:root {
      color-scheme: light;
      --ink: #17251f;
      --muted: #5c6d64;
      --paper: #f8faf8;
      --white: #fff;
      --line: #dfe8e2;
      --green: #176b4a;
      --green-dark: #104d37;
      --lime: #d5f36a;
      --coral: #ef735d;
      --blue: #4e8fd1;
      --yellow: #f0c74c;
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; 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: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .brand img { width: 38px; height: 38px; object-fit: contain; }
    .brand-name { font-size: 18px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #41534a; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--green); }
    .nav-actions { display: flex; align-items: center; gap: 9px; flex: 0 0 auto; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); color: var(--ink); background: var(--white); border-radius: 7px; cursor: pointer; }
    .button { display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 46px; padding: 0 18px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; font-weight: 700; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; cursor: pointer; }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #fff; background: var(--green); box-shadow: 0 8px 18px rgba(23,107,74,.18); }
    .button-primary:hover { background: var(--green-dark); }
    .button-light { color: var(--green-dark); background: var(--white); border-color: #d7e3db; }
    .button-outline { border-color: rgba(255,255,255,.58); color: #fff; background: transparent; }
    .hero { position: relative; overflow: hidden; background: #eaf5ee; border-bottom: 1px solid #d5e7db; }
    .hero:before { content: ""; position: absolute; inset: 0; opacity: .5; background-image: linear-gradient(rgba(23,107,74,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(23,107,74,.06) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to right, #000, transparent 90%); }
    .hero:after { content: ""; position: absolute; right: -120px; top: -180px; width: 480px; aspect-ratio: 1; border: 1px solid rgba(23,107,74,.16); border-radius: 50%; box-shadow: 0 0 0 48px rgba(23,107,74,.035), 0 0 0 96px rgba(23,107,74,.025); }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 55px; align-items: center; padding-block: 82px 76px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1.4px; text-transform: uppercase; }
    .eyebrow:before { content: ""; width: 23px; height: 3px; background: var(--coral); }
    h1 { max-width: 700px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 620px; margin: 20px 0 25px; color: #4d6156; font-size: 17px; }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 11px; }
    .hero-note { margin: 17px 0 0; color: #597065; font-size: 13px; }
    .hero-board { position: relative; padding: 20px; background: rgba(255,255,255,.75); border: 1px solid #d2e4d8; border-radius: 10px; box-shadow: 0 20px 50px rgba(22,75,50,.09); animation: board-in .7s ease both; }
    .board-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 15px; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 800; }
    .live-mark { display: inline-flex; align-items: center; gap: 7px; color: var(--green); font-size: 11px; font-weight: 700; }
    .live-mark:before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #56b878; box-shadow: 0 0 0 4px #e0f3e5; }
    .model-list { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; padding: 17px 0; }
    .model-chip { padding: 10px 11px; border: 1px solid #e2eae4; border-radius: 5px; background: #fff; font-size: 12px; font-weight: 700; }
    .model-chip:nth-child(3n+1) { border-left: 3px solid var(--coral); }
    .model-chip:nth-child(3n+2) { border-left: 3px solid var(--blue); }
    .model-chip:nth-child(3n) { border-left: 3px solid #96b745; }
    .board-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 13px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .hero-metrics { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #d4e5da; }
    .metric { padding: 18px 20px 21px 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 21px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding-block: 76px; }
    .section-tint { background: #eff5f0; border-block: 1px solid #e1eae3; }
    .section-green { color: #fff; background: var(--green-dark); }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 25px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .section-kicker { margin: 0 0 9px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1.2px; }
    .section-green .section-kicker { color: var(--lime); }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { max-width: 650px; margin: 12px 0 0; color: var(--muted); }
    .section-green .section-intro { color: #d0e0d6; }
    .text-link { color: var(--green); font-weight: 750; white-space: nowrap; }
    .about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .about-copy p { margin: 0 0 14px; color: var(--muted); }
    .about-copy p:first-of-type { color: var(--ink); font-size: 18px; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; margin: 6px 0 0; padding: 0; list-style: none; }
    .capability-list li { display: flex; gap: 10px; padding: 13px 0; border-bottom: 1px solid var(--line); color: #40544a; font-size: 14px; }
    .capability-list li:before { content: "✓"; color: var(--green); font-weight: 900; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { position: relative; padding: 22px; background: #fff; border: 1px solid var(--line); border-radius: 7px; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #bdd7c6; box-shadow: 0 14px 30px rgba(30,74,51,.08); }
    .service-index { color: var(--coral); font-size: 11px; font-weight: 850; letter-spacing: 1px; }
    .service-item h3 { margin: 11px 0 7px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflow-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 32px; border-block: 1px solid rgba(255,255,255,.2); }
    .workflow-step { position: relative; padding: 24px 22px 24px 0; }
    .workflow-step + .workflow-step { padding-left: 22px; border-left: 1px solid rgba(255,255,255,.2); }
    .workflow-step span { display: block; color: var(--lime); font-size: 12px; font-weight: 800; }
    .workflow-step h3 { margin: 7px 0; font-size: 18px; }
    .workflow-step p { margin: 0; color: #d1e1d7; font-size: 13px; }
    .scenario-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .scenario-list li { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .scenario-list strong { display: block; margin-bottom: 4px; font-size: 14px; }
    .scenario-list span { display: block; color: var(--muted); font-size: 12px; }
    .network { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); align-items: center; gap: 45px; }
    .network-copy p { color: var(--muted); }
    .network-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 21px; }
    .network-point { padding: 13px 14px; background: #fff; border-left: 3px solid var(--yellow); font-size: 13px; font-weight: 700; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .model-cloud span { display: inline-flex; padding: 9px 12px; border: 1px solid #dbe6de; border-radius: 4px; background: #fff; color: #405349; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case-card { display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 20px; align-items: center; padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
    .case-card h3 { margin: 0 0 7px; font-size: 18px; }
    .case-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-card img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 4px; }
    .case-wide { grid-column: 1 / -1; grid-template-columns: 1fr 220px; }
    .case-wide img { aspect-ratio: 16 / 9; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
    .review p { margin: 0 0 18px; color: #405349; font-size: 14px; }
    .review footer { display: flex; justify-content: space-between; gap: 10px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .review footer strong { color: var(--ink); }
    .rating-layout { display: grid; grid-template-columns: 270px 1fr; gap: 24px; align-items: start; }
    .rating-summary { padding: 25px; color: var(--ink); background: var(--lime); border-radius: 7px; }
    .rating-summary p { margin: 0; font-size: 13px; font-weight: 800; }
    .rating-score { display: block; margin: 5px 0; font-size: 49px; font-weight: 850; line-height: 1.1; }
    .stars { color: #7b5c00; font-size: 20px; letter-spacing: 2px; }
    .rating-summary small { display: block; margin-top: 10px; color: #405129; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 620px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); font-size: 13px; }
    th { color: #34473c; background: #f0f5f1; font-size: 12px; }
    td { color: #53645b; }
    td:first-child { color: var(--ink); font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .table-highlight { color: var(--green-dark); font-weight: 750; }
    .request-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 45px; align-items: start; }
    .request-copy p { color: var(--muted); }
    .request-aside { margin-top: 25px; padding-top: 19px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 7px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #33473c; font-size: 13px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; min-height: 45px; padding: 10px 12px; border: 1px solid #cad8ce; border-radius: 5px; color: var(--ink); background: #fff; outline: none; }
    .field textarea { min-height: 116px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(23,107,74,.1); }
    .form-foot { display: flex; align-items: center; gap: 14px; margin-top: 17px; }
    .form-message { min-height: 22px; color: var(--green-dark); font-size: 13px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 40px 17px 0; font-weight: 750; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary:after { content: "+"; position: absolute; right: 5px; top: 14px; color: var(--green); font-size: 22px; font-weight: 400; transition: transform .2s ease; }
    details[open] summary:after { transform: rotate(45deg); }
    details p { max-width: 820px; margin: -2px 0 18px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { display: flex; min-height: 110px; flex-direction: column; justify-content: space-between; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 6px; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { transform: translateY(-3px); border-color: #a9cbb4; }
    .article-link span { color: var(--green); font-size: 11px; font-weight: 800; }
    .article-link strong { font-size: 14px; line-height: 1.45; }
    .contact-strip { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 25px; padding-block: 28px; border-top: 1px solid var(--line); }
    .contact-strip p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
    .footer-main { padding-block: 37px 22px; background: #e9f0eb; border-top: 1px solid #d9e4dc; }
    .footer-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 35px; }
    .footer-brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 850; }
    .footer-brand img { width: 36px; height: 36px; object-fit: contain; }
    .footer-copy { max-width: 490px; margin: 12px 0; color: #56665d; font-size: 13px; }
    .contact-details { display: flex; flex-wrap: wrap; gap: 8px 18px; color: #35493e; font-size: 13px; }
    .contact-details a { text-decoration: underline; text-underline-offset: 3px; }
    .qr-block { display: flex; align-items: center; justify-content: flex-end; gap: 15px; }
    .qr-block img { width: 94px; height: 94px; object-fit: contain; border: 1px solid #d1ddd4; background: #fff; }
    .qr-block p { margin: 0; color: #43554b; font-size: 13px; }
    .friend-links { display: flex; flex-wrap: wrap; gap: 9px 18px; padding: 17px 0; border-top: 1px solid #d3ded6; }
    .friend-links a { color: #43584b; font-size: 12px; text-decoration: underline; text-underline-offset: 3px; }
    .footer-bottom { padding: 13px 0 17px; border-top: 1px solid #d3ded6; color: #53645a; font-size: 12px; }
    .float-actions { position: fixed; z-index: 18; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-actions a { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid #d0e0d5; border-radius: 50%; color: var(--green-dark); background: #fff; box-shadow: 0 7px 20px rgba(16,77,55,.14); font-size: 11px; font-weight: 800; transition: transform .2s ease; }
    .float-actions a:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes board-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
    @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: 7px; font-size: 12px; }
      .nav-actions .button { padding-inline: 12px; }
      .hero-inner { gap: 30px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .scenario-list { grid-template-columns: repeat(3, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .nav-actions { margin-left: auto; }
      .nav-actions > .button { display: none; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-links { display: none; position: absolute; top: 63px; left: 0; right: 0; align-items: stretch; flex-direction: column; padding: 9px 16px 14px; border-bottom: 1px solid var(--line); background: var(--paper); box-shadow: 0 12px 20px rgba(25,55,38,.08); }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 10px 4px; border-bottom: 1px solid #e7ede8; font-size: 14px; }
      .hero-inner { grid-template-columns: 1fr; padding-block: 58px 40px; }
      .hero-board { max-width: 480px; }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .metric { padding-block: 15px; border-bottom: 1px solid #d4e5da; }
      .section { padding-block: 58px; }
      .section-head { align-items: start; flex-direction: column; gap: 12px; }
      .about-layout, .network, .request-layout { grid-template-columns: 1fr; gap: 25px; }
      .workflow-band { grid-template-columns: repeat(2, 1fr); }
      .workflow-step { padding: 19px 14px 19px 0; }
      .workflow-step + .workflow-step { padding-left: 14px; }
      .workflow-step:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.2); }
      .workflow-step:nth-child(4) { border-top: 1px solid rgba(255,255,255,.2); }
      .scenario-list { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .rating-layout { grid-template-columns: 1fr; }
      .rating-summary { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 0 16px; }
      .rating-summary p { grid-column: 1 / -1; }
      .rating-score { margin: 4px 0; }
      .rating-summary small { grid-column: 1 / -1; }
      .case-card { grid-template-columns: minmax(0, 1fr) 145px; }
      .case-wide { grid-template-columns: minmax(0, 1fr) 180px; }
      .footer-grid { grid-template-columns: 1fr; gap: 20px; }
      .qr-block { justify-content: flex-start; }
      .contact-strip { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      .brand-name { font-size: 16px; }
      .brand img { width: 34px; height: 34px; }
      .hero-inner { padding-top: 45px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .hero-buttons .button { flex: 1 1 100%; }
      .service-grid, .review-grid, .case-grid { grid-template-columns: 1fr; }
      .case-card, .case-wide { grid-column: auto; grid-template-columns: minmax(0, 1fr) 112px; gap: 13px; padding: 14px; }
      .case-card img, .case-wide img { aspect-ratio: 1 / 1; }
      .case-card h3 { font-size: 16px; }
      .case-card p { font-size: 12px; }
      .scenario-list { grid-template-columns: 1fr 1fr; gap: 0 15px; }
      .capability-list { grid-template-columns: 1fr; }
      .network-points { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .article-link { min-height: 100px; padding: 13px; }
      .form-grid { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .workflow-step h3 { font-size: 16px; }
      .float-actions { right: 11px; bottom: 12px; }
      .float-actions a { width: 43px; height: 43px; }
    }