:root {
      color-scheme: light;
      --ink: #18352d;
      --muted: #587168;
      --green: #146c4b;
      --green-dark: #0d5138;
      --mint: #eaf7f0;
      --line: #d9e9e0;
      --paper: #f7fbf8;
      --white: #fff;
      --coral: #d56d50;
      --gold: #b17a24;
      --shadow: 0 14px 40px rgba(22, 72, 51, .09);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    body {
      margin: 0;
      color: var(--ink);
      background: linear-gradient(180deg, #f2faf5 0, #f8fcf9 42%, #f1f8f4 100%);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(248, 252, 249, .94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
    .header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 10px; color: #36584b; font-size: 13px; border-radius: 5px; transition: background .2s, color .2s; }
    .nav-links a:hover { color: var(--green-dark); background: #e4f3e9; }
    .nav-cta, .button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 8px; padding: 0 19px; border: 1px solid var(--green); border-radius: 5px; color: #fff; background: var(--green); font-weight: 700; transition: transform .2s, background .2s, box-shadow .2s; cursor: pointer; }
    .nav-cta:hover, .button:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(20,108,75,.18); }
    .button.secondary { background: transparent; color: var(--green-dark); }
    .button.secondary:hover { background: #e4f3e9; box-shadow: none; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: var(--white); color: var(--ink); cursor: pointer; }
    main, footer { display: block; }
    .hero { position: relative; overflow: hidden; padding: 82px 0 60px; background: linear-gradient(118deg, #e8f7ed 0%, #f6fbf7 53%, #e4f4e9 100%); border-bottom: 1px solid var(--line); }
    .hero::after { content: ""; position: absolute; width: 280px; height: 280px; right: 3%; top: 15%; border: 1px solid rgba(20,108,75,.13); border-radius: 50%; box-shadow: 0 0 0 34px rgba(20,108,75,.035), 0 0 0 72px rgba(20,108,75,.025); pointer-events: none; }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); gap: 50px; align-items: center; }
    .eyebrow { color: var(--green); font-size: 13px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 700px; margin-bottom: 20px; font-size: clamp(38px, 5vw, 64px); line-height: 1.13; }
    h1 span { color: var(--green); }
    .hero-copy { max-width: 620px; color: var(--muted); font-size: 18px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
    .hero-note { margin-top: 20px; color: #527164; font-size: 13px; }
    .prompt-panel { position: relative; padding: 25px; background: rgba(255,255,255,.82); border: 1px solid #cfe4d6; border-radius: 8px; box-shadow: var(--shadow); animation: rise .65s ease both; }
    .panel-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 700; }
    .live-mark { display: inline-flex; align-items: center; gap: 7px; color: var(--green); }
    .live-mark::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #43a977; box-shadow: 0 0 0 4px #e1f2e8; }
    .prompt-example { margin: 18px 0 20px; padding: 17px; border-left: 3px solid #61a77f; color: #36584b; background: #f1f8f3; border-radius: 0 5px 5px 0; font-size: 14px; }
    .prompt-tags { display: flex; gap: 8px; flex-wrap: wrap; }
    .prompt-tags span { padding: 5px 9px; border: 1px solid var(--line); border-radius: 4px; color: #486b5a; background: #fff; font-size: 12px; }
    .stat-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 48px; border-top: 1px solid #cfe3d6; }
    .stat { padding: 18px 20px 0 0; }
    .stat strong { display: block; color: var(--green-dark); font-size: 17px; }
    .stat span { color: var(--muted); font-size: 13px; }
    .section { padding: 74px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 30px; }
    .section-head h2 { max-width: 640px; margin-bottom: 8px; font-size: clamp(27px, 3.4vw, 39px); line-height: 1.2; }
    .section-head p { max-width: 600px; margin-bottom: 0; color: var(--muted); }
    .section-kicker { display: block; margin-bottom: 10px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    .intro-band { background: #fff; border-block: 1px solid var(--line); }
    .intro-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 55px; align-items: start; }
    .intro-layout h2 { margin-bottom: 15px; font-size: 34px; line-height: 1.2; }
    .intro-layout p { color: var(--muted); }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 28px; }
    .capability-list div { padding: 15px 0; border-top: 1px solid var(--line); }
    .capability-list strong { display: block; margin-bottom: 4px; color: var(--green-dark); }
    .capability-list span { color: var(--muted); font-size: 14px; }
    .services-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .service { padding: 21px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.76); transition: transform .22s, border-color .22s, box-shadow .22s; }
    .service:hover { transform: translateY(-4px); border-color: #9bc9aa; box-shadow: var(--shadow); }
    .service .index { display: block; margin-bottom: 13px; color: #6c9d7e; font-size: 12px; font-weight: 800; }
    .service h3 { margin-bottom: 7px; font-size: 18px; }
    .service p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .service-feature { background: #e9f5ec; }
    .workflows { background: #eff8f2; border-block: 1px solid var(--line); }
    .workflow-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 20px; counter-reset: step; }
    .workflow-step { position: relative; padding: 20px 17px 17px; border-top: 2px solid #71ad87; background: rgba(255,255,255,.7); }
    .workflow-step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 16px; color: #51936d; font-size: 13px; font-weight: 800; }
    .workflow-step h3 { margin-bottom: 7px; font-size: 17px; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; }
    .industry { padding: 17px; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    .industry strong { display: block; margin-bottom: 4px; }
    .industry span { color: var(--muted); font-size: 13px; }
    .network-band { color: #edf8f0; background: #174d39; }
    .network-band .section-kicker { color: #acd9b9; }
    .network-band .section-head p { color: #d0e5d7; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .model-cloud span { padding: 8px 12px; border: 1px solid rgba(216,243,224,.3); border-radius: 4px; color: #f1fbf3; background: rgba(255,255,255,.08); font-size: 14px; }
    .model-note { margin: 19px 0 0; color: #c5e0ce; font-size: 13px; }
    .review-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 30px; align-items: start; }
    .review-score { padding: 25px; border-left: 4px solid #72ad83; background: #e7f4eb; }
    .review-score .stars { color: var(--gold); font-size: 21px; letter-spacing: 2px; }
    .review-score strong { display: block; margin: 7px 0; color: var(--green-dark); font-size: 38px; line-height: 1.2; }
    .review-score p { margin: 0; color: var(--muted); font-size: 14px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    .comparison { width: 100%; min-width: 600px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 13px 15px; border-bottom: 1px solid #e5efe8; vertical-align: top; }
    .comparison th { color: #315747; background: #edf7f0; font-size: 13px; }
    .comparison td { font-size: 14px; }
    .comparison tr:last-child td { border-bottom: 0; }
    .comparison td:first-child { font-weight: 700; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case { overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    .case img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .case-copy { padding: 17px 19px; }
    .case-copy h3 { margin-bottom: 5px; font-size: 17px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-square img { aspect-ratio: 1 / 1; object-fit: cover; }
    .quotes { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 13px; }
    .quote { padding: 20px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    .quote p { margin-bottom: 16px; color: #3f5f51; font-size: 14px; }
    .quote strong { display: block; font-size: 14px; }
    .quote span { color: #668173; font-size: 12px; }
    .match-band { background: #e7f4eb; border-block: 1px solid var(--line); }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .match-aside h2 { margin-bottom: 13px; font-size: 34px; line-height: 1.2; }
    .match-aside p { color: var(--muted); }
    .match-aside a { color: var(--green-dark); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
    .lead-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 23px; border: 1px solid #cce2d2; border-radius: 6px; background: #fff; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #cbded1; border-radius: 4px; color: var(--ink); background: #fbfdfb; }
    .field textarea { min-height: 112px; resize: vertical; }
    .lead-form .button { grid-column: 1 / -1; justify-self: start; }
    .faq-list { max-width: 900px; margin-inline: auto; border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-question { display: flex; width: 100%; justify-content: space-between; align-items: center; gap: 20px; padding: 17px 0; border: 0; color: var(--ink); background: transparent; text-align: left; font-weight: 700; cursor: pointer; }
    .faq-question::after { content: "+"; color: var(--green); font-size: 23px; line-height: 1; }
    .faq-question[aria-expanded="true"]::after { content: "−"; }
    .faq-answer { padding: 0 35px 16px 0; color: var(--muted); font-size: 14px; }
    .faq-answer[hidden] { display: none; }
    .reference-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
    .reference-block { padding-top: 18px; border-top: 2px solid #76ad88; }
    .reference-block h3 { margin-bottom: 10px; font-size: 20px; }
    .reference-block p { color: var(--muted); font-size: 14px; }
    .token-table { width: 100%; border-collapse: collapse; }
    .token-table th, .token-table td { padding: 9px 8px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; }
    .token-table th { color: #426453; }
    .article-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 28px; border-top: 1px solid var(--line); }
    .article-list a { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--line); color: #315746; font-size: 14px; }
    .article-list a:hover { color: var(--green); }
    .article-list span { color: #759081; font-size: 12px; white-space: nowrap; }
    .footer { padding: 38px 0 22px; color: #e4f2e8; background: #143e30; }
    .footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
    .footer .brand { color: #fff; }
    .footer p, .footer small { color: #c5dfcd; }
    .footer a { color: #e4f2e8; }
    .footer a:hover { color: #a9dfb9; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 12px; font-size: 13px; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 26px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.18); }
    .contact-float { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
    .contact-float a { display: inline-flex; justify-content: center; align-items: center; min-height: 43px; padding: 0 13px; border: 1px solid #b9d8c3; border-radius: 5px; color: var(--green-dark); background: #fff; box-shadow: 0 5px 18px rgba(24,53,45,.13); font-size: 13px; font-weight: 700; }
    .contact-float a:hover { background: #e9f6ed; }
    .reveal { opacity: 0; transform: translateY(13px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
    @media (max-width: 900px) {
      .header-inner { flex-wrap: wrap; padding-block: 12px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; flex-basis: 100%; justify-content: flex-start; padding: 6px 0 3px; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 9px; }
      .hero-grid { grid-template-columns: 1fr  .85fr; gap: 25px; }
      .services-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .industry-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .workflow-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    }
    @media (max-width: 650px) {
      .container { width: min(100% - 32px, 1160px); }
      .header-inner { min-height: 62px; }
      .hero { padding: 55px 0 36px; }
      .hero::after { width: 160px; height: 160px; right: -60px; top: 5%; }
      .hero-grid, .intro-layout, .review-wrap, .match-grid, .reference-grid, .footer-main { grid-template-columns: 1fr; }
      .hero-grid { gap: 28px; }
      .hero-copy { font-size: 16px; }
      .stat-strip { margin-top: 30px; }
      .stat { padding-right: 8px; }
      .stat strong { font-size: 15px; }
      .section { padding: 54px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 10px; }
      .intro-layout { gap: 15px; }
      .services-grid, .quotes { grid-template-columns: 1fr; }
      .service { padding: 18px; }
      .workflow-grid { gap: 10px; }
      .case-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr; }
      .lead-form { grid-template-columns: 1fr; padding: 18px; }
      .field.full, .lead-form .button { grid-column: auto; }
      .footer-bottom { flex-direction: column; gap: 5px; }
      .contact-float { right: 10px; bottom: 10px; }
      .contact-float a { min-height: 39px; padding-inline: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }