:root{
      --bg:#f4f7fb;
      --panel:#ffffff;
      --panel-soft:#f8fbff;
      --text:#1e2a3b;
      --muted:#5c6b80;
      --blue:#0f5bd7;
      --blue2:#1f86ff;
      --line:#dbe5f2;
      --shadow:0 18px 50px rgba(18,45,96,.10);
      --radius:22px;
      --radius-sm:16px;
      --good:#0a7d56;
      --warn:#b86b00;
    }
    *{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",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(31,134,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(15,91,215,.10), transparent 22%),
        linear-gradient(180deg,#f9fbff 0%, #f3f7fd 38%, #eef3fb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(1180px, calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:50;
      background:rgba(255,255,255,.82);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(219,229,242,.9);
    }
    .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}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;border:1px solid var(--line)}
    .brand h1{font-size:18px;line-height:1.1;margin:0}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px}
    .navlinks{display:flex; flex-wrap:wrap; gap:8px; align-items:center; justify-content:flex-end}
    .navlinks a{
      padding:9px 12px; border-radius:999px; color:#27405f; font-size:14px;
      transition:.22s ease; border:1px solid transparent;
    }
    .navlinks a:hover{background:#eef5ff;border-color:#d6e6ff;color:#0f5bd7;transform:translateY(-1px)}
    .nav-cta{display:flex; gap:10px; align-items:center}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 16px; border-radius:14px; border:1px solid transparent;
      font-weight:700; cursor:pointer; transition:.22s ease;
      box-shadow:none;
    }
    .btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue2)); color:#fff; box-shadow:0 14px 28px rgba(15,91,215,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 18px 30px rgba(15,91,215,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{border-color:#b9cbed; transform:translateY(-1px)}
    .menu-btn{display:none}
    .hero{
      padding:38px 0 14px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:22px; align-items:stretch;
    }
    .hero-card{
      background:
        linear-gradient(145deg, rgba(15,91,215,.98), rgba(31,134,255,.92) 58%, rgba(11,60,164,.98));
      color:#fff; border-radius:28px; padding:34px; box-shadow:var(--shadow); position:relative; overflow:hidden;
      min-height:420px;
    }
    .hero-card::before,.hero-card::after{
      content:""; position:absolute; border-radius:50%; pointer-events:none;
      background:rgba(255,255,255,.12); filter:blur(6px);
    }
    .hero-card::before{width:220px;height:220px;right:-60px;top:-60px}
    .hero-card::after{width:160px;height:160px;left:-40px;bottom:-30px}
    .hero-kicker{display:inline-flex; gap:8px; align-items:center; padding:8px 12px; border-radius:999px; background:rgba(255,255,255,.14); font-size:13px}
    .hero h2{font-size:44px;line-height:1.08;margin:18px 0 14px;letter-spacing:.2px}
    .hero p{margin:0;color:rgba(255,255,255,.88);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-actions .btn{padding:13px 18px}
    .hero-meta{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; margin-top:28px}
    .meta-box{
      background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.18); border-radius:18px; padding:14px 16px;
      backdrop-filter: blur(12px);
    }
    .meta-box strong{display:block;font-size:20px;margin-bottom:5px}
    .meta-box span{font-size:13px;color:rgba(255,255,255,.85);line-height:1.5}
    .hero-side{
      display:grid; gap:18px;
    }
    .side-card,.panel,.card,.quote,.faq-item,.form-card,.article-card,.review-card,.compare-card{
      background:var(--panel); border:1px solid rgba(219,229,242,.9); border-radius:var(--radius); box-shadow:var(--shadow);
    }
    .side-card{padding:22px}
    .side-title{display:flex; justify-content:space-between; align-items:flex-start; gap:12px; margin-bottom:14px}
    .side-title h3,.section-title h2{margin:0;font-size:24px}
    .side-title p,.section-title p{margin:8px 0 0;color:var(--muted);line-height:1.7}
    .status-list{display:grid; gap:10px; margin:0; padding:0; list-style:none}
    .status-list li{display:flex; gap:10px; align-items:flex-start; color:var(--text); font-size:14px; line-height:1.6}
    .dot{width:10px;height:10px;border-radius:50%; background:linear-gradient(135deg,var(--blue),var(--blue2)); margin-top:6px; flex:0 0 auto}
    .quick-links{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px}
    .tag{
      display:inline-flex; align-items:center; gap:6px; padding:9px 12px; border-radius:999px;
      background:#f2f7ff; color:#234067; border:1px solid #dbe8ff; font-size:13px;
    }
    .section{padding:22px 0}
    .section-title{margin-bottom:18px}
    .grid-4{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px}
    .card{padding:22px; transition:.22s ease}
    .card:hover,.review-card:hover,.article-card:hover,.quote:hover,.compare-card:hover,.form-card:hover{transform:translateY(-3px)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .metric{
      font-size:30px; font-weight:800; color:var(--blue); line-height:1;
      margin-bottom:10px;
    }
    .small{font-size:13px;color:var(--muted)}
    .panel{padding:24px}
    .service-list,.step-list,.timeline,.bullet-list{display:grid;gap:14px;list-style:none;margin:0;padding:0}
    .service-item,.step-item,.timeline-item{
      display:flex; gap:14px; align-items:flex-start; padding:16px; border-radius:18px; background:#f9fbff; border:1px solid #e1ebf8;
    }
    .icon{
      width:42px;height:42px;border-radius:14px; flex:0 0 auto; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(15,91,215,.12), rgba(31,134,255,.18)); color:var(--blue); font-weight:800;
    }
    .service-item h3,.step-item h3,.timeline-item h3{margin:0 0 6px;font-size:17px}
    .service-item p,.step-item p,.timeline-item p{margin:0;color:var(--muted);line-height:1.72;font-size:14px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:860px; background:#fff}
    th,td{padding:14px 16px; border-bottom:1px solid #e8eef7; text-align:left; vertical-align:top; font-size:14px; line-height:1.6}
    th{background:#f3f8ff; color:#19304d}
    tr:hover td{background:#fbfdff}
    .badge{
      display:inline-flex; padding:6px 10px; border-radius:999px; background:#e9f2ff; color:#1052c7; font-size:12px; font-weight:700;
    }
    .compare-card .score{
      display:flex; align-items:baseline; gap:8px; margin:10px 0 14px;
    }
    .score strong{font-size:38px; color:var(--blue)}
    .score span{color:var(--muted)}
    .quotes, .reviews{display:grid; gap:16px}
    .quote,.review-card{padding:20px}
    .quote-top{display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:12px}
    .quote .name{font-weight:800}
    .stars{color:#f59f00; letter-spacing:2px}
    .article-list{display:grid; gap:14px}
    .article-card{padding:18px 20px; display:flex; align-items:flex-start; justify-content:space-between; gap:14px}
    .article-card h3{margin:0 0 6px;font-size:17px}
    .article-card p{margin:0;color:var(--muted);line-height:1.7}
    .article-card a{color:var(--blue);font-weight:700;white-space:nowrap}
    .faq{display:grid; gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; background:none; border:0; padding:18px 20px; text-align:left; font-size:16px; font-weight:700; color:var(--text);
      display:flex; justify-content:space-between; align-items:center; gap:14px; cursor:pointer;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .3s ease; padding:0 20px}
    .faq-item.active .faq-a{max-height:220px; padding-bottom:18px}
    .faq-a p{margin:0; color:var(--muted); line-height:1.75}
    .form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    .form-field{display:flex; flex-direction:column; gap:8px}
    label{font-size:14px; color:#334b69; font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid #d8e3f1; border-radius:14px; background:#fff; color:var(--text);
      padding:13px 14px; font:inherit; outline:none; transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#7fb1ff; box-shadow:0 0 0 4px rgba(31,134,255,.10)}
    textarea{min-height:120px; resize:vertical}
    .full{grid-column:1/-1}
    .footer{
      margin-top:18px;
      background:linear-gradient(180deg,#0d1730 0%, #101f3f 100%);
      color:#d9e6fb;
      padding:28px 0 20px;
    }
    .footer a{color:#ffffff}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .8fr; gap:18px}
    .footer .mini{color:#c8d6ef; line-height:1.75; font-size:14px}
    .footer .link-list{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px}
    .footer .link-list a{display:inline-flex; padding:8px 0; color:#eaf2ff}
    .footer-bottom{
      margin-top:18px; padding-top:16px; border-top:1px solid rgba(255,255,255,.12);
      display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap; color:#bdd0f0; font-size:13px;
    }
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px; display:grid; place-items:center; background:#fff; border:1px solid var(--line); box-shadow:var(--shadow);
      color:var(--blue); font-weight:900;
    }
    .客服{
      position:fixed; left:18px; bottom:18px; z-index:60;
      width:min(280px, calc(100vw - 36px));
      background:#fff; border:1px solid var(--line); border-radius:22px; box-shadow:var(--shadow); overflow:hidden;
    }
    .客服 .head{padding:14px 16px; background:linear-gradient(135deg,#eef5ff,#ffffff); display:flex; justify-content:space-between; gap:10px; align-items:center}
    .客服 .body{padding:14px 16px}
    .客服 .body img{width:100%; border-radius:14px; border:1px solid #dfe9f6; background:#fafcff}
    .客服 .body p{margin:10px 0 0; color:var(--muted); font-size:13px; line-height:1.7}
    .section-anchor{scroll-margin-top:90px}
    .article-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .article-cloud .tag{background:#fff}
    .two-col{display:grid; grid-template-columns:1fr 1fr; gap:16px; align-items:start}
    .image-strip{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px}
    .image-strip img{border-radius:18px; border:1px solid var(--line); background:#fff}
    .thin{font-weight:600}
    @media (max-width: 1024px){
      .hero-grid,.footer-grid,.two-col,.grid-4,.grid-3{grid-template-columns:1fr 1fr}
      .hero h2{font-size:36px}
    }
    @media (max-width: 820px){
      .nav{align-items:flex-start}
      .navlinks,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-panel{
        display:none; padding:0 0 14px;
      }
      .mobile-panel.open{display:block}
      .mobile-panel .navlinks{display:flex; justify-content:flex-start}
      .hero-grid,.grid-4,.grid-3,.grid-2,.footer-grid,.two-col,.form-grid{grid-template-columns:1fr}
      .hero-card{padding:24px; min-height:auto}
      .hero h2{font-size:30px}
      .hero-meta{grid-template-columns:1fr}
      .floating{right:12px; bottom:12px}
      .客服{left:12px; bottom:12px}
      .article-card{flex-direction:column}
      .article-card a{white-space:normal}
    }
    @media (max-width: 520px){
      .container{width:min(1180px, calc(100% - 22px))}
      .hero{padding-top:18px}
      .section{padding:16px 0}
      .panel,.card,.side-card{padding:18px}
      .faq-q{font-size:15px}
      .brand h1{font-size:16px}
    }
    .reveal{opacity:0; transform:translateY(18px); transition:.6s ease}
    .reveal.in{opacity:1; transform:none}