:root{
      --bg:#f6f9fd;
      --panel:#ffffff;
      --panel-2:#f0f6ff;
      --text:#17304a;
      --muted:#5e7287;
      --line:#d9e5f2;
      --brand:#1778ff;
      --brand-2:#23c3ff;
      --brand-3:#f5a524;
      --shadow:0 18px 40px rgba(31, 73, 125, .10);
      --radius:20px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      background:
        radial-gradient(circle at top left, rgba(35,195,255,.13), transparent 24%),
        radial-gradient(circle at top right, rgba(23,120,255,.11), transparent 22%),
        linear-gradient(180deg, #f9fcff 0%, #f4f8fd 100%);
      color:var(--text);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    header{
      position:sticky;top:0;z-index:40;
      backdrop-filter:saturate(160%) blur(12px);
      background:rgba(246,249,253,.88);
      border-bottom:1px solid rgba(217,229,242,.75);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .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;border:1px solid var(--line);padding:4px;box-shadow:0 8px 20px rgba(23,120,255,.08)}
    .brand h2{margin:0;font-size:18px;letter-spacing:.5px}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px}
    nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;align-items:center;justify-content:flex-end}
    nav a{display:inline-flex;align-items:center;gap:6px;padding:10px 12px;border-radius:999px;color:#29465f;font-size:14px}
    nav a:hover{background:#eaf3ff;color:var(--brand)}
    .home-link{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff!important;box-shadow:0 12px 24px rgba(23,120,255,.22)}
    main{padding:18px 0 0}
    section{padding:26px 0}
    .hero{
      padding-top:20px;
    }
    .hero-shell{
      background:
        linear-gradient(135deg, rgba(23,120,255,.08), rgba(35,195,255,.05)),
        linear-gradient(180deg, #ffffff, #f7fbff);
      border:1px solid rgba(217,229,242,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .85fr;gap:24px;align-items:center;padding:34px;
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef6ff;color:#1057bf;font-size:13px;font-weight:700}
    h1{margin:18px 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;border:1px solid transparent;font-weight:700}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#125bd6);color:#fff;box-shadow:0 14px 28px rgba(23,120,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-1px)}
    .hero-metrics{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;
    }
    .metric,.card,.review,.faq-item,.form-card,.quote,.compare-wrap,.article-card,.service-chip,.case-card,.timeline-item,.price-card{
      background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 24px rgba(22,54,88,.06)
    }
    .metric{padding:18px}
    .metric strong{display:block;font-size:26px;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:13px;line-height:1.6}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.75}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:20px}
    .card h3{margin:10px 0 8px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:10px 12px;border-radius:999px;background:#eef6ff;color:#1c5db1;border:1px solid #d7e7fb;font-size:13px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
    .service-chip{padding:18px;display:flex;gap:14px}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(23,120,255,.12),rgba(35,195,255,.18));
      color:#0f62d0;font-weight:800;flex:0 0 auto
    }
    .service-chip h3{margin:0 0 6px;font-size:17px}
    .service-chip p{margin:0;color:var(--muted);line-height:1.7}
    .workflow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
    .step{padding:18px;position:relative}
    .step .num{font-size:12px;font-weight:800;color:#0f62d0;background:#eef6ff;padding:6px 10px;border-radius:999px;display:inline-block}
    .step h3{margin:14px 0 8px;font-size:16px}
    .compare-wrap{padding:18px;overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f4f9ff;color:#183b59}
    td{color:var(--muted)}
    .score{font-weight:800;color:#0f62d0}
    .list-check{list-style:none;padding:0;margin:0;display:grid;gap:10px}
    .list-check li{padding-left:26px;position:relative;color:var(--muted);line-height:1.7}
    .list-check li:before{content:"";position:absolute;left:0;top:8px;width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2))}
    .case-card{padding:18px}
    .case-card h3{margin:0 0 8px}
    .case-card .meta{color:#0f62d0;font-size:13px;font-weight:700}
    .review{padding:18px}
    .review .who{font-weight:800;margin-bottom:6px}
    .review .role{font-size:13px;color:#0f62d0;margin-bottom:10px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;background:transparent;border:0;padding:18px 18px;display:flex;align-items:center;justify-content:space-between;gap:14px;
      color:var(--text);font-size:16px;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-a{padding:0 18px 18px;color:var(--muted);line-height:1.75;display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q{border-bottom:1px solid var(--line)}
    .faq-plus{width:30px;height:30px;border-radius:10px;background:#eef6ff;display:grid;place-items:center;color:#0f62d0;flex:0 0 auto}
    .article-list{display:grid;gap:14px}
    .article-card{padding:18px;display:flex;gap:14px;align-items:flex-start}
    .article-card .dot{width:12px;height:12px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--brand),var(--brand-3))}
    .article-card h3{margin:0 0 6px;font-size:16px}
    .article-card p{margin:0;color:var(--muted);line-height:1.7}
    .form-card{padding:20px}
    form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .full{grid-column:1/-1}
    label{display:block;font-size:13px;font-weight:700;margin:0 0 8px;color:#28465f}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);
      outline:none;transition:.2s border-color,.2s box-shadow
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7db3ff;box-shadow:0 0 0 4px rgba(23,120,255,.10)}
    .submit{justify-self:start}
    .footer{
      padding:26px 0 30px;border-top:1px solid var(--line);margin-top:8px;background:rgba(255,255,255,.74)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .footer a{color:#0f62d0}
    .muted{color:var(--muted)}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:50;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;border:1px solid rgba(217,229,242,.95);background:#fff;display:grid;place-items:center;
      box-shadow:0 14px 30px rgba(16,57,99,.14);color:#0f62d0;font-weight:900
    }
    .kefu-panel{
      position:fixed;right:18px;bottom:82px;z-index:50;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;
      width:260px;box-shadow:0 18px 40px rgba(16,57,99,.16);display:none
    }
    .kefu-panel.open{display:block}
    .kefu-panel img{border-radius:14px;border:1px solid var(--line);margin-bottom:10px}
    .kefu-panel strong{display:block;margin-bottom:6px}
    .kefu-panel p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:16px 18px}
    .timeline-item strong{display:block;margin-bottom:6px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .stats-band{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .stats-band .metric{background:linear-gradient(180deg,#ffffff,#f8fbff)}
    .services-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price-card{padding:18px}
    .price-card .price{font-size:30px;font-weight:900;color:#0f62d0}
    .price-card ul{padding-left:18px;color:var(--muted);line-height:1.8}
    .mobile-only{display:none}
    .scroll-anim{opacity:0;transform:translateY(14px);transition:.7s ease}
    .scroll-anim.in{opacity:1;transform:none}
    @media (max-width: 1080px){
      .hero-grid,.split,.footer-grid{grid-template-columns:1fr}
      .grid-4,.grid-3,.workflow,.services-row,.price-grid,.stats-band{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width: 760px){
      .container{width:min(var(--max), calc(100% - 24px))}
      nav{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .hero-grid{padding:22px}
      .hero-metrics,.grid-4,.grid-3,.workflow,.services-row,.price-grid,.stats-band,.split,form{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      h1{font-size:34px}
      section{padding:20px 0}
      .article-card{flex-direction:column}
      .floating{right:12px;bottom:12px}
      .kefu-panel{right:12px;left:12px;width:auto}
    }