:root{
      --bg:#f7f6f2;
      --panel:#ffffff;
      --panel2:#fff7ef;
      --text:#142033;
      --muted:#5d6a7f;
      --line:#e7e2d8;
      --brand:#2f6bff;
      --brand2:#ff5c7a;
      --accent:#ffb72c;
      --accent2:#18b8a7;
      --shadow:0 18px 50px rgba(20,32,51,.08);
      --radius:20px;
      --radius2:28px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(255,92,122,.12), transparent 24%),
        linear-gradient(180deg,#fff 0%, #fbf8f4 48%, #f7f6f2 100%);
    }
    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:40;background:rgba(247,246,242,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(231,226,216,.75)}
    .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:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 22px rgba(20,32,51,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.2}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px}
    .nav-links a:hover,.nav-links a:focus-visible{background:rgba(47,107,255,.10);color:var(--brand);outline:none}
    .nav-actions{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 16px;font-weight:700;transition:.25s ease;cursor:pointer;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#8b5cf6);color:#fff;box-shadow:0 14px 30px rgba(47,107,255,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 34px rgba(47,107,255,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px;color:var(--text)}
    main{display:block}
    .hero{padding:46px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch}
    .hero-copy{background:linear-gradient(135deg, rgba(255,255,255,.95), rgba(255,247,239,.92));border:1px solid rgba(231,226,216,.9);border-radius:var(--radius2);padding:34px;box-shadow:var(--shadow);position:relative;overflow:hidden}
    .hero-copy:before{content:"";position:absolute;inset:auto -40px -60px auto;width:180px;height:180px;background:radial-gradient(circle, rgba(255,92,122,.22), transparent 68%);border-radius:50%}
    .hero-copy:after{content:"";position:absolute;left:-60px;top:-40px;width:180px;height:180px;background:radial-gradient(circle, rgba(47,107,255,.16), transparent 66%);border-radius:50%}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(47,107,255,.10);color:var(--brand);font-weight:700;font-size:13px;position:relative;z-index:1}
    h1{font-size:clamp(32px,4vw,54px);line-height:1.08;margin:16px 0 14px;position:relative;z-index:1}
    .hero-copy p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;position:relative;z-index:1;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;position:relative;z-index:1}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;position:relative;z-index:1}
    .chip{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text)}
    .hero-side{display:grid;gap:16px}
    .mini-card,.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .mini-card{padding:20px}
    .mini-card h3,.section-title h2{margin:0 0 10px}
    .mini-card p,.section-title p{margin:0;color:var(--muted);line-height:1.75}
    .metrics{padding:18px 0 8px}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .metric{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #fff8f2);border:1px solid var(--line);box-shadow:0 12px 28px rgba(20,32,51,.05)}
    .metric strong{display:block;font-size:28px;line-height:1.1;margin-bottom:8px}
    .metric span{color:var(--muted);font-size:14px;line-height:1.5}
    section{padding:26px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
    .section-title h2{font-size:28px}
    .section-title .tagline{color:var(--muted);max-width:60ch}
    .card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .feature-card{padding:22px;border-radius:22px;background:linear-gradient(180deg,#fff, #fffaf5);border:1px solid var(--line);box-shadow:var(--shadow);transition:.25s ease}
    .feature-card:hover{transform:translateY(-4px)}
    .feature-card h3{margin:12px 0 10px;font-size:18px}
    .feature-card p,.feature-card li{color:var(--muted);line-height:1.7}
    .feature-card ul{margin:0;padding-left:18px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .panel{padding:24px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:rgba(47,107,255,.10);color:var(--brand);font-weight:800;margin-bottom:12px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#fff8f1;font-size:14px}
    td{color:var(--text)}
    td small{color:var(--muted)}
    .rating{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .score-box{padding:24px;border-radius:24px;background:linear-gradient(135deg,#fff, #fff5f8);border:1px solid rgba(255,92,122,.18)}
    .stars{font-size:20px;color:#ff9d00;letter-spacing:2px}
    .badge-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .badge{padding:8px 12px;border-radius:999px;background:rgba(24,184,167,.10);color:#0b7b71;font-size:13px}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text);font-size:13px}
    .articles,.reviews,.faq-list{display:grid;gap:14px}
    .article-item,.review-card{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 28px rgba(20,32,51,.05)}
    .article-item h3,.review-card h3{margin:0 0 10px;font-size:17px}
    .article-item p,.review-card p{margin:0;color:var(--muted);line-height:1.75}
    .review-meta{margin-top:14px;font-size:13px;color:var(--brand);font-weight:700}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:0 12px 28px rgba(20,32,51,.04)}
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    details p{margin:12px 0 0;color:var(--muted);line-height:1.75}
    .form-grid{display:grid;grid-template-columns:1fr 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 var(--line);border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,107,255,.12)}
    .form-wide{grid-column:1/-1}
    .submit-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:4px}
    .help-box{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .contact-card{padding:22px;border-radius:22px;background:linear-gradient(180deg,#fff,#fff9f5);border:1px solid var(--line)}
    .contact-card .ai-page-image{border-radius:18px;box-shadow:0 14px 30px rgba(20,32,51,.12)}
    footer{margin-top:18px;background:#172133;color:#eef3ff}
    footer .container{padding:30px 0}
    footer a{color:#d7e3ff}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer-grid p,.footer-grid li{color:#c8d3ea;line-height:1.75}
    .footer-grid ul{padding-left:18px;margin:8px 0 0}
    .footer-brand{display:flex;align-items:center;gap:12px}
    .footer-brand img{width:42px;height:42px;border-radius:12px;background:#fff}
    .subfooter{margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#c8d3ea;font-size:13px}
    .floating{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:999px;background:var(--brand2);color:#fff;box-shadow:0 16px 34px rgba(255,92,122,.28);font-weight:700}
    .float-btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .mobile-toggle{display:none}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .scroll-reveal.is-visible{opacity:1;transform:none}
    .home-link{font-weight:700;color:var(--brand)}
    .service-map{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .service-map .tag{background:#fff8ef}
    @media (max-width: 1024px){
      .hero-grid,.split,.rating,.help-box,.footer-grid,.service-map,.card-grid,.metric-grid,.steps{grid-template-columns:1fr 1fr}
      .card-grid{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .menu-btn,.mobile-toggle{display:inline-flex}
      .nav{position:relative}
      .nav-links{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);margin-top:10px}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .nav-actions{margin-left:auto}
      .hero{padding-top:24px}
      .hero-grid,.split,.rating,.help-box,.footer-grid,.service-map,.card-grid,.metric-grid,.steps,.form-grid{grid-template-columns:1fr}
      .section-title{flex-direction:column;align-items:flex-start}
      .hero-copy{padding:24px}
      .panel{padding:20px}
      h1{font-size:30px}
      .floating{right:12px;bottom:12px}
    }