:root{
      --bg:#f4f8fb;
      --panel:#ffffff;
      --panel-2:#f8fbfd;
      --text:#163042;
      --muted:#5d7281;
      --line:#d9e6ee;
      --brand:#0f8fb8;
      --brand-2:#27c3b0;
      --brand-3:#0b6f95;
      --accent:#e8f8fb;
      --shadow:0 18px 40px rgba(13, 74, 97, .10);
      --radius:20px;
      --radius-sm:14px;
      --max: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 top left, rgba(39,195,176,.14), transparent 28%),
        radial-gradient(circle at 90% 10%, rgba(15,143,184,.10), transparent 24%),
        linear-gradient(180deg, #f7fbfd 0%, #f2f7fa 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(247,251,253,.82);
      border-bottom:1px solid rgba(217,230,238,.8);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:72px;
    }
    .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:4px; box-shadow:0 8px 20px rgba(15,143,184,.12)}
    .brand-text{display:flex; flex-direction:column; gap:2px; min-width:0}
    .brand-text strong{font-size:18px; letter-spacing:.4px}
    .brand-text span{font-size:12px; color:var(--muted)}
    .menu-btn{display:none; border:1px solid var(--line); background:var(--panel); border-radius:12px; padding:10px 12px; color:var(--text)}
    .nav-links{display:flex; align-items:center; gap:6px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{
      padding:9px 12px; border-radius:999px; color:#355265; font-size:14px;
      transition:.2s ease; border:1px solid transparent;
    }
    .nav-links a:hover{background:var(--accent); border-color:#caedf3; transform:translateY(-1px)}
    .nav-cta{
      display:inline-flex; align-items:center; justify-content:center;
      padding:10px 16px; border-radius:999px; background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff; font-weight:700; box-shadow:0 12px 24px rgba(15,143,184,.18);
    }
    .hero{
      padding:32px 0 18px;
    }
    .hero-wrap{
      display:grid; grid-template-columns:1.35fr .95fr; gap:20px; align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.info-card,.review-card,.faq-item,.article-card,.service-card,.case-card,.price-card,.timeline-card,.compare-card,.form-card,.footer-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(217,230,238,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{
      padding:30px;
      position:relative;
      overflow:hidden;
      min-height:420px;
    }
    .hero-main:before,.hero-main:after{
      content:""; position:absolute; border-radius:50%; pointer-events:none;
      background:radial-gradient(circle, rgba(39,195,176,.18), transparent 60%);
    }
    .hero-main:before{width:220px;height:220px; right:-60px; top:-50px}
    .hero-main:after{width:180px;height:180px; right:40px; bottom:-70px}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background:var(--accent); color:#0c6b86; font-size:13px; font-weight:700}
    h1{margin:16px 0 14px; font-size:clamp(32px, 5vw, 54px); line-height:1.08; letter-spacing:-.6px}
    .hero p{margin:0; color:var(--muted); line-height:1.8}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:13px 18px; border-radius:14px; font-weight:700; border:1px solid transparent;
      transition:.22s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:0 14px 28px rgba(15,143,184,.22)}
    .btn-secondary{background:#fff; border-color:var(--line); color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px}
    .mini{
      padding:14px; border-radius:16px; background:linear-gradient(180deg,#fff,#f6fbfd);
      border:1px solid #dfeaf0;
    }
    .mini strong{display:block; font-size:20px; margin-bottom:6px}
    .mini span{font-size:13px; color:var(--muted)}
    .hero-side{padding:22px; display:grid; gap:14px; align-content:start}
    .side-box{
      padding:16px; border-radius:16px; background:linear-gradient(180deg,#f8fcfe,#eef8fb); border:1px solid #d6eaf1
    }
    .side-box h3,.section-head h2{margin:0 0 10px; font-size:22px}
    .side-box ul{margin:0; padding-left:18px; color:var(--muted); line-height:1.8}
    .service-strip{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin:20px 0}
    .info-card{padding:18px}
    .info-card h3{margin:0 0 10px; font-size:16px}
    .info-card p{margin:0; color:var(--muted); line-height:1.7; font-size:14px}
    section{padding:18px 0}
    .section-card{padding:24px}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:18px}
    .section-head p{margin:0; color:var(--muted); max-width:720px; line-height:1.7}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .service-card,.case-card,.review-card,.article-card,.price-card,.timeline-card{padding:18px}
    .service-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3,.timeline-card h3{margin:0 0 10px; font-size:17px}
    .tagcloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:9px 12px; border-radius:999px; background:#f3fbfd; border:1px solid #d7edf2; color:#275066; font-size:13px}
    .metrics{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .metric{padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff,#f6fbfd); border:1px solid #dcebf1}
    .metric strong{display:block; font-size:30px; color:#0d789a}
    .metric span{color:var(--muted); font-size:13px}
    .timeline{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .timeline-card .step{width:34px; height:34px; display:inline-flex; align-items:center; justify-content:center; border-radius:50%; background:var(--accent); color:#0d789a; font-weight:800; margin-bottom:10px}
    .compare-table{width:100%; border-collapse:separate; border-spacing:0; overflow:hidden}
    .compare-scroll{overflow:auto; border:1px solid var(--line); border-radius:18px}
    .compare-table th,.compare-table td{padding:14px 16px; border-bottom:1px solid #e5eef3; text-align:left; white-space:nowrap}
    .compare-table th{background:#f3fafc; color:#17394f}
    .compare-table tr:last-child td{border-bottom:none}
    .rating{display:flex; gap:4px; color:#f4b400; font-size:18px}
    .two-col{display:grid; grid-template-columns:1.05fr .95fr; gap:16px}
    .form-card{padding:22px}
    form{display:grid; gap:14px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    input,select,textarea{
      width:100%; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:12px 14px; font:inherit; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8cd7e7; box-shadow:0 0 0 4px rgba(39,195,176,.12)}
    .submit-row{display:flex; gap:12px; align-items:center; flex-wrap:wrap}
    .faq{display:grid; gap:12px}
    .faq-item summary{
      cursor:pointer; list-style:none; padding:16px 18px; display:flex; justify-content:space-between; align-items:center; gap:16px;
      font-weight:700; color:#17394f;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 18px 16px; color:var(--muted); line-height:1.8}
    .faq-item[open]{border-color:#bfe4ec}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review-card .role{display:inline-flex; margin-bottom:12px; padding:6px 10px; border-radius:999px; background:#eef9fb; color:#0d789a; font-size:12px; font-weight:700}
    .articles{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .article-card p,.case-card p,.review-card p{margin:0; color:var(--muted); line-height:1.75}
    .case-meta,.article-meta{display:flex; gap:10px; flex-wrap:wrap; margin-top:12px; color:#4c6676; font-size:13px}
    .footer{
      padding:14px 0 26px;
    }
    .footer-card{padding:22px}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:18px}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:8px 12px; border-radius:999px; background:#f4fafc; border:1px solid #dcebf1; color:#21556e; font-size:13px}
    .copyright{margin-top:14px; color:#678090; font-size:13px; line-height:1.8}
    .floating{
      position:fixed; right:16px; bottom:18px; z-index:60;
      display:flex; flex-direction:column; gap:10px;
    }
    .float-btn{
      display:inline-flex; align-items:center; justify-content:center; width:52px; height:52px; border-radius:16px;
      background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:0 16px 28px rgba(15,143,184,.24);
      border:none; cursor:pointer; font-size:20px;
    }
    .customer-box{
      position:fixed; left:16px; bottom:18px; z-index:60;
      width:min(280px, calc(100vw - 32px));
      display:none; background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow);
      overflow:hidden;
    }
    .customer-box.show{display:block}
    .customer-box header{padding:12px 14px; background:#f3fafc; border-bottom:1px solid #e1edf2; font-weight:700}
    .customer-box .body{padding:14px; display:grid; gap:10px; color:var(--muted)}
    .customer-box .body a{color:#0d789a; font-weight:700}
    .banner-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .banner-grid img{border-radius:18px; border:1px solid var(--line); box-shadow:var(--shadow)}
    .accordion-note{margin-top:14px; color:var(--muted); font-size:13px}
    .table-note{margin-top:10px; color:var(--muted); font-size:13px}
    @media (max-width: 1024px){
      .hero-wrap,.two-col,.footer-grid,.grid-4,.metrics,.timeline,.reviews,.articles,.banner-grid,.service-strip{grid-template-columns:repeat(2,1fr)}
      .grid-3{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .menu-btn{display:inline-flex}
      .nav-links{
        display:none; position:absolute; left:16px; right:16px; top:72px; padding:12px;
        background:rgba(255,255,255,.98); border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow);
        flex-direction:column; align-items:stretch;
      }
      .nav-links.show{display:flex}
      .nav-links a{width:100%; text-align:center}
      .hero-wrap,.two-col,.footer-grid,.grid-3,.grid-4,.metrics,.timeline,.reviews,.articles,.banner-grid,.service-strip,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:22px; min-height:auto}
      .hero-points{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .container{width:min(var(--max), calc(100% - 24px))}
      .floating{right:12px; bottom:12px}
      .customer-box{left:12px; bottom:12px}
    }
    .reveal{opacity:0; transform:translateY(18px); transition:.6s ease}
    .reveal.visible{opacity:1; transform:translateY(0)}