:root{
      --bg:#f7f5ef;
      --bg2:#eef5ff;
      --card:#ffffff;
      --card2:#fff7e8;
      --text:#1d2433;
      --muted:#5d687a;
      --line:#dde4f0;
      --primary:#2d6cff;
      --primary2:#ff6a88;
      --accent:#ffa940;
      --accent2:#20c997;
      --shadow:0 18px 40px rgba(34, 50, 84, .10);
      --radius:22px;
      --radius2:16px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255, 106, 136, .10), transparent 26%),
        radial-gradient(circle at 90% 10%, rgba(45, 108, 255, .10), transparent 22%),
        linear-gradient(180deg, #fffdfa 0%, var(--bg) 44%, #f6f9ff 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(1.2) blur(14px);
      background:rgba(255,255,255,.76);
      border-bottom:1px solid rgba(221,228,240,.8);
    }
    .header-inner{
      display:flex; align-items:center; justify-content:space-between; gap:18px;
      padding:14px 0;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .ai-page-logo{width:44px; height:44px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:0 8px 18px rgba(44, 64, 96, .08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:1.05rem; letter-spacing:.4px}
    .brand-text span{display:block; color:var(--muted); font-size:.84rem}
    .nav-wrap{display:flex; align-items:center; gap:14px}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      padding:10px 12px; border-radius:14px; cursor:pointer; box-shadow:0 8px 20px rgba(34,50,84,.06)
    }
    .nav{
      display:flex; align-items:center; gap:8px; flex-wrap:wrap;
    }
    .nav a{
      font-size:.92rem; color:#334155;
      padding:8px 11px; border-radius:999px;
      transition:.25s ease;
    }
    .nav a:hover,.nav a:focus{background:#edf4ff; color:#1746b8}
    .home-link{
      padding:10px 14px !important;
      background:linear-gradient(135deg, var(--primary), #6b8dff);
      color:#fff !important;
      box-shadow:0 14px 28px rgba(45,108,255,.22);
    }
    .home-link:hover{transform:translateY(-1px)}
    main{display:block}
    section{padding:28px 0}
    .hero{
      padding:30px 0 24px;
      position:relative;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.2fr .8fr; gap:24px; align-items:stretch;
    }
    .hero-copy,.hero-side,.panel,.card,.faq-item,.form-card,.review-card,.case-card,.info-card,.metrics-card,.compare-card,.article-card,.timeline-item,.price-card{
      background:linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.88));
      border:1px solid rgba(221,228,240,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-copy{padding:30px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:7px 12px; border-radius:999px; background:#eff5ff; color:#1e4fbb; font-size:.85rem; font-weight:700;
    }
    h1{
      margin:14px 0 14px;
      font-size:clamp(2rem, 4vw, 3.45rem);
      line-height:1.08;
      letter-spacing:-.03em;
    }
    .lead{font-size:1.05rem; color:var(--muted); max-width:62ch; margin:0 0 18px}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:22px 0 22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:14px; border:1px solid transparent;
      font-weight:700; transition:.25s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg, var(--primary), #4a7dff); color:#fff; box-shadow:0 16px 30px rgba(45,108,255,.22)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn-ghost{background:#fff7ee; color:#8a4b00; border-color:#ffd8a8}
    .btn:hover{transform:translateY(-2px); box-shadow:0 16px 28px rgba(34,50,84,.10)}
    .hero-points{
      display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:12px; margin-top:18px
    }
    .mini{
      padding:14px; border-radius:18px; background:linear-gradient(180deg,#f9fbff,#fff);
      border:1px solid var(--line);
    }
    .mini strong{display:block; font-size:1.05rem}
    .mini span{color:var(--muted); font-size:.88rem}
    .hero-side{padding:20px; display:grid; gap:14px}
    .side-badge{
      padding:12px 14px; border-radius:16px; background:linear-gradient(135deg,#fff0f3,#fff8e8);
      border:1px solid #ffe2e8; color:#7d243d; font-weight:700;
    }
    .side-list{display:grid; gap:10px}
    .side-list div{display:flex; justify-content:space-between; gap:12px; padding:12px 14px; background:#fbfdff; border:1px solid var(--line); border-radius:14px}
    .side-list b{white-space:nowrap}
    .strip{
      display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:14px;
    }
    .metrics-card{padding:18px}
    .metrics-card .num{font-size:1.55rem; font-weight:800}
    .metrics-card p{margin:8px 0 0; color:var(--muted); font-size:.92rem}
    .section-head{
      display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:16px
    }
    .section-head h2{margin:0; font-size:clamp(1.4rem, 2.2vw, 2.1rem)}
    .section-head p{margin:0; color:var(--muted); max-width:68ch}
    .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,.info-card,.case-card,.review-card,.article-card,.price-card,.compare-card,.form-card,.faq-item,.timeline-item{padding:20px}
    .card h3,.info-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3,.compare-card h3{margin:0 0 10px; font-size:1.08rem}
    .muted{color:var(--muted)}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,#eff5ff,#fff3f6); color:#1d4ed8; font-weight:800; margin-bottom:12px;
    }
    .process{
      display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:14px;
    }
    .step{
      position:relative; overflow:hidden;
    }
    .step .index{
      width:34px;height:34px;border-radius:999px;background:linear-gradient(135deg,var(--primary),#7d9bff); color:#fff; display:grid; place-items:center; font-weight:800; margin-bottom:14px;
    }
    .step:after{
      content:""; position:absolute; right:-20px; top:-20px; width:90px; height:90px; border-radius:50%;
      background:radial-gradient(circle, rgba(45,108,255,.12), transparent 68%);
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span,.chip{
      padding:9px 12px; background:#fff; border:1px solid var(--line); border-radius:999px; font-size:.9rem; color:#40506a
    }
    .flow-list{display:grid; gap:12px}
    .flow-item{
      display:flex; gap:12px; align-items:flex-start; padding:14px 16px; border-radius:16px; background:#fff; border:1px solid var(--line)
    }
    .flow-item b{display:block}
    .flow-item small{display:block; color:var(--muted)}
    .table-wrap{overflow-x:auto}
    table{width:100%; border-collapse:separate; border-spacing:0; min-width:760px; background:#fff; border:1px solid var(--line); border-radius:18px; overflow:hidden}
    th,td{padding:14px 14px; border-bottom:1px solid #edf2f7; text-align:left; vertical-align:top}
    th{background:#f7faff; font-size:.94rem}
    tr:last-child td{border-bottom:none}
    .score{color:#d97706; font-weight:800}
    .faq{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; background:transparent; border:0; padding:18px 20px; display:flex; justify-content:space-between; align-items:center; gap:12px;
      color:var(--text); font-size:1rem; cursor:pointer; text-align:left
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 20px}
    .faq-item.active .faq-a{max-height:200px; padding-bottom:18px}
    .faq-item.active .faq-q .plus{transform:rotate(45deg)}
    .plus{transition:.25s ease; font-size:1.2rem; color:#4b5563}
    .review-meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px}
    .stars{color:#ff9f1a; letter-spacing:1px}
    .review-card p{margin:0; color:#465164}
    .case-card .pill{display:inline-block; margin-bottom:12px; padding:6px 10px; background:#eefaf5; color:#157a57; border-radius:999px; font-size:.86rem; font-weight:700}
    .article-list{display:grid; gap:12px}
    .article-row{
      display:flex; justify-content:space-between; gap:14px; padding:14px 16px; border-radius:16px;
      border:1px solid var(--line); background:#fff;
    }
    .article-row span{color:var(--muted)}
