:root {
      color-scheme: light;
      --ink: #1c2423;
      --muted: #56615d;
      --paper: #f8f8f5;
      --white: #fff;
      --line: #dce2dc;
      --green: #c8f169;
      --green-dark: #294d1f;
      --coral: #ff684d;
      --blue: #b9ddff;
      --yellow: #ffe16a;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans 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 { border-bottom: 1px solid var(--line); background: var(--paper); }
    .nav-shell { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 850; white-space: nowrap; }
    .brand img { display: block; width: 40px; height: 40px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #3f4a45; font-size: 13px; text-decoration: none; transition: color .2s ease; }
    .nav-links a:hover { color: #a63d2d; }
    .nav-cta, .button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 9px; padding: 0 19px; border: 1px solid var(--ink); border-radius: 4px; background: var(--ink); color: #fff; text-decoration: none; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .nav-cta { min-height: 40px; padding-inline: 14px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 4px 4px 0 var(--coral); }
    .button-light { border-color: var(--ink); background: var(--white); color: var(--ink); }
    .button-green { border-color: var(--green); background: var(--green); color: var(--ink); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: var(--white); color: var(--ink); cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 74px 0 52px; background: var(--green); }
    .hero::before, .hero::after { position: absolute; z-index: 0; content: ""; pointer-events: none; }
    .hero::before { width: 280px; height: 280px; right: -60px; top: -115px; border: 2px solid rgba(28,36,35,.22); border-radius: 50%; }
    .hero::after { width: 154px; height: 154px; right: 80px; bottom: -88px; background: var(--coral); transform: rotate(22deg); }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr); align-items: center; gap: 52px; }
    .eyebrow { margin: 0 0 13px; color: #3f5d24; font-size: 12px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
    h1 { max-width: 730px; margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 22px 0 25px; color: #33432d; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 16px 0 0; color: #40523a; font-size: 13px; }
    .hero-aside { position: relative; padding: 24px; border: 1px solid rgba(28,36,35,.25); background: rgba(255,255,255,.52); }
    .hero-aside strong { display: block; margin-bottom: 15px; font-size: 19px; }
    .hero-aside p { margin: 0; color: #3d4a39; font-size: 14px; }
    .model-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .model-tags span, .tag { display: inline-flex; align-items: center; padding: 5px 9px; border: 1px solid rgba(28,36,35,.22); border-radius: 3px; color: #27332b; background: rgba(255,255,255,.65); font-size: 12px; font-weight: 700; }
    .section { padding: 76px 0; }
    .section-tint { background: #eff3ec; }
    .section-dark { background: #1c2423; color: #fff; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 32px; }
    .section-head > div { max-width: 700px; }
    .section-kicker { margin: 0 0 8px; color: #a63d2d; font-size: 12px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(28px, 3.4vw, 42px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { max-width: 590px; margin: 12px 0 0; color: var(--muted); }
    .section-dark .section-kicker { color: var(--green); }
    .section-dark .section-intro { color: #c5cfca; }
    .text-link { color: #813528; font-weight: 750; text-decoration-thickness: 1px; text-underline-offset: 4px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); background: var(--white); }
    .metric { min-height: 126px; padding: 24px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-size: 27px; line-height: 1.2; }
    .metric span { display: block; margin-top: 9px; color: var(--muted); font-size: 13px; }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 48px; }
    .about-copy { max-width: 600px; color: var(--muted); }
    .about-copy p { margin: 0 0 14px; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; }
    .feature-list div { padding: 15px 0; border-top: 1px solid var(--line); }
    .feature-list strong { display: block; margin-bottom: 4px; }
    .feature-list span { color: var(--muted); font-size: 13px; }
    .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service { min-height: 190px; padding: 21px; border: 1px solid var(--line); background: var(--white); transition: transform .2s ease, box-shadow .2s ease; }
    .service:hover, .review:hover, .case:hover { transform: translateY(-3px); box-shadow: 4px 4px 0 var(--green); }
    .service-number { color: #a63d2d; font-size: 12px; font-weight: 850; }
    .service h3, .case h3 { margin: 10px 0 7px; font-size: 18px; }
    .service p, .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 18px 20px 15px 0; border-top: 2px solid var(--ink); counter-increment: step; }
    .step::before { display: block; width: 32px; height: 32px; margin-top: -35px; margin-bottom: 20px; border-radius: 50%; background: var(--coral); color: var(--ink); content: counter(step); text-align: center; line-height: 32px; font-weight: 850; }
    .step h3 { margin: 0 0 7px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .solution { padding: 22px; border-left: 4px solid var(--coral); background: var(--white); }
    .solution:nth-child(2) { border-color: #5c9bd4; }
    .solution:nth-child(3) { border-color: #9abb41; }
    .solution h3 { margin: 0 0 8px; font-size: 17px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network { display: flex; flex-wrap: wrap; gap: 9px; }
    .network span { padding: 9px 13px; border: 1px solid #66716c; border-radius: 3px; color: #f5f7f4; font-size: 14px; }
    .network-note { margin: 18px 0 0; color: #c5cfca; font-size: 14px; }
    .showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .showcase-item { overflow: hidden; background: var(--white); }
    .showcase-item .media { overflow: hidden; aspect-ratio: 16 / 8; background: #e8ebe6; }
    .showcase-item img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .showcase-copy { padding: 19px 21px 21px; }
    .showcase-copy h3 { margin: 0 0 6px; font-size: 19px; }
    .showcase-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .product-media { display: grid; grid-template-columns: 180px 1fr; gap: 24px; align-items: center; margin-top: 24px; padding: 20px; border: 1px solid var(--line); background: var(--white); }
    .product-media .media { overflow: hidden; aspect-ratio: 1; background: #e8ebe6; }
    .product-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .product-media p { margin: 0; color: var(--muted); }
    .comparison-wrap { overflow-x: auto; border: 1px solid #4d5953; }
    .comparison { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 15px 17px; border-bottom: 1px solid #46514c; vertical-align: top; }
    .comparison th { background: #2a3330; color: #fff; font-size: 13px; }
    .comparison td { color: #e6ebe7; font-size: 14px; }
    .comparison tbody tr:last-child td { border-bottom: 0; }
    .score-box { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 20px; padding: 19px 22px; background: var(--green); color: var(--ink); }
    .score-box strong { font-size: 25px; }
    .score-box span { font-weight: 800; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
    .review { padding: 20px; border: 1px solid var(--line); background: var(--white); transition: transform .2s ease, box-shadow .2s ease; }
    .review blockquote { margin: 0 0 18px; color: #34403a; font-size: 14px; }
    .review cite { color: #59655f; font-size: 12px; font-style: normal; font-weight: 750; }
    .review-mark { margin-bottom: 9px; color: #a63d2d; letter-spacing: 0; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { color: #a63d2d; content: "+"; font-size: 22px; line-height: 1; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 840px; margin: 0 0 18px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; border-top: 1px solid var(--line); }
    .article-list a { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 17px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-weight: 700; }
    .article-list a span:last-child { color: #a63d2d; }
    .contact-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 46px; align-items: start; }
    .contact-details { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
    .contact-details p { margin: 0 0 8px; color: var(--muted); font-size: 14px; }
    .contact-details a { color: var(--ink); font-weight: 700; }
    .form-grid { 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%; min-height: 45px; padding: 10px 12px; border: 1px solid #cbd3cc; border-radius: 3px; background: var(--white); color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .form-note { margin: 10px 0 0; color: var(--muted); font-size: 12px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 25px; background: var(--yellow); }
    .join-band h2 { font-size: 26px; }
    .join-band p { margin: 7px 0 0; color: #495044; }
    .site-footer { padding: 32px 0 25px; background: #e9ede7; color: var(--ink); }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 28px; padding-bottom: 21px; border-bottom: 1px solid #cbd3cc; }
    .footer-top p { max-width: 480px; margin: 9px 0 0; color: var(--muted); font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 460px; }
    .footer-links a { color: #35423b; font-size: 13px; text-decoration: none; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 14px; padding-top: 16px; color: #536059; font-size: 12px; }
    .float-tools { position: fixed; z-index: 20; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .float-tools a, .float-tools button { display: inline-flex; min-width: 48px; min-height: 46px; align-items: center; justify-content: center; padding: 0 12px; border: 1px solid var(--ink); border-radius: 3px; background: var(--white); color: var(--ink); font-size: 12px; font-weight: 750; text-decoration: none; cursor: pointer; box-shadow: 2px 2px 0 var(--green); }
    .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-shell { flex-wrap: wrap; padding-block: 12px; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; margin-left: auto; }
      .nav-links { display: none; width: 100%; justify-content: flex-start; padding: 8px 0 3px; border-top: 1px solid var(--line); }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 12px 8px 0; }
      .nav-cta { margin-left: 0; }
      .hero-grid { gap: 30px; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-shell { min-height: 66px; }
      .brand img { width: 34px; height: 34px; }
      .nav-cta { min-height: 38px; padding-inline: 11px; font-size: 12px; }
      .nav-links { gap: 0 12px; }
      .hero { padding: 53px 0 38px; }
      .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 27px; }
      .hero-copy { font-size: 15px; }
      .hero-aside { max-width: 100%; }
      .section { padding: 56px 0; }
      .section-head { display: block; margin-bottom: 24px; }
      .section-head .text-link { display: inline-block; margin-top: 12px; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric { min-height: 105px; padding: 18px; border-bottom: 1px solid var(--line); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(n+3) { border-bottom: 0; }
      .metric strong { font-size: 23px; }
      .feature-list { grid-template-columns: 1fr; }
      .services-grid, .solution-grid, .reviews { grid-template-columns: 1fr; }
      .service { min-height: auto; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
      .step { padding-right: 6px; }
      .showcase { grid-template-columns: 1fr; }
      .product-media { grid-template-columns: 110px 1fr; gap: 15px; padding: 14px; }
      .score-box { align-items: flex-start; flex-direction: column; gap: 3px; }
      .article-list { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .join-band, .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; }
      .join-band h2 { font-size: 22px; }
      .float-tools { right: 10px; bottom: 10px; }
      .float-tools a, .float-tools button { min-width: 43px; min-height: 42px; padding-inline: 9px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }

#wechat-dialog { width: min(360px, calc(100% - 32px)); padding: 0; border: 1px solid var(--line); border-radius: 4px; background: var(--white); color: var(--ink); }
    #wechat-dialog::backdrop { background: rgba(22, 29, 25, .48); }
    .dialog-inner { position: relative; padding: 24px; text-align: center; }
    .dialog-inner h2 { margin: 0 0 16px; font-size: 22px; }
    .dialog-inner img { display: block; width: min(230px, 100%); height: auto; margin: auto; }
    .dialog-inner p { margin: 12px 0 0; color: var(--muted); }
    .dialog-close { position: absolute; top: 10px; right: 12px; border: 0; background: none; color: var(--ink); font-size: 25px; cursor: pointer; }