:root {
      color-scheme: light;
      --ink: #17251e;
      --muted: #58685e;
      --green: #2e7d32;
      --green-dark: #1f5d2a;
      --lime: #b7e34b;
      --paper: #f5f8f3;
      --line: #dce5d9;
      --white: #fff;
      --orange: #ee8a3a;
      --blue: #315f87;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    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; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid rgba(23,37,30,.09);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { display: block; max-width: 100%; height: auto; width: 42px; max-height: 42px; object-fit: contain; }
    .brand-name { font-size: 18px; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #405047; font-size: 13px; border-radius: 4px; transition: background .2s, color .2s; }
    .nav-links a:hover { color: var(--green-dark); background: #edf5e8; }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 0; border-radius: 4px; padding: 12px 18px; background: var(--green);
      color: #fff; font-weight: 700; transition: transform .2s, background .2s, box-shadow .2s;
      cursor: pointer;
    }
    .nav-cta { padding: 10px 15px; white-space: nowrap; font-size: 13px; }
    .button:hover, .nav-cta:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(31,93,42,.18); }
    .button.light { color: var(--ink); background: #fff; border: 1px solid var(--line); }
    .button.light:hover { background: #f0f6ec; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 4px; font-size: 20px; }
    .hero {
      overflow: hidden; position: relative; isolation: isolate;
      background: linear-gradient(118deg, #eaf4df 0%, #f7faef 53%, #e8f1d8 100%);
      border-bottom: 1px solid #d8e7ca;
    }
    .hero::before, .hero::after { content: ""; position: absolute; z-index: -1; pointer-events: none; }
    .hero::before {
      width: 410px; height: 410px; right: -100px; top: -170px;
      border: 1px solid rgba(46,125,50,.22); border-radius: 50%;
      box-shadow: 0 0 0 34px rgba(46,125,50,.035), 0 0 0 70px rgba(46,125,50,.025);
      animation: orbit 22s linear infinite;
    }
    .hero::after {
      width: 230px; height: 230px; right: 14%; bottom: -168px;
      border: 1px solid rgba(46,125,50,.2); transform: rotate(45deg);
    }
    .hero-inner { padding: 76px 0 52px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(270px, .6fr); gap: 52px; align-items: center; }
    .eyebrow { color: var(--green-dark); text-transform: uppercase; letter-spacing: 1.2px; font-size: 12px; font-weight: 800; }
    h1 { max-width: 740px; margin: 15px 0 18px; font-size: clamp(36px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 660px; color: #435348; font-size: 17px; margin: 0 0 27px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .hero-note { margin-top: 18px; color: #56665a; font-size: 13px; }
    .hero-panel { padding: 24px 0 24px 25px; border-left: 1px solid rgba(46,125,50,.27); }
    .panel-kicker { color: var(--muted); font-size: 13px; }
    .panel-score { margin: 5px 0; font-size: 49px; line-height: 1.1; font-weight: 800; color: var(--green-dark); }
    .stars { color: #df9a27; letter-spacing: 2px; font-size: 20px; }
    .panel-rule { height: 1px; background: #cbd9c4; margin: 18px 0; }
    .model-preview { display: flex; flex-wrap: wrap; gap: 7px; }
    .model-preview span, .tag { display: inline-block; color: #31553a; background: #fff; border: 1px solid #d7e6ce; padding: 5px 9px; font-size: 12px; border-radius: 3px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding: 24px 0; }
    .metric { padding: 8px 20px; border-right: 1px solid var(--line); }
    .metric:first-child { padding-left: 0; }
    .metric:last-child { border: 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 22px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 78px 0; scroll-margin-top: 84px; }
    .section.alt { background: #edf3e9; border-block: 1px solid #e0e9db; }
    .section.white { background: #fff; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { margin: 5px 0 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.2; }
    .section-head p { max-width: 520px; margin: 0; color: var(--muted); }
    .intro-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 44px; align-items: start; }
    .intro-copy { font-size: 17px; color: #3e5044; }
    .intro-copy p { margin: 0 0 16px; }
    .intro-points { border-top: 1px solid var(--line); }
    .intro-point { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .intro-point strong { color: var(--green-dark); }
    .intro-point span { color: var(--muted); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 28px; border-top: 1px solid var(--line); }
    .service-item { padding: 23px 4px 25px; border-bottom: 1px solid var(--line); }
    .service-item .number { color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    .service-item h3 { font-size: 18px; margin: 8px 0 7px; }
    .service-item p { color: var(--muted); font-size: 14px; margin: 0; }
    .service-item a { display: inline-block; margin-top: 11px; color: var(--green-dark); font-size: 13px; font-weight: 700; }
    .strip { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 23px 26px; margin-top: 32px; color: #fff; background: var(--green-dark); }
    .strip strong { font-size: 18px; }
    .strip p { margin: 3px 0 0; color: #e0ebdb; font-size: 14px; }
    .strip .button { flex: 0 0 auto; background: var(--lime); color: #18341d; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
    .industry { min-height: 138px; padding: 19px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.55); }
    .industry b { display: block; margin-bottom: 7px; }
    .industry span { color: var(--muted); font-size: 13px; }
    .models { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
    .models .tag { background: #fff; }
    .process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .process-item { position: relative; padding: 22px 24px 20px 0; border-top: 2px solid #a5c78f; counter-increment: step; }
    .process-item::before { content: "0" counter(step); display: block; color: var(--green); font-weight: 800; font-size: 13px; margin-bottom: 12px; }
    .process-item h3 { margin: 0 0 8px; font-size: 17px; }
    .process-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .rating-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 40px; align-items: start; }
    .rating-score { background: #e8f2de; padding: 28px; border-left: 4px solid var(--green); }
    .rating-score strong { display: block; color: var(--green-dark); font-size: 52px; line-height: 1; }
    .rating-score p { color: var(--muted); margin: 12px 0 0; }
    .rating-score .stars { margin-top: 9px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 650px; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid #e7ece4; vertical-align: top; }
    th { color: #314c38; background: #eff5e9; font-size: 13px; }
    td { font-size: 14px; color: #4c5c51; }
    td:first-child { color: var(--ink); font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .yes { color: var(--green-dark); font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .review { padding: 20px 0; border-top: 2px solid #8ab56c; }
    .review p { margin: 0 0 16px; color: #3e5044; }
    .review b { display: block; font-size: 14px; }
    .review span { color: var(--muted); font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { background: #fff; border: 1px solid var(--line); overflow: hidden; transition: transform .2s, box-shadow .2s; }
    .case:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(31,65,37,.09); }
    .case-media { aspect-ratio: 16 / 9; background: #e8efe2; overflow: hidden; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
    .case-copy { padding: 16px; }
    .case-copy h3 { margin: 0 0 5px; font-size: 16px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .articles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 30px; border-top: 1px solid var(--line); }
    .article-link { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .article-link span { font-weight: 650; }
    .article-link small { flex: 0 0 auto; color: var(--green); }
    .article-link:hover span { color: var(--green-dark); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { list-style: none; cursor: pointer; padding: 17px 34px 17px 0; position: relative; 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 { max-width: 850px; margin: -3px 0 18px; color: var(--muted); }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .contact-info { padding-right: 24px; }
    .contact-info h2 { font-size: 32px; line-height: 1.2; margin: 8px 0 14px; }
    .contact-info p { color: var(--muted); }
    .contact-list { padding: 0; margin: 22px 0 0; list-style: none; }
    .contact-list li { padding: 10px 0; border-bottom: 1px solid var(--line); }
    .contact-list b { display: inline-block; min-width: 100px; }
    .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 { min-width: 0; width: 100%; border: 1px solid #cdd8ca; border-radius: 3px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(46,125,50,.1); }
    .field textarea { min-height: 120px; resize: vertical; }
    .form-note { grid-column: 1 / -1; margin: -3px 0 0; color: var(--muted); font-size: 12px; }
    .footer { color: #e8f0e5; background: #193b25; padding: 32px 0 20px; }
    .footer-main { display: flex; justify-content: space-between; align-items: start; gap: 32px; }
    .footer-brand { max-width: 430px; }
    .footer-brand b { color: #fff; font-size: 18px; }
    .footer-brand p { color: #cbd8c7; font-size: 13px; margin: 7px 0 0; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; max-width: 560px; }
    .footer-links a { color: #e4eee0; font-size: 13px; }
    .footer-links a:hover { color: var(--lime); }
    .copyright { margin-top: 22px; padding-top: 15px; border-top: 1px solid rgba(255,255,255,.16); color: #c4d2c0; font-size: 12px; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating a { display: grid; place-items: center; width: 48px; height: 48px; background: var(--green-dark); color: #fff; border: 1px solid rgba(255,255,255,.55); box-shadow: 0 6px 18px rgba(22,57,29,.2); font-size: 12px; font-weight: 700; border-radius: 50%; transition: transform .2s; }
    .floating a:hover { transform: translateY(-3px); background: var(--green); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; 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: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { order: 2; }
      .nav-links { display: none; order: 3; flex-basis: 100%; justify-content: flex-start; padding: 7px 0 3px; border-top: 1px solid var(--line); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 9px 10px; }
      .hero-inner { gap: 30px; }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { gap: 10px; }
      .nav-cta { font-size: 12px; padding: 9px 11px; }
      .brand-name { font-size: 16px; }
      .hero-inner { grid-template-columns: 1fr; padding: 55px 0 32px; gap: 25px; }
      h1 { font-size: 39px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { border-left: 0; border-top: 1px solid rgba(46,125,50,.27); padding: 18px 0 0; }
      .panel-score { font-size: 40px; }
      .metrics { grid-template-columns: repeat(2, 1fr); gap: 12px 0; }
      .metric { padding: 8px 12px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:first-child { padding-left: 12px; }
      .section { padding: 55px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .intro-layout, .rating-layout, .contact-layout { grid-template-columns: 1fr; gap: 24px; }
      .intro-point { grid-template-columns: 115px 1fr; gap: 12px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); gap: 0 16px; }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .industry { min-height: 125px; padding: 14px; }
      .process { grid-template-columns: repeat(2, 1fr); gap: 0 16px; }
      .process-item { padding-right: 8px; }
      .reviews { grid-template-columns: 1fr 1fr; gap: 10px 20px; }
      .case-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
      .case-copy { padding: 12px; }
      .articles { grid-template-columns: 1fr; }
      .strip { align-items: flex-start; flex-direction: column; }
      .footer-main { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
      .floating { right: 12px; bottom: 14px; }
      .floating a { width: 44px; height: 44px; }
    }
    @media (max-width: 430px) {
      .service-grid, .reviews, .case-grid { grid-template-columns: 1fr; }
      .hero-actions .button { width: 100%; }
      .form { grid-template-columns: 1fr; }
      .field.full, .form-note { grid-column: auto; }
      .intro-point { grid-template-columns: 1fr; gap: 3px; }
      .nav-links a { font-size: 12px; padding: 8px; }
    }