}
    .floating{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;min-width:46px;height:46px;padding:0 14px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 16px 32px rgba(47,107,255,.28);font-weight:700}
    .float-box{position:fixed;left:18px;bottom:18px;z-index:60;background:#fff;border:1px solid #dbe4f1;border-radius:18px;box-shadow:0 18px 36px rgba(15,25,40,.14);padding:12px;max-width:210px}
    .float-box img{width:100%;border-radius:12px;margin-top:8px}
    footer{margin-top:10px;background:#0f1b2e;color:#dce7fb;padding:28px 0 18px}
    footer a{color:#a8c4ff} footer .muted{color:#aac0de}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .foot-links{display:flex;flex-wrap:wrap;gap:10px}
    .foot-links a{background:rgba(255,255,255,.06);padding:8px 11px;border-radius:999px}
    .copyright{margin-top:16px;padding-top:14px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#98b1d0}
    .article-list{display:grid;gap:10px}
    .article-list a{display:flex;justify-content:space-between;gap:14px;padding:14px 16px;background:#fff;border:1px solid #e1e9f5;border-radius:16px;color:var(--text)}
    .article-list a:hover{border-color:#bcd0f5;transform:translateY(-2px)}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .timeline-item .t{font-weight:800;color:#173255;margin-bottom:6px}
    .mobile-only{display:none}
    @media (max-width: 1100px){
      .hero-grid,.rating-box,.footer-grid,.grid-4,.kpi,.process,.timeline,.reviews,.news-grid,.service-net{grid-template-columns:repeat(2,1fr)}
      .grid-3{grid-template-columns:repeat(2,1fr)}
      .hero-metrics{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .menu-btn{display:inline-flex}
      .navlinks{display:none;position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid #dbe4f1;border-radius:18px;padding:10px;box-shadow:var(--shadow)}
      .navlinks.open{display:flex;flex-direction:column;align-items:flex-start}
      .hero-grid,.rating-box,.footer-grid,.grid-4,.grid-3,.kpi,.process,.timeline,.reviews,.news-grid,.service-net,.images,.formgrid{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .section-title{align-items:flex-start;flex-direction:column}
      .floating,.float-box{left:14px;right:14px;bottom:14px}
      .float-box{max-width:none}
      .mobile-only{display:block}
      .desktop-home{display:none}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}