:root{
      --bg:#f6f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#1f2a37;
      --muted:#5b6575;
      --line:#d9e1ef;
      --primary:#4c6fff;
      --primary2:#8b5cf6;
      --accent:#ff8a5b;
      --success:#12b981;
      --shadow:0 18px 50px rgba(30, 41, 59, .08);
      --radius:20px;
      --radius-sm:14px;
      --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(1200px 500px at 10% 0%, rgba(76,111,255,.12), transparent 55%),
        radial-gradient(900px 420px at 90% 8%, rgba(255,138,91,.10), transparent 50%),
        linear-gradient(180deg, #fafdff 0%, var(--bg) 46%, #f7f9ff 100%);
    }
    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;
      backdrop-filter: blur(14px);
      background:rgba(250,252,255,.82);
      border-bottom:1px solid rgba(217,225,239,.75);
    }
    .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 20px rgba(76,111,255,.12)}
    .brand-text{display:flex; flex-direction:column; line-height:1.15; min-width:0}
    .brand-text strong{font-size:15px}
    .brand-text span{font-size:12px; color:var(--muted)}
    .nav-toggle{display:none; border:1px solid var(--line); background:#fff; color:var(--text); border-radius:12px; padding:10px 12px}
    .nav-links{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:#344054; padding:8px 10px; border-radius:10px}
    .nav-links a:hover{background:#eef3ff; color:#20305f}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:14px; border:1px solid transparent;
      font-weight:600; transition:.25s ease; cursor:pointer; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#fff; box-shadow:0 16px 28px rgba(76,111,255,.20)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 20px 32px rgba(76,111,255,.28)}
    .btn-ghost{background:#fff; color:#22304a; border-color:var(--line)}
    .btn-ghost:hover{border-color:#c8d3ea; transform:translateY(-2px)}
    main{padding:18px 0 0}
    section{padding:34px 0}
    .hero{padding:26px 0 18px}
    .hero-grid{display:grid; grid-template-columns:1.25fr .75fr; gap:22px; align-items:stretch}
    .hero-copy,.hero-panel,.card,.section-box,.review,.faq-item,.form-box,.article-item,.case-card,.price-card,.timeline-card,.compare-box{
      background:var(--card); border:1px solid rgba(217,225,239,.85); box-shadow:var(--shadow);
    }
    .hero-copy{border-radius:28px; padding:32px; position:relative; overflow:hidden}
    .hero-copy::before{
      content:""; position:absolute; inset:-40% -10% auto auto; width:320px; height:320px; border-radius:50%;
      background:radial-gradient(circle, rgba(76,111,255,.16), transparent 68%);
      pointer-events:none;
    }
    .kicker{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background:#eef3ff; color:#28408a; font-size:13px; font-weight:600}
    h1{margin:14px 0 12px; font-size:clamp(30px, 5vw, 54px); line-height:1.08; letter-spacing:-.02em}
    .lead{margin:0; color:var(--muted); font-size:16px; line-height:1.8; max-width:62ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-highlights{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px}
    .mini{
      padding:14px 16px; border-radius:18px; background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid #e4eaf6;
    }
    .mini strong{display:block; font-size:18px; margin-bottom:4px}
    .mini span{color:var(--muted); font-size:13px; line-height:1.6}
    .hero-panel{border-radius:28px; padding:22px; display:grid; gap:14px; background:
      linear-gradient(180deg, rgba(255,255,255,.96), rgba(246,248,252,.96)),
      linear-gradient(135deg, rgba(76,111,255,.08), rgba(255,138,91,.08))}
    .panel-stat{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .stat{
      border-radius:18px; padding:16px; background:#fff; border:1px solid #e3eaf7;
    }
    .stat strong{display:block; font-size:22px}
    .stat span{font-size:13px; color:var(--muted)}
    .panel-note{padding:16px; border-radius:18px; background:#f1f5ff; color:#2f3c66; line-height:1.75}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:18px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); line-height:1.7; max-width:64ch}
    .card, .section-box, .review, .faq-item, .form-box, .article-item, .case-card, .price-card, .timeline-card, .compare-box{
      border-radius:22px;
    }
    .feature-card,.service-card,.case-card,.price-card,.timeline-card,.compare-box,.article-item,.review{padding:20px}
    .feature-card h3,.service-card h3,.case-card h3,.price-card h3,.timeline-card h3,.article-item h3,.review h3{margin:10px 0 8px; font-size:18px}
    .feature-card p,.service-card p,.case-card p,.price-card p,.timeline-card p,.article-item p,.review p{margin:0; color:var(--muted); line-height:1.75}
    .icon{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(76,111,255,.13), rgba(139,92,246,.12)); color:#3451b2; font-weight:800;
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#314159; font-size:13px}
    .two-col{display:grid; grid-template-columns:1fr 1fr; gap:18px}
    .list{display:grid; gap:10px; margin:0; padding:0; list-style:none}
    .list li{display:flex; gap:10px; align-items:flex-start; color:var(--text); line-height:1.65}
    .dot{width:8px; height:8px; margin-top:9px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--accent)); flex:0 0 auto}
