:root {
      color-scheme: light;
      --ink: #202323;
      --muted: #656b68;
      --paper: #fbfaf7;
      --white: #fff;
      --line: #e7e8e2;
      --green: #b8f15a;
      --pink: #fb7299;
      --blue: #6b9dff;
      --yellow: #f7cb4d;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; z-index: 20; top: 0; background: rgba(251,250,247,.96); border-bottom: 1px solid var(--line); }
    .header-inner { min-height: 72px; 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; height: auto; }
    .nav-wrap { display: flex; align-items: center; gap: 18px; }
    .nav-links { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 6px 7px; text-decoration: none; color: #454a47; font-size: 12px; white-space: nowrap; }
    .nav-links a:hover { color: #298849; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 5px; padding: 7px 11px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 19px; border: 1px solid var(--ink); border-radius: 4px; background: var(--ink); color: var(--white); text-decoration: none; font-weight: 700; transition: transform .2s, background .2s; }
    .button:hover { transform: translateY(-2px); background: #39403a; }
    .button-accent { border-color: var(--green); background: var(--green); color: #1b2614; }
    .button-accent:hover { background: #a8e64b; }
    .button-outline { background: transparent; color: var(--ink); }
    .button-outline:hover { background: #f0f1ec; }
    .hero { position: relative; overflow: hidden; padding: 78px 0 64px; background: #f0f5e9; border-bottom: 1px solid #e3e9da; }
    .hero::before { content: ""; position: absolute; width: 250px; height: 250px; right: max(4%, calc((100vw - var(--max))/2)); top: 62px; border: 1px solid rgba(41,136,73,.22); border-radius: 50%; box-shadow: 0 0 0 28px rgba(184,241,90,.12), 0 0 0 57px rgba(107,157,255,.08); }
    .hero::after { content: ""; position: absolute; width: 100px; height: 100px; right: 10%; top: 138px; border-radius: 22px; transform: rotate(18deg); background: var(--pink); opacity: .76; }
    .hero-content { position: relative; z-index: 1; max-width: 690px; }
    .eyebrow { margin: 0 0 15px; color: #43804d; font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 650px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 600px; margin: 21px 0 25px; color: #505951; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; }
    .hero-notes { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 29px; color: #475149; font-size: 13px; }
    .hero-notes span::before { content: "✓"; margin-right: 7px; color: #33824a; font-weight: 900; }
    .section { padding: 72px 0; }
    .section-soft { background: #f1f2ed; border-block: 1px solid #e8e9e2; }
    .section-head { max-width: 700px; margin-bottom: 30px; }
    .section-head h2 { margin: 0 0 10px; font-size: 34px; line-height: 1.2; letter-spacing: 0; }
    .section-head p { margin: 0; color: var(--muted); }
    .section-kicker { margin: 0 0 8px; color: #3d8750; font-size: 12px; font-weight: 800; }
    .metric-row { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
    .metric { padding: 23px 18px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-size: 25px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    .intro-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 44px; align-items: start; }
    .intro-grid p { color: var(--muted); }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 22px; padding: 0; list-style: none; }
    .feature-list li { padding: 12px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .feature-list li::before { content: "＋"; margin-right: 9px; color: #37894f; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 26px; }
    .service-item { padding: 22px 0; border-top: 2px solid var(--ink); }
    .service-item:nth-child(3n+2) { border-color: var(--pink); }
    .service-item:nth-child(3n) { border-color: #75a0ff; }
    .service-item h3 { margin: 0 0 7px; font-size: 19px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-more { margin-top: 24px; padding: 19px 22px; background: #eaf2df; border-left: 4px solid #9cd54f; }
    .service-more p { margin: 0; color: #39453a; }
    .process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: steps; }
    .process article { counter-increment: steps; padding-top: 18px; border-top: 1px solid #a9b0a5; }
    .process article::before { content: "0" counter(steps); display: block; margin-bottom: 17px; color: #34864e; font-size: 13px; font-weight: 800; }
    .process h3 { margin: 0 0 7px; font-size: 18px; }
    .process p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-line { display: flex; flex-wrap: wrap; gap: 9px; }
    .industry-line span { padding: 8px 12px; border: 1px solid #dfe2d8; background: #fff; font-size: 14px; }
    .network { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
    .network p { color: var(--muted); }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 7px 10px; border-radius: 3px; background: #e9f4da; color: #304b34; font-size: 13px; }
    .model-cloud span:nth-child(3n) { background: #e5edff; color: #344a76; }
    .model-cloud span:nth-child(3n+2) { background: #fde8ef; color: #70384a; }
    .media-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .media-grid figure { margin: 0; overflow: hidden; background: #e8e9e3; }
    .media-grid img { display: block; width: 100%; height: auto; }
