:root{
      --bg:#f6f8f4;
      --bg2:#eef4ea;
      --card:#ffffff;
      --text:#183022;
      --muted:#597061;
      --line:#dbe7d7;
      --brand:#19b84f;
      --brand2:#7bf05d;
      --accent:#0b8f39;
      --shadow:0 18px 50px rgba(24,48,34,.10);
      --radius:20px;
      --max: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",sans-serif;background:linear-gradient(180deg,var(--bg) 0%,#fff 100%);color:var(--text);line-height:1.7}
    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:40;background:rgba(246,248,244,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,231,215,.85)}
    .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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 10px 24px rgba(25,184,79,.12)}
    .brand-name{font-weight:800;font-size:18px}
    .brand-sub{font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);padding:10px 12px;border-radius:12px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 0;position:relative}
    .nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transform:scaleX(0);transform-origin:left;transition:.25s}
    .nav-links a:hover{color:var(--text)}
    .nav-links a:hover::after{transform:scaleX(1)}
    .hero{padding:34px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.feature-card,.step,.quote,.faq-item,.article,.case,.form-card,.compare-card,.price-card,.tag-cloud,.timeline,.network{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(25,184,79,.10);color:var(--accent);font-weight:700;font-size:13px}
    h1{font-size:clamp(32px,5vw,54px);line-height:1.08;margin:16px 0 14px}
    .lead{font-size:16px;color:var(--muted);max-width:58ch}
    .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-radius:14px;padding:12px 18px;font-weight:700;border:1px solid transparent;transition:.25s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#11a946);color:#fff;box-shadow:0 12px 24px rgba(25,184,79,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .badge{padding:8px 12px;border-radius:999px;background:#f2f8ef;border:1px solid #dce8d7;color:#29513a;font-size:13px}
    .hero-side{padding:22px;display:grid;gap:14px}
    .side-stat{padding:16px;border-radius:16px;background:linear-gradient(180deg,#f6fbf4,#ffffff);border:1px solid var(--line)}
    .side-stat strong{display:block;font-size:28px;line-height:1.1}
    .side-stat span{color:var(--muted);font-size:13px}
    .floating-hero{padding:18px;border-radius:18px;background:linear-gradient(135deg,rgba(25,184,79,.12),rgba(123,240,93,.12));border:1px solid rgba(25,184,79,.18)}
    .section{padding:18px 0}
    .section h2{font-size:clamp(24px,3vw,34px);margin:0 0 12px}
    .section p.section-desc{color:var(--muted);margin:0 0 18px;max-width:70ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .section-card,.feature-card,.step,.quote,.article,.case,.compare-card,.price-card,.form-card,.network,.tag-cloud,.timeline{padding:20px}
    .stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .stat{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #f7fbf6);border:1px solid var(--line)}
    .stat strong{display:block;font-size:28px}
    .stat span{color:var(--muted);font-size:13px}
    .feature-card h3,.step h3,.article h3,.case h3,.price-card h3,.form-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.step p,.article p,.case p,.price-card p,.quote p,.network p{margin:0;color:var(--muted)}
    .icon-dot{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-bottom:14px}
    .step-no{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:999px;background:#eef8ef;color:var(--accent);font-weight:800;margin-bottom:12px}
    .compare-table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:16px}
    .compare-table th,.compare-table td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    .compare-table th{background:#f5faf3}
    .pill-good{color:#0f8c39;font-weight:700}
    .pill-mid{color:#8a6a00;font-weight:700}
    .pill-bad{color:#aa3c1c;font-weight:700}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:none;border:0;color:var(--text);font-size:16px;font-weight:700;padding:0;cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;margin-top:0;color:var(--muted)}
    .faq-item.open .faq-a{max-height:180px;margin-top:12px}
    .quotes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote small{display:block;color:var(--accent);font-weight:700;margin-bottom:10px}
    .stars{letter-spacing:2px;color:#f3a400;font-size:18px}
    .article-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .article a{color:var(--accent);font-weight:700}
    .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}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;background:#fff;color:var(--text)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{margin-top:22px;padding:26px 0 18px;border-top:1px solid var(--line);background:linear-gradient(180deg,#f5faf3,#eef6ea);color:var(--text)}
    .footer a{color:#1b7d3e}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px;align-items:start}
    .foot-note{margin-top:14px;padding-top:14px;border-top:1px solid rgba(24,48,34,.10);color:var(--muted);font-size:13px}
    .sticky-tools{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:60}
    .tool{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--brand),#0f8a38);color:#fff;box-shadow:0 14px 26px rgba(25,184,79,.24);border:0;cursor:pointer}
    .floating-box{position:fixed;left:16px;bottom:16px;z-index:60;max-width:260px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
    .floating-box .top{padding:12px 14px;background:linear-gradient(135deg,#eff8ee,#fff);border-bottom:1px solid var(--line)}
    .floating-box .body{padding:14px;display:grid;gap:10px}
    .floating-box .body img{width:100%;border-radius:14px;border:1px solid var(--line)}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:22px 1fr;gap:12px;align-items:start}
    .timeline-item i{width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-top:7px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 12px;background:#f4faf3;border:1px solid var(--line);border-radius:999px;font-size:13px}
    .network{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .price-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .price-list li{display:flex;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
    .price-list li:last-child{border-bottom:0}
    .scroll-table{overflow-x:auto}
    .scroll-table::-webkit-scrollbar{height:8px}
    .scroll-table::-webkit-scrollbar-thumb{background:#c7d8c4;border-radius:999px}
    @media (max-width: 960px){
      .hero-grid,.grid-3,.stat-grid,.quotes,.article-list,.footer-grid,.network,.grid-2{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start}
      .nav-links.open{display:flex}
      .hero-main{padding:24px}
      .form-grid{grid-template-columns:1fr}
      .floating-box{display:none}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}