:root {
      color-scheme: light;
      --ink: #18251d;
      --muted: #5e6b62;
      --green: #286b3d;
      --green-dark: #194b2b;
      --lime: #d5f36a;
      --line: #dce6dc;
      --paper: #f6faf5;
      --white: #fff;
      --orange: #ef8b48;
      --content: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    img { max-width: 100%; height: auto; }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--content), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(246,250,245,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 42px; height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #334139; 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;
      min-height: 44px;
      padding: 10px 18px;
      border: 1px solid var(--green);
      background: var(--green);
      color: #fff;
      font-weight: 700;
      text-decoration: none;
      cursor: pointer;
      transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    .nav-cta { white-space: nowrap; }
    .button:hover, .nav-cta:hover { background: var(--green-dark); box-shadow: 0 8px 20px rgba(40,107,61,.18); transform: translateY(-2px); }
    .button.secondary { background: transparent; color: var(--green-dark); }
    .button.secondary:hover { background: #eaf4e7; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); padding: 8px 12px; cursor: pointer; }
    .hero {
      overflow: hidden;
      background: #e9f5e3;
      border-bottom: 1px solid #d8e9d0;
    }
    .hero-inner { padding-block: 76px 62px; }
    .hero-copy { max-width: 810px; }
    .eyebrow { margin: 0 0 14px; color: var(--green); font-weight: 800; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
    h1 { max-width: 760px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.08; letter-spacing: 0; }
    .hero-lead { max-width: 680px; margin: 22px 0 0; color: #45564a; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-notes { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 26px; color: #415444; font-size: 14px; }
    .hero-notes span::before { content: "✓"; color: var(--green); font-weight: 900; margin-right: 8px; }
    .hero-mark { display: flex; gap: 8px; margin-top: 48px; }
    .hero-mark i { display: block; width: 42px; height: 6px; background: var(--green); }
    .hero-mark i:nth-child(2) { width: 78px; background: var(--lime); }
    .hero-mark i:nth-child(3) { width: 20px; background: var(--orange); }
    .metric-band { background: var(--green-dark); color: #fff; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); padding-block: 22px; }
    .metric { padding: 8px 22px; border-right: 1px solid rgba(255,255,255,.2); }
    .metric:first-child { padding-left: 0; }
    .metric:last-child { border: 0; }
    .metric strong { display: block; color: var(--lime); font-size: 23px; line-height: 1.25; }
    .metric span { color: #e6f0e6; font-size: 13px; }
    .section { padding-block: 76px; }
    .section.tint { background: #edf5e9; border-block: 1px solid #e0eadb; }
    .section-head { max-width: 720px; margin-bottom: 32px; }
    .section-head h2 { margin: 0 0 10px; font-size: 34px; line-height: 1.2; letter-spacing: 0; }
    .section-head p { margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
    .intro-copy p { margin: 0 0 16px; color: #425047; }
    .intro-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 22px 0 0; padding: 0; list-style: none; }
    .intro-list li { padding: 12px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .intro-list li::before { content: "↗"; margin-right: 10px; color: var(--green); }
    .media-stack { display: grid; gap: 14px; }
    .media-frame { overflow: hidden; border: 1px solid var(--line); background: #fff; }
    .media-frame img { display: block; width: 100%; height: auto; }
    .media-caption { margin: 0; padding: 10px 14px; color: var(--muted); font-size: 13px; }
    .capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 28px; border-top: 1px solid var(--line); }
    .capability { padding: 23px 0 25px; border-bottom: 1px solid var(--line); }
    .capability h3 { margin: 0 0 7px; font-size: 18px; }
    .capability p { margin: 0; color: var(--muted); font-size: 14px; }
    .capability .index { display: inline-block; margin-bottom: 10px; color: var(--green); font-size: 12px; font-weight: 800; }
    .platform-strip { margin-top: 30px; padding: 22px; border-left: 4px solid var(--green); background: #e9f2e5; }
    .platform-strip strong { display: block; margin-bottom: 10px; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-list span { padding: 5px 10px; border: 1px solid #cfdfc9; background: #fff; color: #324637; font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
    .workflow article { padding-top: 16px; border-top: 2px solid var(--green); }
    .workflow article::before { counter-increment: step; content: "0" counter(step); color: var(--green); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 8px 0 6px; font-size: 18px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .solutions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 44px; }
    .solution-group { border-top: 2px solid var(--green); padding-top: 16px; }
    .solution-group h3 { margin: 0 0 12px; font-size: 19px; }
    .solution-group p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-group ul { margin: 12px 0 0; padding-left: 19px; color: #34453a; font-size: 14px; }
    .solution-group li + li { margin-top: 5px; }
    .review-score { display: flex; align-items: center; gap: 24px; margin-bottom: 28px; padding: 20px 24px; background: var(--green-dark); color: #fff; }
    .review-score strong { color: var(--lime); font-size: 38px; line-height: 1; }
    .review-score span { display: block; color: #e5f0e2; font-size: 13px; }
    .stars { color: var(--lime); letter-spacing: 0; font-size: 20px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 690px; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    th { background: #eaf3e6; color: #263b2b; font-size: 14px; }
    td { color: #405047; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px 30px; }
    .review { padding: 20px 0; border-top: 2px solid var(--green); }
    .review blockquote { margin: 0; color: #35463b; }
    .review p { margin: 0 0 14px; }
    .review footer { color: var(--muted); font-size: 13px; }
    .case-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
    .case-layout figure { margin: 0; }
    .case-layout .media-frame { margin-bottom: 12px; }
    .case-layout figcaption { color: var(--muted); font-size: 14px; }
    .case-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
    .case-list li { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
    .case-list strong { font-size: 15px; }
    .case-list span { color: var(--muted); font-size: 13px; text-align: right; }
    .news-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
    .news-links a { min-height: 106px; display: flex; align-items: flex-end; padding: 15px; border-bottom: 2px solid var(--green); background: #eaf3e6; text-decoration: none; font-weight: 700; }
    .news-links a:hover { background: #dcebd5; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 700; 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: 23px; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 820px; margin: 0 0 18px; color: var(--muted); }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-details { display: grid; gap: 0; border-top: 1px solid var(--line); }
    .contact-row { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .contact-row strong { display: block; font-size: 14px; }
    .contact-row span, .contact-row a { color: var(--muted); font-size: 14px; }
    .qr-wrap { width: 150px; margin-top: 18px; padding: 8px; border: 1px solid var(--line); background: #fff; }
    .qr-wrap img { display: block; width: 100%; height: auto; }
    .contact-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .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%; border: 1px solid #cbd8cb; border-radius: 0; background: #fff; color: var(--ink); padding: 11px 12px; }
    .field textarea { min-height: 120px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .footer { background: #e8f0e5; color: #26382b; border-top: 1px solid #d3e1ce; }
    .footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 24px; padding-block: 28px; align-items: start; }
    .footer p { margin: 4px 0; color: #536357; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 16px; }
    .footer-links a { color: #304836; font-size: 13px; text-decoration-color: #9daf9e; text-underline-offset: 3px; }
    .copyright { grid-column: 1 / -1; padding-top: 14px; border-top: 1px solid #d1dfcd; color: #58695c; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { display: grid; place-items: center; width: 48px; height: 48px; background: var(--green-dark); color: #fff; font-size: 12px; font-weight: 700; text-decoration: none; box-shadow: 0 5px 16px rgba(19,53,28,.2); }
    .float-contact a:hover { background: var(--green); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 920px) {
      .header-inner { flex-wrap: wrap; padding-block: 12px; }
      .menu-toggle { display: inline-flex; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; flex-basis: 100%; justify-content: flex-start; padding-bottom: 8px; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 12px 8px 0; margin-right: 14px; }
      .capability-grid { grid-template-columns: repeat(2, 1fr); }
      .news-links { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--content), calc(100% - 32px)); }
      .header-inner { gap: 10px; }
      .brand { font-size: 14px; }
      .ai-page-logo { width: 36px; height: 36px; }
      .nav-cta { min-height: 38px; padding: 7px 10px; font-size: 13px; }
      .nav-links a { font-size: 13px; }
      .hero-inner { padding-block: 54px 44px; }
      .hero-lead { font-size: 16px; }
      .metrics { grid-template-columns: repeat(2, 1fr); gap: 12px 0; }
      .metric { padding: 7px 12px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:first-child { padding-left: 12px; }
      .section { padding-block: 54px; }
      .section-head h2 { font-size: 28px; }
      .intro-grid, .case-layout, .contact-grid { grid-template-columns: 1fr; gap: 26px; }
      .intro-list { grid-template-columns: 1fr; }
      .capability-grid, .solutions, .reviews { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 22px; }
      .news-links { grid-template-columns: repeat(2, 1fr); }
      .review-score { gap: 14px; padding: 17px; }
      .review-score strong { font-size: 32px; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .footer-inner { grid-template-columns: 1fr; }
      .footer-links { justify-content: flex-start; }
      .copyright { grid-column: auto; }
      .float-contact { right: 10px; bottom: 12px; }
      .float-contact a { width: 42px; height: 42px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }