:root {
      color-scheme: light;
      --ink: #26252d;
      --muted: #696773;
      --paper: #fff9f5;
      --surface: #ffffff;
      --line: #eee5e1;
      --coral: #ef4f61;
      --orange: #ff8a45;
      --teal: #117b77;
      --plum: #633e76;
      --shadow: 0 14px 38px rgba(66, 42, 56, .08);
      --content: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--content), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255, 249, 245, .94);
      border-bottom: 1px solid rgba(238, 229, 225, .9);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
    .ai-page-logo { display: block; width: 142px; max-height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #4e4a52; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--coral); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 0; border-radius: 5px; padding: 12px 19px; color: #fff; background: var(--coral);
      font-weight: 700; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta { flex: 0 0 auto; padding: 10px 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 9px 20px rgba(239, 79, 97, .22); background: #dc3f52; }
    .button.secondary { background: #fff; color: var(--ink); border: 1px solid var(--line); }
    .button.secondary:hover { background: #fff3ee; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 5px; }
    .menu-toggle span { display: block; width: 18px; height: 2px; background: currentColor; margin: 4px auto; }
    .hero {
      overflow: hidden; position: relative; padding: 76px 0 56px;
      background: linear-gradient(115deg, #fff4ee 0%, #fff9f5 49%, #f3fffa 100%);
      border-bottom: 1px solid var(--line);
    }
    .hero::before {
      content: ""; position: absolute; width: 310px; height: 310px; right: 7%; top: 42px;
      border: 1px solid rgba(239, 79, 97, .2); border-radius: 50%;
      box-shadow: 0 0 0 34px rgba(239,79,97,.035), 0 0 0 70px rgba(17,123,119,.035);
      animation: orbit 18s linear infinite;
    }
    .hero::after {
      content: ""; position: absolute; width: 118px; height: 118px; right: 15%; top: 126px;
      border: 1px solid rgba(17,123,119,.35); transform: rotate(35deg);
    }
    @keyframes orbit { to { transform: rotate(360deg); } }
    .hero-inner { position: relative; z-index: 1; max-width: 790px; }
    .eyebrow { color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 700px; margin: 13px 0 17px; font-size: clamp(38px, 7vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; color: #56525b; font-size: 17px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 25px; }
    .hero-notes { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 24px; color: #5a565f; font-size: 13px; }
    .hero-notes span::before { content: "✳"; color: var(--coral); margin-right: 7px; }
    .quick-stats { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 48px; border-top: 1px solid #eadbd6; }
    .stat { padding: 20px 18px 0 0; }
    .stat strong { display: block; font-size: 18px; }
    .stat span { color: var(--muted); font-size: 12px; }
    .section { padding: 68px 0; }
    .section.alt { background: #fff; }
    .section.tint { background: #f4fbf8; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 28px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { color: var(--coral); font-size: 12px; font-weight: 800; }
    h2 { margin: 6px 0 8px; font-size: clamp(27px, 4vw, 38px); line-height: 1.2; letter-spacing: 0; }
    h3 { margin: 0 0 9px; font-size: 18px; line-height: 1.35; letter-spacing: 0; }
    .section-head p, .muted { margin: 0; color: var(--muted); }
    .text-link { color: var(--teal); font-weight: 700; white-space: nowrap; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 45px; align-items: center; }
    .intro-copy p { color: var(--muted); }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; padding: 0; list-style: none; }
    .capability-list li { padding: 11px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .capability-list li::before { content: "↗"; display: inline-block; color: var(--coral); margin-right: 9px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { padding: 21px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--teal); transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:nth-child(3n+2) { border-top-color: var(--coral); }
    .service-item:nth-child(3n) { border-top-color: var(--orange); }
    .service-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .tagline { display: block; margin-bottom: 8px; color: var(--teal); font-size: 11px; font-weight: 800; }
    .platform-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .platform-tags span { padding: 6px 10px; color: #494650; background: #fff; border: 1px solid #eadfdc; border-radius: 3px; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 0 22px 0 0; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 14px; color: var(--coral); font-size: 26px; font-weight: 800; }
    .workflow article:not(:last-child)::after { content: ""; position: absolute; top: 17px; left: 54px; right: 18px; border-top: 1px dashed #d8bdb8; }
    .workflow p { color: var(--muted); font-size: 14px; }
    .industries { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
    .industry-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
    .industry-list div { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .industry-list strong { display: block; font-size: 14px; }
    .industry-list span { color: var(--muted); font-size: 12px; }
