:root{
      --bg:#f5f7fb;
      --bg2:#fff7f2;
      --card:#ffffff;
      --text:#16202f;
      --muted:#5f6b7a;
      --line:#e6eaf1;
      --brand:#ff4d6d;
      --brand2:#2f6bff;
      --brand3:#15b79e;
      --shadow:0 18px 40px rgba(16,24,40,.08);
      --radius:20px;
      --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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,109,.08), transparent 26%),
        radial-gradient(circle at top right, rgba(47,107,255,.10), transparent 24%),
        linear-gradient(180deg, #f7f9fd 0%, #fbfcff 48%, #f5f7fb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(245,247,251,.82);
      border-bottom:1px solid rgba(230,234,241,.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}
    .brand .ai-page-logo{width:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:0 8px 18px rgba(16,24,40,.08)}
    .brand h2{margin:0; font-size:16px; line-height:1.1}
    .brand p{margin:4px 0 0; font-size:12px; color:var(--muted)}
    .menu-btn{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:12px; padding:10px 12px; font-size:14px;
    }
    .nav-links{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:var(--muted); padding:8px 10px; border-radius:10px; transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--text); background:#fff; box-shadow:0 8px 18px rgba(16,24,40,.06)}
    .cta-row{display:flex; gap:10px; flex-wrap:wrap}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border-radius:999px; padding:12px 18px; border:1px solid transparent; font-weight:700; font-size:14px;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor:pointer;
    }
    .btn:hover{transform:translateY(-1px); box-shadow:0 12px 20px rgba(16,24,40,.12)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff9a3c); color:#fff}
    .btn-secondary{background:#fff; border-color:var(--line); color:var(--text)}
    main{display:block}
    section{padding:22px 0}
    .hero{
      padding:28px 0 18px;
    }
    .hero-wrap{
      border:1px solid rgba(230,234,241,.9);
      border-radius:28px;
      background:
        linear-gradient(135deg, rgba(255,77,109,.10), rgba(47,107,255,.08) 42%, rgba(255,255,255,.92) 72%),
        linear-gradient(180deg, #fff, #fdfefe);
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:28px; align-items:center;
      padding:38px;
    }
    .kicker{
      display:inline-flex; align-items:center; gap:8px;
      padding:8px 12px; border-radius:999px; background:rgba(47,107,255,.08); color:var(--brand2);
      font-size:13px; font-weight:700;
    }
    h1{margin:16px 0 14px; font-size:clamp(30px,4vw,52px); line-height:1.08; letter-spacing:-.03em}
    .lead{margin:0; color:var(--muted); font-size:16px; line-height:1.85; max-width:56ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-points{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:14px; margin-top:26px}
    .mini-card{
      padding:16px; border-radius:18px; background:rgba(255,255,255,.74); border:1px solid rgba(230,234,241,.95);
    }
    .mini-card strong{display:block; font-size:18px; margin-bottom:6px}
    .mini-card span{display:block; color:var(--muted); font-size:13px; line-height:1.6}
    .hero-side{
      display:grid; gap:14px;
    }
    .stat-stack{
      display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px;
    }
    .stat{
      background:#fff; border:1px solid var(--line); border-radius:20px; padding:18px;
      box-shadow:0 10px 24px rgba(16,24,40,.05);
    }
    .stat .num{font-size:28px; font-weight:800; color:var(--text)}
    .stat .cap{font-size:13px; color:var(--muted); line-height:1.6; margin-top:6px}
    .visual-panel{
      background:linear-gradient(160deg, #fff, #fff4f1);
      border:1px solid rgba(255,77,109,.12);
      border-radius:24px;
      padding:18px;
      position:relative;
      overflow:hidden;
    }
    .visual-panel:before{
      content:""; position:absolute; inset:auto -30px -40px auto; width:180px; height:180px;
      background:radial-gradient(circle, rgba(255,77,109,.22), transparent 68%);
      pointer-events:none;
    }
    .chip-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .chip{
      padding:10px 12px; border-radius:999px; background:#fff; border:1px solid var(--line);
      font-size:13px; color:#243142; box-shadow:0 8px 16px rgba(16,24,40,.04)
    }
    .section-head{display:flex; justify-content:space-between; align-items:end; gap:14px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); line-height:1.75; max-width:62ch}
    .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{
      background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
      padding:20px; box-shadow:0 12px 28px rgba(16,24,40,.05);
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .card:hover{transform:translateY(-3px); box-shadow:0 18px 40px rgba(16,24,40,.09); border-color:#d6dded}
    .card h3{margin:0 0 10px; font-size:18px}
    .card p{margin:0; color:var(--muted); line-height:1.8}
    .service-list{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:14px}
    .service-list .item{padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff,#fbfcff); border:1px solid var(--line)}
    .tag-row{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:10px 12px; border-radius:12px; background:#fff; border:1px solid var(--line); color:#263244; font-size:13px}
    .table-wrap{overflow:auto; border-radius:22px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow)}
    table{width:100%; border-collapse:collapse; min-width:880px}
    th,td{padding:16px 14px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f8faff; font-size:14px}
    td{color:#2d3a4a; font-size:14px; line-height:1.7}
    .highlight{color:var(--brand); font-weight:800}
    .timeline{display:grid; gap:14px}
    .step{
      display:grid; grid-template-columns:auto 1fr; gap:14px; padding:18px; border-radius:18px;
      background:#fff; border:1px solid var(--line);
    }
    .step .index{
      width:40px; height:40px; border-radius:50%; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--brand2),#7b8cff); color:#fff; font-weight:800;
      box-shadow:0 10px 20px rgba(47,107,255,.18)
    }
    .reviews{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
    .review .role{color:var(--brand2); font-size:13px; font-weight:700; margin-bottom:8px}
    .stars{color:#f59e0b; letter-spacing:2px; margin-bottom:10px}
    .faq{display:grid; gap:12px}
    details{
      background:#fff; border:1px solid var(--line); border-radius:18px; overflow:hidden;
      box-shadow:0 10px 24px rgba(16,24,40,.04)
    }
    summary{
      cursor:pointer; list-style:none; padding:18px 20px; font-weight:700; display:flex; justify-content:space-between; gap:16px;
    }
    summary::-webkit-details-marker{display:none}
    details[open] summary{border-bottom:1px solid var(--line)}
    details .answer{padding:0 20px 18px; color:var(--muted); line-height:1.8}
    .article-list{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px}
    .article{
      padding:18px 18px 16px; border-radius:18px; background:linear-gradient(180deg,#fff,#fbfcff); border:1px solid var(--line);
    }
    .article .meta{font-size:13px; color:var(--muted); margin-top:8px}
    form{display:grid; gap:14px}
    .form-grid{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px}
    label{display:block; font-size:14px; font-weight:700; margin-bottom:8px}
    input,select,textarea{
      width:100%; border:1px solid #dbe2ee; background:#fff; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(47,107,255,.65); box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .footer-top{
      display:grid; grid-template-columns:1.15fr .85fr; gap:16px; align-items:start;
    }
    footer{
      margin-top:10px;
      background:#101827;
      color:#e8edf6;
      padding:28px 0 24px;
    }
    footer a{color:#ffffff}
    .footer-links{display:flex; flex-wrap:wrap; gap:12px}
    .footer-links a{padding:9px 12px; border-radius:999px; background:rgba(255,255,255,.08)}
    .copyright{margin-top:16px; color:#c8d1df; font-size:13px; line-height:1.7}
    .float-tools{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:48px; height:48px; border-radius:50%; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--brand),#ff9a3c); color:#fff; box-shadow:0 14px 28px rgba(255,77,109,.25);
      border:none; cursor:pointer;
    }
    .float-panel{
      position:fixed; right:16px; bottom:74px; width:min(320px, calc(100vw - 32px));
      background:#fff; border:1px solid var(--line); border-radius:20px; box-shadow:var(--shadow);
      padding:14px; display:none; z-index:59;
    }
    .float-panel.open{display:block}
    .float-panel .qrcode{width:120px; border-radius:14px; overflow:hidden; border:1px solid var(--line)}
    .muted{color:var(--muted)}
    .anchor-space{scroll-margin-top:92px}
    .image-row{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px}
    .image-row img,.wide-media img{border-radius:18px; border:1px solid var(--line); box-shadow:0 10px 22px rgba(16,24,40,.05)}
    .wide-media{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px}
    .compare-badge{display:inline-flex; padding:10px 12px; border-radius:12px; background:rgba(255,77,109,.08); color:#d92d20; font-weight:800}
    .service-network{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:14px}
    .network-item{padding:18px; background:#fff; border:1px solid var(--line); border-radius:18px}
    .progress-line{height:10px; background:#eef2f8; border-radius:999px; overflow:hidden; margin-top:12px}
    .progress-line span{display:block; height:100%; width:92%; background:linear-gradient(90deg,var(--brand2),var(--brand))}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.footer-top,.grid-3,.grid-2,.service-list,.reviews,.article-list,.image-row,.wide-media,.service-network,.form-grid,.stat-stack{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none; width:100%; padding-top:10px}
      .nav-links.open{display:flex; flex-direction:column; align-items:flex-start}
      .nav{flex-wrap:wrap}
      .menu-btn{display:inline-flex}
      .cta-row{width:100%}
      .hero-grid{padding:24px}
      .section-head{flex-direction:column; align-items:flex-start}
      .mobile-only{display:block}
    }