:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f3f7ff;
      --text:#172033;
      --muted:#5c687d;
      --line:#dce6f5;
      --brand:#2563eb;
      --brand-2:#7c3aed;
      --accent:#06b6d4;
      --warm:#ffb84d;
      --ok:#16a34a;
      --shadow:0 14px 40px rgba(31, 59, 114, .10);
      --shadow-soft:0 10px 24px rgba(31, 59, 114, .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",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 20% 10%, rgba(37,99,235,.10), transparent 26%),
        radial-gradient(circle at 85% 18%, rgba(124,58,237,.10), transparent 24%),
        linear-gradient(180deg,#f8fbff 0%,#f5f8fd 42%,#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}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(220,230,245,.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;box-shadow:0 6px 18px rgba(37,99,235,.14);padding:4px}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover,.nav-links a:focus{color:var(--text);background:#fff;box-shadow:var(--shadow-soft)}
    .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;font-size:14px;transition:.25s;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 24px rgba(37,99,235,.24)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 28px rgba(37,99,235,.30)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#c9d8f3;box-shadow:var(--shadow-soft);transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:44px;height:44px;align-items:center;justify-content:center}
    .menu-toggle span{width:18px;height:2px;background:var(--text);position:relative;display:block;border-radius:2px}
    .menu-toggle span:before,.menu-toggle span:after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
    .menu-toggle span:before{top:-6px}
    .menu-toggle span:after{top:6px}
    .hero{padding:42px 0 26px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side,.card,.section-box,.faq-item,.review-card,.case-card,.article-card,.form-card,.pricing-card,.timeline-card,.compare-card{
      background:var(--panel);border:1px solid rgba(220,230,245,.9);border-radius:var(--radius);box-shadow:var(--shadow-soft)
    }
    .hero-main{
      padding:34px;
      position:relative;overflow:hidden;
      background:
        linear-gradient(135deg, rgba(255,255,255,.94), rgba(243,247,255,.95)),
        radial-gradient(circle at 18% 16%, rgba(37,99,235,.12), transparent 25%),
        radial-gradient(circle at 80% 20%, rgba(124,58,237,.10), transparent 22%);
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef4ff;color:#2454d6;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,54px);line-height:1.08;letter-spacing:-.02em}
    .lead{font-size:17px;line-height:1.9;color:var(--muted);max-width:58ch;margin:0}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}
    .mini-stat{
      padding:14px 14px 16px;border-radius:16px;background:rgba(255,255,255,.85);
      border:1px solid rgba(220,230,245,.9)
    }
    .mini-stat strong{display:block;font-size:24px;color:var(--text)}
    .mini-stat span{display:block;color:var(--muted);font-size:13px;margin-top:4px;line-height:1.5}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-note{margin-top:16px;font-size:13px;color:var(--muted)}
    .hero-side{padding:24px;display:flex;flex-direction:column;gap:16px;background:linear-gradient(180deg,#ffffff 0%,#f4f8ff 100%)}
    .side-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .badge{display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;background:#effdf7;color:#0f7a3e;font-size:12px;font-weight:700}
    .side-list{display:grid;gap:12px}
    .side-item{padding:14px 14px 14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .side-item strong{display:block;font-size:15px;margin-bottom:6px}
    .side-item p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    .section{padding:18px 0 6px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:10px 0 16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.8}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{padding:20px}
    .card h3{margin:10px 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .icon{
      width:46px;height:46px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,rgba(37,99,235,.12),rgba(124,58,237,.12));color:#2742a7;font-weight:800
    }
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted);font-size:13px}
    .panel{padding:24px}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #f7faff);border:1px solid var(--line);position:relative}
    .step .num{width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}
    .compare-table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:920px}
    th,td{padding:14px 16px;border-bottom:1px solid #e8eef8;text-align:left;vertical-align:top;font-size:14px;line-height:1.7}
    th{background:#f5f8ff;color:#22314e;font-size:13px}
    .highlight{color:#0f7a3e;font-weight:700}
    .rating{font-size:20px;font-weight:800;color:#d97706}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:#fff;border:none;text-align:left;font:inherit;font-weight:700;color:var(--text);
      display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer
    }
    .faq-q span{color:var(--brand);font-weight:800}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-a p{margin:0;padding:0 0 18px;color:var(--muted);line-height:1.85;font-size:14px}
    .faq-item.open .faq-a{max-height:220px}
    .reviews .review-card{padding:20px}
    .review-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
    .avatar{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(37,99,235,.15),rgba(6,182,212,.16));display:inline-flex;align-items:center;justify-content:center;font-weight:800;color:#2143a8}
    .review-name{font-weight:800}
    .review-role{font-size:12px;color:var(--muted);margin-top:2px}
    .stars{color:#f59e0b;font-size:14px;letter-spacing:1px}
    .review-card p{margin:0;color:var(--muted);line-height:1.85;font-size:14px}
    .case-card img{width:100%;border-radius:16px;aspect-ratio:16/10;object-fit:cover;border:1px solid var(--line)}
    .case-card .body{padding:16px 0 0}
    .case-card h3{margin:0 0 8px;font-size:17px}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;gap:14px;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:16px;align-items:flex-start}
    .article-item .date{flex:none;width:74px;padding:10px 10px;border-radius:14px;background:#eff4ff;color:#2d4ec0;font-weight:800;text-align:center;line-height:1.2}
    .article-item .date small{display:block;font-size:11px;color:#6a7ca3;font-weight:700;margin-top:4px}
    .article-item h3{margin:0 0 6px;font-size:16px}
    .article-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}
    .pricing{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .pricing-card ul{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:12px}
    .pricing-card li{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line);color:var(--text);line-height:1.7}
    .pricing-card li strong{color:#2143a8}
    .timeline{display:grid;gap:12px}
    .timeline-card{padding:18px}
    .timeline-row{display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:start;padding:12px 0;border-bottom:1px dashed #e4ebf7}
    .timeline-row:last-child{border-bottom:none;padding-bottom:0}
    .timeline-row strong{color:#2143a8}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-group{display:flex;flex-direction:column;gap:8px}
    .form-group.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700;color:#24314d}
    input,select,textarea{
      width:100%;border:1px solid #dbe5f2;border-radius:14px;background:#fff;color:var(--text);
      padding:14px 14px;font:inherit;outline:none;transition:.2s
    }
    input:focus,select:focus,textarea:focus{border-color:#7aa6ff;box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    textarea{min-height:120px;resize:vertical}
    .footer{
      margin-top:26px;padding:26px 0 34px;border-top:1px solid rgba(220,230,245,.9);background:rgba(255,255,255,.58)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}
    .footer p,.footer a,.footer li{color:var(--muted);line-height:1.8;font-size:14px}
    .footer h3{margin:0 0 12px;font-size:17px;color:var(--text)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;background:#fff;border:1px solid var(--line);border-radius:999px}
    .copyright{margin-top:18px;padding-top:16px;border-top:1px solid #e7eef8;color:var(--muted);font-size:13px}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:50px;height:50px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 14px 28px rgba(37,99,235,.25)
    }
    .float-btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .service-badges{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .service-badge{padding:14px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .service-badge strong{display:block;margin-bottom:6px}
    .sticky-quick{
      position:fixed;left:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .sticky-quick a{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft);font-size:13px;color:var(--text)}
    .scroll-reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .banner-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .image-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px}
    .image-card .ai-page-image{width:100%;border-radius:14px;aspect-ratio:16/10;object-fit:cover}
    .subtle{color:var(--muted)}
    .mobile-only{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.process,.pricing,.footer-grid,.grid-2,.banner-strip{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:0;right:0;top:100%;padding:14px 16px 18px;background:rgba(246,248,252,.98);
        border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:8px
      }
      .nav.open .nav-links a{width:100%}
    }
    @media (max-width: 720px){
      .container{width:min(var(--container),calc(100% - 24px))}
      .hero{padding-top:22px}
      .hero-main,.hero-side,.panel,.card,.footer{padding:20px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.process,.pricing,.footer-grid,.banner-strip{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav-actions .btn-ghost{display:none}
      .form-grid{grid-template-columns:1fr}
      .float-tools,.sticky-quick{right:12px;left:auto}
      .sticky-quick{display:none}
      .mobile-only{display:inline-flex}
      table{min-width:760px}
    }