:root {
      color-scheme: light;
      --ink: #142b2a;
      --muted: #5e716e;
      --line: #dce8e3;
      --paper: #f7faf8;
      --white: #fff;
      --green: #147d61;
      --green-dark: #075a48;
      --lime: #c9ef63;
      --coral: #ef7657;
      --blue: #d9eff2;
      --shadow: 0 16px 44px rgba(20, 61, 50, .09);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, ui-sans-serif, system-ui, -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; top: 0; z-index: 20; background: rgba(247,250,248,.95); border-bottom: 1px solid rgba(220,232,227,.85); backdrop-filter: blur(12px); }
    .nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 40px; height: 40px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 9px 10px; color: #405652; text-decoration: none; font-size: 13px; white-space: nowrap; border-radius: 6px; transition: background .2s, color .2s; }
    .nav-links a:hover { background: #e8f2ed; color: var(--green-dark); }
    .nav-actions { display: flex; gap: 9px; align-items: center; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 6px; padding: 8px 11px; cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 6px; background: var(--green); color: #fff; font-weight: 700; text-decoration: none; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
    .button:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 8px 20px rgba(7,90,72,.18); }
    .button.secondary { color: var(--green-dark); background: var(--white); border-color: #bdd8ce; }
    .button.secondary:hover { background: #eff8f3; }
    .hero { position: relative; overflow: hidden; padding: 74px 0 50px; background: linear-gradient(135deg, #eff9f1 0%, #f8fbf7 48%, #e5f4ef 100%); }
    .hero::before { content: ""; position: absolute; width: 390px; aspect-ratio: 1; right: -80px; top: -150px; border: 1px solid rgba(20,125,97,.16); border-radius: 50%; box-shadow: 0 0 0 34px rgba(20,125,97,.035), 0 0 0 72px rgba(20,125,97,.025); }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr); gap: 42px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--green-dark); font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); }
    h1 { max-width: 700px; margin: 16px 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.1; }
    .hero-copy { max-width: 650px; color: #49625d; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 26px; }
    .hero-note { margin-top: 19px; color: #60736e; font-size: 13px; }
    .hero-panel { padding: 25px; border: 1px solid #d2e6dc; border-radius: 10px; background: rgba(255,255,255,.82); box-shadow: var(--shadow); }
    .hero-panel h2 { margin: 0 0 8px; font-size: 18px; }
    .hero-panel p { margin: 0; color: var(--muted); font-size: 14px; }
    .model-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .model-tags span, .tag { display: inline-flex; padding: 5px 9px; border-radius: 4px; color: #28574a; background: #e8f4ed; font-size: 12px; font-weight: 700; }
    .hero-bottom { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 42px; border-top: 1px solid #d6e7de; }
    .metric { padding: 18px 16px 0 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 19px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section.alt { background: #eff5f1; }
    .section-heading { max-width: 720px; margin-bottom: 30px; }
    .section-heading h2 { margin: 8px 0 10px; font-size: clamp(27px, 3.2vw, 40px); line-height: 1.2; }
    .section-heading p { margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 46px; align-items: start; }
    .intro-copy p { color: #526661; }
    .intro-points { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 24px; margin: 22px 0 0; padding: 0; list-style: none; }
    .intro-points li { padding: 12px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .intro-points li::before { content: "✓"; margin-right: 9px; color: var(--green); }
    .capability-list { border-top: 1px solid var(--line); }
    .capability-row { display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 15px 0; border-bottom: 1px solid var(--line); }
    .capability-row b { color: var(--coral); font-size: 13px; }
    .capability-row h3 { margin: 0 0 3px; font-size: 16px; }
    .capability-row p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .service-item { position: relative; padding: 20px; border: 1px solid var(--line); border-radius: 7px; background: var(--white); transition: transform .22s, box-shadow .22s, border-color .22s; }
    .service-item:hover { transform: translateY(-4px); border-color: #a5cdbd; box-shadow: var(--shadow); }
    .service-item .number { color: var(--green); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 7px 0; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-item .tag { margin-top: 14px; }
    .wide-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 0; overflow: hidden; border-radius: 8px; background: var(--green-dark); color: #fff; }
    .wide-feature-copy { padding: 34px; }
    .wide-feature-copy h3 { margin: 0 0 12px; font-size: 27px; }
    .wide-feature-copy p { margin: 0; color: #d5e8df; }
    .wide-feature-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1px; background: rgba(255,255,255,.18); }
    .wide-feature-list div { display: flex; align-items: center; min-height: 76px; padding: 15px; background: #0c6c54; font-size: 14px; font-weight: 700; }
    .steps { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 17px 20px 16px 0; border-top: 2px solid #b9d5c9; counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 12px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .step h3 { margin: 0 0 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; }
    .industry { padding: 17px; background: #fff; border-left: 3px solid var(--lime); }
    .industry h3 { margin: 0 0 5px; font-size: 15px; }
    .industry p { margin: 0; color: var(--muted); font-size: 12px; }
    .network-band { display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 25px 28px; border: 1px solid #cfe0d8; border-radius: 7px; background: #fff; }
    .network-band h3 { margin: 0 0 4px; font-size: 19px; }
    .network-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
    .comparison { width: 100%; min-width: 680px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid #e8efeb; vertical-align: top; }
    .comparison th { background: #eaf4ee; font-size: 13px; }
    .comparison td { font-size: 13px; color: #4e625c; }
    .comparison td:first-child { color: var(--ink); font-weight: 700; }
    .rating-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-bottom: 18px; padding: 18px 20px; border-left: 4px solid var(--coral); background: #fff; }
    .rating-strip strong { color: var(--green-dark); font-size: 25px; }
    .stars { color: #c97821; letter-spacing: 2px; font-size: 17px; }
    .reviews { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 13px; }
    .review { padding: 19px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
    .review p { margin: 0 0 15px; color: #455c56; font-size: 14px; }
    .review b { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 16px; align-items: stretch; }
    .case-main { overflow: hidden; border-radius: 7px; background: #fff; }
    .media-frame { display: grid; place-items: center; aspect-ratio: 16 / 8; overflow: hidden; background: #e5f0eb; }
    .media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 18px 20px; }
    .case-copy h3 { margin: 0 0 5px; font-size: 17px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-side { display: grid; gap: 12px; }
    .case-side article { display: grid; grid-template-columns: 100px 1fr; gap: 14px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
    .case-side img { display: block; width: 100px; aspect-ratio: 1; object-fit: cover; border-radius: 4px; }
    .case-side h3 { margin: 0 0 4px; font-size: 14px; }
    .case-side p { margin: 0; color: var(--muted); font-size: 12px; }
    .article-list { border-top: 1px solid var(--line); }
    .article-list a { display: flex; justify-content: space-between; gap: 16px; padding: 15px 2px; border-bottom: 1px solid var(--line); text-decoration: none; font-weight: 700; }
    .article-list a span { color: var(--green); font-size: 13px; }
    .token-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; }
    .token-grid p { color: var(--muted); }
    .token-steps { display: grid; gap: 10px; }
    .token-steps div { display: flex; gap: 13px; align-items: center; padding: 13px 16px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.65); }
    .token-steps b { color: var(--green); font-size: 13px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 36px 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 12px; color: var(--green); font-size: 22px; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 28px 17px 0; color: var(--muted); font-size: 14px; }
    .contact-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 40px; align-items: start; }
    .contact-details { display: grid; gap: 12px; margin-top: 22px; }
    .contact-details div { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .contact-details b { display: block; font-size: 13px; }
    .contact-details span, .contact-details a { color: var(--muted); font-size: 14px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
    .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-height: 44px; padding: 10px 11px; border: 1px solid #cbd9d3; border-radius: 4px; background: #fbfdfb; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .affiliate { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-top: 23px; border-top: 1px solid var(--line); }
    .affiliate h3 { margin: 0 0 4px; font-size: 18px; }
    .affiliate p { margin: 0; color: var(--muted); font-size: 14px; }
    .site-footer { padding: 28px 0; color: #dcebe4; background: #123d33; }
    .footer-main { display: flex; justify-content: space-between; align-items: center; gap: 22px; }
    .footer-main p { margin: 4px 0 0; color: #b9d2c7; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px 16px; }
    .footer-links a { color: #e2efe8; font-size: 12px; text-decoration: none; }
    .footer-links a:hover { text-decoration: underline; }
    .float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { min-width: 48px; min-height: 44px; display: grid; place-items: center; padding: 0 12px; border: 1px solid #c7ded3; border-radius: 6px; background: #fff; color: var(--green-dark); box-shadow: 0 6px 18px rgba(20,61,50,.12); text-decoration: none; font-size: 12px; font-weight: 800; }
    .float-contact a:hover { background: #e8f4ed; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 71px; left: 0; right: 0; padding: 10px 20px 16px; background: var(--paper); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
      .nav-links.open { display: flex; }
      .menu-toggle { display: inline-flex; }
      .nav-actions .button { display: none; }
      .hero-inner, .intro-grid, .contact-layout { grid-template-columns: 1fr; }
      .hero-inner { gap: 27px; }
      .hero-panel { max-width: 580px; }
      .industry-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .nav-wrap { min-height: 64px; }
      .nav-links { top: 63px; }
      .hero { padding: 51px 0 34px; }
      .hero-inner { gap: 25px; }
      .hero-copy { font-size: 15px; }
      .hero-bottom { grid-template-columns: repeat(2,1fr); margin-top: 28px; }
      .metric { padding: 13px 8px 0 0; }
      .section { padding: 54px 0; }
      .service-grid { grid-template-columns: 1fr; }
      .wide-feature, .token-grid, .case-grid { grid-template-columns: 1fr; }
      .wide-feature-copy { padding: 24px; }
      .wide-feature-list div { min-height: 65px; }
      .steps { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
      .step { padding-right: 12px; }
      .reviews { grid-template-columns: 1fr; }
      .industry-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
      .industry { padding: 13px; }
      .network-band, .affiliate { align-items: flex-start; flex-direction: column; }
      .case-side article { grid-template-columns: 82px 1fr; }
      .case-side img { width: 82px; }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field.full { grid-column: auto; }
      .footer-main { align-items: flex-start; flex-direction: column; }
      .footer-links { justify-content: flex-start; }
      .float-contact { right: 10px; bottom: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }