:root{
      --bg:#f5fbf7;
      --bg2:#edf8f2;
      --card:#ffffff;
      --ink:#163026;
      --muted:#5f7269;
      --line:#d7e8de;
      --brand:#20a56a;
      --brand2:#4cc8a1;
      --accent:#ffb85c;
      --shadow:0 18px 40px rgba(22,48,38,.08);
      --radius:20px;
      --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(--ink);
      background:
        radial-gradient(circle at top left, rgba(76,200,161,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(32,165,106,.10), transparent 26%),
        linear-gradient(180deg, #f7fcf9 0%, #f3fbf6 38%, #f7fbf8 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(100% - 32px, var(--container)); margin:0 auto}
    header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(247,252,249,.86);
      border-bottom:1px solid rgba(215,232,222,.9);
    }
    .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;border:1px solid var(--line);padding:4px}
    .brand h2{font-size:18px;line-height:1.2;margin:0}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .menu{display:flex;flex-wrap:wrap;gap:6px;align-items:center;justify-content:flex-end}
    .menu a{
      font-size:14px;color:#244337;padding:9px 12px;border-radius:999px;
      transition:.25s ease;background:transparent;
    }
    .menu a:hover,.menu a:focus{background:#e8f6ef;color:#0f5f3d}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 16px;border-radius:14px;border:1px solid transparent;
      font-weight:700;cursor:pointer;transition:.25s ease;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#1c8f5d);color:#fff;box-shadow:0 12px 24px rgba(32,165,106,.22)}
    .btn-primary:hover{transform:translateY(-1px);filter:saturate(1.05)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
    .btn-ghost:hover{border-color:#b8dcc8;transform:translateY(-1px)}
    .burger{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:12px}
    .burger span{display:block;width:18px;height:2px;background:#27483a;margin:4px auto;border-radius:2px}
    .hero{
      padding:42px 0 24px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .85fr;gap:20px;align-items:stretch;
    }
    .hero-card,.side-card,.section-card,.review-card,.faq-item,.article-card,.case-card,.metric,.feature,.step,.compare-box,.contact-box,.price-box,.network-card,.timeline-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(215,232,222,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{padding:34px;position:relative;overflow:hidden}
    .hero-card:before{
      content:"";position:absolute;inset:auto -80px -90px auto;width:240px;height:240px;border-radius:50%;
      background:radial-gradient(circle, rgba(76,200,161,.26), transparent 66%);
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:#e7f7ef;color:#0f6b43;border:1px solid #c8ead8;
      padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700;
    }
    h1{font-size:clamp(30px,4vw,52px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:720px;margin:0 0 22px}
    .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:20px}
    .mini{
      background:linear-gradient(180deg,#f8fcfa,#eef8f2);
      border:1px solid #d9eadf;border-radius:16px;padding:14px;
    }
    .mini strong{display:block;font-size:18px;margin-bottom:4px}
    .mini span{color:var(--muted);font-size:13px;line-height:1.5}
    .side-card{padding:22px}
    .side-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .tag-cloud span{
      padding:8px 10px;border-radius:999px;background:#eef8f3;border:1px solid #d9eadf;
      color:#184233;font-size:13px;
    }
    .platform-preview{
      margin-top:18px;padding:16px;border-radius:18px;background:linear-gradient(135deg,#eaf9f2,#f8fcfa);
      border:1px dashed #bfe0cc;
    }
    .platform-preview .row{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}
    .platform-preview .score{font-size:28px;font-weight:900;color:#0f6b43}
    .platform-preview ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.75}
    section{padding:16px 0}
    .section-card{padding:28px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:20px}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:700px;line-height:1.7}
    .metrics,.features,.steps,.reviews,.cases,.articles,.network,.compare,.timeline{display:grid;gap:16px}
    .metrics{grid-template-columns:repeat(4,minmax(0,1fr))}
    .metric{padding:20px}
    .metric strong{display:block;font-size:28px;line-height:1;color:#0f6b43;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:14px;line-height:1.6}
    .features{grid-template-columns:repeat(3,minmax(0,1fr))}
    .feature{padding:20px}
    .feature h3,.step h3,.case-card h3,.article-card h3,.review-card h3,.timeline-card h3,.network-card h3{margin:0 0 10px;font-size:18px}
    .feature p,.step p,.case-card p,.article-card p,.review-card p,.timeline-card p,.network-card p{margin:0;color:var(--muted);line-height:1.75}
    .badge{display:inline-flex;align-items:center;gap:6px;margin-bottom:12px;padding:7px 10px;border-radius:999px;background:#edf9f3;color:#156645;font-size:12px;font-weight:700}
    .steps{grid-template-columns:repeat(4,minmax(0,1fr))}
    .step{padding:20px;position:relative}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,#20a56a,#62d2ac);color:#fff;font-weight:800;align-items:center;justify-content:center;margin-bottom:14px}
    .compare-box table{width:100%;border-collapse:collapse}
    .compare-box th,.compare-box td{border-bottom:1px solid var(--line);padding:14px 12px;text-align:left;vertical-align:top}
    .compare-box th{background:#f3faf6;font-size:14px}
    .compare-box td{color:#294336;line-height:1.7}
    .scroll-x{overflow:auto;border-radius:18px}
    .review-card,.case-card,.article-card,.timeline-card,.network-card{padding:20px}
    .reviews{grid-template-columns:repeat(3,minmax(0,1fr))}
    .cases,.articles{grid-template-columns:repeat(3,minmax(0,1fr))}
    .network{grid-template-columns:repeat(2,minmax(0,1fr))}
    .timeline{grid-template-columns:repeat(3,minmax(0,1fr))}
    .quote{font-size:15px;line-height:1.8;color:#284336}
    .stars{color:#f1b63f;letter-spacing:2px;font-size:16px}
    .article-meta,.case-meta,.timeline-meta{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 10px;color:#587065;font-size:13px}
    .pill{padding:6px 10px;background:#eef8f3;border-radius:999px;border:1px solid #d9eadf}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;display:flex;justify-content:space-between;align-items:center;gap:14px;
      padding:18px 20px;background:transparent;border:0;color:var(--ink);font-size:16px;font-weight:700;text-align:left;cursor:pointer;
    }
    .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{padding-bottom:18px;max-height:240px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#244337}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid #cfe2d7;
      background:#fff;color:var(--ink);font:inherit;outline:none;transition:.2s ease;
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#74caa4;box-shadow:0 0 0 4px rgba(76,200,161,.12)}
    .full{grid-column:1/-1}
    footer{
      margin-top:18px;
      background:#17372a;
      color:#e8f5ee;
      padding:26px 0 20px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    footer a{color:#baf1d8}
    .footer-grid{display:grid;grid-template-columns:1.2fr .9fr 1fr;gap:18px;align-items:start}
    .footer-grid p,.footer-grid li{color:#d5e8de;line-height:1.8}
    .footer-grid ul{margin:0;padding-left:18px}
    .contact-row{display:grid;grid-template-columns:1fr 240px;gap:16px;align-items:start}
    .qr{background:#fff;border-radius:18px;padding:12px;border:1px solid var(--line)}
    .qr img{border-radius:12px}
    .float{
      position:fixed;right:16px;bottom:16px;z-index:80;display:flex;flex-direction:column;gap:10px;
    }
    .float a,.float button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);
      background:#fff;box-shadow:var(--shadow);display:grid;place-items:center;cursor:pointer;
      color:#214336;font-weight:800;
    }
    .backtop{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s ease}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .mobile-menu{display:none;padding:0 0 16px}
    .mobile-menu .menu{justify-content:flex-start}
    .hr{height:1px;background:linear-gradient(90deg,transparent,rgba(120,160,140,.35),transparent);margin:18px 0}
    .note{font-size:13px;color:var(--muted);line-height:1.7}
    .rating{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .rating .score{font-size:38px;font-weight:900;color:#0f6b43}
    .center{display:flex;align-items:center;justify-content:center}
    .image-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .image-row img{border-radius:16px;border:1px solid var(--line);background:#fff}
    @media (max-width: 1024px){
      .hero-grid,.footer-grid,.contact-row{grid-template-columns:1fr}
      .metrics,.features,.steps,.reviews,.cases,.articles,.network,.timeline,.image-row{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width: 760px){
      .menu{display:none}
      .burger{display:inline-grid;place-items:center}
      .mobile-menu.show{display:block}
      .hero{padding-top:22px}
      .hero-card{padding:24px}
      .hero-points,.metrics,.features,.steps,.reviews,.cases,.articles,.network,.timeline,.image-row,.form-grid{grid-template-columns:1fr}
      .section-card{padding:22px}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav-actions .btn-ghost{display:none}
      .footer-grid{grid-template-columns:1fr}
      .compare-box table{min-width:920px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}