:root{
      --bg:#f4f8f9;
      --surface:#ffffff;
      --surface-2:#f1f7f8;
      --line:#d8e5e8;
      --text:#17313a;
      --muted:#5f7480;
      --brand:#0ea5a8;
      --brand-2:#1f7ae0;
      --accent:#20c997;
      --shadow:0 18px 40px rgba(12, 54, 64, .08);
      --radius:20px;
      --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",sans-serif;background:linear-gradient(180deg,#eff8f8 0%,#f7fbfc 28%,#f4f8f9 100%);color:var(--text)}
    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;background:rgba(244,248,249,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,229,232,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
    .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(15,77,88,.08)}
    .brand h1{font-size:18px;line-height:1.1;margin:0;font-weight:800;letter-spacing:.2px}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#29434d;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover{background:#e9f7f7;color:#0f6c73}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s;box-shadow:0 10px 24px rgba(14,165,168,.14)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(31,122,224,.18)}
    .btn-light{background:#fff;color:var(--text);border:1px solid var(--line);box-shadow:none}
    .hero{padding:42px 0 28px;position:relative;overflow:hidden}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}
    .hero::before{width:240px;height:240px;background:radial-gradient(circle,rgba(14,165,168,.16),transparent 70%);right:-60px;top:10px}
    .hero::after{width:180px;height:180px;background:radial-gradient(circle,rgba(31,122,224,.12),transparent 70%);left:-30px;bottom:-30px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.section-box,.faq-item,.review-card,.article-card,.price-card,.timeline-item,.form-card{background:rgba(255,255,255,.92);border:1px solid rgba(216,229,232,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px}
    .badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#e9fbfb;color:#0d777d;font-size:13px;font-weight:700}
    .hero h2{font-size:clamp(30px,5vw,54px);line-height:1.06;margin:16px 0 14px;letter-spacing:-.6px}
    .hero p{margin:0;color:var(--muted);line-height:1.8;font-size:16px;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .point{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f7fbfb,#eef7f8);border:1px solid #dbeaec}
    .point strong{display:block;font-size:18px;margin-bottom:4px}
    .point span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-panel{padding:24px;display:flex;flex-direction:column;gap:16px}
    .hero-panel h3{margin:0;font-size:18px}
    .hero-panel ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.75}
    .meta-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .mini{padding:14px;border-radius:16px;background:#f8fcfd;border:1px solid var(--line)}
    .mini b{display:block;font-size:18px;margin-bottom:4px}
    .mini span{color:var(--muted);font-size:13px}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h3{margin:0;font-size:26px}
    .section-head p{margin:0;color:var(--muted);max-width:64ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:20px;transition:transform .2s,box-shadow .2s}
    .card:hover,.review-card:hover,.article-card:hover,.faq-item:hover{transform:translateY(-3px)}
    .card h4,.review-card h4,.article-card h4{margin:0 0 10px;font-size:18px}
    .card p,.review-card p,.article-card 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,#e7fbfb,#e9f1ff);color:#0f6c73;font-weight:800;margin-bottom:14px}
    .section-box{padding:22px}
    .brand-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#f6fbfc;border:1px solid var(--line);color:#33505c;font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbfc);border:1px solid var(--line)}
    .step em{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:#0ea5a8;color:#fff;font-style:normal;font-weight:800;margin-bottom:10px}
    .step h4{margin:0 0 8px}
    .step p{margin:0;color:var(--muted);line-height:1.75}
    .compare-wrap{overflow-x:auto}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff;border-radius:18px;overflow:hidden}
    th,td{padding:16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#eef8f8;font-size:14px}
    td{color:#37515c;line-height:1.7}
    .highlight{background:#f7fcff}
    .faq-list{display:grid;grid-template-columns:1fr;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:transparent;border:0;color:var(--text);font-size:16px;font-weight:700;cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 20px}
    .faq-a p{margin:0 0 18px;color:var(--muted);line-height:1.75}
    .faq-item.active .faq-a{max-height:180px}
    .reviews,.articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-card,.article-card{padding:20px}
    .stars{color:#f4b400;font-size:18px;letter-spacing:2px;margin-bottom:10px}
    .price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price-card{padding:20px}
    .price{font-size:28px;font-weight:900;color:#0b6d72;margin:8px 0}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .timeline-item{padding:18px;position:relative}
    .timeline-item .month{color:#0ea5a8;font-weight:800;margin-bottom:8px}
    .form-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#27414b}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    input:focus,select:focus,textarea:focus{border-color:#7ccfd1;box-shadow:0 0 0 4px rgba(14,165,168,.10)}
    textarea{min-height:118px;resize:vertical}
    .contact-box{display:grid;gap:14px}
    .contact-line{padding:14px;border-radius:16px;background:#f7fbfc;border:1px solid var(--line)}
    .qr{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
    .qr img{width:160px;border-radius:18px;border:1px solid var(--line);background:#fff;padding:8px}
    footer{padding:18px 0 28px;color:#304650}
    .footer-box{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:#f5fafb}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,#0ea5a8,#1f7ae0);color:#fff;box-shadow:0 14px 28px rgba(16, 122, 140, .22);border:0;cursor:pointer}
    .float-link{padding:12px 14px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);font-weight:700;color:#1d3640}
    .scroll-reveal{opacity:0;transform:translateY(16px);transition:.55s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .topbar{display:flex;gap:10px;align-items:center;margin-bottom:12px;color:#4c6770;font-size:13px}
    .home-link{font-weight:800;color:#0f6c73}
    .article-list{display:grid;gap:12px}
    .article-list a{display:flex;justify-content:space-between;gap:12px;padding:14px 16px;border-radius:14px;background:#f7fbfc;border:1px solid var(--line)}
    .article-list span{color:var(--muted)}
    .service-map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .service-pill{padding:14px 16px;border-radius:16px;background:linear-gradient(180deg,#f8fcfd,#eef8f9);border:1px solid var(--line)}
    .service-pill b{display:block;margin-bottom:6px}
    .muted{color:var(--muted)}
    @media (max-width: 1024px){
      .hero-grid,.form-grid,.footer-box{grid-template-columns:1fr}
      .grid-4,.workflow,.timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
      .reviews,.articles,.grid-3,.price-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:72px;flex-direction:column;align-items:stretch;background:#fff;padding:14px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px;background:#f6fbfc}
      .hero{padding-top:26px}
      .hero-copy{padding:24px}
      .hero-points,.grid-4,.workflow,.timeline,.reviews,.articles,.grid-3,.price-grid,.service-map,.meta-row{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .container{width:min(var(--container),calc(100% - 24px))}
      .btn{width:100%}
      .hero-actions{flex-direction:column}
      .floating{right:12px;bottom:12px}
    }