:root {
      color-scheme: light;
      --ink: #19243a;
      --muted: #59677d;
      --paper: #f6f8fc;
      --white: #fff;
      --line: #dfe6ef;
      --blue: #245ce8;
      --cyan: #13a6b8;
      --coral: #ef6a51;
      --lime: #c7e84b;
      --navy: #172842;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        linear-gradient(180deg, #f6f8fc 0%, #f2f7fb 45%, #f7f8fa 100%);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; z-index: 20; top: 0; background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(223,230,239,.9); backdrop-filter: blur(12px); }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 40px; max-width: 100%; height: auto; }
    .brand-name { font-size: 17px; }
    .nav-area { display: flex; align-items: center; gap: 18px; }
    .nav-links { display: flex; align-items: center; gap: 0; padding: 0; margin: 0; list-style: none; }
    .nav-links a { display: block; padding: 10px 9px; color: #40506a; font-size: 13px; white-space: nowrap; border-radius: 6px; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--blue); background: #edf3ff; }
    .header-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 6px; padding: 11px 17px; color: #fff; background: var(--blue); font-weight: 750; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .header-cta { padding: 10px 15px; white-space: nowrap; font-size: 13px; }
    .header-cta:hover, .button:hover { background: #194dcc; box-shadow: 0 8px 20px rgba(36,92,232,.22); transform: translateY(-2px); }
    .menu-toggle { display: none; width: 42px; height: 42px; padding: 0; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: #fff; cursor: pointer; }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after { display: block; width: 18px; height: 2px; background: currentColor; }
    .menu-toggle span { position: relative; }
    .menu-toggle span::before, .menu-toggle span::after { position: absolute; content: ""; left: 0; }
    .menu-toggle span::before { top: -6px; }
    .menu-toggle span::after { top: 6px; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 58px; background: linear-gradient(118deg, #e7f0ff 0%, #f2f8ff 49%, #e9fbf7 100%); border-bottom: 1px solid #dce8f2; }
    .hero::before { position: absolute; right: max(calc((100vw - var(--container)) / 2), 20px); top: 36px; width: 112px; aspect-ratio: 1; border: 1px solid rgba(36,92,232,.16); border-radius: 50%; content: ""; box-shadow: 0 0 0 18px rgba(36,92,232,.035), 0 0 0 38px rgba(19,166,184,.035); animation: orbit 12s linear infinite; }
    .hero::after { position: absolute; right: 14%; bottom: 12%; width: 9px; height: 9px; background: var(--coral); border-radius: 50%; content: ""; box-shadow: 0 0 0 9px rgba(239,106,81,.12); }
    .hero-content { position: relative; z-index: 1; max-width: 780px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: #2456bf; font-size: 13px; font-weight: 800; }
    .eyebrow::before { width: 22px; height: 3px; background: var(--coral); content: ""; }
    h1 { max-width: 760px; margin: 17px 0 15px; font-size: clamp(38px, 6vw, 66px); line-height: 1.1; }
    .hero p { max-width: 650px; margin: 0; color: #475873; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .button-secondary { color: var(--ink); background: #fff; border: 1px solid #cbd8eb; }
    .button-secondary:hover { color: var(--blue); background: #f8fbff; }
    .hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
    .hero-tags span { padding: 5px 10px; color: #355171; background: rgba(255,255,255,.72); border: 1px solid #d5e2ef; border-radius: 4px; font-size: 12px; }
    .band { padding: 58px 0; }
    .band-white { background: rgba(255,255,255,.75); border-block: 1px solid #e7edf4; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 26px; }
    .section-heading h2 { margin: 5px 0 0; font-size: clamp(25px, 3vw, 36px); line-height: 1.2; }
    .section-heading p { max-width: 560px; margin: 0; color: var(--muted); }
    .kicker { color: #245ce8; font-size: 12px; font-weight: 850; text-transform: uppercase; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: -1px; background: #dfe7f0; border: 1px solid #dfe7f0; }
    .metric { padding: 20px 22px; background: #fff; }
    .metric strong { display: block; color: #1e4fc2; font-size: 24px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: start; }
    .intro-copy { max-width: 600px; }
    .intro-copy p { color: var(--muted); }
    .check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; padding: 0; margin: 22px 0 0; list-style: none; }
    .check-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }
    .check-list li::before { flex: 0 0 18px; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%; background: #dff5ed; color: #12825b; content: "✓"; text-align: center; font-size: 12px; font-weight: 800; line-height: 18px; }
    .model-panel { padding: 23px; background: #172842; color: #fff; border-radius: 8px; }
    .model-panel h3 { margin: 0 0 7px; font-size: 18px; }
    .model-panel p { margin: 0; color: #c9d5e5; font-size: 13px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .model-cloud span { padding: 5px 9px; border: 1px solid #53637a; border-radius: 4px; color: #f3f6fb; font-size: 12px; }
    .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service { min-height: 170px; padding: 19px; border: 1px solid var(--line); border-top: 3px solid var(--accent, var(--blue)); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .service:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(33,57,93,.1); }
    .service h3 { margin: 8px 0 7px; font-size: 17px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-mark { color: var(--accent, var(--blue)); font-size: 12px; font-weight: 850; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: steps; }
    .step { position: relative; padding: 18px 20px 15px 0; border-top: 2px solid #bdcde0; counter-increment: steps; }
    .step::before { display: block; width: 30px; height: 30px; margin-top: -34px; margin-bottom: 13px; border: 4px solid #f6f8fc; border-radius: 50%; background: var(--cyan); color: white; content: counter(steps); text-align: center; font-size: 12px; font-weight: 800; line-height: 22px; }
    .step h3 { margin: 0 0 5px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industries { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
    .industry-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .industry-list span { padding: 12px 14px; border-left: 3px solid var(--cyan); background: #fff; color: #34455d; font-size: 14px; }
    .price-note { padding: 23px; border: 1px solid #cfdeee; background: #edf4ff; }
    .price-note h3 { margin: 0 0 8px; }
    .price-note p { margin: 0; color: var(--muted); font-size: 14px; }
    .price-note a { display: inline-block; margin-top: 14px; color: #1d50c4; font-weight: 750; }
    .visual-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 14px; align-items: start; }
    .visual-item { padding: 10px; background: #fff; border: 1px solid var(--line); }
    .visual-item img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #eef2f6; }
    .visual-item.square img { aspect-ratio: 1; }
    .visual-item figcaption { padding: 9px 3px 2px; color: #40516b; font-size: 13px; }
    .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; color: #40516b; font-size: 14px; }
    .review footer { margin-top: 15px; color: #24344d; font-size: 13px; font-weight: 750; }
    .review footer span { display: block; color: #77849a; font-weight: 500; }
    .rating-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: start; }
    .rating-summary { padding: 22px; color: #fff; background: var(--navy); }
    .rating-summary h3 { margin: 0 0 10px; font-size: 17px; }
    .score { color: var(--lime); font-size: 42px; font-weight: 850; line-height: 1; }
    .stars { margin: 9px 0; color: var(--lime); font-size: 20px; }
    .rating-summary p { margin: 0; color: #d2dce8; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 620px; text-align: left; }
    th, td { padding: 12px 14px; border-bottom: 1px solid #e7edf3; font-size: 13px; vertical-align: top; }
    th { color: #263753; background: #edf3fa; }
    td { color: #506078; }
    tr:last-child td { border-bottom: 0; }
    .articles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-link { padding: 14px; color: #25416c; background: #fff; border: 1px solid var(--line); font-size: 13px; font-weight: 700; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { border-color: var(--blue); transform: translateY(-2px); }
    .faq-list { display: grid; gap: 8px; }
    details { border: 1px solid var(--line); background: #fff; }
    summary { position: relative; padding: 15px 42px 15px 16px; cursor: pointer; list-style: none; font-weight: 730; }
    summary::-webkit-details-marker { display: none; }
    summary::after { position: absolute; right: 16px; top: 50%; color: var(--blue); content: "+"; font-size: 22px; transform: translateY(-55%); }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 16px 16px; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
    .contact-info { display: grid; gap: 12px; }
    .contact-line { padding: 13px 15px; border-left: 3px solid var(--coral); background: #fff; }
    .contact-line strong { display: block; font-size: 14px; }
    .contact-line span, .contact-line a { color: var(--muted); font-size: 13px; }
    .qr-box { display: flex; align-items: center; gap: 14px; padding: 14px; background: #fff; border: 1px solid var(--line); }
    .qr-box img { width: 112px; aspect-ratio: 1; object-fit: contain; }
    .request-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 20px; background: #fff; border: 1px solid var(--line); }
    .form-field { display: grid; gap: 5px; }
    .form-field.full { grid-column: 1 / -1; }
    .form-field label { color: #394a63; font-size: 13px; font-weight: 700; }
    .form-field input, .form-field select, .form-field textarea { width: 100%; min-width: 0; padding: 10px 11px; border: 1px solid #cfd9e5; border-radius: 4px; color: var(--ink); background: #fff; }
    .form-field textarea { min-height: 110px; resize: vertical; }
    .form-submit { grid-column: 1 / -1; justify-self: start; }
    .partners { display: flex; flex-wrap: wrap; gap: 8px; }
    .partners a { padding: 7px 10px; border: 1px solid #d7e0eb; background: #fff; color: #40536e; font-size: 12px; }
    .site-footer { padding: 24px 0; color: #34445d; background: #e9eef4; border-top: 1px solid #d8e0e9; }
    .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .footer-inner p { margin: 0; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 14px; font-size: 12px; }
    .footer-links a { color: #34445d; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating a, .to-top { display: inline-flex; align-items: center; justify-content: center; min-width: 46px; min-height: 42px; padding: 8px 12px; border: 1px solid #cfdae8; background: #fff; color: #244879; box-shadow: 0 5px 18px rgba(26,43,69,.12); font-size: 12px; font-weight: 750; }
    .to-top { display: none; cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (max-width: 980px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .header-inner { gap: 10px; }
      .nav-area { gap: 10px; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .articles { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 66px; }
      .menu-toggle { display: inline-flex; }
      .header-cta { display: none; }
      .nav-area { position: absolute; top: 65px; left: 0; right: 0; display: none; align-items: stretch; padding: 12px 16px 16px; background: #fff; border-bottom: 1px solid var(--line); }
      .nav-area.is-open { display: block; }
      .nav-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
      .nav-links a { padding: 10px 7px; text-align: center; }
      .hero { padding: 62px 0 43px; }
      .hero::before { right: 23px; top: 22px; width: 66px; }
      .hero p { font-size: 15px; }
      .band { padding: 43px 0; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 10px; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .intro-grid, .industries, .rating-layout, .contact-grid { grid-template-columns: 1fr; gap: 22px; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 15px 18px; padding-left: 3px; }
      .step { margin-top: 13px; }
      .visual-grid { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-inner { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 520px) {
      .brand-name { font-size: 15px; }
      .ai-page-logo { width: 34px; }
      .nav-links { grid-template-columns: repeat(2, 1fr); }
      .hero-actions .button { width: 100%; }
      .services-grid, .review-grid, .visual-grid, .industry-list, .check-list { grid-template-columns: 1fr; }
      .articles { grid-template-columns: repeat(2, 1fr); }
      .request-form { grid-template-columns: 1fr; }
      .form-field.full, .form-submit { grid-column: auto; }
      .qr-box { align-items: flex-start; }
      .floating { right: 9px; bottom: 10px; }
      .floating a, .to-top { min-width: 42px; padding: 7px 9px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }