:root {
      color-scheme: light;
      --ink: #202b2b;
      --muted: #596764;
      --paper: #f7f8f5;
      --white: #fff;
      --line: #dfe6df;
      --green: #1e6956;
      --green-dark: #164c40;
      --coral: #d95e48;
      --yellow: #f0c455;
      --sky: #dceef0;
      --shadow: 0 12px 34px rgba(27, 57, 48, .08);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    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; text-decoration: none; }
    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; top: 0; z-index: 20; background: rgba(247,248,245,.96); border-bottom: 1px solid rgba(32,43,43,.09); backdrop-filter: blur(14px); }
    .header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; white-space: nowrap; }
    .brand img { width: 36px; height: 36px; object-fit: contain; }
    .ai-page-logo { max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { color: #344440; font-size: 13px; padding: 9px 10px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--coral); }
    .nav-links .nav-cta { margin-left: 8px; border-radius: 5px; padding: 9px 14px; background: var(--green); color: #fff; font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 5px; padding: 8px 11px; }
    main { overflow: hidden; }
    .hero { position: relative; isolation: isolate; padding: 78px 0 54px; background: #e9f2eb; border-bottom: 1px solid #d6e5dc; }
    .hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(112deg, #e8f2eb 0%, #f4f3df 50%, #f8e4d8 100%); }
    .hero-inner { max-width: 850px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 16px; color: var(--green-dark); font-size: 13px; font-weight: 750; }
    .eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 2px; background: var(--coral); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 760px; margin-bottom: 18px; font-size: clamp(38px, 6vw, 68px); line-height: 1.08; font-weight: 780; }
    .hero-copy { max-width: 700px; margin-bottom: 26px; color: #40524b; font-size: 18px; }
    .button-row { display: flex; flex-wrap: wrap; gap: 12px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 5px; background: var(--green); color: white; font-weight: 720; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(30,105,86,.18); background: var(--green-dark); }
    .button.secondary { border-color: #9db7a9; background: rgba(255,255,255,.65); color: var(--ink); }
    .hero-note { margin: 18px 0 0; color: #56645f; font-size: 13px; }
    .hero-art { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; max-width: 760px; margin-top: 42px; }
    .hero-art div { min-height: 84px; padding: 15px 17px; border-top: 3px solid var(--green); background: rgba(255,255,255,.68); }
    .hero-art div:nth-child(2) { border-color: var(--coral); }
    .hero-art div:nth-child(3) { border-color: #d5a625; }
    .hero-art strong { display: block; font-size: 16px; }
    .hero-art span { display: block; margin-top: 3px; color: var(--muted); font-size: 13px; }
    .section { padding: 68px 0; border-bottom: 1px solid rgba(32,43,43,.08); }
    .section.tint { background: #eff3ee; }
    .section.white { background: #fff; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 22px; margin-bottom: 28px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin-bottom: 8px; color: var(--coral); font-size: 12px; font-weight: 800; }
    h2 { margin-bottom: 9px; font-size: clamp(27px, 3.5vw, 39px); line-height: 1.2; }
    .section-intro { max-width: 720px; margin-bottom: 0; color: var(--muted); }
    .text-link { color: var(--green-dark); font-size: 14px; font-weight: 730; white-space: nowrap; }
    .text-link:hover { color: var(--coral); }
    .intro-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 38px; align-items: start; }
    .intro-copy p { color: #485650; }
    .feature-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px 22px; padding: 0; margin: 24px 0 0; list-style: none; }
    .feature-list li { padding-top: 11px; border-top: 1px solid var(--line); font-weight: 650; }
    .feature-list li span { display: block; margin-top: 3px; color: var(--muted); font-size: 13px; font-weight: 400; }
    .aside-note { padding: 21px; border-left: 4px solid var(--coral); background: #f9eee7; }
    .aside-note strong { display: block; margin-bottom: 8px; }
    .aside-note p { margin: 0; color: #554a43; font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: #dce3dc; border: 1px solid #dce3dc; }
    .service-item { padding: 21px; background: #fff; transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; background: #f6fbf6; transform: translateY(-3px); }
    .service-item .num { color: var(--coral); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 7px 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .tagline { display: inline-block; margin-top: 13px; color: var(--green-dark); font-size: 12px; font-weight: 700; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 22px; counter-reset: step; }
    .workflow article { position: relative; padding: 18px 16px 18px 0; border-top: 2px solid var(--green); counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; margin-bottom: 13px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin-bottom: 7px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case { display: grid; grid-template-columns: minmax(0,1fr) minmax(150px,.7fr); align-items: center; gap: 18px; padding: 16px; background: #fff; border: 1px solid var(--line); }
    .case img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #f0f2ee; }
    .case h3 { margin-bottom: 8px; font-size: 19px; }
    .case p { margin-bottom: 10px; color: var(--muted); font-size: 14px; }
    .case .text-link { font-size: 13px; }
    .case-single { grid-template-columns: minmax(0, .75fr) minmax(150px, .55fr); max-width: 560px; }
    .rating-row { display: flex; align-items: center; gap: 25px; margin-bottom: 24px; padding: 21px 24px; background: #e6f0e8; }
    .score { color: var(--green-dark); font-size: 38px; line-height: 1; font-weight: 800; }
    .stars { color: #c88917; font-size: 22px; letter-spacing: 2px; }
    .rating-row p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
    .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 var(--line); vertical-align: top; }
    th { background: #eff4ef; font-size: 13px; }
    td { color: #46534e; font-size: 14px; }
    tbody tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .positive { color: var(--green-dark); font-weight: 700; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 19px; }
    .model-list span { padding: 6px 10px; border: 1px solid #d7e2da; background: #fff; color: #34483f; font-size: 13px; }
    .quote-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 13px; }
    .quote { padding: 19px; border-top: 3px solid var(--green); background: #fff; }
    .quote:nth-child(2n) { border-color: var(--coral); }
    .quote p { margin-bottom: 17px; color: #46534e; font-size: 14px; }
    .quote strong { display: block; font-size: 13px; }
    .quote span { color: var(--muted); font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 0 16px; border-top: 1px solid var(--line); }
    .article-list a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); color: #34443e; font-size: 14px; }
    .article-list a:hover { color: var(--coral); }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 28px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 2px; top: 13px; color: var(--green); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0 0 17px; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .contact-info { display: grid; gap: 14px; }
    .contact-line { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .contact-line strong { display: block; font-size: 13px; }
    .contact-line span, .contact-line a { color: var(--muted); font-size: 14px; }
    .qr { width: 116px; padding: 7px; margin-top: 8px; background: #fff; border: 1px solid var(--line); }
    .qr img { display: block; width: 100%; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .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%; min-height: 44px; padding: 10px 12px; border: 1px solid #cad5ce; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(30,105,86,.2); border-color: var(--green); }
    .form-actions { display: flex; align-items: center; gap: 14px; margin-top: 16px; }
    .form-note { margin: 0; color: var(--muted); font-size: 12px; }
    .footer { padding: 28px 0 22px; background: #e5ebe5; color: #263530; }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 25px; }
    .footer p { max-width: 520px; margin: 8px 0 0; color: #52615b; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px 16px; }
    .footer-links a { color: #344b41; font-size: 13px; }
    .copyright { margin-top: 20px; padding-top: 13px; border-top: 1px solid #cfd8d0; color: #5a6862; font-size: 12px; }
    .float-tools { position: fixed; right: 16px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .float-tools a { display: grid; place-items: center; width: 44px; min-height: 44px; border: 1px solid #cbd9cf; border-radius: 4px; background: #fff; color: var(--green-dark); box-shadow: var(--shadow); font-size: 12px; font-weight: 750; }
    .float-tools a:hover { background: var(--green); color: #fff; }
    .reveal { opacity: 0; transform: translateY(14px); 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: 900px) {
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .header-row { flex-wrap: wrap; padding: 12px 0; }
      .nav-links { display: none; width: 100%; justify-content: flex-start; padding: 7px 0 3px; border-top: 1px solid var(--line); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .nav-links .nav-cta { margin-left: 0; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .article-list { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 650px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .hero { padding: 56px 0 38px; }
      .hero-copy { font-size: 16px; }
      .hero-art { grid-template-columns: 1fr; gap: 8px; margin-top: 30px; }
      .hero-art div { min-height: 0; }
      .section { padding: 48px 0; }
      .section-head { display: block; }
      .section-head .text-link { display: inline-block; margin-top: 12px; }
      .intro-grid, .contact-grid { grid-template-columns: 1fr; gap: 23px; }
      .feature-list { grid-template-columns: 1fr 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .service-item { padding: 17px; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 12px 18px; }
      .case-grid { grid-template-columns: 1fr; }
      .case, .case-single { grid-template-columns: minmax(0,1fr) minmax(110px,.65fr); }
      .quote-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .rating-row { gap: 15px; padding: 17px; }
      .score { font-size: 32px; }
      .footer-top { display: block; }
      .footer-links { justify-content: flex-start; margin-top: 17px; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .form-actions { align-items: flex-start; flex-direction: column; }
      .float-tools { right: 9px; bottom: 12px; }
      .float-tools a { width: 40px; min-height: 40px; }
    }