:root{
      --bg:#fffaf0;
      --bg2:#fff4c8;
      --card:#ffffff;
      --text:#1f2430;
      --muted:#5f6675;
      --line:#eadfba;
      --primary:#ffcf2f;
      --primary2:#ffb700;
      --accent:#15223a;
      --soft:#fff9df;
      --shadow:0 18px 40px rgba(39, 35, 12, .08);
      --shadow2:0 10px 24px rgba(39, 35, 12, .10);
      --radius:22px;
      --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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,207,47,.22), transparent 28%),
        radial-gradient(circle at right 12%, rgba(21,34,58,.06), transparent 24%),
        linear-gradient(180deg, #fffef9 0%, #fffaf0 56%, #fff9ec 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 18px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(140%) blur(10px);
      background:rgba(255,250,240,.84);
      border-bottom:1px solid rgba(234,223,186,.8);
    }
    .topbar{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:4px;box-shadow:0 8px 20px rgba(0,0,0,.08)}
    .brand h2{margin:0;font-size:16px;line-height:1.1}
    .brand p{margin:4px 0 0;color:var(--muted);font-size:12px}
    .nav-wrap{display:flex;align-items:center;gap:14px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;padding:10px 12px;border-radius:12px;color:var(--accent)}
    nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    nav a{font-size:14px;color:var(--accent);padding:8px 10px;border-radius:10px;transition:.2s}
    nav a:hover{background:var(--soft);transform:translateY(-1px)}
    .cta-btn,.ghost-btn,.primary-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:.22s ease;cursor:pointer;white-space:nowrap
    }
    .primary-btn{background:linear-gradient(135deg,var(--primary) 0%,var(--primary2) 100%);color:#231b00;box-shadow:0 10px 20px rgba(255,183,0,.25)}
    .primary-btn:hover,.cta-btn:hover,.ghost-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .ghost-btn{background:#fff;border-color:var(--line);color:var(--accent)}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .95fr;gap:22px;align-items:stretch}
    .hero-main{
      position:relative;overflow:hidden;border-radius:30px;padding:34px;
      background:
        linear-gradient(135deg, rgba(255,207,47,.95), rgba(255,244,200,.82) 55%, rgba(255,255,255,.94)),
        linear-gradient(180deg,#fff 0%, #fff8dc 100%);
      border:1px solid rgba(255,183,0,.28);
      box-shadow:var(--shadow);
    }
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;right:-70px;top:-60px;background:radial-gradient(circle, rgba(21,34,58,.18), transparent 68%)}
    .hero-main:after{width:180px;height:180px;left:-60px;bottom:-70px;background:radial-gradient(circle, rgba(255,183,0,.30), transparent 68%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.7);border:1px solid rgba(255,183,0,.22);padding:7px 12px;border-radius:999px;color:#5f4a00;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,50px);line-height:1.08;letter-spacing:-.03em;color:#172033}
    .hero p{margin:0;color:#2f3746;font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .point{background:rgba(255,255,255,.72);border:1px solid rgba(255,183,0,.18);border-radius:18px;padding:14px}
    .point strong{display:block;font-size:18px;color:#16213a}
    .point span{display:block;margin-top:4px;color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{
      display:grid;gap:14px;
      grid-template-rows:auto auto 1fr;
    }
    .side-card,.card,.info-card,.review,.faq-item,.article-item,.compare-card,.form-card{
      background:rgba(255,255,255,.94);border:1px solid rgba(234,223,186,.9);border-radius:var(--radius);box-shadow:0 10px 26px rgba(30,26,10,.06)
    }
    .side-card{padding:20px}
    .side-card h3,.section-title h2{margin:0 0 10px;font-size:24px;line-height:1.2;color:#15203a}
    .side-card p{margin:0;color:var(--muted);line-height:1.75}
    .mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fffef8,#fff8dd);border:1px solid rgba(255,183,0,.18)}
    .metric b{display:block;font-size:24px;color:#172033}
    .metric span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .section{padding:18px 0}
    .section-title{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin-bottom:18px}
    .section-title p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .card{padding:18px}
    .card h3{margin:10px 0 8px;font-size:18px}
    .card p,.card li,.review p,.article-item p{color:var(--muted);line-height:1.7}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(255,207,47,.3),rgba(255,183,0,.16));border:1px solid rgba(255,183,0,.18);
      color:#1f2430;font-size:20px;font-weight:800
    }
    .chip-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:10px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#374156;font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:22px;background:linear-gradient(180deg,#fff,#fffaf0);border:1px solid var(--line);position:relative}
    .step:after{content:"";position:absolute;right:16px;top:16px;width:38px;height:38px;border-radius:50%;background:rgba(255,207,47,.18)}
    .step b{display:block;font-size:20px;color:#15203a}
    .step span{display:inline-flex;margin-top:10px;color:#7a6a2c;font-weight:700}
    .compare{
      overflow:hidden
    }
    .compare table{width:100%;border-collapse:separate;border-spacing:0}
    .compare th,.compare td{padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    .compare th{background:#fff8dc;color:#172033;font-size:14px}
    .compare td{color:#425064;font-size:14px}
    .score{
      display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;margin-bottom:16px
    }
    .stars{color:#ffb700;font-size:20px;letter-spacing:2px}
    .score .big{font-size:34px;font-weight:900;color:#15203a}
    .reviews,.articles,.faq-list,.network,.related{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{padding:18px}
    .avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#ffe37a,#ffbf00);font-weight:900;color:#2a2100}
    .review-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
    .review-head b{display:block;color:#15203a}
    .review-head small{display:block;color:var(--muted);margin-top:3px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:12px;
      font-size:16px;font-weight:800;color:#15203a;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px;color:var(--muted);line-height:1.75}
    .faq-item.active .faq-a{padding-bottom:18px;max-height:180px}
    .faq-item.active .faq-q .toggle{transform:rotate(45deg)}
    .toggle{transition:.2s}
    .article-item{padding:18px}
    .article-item time{color:#8a7a3a;font-size:13px;font-weight:700}
    .article-item h3{margin:8px 0 8px;font-size:18px}
    .form-card{padding:20px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700;color:#22304a}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#ffbf00;box-shadow:0 0 0 4px rgba(255,191,0,.14)}
    .form-actions{grid-column:1/-1;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
    .foot-cta{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:22px;border-radius:26px;background:linear-gradient(135deg,#172033,#223356);color:#fff;box-shadow:var(--shadow)}
    .foot-cta p{margin:6px 0 0;color:rgba(255,255,255,.8)}
    .site-footer{margin-top:18px;padding:24px 0 30px;border-top:1px solid rgba(234,223,186,.9);background:linear-gradient(180deg, rgba(255,250,240,.2), rgba(255,242,199,.35))}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:18px}
    .footer-col h3{margin:0 0 12px;font-size:18px;color:#16213a}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#394355;font-size:13px}
    .copyright{margin-top:18px;color:#6b7280;font-size:13px;line-height:1.7}
    .float-tools{position:fixed;right:16px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px}
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:1px solid rgba(234,223,186,.95);background:#fff;box-shadow:0 12px 24px rgba(0,0,0,.08);
      display:grid;place-items:center;color:#15203a;cursor:pointer
    }
    .qrcode{display:grid;grid-template-columns:92px 1fr;gap:14px;align-items:center}
    .qrcode img{width:92px;height:92px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}
    .note{font-size:13px;color:var(--muted);line-height:1.7}
    .table-wrap{overflow:auto}
    .scroll-x{min-width:920px}
    .muted{color:var(--muted)}
    .anchor-spacer{scroll-margin-top:92px}
    .tagline{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
    .tagline .chip{background:rgba(255,255,255,.74)}
    .list{margin:0;padding-left:18px;display:grid;gap:8px}
    .list li{color:var(--muted);line-height:1.7}
    .join-box{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}
    .simple-card{padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .section-line{height:1px;background:linear-gradient(90deg,transparent,rgba(255,183,0,.55),transparent);margin:12px 0 0}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.articles,.faq-list,.network,.related,.footer-grid{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 768px){
      .topbar{flex-wrap:wrap}
      .nav-toggle{display:inline-flex}
      nav{display:none;width:100%;padding:10px 0 0}
      nav.open{display:flex;flex-direction:column;align-items:flex-start}
      .nav-wrap{width:100%;justify-content:space-between}
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.articles,.faq-list,.network,.related,form,.mini-grid,.join-box{grid-template-columns:1fr}
      .hero-main,.side-card,.card,.form-card,.foot-cta{padding:20px}
      .section-title{flex-direction:column;align-items:flex-start}
      .compare th,.compare td{min-width:150px}
      .score{grid-template-columns:1fr}
    }
    [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .5s ease, transform .5s ease}
    [data-reveal].visible{opacity:1;transform:translateY(0)}
    .pulse{animation:pulse 2.8s ease-in-out infinite}
    @keyframes pulse{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}}