:root {
      color-scheme: light;
      --ink: #20252b;
      --muted: #616a70;
      --paper: #f8f9f5;
      --white: #fff;
      --line: #dce2da;
      --green: #27634d;
      --green-dark: #194b39;
      --lime: #d9f06c;
      --coral: #f2765b;
      --blue: #5ca6d9;
      --yellow: #f5c84c;
      --max: 1160px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    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; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(248,249,245,.96); border-bottom: 1px solid rgba(32,37,43,.1); backdrop-filter: blur(12px); }
    .header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { max-width: 100%; height: auto; width: 42px; border-radius: 9px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 10px 12px; color: #3c4648; text-decoration: none; font-size: 13px; }
    .nav-links a:hover { color: var(--green); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 5px; padding: 12px 18px; color: #fff; background: var(--green); text-decoration: none; font-weight: 700; cursor: pointer; transition: background .2s ease, transform .2s ease, box-shadow .2s ease; }
    .nav-cta { white-space: nowrap; padding: 10px 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: 0 7px 18px rgba(25,75,57,.2); }
    .button.light { background: var(--lime); color: #1d3028; }
    .button.light:hover { background: #e5f69a; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 5px; width: 42px; height: 42px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; background: #dff0df; border-bottom: 1px solid #c9ddc9; }
    .hero::before { content: ""; position: absolute; inset: 0; opacity: .52; background-image: radial-gradient(#75a982 1px, transparent 1px); background-size: 22px 22px; mask-image: linear-gradient(90deg, black, transparent 70%); }
    .hero-inner { position: relative; padding-block: 80px 62px; display: grid; grid-template-columns: minmax(0,1.25fr) minmax(250px,.75fr); align-items: center; gap: 42px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; text-transform: uppercase; font-size: 12px; font-weight: 800; letter-spacing: 0; color: var(--green); }
    .eyebrow::before { content: ""; width: 23px; height: 3px; background: var(--coral); }
    h1 { margin: 14px 0 16px; max-width: 690px; font-size: clamp(38px, 6vw, 66px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 610px; color: #46534e; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 27px; }
    .text-link { font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 4px; }
    .hero-art { min-height: 260px; position: relative; display: grid; place-items: center; }
    .hero-stamp { position: relative; width: min(100%, 300px); aspect-ratio: 1; display: grid; place-items: center; border: 2px solid var(--ink); background: var(--yellow); transform: rotate(-5deg); box-shadow: 12px 12px 0 var(--coral); }
    .hero-stamp::before, .hero-stamp::after { content: ""; position: absolute; width: 46px; height: 46px; background: var(--blue); border: 2px solid var(--ink); border-radius: 50%; }
    .hero-stamp::before { top: 18px; right: 18px; }
    .hero-stamp::after { bottom: 19px; left: 18px; background: var(--lime); }
    .stamp-text { max-width: 220px; text-align: center; font-size: 28px; line-height: 1.25; font-weight: 900; transform: rotate(5deg); }
    .stamp-text span { display: block; margin-top: 9px; font-size: 13px; font-weight: 700; }
    .hero-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 26px; }
    .hero-tags span { border: 1px solid rgba(32,37,43,.28); border-radius: 3px; padding: 5px 10px; font-size: 12px; font-weight: 700; background: rgba(255,255,255,.5); }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: #fff; }
    .metric { padding: 24px 20px; text-align: center; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--green); font-size: 22px; }
    .metric span { display: block; color: var(--muted); font-size: 12px; margin-top: 3px; }
    section.content-section { padding-block: 76px; border-bottom: 1px solid var(--line); }
    .section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { margin: 6px 0 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p { max-width: 490px; margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: start; }
    .intro-copy { font-size: 16px; color: #49534f; }
    .intro-copy p { margin-top: 0; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; border-top: 1px solid var(--line); }
    .capability-list div { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .capability-list strong { display: block; font-size: 14px; }
    .capability-list span { color: var(--muted); font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { background: #fff; padding: 22px; border: 1px solid var(--line); border-top: 3px solid var(--green); transition: transform .22s ease, box-shadow .22s ease; }
    .service-item:nth-child(3n+2) { border-top-color: var(--coral); }
    .service-item:nth-child(3n) { border-top-color: var(--blue); }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 10px 24px rgba(31,52,42,.09); }
    .service-item h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-item .index { display: block; color: var(--green); font-size: 11px; font-weight: 800; margin-bottom: 10px; }
    .band { background: #edf2e9; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: steps; }
    .workflow article { position: relative; padding: 20px 22px 20px 0; border-top: 2px solid #b7c9ba; counter-increment: steps; }
    .workflow article::before { content: "0" counter(steps); display: grid; place-items: center; width: 34px; height: 34px; margin-top: -38px; margin-bottom: 18px; color: #fff; background: var(--green); border-radius: 50%; font-size: 12px; font-weight: 800; }
    .workflow h3 { margin: 0 0 6px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .industry { background: #fff; padding: 18px; border: 1px solid var(--line); }
    .industry strong { display: block; margin-bottom: 5px; }
    .industry span { color: var(--muted); font-size: 12px; }
    .network { display: grid; grid-template-columns: 1fr 1.3fr; gap: 40px; align-items: start; }
    .network-note { padding: 22px; background: var(--green); color: #fff; }
    .network-note h3 { margin: 0 0 8px; font-size: 20px; }
    .network-note p { margin: 0; color: #e3efe8; font-size: 14px; }
    .model-cloud { display: flex; flex-wrap: wrap; align-content: start; gap: 8px; }
    .model-cloud span { padding: 7px 11px; border: 1px solid #b8c7bc; background: #fff; color: #35443b; font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .case { background: #fff; border: 1px solid var(--line); overflow: hidden; }
    .case .image-wrap { aspect-ratio: 16/9; background: #e6ebe2; display: grid; place-items: center; }
    .case img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 17px; }
    .case-body h3 { margin: 0 0 6px; font-size: 16px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-square { aspect-ratio: 1; max-width: 100%; object-fit: cover; display: block; margin: 24px auto 0; border: 1px solid var(--line); }
    .comparison { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #edf2e9; font-size: 13px; }
    td { font-size: 13px; color: #46514b; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .score { display: flex; align-items: center; gap: 20px; margin-bottom: 18px; padding: 18px 20px; background: var(--lime); }
    .score strong { font-size: 29px; line-height: 1; }
    .stars { color: #29352d; font-size: 20px; letter-spacing: 0; }
    .score small { display: block; font-size: 12px; font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); }
    .review p { margin: 0 0 15px; color: #46514b; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: var(--muted); font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); gap: 10px; }
    .article-list a { min-height: 84px; padding: 15px; display: flex; flex-direction: column; justify-content: space-between; color: var(--ink); text-decoration: none; background: #fff; border: 1px solid var(--line); font-size: 13px; font-weight: 700; }
    .article-list a span { color: var(--green); font-size: 11px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { list-style: none; position: relative; cursor: pointer; padding: 17px 38px 17px 0; font-weight: 700; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 13px; font-size: 22px; color: var(--green); }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: -4px 35px 18px 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 38px; align-items: start; }
    .contact-info { display: grid; gap: 12px; }
    .contact-line { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
    .contact-line strong { display: block; font-size: 13px; }
    .contact-line a, .contact-line span { color: #53605a; font-size: 14px; }
    .contact-qr { width: 148px; height: auto; display: block; margin-top: 7px; border: 1px solid var(--line); }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
    .field { display: grid; gap: 5px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #c9d1ca; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .form .button { justify-self: start; }
    .footer { background: #e6ebe3; color: #26332b; padding: 27px 0; }
    .footer-inner { display: flex; align-items: start; justify-content: space-between; gap: 25px; }
    .footer p { margin: 4px 0 0; color: #53605a; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 600px; }
    .footer-links a { color: #344b3d; font-size: 12px; text-decoration-thickness: 1px; text-underline-offset: 3px; }
    .floating { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .floating a, .top-button { display: grid; place-items: center; width: 48px; height: 48px; border: 0; border-radius: 50%; background: var(--green); color: #fff; text-decoration: none; font-size: 12px; font-weight: 700; box-shadow: 0 5px 16px rgba(0,0,0,.17); cursor: pointer; }
    .top-button { background: #29352d; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 920px) {
      .header-inner { gap: 10px; }
      .nav-links { display: none; position: absolute; top: 74px; left: 0; right: 0; padding: 12px 20px 18px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 10px 20px rgba(20,35,27,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3,1fr); }
      .nav-links a { padding: 11px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .hero-inner { grid-template-columns: 1.1fr .9fr; gap: 22px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .industry-grid { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 640px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .header-inner { min-height: 66px; }
      .nav-links { top: 66px; }
      .nav-links.is-open { grid-template-columns: repeat(2,1fr); }
      .nav-cta { padding: 9px 11px; font-size: 12px; }
      .hero-inner { padding-block: 54px 42px; grid-template-columns: 1fr; }
      h1 { font-size: 43px; }
      .hero-copy { font-size: 15px; }
      .hero-art { min-height: 205px; }
      .hero-stamp { width: 194px; }
      .stamp-text { font-size: 22px; }
      .metrics { grid-template-columns: repeat(2,1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      section.content-section { padding-block: 52px; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 10px; }
      .intro-grid, .network, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
      .capability-list { grid-template-columns: 1fr 1fr; gap: 0 14px; }
      .service-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 28px 14px; }
      .workflow article { padding-right: 5px; }
      .industry-grid { grid-template-columns: 1fr 1fr; }
      .case-grid, .reviews { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .footer-inner { flex-direction: column; }
      .form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .floating { right: 10px; bottom: 12px; }
      .floating a, .top-button { width: 42px; height: 42px; }
    }