:root {
      color-scheme: light;
      --ink: #29241f;
      --muted: #6f6861;
      --paper: #fff9f4;
      --white: #fff;
      --line: #eadfd5;
      --orange: #e75c21;
      --orange-dark: #b94212;
      --gold: #ffc15a;
      --green: #315b4a;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    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; }
    button, a { -webkit-tap-highlight-color: transparent; }
    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, 249, 244, .96);
      border-bottom: 1px solid rgba(234, 223, 213, .85);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { max-width: 100%; height: auto; width: 42px; display: block; }
    .brand-name { font-size: 18px; }
    .nav-links { display: flex; gap: 0; align-items: center; justify-content: flex-end; flex-wrap: wrap; }
    .nav-links a { color: #4d453f; font-size: 13px; padding: 9px 10px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--orange-dark); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 0; border-radius: 4px; background: var(--orange); color: var(--white);
      font-weight: 750; padding: 12px 18px; cursor: pointer; transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { white-space: nowrap; font-size: 13px; padding: 10px 14px; }
    .button:hover, .nav-cta:hover { background: var(--orange-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(185, 66, 18, .18); }
    .button.secondary { color: var(--ink); background: var(--white); border: 1px solid var(--line); }
    .button.secondary:hover { background: #fff0e4; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); width: 42px; height: 42px; color: var(--ink); border-radius: 4px; }
    .hero {
      position: relative; overflow: hidden; color: var(--ink);
      background: linear-gradient(135deg, #fff3e5 0%, #ffe1c2 52%, #ffd091 100%);
      border-bottom: 1px solid #f0cba5;
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(231, 92, 33, .18); transform: rotate(24deg); }
    .hero::before { width: 390px; height: 390px; right: 4%; top: -150px; border-radius: 48% 52% 40% 60%; }
    .hero::after { width: 260px; height: 260px; right: 14%; bottom: -170px; border-radius: 50%; }
    .hero-inner { position: relative; z-index: 1; padding: 74px 0 60px; max-width: 900px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--orange-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: currentColor; }
    h1 { max-width: 780px; margin: 16px 0 18px; font-size: clamp(38px, 6vw, 66px); line-height: 1.1; letter-spacing: 0; }
    .hero-copy { max-width: 660px; color: #57483e; font-size: 17px; margin: 0; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
    .hero-note { margin-top: 22px; color: #6d5a4e; font-size: 13px; }
    .hero-note strong { color: var(--orange-dark); }
    .hero-strip { padding: 0 0 26px; }
    .metric-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(185, 66, 18, .22); }
    .metric { padding: 18px 20px 0 0; }
    .metric strong { display: block; font-size: 18px; color: var(--orange-dark); }
    .metric span { display: block; color: #6d5a4e; font-size: 12px; margin-top: 3px; }
    .section { padding: 70px 0; }
    .section.white { background: var(--white); }
    .section.green { background: #eaf1eb; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .kicker { color: var(--orange-dark); font-weight: 800; font-size: 12px; text-transform: uppercase; }
    h2 { font-size: clamp(26px, 4vw, 38px); letter-spacing: 0; line-height: 1.2; margin: 7px 0 10px; }
    h3 { margin: 0 0 8px; line-height: 1.35; font-size: 18px; }
    .section-intro { color: var(--muted); margin: 0; max-width: 680px; }
    .platform-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: start; }
    .platform-copy p { color: #574f49; margin: 0 0 15px; }
    .check-list { list-style: none; padding: 0; margin: 22px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; }
    .check-list li { position: relative; padding-left: 25px; font-weight: 650; font-size: 14px; }
    .check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--orange-dark); font-weight: 900; }
    .model-panel { border-left: 3px solid var(--orange); padding: 4px 0 4px 22px; }
    .model-panel p { color: var(--muted); margin: 0 0 16px; font-size: 14px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag { border: 1px solid #e4d7cb; background: #fff; color: #4b433c; padding: 6px 10px; font-size: 12px; border-radius: 3px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 26px; border-top: 1px solid var(--line); }
    .service-item { padding: 23px 0; border-bottom: 1px solid var(--line); }
    .service-item .num { color: var(--orange-dark); font-size: 12px; font-weight: 800; margin-bottom: 9px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item a { display: inline-block; margin-top: 12px; color: var(--orange-dark); font-size: 13px; font-weight: 750; }
    .feature-banner { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; margin-top: 38px; padding: 24px; background: #fff1e5; border: 1px solid #f0d4bd; }
    .media-frame { overflow: hidden; background: #f5eee8; }
    .media-frame img { width: 100%; display: block; object-fit: contain; }
    .feature-banner p { color: var(--muted); margin: 0 0 16px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
    .step { border-top: 2px solid var(--orange); padding-top: 16px; }
    .step::before { counter-increment: step; content: "0" counter(step); color: var(--orange-dark); font-weight: 850; font-size: 13px; }
    .step h3 { margin-top: 10px; }
    .step p { color: var(--muted); margin: 0; font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .industry { padding: 18px; background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--orange); }
    .industry p { color: var(--muted); margin: 0; font-size: 13px; }
    .service-network { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
    .network-points { display: grid; gap: 15px; }
    .network-point { display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: start; }
    .network-point b { display: grid; place-items: center; width: 32px; height: 32px; color: var(--orange-dark); background: #ffe6d3; border-radius: 50%; }
    .network-point p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-point strong { color: var(--ink); display: block; margin-bottom: 2px; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    table { border-collapse: collapse; width: 100%; min-width: 700px; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { color: #fff; background: #3c332d; font-size: 13px; }
    td { font-size: 14px; }
    tbody tr:last-child td { border-bottom: 0; }
    td:first-child { font-weight: 750; width: 22%; }
    .rating { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-bottom: 20px; padding: 18px 22px; background: #fff0e2; border-left: 4px solid var(--orange); }
    .rating strong { font-size: 28px; color: var(--orange-dark); }
    .stars { color: #bd5b1e; letter-spacing: 0; font-size: 20px; }
    .rating span { color: #61544b; }
    .case-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 22px; align-items: start; }
    .case-main { background: #fff0e3; padding: 24px; }
    .case-main p, .case-side p { color: var(--muted); margin: 0; }
    .case-side { display: grid; gap: 18px; }
    .case-side article { padding: 17px 0; border-top: 1px solid var(--line); }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .review { padding: 19px 0; border-top: 2px solid var(--green); }
    .review p { margin: 0 0 13px; color: #4f4842; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .price-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 32px; align-items: start; }
    .price-callout { padding: 22px; background: #f9e9dc; }
    .price-callout p { margin: 0 0 15px; color: #5e5046; }
    .price-callout strong { color: var(--orange-dark); }
    .price-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
    .price-list li { display: flex; justify-content: space-between; gap: 20px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .price-list span:last-child { color: var(--muted); text-align: right; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; cursor: pointer; list-style: none; padding: 17px 40px 17px 0; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 5px; top: 13px; font-size: 22px; color: var(--orange-dark); transition: transform .2s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 850px; color: var(--muted); margin: -2px 34px 17px 0; font-size: 14px; }
    .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .article { border-top: 2px solid var(--orange); padding-top: 16px; }
    .article small { color: var(--orange-dark); font-weight: 750; }
    .article h3 { margin-top: 8px; }
    .article p { margin: 0; color: var(--muted); font-size: 14px; }
    .article a { display: inline-block; margin-top: 12px; color: var(--orange-dark); font-weight: 750; font-size: 13px; }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-details { display: grid; gap: 8px; margin-top: 20px; font-size: 14px; }
    .contact-details a { color: var(--orange-dark); font-weight: 700; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; border: 1px solid #d9cec4; border-radius: 3px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(231, 92, 33, .12); }
    textarea { min-height: 112px; resize: vertical; }
    .form-note { grid-column: 1 / -1; margin: -4px 0 0; color: var(--muted); font-size: 12px; }
    .form-submit { grid-column: 1 / -1; justify-self: start; }
    .join-strip { display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 25px 0; border-top: 1px solid var(--line); }
    .join-strip p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
    .site-footer { background: #f1e6dc; color: #342b25; border-top: 1px solid #e3d2c4; }
    .footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; padding: 28px 0; }
    .footer-main p { margin: 7px 0 0; color: #60554c; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: flex-end; align-content: start; }
    .footer-links a { color: #4a3e35; font-size: 13px; text-decoration: underline; text-decoration-color: #c5aa94; text-underline-offset: 3px; }
    .copyright { border-top: 1px solid #dfcfc1; color: #65584e; font-size: 12px; padding: 12px 0; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
    .floating a, .floating button { display: grid; place-items: center; min-width: 46px; min-height: 46px; padding: 0 12px; border: 1px solid #e7c8b3; border-radius: 4px; color: #5c3422; background: #fff8f2; box-shadow: 0 5px 18px rgba(62, 37, 22, .12); cursor: pointer; font-size: 12px; font-weight: 750; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: none; }
    @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: 940px) {
      .nav-row { min-height: 66px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; padding: 10px 20px 16px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 10px 18px rgba(50, 35, 25, .08); justify-content: flex-start; }
      .nav-links.open { display: flex; }
      .nav-links a { width: 33.33%; padding: 10px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero-inner { padding: 52px 0 42px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .metric-row { grid-template-columns: repeat(2, 1fr); row-gap: 14px; }
      .metric { padding-top: 14px; }
      .section { padding: 52px 0; }
      .section-head { display: block; }
      .section-head .button { margin-top: 18px; }
      .platform-layout, .feature-banner, .service-network, .case-grid, .price-layout, .form-layout { grid-template-columns: 1fr; gap: 24px; }
      .check-list { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 24px 18px; }
      .industry-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
      .industry { padding: 14px; }
      .review-grid { grid-template-columns: 1fr; gap: 8px; }
      .article-grid { grid-template-columns: 1fr; gap: 20px; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full, .form-note, .form-submit { grid-column: auto; }
      .join-strip { align-items: flex-start; flex-direction: column; }
      .footer-main { grid-template-columns: 1fr; }
      .footer-links { justify-content: flex-start; }
      .nav-links a { width: 50%; }
      .floating { right: 10px; bottom: 12px; }
    }