:root{
      --bg:#f5fbfb;
      --bg2:#eef8f7;
      --card:#ffffff;
      --text:#17313a;
      --muted:#5f7380;
      --line:#d8e8e6;
      --brand:#14b8a6;
      --brand2:#0ea5e9;
      --brand3:#2563eb;
      --shadow:0 18px 50px rgba(18,79,92,.10);
      --radius:22px;
      --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;background:linear-gradient(180deg,#f7fcfc 0%,#eef8f7 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(247,252,252,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,232,230,.8)}
    .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;padding:5px;box-shadow:0 10px 25px rgba(20,184,166,.12)}
    .brand strong{display:block;font-size:17px;line-height:1.2}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#294953;padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover{background:#e8f8f6;color:#0c7e71}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .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:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);color:#fff;box-shadow:0 12px 24px rgba(14,165,233,.18)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:#1f4450}
    .btn:hover{transform:translateY(-1px);filter:saturate(1.04)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px;color:#21424d}
    .hero{padding:34px 0 20px;position:relative;overflow:hidden}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none;filter:blur(12px)}
    .hero::before{width:280px;height:280px;background:radial-gradient(circle,rgba(20,184,166,.18),transparent 70%);right:-70px;top:0}
    .hero::after{width:220px;height:220px;background:radial-gradient(circle,rgba(14,165,233,.18),transparent 70%);left:-70px;bottom:-30px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.step,.article,.compare,.timeline-item,.price-card,.contact-box{background:rgba(255,255,255,.86);border:1px solid rgba(216,232,230,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;background:#eafaf8;color:#0d7e71;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0 20px}
    .quick-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
    .quick-points div{padding:14px 14px;background:linear-gradient(180deg,#f7fffe,#eef9f8);border:1px solid #d8eeeb;border-radius:18px}
    .quick-points strong{display:block;font-size:18px;margin-bottom:4px}
    .quick-points span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:grid;gap:14px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f5fbfb);border:1px solid var(--line)}
    .metric b{display:block;font-size:28px;color:#0f766e;line-height:1}
    .metric small{display:block;color:var(--muted);margin-top:6px;line-height:1.5}
    .side-note{padding:18px;border-radius:18px;background:linear-gradient(135deg,rgba(20,184,166,.08),rgba(37,99,235,.08));border:1px solid #d8eeeb}
    .side-note h3,.section-title h2{margin:0 0 10px;font-size:24px}
    .side-note p,.section-desc{margin:0;color:var(--muted);line-height:1.8}
    .section{padding:18px 0 8px}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title p{margin:0;color:var(--muted);max-width:70ch;line-height:1.75}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card,.review,.article,.compare,.price-card,.timeline-item,.contact-box,.faq-item,.panel{padding:20px}
    .card h3,.review h3,.article h3,.price-card h3,.contact-box h3{margin:0 0 10px;font-size:18px}
    .card p,.review p,.article p,.price-card p,.contact-box p,.panel p{margin:0;color:var(--muted);line-height:1.75}
    .icon-badge{width:46px;height:46px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(135deg,rgba(20,184,166,.12),rgba(14,165,233,.12));color:#0e7e75;font-weight:800;margin-bottom:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#31505b;font-size:13px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:20px;position:relative;overflow:hidden}
    .step em{font-style:normal;display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:700;margin-bottom:12px}
    .step h3{margin:0 0 8px}
    .compare-wrap{overflow:auto;border-radius:22px}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:860px;background:#fff}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    th{background:#f5fbfb;color:#23444f;font-size:14px}
    td{color:#36535e;font-size:14px;line-height:1.7}
    tr:last-child td{border-bottom:0}
    .rating{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;background:#eefaf8;color:#0f766e;font-weight:700}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .faq-item summary{cursor:pointer;list-style:none;font-weight:700;color:#17313a}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{padding-top:10px}
    .reviews .review .role{color:#0f766e;font-weight:700;font-size:13px;margin-bottom:10px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article .meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
    .article .meta span{font-size:12px;color:#0e766f;background:#eefaf8;border:1px solid #d8eeeb;padding:6px 10px;border-radius:999px}
    .contact-grid{display:grid;grid-template-columns:1fr .8fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:700;color:#294953}
    input,select,textarea{width:100%;border:1px solid #d6e7e5;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#57cfc1;box-shadow:0 0 0 4px rgba(20,184,166,.12)}
    textarea{min-height:120px;resize:vertical}
    .footer{margin-top:18px;padding:22px 0 26px;border-top:1px solid rgba(216,232,230,.9);background:rgba(245,251,251,.7)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px;align-items:start}
    .footer a{color:#1c5f75}
    .footer small,.footer p{color:#5b727d;line-height:1.8}
    .footer .links{display:flex;flex-wrap:wrap;gap:10px}
    .footer .links a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 16px 24px rgba(14,165,233,.22);border:0;cursor:pointer}
    .客服{position:fixed;right:16px;top:90px;z-index:60;width:320px;max-width:calc(100vw - 32px);background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:14px;display:none}
    .客服.open{display:block}
    .客服 h4{margin:0 0 10px}
    .客服 .qr{display:flex;gap:12px;align-items:center}
    .客服 img{width:110px;height:auto;border-radius:14px;border:1px solid var(--line)}
    .scroll-top{display:none}
    .show{display:grid}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:88px 1fr;gap:16px;align-items:start}
    .timeline-item strong{color:#0f766e}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-card .amount{font-size:30px;font-weight:800;color:#0f766e;margin:8px 0}
    .badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#eafaf8;color:#0f766e;font-size:12px;font-weight:700}
    .mobile-only{display:none}
    .mini-list{display:grid;gap:10px;margin:14px 0 0;padding:0;list-style:none}
    .mini-list li{display:flex;gap:10px;align-items:flex-start;color:#35545f;line-height:1.65}
    .mini-list li::before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-top:8px;flex:0 0 auto}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.steps,.split,.contact-grid,.footer-grid,.articles,.price-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .quick-points,.metric-grid{grid-template-columns:1fr 1fr}
      .客服{top:auto;bottom:82px}
      .section-title{align-items:flex-start;flex-direction:column}
      .timeline-item{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max),calc(100% - 24px))}
      .hero-main,.hero-side,.card,.review,.article,.compare,.timeline-item,.price-card,.contact-box,.faq-item,.panel{padding:18px}
      .hero{padding-top:22px}
      .quick-points,.metric-grid{grid-template-columns:1fr}
      h1{font-size:30px}
      .hero-actions .btn{width:100%}
      .nav{padding:12px 0}
      .brand strong{font-size:16px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
    .reveal.visible{opacity:1;transform:none}