    .media-grid .square { grid-column: 1 / -1; display: grid; grid-template-columns: 180px 1fr; align-items: center; gap: 22px; padding: 20px; background: #f0f3e9; }
    .media-grid .square img { width: 100%; }
    .media-grid figcaption { padding: 12px 15px; color: #454c45; font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    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: #eef2e8; font-size: 13px; }
    td { color: #505650; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .rating { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 22px; padding: 20px 23px; background: #202724; color: #fff; }
    .rating strong { color: var(--green); font-size: 34px; }
    .rating .stars { color: var(--yellow); font-size: 21px; letter-spacing: 0; }
    .case-grid, .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .case { padding-top: 17px; border-top: 3px solid var(--blue); }
    .case:nth-child(2) { border-color: var(--pink); }
    .case:nth-child(3) { border-color: var(--green); }
    .case h3 { margin: 0 0 8px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { background: #f4f0e8; }
    .review { padding: 18px 0; border-top: 1px solid #d9d8cf; }
    .review p { margin: 0 0 12px; color: #454a45; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: var(--muted); font-size: 12px; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 38px; align-items: start; }
    .match-aside { padding: 22px; background: #e9f3de; border-left: 4px solid #9bd854; }
    .match-aside h3 { margin: 0 0 8px; }
    .match-aside p { margin: 0; color: #4f5a4d; }
    .form-grid { display: grid; grid-template-columns: 1fr 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 { width: 100%; padding: 11px 12px; border: 1px solid #d6dad2; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .form-submit { margin-top: 16px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 35px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 13px; color: #34864e; font-size: 22px; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0 0 17px; color: var(--muted); }
    .article-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 24px; }
    .article-list a { padding: 17px 0; border-top: 1px solid #cfd3ca; text-decoration: none; font-weight: 650; }
    .article-list a::after { content: " ↗"; color: #34864e; }
    .article-list a:hover { color: #287744; }
    .link-list { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .link-list a { color: #414841; font-size: 14px; text-decoration-color: #a9c48a; text-underline-offset: 4px; }
    .contact-panel { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: center; padding: 23px 0; border-block: 1px solid var(--line); }
    .contact-panel p { margin: 4px 0; color: var(--muted); }
    .contact-qr { display: flex; align-items: center; gap: 15px; }
    .contact-qr img { width: 96px; height: auto; }
    .site-footer { padding: 25px 0; background: #eff1eb; color: #363c37; }
    .footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px 24px; }
    .footer-inner p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 15px; }
    .footer-links a { color: #39423a; font-size: 13px; }
    .floating-contact { position: fixed; z-index: 15; right: 16px; bottom: 18px; display: grid; gap: 8px; }
    .floating-contact a { display: grid; place-items: center; min-width: 46px; min-height: 46px; padding: 0 12px; border: 1px solid #d8ded2; background: #fff; color: var(--ink); text-decoration: none; box-shadow: 0 4px 16px rgba(29,38,30,.09); font-size: 12px; }
    .to-top { cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (max-width: 940px) {
      .header-inner { flex-wrap: wrap; padding-block: 13px; }
      .nav-wrap { flex: 1; justify-content: flex-end; }
      .menu-toggle { display: inline-flex; }
      .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; padding: 12px max(20px, calc((100% - var(--max))/2)); background: var(--paper); border-bottom: 1px solid var(--line); justify-content: flex-start; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .header-inner { min-height: 62px; gap: 12px; }
      .brand { font-size: 14px; }
      .ai-page-logo { width: 32px; }
      .header-cta { min-height: 39px; padding: 0 12px; font-size: 13px; }
      .nav-links { max-height: 70vh; overflow: auto; }
      .hero { padding: 62px 0 47px; }
      .hero::before { right: -140px; top: 130px; }
      .hero::after { right: 24px; top: 205px; width: 55px; height: 55px; }
      .hero-content { padding-right: 15px; }
      .hero-copy { font-size: 16px; }
      .section { padding: 52px 0; }
      .section-head h2 { font-size: 28px; }
      .metric-row { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .intro-grid, .network, .match-layout { grid-template-columns: 1fr; gap: 22px; }
      .feature-list { grid-template-columns: 1fr; }
      .service-grid, .process, .case-grid, .review-grid, .article-list { grid-template-columns: 1fr; }
      .service-item { padding: 17px 0; }
      .process { gap: 18px; }
      .process article::before { margin-bottom: 7px; }
      .media-grid .square { grid-template-columns: 100px 1fr; gap: 14px; padding: 13px; }
      .rating { align-items: flex-start; flex-direction: column; }
      .form-grid { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
      .floating-contact { right: 9px; bottom: 10px; }
      .floating-contact a { min-width: 42px; min-height: 42px; padding: 0 9px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }