:root {
      color-scheme: light;
      --ink: #202321;
      --muted: #626861;
      --paper: #fffaf0;
      --white: #fff;
      --line: #e8e5dc;
      --orange: #f06435;
      --pink: #ef4f78;
      --lime: #c9e947;
      --teal: #168f83;
      --blue: #345cc5;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body { margin: 0; background: var(--paper); color: var(--ink); font-family: system-ui, -apple-system, "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-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,250,240,.96); border-bottom: 1px solid rgba(32,35,33,.1); backdrop-filter: blur(12px); }
    .nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 850; white-space: nowrap; }
    .ai-page-logo { width: 42px; height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 8px 9px; color: #424741; text-decoration: none; font-size: 13px; white-space: nowrap; border-radius: 5px; }
    .nav-links a:hover { color: var(--orange); background: #fff0e6; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; padding: 12px 18px; background: var(--ink); color: #fff; font-weight: 750; text-decoration: none; border-radius: 4px; transition: transform .2s, background .2s, box-shadow .2s; cursor: pointer; }
    .nav-cta { flex: 0 0 auto; padding: 10px 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--orange); box-shadow: 0 8px 20px #f0643530; }
    .button-light { color: var(--ink); background: var(--lime); }
    .button-outline { border: 1px solid var(--ink); background: transparent; color: var(--ink); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); width: 42px; height: 42px; border-radius: 4px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 78px 0 56px; background: var(--orange); }
    .hero::before { position: absolute; content: ""; width: 430px; height: 430px; right: -135px; top: -190px; border: 1px solid rgba(32,35,33,.25); border-radius: 50%; box-shadow: 0 0 0 34px rgba(255,255,255,.07), 0 0 0 70px rgba(255,255,255,.06); }
    .hero::after { position: absolute; content: ""; width: 110px; height: 110px; right: 18%; bottom: 8%; background: var(--lime); transform: rotate(18deg); }
    .hero-inner { position: relative; z-index: 1; }
    .hero-copy { max-width: 800px; }
    .eyebrow { margin: 0 0 14px; font-size: 13px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
    h1 { max-width: 750px; margin: 0; font-size: clamp(38px, 7vw, 72px); line-height: 1.08; letter-spacing: 0; }
    .hero-lead { max-width: 650px; margin: 22px 0 26px; font-size: 18px; color: #25251f; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-actions .button-light { background: var(--lime); }
    .hero-note { margin: 20px 0 0; font-size: 13px; color: #342d27; }
    .hero-bottom { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 54px; background: #25251f45; border: 1px solid #25251f45; }
    .metric { padding: 17px 20px; background: #fff3dc; }
    .metric strong { display: block; font-size: 17px; }
    .metric span { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section-white { background: #fff; }
    .section-color { background: #eef5dc; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .kicker { margin: 0 0 7px; color: var(--teal); font-size: 12px; font-weight: 850; letter-spacing: 1px; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin: 12px 0 0; color: var(--muted); }
    .text-link { color: var(--blue); font-weight: 750; text-decoration-thickness: 1px; text-underline-offset: 4px; }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: #4d534d; }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 22px 0 0; padding: 0; list-style: none; }
    .feature-list li { padding: 13px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .feature-list li::before { content: "＋"; margin-right: 9px; color: var(--orange); font-weight: 900; }
    .quote-panel { padding: 28px; background: var(--lime); border-left: 7px solid var(--ink); }
    .quote-panel strong { display: block; font-size: 22px; line-height: 1.35; }
    .quote-panel p { margin: 12px 0 0; color: #414638; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service { padding: 23px; background: var(--white); border: 1px solid var(--line); transition: transform .2s, box-shadow .2s; }
    .service:hover, .review:hover, .case:hover { transform: translateY(-4px); box-shadow: 0 12px 28px #24321e12; }
    .service-tag { display: inline-block; margin-bottom: 12px; padding: 4px 8px; background: #fff0e6; color: #b3411e; font-size: 11px; font-weight: 800; }
    h3 { margin: 0 0 9px; font-size: 19px; line-height: 1.35; }
    .service p, .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 20px 22px 20px 0; border-top: 2px solid var(--ink); counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin: -32px 0 15px; width: fit-content; padding: 4px 8px; background: var(--pink); color: #fff; font-size: 13px; font-weight: 850; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-strip { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 25px; }
    .industry-strip span { padding: 8px 12px; border: 1px solid #c9d5b4; background: #f8fbed; font-size: 13px; font-weight: 700; }
    .network-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 30px; align-items: start; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-list span { padding: 7px 10px; background: #f1f3ed; color: #333a32; font-size: 13px; }
    .network-note { padding: 24px; background: #e6f5f1; border-top: 4px solid var(--teal); }
    .network-note p { margin: 0 0 12px; color: #46534f; }
    .network-note p:last-child { margin-bottom: 0; }
    .timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 26px; }
    .timeline-item { padding: 18px 0; border-top: 1px solid var(--line); }
    .timeline-item strong { display: block; margin-bottom: 6px; }
    .timeline-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .2s, box-shadow .2s; }
    .image-wrap { overflow: hidden; background: #f1f0ea; aspect-ratio: 16 / 9; }
    .image-wrap img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 18px; }
    .case-body h3 { font-size: 17px; }
    .rating-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 34px; align-items: start; }
    .rating { padding: 26px; color: #fff; background: var(--blue); }
    .rating .score { display: block; margin: 4px 0; color: var(--lime); font-size: 64px; line-height: 1; font-weight: 900; }
    .stars { color: var(--lime); font-size: 25px; letter-spacing: 2px; }
    .rating p { margin: 10px 0 0; color: #fff; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 680px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #f4f5ec; font-size: 13px; }
    td { color: #4c514b; font-size: 13px; }
    tbody tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 750; }
    .price-row { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; }
    .price-note { padding: 22px 24px; background: #fff0e6; border-left: 5px solid var(--orange); }
    .price-note p { margin: 0 0 12px; color: #51473f; }
    .price-note p:last-child { margin: 0; }
    .service-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .flow-cell { padding: 18px; background: #fff; border-bottom: 3px solid var(--teal); }
    .flow-cell strong { display: block; margin-bottom: 5px; }
    .flow-cell span { color: var(--muted); font-size: 13px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); transition: transform .2s, box-shadow .2s; }
    .review p { margin: 0 0 15px; color: #4a504a; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 5px; top: 14px; color: var(--orange); font-size: 23px; line-height: 1; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0 0 18px; color: var(--muted); }
    .resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
    .resource-box { padding-top: 17px; border-top: 3px solid var(--ink); }
    .resource-box p { margin: 0 0 12px; color: var(--muted); }
    .article-shortcode { padding: 14px; background: #f4f5ec; font-weight: 650; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-details { display: grid; gap: 13px; margin-top: 22px; }
    .contact-details div { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
    .contact-details strong { display: block; font-size: 13px; }
    .contact-details a { color: var(--blue); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; padding: 12px; border: 1px solid #d6d8d1; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 120px; resize: vertical; }
    .contact-form button { justify-self: start; }
    .join-band { padding: 30px; display: flex; align-items: center; justify-content: space-between; gap: 22px; background: var(--pink); }
    .join-band h2 { max-width: 650px; font-size: 30px; }
    .join-band p { margin: 8px 0 0; }
    .site-footer { padding: 30px 0 22px; background: #202321; color: #fff; }
    .footer-top { display: flex; justify-content: space-between; gap: 25px; align-items: start; }
    .footer-top p { max-width: 560px; margin: 8px 0 0; color: #d3d8d1; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 14px; max-width: 520px; }
    .footer-links a { color: #e9eddf; font-size: 12px; text-decoration: none; }
    .footer-links a:hover { color: var(--lime); }
    .copyright { margin-top: 22px; padding-top: 14px; border-top: 1px solid #ffffff2a; color: #c5cbc4; font-size: 12px; }
    .floating-contact { position: fixed; right: 16px; bottom: 18px; z-index: 15; }
    .floating-contact a { display: block; padding: 12px 15px; color: #fff; background: var(--teal); text-decoration: none; font-size: 13px; font-weight: 800; border-radius: 4px; box-shadow: 0 5px 18px #10241f30; }
    .to-top { position: fixed; right: 22px; bottom: 74px; z-index: 14; width: 40px; height: 40px; border: 1px solid #d7d9d1; background: #fff; color: var(--ink); cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s; }
    .to-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav { 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; width: 100%; justify-content: flex-start; padding: 8px 0 2px; border-top: 1px solid var(--line); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .intro-grid, .network-grid, .contact-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero { padding: 58px 0 34px; }
      .hero-lead { font-size: 16px; }
      .hero-bottom { grid-template-columns: repeat(2, 1fr); margin-top: 38px; }
      .metric { padding: 14px; }
      .section { padding: 54px 0; }
      .section-head { align-items: start; flex-direction: column; gap: 12px; }
      .service-grid, .cases, .reviews { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 22px 14px; padding-top: 12px; }
      .step { padding-right: 8px; }
      .step::before { margin-top: -28px; }
      .timeline { grid-template-columns: 1fr; }
      .rating-layout, .price-row, .resource-grid { grid-template-columns: 1fr; }
      .service-flow { grid-template-columns: 1fr 1fr; }
      .feature-list { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .join-band, .footer-top { flex-direction: column; align-items: flex-start; }
      .join-band { padding: 24px; }
      .join-band h2 { font-size: 25px; }
      .floating-contact { right: 10px; bottom: 12px; }
      .to-top { right: 16px; bottom: 68px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }