:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f2f6ff;
      --text:#192233;
      --muted:#5d667a;
      --line:#dfe5f2;
      --primary:#3664ff;
      --primary-2:#15c7b8;
      --accent:#ff8a4c;
      --shadow:0 18px 40px rgba(33, 53, 122, .10);
      --radius:22px;
      --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(circle at top left, rgba(54,100,255,.10), transparent 30%),
        radial-gradient(circle at top right, rgba(21,199,184,.10), transparent 28%),
        linear-gradient(180deg, #fbfcff 0%, #f7f8fc 38%, #f5f8ff 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:saturate(160%) blur(14px);
      background:rgba(247,248,252,.82);
      border-bottom:1px solid rgba(223,229,242,.8);
    }
    .topbar{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:74px;
    }
    .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 18px rgba(54,100,255,.08);
    }
    .brand strong{display:block;font-size:1.05rem;line-height:1.1}
    .brand span{display:block;font-size:.82rem;color:var(--muted);margin-top:2px}
    nav{display:flex;align-items:center;gap:18px}
    .nav-links{
      display:flex;align-items:center;gap:14px;flex-wrap:wrap;
      font-size:.92rem;color:#334;
    }
    .nav-links a{
      padding:9px 10px;border-radius:999px;transition:.22s ease;background:transparent;
    }
    .nav-links a:hover{background:rgba(54,100,255,.08);color:var(--primary)}
    .top-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 16px;font-weight:700;transition:.22s ease;cursor:pointer;
      box-shadow:none;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--primary),#5d7dff);
      color:#fff;box-shadow:0 12px 24px rgba(54,100,255,.22);
    }
    .btn-outline{
      background:#fff;color:var(--text);border-color:var(--line);
    }
    .btn:hover{transform:translateY(-1px)}
    .menu-toggle{display:none}
    .hero{
      padding:42px 0 22px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .9fr;gap:24px;align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.info-card,.review-card,.faq-item,.quote-card,.service-card,.case-card,.article-card,.step-card,.compare-wrap,.form-card,.contact-card,.price-card,.timeline-card{
      background:var(--panel);
      border:1px solid rgba(223,229,242,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{
      padding:34px;
      position:relative;overflow:hidden;
      background:
        linear-gradient(135deg, rgba(54,100,255,.08), rgba(21,199,184,.07) 40%, rgba(255,138,76,.06)),
        #fff;
    }
    .hero-main:before{
      content:"";position:absolute;inset:auto -80px -100px auto;width:260px;height:260px;border-radius:50%;
      background:radial-gradient(circle, rgba(54,100,255,.18), transparent 68%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:rgba(54,100,255,.08);color:var(--primary);font-weight:700;font-size:.88rem;
    }
    h1{
      font-size:clamp(2rem, 4.7vw, 3.8rem);
      line-height:1.08;
      margin:18px 0 14px;
      letter-spacing:-.03em;
    }
    .lead{font-size:1.06rem;line-height:1.85;color:var(--muted);max-width:62ch;margin:0 0 22px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
    .hero-points{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;
    }
    .point{
      padding:14px 14px;border-radius:18px;background:rgba(245,248,255,.9);border:1px solid #e7edfb;
    }
    .point strong{display:block;font-size:.98rem;margin-bottom:4px}
    .point span{display:block;color:var(--muted);font-size:.9rem;line-height:1.65}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .logo-row{display:flex;align-items:center;justify-content:space-between;gap:14px}
    .mini-badge{
      display:inline-flex;align-items:center;gap:8px;padding:8px 10px;border-radius:999px;
      background:#f3f7ff;color:#3552d0;font-size:.84rem;font-weight:700;
    }
    .image-stack{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .image-stack .ai-page-image{width:100%;border-radius:18px;border:1px solid var(--line);aspect-ratio:1.02/1;object-fit:cover;background:#fff}
    .section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
    .section-head h2{font-size:1.5rem;margin:0}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .metric,.service-card,.case-card,.article-card,.review-card,.step-card,.price-card,.timeline-card,.contact-card,.faq-item,.quote-card,.compare-wrap,.form-card{padding:18px}
    .metric strong{display:block;font-size:1.45rem;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:.92rem;line-height:1.6}
    .metric{position:relative;overflow:hidden}
    .metric:after{
      content:"";position:absolute;right:-22px;bottom:-22px;width:90px;height:90px;border-radius:50%;
      background:radial-gradient(circle, rgba(54,100,255,.12), transparent 68%);
    }
    .service-card h3,.case-card h3,.article-card h3,.review-card h3,.step-card h3,.price-card h3,.timeline-card h3,.contact-card h3,.faq-item summary,.compare-wrap h3,.form-card h3,.quote-card h3{
      margin:0 0 10px;font-size:1.08rem;
    }
    .muted{color:var(--muted);line-height:1.78}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:9px 12px;border-radius:999px;background:#f4f7ff;border:1px solid #e4eafb;color:#334;font-size:.9rem
    }
    .timeline{
      display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
    }
    .timeline-card .num{
      display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;
      background:linear-gradient(135deg, rgba(54,100,255,.16), rgba(21,199,184,.16));color:#244; font-weight:800;margin-bottom:12px;
    }
    table{width:100%;border-collapse:separate;border-spacing:0}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    th,td{padding:14px 12px;text-align:left;border-bottom:1px solid #eef2fb;vertical-align:top}
    th{background:#f7f9ff;font-size:.94rem}
    tr:last-child td{border-bottom:none}
    .compare-note{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}
    .stars{color:#f4b400;font-weight:800;letter-spacing:2px}
    details{border-top:1px solid #eef2fb}
    details:first-of-type{border-top:none}
    summary{cursor:pointer;list-style:none;padding:14px 0;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 14px;color:var(--muted);line-height:1.78}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .review-role{font-size:.88rem;color:var(--primary);font-weight:700}
    .review-card p{margin:0;color:var(--muted);line-height:1.8}
    .case-card .thumb{
      border-radius:16px;overflow:hidden;border:1px solid var(--line);margin-bottom:12px;background:#f7f9ff;
    }
    .case-card .thumb img{width:100%;height:auto;display:block}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .article-card small{display:block;color:var(--primary);font-weight:700;margin-bottom:8px}
    .article-card a.more{display:inline-flex;margin-top:12px;color:var(--primary);font-weight:700}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    label{display:block;font-size:.92rem;font-weight:700;margin-bottom:8px}
    input,select,textarea{
      width:100%;border:1px solid #d9e1f2;background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s ease;
    }
    textarea{min-height:122px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#94aefe;box-shadow:0 0 0 4px rgba(54,100,255,.08)}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}
    .footer-cta{
      display:grid;grid-template-columns:1.1fr .9fr;gap:14px;align-items:start;
    }
    footer{
      margin-top:20px;
      padding:26px 0 18px;
      background:linear-gradient(180deg, rgba(239,244,255,.9), rgba(246,248,252,.95));
      border-top:1px solid var(--line);
      color:var(--text);
    }
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:18px}
    .footer-grid h3{margin:0 0 12px;font-size:1.02rem}
    .footer-links{display:grid;gap:10px}
    .footer-links a{color:#334}
    .copy{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:.92rem}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px;
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
      border:none;background:linear-gradient(135deg,var(--primary),#5f84ff);color:#fff;box-shadow:0 12px 24px rgba(54,100,255,.24);cursor:pointer;
    }
    .floating a.secondary{background:linear-gradient(135deg,var(--primary-2),#3ad3a5)}
    .floating a.third{background:linear-gradient(135deg,var(--accent),#ffb26b)}
    .hidden-mobile{display:inline-flex}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .scroll-reveal.visible{opacity:1;transform:none}
    .mobile-panel{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.timeline,.article-list,.footer-grid,.footer-cta{grid-template-columns:1fr 1fr}
      .compare-note,.hero-points{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:start}
    }
    @media (max-width: 780px){
      .topbar{min-height:68px}
      nav{display:none}
      .menu-toggle{display:inline-flex}
      .hero{padding-top:24px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.timeline,.article-list,.footer-grid,.footer-cta,.compare-note,.hero-points,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .hero-side,.metric,.service-card,.case-card,.article-card,.review-card,.step-card,.price-card,.timeline-card,.contact-card,.faq-item,.quote-card,.compare-wrap,.form-card{padding:16px}
      .hidden-mobile{display:none}
      .mobile-panel{
        display:none;padding:10px 0 16px;
      }
      .mobile-panel.open{display:block}
      .mobile-links{
        display:grid;gap:8px;padding:12px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)
      }
      .mobile-links a{padding:11px 12px;border-radius:12px;background:#f7f9ff}
    }