    .form-grid{display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:12px}
    .field{display:grid; gap:8px}
    .field.full{grid-column:1/-1}
    input,select,textarea{
      width:100%; border:1px solid #d8e0ee; background:#fff; border-radius:14px; padding:12px 14px;
      font:inherit; color:var(--text); outline:none; transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#8fb0ff; box-shadow:0 0 0 4px rgba(45,108,255,.10)}
    textarea{min-height:124px; resize:vertical}
    .footer{
      margin-top:10px;
      padding:24px 0 30px;
      background:linear-gradient(180deg,#f7f8fc,#eef4ff);
      border-top:1px solid rgba(221,228,240,.9);
      color:#1f2a3d;
    }
    .footer a{color:#1e4fbf}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px}
    .footer h3{margin:0 0 12px; font-size:1.02rem}
    .footer p,.footer li{color:#465164}
    .footer ul{list-style:none; padding:0; margin:0; display:grid; gap:8px}
    .footer-bottom{
      margin-top:18px; padding-top:16px; border-top:1px solid #dce5f2; display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap;
      color:#526074; font-size:.92rem
    }
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .floating a,.floating button{
      width:48px; height:48px; border-radius:16px; border:0; cursor:pointer; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--primary),#6f8cff); color:#fff; box-shadow:0 16px 30px rgba(45,108,255,.22)
    }
    .floating .wechat{background:linear-gradient(135deg,#19c37d,#42d392)}
    .floating .top{background:linear-gradient(135deg,#ff7b95,#ffb55f)}
    .modal{
      position:fixed; inset:0; background:rgba(15,23,42,.45); display:none; align-items:center; justify-content:center; padding:20px; z-index:70;
    }
    .modal.open{display:flex}
    .modal-card{
      width:min(420px, 100%); background:#fff; border-radius:22px; padding:18px; box-shadow:0 28px 80px rgba(0,0,0,.22)
    }
    .modal-card img{border-radius:16px; background:#fff; width:100%; height:auto}
    .modal-card .close{margin-top:12px}
    .scroll-reveal{opacity:0; transform:translateY(18px); transition:.7s ease}
    .scroll-reveal.visible{opacity:1; transform:none}
    .compare-highlight{border:1px solid #ffd59a; background:linear-gradient(180deg,#fffaf0,#ffffff)}
    .service-network{display:flex; flex-wrap:wrap; gap:10px}
    .price-grid{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:14px}
    .price-card .price{font-size:1.8rem; font-weight:900; color:#113b9e}
    .price-card .price small{font-size:.95rem; color:var(--muted); font-weight:600}
    .split{
      display:grid; grid-template-columns:1fr 1fr; gap:16px; align-items:start;
    }
    .image-grid{
      display:grid; grid-template-columns:1fr 1fr; gap:12px;
    }
    .image-grid img,.banner img{width:100%; border-radius:18px; border:1px solid var(--line); background:#fff}
    .banner{display:grid; gap:12px}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.process,.strip,.footer-grid,.split,.price-grid,.grid-2{grid-template-columns:1fr}
      .hero-points,.form-grid{grid-template-columns:1fr 1fr}
      .nav-toggle{display:inline-flex}
      .nav{
        position:absolute; left:16px; right:16px; top:72px;
        display:none; flex-direction:column; align-items:stretch; padding:12px;
        background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:0 24px 50px rgba(34,50,84,.14);
      }
      .nav.open{display:flex}
      .nav a{padding:10px 12px}
      .section-head{flex-direction:column; align-items:flex-start}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .hero-copy,.hero-side,.card,.info-card,.case-card,.review-card,.article-card,.price-card,.compare-card,.form-card,.faq-item,.timeline-item,.metrics-card{padding:16px}
      .hero-points{grid-template-columns:1fr}
      h1{font-size:clamp(1.8rem, 9vw, 2.7rem)}
      .btn{width:100%}
      .hero-actions{flex-direction:column}
      .form-grid{grid-template-columns:1fr}
    }