    .table-wrap{overflow:auto; border-radius:22px; border:1px solid rgba(217,225,239,.85); box-shadow:var(--shadow); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:16px; border-bottom:1px solid #edf1f7; text-align:left; vertical-align:top; line-height:1.7}
    th{background:#f7f9ff; color:#24324a; font-size:14px}
    td{color:#334155; font-size:14px}
    .rating{display:flex; align-items:center; gap:8px; flex-wrap:wrap}
    .stars{color:#f59e0b; letter-spacing:2px}
    .label{display:inline-flex; align-items:center; gap:6px; padding:7px 10px; border-radius:999px; background:#eef7ff; color:#2450c9; font-size:12px; font-weight:700}
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{padding:18px; border-radius:20px; background:linear-gradient(180deg,#fff,#f8fbff); border:1px solid #e3eaf7; position:relative}
    .step .num{font-size:13px; color:#4c6fff; font-weight:800}
    .step h3{margin:8px 0 6px; font-size:17px}
    .step p{margin:0; color:var(--muted); line-height:1.7}
    .timeline{display:grid; gap:12px}
    .timeline-item{display:grid; grid-template-columns:110px 1fr; gap:14px; align-items:start; padding:16px 18px; border-radius:18px; background:#fff; border:1px solid #e3eaf7}
    .timeline-item strong{color:#27406f}
    .timeline-item span{color:var(--muted); line-height:1.7}
    .reviews,.articles,.cases,.prices{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review .meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px}
    .avatar{width:42px; height:42px; border-radius:14px; background:linear-gradient(135deg,#4c6fff,#8b5cf6); color:#fff; display:grid; place-items:center; font-weight:700}
    .faq{display:grid; gap:12px}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{width:100%; border:0; background:transparent; color:var(--text); padding:18px 20px; display:flex; justify-content:space-between; align-items:center; gap:12px; font-size:16px; font-weight:700; cursor:pointer; text-align:left}
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; border-top:1px solid transparent}
    .faq-a p{margin:0; padding:0 20px 18px; color:var(--muted); line-height:1.8}
    .faq-item.open .faq-a{max-height:220px; border-top-color:#edf1f7}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.25s ease}
    .form-box{padding:22px}
    form{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .field{display:grid; gap:8px}
    .field.full{grid-column:1 / -1}
    .field label{font-size:14px; font-weight:700; color:#31415c}
    .field input,.field select,.field textarea{
      width:100%; border:1px solid #d7dfeb; border-radius:14px; padding:13px 14px; font:inherit; color:var(--text); background:#fff;
      outline:none; transition:.2s ease;
    }
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#7b95ff; box-shadow:0 0 0 4px rgba(76,111,255,.10)}
    .field textarea{min-height:120px; resize:vertical}
    .form-actions{grid-column:1/-1; display:flex; gap:12px; flex-wrap:wrap; align-items:center}
    footer{
      margin-top:10px;
      padding:28px 0 24px;
      background:#eef3ff;
      border-top:1px solid #dce4f2;
      color:#24324a;
    }
    footer a{color:#2348b8}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr 1fr; gap:18px; align-items:start}
    .footer-grid h3{margin:0 0 10px}
    .footer-grid p{margin:0; color:#4b5568; line-height:1.8}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:8px 10px; border-radius:10px; background:#fff; border:1px solid #dbe3f0}
    .floating{
      position:fixed; right:18px; bottom:18px; display:grid; gap:10px; z-index:60;
    }
    .floating a,.floating button{
      width:52px; height:52px; border-radius:16px; border:0; display:grid; place-items:center; box-shadow:var(--shadow); cursor:pointer;
      background:#fff; color:#23314b; border:1px solid #dbe3f0;
    }
    .floating .primary{background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#fff}
    .mobile-menu{display:none}
    .home-link{font-weight:700; color:#2348b8}
    .float-qr{display:grid; gap:10px; margin-top:12px}
    .float-qr img{width:168px; border-radius:16px; border:1px solid #dbe3f0; background:#fff; padding:6px}
    .scroll-reveal{opacity:0; transform:translateY(14px); transition:.55s ease}
    .scroll-reveal.visible{opacity:1; transform:none}
    .banner-row{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .banner-row .imgbox{border-radius:20px; overflow:hidden; border:1px solid #dbe3f0; background:#fff; box-shadow:var(--shadow)}
    .banner-row .imgbox img{width:100%; height:auto}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.articles,.cases,.prices,.footer-grid,.two-col,.banner-row{grid-template-columns:1fr 1fr}
      .hero-highlights{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .nav-toggle{display:inline-flex}
      .nav-links{display:none; width:100%; padding:10px 0 4px}
      .nav.open{flex-wrap:wrap}
      .nav.open .nav-links{display:flex; flex-direction:column; align-items:flex-start; gap:8px}
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.articles,.cases,.prices,.footer-grid,.two-col,.banner-row{grid-template-columns:1fr}
      .hero-copy,.hero-panel{padding:22px}
      h1{font-size:clamp(30px, 9vw, 42px)}
      .section-head{flex-direction:column; align-items:flex-start}
      form{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      .floating{right:12px; bottom:12px}
    }