:root {
      color-scheme: light;
      --ink: #173130;
      --muted: #586d6b;
      --line: #dce9e6;
      --paper: #f5fbfa;
      --white: #fff;
      --green: #087f69;
      --green-dark: #075e50;
      --lime: #c9f36c;
      --coral: #f07c5b;
      --blue: #dff3f4;
      --shadow: 0 12px 34px rgba(20, 70, 62, .09);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    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; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid rgba(220,233,230,.9);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #385452; font-size: 13px; text-decoration: none; white-space: nowrap; border-radius: 5px; }
    .nav-links a:hover { background: #e8f5f1; color: var(--green-dark); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 44px; padding: 10px 18px; border: 0; border-radius: 5px;
      background: var(--green); color: #fff; font-weight: 750; text-decoration: none;
      transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
    }
    .nav-cta { white-space: nowrap; }
    .button:hover, .nav-cta:hover { background: var(--green-dark); box-shadow: 0 8px 18px rgba(8,127,105,.2); transform: translateY(-2px); }
    .button.secondary { background: #fff; color: var(--green-dark); border: 1px solid #bddbd2; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); }
    .menu-toggle span, .menu-toggle::before, .menu-toggle::after { display: block; width: 18px; height: 2px; margin: 4px auto; background: currentColor; content: ""; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 52px; background: linear-gradient(120deg,#e6f7f1 0%,#f7fcf7 50%,#fff7e9 100%); }
    .hero::before { position: absolute; top: -150px; right: -60px; width: 460px; height: 460px; border: 1px solid rgba(8,127,105,.15); border-radius: 50%; content: ""; }
    .hero::after { position: absolute; top: -92px; right: 0; width: 300px; height: 300px; border: 1px solid rgba(240,124,91,.18); border-radius: 50%; content: ""; }
    .hero-inner { position: relative; z-index: 1; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); content: ""; }
    h1 { max-width: 760px; margin: 15px 0 18px; font-size: clamp(38px, 6vw, 66px); line-height: 1.1; letter-spacing: 0; }
    .hero-copy { max-width: 670px; margin: 0; color: #496461; font-size: 18px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
    .hero-foot { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 30px; color: #43615c; font-size: 13px; }
    .hero-foot span { display: inline-flex; align-items: center; gap: 8px; }
    .hero-foot span::before { width: 6px; height: 6px; border-radius: 50%; background: var(--green); content: ""; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 42px; }
    .metric { padding: 18px 20px; background: rgba(255,255,255,.82); border-top: 3px solid var(--green); }
    .metric strong { display: block; font-size: 21px; line-height: 1.3; }
    .metric span { color: var(--muted); font-size: 13px; }
    main section { padding: 68px 0; }
    .section-head { max-width: 720px; margin-bottom: 28px; }
    .section-head h2 { margin: 8px 0 10px; font-size: clamp(27px, 4vw, 38px); line-height: 1.2; }
    .section-head p { margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
    .intro-copy { color: var(--muted); }
    .intro-copy p:first-child { margin-top: 0; }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .feature-list li { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .feature-list strong { display: block; margin-bottom: 3px; color: var(--ink); }
    .feature-list span { color: var(--muted); font-size: 14px; }
    .service-section { background: #eaf6f2; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service { min-height: 150px; padding: 21px; background: var(--white); border: 1px solid #dcebe5; transition: transform .2s ease, box-shadow .2s ease; }
    .service:hover, .quote:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
    .service-index { color: var(--green); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 8px 0 6px; font-size: 19px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 1px solid #a9cbc1; }
    .flow-step { position: relative; padding: 22px 16px 0 0; }
    .flow-step::before { position: absolute; top: -6px; left: 0; width: 11px; height: 11px; border: 2px solid var(--paper); border-radius: 50%; background: var(--green); content: ""; }
    .flow-step strong { display: block; margin-bottom: 5px; }
    .flow-step span { color: var(--muted); font-size: 14px; }
    .industry { background: #fff; }
    .industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 50px; align-items: start; }
    .industry-copy p { margin: 0; color: var(--muted); }
    .tag-list { display: flex; flex-wrap: wrap; gap: 9px; }
    .tag-list span { padding: 7px 11px; border: 1px solid #d5e7e1; background: #f4faf7; color: #325953; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { padding: 0 0 18px; border-bottom: 2px solid #d8e8e3; }
    .case .image-wrap { overflow: hidden; margin-bottom: 14px; background: #e9f1ed; aspect-ratio: 16 / 9; }
    .case img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case h3 { margin: 0 0 5px; font-size: 18px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .review-section { background: #f0f8f6; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 20px; background: #fff; border-left: 3px solid var(--lime); transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { margin: 0 0 14px; color: #405a56; }
