:root {
      color-scheme: light;
      --ink: #202621;
      --muted: #606a63;
      --paper: #f7f8f6;
      --white: #fff;
      --line: #dfe5df;
      --green: #c9f45b;
      --green-deep: #41651b;
      --red: #f1644d;
      --blue: #b9e5f3;
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    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; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { display: block; max-width: 100%; height: auto; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(247,248,246,.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: 24px; }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
    .ai-page-logo { width: 142px; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 10px 11px; color: #445048; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--green-deep); }
    .nav-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); padding: 9px 12px; cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 18px; border: 1px solid var(--ink); background: var(--ink); color: #fff; font-weight: 700; transition: transform .2s ease, background .2s ease; }
    .button:hover { transform: translateY(-2px); background: #374139; }
    .button-lime { border-color: var(--green); background: var(--green); color: #202621; }
    .button-lime:hover { background: #b6e545; }
    .button-quiet { background: transparent; color: var(--ink); }
    .hero { position: relative; overflow: hidden; background: var(--green); }
    .hero:after { content: ""; position: absolute; width: 310px; height: 310px; right: max(5%, calc((100vw - var(--max))/2)); top: 48px; border: 1px solid rgba(32,38,33,.22); border-radius: 50%; box-shadow: 0 0 0 42px rgba(32,38,33,.04), 0 0 0 84px rgba(32,38,33,.035); pointer-events: none; }
    .hero-inner { position: relative; z-index: 1; padding-block: 78px 58px; }
    .eyebrow { margin: 0 0 16px; color: #334225; font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 760px; margin: 0; font-size: clamp(42px, 7vw, 76px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 630px; margin: 22px 0 28px; font-size: 18px; color: #303a2b; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-foot { display: flex; flex-wrap: wrap; gap: 12px 30px; margin-top: 52px; padding-top: 18px; border-top: 1px solid rgba(32,38,33,.28); color: #34422c; font-size: 13px; }
    .hero-foot strong { color: var(--ink); }
    .section { padding-block: 76px; }
    .section-top { display: flex; align-items: end; justify-content: space-between; gap: 26px; margin-bottom: 30px; }
    .section-top > div { max-width: 700px; }
    .kicker { margin: 0 0 8px; color: var(--green-deep); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.18; letter-spacing: 0; }
    .section-intro { max-width: 560px; margin: 12px 0 0; color: var(--muted); }
    .band-white { background: var(--white); }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: start; }
    .intro-grid p { margin: 0 0 16px; color: var(--muted); }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; }
    .capability-list div { padding: 13px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .capability-list span { display: block; color: var(--muted); font-size: 13px; font-weight: 400; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
    .service-item { min-height: 172px; padding: 22px; background: var(--white); border: 1px solid var(--line); transition: transform .2s ease, border-color .2s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #a9c968; }
    .service-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .index { display: block; margin-bottom: 17px; color: var(--red); font-size: 12px; font-weight: 800; }
    .model-strip { margin-top: 24px; padding: 22px; background: #eef3e8; }
    .model-strip h3 { margin: 0 0 14px; font-size: 16px; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag { padding: 5px 10px; border: 1px solid #d8e1d2; background: #fff; color: #39443d; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .step { padding: 24px 22px 24px 0; }
    .step + .step { padding-left: 22px; border-left: 1px solid var(--line); }
    .step b { display: block; margin-bottom: 10px; color: var(--red); font-size: 13px; }
    .step h3 { margin: 0 0 7px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 34px; align-items: start; }
    .solution-layout > div:first-child p { color: var(--muted); }
    .solution-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
    .solution-list li { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .solution-list strong { display: inline-block; min-width: 110px; }
    .accent-panel { padding: 26px; background: var(--blue); }
    .accent-panel h3 { margin: 0 0 12px; font-size: 21px; }
    .accent-panel p { margin: 0 0 18px; color: #35474b; }
    .metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 26px; }
    .metric { padding: 15px 0; border-top: 2px solid var(--ink); }
    .metric strong { display: block; font-size: 20px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .image-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 14px; align-items: start; }
    .image-grid img { width: 100%; border: 1px solid var(--line); background: #edf0eb; }
    .image-grid figure { margin: 0; }
    .image-grid figcaption { padding-top: 9px; color: var(--muted); font-size: 13px; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--white); }
    table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    th, td { padding: 15px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eef3e8; font-size: 13px; }
    td { color: #505a53; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-bottom: 22px; }
    .rating strong { font-size: 31px; }
    .stars { color: #c04d2f; font-size: 20px; letter-spacing: 0; }
    .rating span:last-child { color: var(--muted); }
    .review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
    .review { padding: 20px; border-top: 3px solid var(--red); background: var(--white); }
    .review p { margin: 0 0 16px; color: #424d45; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 0; font-weight: 700; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary:after { content: "+"; position: absolute; right: 4px; top: 14px; color: var(--green-deep); font-size: 20px; }
    details[open] summary:after { content: "−"; }
    details p { max-width: 850px; margin: 0 0 18px; color: var(--muted); }
    .article-links { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; }
    .article-links a { padding: 15px; border: 1px solid var(--line); background: var(--white); font-size: 13px; transition: border-color .2s ease; }
    .article-links a:hover { border-color: var(--green-deep); }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-details { margin-top: 22px; }
    .contact-details p { margin: 8px 0; color: var(--ink); }
    .contact-details a { text-decoration: underline; text-underline-offset: 3px; }
    .qr { width: 132px; margin-top: 18px; border: 1px solid var(--line); }
    form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; border: 1px solid #cdd5ce; border-radius: 0; padding: 11px 12px; background: #fff; color: var(--ink); }
    textarea { min-height: 120px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid #9fc84c; outline-offset: 1px; }
    .form-note { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 12px; }
    .site-footer { background: #e8ede6; color: #29332c; padding-block: 32px; }
    .footer-top { display: flex; justify-content: space-between; gap: 28px; align-items: start; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; max-width: 690px; font-size: 13px; }
    .footer-links a { text-decoration: underline; text-underline-offset: 3px; }
    .copyright { margin: 22px 0 0; padding-top: 16px; border-top: 1px solid #cfd8cf; color: #566159; font-size: 12px; }
    .float-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; }
    .float-contact a { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 15px; background: var(--red); color: #fff; font-size: 13px; font-weight: 700; box-shadow: 0 5px 18px rgba(32,38,33,.16); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 12px 20px 18px; border-bottom: 1px solid var(--line); background: var(--paper); flex-wrap: wrap; }
      .nav-links.is-open { display: flex; }
      .nav-links a { flex: 1 1 28%; }
      .menu-toggle { display: inline-flex; }
      .nav-actions .button-quiet { display: none; }
      .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .article-links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .nav-row { min-height: 64px; gap: 10px; }
      .ai-page-logo { width: 122px; }
      .nav-links { top: 64px; }
      .nav-actions { gap: 7px; }
      .nav-actions .button { min-height: 40px; padding-inline: 11px; font-size: 12px; }
      .hero-inner { padding-block: 58px 34px; }
      .hero:after { width: 180px; height: 180px; top: 45px; right: -55px; }
      .hero-copy { font-size: 16px; }
      .hero-foot { margin-top: 36px; }
      .section { padding-block: 54px; }
      .section-top { display: block; }
      .section-top .button { margin-top: 18px; }
      .intro-grid, .solution-layout, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
      .service-grid { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step, .step + .step { padding: 18px 12px 18px 0; border-left: 0; }
      .step:nth-child(even) { padding-left: 14px; border-left: 1px solid var(--line); }
      .image-grid { grid-template-columns: 1fr 1fr; }
      .image-grid figure:first-child { grid-column: 1 / -1; }
      .review-grid { grid-template-columns: 1fr; }
      .article-links { grid-template-columns: 1fr 1fr; }
      form { grid-template-columns: 1fr; }
      .field-wide, .form-note { grid-column: auto; }
      .footer-top { flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
      .metrics { gap: 8px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }