:root{
      --bg:#fbf7f1;
      --bg2:#fffaf4;
      --card:#ffffff;
      --line:#eadfce;
      --text:#18222f;
      --muted:#596577;
      --brand:#0f6bff;
      --brand2:#ff5b42;
      --accent:#ffcc4d;
      --soft:#eef4ff;
      --shadow:0 16px 40px rgba(33, 52, 72, .08);
      --radius:22px;
    }
    *{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",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(15,107,255,.08), transparent 26%),
        radial-gradient(circle at top right, rgba(255,91,66,.10), transparent 24%),
        linear-gradient(180deg, #fffdf9 0%, var(--bg) 44%, #fff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(1180px, calc(100% - 32px)); margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(255,250,244,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(234,223,206,.72)}
    .nav{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:5px;box-shadow:0 8px 20px rgba(15,107,255,.08)}
    .brand-txt{display:flex;flex-direction:column;line-height:1.15;min-width:0}
    .brand-txt strong{font-size:18px}
    .brand-txt span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px 12px;align-items:center}
    .nav-links a{font-size:14px;color:#253041;padding:8px 10px;border-radius:999px;transition:.22s ease}
    .nav-links a:hover{background:#fff;border-color:var(--line);box-shadow:0 8px 18px rgba(15,107,255,.08);transform:translateY(-1px)}
    .cta-row{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;transition:.22s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#2d8cff);color:#fff;box-shadow:0 16px 30px rgba(15,107,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .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:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:stretch}
    .hero-card,.panel,.section-card,.review-card,.faq-item,.article-card,.timeline-card,.contact-card,.compare-box{
      background:rgba(255,255,255,.88);border:1px solid rgba(234,223,206,.9);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-card{padding:28px;position:relative;overflow:hidden}
    .hero-card::before,.hero-card::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero-card::before{width:180px;height:180px;right:-50px;top:-50px;background:radial-gradient(circle, rgba(255,91,66,.15), transparent 70%)}
    .hero-card::after{width:220px;height:220px;right:90px;bottom:-120px;background:radial-gradient(circle, rgba(15,107,255,.12), transparent 70%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;background:linear-gradient(135deg, rgba(15,107,255,.10), rgba(255,91,66,.10));border:1px solid rgba(15,107,255,.12);border-radius:999px;color:#214b9b;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(32px, 5vw, 56px);line-height:1.08;letter-spacing:-.02em}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);max-width:62ch;margin:0 0 18px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
    .mini-stat{padding:14px 14px 13px;border-radius:18px;background:linear-gradient(180deg,#fff, #fff7ef);border:1px solid rgba(234,223,206,.95)}
    .mini-stat strong{display:block;font-size:20px;color:#102033}
    .mini-stat span{display:block;margin-top:4px;color:var(--muted);font-size:13px;line-height:1.45}
    .hero-side{display:grid;gap:20px}
    .panel{padding:18px}
    .panel h2,.section-title h2{margin:0 0 8px;font-size:26px}
    .panel p,.section-title p{margin:0;color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#223044}
    .section{padding:18px 0}
    .section-title{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px}
    .section-title .hint{color:var(--muted);max-width:60ch;font-size:14px;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .section-card{padding:22px}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg, rgba(15,107,255,.12), rgba(255,91,66,.12));color:#1248a6;font-weight:800;margin-bottom:14px}
    .section-card h3,.review-card h3,.article-card h3,.faq-item summary{margin:0 0 10px;font-size:18px}
    .section-card p,.review-card p,.article-card p,.contact-card p{margin:0;color:var(--muted);line-height:1.75}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .stat{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff, #fdf9f3);border:1px solid var(--line)}
    .stat strong{display:block;font-size:28px;line-height:1;color:#112033}
    .stat span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.5}
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:920px}
    th,td{padding:16px 14px;border-bottom:1px solid #efe6d8;text-align:left;vertical-align:top}
    th{background:#fff7ec;font-size:14px}
    td{color:#2d3a4a;line-height:1.7}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#eef6ff;color:#114ca4;font-size:12px;font-weight:700}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:20px;border-radius:20px;background:linear-gradient(180deg,#fff, #fff8f1);border:1px solid var(--line);position:relative}
    .step b{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:17px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .timeline{display:grid;gap:12px}
    .timeline-card{padding:18px 18px 18px 22px;border-left:5px solid var(--brand)}
    .timeline-card strong{display:block;margin-bottom:6px}
    .reviews,.articles,.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card,.article-card{padding:20px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .stars{color:#ff9f1a;font-size:14px;letter-spacing:1px}
    .compare-box{padding:22px}
    .compare-score{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:14px}
    .big-score{font-size:42px;font-weight:800;color:#102033}
    .faq-item{padding:0;overflow:hidden}
    .faq-item summary{list-style:none;padding:18px 20px;cursor:pointer}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 20px 18px;color:var(--muted);line-height:1.75}
    .contact-wrap{display:grid;grid-template-columns:1fr .95fr;gap:16px}
    .contact-card{padding:22px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;color:#2b394c;font-weight:700}
    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;transition:.2s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(15,107,255,.45);box-shadow:0 0 0 4px rgba(15,107,255,.08)}
    .contact-list{display:grid;gap:12px;margin-top:16px}
    .contact-item{padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .float-bar{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px}
    .float-btn{padding:12px 14px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);font-size:14px;font-weight:700}
    footer{margin-top:18px;background:#132033;color:#edf4ff;border-top:1px solid rgba(255,255,255,.08)}
    .footer-inner{padding:28px 0 24px;display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    .footer-inner a{color:#fff}
    .footer-inner p,.footer-inner li{color:#d5e0ef;line-height:1.7}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.08)}
    .subtle{color:var(--muted);font-size:13px}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.stats,.process,.reviews,.articles,.faq-grid,.contact-wrap,.footer-inner{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .section-title{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .nav.open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:70px;flex-direction:column;align-items:flex-start;padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav{position:relative}
      .form-grid{grid-template-columns:1fr}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:all .55s ease}
    .reveal.visible{opacity:1;transform:none}
    .pulse{animation:pulse 2.8s ease-in-out infinite}
    @keyframes pulse{0%,100%{box-shadow:0 16px 30px rgba(15,107,255,.22)}50%{box-shadow:0 18px 40px rgba(255,91,66,.18)}}