:root {
      --ink: #172133;
      --muted: #657084;
      --paper: #fffaf7;
      --surface: #ffffff;
      --line: #eadfd9;
      --coral: #f26455;
      --orange: #ff9d45;
      --cyan: #1db5ad;
      --blue: #356de8;
      --yellow: #f8d66d;
      --soft-coral: #fff0eb;
      --soft-cyan: #e8faf7;
      --shadow: 0 18px 48px rgba(45, 40, 60, .09);
      --radius: 14px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        radial-gradient(circle at 7% 12%, rgba(255, 157, 69, .13), transparent 25rem),
        radial-gradient(circle at 92% 22%, rgba(29, 181, 173, .10), transparent 25rem),
        var(--paper);
      font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    .container { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255, 250, 247, .92);
      border-bottom: 1px solid rgba(234, 223, 217, .8);
      backdrop-filter: blur(16px);
    }
    .header-inner {
      min-height: 76px; display: flex; align-items: center;
      justify-content: space-between; gap: 22px;
    }
    .brand { display: flex; align-items: center; flex: 0 0 auto; }
    .ai-page-logo { width: 130px; }
    .nav-toggle {
      display: none; border: 1px solid var(--line); background: var(--surface);
      color: var(--ink); border-radius: 8px; padding: 9px 12px; cursor: pointer; font-size: 20px;
    }
    .nav-links {
      display: flex; align-items: center; justify-content: flex-end;
      gap: 0; flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 10px; color: #465167; font-size: 13px; white-space: nowrap;
      transition: color .2s ease, transform .2s ease;
    }
    .nav-links a:hover { color: var(--coral); transform: translateY(-2px); }
    .nav-cta {
      margin-left: 12px; background: var(--coral); color: #fff !important;
      border-radius: 7px; padding: 10px 16px !important; font-weight: 700;
    }
    .hero { padding: 78px 0 64px; overflow: hidden; }
    .hero-grid { display: grid; grid-template-columns: 1.18fr .82fr; gap: 58px; align-items: center; }
    .eyebrow, .section-kicker {
      color: var(--coral); font-size: 13px; font-weight: 800; letter-spacing: 2px;
      text-transform: uppercase;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 { font-size: clamp(38px, 6vw, 72px); line-height: 1.08; letter-spacing: 0; margin: 16px 0 24px; max-width: 700px; }
    h1 span { color: var(--coral); }
    .hero-copy { font-size: 18px; color: var(--muted); max-width: 650px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 30px 0 34px; }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 20px; border-radius: 8px; border: 1px solid transparent;
      font-weight: 700; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .btn:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(242, 100, 85, .2); }
    .btn-primary { background: var(--coral); color: #fff; }
    .btn-secondary { background: #fff; color: var(--ink); border-color: var(--line); }
    .hero-note { font-size: 13px; color: var(--muted); }
    .hero-visual {
      position: relative; padding: 26px; min-height: 350px; border: 1px solid #f2c8b7;
      background: linear-gradient(145deg, #fff 5%, #fff1e9 100%);
      box-shadow: var(--shadow); border-radius: 24px 8px 24px 8px;
    }
    .hero-visual:before {
      content: ""; position: absolute; width: 80px; height: 80px; right: -18px; top: -22px;
      border-radius: 50%; background: var(--yellow); opacity: .85;
    }
    .hero-visual:after {
      content: ""; position: absolute; width: 52px; height: 52px; left: -14px; bottom: 25px;
      background: var(--cyan); transform: rotate(18deg); opacity: .85;
    }
    .signal { position: relative; z-index: 1; border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 20px; }
    .signal strong { display: block; font-size: 32px; line-height: 1.2; }
    .signal small { color: var(--muted); }
    .mini-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .mini-card { background: rgba(255,255,255,.84); padding: 15px; border-left: 4px solid var(--cyan); }
    .mini-card b { display: block; font-size: 22px; }
    .mini-card span { color: var(--muted); font-size: 12px; }
    .section { padding: 86px 0; }
    .section.alt { background: rgba(255,255,255,.62); border-top: 1px solid rgba(234,223,217,.75); border-bottom: 1px solid rgba(234,223,217,.75); }
    .section-head { max-width: 720px; margin-bottom: 38px; }
    h2 { font-size: clamp(28px, 4vw, 46px); line-height: 1.2; margin: 10px 0 15px; }
    h3 { font-size: 20px; line-height: 1.35; margin-bottom: 10px; }
    .lead { color: var(--muted); font-size: 16px; }
    .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 16px; }
    .stat { padding: 24px; background: var(--surface); border-top: 4px solid var(--coral); box-shadow: 0 8px 25px rgba(45,40,60,.05); }
    .stat:nth-child(2) { border-color: var(--cyan); }
    .stat:nth-child(3) { border-color: var(--blue); }
    .stat:nth-child(4) { border-color: var(--orange); }
    .stat strong { display: block; font-size: 34px; color: var(--ink); }
    .stat span { color: var(--muted); font-size: 13px; }
    .about-grid, .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: start; }
    .check-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
    .check-list li { padding-left: 30px; position: relative; }
    .check-list li:before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--coral); font-weight: 800; }
    .accent-panel { background: var(--ink); color: #fff; padding: 32px; border-radius: 8px 28px 8px 28px; }
    .accent-panel p { color: #dbe2ef; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
    .tag { background: var(--soft-coral); color: #a84739; padding: 5px 11px; border-radius: 4px; font-size: 13px; }
    .tag:nth-child(3n) { background: var(--soft-cyan); color: #187c78; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-card { background: var(--surface); border: 1px solid var(--line); padding: 24px; transition: transform .25s ease, box-shadow .25s ease; }
    .service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
    .service-icon { width: 42px; height: 42px; display: grid; place-items: center; background: var(--soft-coral); color: var(--coral); font-size: 21px; margin-bottom: 20px; border-radius: 10px 3px 10px 3px; }
    .service-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .wide-service { grid-column: span 2; background: linear-gradient(120deg, #fff4e7, #fff); }
    .steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 1px solid var(--line); }
    .step { padding: 25px 18px 10px 0; border-right: 1px solid var(--line); margin-right: 18px; }
    .step:last-child { border-right: 0; }
    .step-num { color: var(--coral); font-size: 28px; font-weight: 800; }
    .step p { color: var(--muted); font-size: 14px; }
    .solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .solution { padding: 24px; background: #fff; border-left: 5px solid var(--cyan); }
    .solution:nth-child(2) { border-color: var(--orange); }
    .solution:nth-child(3) { border-color: var(--blue); }
    .solution:nth-child(4) { border-color: var(--coral); }
    .solution p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .network { display: grid; grid-template-columns: .8fr 1.2fr; gap: 32px; align-items: center; }
    .network-list { display: flex; flex-wrap: wrap; gap: 10px; }
    .network-list span { padding: 10px 14px; background: #fff; border: 1px solid var(--line); color: #39465a; font-size: 13px; }
    .timeline { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
    .timeline-item { padding: 22px; background: var(--soft-cyan); border-bottom: 4px solid var(--cyan); }
    .timeline-item:nth-child(even) { background: var(--soft-coral); border-color: var(--coral); }
    .timeline-item b { display: block; margin-bottom: 8px; }
    .timeline-item p { color: var(--muted); font-size: 14px; margin: 0; }
    .review-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 25px; align-items: stretch; }
    .score-box { background: var(--coral); color: #fff; padding: 30px; display: flex; flex-direction: column; justify-content: center; }
    .score-box strong { font-size: 68px; line-height: 1; }
    .stars { color: var(--yellow); letter-spacing: 3px; font-size: 22px; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 700px; border-collapse: collapse; font-size: 14px; }
    th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; }
    th { background: #fff1eb; color: #873d34; }
    td:first-child { font-weight: 700; }
    .highlight { color: var(--coral); font-weight: 700; }
    .price-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .price { padding: 27px; background: #fff; border: 1px solid var(--line); }
    .price.featured { border: 2px solid var(--coral); position: relative; }
    .price.featured:before { content: "推荐参考"; position: absolute; right: 18px; top: 18px; color: var(--coral); font-size: 12px; font-weight: 700; }
    .price strong { display: block; font-size: 32px; margin: 16px 0 4px; }
    .price p { color: var(--muted); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .case-card { background: #fff; border: 1px solid var(--line); overflow: hidden; }
    .case-image { aspect-ratio: 16/9; overflow: hidden; background: #f6eee8; }
    .case-image img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 19px; }
    .case-body p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .review { background: #fff; padding: 22px; border: 1px solid var(--line); }
    .review p { color: #4e5a6c; font-size: 14px; }
    .review footer { color: var(--coral); font-size: 13px; font-weight: 700; }
    .article-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .article { padding: 22px; background: #fff; border-top: 3px solid var(--cyan); }
    .article a { font-weight: 700; }
    .article p { color: var(--muted); font-size: 14px; margin: 8px 0 0; }
    .faq-list { display: grid; gap: 10px; max-width: 900px; }
    details { background: #fff; border: 1px solid var(--line); padding: 17px 20px; }
    summary { cursor: pointer; font-weight: 700; padding-right: 20px; }
    details p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
    .form-box { background: #fff; padding: 30px; border: 1px solid var(--line); box-shadow: var(--shadow); }
    .form-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
    label { display: grid; gap: 7px; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; border: 1px solid #ddcec7; padding: 12px 13px; font: inherit; color: var(--ink); background: #fffdfb; border-radius: 5px; }
    textarea { min-height: 130px; resize: vertical; }
    .full { grid-column: 1/-1; }
    .contact-info { padding: 12px 0; }
    .contact-item { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .contact-item b { display: block; margin-bottom: 4px; }
    .contact-item span, .contact-item a { color: var(--muted); font-size: 14px; }
    .qr { width: 130px; margin-top: 8px; }
    .footer { background: #172133; color: #dfe7f2; padding: 46px 0 22px; }
    .footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; }
    .footer h3 { color: #fff; font-size: 17px; }
    .footer p, .footer a { color: #b7c3d4; font-size: 13px; }
    .footer-links { display: grid; gap: 7px; }
    .footer-bottom { border-top: 1px solid #334156; margin-top: 30px; padding-top: 18px; color: #9eabbc; font-size: 12px; }
    .float-contact, .top-button {
      position: fixed; right: 20px; z-index: 10; border: 0; cursor: pointer;
      box-shadow: 0 10px 25px rgba(24,31,48,.2);
    }
    .float-contact { bottom: 78px; background: var(--coral); color: #fff; padding: 13px 15px; border-radius: 50px; font-weight: 700; }
    .top-button { bottom: 20px; width: 40px; height: 40px; border-radius: 50%; background: #fff; color: var(--ink); display: none; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-toggle { display: block; }
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 12px 18px 18px; background: var(--paper); border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2,1fr); }
      .nav-links a { padding: 10px; }
      .nav-cta { margin-left: 0; text-align: center; }
      .hero-grid, .about-grid, .contact-grid, .network, .review-layout { grid-template-columns: 1fr; }
      .stats { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .wide-service { grid-column: span 1; }
      .steps { grid-template-columns: repeat(3,1fr); gap: 15px; }
      .step { border-right: 0; margin-right: 0; }
    }
    @media (max-width: 640px) {
      .container { width: min(100% - 28px, 1180px); }
      .hero { padding-top: 55px; }
      .hero-visual { min-height: auto; }
      .stats, .service-grid, .solution-grid, .timeline, .price-grid, .case-grid, .reviews, .article-grid, .footer-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      h1 { font-size: 42px; }
      .section { padding: 62px 0; }
      .float-contact { right: 14px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
      .reveal { opacity: 1; transform: none; }
    }