:root{
      --bg:#f7f4ef;
      --bg-soft:#fffaf3;
      --card:#ffffff;
      --text:#1f2a37;
      --muted:#5b6574;
      --line:#e8dfd1;
      --brand:#ff4d6d;
      --brand-2:#ffb703;
      --brand-3:#3a86ff;
      --shadow:0 18px 45px rgba(45, 54, 75, .10);
      --shadow-soft:0 10px 25px rgba(45, 54, 75, .08);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(58,134,255,.12), transparent 30%),
        radial-gradient(circle at top right, rgba(255,77,109,.10), transparent 25%),
        linear-gradient(180deg, #fff 0%, var(--bg) 28%, #fbf8f2 100%);
      line-height:1.65;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .skip{position:absolute;left:-999px;top:auto}
    .skip:focus{left:16px;top:16px;z-index:9999;background:#fff;padding:10px 14px;border-radius:999px;box-shadow:var(--shadow)}
    header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:saturate(160%) blur(12px);
      background:rgba(247,244,239,.82);
      border-bottom:1px solid rgba(232,223,209,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;font-weight:800}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand strong{font-size:1.05rem;letter-spacing:.5px}
    .brand span{display:block;font-size:.78rem;color:var(--muted);font-weight:600}
    .nav-links{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}
    .nav-links a{padding:9px 12px;border-radius:999px;color:var(--text);font-size:.92rem;transition:.25s ease}
    .nav-links a:hover{background:#fff;box-shadow:var(--shadow-soft);transform:translateY(-1px)}
    .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:1px solid transparent;border-radius:999px;
      font-weight:700;transition:.25s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff;box-shadow:0 12px 28px rgba(255,77,109,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,77,109,.28)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-secondary:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    main{display:block}
    .hero{
      padding:52px 0 28px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;
    }
    .hero-copy,.hero-panel,.section-card,.feature-card,.review-card,.faq-item,.article-card,.price-card,.timeline-card,.form-card,.compare-card,.case-card{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(232,223,209,.92);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px 30px;position:relative;overflow:hidden}
    .hero-copy:before{
      content:"";position:absolute;inset:auto -60px -70px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(255,183,3,.28), transparent 62%);
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(58,134,255,.10);color:#1d4ed8;font-weight:700;font-size:.88rem}
    h1{margin:16px 0 14px;font-size:clamp(2rem, 4vw, 3.5rem);line-height:1.12;letter-spacing:-.02em}
    .lead{margin:0;color:var(--muted);font-size:1.03rem;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff7ef);border:1px solid #f0e4d4}
    .metric strong{display:block;font-size:1.35rem;color:#0f172a}
    .metric span{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}
    .hero-panel{padding:22px}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px}
    .tag{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.88rem;color:#334155}
    .panel-block{padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(255,77,109,.08), rgba(58,134,255,.08));border:1px solid rgba(58,134,255,.15);margin-bottom:14px}
    .panel-block h3{margin:0 0 8px;font-size:1.04rem}
    .panel-block p{margin:0;color:var(--muted)}
    .panel-list{display:grid;gap:10px;margin:14px 0 0;padding:0;list-style:none}
    .panel-list li{display:flex;gap:10px;align-items:flex-start;color:#334155}
    .panel-list li:before{content:"";width:10px;height:10px;border-radius:50%;margin-top:.55em;background:linear-gradient(135deg,var(--brand),var(--brand-3));flex:0 0 auto}
    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:1.7rem;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:56ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .feature-card,.case-card,.review-card,.article-card,.price-card,.timeline-card,.compare-card,.form-card{padding:22px}
    .feature-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3,.timeline-card h3,.compare-card h3{margin:0 0 10px;font-size:1.08rem}
    .feature-card p,.case-card p,.review-card p,.article-card p,.price-card p,.timeline-card p,.compare-card p{margin:0;color:var(--muted)}
    .icon{
      width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg, rgba(255,77,109,.12), rgba(255,183,3,.12));
      color:#c026d3;font-weight:900;
    }
    .pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .pill{padding:7px 10px;border-radius:999px;background:#f9fafb;border:1px solid #eef2f7;font-size:.85rem;color:#334155}
    .section-card{padding:24px}
    .section-card .content{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:start}
    .content ul{margin:10px 0 0 18px;color:#334155}
    .content li{margin-bottom:8px}
    .media-stack{display:grid;gap:14px}
    .media-stack img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow-soft)}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:780px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #efe7db;vertical-align:top}
    th{background:#fff7ee;font-size:.95rem}
    td{color:#334155}
    .score{font-size:1.2rem;font-weight:800;color:#0f172a}
    .rating{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:10px}
    .stars{color:#f59e0b;font-size:1.15rem;letter-spacing:2px}
    .steps{counter-reset:step}
    .step{
      position:relative;padding:22px 18px 18px 22px;
      background:linear-gradient(180deg,#fff, #fffaf4);border:1px solid var(--line);border-radius:18px;
    }
    .step:before{
      counter-increment:step;content:counter(step, decimal-leading-zero);
      display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;
      background:linear-gradient(135deg,var(--brand-3),var(--brand));color:#fff;font-weight:800;margin-bottom:14px;
    }
    .step h3{margin:0 0 10px}
    .compare-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .compare-card ul{margin:12px 0 0 18px;color:#334155}
    .compare-card li{margin-bottom:8px}
    .bad{color:#b91c1c;font-weight:700}
    .good{color:#047857;font-weight:700}
    details{
      border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden;
    }
    summary{
      list-style:none;cursor:pointer;padding:18px 18px;font-weight:700;display:flex;justify-content:space-between;gap:12px;
    }
    summary::-webkit-details-marker{display:none}
    details .ans{padding:0 18px 18px;color:#475569}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card .role{display:inline-flex;margin-bottom:12px;color:#1d4ed8;background:rgba(58,134,255,.10);padding:6px 10px;border-radius:999px;font-size:.85rem}
    .article-card .meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
    .meta span{font-size:.84rem;padding:6px 10px;border-radius:999px;background:#f8fafc;border:1px solid #e5e7eb;color:#475569}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .price-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-card .price{font-size:2rem;font-weight:900;margin:10px 0;color:#0f172a}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    label{display:block;font-weight:700;margin-bottom:8px}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid #d9e0ea;background:#fff;color:var(--text);
      outline:none;transition:.2s ease;font:inherit;
    }
    textarea{min-height:132px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#f59e0b;box-shadow:0 0 0 4px rgba(245,158,11,.12)}
    .full{grid-column:1/-1}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
    footer{
      margin-top:18px;padding:28px 0 24px;border-top:1px solid var(--line);
      background:#fffaf3;color:#243042
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer-grid h3{margin:0 0 12px}
    .footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .footer-links a,.article-list a{color:#1f2937}
    .footer-links a:hover,.article-list a:hover{text-decoration:underline}
    .copyright{margin-top:18px;padding-top:16px;border-top:1px solid #efe1cf;color:#607083;font-size:.92rem}
    .float-bar{
      position:fixed;right:16px;bottom:16px;z-index:70;display:grid;gap:10px;
    }
    .float-bar a,.float-bar button{
      width:48px;height:48px;border-radius:50%;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),#ff8a5b);color:#fff;box-shadow:var(--shadow);cursor:pointer;
    }
    .float-bar a:hover,.float-bar button:hover{transform:translateY(-2px)}
    .floating-contact{
      position:fixed;left:16px;bottom:16px;z-index:70;max-width:260px;
      background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:14px;
    }
    .floating-contact .qrcode{margin-top:10px;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
    .mobile-only{display:none}
    .article-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .article-list li{padding:12px 0;border-bottom:1px dashed #eadfcd}
    .article-list li:last-child{border-bottom:none}
    .fade-in{opacity:0;transform:translateY(16px);transition:.6s ease}
    .fade-in.show{opacity:1;transform:none}
    .anchor-space{scroll-margin-top:92px}
    @media (max-width: 1024px){
      .hero-grid,.section-card .content,.compare-grid,.footer-grid,.grid-4,.grid-3,.price-list,.timeline,.testimonials,.faq-grid,.grid-2,.form-grid{grid-template-columns:1fr}
      .hero-metrics{grid-template-columns:repeat(3,1fr)}
      .nav-links{display:none}
      .menu-btn{display:inline-grid}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:74px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start
      }
      .nav{position:relative}
      .nav-cta .btn-secondary{display:none}
      .floating-contact{display:none}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 20px))}
      .hero{padding-top:28px}
      .hero-copy{padding:24px}
      .hero-metrics{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav-cta{gap:8px}
      .btn{padding:11px 15px}
      .hero-actions{width:100%}
      .hero-actions .btn{flex:1}
      .footer-links{grid-template-columns:1fr}
    }