    .network-panel { padding: 26px; background: #fff4ee; border-left: 4px solid var(--orange); }
    .network-panel p { color: var(--muted); }
    .network-items { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; color: #494650; font-size: 13px; }
    .network-items span::before { content: "•"; color: var(--coral); margin-right: 8px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #fff1ec; color: #39343c; font-size: 13px; }
    td { color: #56525b; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .rating { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; margin-bottom: 21px; padding: 19px 22px; color: #fff; background: var(--plum); }
    .rating strong { font-size: 27px; }
    .rating span { color: #fff3c9; }
    .match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: start; }
    .match-points { padding: 0; list-style: none; }
    .match-points li { padding: 12px 0; border-bottom: 1px solid var(--line); color: #55515a; }
    .match-points li strong { color: var(--ink); }
    .form-panel { padding: 24px; background: #fff; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #ddd5d2; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 108px; resize: vertical; }
    .form-submit { margin-top: 15px; }
    .showcase-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: start; }
    .showcase-main, .showcase-side { background: #fff; border: 1px solid var(--line); }
    .image-frame { padding: 12px; background: #f4efec; }
    .image-frame img { display: block; width: 100%; height: auto; object-fit: contain; }
    .showcase-caption { padding: 17px 19px; }
    .showcase-caption p { margin: 0; color: var(--muted); font-size: 14px; }
    .showcase-side .image-frame + .showcase-caption { border-bottom: 1px solid var(--line); }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
    .review { padding: 19px; background: #fff; border: 1px solid var(--line); }
    .review blockquote { margin: 0 0 14px; color: #504b55; font-size: 14px; }
    .review cite { color: var(--teal); font-size: 12px; font-style: normal; font-weight: 700; }
    .disclaimer { margin: 14px 0 0; color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 17px 36px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 5px; top: 13px; color: var(--coral); font-size: 22px; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: 0 36px 17px 0; color: var(--muted); font-size: 14px; }
    .article-links, .friend-links { display: flex; flex-wrap: wrap; gap: 10px 20px; }
    .article-links a, .friend-links a { color: var(--teal); font-size: 14px; text-decoration: underline; text-decoration-color: #b8d8d3; text-underline-offset: 4px; }
    .contact-band { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 25px 0; border-top: 1px solid var(--line); }
    .contact-band p { margin: 5px 0 0; color: var(--muted); }
    .contact-details { display: flex; flex-wrap: wrap; gap: 9px 18px; color: #4c4852; font-size: 13px; }
    .qr { width: 116px; padding: 8px; background: #fff; border: 1px solid var(--line); }
    .qr img { display: block; width: 100%; height: auto; }
    footer { padding: 22px 0; color: #4a4650; background: #f0e9e6; border-top: 1px solid #e4d9d4; }
    .footer-row { display: flex; justify-content: space-between; align-items: center; gap: 18px; }
    .footer-row p { margin: 0; font-size: 12px; }
    .home-link { color: var(--teal); font-weight: 700; }
    .floating-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: inline-flex; align-items: center; gap: 8px; padding: 12px 15px; color: #fff; background: var(--teal); border-radius: 4px; box-shadow: var(--shadow); font-size: 13px; font-weight: 700; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (max-width: 980px) {
      .menu-toggle { display: block; margin-left: auto; }
      .nav-row { flex-wrap: wrap; padding-block: 10px; gap: 12px; }
      .nav-links { display: none; width: 100%; justify-content: flex-start; padding: 4px 0 8px; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 10px 8px 0; }
      .nav-cta { margin-left: 0; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--content), calc(100% - 30px)); }
      .hero { padding: 54px 0 36px; }
      .hero::before { right: -150px; top: 95px; width: 260px; height: 260px; }
      .hero::after { right: 34px; top: 172px; }
      .hero-inner { max-width: 100%; }
      .hero-copy { font-size: 15px; }
      .quick-stats { grid-template-columns: 1fr 1fr; margin-top: 34px; }
      .stat { padding: 14px 10px 10px 0; border-bottom: 1px solid #eadbd6; }
      .section { padding: 49px 0; }
      .section-head { display: block; }
      .section-head .text-link { display: inline-block; margin-top: 12px; }
      .intro-grid, .industries, .match-grid, .showcase-grid { grid-template-columns: 1fr; gap: 22px; }
      .capability-list { gap: 4px 14px; }
      .service-grid, .review-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 25px 14px; }
      .workflow article:not(:last-child)::after { display: none; }
      .industry-list { gap: 0 14px; }
      .network-items { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .contact-band { grid-template-columns: 1fr auto; }
      .contact-details { grid-column: 1 / -1; }
      .footer-row { align-items: flex-start; flex-direction: column; }
      .floating-contact { right: 12px; bottom: 12px; }
      .floating-contact span { display: none; }
      .floating-contact::after { content: "客服"; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }