:root{
      --bg:#f7f4ef;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#172033;
      --muted:#5d677b;
      --line:#e5e8f0;
      --brand:#ff4d6d;
      --brand2:#7c5cff;
      --brand3:#0ea5e9;
      --accent:#ffb703;
      --shadow:0 18px 50px rgba(20, 30, 60, .08);
      --radius:22px;
      --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;background:linear-gradient(180deg,var(--bg) 0%,#fff 34%,#f8fbff 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(247,244,239,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,232,240,.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;padding:4px;box-shadow:0 8px 24px rgba(0,0,0,.06)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .menu{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .menu a{font-size:14px;color:#253049;padding:8px 10px;border-radius:999px}
    .menu a:hover,.menu a.active{background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.05)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 30px rgba(124,92,255,.22)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hamburger{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:44px;height:44px}
    .hero{padding:34px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-main{position:relative;overflow:hidden;background:linear-gradient(135deg,#0f172a 0%,#1d2a57 45%,#432c86 100%);color:#fff;border-radius:30px;padding:34px;box-shadow:var(--shadow)}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.1);filter:blur(4px)}
    .hero-main:before{width:220px;height:220px;right:-70px;top:-60px}
    .hero-main:after{width:160px;height:160px;left:-50px;bottom:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.1);font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.08}
    .hero p{margin:0;color:rgba(255,255,255,.86);font-size:16px;line-height:1.75;max-width:64ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px}
    .metric{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:16px}
    .metric b{display:block;font-size:22px;margin-bottom:6px}
    .metric span{font-size:13px;color:rgba(255,255,255,.78);line-height:1.5}
    .hero-side{display:grid;gap:14px}
    .side-card{background:linear-gradient(180deg,#fff,#f8f9ff);border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:var(--shadow)}
    .side-card h3{margin:0 0 10px;font-size:18px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#f3f5fb;color:#26324a;font-size:13px;border:1px solid #e6ebf7}
    section{padding:24px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:64ch;line-height:1.7}
    .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{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 12px 30px rgba(18,27,45,.05);transition:.25s ease}
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(18,27,45,.09)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.8}
    .list{margin:0;padding-left:18px}
    .services .card{min-height:100%}
    .pill{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#fff2f4;color:#ba1f42;font-size:12px;font-weight:700;margin-bottom:12px}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{position:relative;padding:22px}
    .step .num{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:12px;background:linear-gradient(135deg,var(--brand3),var(--brand2));color:#fff;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:900px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid #edf1f7;vertical-align:top}
    th{background:#fbfcff;color:#1d2840;font-size:14px}
    td{color:var(--muted)}
    .highlight{color:#111827;font-weight:700}
    .accordion{display:grid;gap:12px}
    .faq-item{border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 18px;background:#fff;border:0;font-size:16px;font-weight:700;color:var(--text);text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-item.open .faq-a{max-height:220px;padding-bottom:18px}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review .name{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .stars{color:#ffb703;letter-spacing:2px}
    .cases,.articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .timeline .card{position:relative}
    .timeline .card:before{content:"";position:absolute;top:22px;left:22px;width:10px;height:10px;border-radius:50%;background:var(--brand)}
    .timeline .card{padding-top:40px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#253049}
    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}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#9bb2ff;box-shadow:0 0 0 4px rgba(124,92,255,.12)}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:10px}
    footer{margin-top:14px;background:#101827;color:#dbe3f4;padding:26px 0 18px}
    footer a{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .footer-grid h3{margin:0 0 12px;font-size:18px;color:#fff}
    .footer-grid p,.footer-grid li{color:#c8d1e3;line-height:1.8}
    .footer-grid ul{margin:0;padding-left:18px}
    .copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:18px;padding-top:14px;font-size:13px;color:#adbbd6}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow)}
    .wechat-panel{position:fixed;right:16px;bottom:76px;width:260px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow);display:none}
    .wechat-panel.open{display:block}
    .wechat-panel img{border-radius:14px}
    .mini{color:var(--muted);font-size:13px;line-height:1.7}
    .scroll-entrance{opacity:0;transform:translateY(16px);transition:.6s ease}
    .scroll-entrance.in{opacity:1;transform:none}
    .mobile-only{display:none}
    .table-note{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.cases,.articles,.timeline,.footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .menu{display:none}
      .menu.open{display:flex;flex-direction:column;align-items:flex-start;width:100%;padding:12px 0}
      .nav{flex-wrap:wrap}
      .hamburger{display:inline-grid;place-items:center}
      .nav-actions{margin-left:auto}
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.cases,.articles,.timeline,.footer-grid,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .hero-metrics{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .mobile-only{display:block}
    }