:root{
      --bg:#f5f8fb;
      --bg2:#eaf8fb;
      --card:#ffffff;
      --card2:#f7fbfd;
      --line:#d7e4ec;
      --text:#163042;
      --muted:#5c7283;
      --primary:#0f9fb8;
      --primary2:#1f6fff;
      --accent:#26c6da;
      --shadow:0 16px 40px rgba(11, 55, 78, .09);
      --radius:20px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:
      radial-gradient(circle at top left, rgba(38,198,218,.12), transparent 28%),
      radial-gradient(circle at top right, rgba(31,111,255,.10), transparent 26%),
      linear-gradient(180deg,var(--bg),#fff 35%,#f7fcfd 100%)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px,var(--max));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(245,248,251,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(215,228,236,.8)}
    .nav-wrap{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:5px;box-shadow:0 6px 20px rgba(15,159,184,.12)}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px}
    .nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .nav a:hover,.nav a.active{color:var(--text);background:#eaf7fb}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.service-card,.review-card,.case-card,.step-card,.metric,.faq-item,.article-card,.compare-card,.price-card,.network-card,.timeline-item,.tag-cloud,.table-wrap,.form-card{background:var(--card);border:1px solid rgba(215,228,236,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before{content:"";position:absolute;inset:auto -10% -30% auto;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle, rgba(38,198,218,.22), transparent 65%);animation:float 8s ease-in-out infinite}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#e8fbff;color:#0a7286;font-size:13px;font-weight:600}
    h1{margin:16px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .hero p{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:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:14px;padding:13px 18px;font-weight:700;cursor:pointer;transition:.2s ease;box-shadow:0 10px 24px rgba(15,159,184,.12)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .chip{padding:8px 12px;background:#f2fbfd;border:1px solid #dceff4;border-radius:999px;color:#24566d;font-size:13px}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-box{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f7feff,#effafc);border:1px solid #dff0f4}
    .mini-box h3{margin:0 0 8px;font-size:16px}
    .mini-box p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:18px 0 10px}
    .metric{padding:20px}
    .metric strong{display:block;font-size:28px;line-height:1;color:#0e6071}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.6}
    section{padding:22px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .section-card{padding:24px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .service-card,.case-card,.review-card,.step-card,.compare-card,.price-card,.network-card,.article-card{padding:18px}
    .service-card h3,.case-card h3,.review-card h3,.step-card h3,.compare-card h3,.price-card h3,.network-card h3,.article-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.case-card p,.review-card p,.step-card p,.compare-card p,.price-card p,.network-card p,.article-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#e8fbff,#e7efff);color:#0f8ca0;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid #e6eef2;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f5fbfd;color:#21485c}
    tr:hover td{background:#fbfeff}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:18px 20px;background:#fff;border:none;color:var(--text);font-size:16px;font-weight:700;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.open .faq-q{background:#f5fbfd}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{font-size:15px;line-height:1.8;color:var(--text)}
    .author{margin-top:14px;color:#0e6071;font-weight:700}
    .articles,.network,.prices,.timeline,.tags{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .tag-cloud{padding:18px;display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 12px;border-radius:999px;background:#f2fbfd;border:1px solid #dbeef3;color:#2a6077;font-size:13px}
    .timeline-item{padding:18px;position:relative}
    .timeline-item strong{display:block;margin-bottom:8px}
    .timeline-item:before{content:"";width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:inline-block;margin-right:8px}
    .form-card{padding:22px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .full{grid-column:1/-1}
    label{display:block;font-size:14px;font-weight:700;margin-bottom:8px;color:#244657}
    input,select,textarea{width:100%;border:1px solid #d7e4ec;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#71d6e3;box-shadow:0 0 0 4px rgba(38,198,218,.12)}
    .footer{padding:26px 0 28px;margin-top:8px;border-top:1px solid rgba(215,228,236,.9);background:#f8fcfd;color:#244657}
    .footer a{color:#0f7587}
    .footer .grid-3{align-items:start}
    .floating{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 28px rgba(15,159,184,.25)}
    .float-panel{position:absolute;right:60px;bottom:0;width:260px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);display:none}
    .floating.open .float-panel{display:block}
    .float-panel img{width:100%;border-radius:14px}
    .fade-up{opacity:0;transform:translateY(14px);transition:.5s ease}
    .fade-up.show{opacity:1;transform:none}
    @keyframes float{50%{transform:translateY(-10px)}}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.network,.prices,.timeline,.tags,.metrics{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav{display:none;position:absolute;left:16px;right:16px;top:66px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);justify-content:flex-start}
      .nav.open{display:flex}
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.network,.prices,.timeline,.tags,.metrics,form{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .section-head{flex-direction:column;align-items:start}
      .floating{right:12px;bottom:12px}
      .float-panel{width:min(260px,calc(100vw - 90px))}
      .metrics{grid-template-columns:1fr 1fr}
    }