    .quote strong { font-size: 14px; }
    .quote span { display: block; color: var(--muted); font-size: 12px; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); }
    th { background: #eaf6f2; color: var(--green-dark); font-size: 14px; }
    td { font-size: 14px; }
    .score-band { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 20px; padding: 22px 24px; background: #163d36; color: #fff; }
    .score-band strong { display: block; font-size: 27px; }
    .score-band span { color: #d7eee5; }
    .stars { color: var(--lime); font-size: 21px; white-space: nowrap; }
    .price-row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); }
    .price-row h3 { margin: 0 0 4px; font-size: 18px; }
    .price-row p { margin: 0; color: var(--muted); font-size: 14px; }
    .price-row .button { white-space: nowrap; }
    .faq-section { background: #fff; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; }
    details { padding: 14px 0; border-bottom: 1px solid var(--line); }
    summary { cursor: pointer; font-weight: 750; }
    details p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
    .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .article { padding: 19px; background: #fff; border: 1px solid var(--line); }
    .article span { color: var(--green); font-size: 12px; font-weight: 800; }
    .article h3 { margin: 8px 0; font-size: 18px; }
    .article p { margin: 0; color: var(--muted); font-size: 14px; }
    .contact-section { background: #e9f5f1; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 52px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-details { display: grid; gap: 9px; margin-top: 20px; }
    .contact-details a { color: var(--green-dark); font-weight: 700; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; background: #fff; border: 1px solid #d6e8e1; }
    form label { display: grid; gap: 6px; color: #385451; font-size: 13px; font-weight: 700; }
    form label.full, form button, .form-note { grid-column: 1 / -1; }
    input, select, textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cbded7; border-radius: 3px; background: #fff; color: var(--ink); }
    textarea { min-height: 105px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid #8ccfbc; outline-offset: 1px; }
    .form-note { margin: -4px 0 0; color: var(--muted); font-size: 12px; }
    .affiliate { padding: 28px 0; background: #dff1e9; }
    .affiliate-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .affiliate-row h2 { margin: 0 0 5px; font-size: 23px; }
    .affiliate-row p { margin: 0; color: var(--muted); }
    .site-footer { padding: 27px 0; background: #173d37; color: #edf8f3; }
    .footer-top { display: flex; justify-content: space-between; gap: 30px; align-items: start; }
    .site-footer p { margin: 5px 0; color: #d1e6dd; font-size: 13px; }
    .footer-links { display: flex; gap: 8px 18px; flex-wrap: wrap; max-width: 580px; }
    .footer-links a { color: #eff9f4; font-size: 13px; }
    .copyright { margin-top: 18px !important; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.18); }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-contact a, .to-top { display: grid; place-items: center; width: 48px; height: 48px; border: 0; border-radius: 50%; background: var(--green-dark); color: #fff; text-decoration: none; box-shadow: 0 6px 20px rgba(10,55,47,.2); cursor: pointer; font-size: 12px; font-weight: 800; }
    .to-top { display: none; background: var(--coral); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .nav-row { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: block; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; padding: 6px 0; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 10px; }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .hero { padding: 55px 0 35px; }
      .hero-copy { font-size: 16px; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      main section { padding: 50px 0; }
      .intro-grid, .industry-grid, .contact-grid { grid-template-columns: 1fr; gap: 22px; }
      .service-grid, .case-grid, .review-grid, .article-grid { grid-template-columns: 1fr 1fr; }
      .flow { grid-template-columns: 1fr; border-top: 0; border-left: 1px solid #a9cbc1; margin-left: 5px; }
      .flow-step { padding: 0 0 22px 22px; }
      .flow-step::before { top: 3px; left: -6px; }
      .faq-list { grid-template-columns: 1fr; }
      .footer-top, .affiliate-row { flex-direction: column; }
    }
    @media (max-width: 480px) {
      .service-grid, .case-grid, .review-grid, .article-grid, .feature-list { grid-template-columns: 1fr; }
      .metrics { gap: 8px; }
      .metric { padding: 14px; }
      .metric strong { font-size: 18px; }
      .score-band { align-items: flex-start; flex-direction: column; }
      .price-row { grid-template-columns: 1fr; }
      .price-row .button { justify-self: start; }
      form { grid-template-columns: 1fr; padding: 16px; }
      form label.full, form button, .form-note { grid-column: auto; }
      .float-contact { right: 10px; bottom: 12px; }
      .float-contact a, .to-top { width: 43px; height: 43px; }
    }