:root {
      color-scheme: light;
      --ink: #172321;
      --muted: #566562;
      --paper: #f8faf8;
      --white: #fff;
      --line: #dce5df;
      --green: #157b55;
      --green-dark: #0e5f42;
      --lime: #c9f36b;
      --orange: #ff8b54;
      --blue: #dcefff;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    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; z-index: 20; top: 0; background: rgba(248,250,248,.96); border-bottom: 1px solid var(--line); 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; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #34443f; font-size: 13px; text-decoration: none; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--green); }
    .nav-links .nav-cta { padding: 10px 15px; margin-left: 8px; color: var(--white); background: var(--green); border-radius: 4px; font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 4px; background: var(--white); color: var(--ink); padding: 8px 11px; cursor: pointer; }
    .hero { overflow: hidden; position: relative; background: #e7f4e9; border-bottom: 1px solid #d4e7d7; }
    .hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(112deg, transparent 48%, rgba(255,255,255,.42) 48.1%, transparent 75%); }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr); gap: 46px; align-items: center; padding-block: 74px 58px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 16px; color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    .eyebrow::before { width: 22px; height: 3px; content: ""; background: var(--orange); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 680px; margin-bottom: 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 610px; margin-bottom: 26px; color: #425650; font-size: 17px; }
    .actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
    .button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid transparent; border-radius: 4px; padding: 11px 18px; color: var(--white); background: var(--green); font-weight: 750; text-decoration: none; cursor: pointer; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
    .button:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 8px 18px rgba(21,123,85,.18); }
    .button-secondary { border-color: #a9c8b0; color: var(--ink); background: rgba(255,255,255,.65); }
    .button-secondary:hover { color: var(--green-dark); background: var(--white); }
    .hero-board { padding: 25px; border: 1px solid #c6ddca; background: rgba(255,255,255,.7); }
    .board-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
    .board-top strong { font-size: 14px; }
    .live-mark { display: inline-flex; align-items: center; gap: 7px; color: var(--green-dark); font-size: 12px; font-weight: 700; }
    .live-mark::before { width: 8px; height: 8px; border-radius: 50%; content: ""; background: #75bc39; box-shadow: 0 0 0 4px #e1f2d4; }
    .board-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding-top: 17px; }
    .board-item { min-height: 84px; padding: 14px; background: #f1f7f0; }
    .board-item b { display: block; margin-bottom: 4px; font-size: 18px; }
    .board-item span { color: var(--muted); font-size: 12px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding-block: 24px; border-bottom: 1px solid var(--line); }
    .metric { padding: 5px 22px; border-right: 1px solid var(--line); }
    .metric:first-child { padding-left: 0; }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-size: 22px; line-height: 1.25; }
    .metric span { color: var(--muted); font-size: 13px; }
    main { overflow: clip; }
    .section { padding-block: 76px; border-bottom: 1px solid var(--line); }
    .section-tint { background: #f0f6f1; }
    .section-blue { background: #edf5fb; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 25px; margin-bottom: 30px; }
    .section-heading > div { max-width: 700px; }
    .section-heading h2 { margin-bottom: 8px; font-size: clamp(27px, 3vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p { margin-bottom: 0; color: var(--muted); }
    .text-link { color: var(--green-dark); font-size: 14px; font-weight: 750; text-decoration-thickness: 1px; text-underline-offset: 4px; white-space: nowrap; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .intro-copy { max-width: 620px; color: var(--muted); }
    .intro-copy strong { color: var(--ink); }
    .check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 22px; margin: 0; padding: 4px 0 0; list-style: none; }
    .check-list li { display: flex; align-items: flex-start; gap: 10px; }
    .check-list li::before { width: 8px; height: 8px; flex: 0 0 8px; margin-top: 8px; border-radius: 50%; content: ""; background: var(--orange); }
    .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service { min-height: 176px; padding: 20px; background: var(--paper); transition: background .2s ease, transform .2s ease; }
    .service:hover { position: relative; z-index: 1; transform: translateY(-3px); background: var(--white); }
    .service small { display: block; margin-bottom: 14px; color: var(--green); font-size: 12px; font-weight: 800; }
    .service h3 { margin-bottom: 7px; font-size: 17px; }
    .service p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: flow; }
    .step { position: relative; padding: 18px 22px 18px 0; border-top: 2px solid #b6d8b9; counter-increment: flow; }
    .step::before { display: block; margin: -31px 0 18px; color: var(--green); background: var(--paper); width: max-content; padding-right: 9px; content: "0" counter(flow); font-size: 13px; font-weight: 850; }
    .step h3 { margin-bottom: 7px; font-size: 17px; }
    .step p { max-width: 235px; margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .industry-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 30px; }
    .industry { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .industry strong { font-size: 15px; }
    .industry span { color: var(--muted); font-size: 13px; text-align: right; }
    .network { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: center; }
    .network-copy { max-width: 560px; color: var(--muted); }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 8px 11px; border: 1px solid #c5dbcd; color: #254339; background: var(--white); font-size: 13px; }
    .comparison { width: 100%; border-collapse: collapse; background: var(--white); }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    .comparison th { color: #29423a; background: #e4f0e7; font-size: 13px; }
    .comparison td { font-size: 14px; }
    .comparison td:first-child { width: 24%; font-weight: 750; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); }
    .rating { display: flex; align-items: center; gap: 18px; margin-bottom: 22px; padding: 20px 24px; border-left: 4px solid var(--orange); background: #fff5ed; }
    .rating strong { font-size: 36px; line-height: 1; }
    .rating span { color: #73533d; }
    .stars { color: #d98224; letter-spacing: 0; }
    .cases-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 18px; align-items: stretch; }
    .case { overflow: hidden; border: 1px solid var(--line); background: var(--white); }
    .case figure { margin: 0; }
    .case .media { aspect-ratio: 16 / 9; overflow: hidden; background: #e9f1eb; }
    .case .media.square { aspect-ratio: 1; }
    .case img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case figcaption { padding: 17px 18px 19px; }
    .case h3 { margin-bottom: 5px; font-size: 16px; }
    .case p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .price-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .price-note { color: var(--muted); }
    .price-box { padding: 23px; border: 1px solid #c9d9d0; background: var(--white); }
    .price-box strong { display: block; margin-bottom: 7px; font-size: 20px; }
    .price-box p { margin-bottom: 17px; color: var(--muted); font-size: 14px; }
    .tag-line { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-line span { padding: 7px 10px; color: #24483c; background: #e8f3e9; font-size: 12px; }
    .reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .review { padding: 19px; border-top: 3px solid #8bbf91; background: var(--white); }
    .review blockquote { margin: 0 0 15px; color: #354641; font-size: 14px; }
    .review figcaption { color: var(--muted); font-size: 12px; font-weight: 700; }
    .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 { position: absolute; top: 15px; right: 4px; content: "+"; color: var(--green); font-size: 22px; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 36px 18px 0; color: var(--muted); font-size: 14px; }
    .article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-card { min-height: 140px; display: flex; flex-direction: column; justify-content: space-between; padding: 16px; border: 1px solid var(--line); background: var(--white); text-decoration: none; transition: border-color .2s ease, transform .2s ease; }
    .article-card:hover { transform: translateY(-2px); border-color: #8bbf91; }
    .article-card span { color: var(--green-dark); font-size: 12px; font-weight: 750; }
    .article-card strong { font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-info { color: var(--muted); }
    .contact-info p { margin-bottom: 12px; }
    .contact-info a { color: var(--green-dark); font-weight: 700; }
    .contact-info img { display: block; width: min(160px, 100%); height: auto; margin-top: 18px; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cbd8d0; border-radius: 3px; color: var(--ink); background: var(--white); }
    .field textarea { min-height: 115px; resize: vertical; }
    .form-note { margin: 12px 0 0; color: var(--muted); font-size: 12px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 25px; padding: 25px 0; }
    .join-band h2 { margin: 0 0 5px; font-size: 25px; }
    .join-band p { margin: 0; color: var(--muted); }
    .site-footer { padding-block: 28px; color: #263a32; background: #e6eee8; }
    .footer-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 25px; }
    .footer-brand { max-width: 360px; }
    .footer-brand strong { display: block; margin-bottom: 4px; }
    .footer-brand p, .copyright { margin: 0; color: #53645c; font-size: 12px; }
    .friend-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px 16px; max-width: 570px; }
    .friend-links a { color: #315645; font-size: 12px; text-decoration: none; }
    .friend-links a:hover { text-decoration: underline; }
    .copyright { margin-top: 17px; padding-top: 14px; border-top: 1px solid #cbd8d0; }
    .floating-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: flex; align-items: center; gap: 8px; padding: 11px 14px; border: 1px solid #bdd3c3; color: var(--ink); background: var(--white); box-shadow: 0 6px 24px rgba(23,35,33,.12); font-size: 13px; font-weight: 750; text-decoration: none; }
    .floating-contact::before { width: 8px; height: 8px; border-radius: 50%; content: ""; background: var(--green); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @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: 980px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .hero-inner { gap: 28px; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .article-grid { grid-template-columns: repeat(3, 1fr); }
      .industry-list { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 740px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-flex; }
      .nav-links { position: absolute; top: 63px; left: 0; right: 0; display: none; max-height: calc(100vh - 64px); overflow-y: auto; align-items: stretch; flex-direction: column; padding: 8px 16px 16px; border-bottom: 1px solid var(--line); background: var(--paper); }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 10px 7px; font-size: 14px; }
      .nav-links .nav-cta { margin: 7px 0 0; text-align: center; }
      .hero-inner { grid-template-columns: 1fr; padding-block: 54px 38px; }
      .hero-board { max-width: 520px; }
      .metrics { grid-template-columns: 1fr 1fr; row-gap: 18px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(3) { padding-left: 0; }
      .section { padding-block: 54px; }
      .section-heading { align-items: flex-start; flex-direction: column; gap: 12px; }
      .intro-grid, .network, .price-layout, .contact-grid { grid-template-columns: 1fr; gap: 25px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow { grid-template-columns: 1fr 1fr; gap: 30px 18px; }
      .step { padding-right: 5px; }
      .industry-list { grid-template-columns: 1fr; }
      .cases-grid { grid-template-columns: 1fr 1fr; }
      .cases-grid .case:first-child { grid-column: 1 / -1; }
      .reviews-grid { grid-template-columns: 1fr 1fr; }
      .article-grid { grid-template-columns: 1fr 1fr; }
      .footer-row { flex-direction: column; }
      .friend-links { justify-content: flex-start; }
      .join-band { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      h1 { font-size: 38px; }
      .hero-copy { font-size: 15px; }
      .service-grid { grid-template-columns: 1fr; }
      .service { min-height: 0; }
      .check-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr; gap: 28px; }
      .cases-grid, .reviews-grid { grid-template-columns: 1fr; }
      .cases-grid .case:first-child { grid-column: auto; }
      .article-grid { grid-template-columns: 1fr 1fr; }
      .article-card { min-height: 125px; padding: 13px; }
      .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .comparison th, .comparison td { min-width: 145px; padding: 12px; }
      .comparison th:first-child, .comparison td:first-child { min-width: 120px; }
      .floating-contact { right: 12px; bottom: 12px; }
    }