:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel-2:#fff7ef;
      --line:#e6e8f0;
      --text:#1f2937;
      --muted:#5b6475;
      --brand:#ff5b4d;
      --brand-2:#245bdb;
      --accent:#ffb23f;
      --shadow:0 18px 40px rgba(24,39,75,.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;color:var(--text);background:
      radial-gradient(circle at top left, rgba(255,91,77,.12), transparent 22%),
      radial-gradient(circle at top right, rgba(36,91,219,.12), transparent 24%),
      linear-gradient(180deg,#ffffff 0%, #fafbff 32%, var(--bg) 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;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(230,232,240,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
    .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 10px 26px rgba(36,91,219,.12)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.15}
    .brand-text 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:#334155;padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover,.nav-links a.active{background:#fff1ee;color:var(--brand)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;transition:.25s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff8457);color:#fff;box-shadow:0 14px 26px rgba(255,91,77,.24)}
    .btn-primary:hover{transform:translateY(-2px)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#d6d9e5;transform:translateY(-1px)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:44px;height:44px}
    .hero{padding:46px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side,.card,.section-box,.faq-item,.review-card,.article-item,.price-box,.form-box{background:var(--panel);border:1px solid rgba(230,232,240,.95);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-main{padding:32px;position:relative;overflow:hidden;background:linear-gradient(180deg,#fff, #fff7f3)}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:999px;filter:blur(0);pointer-events:none}
    .hero-main:before{width:220px;height:220px;background:rgba(255,91,77,.12);right:-70px;top:-60px}
    .hero-main:after{width:180px;height:180px;background:rgba(36,91,219,.10);left:-60px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid #ffd9d4;color:#c43c2f;font-size:13px;font-weight:700}
    h1{font-size:clamp(30px,4vw,54px);line-height:1.08;margin:18px 0 14px;letter-spacing:-.02em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px}
    .mini{padding:14px 14px 12px;border-radius:16px;background:#fff;border:1px solid #f0e6e4}
    .mini strong{display:block;font-size:20px;color:var(--brand)}
    .mini span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;background:linear-gradient(180deg,#ffffff 0%, #f9fbff 100%)}
    .side-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
    .side-title h2{margin:0;font-size:20px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#f6f8ff;border:1px solid #e2e8ff;color:#24407f;font-size:13px}
    .stat-list{margin-top:18px;display:grid;gap:12px}
    .stat{display:flex;align-items:flex-start;gap:12px;padding:14px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .stat i{width:36px;height:36px;border-radius:12px;background:linear-gradient(135deg,rgba(255,91,77,.15),rgba(36,91,219,.12));display:inline-flex;align-items:center;justify-content:center;font-style:normal;font-weight:800;color:#1f3c88}
    .stat b{display:block;font-size:15px}
    .stat p{margin:4px 0 0;color:var(--muted);font-size:13px;line-height:1.6}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .card{padding:20px}
    .card h3{margin:10px 0 8px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .card ul{margin:10px 0 0;padding-left:18px}
    .bar{height:10px;border-radius:999px;background:#edf0f7;overflow:hidden;margin-top:12px}
    .bar span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),#ff8d66)}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{padding:20px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff8f3);border:1px solid #f3e5df}
    .step .no{display:inline-flex;width:34px;height:34px;border-radius:999px;align-items:center;justify-content:center;background:#fff0ec;color:var(--brand);font-weight:800}
    .step h3{margin:12px 0 8px}
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid #eef1f6;text-align:left;vertical-align:top}
    th{background:#fbfcff;color:#0f172a;font-size:14px}
    td{color:#475569;line-height:1.7}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-size:12px;font-weight:700}
    .compare-high{color:#d9480f;font-weight:800}
    .review{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
    .review-card{padding:18px}
    .stars{color:#ff9f1c;letter-spacing:1px;font-size:15px}
    .review-card h3{margin:10px 0 8px;font-size:16px}
    .review-card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .article-item{padding:18px;display:flex;gap:14px;align-items:flex-start}
    .article-thumb{width:92px;height:92px;border-radius:16px;object-fit:cover;flex:none;background:#f3f4f6}
    .article-item h3{margin:2px 0 8px;font-size:16px}
    .article-item p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;padding:18px 18px;background:#fff;border:0;display:flex;align-items:center;justify-content:space-between;font-size:16px;font-weight:700;color:#111827;text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-item.open .faq-a{padding-bottom:18px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8}
    .form-box{padding:22px;background:linear-gradient(180deg,#fff,#fbfcff)}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));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 #dfe4ef;border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#ff9a7f;box-shadow:0 0 0 4px rgba(255,91,77,.10)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{margin-top:14px;padding:28px 0 26px;background:#0f172a;color:#e5eefb}
    .footer a{color:#d6e5ff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}
    .footer small{color:#b8c4da;line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.06)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:16px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow)}
    .float-btn.primary{background:linear-gradient(135deg,var(--brand),#ff8d66);color:#fff;border:0}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    .muted{color:var(--muted)}
    .subsection{margin-top:22px}
    .pill-row{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#334155;font-size:13px}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .pricing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price-box{padding:22px}
    .price{font-size:34px;font-weight:900;color:var(--brand)}
    .menu-open .nav-links{display:flex}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.workflow,.review,.split,.two-col,.pricing,.footer-grid,.grid-3{grid-template-columns:1fr 1fr}
      .review{grid-template-columns:1fr 1fr 1fr}
    }
    @media (max-width: 768px){
      .menu-btn{display:inline-flex;align-items:center;justify-content:center}
      .nav{flex-wrap:wrap;padding:10px 0}
      .nav-links{display:none;width:100%;order:3;justify-content:flex-start;padding:10px 0 14px;border-top:1px solid var(--line)}
      .nav-cta{display:none}
      .hero{padding-top:24px}
      .hero-grid,.grid-4,.workflow,.review,.split,.two-col,.pricing,.footer-grid,.grid-3,.hero-points,.form-grid{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .hero-main{padding:24px}
      .hero-points{gap:10px}
      .review{grid-template-columns:1fr}
      .article-item{flex-direction:column}
      .article-thumb{width:100%;height:180px}
    }