:root {
      color-scheme: light;
      --ink: #172331;
      --muted: #586778;
      --line: #dce4ea;
      --paper: #f8fafc;
      --white: #fff;
      --blue: #1666d3;
      --cyan: #00a9ad;
      --lime: #c8e94b;
      --coral: #ff795d;
      --navy: #142b40;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    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; }
    img { max-width: 100%; height: auto; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 18px; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 39px; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #354456; text-decoration: none; font-size: 13px; }
    .nav-links a:hover { color: var(--blue); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 18px; border: 0; border-radius: 4px; background: var(--blue); color: white; text-decoration: none; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(22,102,211,.2); background: #0e55b6; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: white; color: var(--ink); cursor: pointer; }
    .hero { position: relative; overflow: hidden; background: linear-gradient(120deg, #e8f8fa 0%, #edf4ff 49%, #f6fbe7 100%); border-bottom: 1px solid #dbe9ec; }
    .hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .38; background-image: linear-gradient(rgba(22,102,211,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(22,102,211,.06) 1px, transparent 1px); background-size: 36px 36px; mask-image: linear-gradient(to right, #000, transparent 80%); }
    .hero-inner { position: relative; padding-block: 66px 48px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; color: #087f84; font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    .eyebrow::before { content: ""; width: 22px; height: 3px; background: var(--coral); }
    h1 { max-width: 740px; margin: 0; font-size: clamp(36px, 5vw, 60px); line-height: 1.13; letter-spacing: 0; }
    .hero-copy > p { max-width: 650px; margin: 20px 0 24px; color: #46586a; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
    .button-outline { border: 1px solid #9eb4c4; background: rgba(255,255,255,.78); color: var(--ink); }
    .button-outline:hover { background: white; }
    .hero-note { margin: 14px 0 0; color: #586778; font-size: 13px; }
    .hero-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 43px; border-top: 1px solid rgba(35,76,106,.2); }
    .metric { padding: 20px 20px 6px 0; }
    .metric + .metric { padding-left: 22px; border-left: 1px solid rgba(35,76,106,.2); }
    .metric strong { display: block; font-size: 21px; line-height: 1.3; }
    .metric span { color: #596c7c; font-size: 13px; }
    .section { padding-block: 68px; }
    .section-white { background: var(--white); }
    .section-tint { background: #eef5f5; }
    .section-dark { background: var(--navy); color: #f6fbff; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin: 0 0 7px; color: #07878a; font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.25; letter-spacing: 0; }
    .section-head p, .lead { margin: 10px 0 0; color: var(--muted); }
    .section-dark .section-head p, .section-dark .lead { color: #c3d2dc; }
    h3 { margin: 0 0 9px; font-size: 18px; line-height: 1.4; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: #4c5c6a; }
    .check-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px 22px; padding: 0; margin: 22px 0 0; list-style: none; }
    .check-list li { display: flex; gap: 10px; align-items: baseline; color: #344554; }
    .check-list li::before { content: "✓"; color: #07878a; font-weight: 900; }
    .platform-block { padding: 23px; border-left: 4px solid var(--cyan); background: #f2f8f7; }
    .platform-block p { margin: 0; color: #435465; }
    .tag-list { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 17px; }
    .tag { padding: 5px 10px; border: 1px solid #cddedb; border-radius: 3px; color: #24515a; background: white; font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; }
    .service { min-height: 152px; padding: 19px; border: 1px solid var(--line); background: white; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
    .service:hover { transform: translateY(-3px); border-color: #8dbcc0; box-shadow: 0 10px 24px rgba(19,53,72,.08); }
    .service .number { display: inline-block; margin-bottom: 12px; color: #00898c; font-size: 12px; font-weight: 800; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflows { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; border-top: 1px solid #b9d4d4; }
    .workflow { position: relative; padding: 23px 20px 0 0; }
    .workflow:not(:first-child) { padding-left: 20px; border-left: 1px solid #b9d4d4; }
    .workflow b { display: block; margin-bottom: 9px; color: #087f84; font-size: 14px; }
    .workflow p { margin: 0; color: #526372; font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
    .industry { padding: 18px; border-top: 3px solid var(--coral); background: white; }
    .industry:nth-child(2n) { border-color: var(--cyan); }
    .industry p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-band { display: grid; grid-template-columns: .8fr 1.2fr; gap: 36px; align-items: center; padding: 25px 0; border-block: 1px solid rgba(255,255,255,.2); }
    .network-band h3 { font-size: 22px; }
    .network-band p { margin: 0; color: #c3d2dc; }
    .network-band .tag-list { margin-top: 0; }
    .network-band .tag { border-color: #536b7e; background: #203d54; color: #eff8fc; }
    .case-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
    .case-copy { padding-right: 16px; }
    .case-copy p { color: var(--muted); }
    .case-images { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: start; }
    .case-images figure { margin: 0; }
    .case-images img { display: block; width: 100%; height: auto; border: 1px solid var(--line); background: #edf1f4; }
    .case-images figcaption { margin-top: 7px; color: var(--muted); font-size: 12px; }
    .score-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 22px; padding: 22px 25px; background: #eaf6f4; border-left: 4px solid var(--cyan); }
    .score-panel strong { display: block; font-size: 24px; }
    .score { color: #087f84; font-size: 36px; font-weight: 900; white-space: nowrap; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; border-collapse: collapse; min-width: 690px; }
    th, td { padding: 13px 15px; text-align: left; border-bottom: 1px solid #e7edf0; vertical-align: top; }
    th { color: #304453; background: #edf3f5; font-size: 13px; }
    td { color: #4d5c69; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .good { color: #087f68; font-weight: 700; }
    .match-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 34px; align-items: start; }
    .match-copy p { color: var(--muted); }
    .match-points { padding: 0; margin: 20px 0; list-style: none; }
    .match-points li { padding: 10px 0; border-bottom: 1px solid var(--line); color: #394b59; }
    .form-panel { padding: 24px; border: 1px solid var(--line); background: white; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #344453; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #cbd6dd; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(22,102,211,.25); border-color: var(--blue); }
    .form-submit { margin-top: 16px; cursor: pointer; }
    .form-note { margin: 10px 0 0; color: #697885; font-size: 12px; }
    .comments { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .quote { margin: 0; padding: 19px; border-top: 3px solid var(--cyan); background: #f3f7f8; }
    .quote p { margin: 0 0 14px; color: #40515f; font-size: 14px; }
    .quote footer { color: #64727d; font-size: 12px; font-weight: 700; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 26px; border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 34px 17px 0; color: #253746; font-weight: 700; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 14px; color: #07878a; font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 20px 17px 0; color: var(--muted); font-size: 14px; }
    .resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
    .resource-list { margin: 0; padding: 0; list-style: none; }
    .resource-list li { padding: 12px 0; border-bottom: 1px solid var(--line); }
    .resource-list a { color: #145fae; text-decoration: none; }
    .resource-list a:hover { text-decoration: underline; }
    .resource-list small { display: block; color: var(--muted); }
    .contact-row { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
    .contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 19px; }
    .contact-details div { padding: 12px 14px; background: #203d54; }
    .contact-details strong { display: block; color: #fff; font-size: 13px; }
    .contact-details span, .contact-details a { color: #cce0ea; font-size: 14px; text-decoration: none; }
    .qr-wrap { max-width: 190px; padding: 10px; background: white; }
    .qr-wrap img { display: block; width: 100%; height: auto; }
    .footer { padding-block: 25px; background: #e7eef1; color: #344453; }
    .footer-main { display: flex; align-items: start; justify-content: space-between; gap: 28px; }
    .footer p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; gap: 8px 16px; flex-wrap: wrap; }
    .footer-links a { color: #31556c; font-size: 13px; text-decoration: none; }
    .footer-links a:hover { text-decoration: underline; }
    .float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: 50%; background: var(--coral); color: #172331; box-shadow: 0 7px 20px rgba(23,35,49,.2); font-size: 13px; font-weight: 900; text-decoration: none; }
    .back-top { position: fixed; right: 23px; bottom: 82px; z-index: 15; display: none; width: 42px; height: 42px; border: 1px solid #cbd6dd; border-radius: 50%; background: white; color: var(--ink); cursor: pointer; }
    .back-top.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1050px) {
      .nav-row { gap: 12px; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { padding-inline: 12px; font-size: 13px; }
      .service-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 780px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 63px; left: 0; right: 0; padding: 10px 16px 16px; border-bottom: 1px solid var(--line); background: white; box-shadow: 0 10px 20px rgba(23,35,49,.08); }
      .nav-links.open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 10px; font-size: 14px; }
      .hero-inner { padding-block: 48px 35px; }
      .hero-metrics { grid-template-columns: 1fr 1fr; row-gap: 8px; margin-top: 30px; }
      .metric { padding: 15px 10px 8px 0; }
      .metric + .metric { padding-left: 14px; }
      .metric:nth-child(3) { padding-left: 0; border-left: 0; }
      .section { padding-block: 50px; }
      .section-head { display: block; }
      .section-head > a { display: inline-flex; margin-top: 15px; }
      .intro-grid, .case-layout, .match-grid, .contact-row, .resource-grid { grid-template-columns: 1fr; gap: 24px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .workflows { grid-template-columns: 1fr 1fr; row-gap: 20px; }
      .workflow:nth-child(3) { padding-left: 0; border-left: 0; }
      .industry-grid { grid-template-columns: 1fr 1fr; }
      .comments { grid-template-columns: 1fr 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .network-band { grid-template-columns: 1fr; gap: 16px; }
    }
    @media (max-width: 500px) {
      h1 { font-size: 38px; }
      .hero-copy > p { font-size: 15px; }
      .hero-actions { align-items: stretch; }
      .hero-actions .button { flex: 1 1 100%; }
      .service-grid, .industry-grid, .comments, .form-grid, .contact-details { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .workflows { grid-template-columns: 1fr; }
      .workflow, .workflow:not(:first-child) { padding: 15px 0 0; border-left: 0; border-top: 1px solid #b9d4d4; }
      .workflow:first-child { border-top: 0; }
      .case-images { grid-template-columns: 1fr; }
      .score-panel { align-items: start; flex-direction: column; }
      .footer-main { flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
      .back-top { right: 17px; bottom: 74px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }