:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f2f5ff;
      --text:#172033;
      --muted:#5e6a85;
      --line:#e4e9f6;
      --primary:#6b61ff;
      --primary-2:#19c5ff;
      --accent:#ff5bbd;
      --success:#15b48a;
      --shadow:0 16px 40px rgba(38,55,104,.12);
      --shadow-soft:0 10px 24px rgba(38,55,104,.08);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{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 15% 10%, rgba(107,97,255,.12), transparent 26%),
        radial-gradient(circle at 85% 18%, rgba(25,197,255,.12), transparent 20%),
        linear-gradient(180deg, #f9fbff 0%, #f7f8fc 38%, #f6f8ff 100%);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .skip{position:absolute;left:-9999px;top:auto}
    .skip:focus{left:16px;top:16px;background:#fff;padding:10px 14px;border-radius:10px;z-index:1000;box-shadow:var(--shadow)}
    header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(247,248,252,.82);
      border-bottom:1px solid rgba(228,233,246,.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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:var(--shadow-soft)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .menu-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:12px;padding:10px 12px;font-weight:700
    }
    .nav-links{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{
      color:var(--muted);font-size:14px;padding:8px 10px;border-radius:10px;
      transition:.2s ease;
    }
    .nav-links a:hover,.nav-links a:focus{background:rgba(107,97,255,.08);color:var(--primary)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:14px;padding:12px 16px;
      font-weight:700;cursor:pointer;transition:.2s ease;white-space:nowrap;
    }
    .btn-primary{
      color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));
      box-shadow:0 12px 26px rgba(107,97,255,.22);
    }
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 34px rgba(107,97,255,.28)}
    .btn-ghost{
      color:var(--text);background:#fff;border-color:var(--line)
    }
    .btn-ghost:hover{transform:translateY(-1px);border-color:#cdd6f3;box-shadow:var(--shadow-soft)}
    .hero{
      padding:34px 0 20px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.3fr .9fr;gap:22px;align-items:stretch;
    }
    .hero-card{
      background:
        linear-gradient(135deg, rgba(107,97,255,.12), rgba(25,197,255,.10)),
        linear-gradient(180deg, #ffffff, #f8faff);
      border:1px solid rgba(107,97,255,.12);
      border-radius:28px;
      padding:30px;
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .hero-card::before,.hero-card::after{
      content:"";position:absolute;border-radius:999px;filter:blur(0);
      background:radial-gradient(circle, rgba(255,91,189,.18), transparent 68%);
      pointer-events:none;
    }
    .hero-card::before{width:200px;height:200px;right:-40px;top:-50px}
    .hero-card::after{width:160px;height:160px;left:-40px;bottom:-40px;background:radial-gradient(circle, rgba(25,197,255,.18), transparent 68%)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;background:rgba(107,97,255,.08);color:var(--primary);font-size:13px;font-weight:700
    }
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,54px);line-height:1.05;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .hero-bullets{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .mini-stat{
      background:rgba(255,255,255,.78);border:1px solid rgba(228,233,246,.9);
      border-radius:18px;padding:14px 14px 13px;box-shadow:var(--shadow-soft)
    }
    .mini-stat strong{display:block;font-size:20px}
    .mini-stat span{display:block;margin-top:4px;color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{
      display:grid;gap:14px
    }
    .side-panel{
      background:rgba(255,255,255,.84);border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:var(--shadow-soft)
    }
    .side-panel h2{margin:0 0 10px;font-size:18px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:9px 12px;border-radius:999px;background:linear-gradient(180deg,#fff,#f3f6ff);
      border:1px solid var(--line);font-size:13px;color:var(--text)
    }
    .section{padding:22px 0}
    .section-head{
      display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px
    }
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:60ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .card{
      background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:24px;
      padding:20px;box-shadow:var(--shadow-soft);transition:.2s ease
    }
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .metric .num{font-size:30px;font-weight:800;line-height:1}
    .metric .label{margin-top:8px;font-weight:700}
    .metric .desc{margin-top:6px;color:var(--muted);font-size:14px;line-height:1.6}
    .service h3,.case h3,.review h3,.info-card h3{margin:0 0 8px;font-size:18px}
    .service p,.case p,.review p,.info-card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .pill{font-size:12px;color:#24304d;background:#f4f6ff;border:1px solid #e1e7fb;padding:7px 10px;border-radius:999px}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:stretch
    }
    .steps{display:grid;gap:12px}
    .step{display:flex;gap:14px;align-items:flex-start;padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f6f8ff);border:1px solid var(--line)}
    .step .idx{
      width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--primary-2));
      color:#fff;display:grid;place-items:center;font-weight:800;flex:none
    }
    .step h3{margin:0 0 6px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .table-wrap{overflow:auto;border-radius:24px;border:1px solid var(--line);background:rgba(255,255,255,.92);box-shadow:var(--shadow-soft)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    th{background:#f4f7ff;font-size:14px}
    td{font-size:14px;color:var(--text)}
    .score{
      display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border-radius:999px;background:rgba(21,180,138,.10);color:#0d8e6e;font-weight:700
    }
    .compare-badge{
      display:inline-flex;align-items:center;padding:8px 10px;border-radius:12px;background:rgba(107,97,255,.08);color:var(--primary);font-weight:700;font-size:13px
    }
    .qa{display:grid;gap:12px}
    details{
      background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:18px;padding:0 16px;box-shadow:var(--shadow-soft)
    }
    summary{
      list-style:none;cursor:pointer;padding:16px 0;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:12px
    }
    summary::-webkit-details-marker{display:none}
    summary::after{content:"+";color:var(--primary);font-size:22px;line-height:1}
    details[open] summary::after{content:"–"}
    details p{margin:0 0 16px;color:var(--muted);line-height:1.8}
    .reviews .card{display:flex;flex-direction:column;gap:14px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .avatar{
      width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(107,97,255,.18),rgba(25,197,255,.16));display:grid;place-items:center;font-weight:800;color:var(--primary)
    }
    .quote{font-size:14px;line-height:1.8;color:var(--text)}
    .case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .case .thumb{
      width:100%;border-radius:18px;border:1px solid var(--line);background:#fff;overflow:hidden;margin-bottom:14px
    }
    .case .thumb img{width:100%;height:auto;display:block}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article a{display:block}
    .article .meta{font-size:12px;color:var(--muted);margin-bottom:10px}
    .article h3{margin:0 0 8px;font-size:17px;line-height:1.35}
    .article p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .form-grid{
      display:grid;grid-template-columns:1.1fr .9fr;gap:14px;align-items:start
    }
    form{
      display:grid;grid-template-columns:repeat(2,1fr);gap:12px
    }
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700;color:#2a3550}
    input,select,textarea{
      width:100%;border:1px solid #d9e0f3;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:rgba(107,97,255,.55);box-shadow:0 0 0 4px rgba(107,97,255,.10)}
    textarea{min-height:126px;resize:vertical}
    .contact-box{
      background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:var(--shadow-soft)
    }
    .contact-list{display:grid;gap:12px;margin-top:14px}
    .contact-item{padding:14px 15px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .contact-item strong{display:block;margin-bottom:6px}
    .contact-item span{color:var(--muted);line-height:1.7;font-size:14px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    footer{
      margin-top:22px;border-top:1px solid var(--line);
      background:linear-gradient(180deg,#f7f8fc,#eef2ff);color:#1a2236
    }
    .footer-inner{padding:24px 0}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:14px;align-items:start}
    .footer-note{color:#4f5b78;line-height:1.8;font-size:14px}
    .footer-copy{margin-top:16px;color:#5b6781;font-size:13px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;border:1px solid rgba(107,97,255,.18);
      background:linear-gradient(135deg,#fff,#eef2ff);box-shadow:var(--shadow-soft);
      display:grid;place-items:center;color:var(--primary);font-weight:800
    }
    .float-panel{
      width:280px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);
      padding:16px;display:none
    }
    .float-panel.open{display:block}
    .float-panel img{border-radius:16px;border:1px solid var(--line)}
    .float-panel p{margin:10px 0 0;color:var(--muted);font-size:13px;line-height:1.7}
    .scrolltop{position:fixed;right:16px;bottom:82px;z-index:40;display:none}
    .scrolltop.show{display:grid}
    .fade-up{opacity:0;transform:translateY(18px);transition:.6s ease}
    .fade-up.show{opacity:1;transform:translateY(0)}
    @media (max-width: 1024px){
      .hero-grid,.split,.form-grid,.footer-top,.case-grid,.articles{grid-template-columns:1fr}
      .grid-4{grid-template-columns:repeat(2,1fr)}
      .grid-3{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .menu-toggle{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:72px;
        padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 12px}
      .hero{padding-top:18px}
      .hero-card{padding:22px;border-radius:24px}
      .hero-bullets,.grid-4,.grid-3{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:start}
      .section-head h2{font-size:24px}
      .split,.case-grid,.articles,.form-grid{grid-template-columns:1fr}
      form{grid-template-columns:1fr}
      .floating{right:12px;bottom:12px}
      .float-panel{width:min(280px, calc(100vw - 24px))}
    }