:root {
      color-scheme: light;
      --ink: #17212b;
      --muted: #56636f;
      --paper: #f5f7fa;
      --white: #fff;
      --line: #dce3e9;
      --coral: #f14d43;
      --coral-dark: #c8322c;
      --teal: #007e80;
      --lime: #c8ec46;
      --navy: #102c37;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    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; }
    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); }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .brand img { width: 38px; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #3d4a55; font-size: 13px; text-decoration: none; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--coral-dark); }
    .nav-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
    .menu-toggle { display: none; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 4px; background: var(--coral); color: #fff; font-weight: 750; text-decoration: none; cursor: pointer; transition: transform .18s ease, background .18s ease, box-shadow .18s ease; }
    .button:hover { background: var(--coral-dark); box-shadow: 0 7px 18px rgba(200,50,44,.2); transform: translateY(-2px); }
    .button.secondary { background: var(--navy); }
    .button.outline { background: transparent; border-color: #9aabb4; color: var(--ink); }
    .hero { position: relative; overflow: hidden; background: var(--navy); color: #fff; }
    .hero::before { position: absolute; inset: 0 0 auto auto; width: 33%; height: 100%; background: var(--coral); content: ""; clip-path: polygon(52% 0,100% 0,100% 100%,0 100%); opacity: .95; }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(240px,.8fr); align-items: center; gap: 48px; padding-block: 68px 54px; }
    .hero-copy { max-width: 690px; }
    .eyebrow { margin: 0 0 12px; color: var(--lime); font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 700px; margin: 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; }
    .hero-copy > p:not(.eyebrow) { max-width: 610px; margin: 20px 0 25px; color: #e0e9ec; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
    .hero-actions .button.outline { color: #fff; border-color: #91a8ae; }
    .hero-note { display: flex; gap: 10px; align-items: center; margin-top: 22px; color: #c4d4d8; font-size: 13px; }
    .hero-mark { display: grid; gap: 14px; max-width: 330px; justify-self: end; }
    .hero-mark strong { font-size: 24px; line-height: 1.3; }
    .hero-mark p { margin: 0; color: #e3ecee; }
    .hero-mark .mark-line { width: 66px; height: 5px; background: var(--lime); }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: -1px; background: var(--white); border: 1px solid var(--line); }
    .metric { padding: 20px 24px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--teal); font-size: 20px; }
    .metric span { color: var(--muted); font-size: 13px; }
    main { padding-bottom: 42px; }
    .section { padding: 64px 0; border-bottom: 1px solid var(--line); }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 26px; }
    .section-heading > div { max-width: 720px; }
    .section-kicker { margin: 0 0 7px; color: var(--coral-dark); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: 32px; line-height: 1.2; }
    .section-heading p { max-width: 560px; margin: 10px 0 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
    .intro-copy { max-width: 580px; color: var(--muted); }
    .intro-copy p:first-child { margin-top: 0; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .capability-list strong { display: block; margin-bottom: 3px; }
    .capability-list span { color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service-item { padding: 21px; background: #fff; border-top: 3px solid var(--teal); box-shadow: 0 2px 10px rgba(20,42,53,.04); transition: transform .18s ease, box-shadow .18s ease; }
    .service-item:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(20,42,53,.1); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .wide-band { background: #e8f0ee; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; counter-reset: step; }
    .workflow article { position: relative; padding: 18px 14px 8px 0; border-top: 2px solid var(--teal); counter-increment: step; }
    .workflow article::before { display: block; margin-bottom: 12px; color: var(--coral-dark); content: "0" counter(step); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 0 0 6px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .platforms { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .platforms span { padding: 6px 10px; border: 1px solid #c5d4d2; background: rgba(255,255,255,.65); color: #22424a; font-size: 13px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .comparison { width: 100%; min-width: 690px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 13px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    .comparison th { background: #edf3f2; font-size: 13px; }
    .comparison td { color: #45525c; font-size: 14px; }
    .comparison tr:last-child td { border-bottom: 0; }
    .rating { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 0 0 20px; }
    .rating strong { color: var(--coral-dark); font-size: 30px; }
    .rating span { color: #584400; font-weight: 750; }
    .showcase { display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; align-items: stretch; }
    .showcase-media { display: grid; gap: 12px; }
    .showcase-media img, .case-image img { display: block; width: 100%; height: auto; object-fit: contain; }
    .case-image { margin-bottom: 14px; background: #e9eeef; }
    .case-box { padding: 22px; background: #fff; border: 1px solid var(--line); }
    .case-box h3 { margin: 0 0 8px; }
    .case-box p { margin: 0; color: var(--muted); }
    .testimonials { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .quote { margin: 0; padding: 19px; border-left: 3px solid var(--coral); background: #fff; }
    .quote p { margin: 0 0 14px; color: #3f4b55; font-size: 14px; }
    .quote cite { color: var(--teal); font-size: 13px; font-style: normal; font-weight: 750; }
    .resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; }
    .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: var(--ink); font-weight: 650; text-decoration-color: #9daeb5; text-underline-offset: 4px; }
    .resource-list a:hover { color: var(--coral-dark); }
    .subhead { margin: 0 0 12px; font-size: 19px; }
    .article-links { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; }
    .article-links a { padding: 13px; border: 1px solid var(--line); background: #fff; color: var(--ink); font-size: 13px; text-decoration: none; overflow-wrap: anywhere; }
    .article-links a:hover { border-color: var(--teal); }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 15px 30px 15px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { position: absolute; right: 2px; content: "+"; color: var(--coral-dark); font-size: 20px; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: 0; padding: 0 18px 16px 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .contact-info { padding: 22px; background: var(--navy); color: #fff; }
    .contact-info h3 { margin: 0 0 12px; color: var(--lime); }
    .contact-info p { margin: 9px 0; color: #e0e9ec; }
    .contact-info a { color: #fff; }
    .qr { width: min(180px,100%); margin-top: 12px; padding: 6px; background: #fff; }
    .qr img { display: block; width: 100%; height: auto; }
    .contact-form { 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%; min-width: 0; padding: 11px 12px; border: 1px solid #c8d2d8; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .site-footer { padding: 25px 0; background: #e4eaed; color: #25343d; }
    .footer-row { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
    .footer-row p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 16px; }
    .footer-links a { color: #25343d; font-size: 13px; text-decoration-color: #8c9da5; }
    .float-help { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .float-help a { display: grid; place-items: center; width: 48px; height: 48px; border: 0; border-radius: 50%; background: var(--coral); color: #fff; font-size: 13px; font-weight: 800; text-decoration: none; box-shadow: 0 4px 14px rgba(23,33,43,.2); }
    .float-help a:last-child { background: var(--teal); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1000px) {
      .nav-row { flex-wrap: wrap; padding-block: 12px; }
      .nav-links { order: 3; width: 100%; justify-content: flex-start; }
      .nav-links a { padding-inline: 7px; }
      .nav-actions { margin-left: auto; }
      .hero-inner { grid-template-columns: 1fr .65fr; gap: 24px; }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .nav-row { min-height: 64px; flex-wrap: nowrap; }
      .brand img { width: 33px; }
      .menu-toggle { display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; border: 1px solid var(--line); background: #fff; color: var(--ink); font-size: 20px; cursor: pointer; }
      .nav-links { display: none; order: initial; position: absolute; top: 64px; left: 0; right: 0; width: auto; max-height: calc(100vh - 72px); overflow: auto; padding: 10px 14px 16px; border-bottom: 1px solid var(--line); background: #fff; }
      .nav-links.open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 10px 8px; }
      .nav-actions .button { min-height: 40px; padding: 8px 11px; font-size: 13px; }
      .hero::before { width: 24%; opacity: .42; }
      .hero-inner { grid-template-columns: 1fr; padding-block: 48px 36px; }
      .hero-mark { justify-self: start; max-width: 420px; padding-top: 8px; }
      h1 { font-size: 42px; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding: 45px 0; }
      .section-heading { display: block; }
      h2 { font-size: 28px; }
      .intro-grid, .showcase, .resource-grid, .contact-grid { grid-template-columns: 1fr; gap: 22px; }
      .service-grid, .testimonials { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .footer-row { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 440px) {
      .nav-actions .button.secondary { display: none; }
      .service-grid, .testimonials, .capability-list, .contact-form { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr; gap: 8px; }
      .field.full { grid-column: auto; }
      .article-links { grid-template-columns: 1fr; }
      .hero-actions .button { width: 100%; }
      .float-help { right: 12px; bottom: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }