:root {
      color-scheme: light;
      --ink: #18251f;
      --muted: #58665f;
      --paper: #f8faf8;
      --white: #fff;
      --line: #dfe7e1;
      --green: #17694e;
      --green-dark: #104c3b;
      --lime: #d8f36a;
      --coral: #f1775b;
      --blue: #5c8bd8;
      --yellow: #f5c84c;
      --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", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    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 { position: sticky; top: 0; z-index: 20; background: rgba(248,250,248,.94); border-bottom: 1px solid rgba(223,231,225,.9); backdrop-filter: blur(14px); }
    .nav { display: flex; align-items: center; justify-content: space-between; gap: 22px; min-height: 72px; }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; gap: 10px; font-weight: 800; font-size: 17px; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; color: #46544c; font-size: 13px; }
    .nav-links a { padding: 9px 8px; border-radius: 5px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--green); background: #eaf2ec; }
    .nav-actions { display: flex; align-items: center; gap: 9px; flex: 0 0 auto; }
    .menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 5px; background: var(--white); color: var(--ink); cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 4px; background: var(--green); color: white; font-weight: 700; transition: transform .18s, background .18s, box-shadow .18s; cursor: pointer; }
    .button:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 7px 18px rgba(23,105,78,.18); }
    .button-outline { background: transparent; color: var(--green-dark); border-color: #9eb7a7; }
    .button-outline:hover { background: #eaf2ec; color: var(--green-dark); box-shadow: none; }
    .button-lime { background: var(--lime); color: #243019; }
    .button-lime:hover { background: #cae858; color: #243019; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 54px; background: #eaf3eb; }
    .hero::before { position: absolute; content: ""; width: 420px; height: 420px; right: -100px; top: -190px; border: 1px solid rgba(23,105,78,.14); border-radius: 50%; box-shadow: 0 0 0 38px rgba(23,105,78,.035), 0 0 0 78px rgba(23,105,78,.025); pointer-events: none; }
    .hero::after { position: absolute; content: ""; width: 170px; height: 170px; left: 8%; bottom: -123px; border: 1px solid rgba(241,119,91,.35); transform: rotate(45deg); pointer-events: none; }
    .hero-inner { position: relative; z-index: 1; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
    h1 { max-width: 760px; margin: 19px 0 16px; font-size: clamp(38px, 6vw, 68px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 660px; margin: 0; color: #4f5e55; font-size: 17px; }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 26px; }
    .hero-foot { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 29px; color: #53645a; font-size: 13px; }
    .hero-foot span { display: inline-flex; align-items: center; gap: 8px; }
    .hero-foot span::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--coral); }
    .section { padding: 66px 0; }
    .section-tint { background: #f0f5ef; }
    .section-dark { background: var(--green-dark); color: #f5f8f3; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 27px; }
    .section-heading > div { max-width: 720px; }
    .section-kicker { margin: 0 0 7px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
    .section-dark .section-kicker { color: var(--lime); }
    h2 { margin: 0; font-size: clamp(26px, 4vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { max-width: 640px; margin: 10px 0 0; color: var(--muted); }
    .section-dark .section-intro { color: #d0ddd3; }
    .text-link { color: var(--green); font-weight: 750; white-space: nowrap; }
    .text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); background: var(--white); }
    .metric { padding: 24px 22px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; margin-bottom: 4px; color: var(--green-dark); font-size: 27px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    .intro-layout { display: grid; grid-template-columns: 1.1fr .9fr; align-items: start; gap: 52px; }
    .intro-copy { max-width: 680px; color: var(--muted); }
    .intro-copy p { margin: 0 0 15px; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 22px 0 0; padding: 0; list-style: none; }
    .capability-list li { padding: 12px 0; border-bottom: 1px solid var(--line); color: #34453b; font-weight: 650; }
    .capability-list li::before { content: "↗"; margin-right: 10px; color: var(--coral); }
    .platform-stack { padding: 23px; border-left: 4px solid var(--coral); background: #fff; }
    .platform-stack h3 { margin: 0 0 8px; font-size: 18px; }
    .platform-stack p { margin: 0; color: var(--muted); font-size: 14px; }
    .model-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .model-tags span { padding: 5px 10px; border: 1px solid #d9e5db; border-radius: 3px; background: #f7faf6; color: #354a3c; font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 25px; border-top: 1px solid var(--line); }
    .service-item { padding: 22px 5px 23px 0; border-bottom: 1px solid var(--line); transition: transform .2s; }
    .service-item:hover { transform: translateY(-3px); }
    .service-top { display: flex; align-items: center; gap: 11px; margin-bottom: 8px; }
    .service-mark { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 50%; background: #e4f0e7; color: var(--green); font-weight: 800; }
    .service-item:nth-child(3n+2) .service-mark { background: #fff0e9; color: #b84c35; }
    .service-item:nth-child(3n) .service-mark { background: #fff4d9; color: #805e06; }
    .service-item h3 { margin: 0; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
    .workflow-step { position: relative; padding: 20px 18px 16px; border-top: 2px solid #86a997; background: rgba(255,255,255,.72); }
    .workflow-step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 17px; color: var(--coral); font-size: 13px; font-weight: 850; }
    .workflow-step h3 { margin: 0 0 7px; font-size: 16px; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
    .solution-copy { padding: 8px 0; }
    .solution-copy h3 { margin: 0 0 10px; font-size: 23px; }
    .solution-copy p { margin: 0 0 18px; color: var(--muted); }
    .solution-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; margin: 0; padding: 0; list-style: none; }
    .solution-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .solution-list li::before { content: "＋"; margin-right: 8px; color: var(--green); }
    .network-band { display: grid; grid-template-columns: 1.1fr .9fr; gap: 35px; align-items: center; padding: 28px; background: var(--green-dark); color: #f6f8f4; }
    .network-band h3 { margin: 0 0 8px; font-size: 22px; }
    .network-band p { margin: 0; color: #d5e0d8; }
    .network-info { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-info span { padding: 7px 10px; border: 1px solid rgba(255,255,255,.25); color: #f6f8f4; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-item { overflow: hidden; background: #fff; border-bottom: 3px solid var(--green); }
    .case-item:nth-child(2) { border-color: var(--coral); }
    .case-item:nth-child(3) { border-color: var(--blue); }
    .case-media { display: grid; aspect-ratio: 16 / 9; place-items: center; padding: 18px; background: #eaf2ec; }
    .case-item:nth-child(2) .case-media { background: #fff0e9; }
    .case-item:nth-child(3) .case-media { background: #edf2fb; }
    .case-media img { display: block; max-width: 100%; width: 100%; height: auto; object-fit: contain; }
    .case-body { padding: 17px 18px 19px; }
    .case-body h3 { margin: 0 0 6px; font-size: 17px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 13px; }
    .review-score { display: flex; align-items: center; gap: 24px; margin-bottom: 24px; padding: 20px 24px; border-left: 4px solid var(--lime); background: rgba(255,255,255,.09); }
    .score-number { font-size: 40px; font-weight: 850; line-height: 1; }
    .score-number small { font-size: 16px; font-weight: 600; }
    .stars { color: var(--yellow); letter-spacing: 0; }
    .review-score p { margin: 4px 0 0; color: #d4e0d7; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid rgba(255,255,255,.22); }
    .comparison { width: 100%; min-width: 680px; border-collapse: collapse; background: rgba(255,255,255,.06); }
    .comparison th, .comparison td { padding: 13px 15px; border-bottom: 1px solid rgba(255,255,255,.16); text-align: left; vertical-align: top; }
    .comparison th { color: var(--lime); font-size: 13px; }
    .comparison td { color: #f2f6f2; font-size: 13px; }
    .comparison tr:last-child td { border-bottom: 0; }
    .comparison td:first-child { width: 22%; color: #dbe9df; font-weight: 700; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 22px; border-top: 1px solid var(--line); }
    .review { padding: 20px 0; border-bottom: 1px solid var(--line); }
    .review blockquote { margin: 0 0 15px; color: #3f4e45; font-size: 14px; }
    .review cite { color: var(--green); font-size: 12px; font-style: normal; font-weight: 750; }
    .review cite span { color: #77847b; font-weight: 500; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 34px 17px 0; font-weight: 700; cursor: pointer; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { position: absolute; top: 14px; right: 3px; content: "+"; color: var(--green); font-size: 22px; font-weight: 400; transition: transform .2s; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 800px; margin: 0; padding: 0 36px 18px 0; color: var(--muted); font-size: 14px; }
    .article-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { display: flex; justify-content: space-between; align-items: center; gap: 10px; min-height: 62px; padding: 13px; border: 1px solid var(--line); background: #fff; font-size: 13px; font-weight: 650; transition: border .2s, transform .2s; }
    .article-link:hover { transform: translateY(-2px); border-color: #8cac98; }
    .article-link span:last-child { color: var(--coral); }
    .knowledge { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
    .knowledge h3 { margin: 0 0 8px; font-size: 18px; }
    .knowledge p { margin: 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: start; }
    .contact-details { display: grid; gap: 13px; margin-top: 21px; }
    .contact-details a, .contact-details div { color: #3b4d42; font-size: 14px; }
    .contact-details strong { display: inline-block; min-width: 98px; color: var(--green-dark); }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; background: #fff; border: 1px solid var(--line); }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #45554b; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 43px; padding: 10px 11px; border: 1px solid #cbd8cf; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 108px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #9cc8a8; outline-offset: 1px; }
    .form .button { justify-self: start; }
    .join-strip { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 32px; padding: 22px 24px; border: 1px solid #c9ddcb; background: #edf5ed; }
    .join-strip h3 { margin: 0 0 4px; font-size: 18px; }
    .join-strip p { margin: 0; color: var(--muted); font-size: 13px; }
    .site-footer { padding: 28px 0 22px; background: #e7eee8; color: #26382d; }
    .footer-top { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding-bottom: 20px; border-bottom: 1px solid #cbd8ce; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; color: #40564a; font-size: 12px; }
    .footer-links a:hover { color: var(--green); text-decoration: underline; text-underline-offset: 3px; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 16px; padding-top: 16px; color: #526259; font-size: 12px; }
    .float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: flex; align-items: center; gap: 10px; padding: 11px 15px; border: 0; border-radius: 3px; background: var(--green-dark); color: #fff; font-weight: 700; box-shadow: 0 5px 20px rgba(24,50,37,.18); cursor: pointer; transition: transform .2s, background .2s; }
    .float-contact:hover { transform: translateY(-3px); background: var(--green); }
    .to-top { position: fixed; right: 24px; bottom: 75px; z-index: 14; display: none; width: 38px; height: 38px; border: 1px solid #b9cbbd; background: #fff; color: var(--green-dark); cursor: pointer; }
    .to-top.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { 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: 1000px) {
      .nav { gap: 12px; }
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 10px max(20px, calc((100% - var(--container)) / 2)); border-bottom: 1px solid var(--line); background: var(--paper); box-shadow: 0 12px 16px rgba(24,37,31,.07); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 11px 8px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-actions .button { min-height: 40px; padding: 8px 12px; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero { padding: 58px 0 43px; }
      .section { padding: 50px 0; }
      .section-heading { align-items: start; flex-direction: column; gap: 12px; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .intro-layout, .solution-grid, .contact-grid, .network-band { grid-template-columns: 1fr; gap: 24px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; }
      .workflow { grid-template-columns: repeat(2, 1fr); }
      .case-grid { grid-template-columns: 1fr 1fr; }
      .review-grid { grid-template-columns: repeat(2, 1fr); gap: 0 18px; }
      .article-links { grid-template-columns: repeat(2, 1fr); }
      .article-link:last-child { grid-column: 1 / -1; }
      .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      .container { width: calc(100% - 28px); }
      .brand { font-size: 15px; }
      .ai-page-logo { width: 32px; }
      .nav-actions .button { display: none; }
      .nav-links.open { grid-template-columns: repeat(2, 1fr); }
      h1 { font-size: 39px; }
      .hero-copy { font-size: 15px; }
      .capability-list, .service-grid, .workflow, .solution-list, .case-grid, .review-grid, .knowledge { grid-template-columns: 1fr; }
      .service-item { padding-right: 0; }
      .review-score { align-items: flex-start; gap: 14px; padding: 17px; }
      .score-number { font-size: 34px; }
      .form { grid-template-columns: 1fr; padding: 16px; }
      .field-full { grid-column: auto; }
      .join-strip { align-items: flex-start; flex-direction: column; }
      .article-links { grid-template-columns: 1fr; }
      .article-link:last-child { grid-column: auto; }
      .float-contact { right: 12px; bottom: 12px; }
      .to-top { right: 19px; bottom: 69px; }
    }