:root {
      color-scheme: light;
      --ink: #17231d;
      --muted: #5e6c63;
      --green: #287b45;
      --green-dark: #175c34;
      --lime: #c7f06b;
      --paper: #f7faf7;
      --line: #dce6dc;
      --white: #fff;
      --coral: #e88864;
      --blue: #4f7fa4;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    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(247,250,247,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .brand img { width: 40px; max-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: 9px 10px; color: #425148; font-size: 13px; text-decoration: none; border-radius: 5px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--green-dark); background: #e8f2e8; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 11px 18px; border: 1px solid var(--green); border-radius: 5px; background: var(--green); color: #fff; font-weight: 700; text-decoration: none; cursor: pointer; transition: transform .18s, background .18s, box-shadow .18s; }
    .nav-cta { min-height: 40px; padding: 8px 13px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { background: var(--green-dark); box-shadow: 0 7px 18px rgba(23,92,52,.16); transform: translateY(-2px); }
    .button-secondary { color: var(--green-dark); background: #fff; }
    .button-secondary:hover { color: #fff; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); cursor: pointer; }
    .menu-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; background: currentColor; }
    .hero { position: relative; overflow: hidden; padding: 74px 0 48px; background: #eaf4e8; border-bottom: 1px solid #d6e5d5; }
    .hero::before { content: ""; position: absolute; inset: 0 0 auto; height: 8px; background: linear-gradient(90deg, var(--green), var(--lime), #70b6a1); }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr); gap: 54px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 20px; height: 2px; background: var(--green); }
    h1 { max-width: 720px; margin: 16px 0 18px; font-size: clamp(38px, 5.2vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 620px; margin: 0; color: #43534a; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 18px; color: var(--muted); font-size: 13px; }
    .hero-panel { padding: 26px; border: 1px solid #c8ddc7; border-radius: 6px; background: rgba(255,255,255,.72); box-shadow: 0 16px 38px rgba(37,83,48,.08); }
    .hero-panel h2 { margin: 0 0 18px; font-size: 18px; }
    .capability-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
    .capability-list li { display: flex; justify-content: space-between; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); color: #34443a; font-size: 14px; }
    .capability-list strong { color: var(--green-dark); font-size: 13px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 44px; border-top: 1px solid #cdddc9; }
    .metric { padding: 18px 20px 0 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 21px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section-tint { background: #eef4ed; border-block: 1px solid #e0e9dd; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { margin: 8px 0 0; font-size: clamp(27px, 3vw, 38px); line-height: 1.22; }
    .section-head p { max-width: 540px; margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 52px; align-items: start; }
    .intro-copy p { margin: 0 0 16px; color: #45544b; }
    .feature-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 22px; margin: 24px 0 0; padding: 0; list-style: none; }
    .feature-points li { padding: 12px 0; border-top: 1px solid var(--line); font-weight: 650; }
    .feature-points li::before { content: "✓"; margin-right: 10px; color: var(--green); font-weight: 900; }
    .visual-stack { display: grid; gap: 14px; }
    .visual-stack img, .case-grid img { display: block; width: 100%; border-radius: 5px; border: 1px solid var(--line); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { padding: 21px; border: 1px solid var(--line); border-radius: 5px; background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
    .service-item:hover { transform: translateY(-4px); border-color: #a5c7a3; box-shadow: 0 12px 28px rgba(31,69,39,.09); }
    .service-item .tag { color: var(--green-dark); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 7px 0; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-more { margin-top: 22px; padding-top: 19px; border-top: 1px solid var(--line); color: #46564c; font-size: 14px; }
    .service-more strong { color: var(--ink); }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 0 22px 0 0; counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--green); font-size: 14px; font-weight: 900; }
    .step:not(:last-child)::after { content: ""; position: absolute; top: 11px; left: 42px; right: 20px; height: 1px; background: #c5d8c4; }
    .step h3 { margin: 0 0 7px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 44px; }
    .industry-row { display: grid; grid-template-columns: 120px 1fr; gap: 18px; padding: 17px 0; border-top: 1px solid var(--line); }
    .industry-row strong { color: var(--green-dark); }
    .industry-row span { color: var(--muted); font-size: 14px; }
    .network-band { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; padding: 30px; background: #dff0da; border-left: 5px solid var(--green); }
    .network-band h3 { margin: 0 0 8px; font-size: 22px; }
    .network-band p { margin: 0; color: #44554a; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 7px 10px; border: 1px solid #c3d9bf; border-radius: 4px; background: #f8fcf7; color: #304637; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case-item { overflow: hidden; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    .case-item img { aspect-ratio: 16 / 10; object-fit: cover; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
    .case-copy { padding: 17px; }
    .case-copy h3 { margin: 0 0 5px; font-size: 17px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .rating-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 28px; align-items: start; }
    .rating-summary { padding: 24px; color: #fff; background: var(--green-dark); border-radius: 5px; }
    .rating-summary small { color: #d8edcc; font-weight: 700; }
    .rating-number { margin: 8px 0 0; font-size: 54px; font-weight: 850; line-height: 1.1; }
    .stars { color: var(--lime); font-size: 22px; letter-spacing: 0; }
    .rating-summary p { margin: 13px 0 0; color: #e4f0e1; font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { min-width: 130px; padding: 12px 14px; border-bottom: 1px solid #e7ede6; font-size: 13px; }
    th { color: #314137; background: #eef4ed; }
    td:last-child { color: var(--green-dark); font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; border-top: 3px solid #8abf55; background: #fff; }
    .review blockquote { margin: 0 0 16px; color: #3d4b42; font-size: 14px; }
    .review cite { color: var(--muted); font-size: 12px; font-style: normal; font-weight: 700; }
    .faq-list { max-width: 900px; 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: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 12px; color: var(--green); font-size: 24px; transition: transform .2s; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 780px; margin: 0; padding: 0 30px 18px 0; color: var(--muted); font-size: 14px; }
    .article-links { display: flex; flex-wrap: wrap; gap: 10px; }
    .article-links a { padding: 10px 13px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--green-dark); font-size: 13px; text-decoration: none; }
    .article-links a:hover { border-color: var(--green); }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-info h3 { margin-top: 0; font-size: 22px; }
    .contact-info p { color: var(--muted); }
    .contact-list { margin: 20px 0; padding: 0; list-style: none; }
    .contact-list li { padding: 7px 0; color: #415047; }
    .qr { width: 144px; padding: 7px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #cbd8ca; border-radius: 4px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #a8d486; border-color: var(--green); }
    .form-note { grid-column: 1 / -1; margin: -4px 0 0; color: var(--muted); font-size: 12px; }
    .footer { padding: 28px 0; color: #e4eee3; background: #183b28; }
    .footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
    .footer a { color: #e4eee3; text-decoration: none; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 12px; }
    .footer small { color: #c1d2c3; }
    .float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .float-contact a, .to-top { display: grid; place-items: center; min-width: 46px; min-height: 46px; padding: 8px; border: 1px solid var(--green-dark); border-radius: 5px; background: var(--green-dark); color: #fff; font-size: 12px; font-weight: 700; text-decoration: none; box-shadow: 0 5px 16px rgba(20,53,31,.2); }
    .to-top { display: none; border: 0; cursor: pointer; }
    .to-top.visible { display: grid; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
    .reveal.in-view { 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 { gap: 12px; }
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 12px 20px 18px; border-bottom: 1px solid var(--line); background: var(--paper); }
      .nav-links.open { display: flex; justify-content: flex-start; }
      .menu-toggle { display: block; margin-left: auto; }
      .hero-inner, .intro-grid { grid-template-columns: 1fr; gap: 30px; }
      .hero-panel { max-width: 620px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .section-head { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .nav { min-height: 66px; }
      .brand img { width: 34px; max-height: 34px; }
      .nav-cta { padding: 7px 10px; font-size: 12px; }
      .nav-links { top: 66px; }
      .nav-links a { width: calc(50% - 6px); }
      .hero { padding: 54px 0 34px; }
      .hero-inner { gap: 26px; }
      .hero-copy { font-size: 15px; }
      .metrics { grid-template-columns: repeat(2, 1fr); row-gap: 17px; }
      .metric { padding-right: 8px; }
      .section { padding: 54px 0; }
      .feature-points, .service-grid, .industry-grid, .case-grid, .reviews, .rating-layout, .contact-layout, .network-band { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
      .step:not(:last-child)::after { display: none; }
      .industry-row { grid-template-columns: 100px 1fr; gap: 12px; }
      .network-band { padding: 22px; gap: 24px; }
      .form { grid-template-columns: 1fr; }
      .field-full, .form-note { grid-column: auto; }
      .footer-inner { align-items: flex-start; flex-direction: column; gap: 12px; }
      .float-contact { right: 10px; bottom: 10px; }
    }