:root {
      color-scheme: light;
      --ink: #292422;
      --muted: #706764;
      --paper: #fffaf7;
      --white: #ffffff;
      --line: #eadbd5;
      --red: #c52e35;
      --red-dark: #92212a;
      --coral: #f4c1ad;
      --peach: #fff0e9;
      --green: #246b58;
      --gold: #a86620;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    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(255,250,247,.96);
      border-bottom: 1px solid rgba(234,219,213,.9);
      backdrop-filter: blur(12px);
    }
    .header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; text-decoration: none; }
    .ai-page-logo { display: block; width: 148px; max-height: 44px; object-fit: contain; }
    .nav-wrap { display: flex; align-items: center; gap: 20px; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 9px 10px; color: #504744; font-size: 13px; text-decoration: none; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--red); }
    .header-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 10px 18px; border: 1px solid var(--red);
      background: var(--red); color: #fff; text-decoration: none; font-weight: 700;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .header-cta { min-height: 40px; padding: 8px 14px; font-size: 13px; white-space: nowrap; }
    .button:hover, .header-cta:hover { transform: translateY(-2px); background: var(--red-dark); box-shadow: 0 8px 20px rgba(146,33,42,.2); }
    .button.secondary { background: transparent; color: var(--red-dark); }
    .button.secondary:hover { background: var(--peach); box-shadow: none; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: var(--white); color: var(--ink); cursor: pointer; }
    .hero {
      position: relative; overflow: hidden; padding: 70px 0 58px;
      background:
        linear-gradient(118deg, rgba(255,250,247,.98) 0%, rgba(255,240,233,.95) 56%, rgba(255,225,213,.9) 100%);
      border-bottom: 1px solid #f0d2c6;
    }
    .hero::before {
      content: ""; position: absolute; width: 360px; height: 360px; right: -100px; top: -180px;
      border: 1px solid rgba(197,46,53,.18); border-radius: 50%;
      box-shadow: 0 0 0 32px rgba(197,46,53,.035), 0 0 0 66px rgba(197,46,53,.025);
      animation: orbit 18s linear infinite;
    }
    .hero::after { content: ""; position: absolute; width: 110px; height: 110px; right: 18%; bottom: 26px; border: 1px solid rgba(197,46,53,.2); transform: rotate(45deg); }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(250px,.8fr); align-items: center; gap: 54px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: var(--red-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 25px; height: 2px; background: var(--red); }
    h1 { max-width: 720px; margin: 0; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 660px; margin: 22px 0 26px; color: #5b504d; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { display: flex; flex-wrap: wrap; gap: 14px 22px; margin-top: 24px; color: #635855; font-size: 13px; }
    .hero-note span::before { content: "✓"; margin-right: 7px; color: var(--green); font-weight: 800; }
    .hero-side { position: relative; padding: 28px 26px; background: rgba(255,255,255,.7); border: 1px solid rgba(197,46,53,.19); border-left: 4px solid var(--red); }
    .hero-side-label { margin: 0 0 8px; color: var(--red-dark); font-size: 12px; font-weight: 800; }
    .hero-side h2 { margin: 0 0 12px; font-size: 22px; line-height: 1.35; }
    .hero-side p { margin: 0; color: var(--muted); font-size: 14px; }
    .hero-side-rule { height: 1px; margin: 20px 0; background: var(--line); }
    .hero-side strong { color: var(--red-dark); }
    .metrics { position: relative; z-index: 2; margin-top: -1px; background: var(--white); border-bottom: 1px solid var(--line); }
    .metric-row { display: grid; grid-template-columns: repeat(4,1fr); }
    .metric { padding: 22px 20px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--red-dark); font-size: 21px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 72px 0; }
    .section.tint { background: #fff3ee; border-block: 1px solid #f2ddd4; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
    .section-head > div { max-width: 700px; }
    .section-kicker { margin: 0 0 8px; color: var(--red); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: clamp(27px, 3vw, 38px); line-height: 1.22; letter-spacing: 0; }
    .section-intro { margin: 12px 0 0; color: var(--muted); max-width: 720px; }
    .text-link { color: var(--red-dark); font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 4px; white-space: nowrap; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 46px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: #554b48; }
    .intro-points { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
    .intro-points li { padding: 13px 0; border-bottom: 1px solid var(--line); color: #514744; }
    .intro-points li::before { content: "＋"; margin-right: 8px; color: var(--red); font-weight: 800; }
    .editorial { padding: 24px 26px; background: #fff; border-top: 3px solid var(--red); }
    .editorial h3 { margin: 0 0 12px; font-size: 20px; }
    .editorial ol { margin: 0; padding-left: 22px; color: #5e5451; }
    .editorial li { padding: 4px 0; }
    .services-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
    .service { min-height: 176px; padding: 22px; background: var(--white); border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .service:hover, .quote:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(80,44,36,.08); }
    .service .num { color: var(--red); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 10px 0 8px; font-size: 18px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .service-tags span { padding: 5px 10px; background: #fff; border: 1px solid var(--line); color: #5c514e; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; border-block: 1px solid var(--line); }
    .step { position: relative; padding: 22px 20px 24px 0; }
    .step:not(:last-child)::after { content: "→"; position: absolute; right: 17px; top: 27px; color: var(--red); font-size: 21px; }
    .step-index { color: var(--red); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 8px 0 6px; font-size: 17px; }
    .step p { max-width: 225px; margin: 0; color: var(--muted); font-size: 13px; }
    .industries { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .industry-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .industry-list li { padding: 12px 0; border-bottom: 1px solid var(--line); }
    .industry-list strong { display: block; font-size: 15px; }
    .industry-list span { display: block; color: var(--muted); font-size: 13px; }
    .network { padding: 27px; background: var(--red-dark); color: #fff; }
    .network h3 { margin: 0 0 10px; font-size: 22px; }
    .network p { margin: 0; color: #f9e3dc; }
    .network-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
    .network-points span { padding: 7px 10px; border: 1px solid rgba(255,255,255,.35); font-size: 12px; }
    .comparison-wrap { overflow-x: auto; background: var(--white); border: 1px solid var(--line); }
    .comparison { width: 100%; min-width: 680px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    .comparison th { background: #fff2ed; color: #433735; font-size: 13px; }
    .comparison td { color: #5b504d; font-size: 14px; }
    .comparison tr:last-child td { border-bottom: 0; }
    .comparison td:nth-child(2) { color: var(--red-dark); font-weight: 700; }
    .rating-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 0 0 18px; padding: 19px 22px; background: #fff; border: 1px solid var(--line); }
    .rating-row strong { display: block; color: var(--red-dark); font-size: 26px; }
    .rating-row span { color: var(--muted); font-size: 13px; }
    .stars { color: var(--gold); font-size: 21px; letter-spacing: 0; }
    .cases { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 16px; align-items: start; }
    .case { padding: 22px; background: #fff; border-top: 2px solid var(--red); }
    .case h3 { margin: 8px 0; font-size: 18px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-label { color: var(--red-dark); font-size: 12px; font-weight: 800; }
    .quotes { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
    .quote { padding: 20px; background: #fff; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { margin: 0 0 17px; color: #514744; font-size: 14px; }
    .quote footer { display: flex; justify-content: space-between; gap: 10px; color: var(--muted); font-size: 12px; }
    .quote footer strong { color: var(--ink); font-size: 13px; }
    .price-band { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 28px; background: #fff; border-left: 4px solid var(--red); }
    .price-band h3 { margin: 0 0 7px; font-size: 22px; }
    .price-band p { margin: 0; color: var(--muted); }
    .model-list { margin-top: 18px; color: #655955; font-size: 13px; line-height: 2; }
    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 28px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 2px; color: var(--red); font-size: 20px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 20px 17px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 30px; }
    .article-list a { display: flex; justify-content: space-between; gap: 15px; padding: 15px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
    .article-list a span:first-child { font-weight: 700; }
    .article-list a span:last-child { color: var(--red-dark); font-size: 13px; white-space: nowrap; }
    .media-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 28px; }
    .media-frame { overflow: hidden; aspect-ratio: 16 / 9; background: #f0e3dd; }
    .media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .contact-grid { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 36px; align-items: start; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 45px; padding: 10px 12px; border: 1px solid #d9c9c3; border-radius: 0; background: #fff; color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .contact-aside { padding-left: 24px; border-left: 1px solid var(--line); }
    .contact-aside h3 { margin: 0 0 12px; font-size: 20px; }
    .contact-aside p { margin: 7px 0; color: #605552; font-size: 14px; }
    .qr-frame { width: 150px; margin-top: 17px; padding: 8px; background: #fff; border: 1px solid var(--line); }
    .qr-frame img { display: block; width: 100%; height: auto; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; border-block: 1px solid var(--line); }
    .join-band p { margin: 6px 0 0; color: var(--muted); }
    .site-footer { padding: 28px 0; background: #fff; color: #403835; border-top: 1px solid var(--line); }
    .footer-row { display: flex; justify-content: space-between; gap: 24px; align-items: start; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 700px; }
    .footer-links a { color: #5c504c; font-size: 13px; text-decoration: none; }
    .footer-meta { color: #6f625e; font-size: 12px; text-align: right; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 22px; display: grid; gap: 8px; }
    .float-contact a { min-width: 48px; padding: 11px 13px; background: var(--red-dark); color: #fff; font-size: 12px; font-weight: 700; text-align: center; text-decoration: none; box-shadow: 0 4px 14px rgba(73,29,27,.2); }
    .float-contact a:last-child { background: #fff; color: var(--red-dark); border: 1px solid var(--red-dark); }
    .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: 1050px) {
      .nav-links { gap: 0; }
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .nav-wrap { gap: 12px; }
      .header-cta { padding-inline: 10px; }
    }
    @media (max-width: 820px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-row { min-height: 64px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-wrap { gap: 10px; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 10px 16px 15px; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 8px; font-size: 14px; }
      .hero { padding: 55px 0 48px; }
      .hero-inner { grid-template-columns: 1fr; gap: 30px; }
      .hero-side { max-width: 600px; }
      .section { padding: 58px 0; }
      .services-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .cases { grid-template-columns: 1fr 1fr; }
      .case:first-child { grid-column: 1 / -1; }
      .quotes { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .contact-grid { grid-template-columns: 1fr 250px; gap: 25px; }
    }
    @media (max-width: 560px) {
      .ai-page-logo { width: 126px; }
      .header-cta { min-height: 38px; padding: 7px 10px; font-size: 12px; }
      .hero { padding: 44px 0 38px; }
      h1 { font-size: 39px; }
      .hero-copy { font-size: 15px; }
      .hero-side { padding: 21px; }
      .metric-row { grid-template-columns: 1fr 1fr; }
      .metric { padding: 16px 12px; border-bottom: 1px solid var(--line); }
      .metric:nth-child(2) { border-right: 0; }
      .section-head { align-items: start; flex-direction: column; gap: 12px; }
      .intro-grid, .industries, .contact-grid { grid-template-columns: 1fr; }
      .intro-points { grid-template-columns: 1fr; }
      .services-grid, .quotes, .faq-grid, .article-list { grid-template-columns: 1fr; }
      .service { min-height: 0; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step { padding: 18px 14px 18px 0; }
      .step:nth-child(2)::after { display: none; }
      .industries .industry-list { grid-template-columns: 1fr 1fr; gap: 0 14px; }
      .cases { grid-template-columns: 1fr; }
      .case:first-child { grid-column: auto; }
      .rating-row { align-items: flex-start; flex-direction: column; }
      .price-band { grid-template-columns: 1fr; padding: 22px; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .contact-aside { padding: 22px 0 0; border-left: 0; border-top: 1px solid var(--line); }
      .media-strip { grid-template-columns: 1fr; }
      .join-band, .footer-row { align-items: flex-start; flex-direction: column; }
      .footer-meta { text-align: left; }
      .float-contact { right: 10px; bottom: 12px; }
      .float-contact a { padding: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }