:root {
      color-scheme: light;
      --ink: #183433;
      --muted: #5f7471;
      --teal: #087f75;
      --teal-dark: #075e58;
      --mint: #dff4ed;
      --paper: #f4faf8;
      --line: #d8e9e3;
      --coral: #c95740;
      --gold: #e4b64c;
      --white: #fff;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    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 {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(247, 251, 249, .96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .nav-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; flex: 0 0 auto; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .brand-name { font-size: 17px; font-weight: 800; line-height: 1.2; }
    .brand-note { display: block; color: var(--muted); font-size: 11px; font-weight: 500; margin-top: 3px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 10px 11px; text-decoration: none; color: #38534f; font-size: 13px; }
    .nav-links a:hover { color: var(--teal); }
    .nav-links .nav-cta { margin-left: 8px; padding: 10px 16px; border-radius: 5px; color: white; background: var(--teal); font-weight: 700; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: white; color: var(--ink); border-radius: 5px; }
    .menu-toggle span, .menu-toggle::before, .menu-toggle::after { content: ""; display: block; width: 17px; height: 2px; background: currentColor; margin: 4px auto; }
    .hero { overflow: hidden; position: relative; padding: 74px 0 62px; background: #e8f6f1; border-bottom: 1px solid #cfe6dd; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(8,127,117,.16); transform: rotate(35deg); }
    .hero::before { width: 380px; height: 170px; right: 4%; top: 25px; border-radius: 48%; }
    .hero::after { width: 300px; height: 120px; right: 8%; top: 68px; border-radius: 48%; }
    .hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(270px, .8fr); gap: 58px; align-items: center; position: relative; z-index: 1; }
    .eyebrow { color: var(--teal-dark); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
    h1 { max-width: 720px; margin: 16px 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 0; color: #435f5a; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 8px; padding: 11px 19px; border: 1px solid var(--teal); border-radius: 5px; text-decoration: none; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(15, 85, 76, .15); }
    .button-primary { background: var(--teal); color: white; }
    .button-primary:hover { background: var(--teal-dark); }
    .button-secondary { color: var(--teal-dark); background: rgba(255,255,255,.72); }
    .hero-side { padding: 24px 0 24px 28px; border-left: 1px solid #bddbd1; }
    .hero-side h2 { margin: 0 0 14px; font-size: 17px; }
    .hero-side 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 9px; border: 1px solid #b9d8ce; border-radius: 3px; background: rgba(255,255,255,.6); color: #365b54; font-size: 12px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding: 25px 0; border-bottom: 1px solid var(--line); }
    .metric { padding: 0 22px; border-left: 1px solid var(--line); }
    .metric:first-child { padding-left: 0; border-left: 0; }
    .metric strong { display: block; font-size: 19px; }
    .metric span { color: var(--muted); font-size: 13px; }
    main { overflow: clip; }
    .section { padding: 74px 0; }
    .section-tint { background: #edf7f3; border-block: 1px solid #dcece6; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { margin: 0; font-size: 32px; line-height: 1.25; }
    .section-heading p { max-width: 580px; margin: 0; color: var(--muted); }
    .kicker { display: block; color: var(--teal); font-size: 12px; font-weight: 800; margin-bottom: 9px; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
    .intro-grid h2 { margin: 0 0 16px; font-size: 32px; }
    .intro-grid p { color: var(--muted); margin: 0 0 14px; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 25px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 13px 0; border-bottom: 1px solid var(--line); font-weight: 650; }
    .capability-list li::before { content: "＋"; margin-right: 9px; color: var(--teal); }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .service-item { min-height: 174px; padding: 20px; border: 1px solid var(--line); border-top: 3px solid #55a99a; background: rgba(255,255,255,.78); transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(24,52,51,.08); }
    .service-item h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
    .workflow article { padding-top: 17px; border-top: 2px solid #9ecfc1; counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; margin-bottom: 10px; color: var(--teal); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 0 0 6px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .solution-copy h2 { margin: 0 0 14px; font-size: 30px; }
    .solution-copy p { margin: 0 0 18px; color: var(--muted); }
    .solution-links { display: flex; flex-wrap: wrap; gap: 8px; }
    .solution-links a { padding: 7px 10px; border: 1px solid #c7ded6; background: white; color: #31534d; text-decoration: none; font-size: 13px; }
    .price-note { padding: 22px; border-left: 4px solid var(--coral); background: #fff6f1; }
    .price-note h3 { margin: 0 0 8px; font-size: 18px; }
    .price-note p { margin: 0; color: #665b55; font-size: 14px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    .comparison { width: 100%; border-collapse: collapse; min-width: 710px; text-align: left; }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid #e5efeb; }
    .comparison thead th { background: #e6f4ef; font-size: 14px; }
    .comparison tbody th { width: 25%; font-weight: 700; }
    .comparison td { color: #526a65; font-size: 14px; }
    .rating { display: flex; align-items: center; gap: 22px; margin: 0 0 22px; }
    .rating strong { color: var(--teal-dark); font-size: 32px; }
    .rating span { color: #9b6b11; letter-spacing: 0; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { background: white; border: 1px solid var(--line); }
    .case-media { overflow: hidden; aspect-ratio: 16 / 10; background: #e4f1ec; }
    .case-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .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; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; border-left: 2px solid #82bcae; background: #fff; }
    .review p { margin: 0 0 12px; color: #425c57; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: var(--muted); font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-list a { min-height: 116px; display: flex; flex-direction: column; justify-content: space-between; padding: 16px; border: 1px solid var(--line); background: #fff; text-decoration: none; }
    .article-list a:hover { border-color: var(--teal); }
    .article-list strong { font-size: 14px; }
    .article-list span { color: var(--teal); font-size: 12px; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 46px; align-items: start; }
    .contact-copy h2 { margin: 0 0 12px; font-size: 30px; }
    .contact-copy > p { color: var(--muted); }
    .contact-details { margin-top: 22px; }
    .contact-details p { margin: 9px 0; font-size: 14px; }
    .contact-details a { color: var(--teal-dark); }
    .qr { width: 132px; margin-top: 16px; }
    .qr img { display: block; width: 100%; height: auto; border: 1px solid var(--line); }
    .qr figcaption { margin-top: 6px; color: var(--muted); font-size: 12px; text-align: center; }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 24px; border: 1px solid var(--line); background: white; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { 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 #cbded7; border-radius: 3px; background: #fbfdfc; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form button { justify-self: start; border: 0; cursor: pointer; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 16px 28px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 2px; color: var(--teal); font-size: 20px; top: 10px; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: 0; padding: 0 10px 16px 0; color: var(--muted); font-size: 14px; }
    .network-row { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-row span { padding: 7px 10px; border-bottom: 2px solid #82bcae; background: white; font-size: 13px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px 0; border-top: 1px solid var(--line); }
    .join-band h2 { margin: 0 0 4px; font-size: 22px; }
    .join-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .footer { padding: 26px 0; border-top: 1px solid var(--line); background: #eaf4f0; color: #294541; }
    .footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 14px; }
    .footer-links a { color: #315d55; font-size: 12px; }
    .copyright { color: #5f7471; font-size: 12px; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .floating a { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid #b6d5ca; border-radius: 50%; background: white; color: var(--teal-dark); text-decoration: none; font-size: 12px; box-shadow: 0 4px 14px rgba(24,52,51,.12); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 940px) {
      .nav-inner { gap: 12px; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-inner { min-height: 66px; }
      .menu-toggle { display: block; flex: 0 0 auto; }
      .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; padding: 10px 16px 16px; border-bottom: 1px solid var(--line); background: #f7fbf9; align-items: stretch; }
      .nav-links.is-open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 10px; }
      .nav-links .nav-cta { margin: 4px 0 0; text-align: center; }
      .hero { padding: 54px 0 42px; }
      .hero::before { right: -210px; top: 140px; }
      .hero::after { right: -180px; top: 174px; }
      .hero-grid, .intro-grid, .solution-grid, .contact-grid { grid-template-columns: 1fr; gap: 30px; }
      .hero-side { padding: 19px 0 0; border-left: 0; border-top: 1px solid #bddbd1; }
      .hero-copy { font-size: 15px; }
      .metrics { grid-template-columns: 1fr 1fr; gap: 17px 0; }
      .metric:nth-child(3) { padding-left: 0; border-left: 0; }
      .section { padding: 54px 0; }
      .section-heading { display: block; }
      .section-heading h2 { margin-bottom: 10px; font-size: 27px; }
      .intro-grid h2, .solution-copy h2, .contact-copy h2 { font-size: 27px; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 23px 18px; }
      .case-grid, .reviews { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .join-band { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 440px) {
      .brand-note { display: none; }
      h1 { font-size: 39px; }
      .service-grid, .case-grid, .reviews, .workflow { grid-template-columns: 1fr; }
      .service-item { min-height: auto; }
      .form { grid-template-columns: 1fr; padding: 18px; }
      .field-wide { grid-column: auto; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
      .floating { right: 10px; bottom: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }