:root {
      color-scheme: light;
      --ink: #182522;
      --muted: #53645f;
      --green: #12785b;
      --green-dark: #07543f;
      --lime: #d8f263;
      --paper: #f5f8f6;
      --white: #fff;
      --line: #dce6df;
      --coral: #e96f50;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { display: block; 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(255,255,255,.96); border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { width: 38px; height: auto; }
    .brand-name { font-size: 17px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; min-width: 0; }
    .nav-links a { padding: 10px 8px; color: #344540; font-size: 13px; white-space: nowrap; }
    .nav-links a:hover { color: var(--green); }
    .nav-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .nav-home { color: var(--green-dark); font-size: 14px; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: 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: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 5px;
      background: var(--green); color: white; font-weight: 700; transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
    }
    .button:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 9px 20px rgba(18,120,91,.18); }
    .button-light { background: white; color: var(--green-dark); border-color: #bfd5c8; }
    .button-light:hover { background: #edf6ef; color: var(--green-dark); }
    .hero {
      position: relative; overflow: hidden; color: var(--ink);
      background: linear-gradient(115deg, #eff9ef 0%, #e4f4e8 49%, #f5f8d9 100%);
      border-bottom: 1px solid #d8e8d8;
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before {
      right: max(4%, calc((100vw - var(--container))/2)); top: 46px; width: 290px; aspect-ratio: 1;
      border: 1px solid rgba(18,120,91,.22); border-radius: 50%;
      box-shadow: 0 0 0 24px rgba(18,120,91,.035), 0 0 0 52px rgba(18,120,91,.025);
      animation: breathe 7s ease-in-out infinite;
    }
    .hero::after { right: 13%; top: 147px; width: 13px; height: 13px; background: var(--coral); border-radius: 50%; }
    .hero-inner { position: relative; z-index: 1; padding-block: 84px 70px; }
    .hero-copy { max-width: 750px; }
    .eyebrow { color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    h1 { max-width: 720px; margin: 14px 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.15; letter-spacing: 0; }
    .hero p { max-width: 660px; margin: 0; color: #42564d; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
    .hero-note { margin-top: 17px; color: #53645f; font-size: 13px; }
    .hero-ribbon { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 34px; }
    .hero-ribbon span { border: 1px solid #c5ddcb; background: rgba(255,255,255,.55); padding: 7px 12px; color: #365348; font-size: 13px; }
    .section { padding-block: 76px; }
    .section-white { background: var(--white); }
    .section-tint { background: #edf5ef; }
    .section-head { max-width: 700px; margin-bottom: 32px; }
    .section-kicker { color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
    h2 { margin: 7px 0 10px; font-size: clamp(28px, 3.5vw, 39px); line-height: 1.2; letter-spacing: 0; }
    h3 { margin: 0 0 8px; font-size: 19px; line-height: 1.35; letter-spacing: 0; }
    .section-head p, .lead { color: var(--muted); margin: 0; }
    .metric-row { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); background: white; }
    .metric { padding: 25px 20px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 25px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; align-items: start; }
    .intro-copy p { color: var(--muted); }
    .intro-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 22px; margin: 22px 0 0; padding: 0; list-style: none; }
    .intro-list li { padding: 11px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .intro-list li::before { content: "＋"; color: var(--green); margin-right: 9px; }
    .quote-panel { padding: 28px; background: var(--green-dark); color: white; border-radius: 5px; }
    .quote-panel p { color: #e2f1e7; margin: 0 0 15px; }
    .quote-panel strong { color: var(--lime); font-size: 24px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service-item { background: white; padding: 24px; transition: background .2s ease; }
    .service-item:hover { background: #f4faf5; }
    .service-no { display: block; margin-bottom: 18px; color: var(--green); font-size: 13px; font-weight: 800; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .model-line { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .model-line span { padding: 6px 10px; background: #e7f1e9; color: #315044; font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: flow; }
    .workflow article { position: relative; padding: 22px 18px 18px 0; border-top: 2px solid #8db5a1; counter-increment: flow; }
    .workflow article::before { content: "0" counter(flow); display: block; margin-bottom: 18px; color: var(--green); font-size: 14px; font-weight: 800; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 24px; }
    .industry { padding: 20px 0; border-bottom: 1px solid var(--line); }
    .industry h3 { font-size: 16px; }
    .industry p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-band { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; padding: 34px; background: #e5f1e7; border-left: 4px solid var(--green); }
    .network-band p { margin: 0; color: var(--muted); }
    .network-tags { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-tags span { padding: 8px 12px; background: white; color: #315044; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .case { display: grid; grid-template-columns: minmax(130px, .62fr) 1fr; align-items: center; gap: 20px; padding: 18px; background: white; border: 1px solid var(--line); }
    .case .media { overflow: hidden; background: #eef3ef; }
    .case .media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .review { padding: 22px; background: white; border-top: 3px solid #8db5a1; }
    .review p { margin: 0 0 17px; color: #35463f; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    .comparison { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid var(--line); }
    .comparison th { background: #e8f3e9; color: #204538; font-size: 14px; }
    .comparison td { color: #43534d; font-size: 14px; }
    .comparison td:first-child { color: var(--ink); font-weight: 700; }
    .rating-line { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-bottom: 22px; }
    .rating-score { color: var(--green-dark); font-size: 36px; font-weight: 850; }
    .stars { color: #c77920; letter-spacing: 0; font-size: 21px; }
    .rating-caption { color: var(--muted); font-size: 13px; }
    .fit-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .fit-points { margin: 18px 0 0; padding-left: 19px; color: var(--muted); }
    .fit-points li { padding: 5px 0; }
    .reference-box { padding: 24px; background: #f4f8f4; border: 1px solid var(--line); }
    .reference-box p { margin: 0 0 16px; color: var(--muted); }
    .reference-box .button { margin-top: 16px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { display: flex; justify-content: space-between; gap: 20px; padding: 17px 4px; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; color: var(--green); font-size: 20px; line-height: 1; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { max-width: 850px; margin: 0; padding: 0 32px 18px 4px; color: var(--muted); }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
    .article-link { display: flex; min-height: 100px; flex-direction: column; justify-content: space-between; padding: 16px; background: white; border: 1px solid var(--line); }
    .article-link:hover { border-color: #83ad95; }
    .article-link span { color: var(--muted); font-size: 12px; }
    .article-link strong { font-size: 14px; }
    .form-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 48px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: var(--green-dark); font-weight: 700; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-wide { 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 #cbd8cf; border-radius: 4px; background: white; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-form .button { justify-self: start; cursor: pointer; }
    .join-band { display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 26px 0 0; border-top: 1px solid var(--line); }
    .join-band p { margin: 6px 0 0; color: var(--muted); }
    .site-footer { background: #e8efea; color: #263b32; border-top: 1px solid #d4e0d6; }
    .footer-main { display: grid; grid-template-columns: 1.2fr 1fr; gap: 42px; padding-block: 30px; }
    .footer-links { display: flex; flex-wrap: wrap; align-content: start; gap: 8px 18px; }
    .footer-links a { color: #315044; font-size: 13px; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 13px; border-top: 1px solid #d1ddd4; color: #506159; font-size: 12px; }
    .float-tools { position: fixed; z-index: 15; right: 16px; bottom: 20px; display: grid; gap: 8px; }
    .float-tools a, .float-tools button { display: grid; place-items: center; width: 46px; min-height: 46px; padding: 5px; border: 1px solid #b8cec0; background: white; color: var(--green-dark); text-align: center; font-size: 11px; cursor: pointer; }
    .float-tools img { width: 170px; }
    .qr-pop { position: absolute; right: 55px; bottom: 0; display: none; width: 190px; padding: 10px; background: white; border: 1px solid var(--line); box-shadow: 0 8px 28px rgba(20,40,30,.16); }
    .qr-pop p { margin: 6px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
    .float-tools .qr-trigger:hover + .qr-pop, .float-tools .qr-pop:hover { display: block; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes breathe { 0%,100% { transform: scale(1); opacity: .7; } 50% { transform: scale(1.045); opacity: 1; } }
    @media (max-width: 1050px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .nav-links a:nth-child(n+7) { display: none; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 6px; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 8px 16px 16px; background: white; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
      .nav-links.is-open { display: flex; }
      .nav-links a, .nav-links a:nth-child(n+7) { display: block; padding: 9px 4px; font-size: 14px; border-bottom: 1px solid #eef2ef; }
      .nav-actions { gap: 10px; }
      .nav-actions .button { display: none; }
      .hero-inner { padding-block: 62px 48px; }
      .hero::before { right: -90px; top: 160px; width: 230px; opacity: .55; }
      .hero::after { right: 11%; top: 215px; }
      .hero p { font-size: 16px; }
      .section { padding-block: 55px; }
      .metric-row { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .intro-grid, .fit-layout, .form-layout { grid-template-columns: 1fr; gap: 28px; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 10px 18px; }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .network-band { grid-template-columns: 1fr; gap: 20px; padding: 24px; }
      .case-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(2, 1fr); }
      .footer-main { grid-template-columns: 1fr; gap: 18px; }
    }
    @media (max-width: 480px) {
      .brand-name { font-size: 15px; }
      .nav-home { font-size: 13px; }
      h1 { font-size: 38px; }
      .hero-actions .button { width: 100%; }
      .metric { padding: 18px 13px; }
      .metric strong { font-size: 22px; }
      .intro-list { grid-template-columns: 1fr; }
      .service-grid, .review-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .case { grid-template-columns: 1fr; }
      .case .media img { aspect-ratio: 16 / 9; }
      .contact-form { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .footer-bottom { flex-direction: column; gap: 4px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }