:root {
      --ink: #20221f;
      --muted: #62665d;
      --paper: #f8f8f4;
      --white: #fff;
      --line: #dedfd6;
      --lime: #d9f36a;
      --coral: #ff745d;
      --blue: #73c9e8;
      --violet: #b4a1f3;
      --green: #37634d;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    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; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; z-index: 20; top: 0; background: rgba(248,248,244,.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: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; max-width: 100%; height: auto; width: 38px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 7px 9px; color: #45483f; text-decoration: none; font-size: 13px; }
    .nav-links a:hover { color: var(--green); }
    .nav-links .nav-cta { margin-left: 8px; padding: 9px 15px; border: 1px solid var(--ink); border-radius: 3px; color: var(--ink); font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 3px; background: var(--white); padding: 8px 12px; color: var(--ink); }
    .hero { position: relative; overflow: hidden; padding: 76px 0 58px; background: #e9f0d6; border-bottom: 1px solid #d1dcc0; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 2px solid var(--ink); opacity: .72; }
    .hero::before { width: 120px; height: 42px; top: 72px; right: 12%; border-radius: 50%; transform: rotate(-18deg); box-shadow: 18px 12px 0 -10px var(--coral); }
    .hero::after { width: 45px; height: 45px; right: 7%; bottom: 44px; border-radius: 50%; background: var(--lime); box-shadow: -32px -15px 0 -12px var(--violet); }
    .hero-inner { position: relative; z-index: 1; max-width: 810px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 18px; color: #3b5b44; font-size: 13px; font-weight: 800; letter-spacing: .08em; }
    .eyebrow::before { content: ""; width: 24px; height: 3px; background: var(--coral); }
    h1 { max-width: 760px; margin: 0; font-size: clamp(42px, 7vw, 76px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 670px; margin: 20px 0 25px; color: #454b40; font-size: 18px; }
    .actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 18px; border: 1px solid var(--ink); border-radius: 3px; background: var(--ink); color: #fff; text-decoration: none; font-weight: 750; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 4px 4px 0 var(--coral); }
    .button.secondary { background: transparent; color: var(--ink); }
    .hero-note { margin: 13px 0 0; color: #545b4e; font-size: 13px; }
    .hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 52px; border-top: 1px solid #bdc9ae; }
    .hero-stat { padding: 17px 18px 0 0; }
    .hero-stat strong { display: block; font-size: 17px; }
    .hero-stat span { color: #60665a; font-size: 13px; }
    .section { padding: 72px 0; border-bottom: 1px solid var(--line); }
    .section-head { max-width: 720px; margin-bottom: 30px; }
    .section-kicker { margin: 0 0 8px; color: #58734d; font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(29px, 4vw, 43px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin: 13px 0 0; color: var(--muted); }
    .about-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 44px; align-items: start; }
    .about-copy p { margin: 0 0 14px; color: #4f534b; }
    .about-note { padding: 20px 22px; border-left: 4px solid var(--coral); background: #fff; }
    .about-note strong { display: block; margin-bottom: 5px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .tag { padding: 6px 10px; border: 1px solid #d7d9d0; background: #fff; color: #40443c; font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .service-item { min-height: 160px; padding: 20px; background: #fff; border-top: 3px solid var(--blue); transition: transform .18s ease, box-shadow .18s ease; }
    .service-item:nth-child(3n+2) { border-color: var(--coral); }
    .service-item:nth-child(3n) { border-color: var(--violet); }
    .service-item:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(35,43,30,.08); }
    .service-item h3, .case-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p, .case-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--ink); }
    .workflow-step { padding: 20px 18px 0 0; }
    .workflow-step span { display: block; margin-bottom: 12px; color: #c64e3d; font-size: 13px; font-weight: 800; }
    .workflow-step h3 { margin: 0 0 7px; font-size: 18px; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .solution-list { margin: 0; padding: 0; list-style: none; }
    .solution-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .solution-list strong { display: block; }
    .solution-list span { color: var(--muted); font-size: 14px; }
    .media-stack { display: grid; gap: 14px; }
    .media-frame { overflow: hidden; background: #e8ebdf; }
    .media-frame img { display: block; max-width: 100%; width: 100%; height: auto; }
    .single-media { width: min(340px, 100%); }
    .network { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
    .network-panel { padding: 24px; background: #e3eee8; border: 1px solid #cadbd0; }
    .network-panel p { margin: 0; color: #424b43; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-list span { padding: 7px 10px; background: #fff; border: 1px solid var(--line); font-size: 13px; }
    .comparison { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 680px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #e8e9e3; vertical-align: top; }
    th { background: #eff2e7; font-size: 14px; }
    td { color: #51564e; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .rating { display: flex; align-items: center; gap: 18px; margin: 0 0 20px; padding: 20px 22px; background: #f4edcf; }
    .rating strong { font-size: 34px; line-height: 1; }
    .rating span { color: #5b5540; }
    .stars { color: #bd6b27; letter-spacing: 2px; font-size: 18px; }
    .price-band { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 24px; background: #e4eff4; }
    .price-band h3 { margin: 0 0 6px; }
    .price-band p { margin: 0; color: #4f5a5d; }
    .price-label { padding: 11px 14px; background: #fff; border: 1px solid #c9d8dc; font-weight: 750; }
    .case-grid, .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .case-item { padding: 20px; background: #fff; border-bottom: 3px solid var(--lime); }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); }
    .review blockquote { margin: 0 0 16px; color: #42463f; }
    .review cite { color: #64705e; font-size: 13px; font-style: normal; font-weight: 750; }
    .resource-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; }
    .resource-list { display: grid; gap: 10px; }
    .resource-list a { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 14px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
    .resource-list a:hover { color: var(--green); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 34px 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 13px; font-size: 23px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 800px; margin: 0; padding: 0 0 17px; color: var(--muted); }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: #305e47; }
    .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 #cfd1c8; border-radius: 2px; background: #fff; color: var(--ink); padding: 11px 12px; }
    textarea { min-height: 120px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid #8ebd9b; outline-offset: 1px; }
    .form-submit { justify-self: start; cursor: pointer; }
    .footer { padding: 28px 0 22px; background: #e9ece3; color: #30352e; }
    .footer-row { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 24px; }
    .footer p { margin: 4px 0; color: #50574d; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer-links a { color: #354d3b; font-size: 13px; }
    .copyright { margin-top: 18px; padding-top: 14px; border-top: 1px solid #d1d5ca; color: #596057; font-size: 12px; }
    .float-tools { position: fixed; z-index: 15; right: 16px; bottom: 18px; display: grid; gap: 8px; }
    .float-tools a, .float-tools button { display: grid; place-items: center; width: 46px; min-height: 46px; padding: 5px; border: 1px solid #c9d0c3; border-radius: 50%; background: #fff; color: #28342b; text-decoration: none; font-size: 11px; cursor: pointer; box-shadow: 0 3px 12px rgba(0,0,0,.1); }
    .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; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .nav-links .nav-cta { margin-left: 4px; padding-inline: 10px; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 8px; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 10px 16px 16px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 10px 16px rgba(0,0,0,.06); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px 8px; font-size: 14px; }
      .nav-links .nav-cta { margin: 4px 0 0; text-align: center; }
      .hero { padding: 58px 0 40px; }
      .hero::before { right: 8%; top: 28px; width: 72px; height: 28px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); row-gap: 15px; margin-top: 38px; }
      .section { padding: 54px 0; }
      .about-layout, .solution-layout, .network, .resource-layout, .contact-layout { grid-template-columns: 1fr; gap: 24px; }
      .service-grid, .case-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
    }
    @media (max-width: 480px) {
      .hero-copy { font-size: 16px; }
      .service-grid, .case-grid, .review-grid { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .price-band { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .rating { align-items: flex-start; flex-direction: column; gap: 9px; }
    }