:root {
      color-scheme: light;
      --ink: #18221d;
      --muted: #59675f;
      --green: #217a48;
      --green-dark: #145b35;
      --lime: #c9f26a;
      --paper: #f5f8f1;
      --line: #dce6d8;
      --white: #fff;
      --blue: #dff2ee;
      --orange: #f0a34b;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      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; }
    img { 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);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; text-decoration: none; }
    .ai-page-logo { display: block; width: 152px; max-height: 48px; object-fit: contain; }
    .nav-right { display: flex; align-items: center; justify-content: flex-end; gap: 20px; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 10px;
      color: #38443d;
      font-size: 13px;
      text-decoration: none;
      white-space: nowrap;
    }
    .nav-links a:hover { color: var(--green); }
    .nav-cta, .button {
      display: inline-flex;
      min-height: 44px;
      align-items: center;
      justify-content: center;
      padding: 10px 18px;
      border: 0;
      border-radius: 5px;
      color: #fff;
      background: var(--green);
      font-weight: 700;
      text-decoration: none;
      transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    .nav-cta:hover, .button:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: 0 7px 18px rgba(20,91,53,.18); }
    .button.light { color: var(--green-dark); background: #fff; }
    .button.outline { color: var(--green-dark); background: transparent; border: 1px solid #8bb99b; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; color: var(--ink); background: #fff; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      background: var(--green);
      color: #fff;
    }
    .hero::before, .hero::after {
      position: absolute;
      content: "";
      pointer-events: none;
      border: 1px solid rgba(255,255,255,.18);
      transform: rotate(35deg);
    }
    .hero::before { width: 390px; height: 390px; right: 2%; top: -200px; border-radius: 44px; }
    .hero::after { width: 260px; height: 260px; right: 12%; bottom: -190px; border-radius: 50%; }
    .hero-inner { position: relative; z-index: 1; padding-block: 82px 68px; }
    .hero-copy { max-width: 780px; }
    .eyebrow { margin: 0 0 14px; color: var(--lime); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
    h1 { max-width: 720px; margin: 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; }
    .hero-copy > p:not(.eyebrow) { max-width: 650px; margin: 22px 0 0; color: #e5f5e9; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
    .hero-note { margin-top: 25px; color: #d7ecdc; font-size: 13px; }
    .hero-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; max-width: 780px; margin-top: 52px; border-top: 1px solid rgba(255,255,255,.3); }
    .hero-metric { padding: 20px 18px 0 0; }
    .hero-metric + .hero-metric { padding-left: 20px; border-left: 1px solid rgba(255,255,255,.3); }
    .hero-metric strong { display: block; color: var(--lime); font-size: 22px; }
    .hero-metric span { color: #e3f0e6; font-size: 13px; }
    .section { padding: 76px 0; }
    .section.alt { background: #eaf2e7; }
    .section.dark-band { color: #fff; background: #20392c; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .kicker { margin: 0 0 8px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    .dark-band .kicker { color: var(--lime); }
    h2 { margin: 0; font-size: 34px; line-height: 1.25; }
    .section-intro { margin: 12px 0 0; color: var(--muted); max-width: 740px; }
    .dark-band .section-intro { color: #d2e1d5; }
    .text-link { color: var(--green-dark); font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 4px; }
    .grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
    .feature, .quote, .case, .service {
      border: 1px solid var(--line);
      background: #fff;
    }
    .feature { padding: 22px; border-radius: 4px; }
    .feature h3, .service h3, .case h3, .quote h3 { margin: 0 0 8px; font-size: 18px; }
    .feature p, .service p, .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .number-label { display: block; margin-bottom: 13px; color: var(--green); font-size: 12px; font-weight: 800; }
    .platform-strip { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .platform-strip span, .tag {
      display: inline-flex;
      padding: 6px 10px;
      border: 1px solid #cbdcc9;
      border-radius: 3px;
      color: #334a3b;
      background: #f8fbf6;
      font-size: 12px;
    }
    .service { display: flex; flex-direction: column; min-height: 164px; padding: 18px; border-radius: 4px; transition: transform .2s ease, box-shadow .2s ease; }
    .service:hover, .quote:hover, .case:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(28,63,41,.08); }
    .service .tag { align-self: flex-start; margin-bottom: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid #bad0bb; }
    .step { position: relative; padding: 24px 20px 0 0; }
    .step strong { display: block; margin-bottom: 8px; color: var(--green-dark); font-size: 17px; }
    .step span { color: var(--muted); font-size: 14px; }
    .step::before { position: absolute; top: -6px; left: 0; width: 11px; height: 11px; border: 2px solid #eaf2e7; border-radius: 50%; background: var(--green); content: ""; }
    .case { overflow: hidden; border-radius: 4px; transition: transform .2s ease, box-shadow .2s ease; }
    .media-frame { overflow: hidden; aspect-ratio: 16 / 9; background: #dce8dc; }
    .media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 18px; }
    .case-copy .tag { margin-bottom: 10px; }
    .score-panel { display: grid; grid-template-columns: .85fr 1.15fr; gap: 28px; align-items: center; padding: 28px; border: 1px solid #c8dcc9; background: #fff; }
    .score { padding: 8px 22px 8px 0; border-right: 1px solid var(--line); }
    .score strong { display: block; color: var(--green); font-size: 52px; line-height: 1; }
    .score span { display: block; margin-top: 10px; color: var(--muted); }
    .stars { margin-top: 12px; color: #d77b1d; letter-spacing: 2px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 680px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid #e6ece4; vertical-align: top; }
    th { color: #20392c; background: #edf4e9; font-size: 13px; }
    td { color: #47564b; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 30px; align-items: start; }
    .match-list { padding: 0; margin: 18px 0 0; list-style: none; }
    .match-list li { padding: 11px 0; border-bottom: 1px solid var(--line); color: #405047; }
    .match-list li::before { margin-right: 10px; color: var(--green); content: "✓"; font-weight: 800; }
    .form-panel { padding: 24px; border: 1px solid var(--line); background: #fff; }
    .form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #344238; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea {
      width: 100%;
      padding: 11px 12px;
      border: 1px solid #cbd6ca;
      border-radius: 3px;
      color: var(--ink);
      background: #fff;
    }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #9bd19c; outline-offset: 1px; }
    .form-submit { margin-top: 17px; cursor: pointer; }
    .quote { padding: 20px; border-radius: 4px; transition: transform .2s ease, box-shadow .2s ease; }
    .quote blockquote { margin: 0; color: #425047; font-size: 14px; }
    .quote cite { display: block; margin-top: 15px; color: var(--green-dark); font-size: 13px; font-style: normal; font-weight: 700; }
    .stars-small { color: #d77b1d; letter-spacing: 2px; font-size: 13px; }
    .faq-list { border-top: 1px solid #c8d7c6; }
    .faq-list details { border-bottom: 1px solid #c8d7c6; }
    .faq-list summary { position: relative; padding: 17px 32px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { position: absolute; right: 4px; content: "+"; color: var(--green); font-size: 22px; line-height: 1; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { max-width: 800px; margin: 0 0 18px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; border-top: 1px solid var(--line); }
    .article-item { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 15px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
    .article-item:hover .article-title { color: var(--green); }
    .article-title { color: #29382e; font-weight: 700; }
    .article-meta { flex: 0 0 auto; color: #78847b; font-size: 12px; }
    .contact-band { display: grid; grid-template-columns: 1.2fr .8fr; gap: 30px; align-items: center; padding: 28px; color: #fff; background: var(--green-dark); }
    .contact-band h2 { font-size: 28px; }
    .contact-band p { margin: 10px 0 0; color: #d7e9db; }
    .contact-details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; color: #eef8ef; font-size: 14px; }
    .contact-details strong { display: block; color: var(--lime); font-size: 12px; }
    .qr { display: block; width: 116px; margin-top: 14px; border: 4px solid #fff; }
    .partners { display: flex; flex-wrap: wrap; gap: 10px 20px; padding-top: 18px; }
    .partners a { color: #d7e9db; font-size: 13px; text-underline-offset: 3px; }
    .site-footer { padding: 24px 0; color: #3b4b40; background: #e2ebe0; border-top: 1px solid #cfdbcc; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .footer-row p { margin: 0; font-size: 13px; }
    .footer-row a { color: var(--green-dark); }
    .float-contact, .back-top {
      position: fixed;
      z-index: 15;
      right: 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 10px 14px;
      border: 1px solid #bbd3bf;
      border-radius: 4px;
      color: var(--green-dark);
      background: #fff;
      box-shadow: 0 4px 16px rgba(23,57,35,.12);
      text-decoration: none;
      font-size: 13px;
      font-weight: 700;
    }
    .float-contact { bottom: 76px; }
    .back-top { right: 20px; bottom: 20px; cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.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: 1080px) {
      .nav { gap: 12px; }
      .nav-right { gap: 8px; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .grid-4 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    }
    @media (max-width: 820px) {
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
      .nav-right { position: relative; }
      .nav-links {
        position: absolute;
        top: calc(100% + 12px);
        right: 0;
        display: none;
        width: min(340px, calc(100vw - 32px));
        max-height: 75vh;
        overflow-y: auto;
        align-items: stretch;
        flex-direction: column;
        padding: 10px;
        border: 1px solid var(--line);
        background: #fff;
        box-shadow: 0 12px 28px rgba(22,48,30,.12);
      }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px 12px; font-size: 14px; }
      .nav-cta { min-height: 40px; padding: 8px 12px; font-size: 13px; }
      .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .workflow { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 22px; border-top: 0; }
      .step { border-top: 1px solid #bad0bb; }
      .step::before { top: -6px; }
      .match-layout, .score-panel { grid-template-columns: 1fr; }
      .score { border-right: 0; border-bottom: 1px solid var(--line); padding: 0 0 20px; }
      .contact-band { grid-template-columns: 1fr; }
    }
    @media (max-width: 600px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .nav { min-height: 66px; }
      .ai-page-logo { width: 128px; }
      .nav-cta { display: none; }
      .hero-inner { padding-block: 62px 48px; }
      h1 { font-size: 42px; }
      .hero-copy > p:not(.eyebrow) { font-size: 16px; }
      .hero-metrics { margin-top: 38px; }
      .hero-metric { padding-right: 9px; }
      .hero-metric + .hero-metric { padding-left: 10px; }
      .hero-metric strong { font-size: 18px; }
      .hero-metric span { font-size: 11px; }
      .section { padding: 56px 0; }
      .section-head { align-items: flex-start; flex-direction: column; margin-bottom: 22px; }
      h2 { font-size: 29px; }
      .grid-2, .grid-3, .grid-4, .article-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr; gap: 0; }
      .step { padding: 20px 0 0 16px; }
      .step::before { left: 0; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .contact-band { padding: 22px; }
      .contact-details { grid-template-columns: 1fr 1fr; }
      .footer-row { align-items: flex-start; flex-direction: column; gap: 8px; }
      .float-contact, .back-top { right: 12px; }
    }