:root{
      --bg:#fff8f4;
      --bg2:#fffdfb;
      --card:#ffffff;
      --text:#1f2430;
      --muted:#5a6475;
      --line:#ead7d0;
      --primary:#d82020;
      --primary2:#ff5a3c;
      --accent:#ffb08a;
      --shadow:0 16px 40px rgba(120, 31, 18, .10);
      --radius:22px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(216,32,32,.08), transparent 30%),
      radial-gradient(circle at 85% 10%, rgba(255,90,60,.08), transparent 22%),
      linear-gradient(180deg,#fff8f4 0%,#fffdfb 40%,#fff7f2 100%);
      color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(255,250,248,.88);backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid rgba(234,215,208,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;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;box-shadow:0 8px 18px rgba(0,0,0,.06)}
    .brand strong{font-size:1.02rem;display:block}
    .brand span{font-size:.82rem;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:.92rem;color:#394255;padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover,.nav-links a:focus{background:#fff;border-color:var(--line);box-shadow:0 8px 22px rgba(216,32,32,.10);color:var(--primary)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:999px;border:1px solid transparent;font-weight:700;transition:.25s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(216,32,32,.22)}
    .btn-ghost{background:#fff;color:var(--primary);border-color:#ffd4cb}
    .btn:hover{transform:translateY(-2px)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    main{overflow:hidden}
    .hero{padding:42px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.section-card{background:linear-gradient(180deg,#fff 0%,#fffaf8 100%);border:1px solid rgba(234,215,208,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(216,32,32,.08);color:var(--primary);font-weight:700;font-size:.86rem}
    h1{margin:14px 0 14px;font-size:clamp(2rem,4.2vw,3.8rem);line-height:1.08;letter-spacing:-.02em}
    .lead{font-size:1.06rem;color:var(--muted);max-width:58ch}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
    .mini{background:#fff7f4;border:1px solid #f4ddd4;border-radius:18px;padding:14px}
    .mini strong{display:block;font-size:1rem;margin-bottom:4px}
    .mini span{color:var(--muted);font-size:.92rem}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-panel{padding:22px;display:flex;flex-direction:column;gap:14px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff4ef);border:1px solid #f4ddd4}
    .stat b{display:block;font-size:1.35rem;color:var(--primary)}
    .stat span{font-size:.92rem;color:var(--muted)}
    .panel-note{padding:16px;border-radius:18px;background:linear-gradient(135deg,rgba(216,32,32,.08),rgba(255,90,60,.06));border:1px solid #f3cec2}
    .section{padding:18px 0 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;margin-bottom:16px}
    .section-head h2{margin:0;font-size:1.8rem}
    .section-head p{margin:0;color:var(--muted);max-width:70ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:18px}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(216,32,32,.13),rgba(255,90,60,.10));color:var(--primary);font-weight:900;margin-bottom:12px}
    .card h3{margin:0 0 8px;font-size:1.06rem}
    .card p{margin:0;color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid #f0ddd5;color:#44505f;font-size:.92rem}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{padding:18px;border-radius:20px;background:#fff;border:1px solid #f0ddd5}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:var(--primary);color:#fff;font-weight:700;margin-bottom:12px}
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid #edd8d0;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #f2e3de;text-align:left;vertical-align:top}
    th{background:#fff6f2;color:#243042}
    .good{color:#cb1717;font-weight:700}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#fff0eb;color:#c21919;font-weight:700;font-size:.86rem}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    details{border:1px solid #f0ddd5;border-radius:18px;background:#fff;overflow:hidden}
    summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details .answer{padding:0 18px 18px;color:var(--muted)}
    .testimonials,.cases,.articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote{position:relative}
    .quote:before{content:"“";position:absolute;top:8px;right:14px;font-size:3rem;color:rgba(216,32,32,.16);font-family:serif}
    .case-media{border-radius:18px;overflow:hidden;margin-bottom:12px;border:1px solid #f0ddd5;background:#fff}
    .case-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
    .article-list a{display:block;padding:14px 0;border-bottom:1px dashed #efd8d0;color:#283344}
    .article-list a:last-child{border-bottom:0}
    form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:.95rem}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #ddcdc6;background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s}
    textarea{min-height:130px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#ef8f7d;box-shadow:0 0 0 4px rgba(216,32,32,.08)}
    .footer{margin-top:18px;padding:28px 0 34px;background:#1d222c;color:#f5f7fb}
    .footer .container{width:min(var(--container),calc(100% - 32px))}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}
    .footer a{color:#ffd7cf}
    .footer .muted{color:#c7d0de}
    .foot-bottom{margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);color:#d4dbea;font-size:.92rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
    .float{position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px}
    .float a,.float button{width:48px;height:48px;border-radius:50%;border:0;display:grid;place-items:center;box-shadow:0 14px 30px rgba(0,0,0,.15)}
    .float .kefu{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}
    .float .top{background:#fff;color:var(--primary);border:1px solid #ffd7ce}
    .sticky-form{display:grid;gap:14px}
    .hr{height:1px;background:linear-gradient(90deg,transparent,#f0ddd5,transparent);margin:18px 0}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
    .scroll-reveal.visible{opacity:1;transform:none}
    .mobile-menu{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.workflow,.split,.testimonials,.cases,.articles,.footer-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav-links,.nav-actions{display:none}
      .menu-btn{display:inline-grid}
      .mobile-menu{display:none;padding:0 0 16px}
      .mobile-menu.open{display:block}
      .mobile-menu .panel{display:grid;gap:8px;padding:12px 0 0}
      .mobile-menu a{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid #f0ddd5}
      form{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .hero-copy{padding:22px}
      .hero-points{grid-template-columns:1fr}
      h1{font-size:2rem}
      .stat-grid{grid-template-columns:1fr 1fr}
      .container{width:min(var(--container),calc(100% - 24px))}
    }