:root {
      color-scheme: light;
      --ink: #172431;
      --muted: #586a79;
      --line: #dce4eb;
      --paper: #f7f9fc;
      --white: #fff;
      --teal: #087f83;
      --teal-dark: #075e64;
      --coral: #db6550;
      --lime: #d7eb83;
      --blue: #446fa8;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        linear-gradient(135deg, rgba(8,127,131,.035), transparent 36rem),
        var(--paper);
      font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, 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(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; flex: 0 0 auto; }
    .ai-page-logo { max-width: 100%; height: auto; width: 42px; max-height: 42px; object-fit: contain; }
    .brand-name { font-weight: 800; font-size: 17px; line-height: 1.2; }
    .brand-sub { display: block; color: var(--muted); font-size: 10px; letter-spacing: 1px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { text-decoration: none; color: #334653; font-size: 13px; padding: 8px 9px; }
    .nav-links a:hover { color: var(--teal); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 1px solid var(--teal); border-radius: 5px; padding: 11px 17px;
      color: #fff; background: var(--teal); text-decoration: none; font-weight: 700;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta:hover, .button:hover { background: var(--teal-dark); box-shadow: 0 7px 20px rgba(8,127,131,.18); transform: translateY(-2px); }
    .button.secondary { color: var(--ink); background: #fff; border-color: #bac9d3; }
    .button.secondary:hover { color: var(--teal-dark); border-color: var(--teal); background: #f6ffff; }
    .menu-toggle { display: none; align-items: center; justify-content: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); cursor: pointer; }
    .hero { overflow: hidden; position: relative; padding: 78px 0 34px; background: linear-gradient(118deg, #eaf5f3 0%, #f5f5fa 52%, #fff3eb 100%); border-bottom: 1px solid #e4e8ec; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(8,127,131,.14); transform: rotate(35deg); }
    .hero::before { width: 330px; height: 190px; right: -100px; top: 50px; border-radius: 48% 20% 45% 20%; }
    .hero::after { width: 250px; height: 140px; right: 70px; bottom: -93px; border-radius: 50%; border-color: rgba(219,101,80,.18); }
    .hero-inner { position: relative; z-index: 1; max-width: 780px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--teal-dark); font-size: 12px; font-weight: 800; letter-spacing: 1.2px; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
    h1 { margin: 17px 0 16px; max-width: 760px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero p { max-width: 650px; margin: 0; color: #405460; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-notes { display: flex; flex-wrap: wrap; gap: 18px; padding: 0; margin: 25px 0 0; list-style: none; color: #405460; font-size: 13px; }
    .hero-notes li::before { content: "✓"; color: var(--teal); font-weight: 900; margin-right: 7px; }
    .metric-strip { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 54px; background: #fff; border: 1px solid #dfe6eb; border-radius: 7px; box-shadow: 0 12px 32px rgba(28,53,68,.06); }
    .metric { padding: 20px 24px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-size: 19px; }
    .metric span { color: var(--muted); font-size: 12px; }
    section.content-section { padding: 68px 0; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 29px; }
    .section-heading h2 { margin: 7px 0 0; font-size: clamp(25px, 3vw, 36px); line-height: 1.25; letter-spacing: 0; }
    .section-heading p { max-width: 490px; margin: 0; color: var(--muted); font-size: 14px; }
    .kicker { color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: 1.3px; }
    .intro-band { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: start; padding: 30px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .intro-band h3 { margin: 0 0 12px; font-size: 23px; }
    .intro-band p { margin: 0; color: var(--muted); }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px 20px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .capability-list b { color: var(--teal-dark); }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 0 24px; border-top: 1px solid var(--line); }
    .service-item { padding: 22px 0 20px; border-bottom: 1px solid var(--line); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tag { display: inline-block; margin-top: 10px; color: var(--teal-dark); font-size: 11px; font-weight: 700; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); border-block: 1px solid var(--line); }
    .step { padding: 23px 20px 23px 0; }
    .step + .step { padding-left: 20px; border-left: 1px solid var(--line); }
    .step-num { color: var(--coral); font-size: 12px; font-weight: 900; letter-spacing: 1px; }
    .step h3 { margin: 8px 0 5px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 0 24px; }
    .solution { padding: 20px 0; border-top: 1px solid var(--line); }
    .solution h3 { margin: 0 0 6px; font-size: 16px; }
    .solution p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-network { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 21px; }
    .service-network span { border: 1px solid #d4e1e2; background: #fff; padding: 8px 12px; border-radius: 3px; font-size: 12px; color: #304a51; }
    .timeline { border-left: 2px solid #b5d8d4; margin: 12px 0 0 7px; padding-left: 25px; display: grid; gap: 21px; }
    .timeline article { position: relative; }
    .timeline article::before { content: ""; position: absolute; left: -32px; top: 8px; width: 10px; height: 10px; border-radius: 50%; background: var(--teal); border: 3px solid var(--paper); box-shadow: 0 0 0 1px #83bebb; }
    .timeline h3 { margin: 0 0 4px; font-size: 16px; }
    .timeline p { margin: 0; color: var(--muted); font-size: 13px; }
    .showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
    .showcase figure { margin: 0; }
    .image-frame { background: #e9eef0; border-radius: 5px; overflow: hidden; }
    .ai-page-image { display: block; width: 100%; max-width: 100%; height: auto; }
    .showcase figcaption { padding-top: 11px; font-weight: 700; font-size: 14px; }
    .image-quad { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 13px; margin-top: 24px; }
    .image-quad figure { margin: 0; }
    .image-quad .image-frame { aspect-ratio: 4 / 3; display: grid; place-items: center; }
    .image-quad img { width: 100%; height: 100%; object-fit: cover; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 700px; text-align: left; }
    th, td { padding: 13px 16px; border-bottom: 1px solid #e7edf0; font-size: 13px; }
    th { background: #eef5f4; color: #24474b; font-weight: 800; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { font-weight: 700; }
    .rating-line { display: flex; align-items: center; flex-wrap: wrap; gap: 13px; margin-bottom: 18px; }
    .rating-score { font-size: 28px; font-weight: 900; color: var(--teal-dark); }
    .stars { color: #bd8123; letter-spacing: 2px; font-size: 19px; }
    .rating-note { color: var(--muted); font-size: 12px; }
    .price-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 25px; border-block: 1px solid var(--line); padding: 23px 0; }
    .price-band h3 { margin: 0 0 5px; font-size: 18px; }
    .price-band p { margin: 0; color: var(--muted); font-size: 13px; }
    .price-mark { padding: 9px 12px; color: #714a20; background: #fff4dc; border: 1px solid #ead8b1; border-radius: 3px; font-size: 12px; font-weight: 800; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .tag-cloud span { color: #395565; background: #eaf0f4; padding: 7px 11px; border-radius: 3px; font-size: 12px; }
    .reviews { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
    .review { padding: 18px 0 17px; border-top: 2px solid #b6d6d2; border-bottom: 1px solid var(--line); }
    .review blockquote { margin: 0 0 14px; color: #354a56; font-size: 14px; }
    .review cite { color: var(--muted); font-style: normal; font-size: 12px; font-weight: 700; }
    .article-list { border-top: 1px solid var(--line); }
    .article-list a { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; text-decoration: none; border-bottom: 1px solid var(--line); }
    .article-list a:hover { color: var(--teal-dark); }
    .article-list span:last-child { color: var(--muted); font-size: 12px; white-space: nowrap; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { cursor: pointer; list-style: none; padding: 16px 34px 16px 0; position: relative; font-weight: 700; font-size: 14px; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 13px; color: var(--teal); font-size: 21px; font-weight: 400; transition: transform .2s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { margin: -3px 34px 17px 0; color: var(--muted); font-size: 13px; }
    .contact-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 50px; align-items: start; }
    .contact-copy h3 { margin: 0 0 10px; font-size: 22px; }
    .contact-copy p { color: var(--muted); font-size: 14px; }
    .contact-details { display: grid; gap: 8px; margin-top: 20px; font-size: 13px; }
    .contact-details a { text-decoration-color: #a2c8c5; text-underline-offset: 3px; }
    .qr { margin-top: 18px; width: 130px; padding: 7px; border: 1px solid var(--line); background: #fff; }
    .qr img { display: block; max-width: 100%; height: auto; }
    .request-form { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #cad5dc; border-radius: 4px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(8,127,131,.11); }
    .field textarea { min-height: 120px; resize: vertical; }
    .form-note { grid-column: 1/-1; margin: -7px 0 0; color: var(--muted); font-size: 11px; }
    .footer { padding: 27px 0 23px; color: #263d4a; background: #edf2f3; border-top: 1px solid #d9e1e5; }
    .footer-main { display: flex; justify-content: space-between; gap: 30px; align-items: start; }
    .footer p { margin: 5px 0; color: #52636d; font-size: 12px; }
    .friend-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 15px; max-width: 610px; }
    .friend-links a { color: #315964; font-size: 12px; text-decoration: none; }
    .friend-links a:hover { text-decoration: underline; }
    .copyright { margin-top: 18px; padding-top: 13px; border-top: 1px solid #d7e0e4; color: #586a73; font-size: 11px; }
    .floating-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating-contact a { display: grid; place-items: center; min-width: 46px; min-height: 46px; padding: 7px 10px; border-radius: 4px; color: #fff; background: var(--teal-dark); text-decoration: none; font-size: 11px; box-shadow: 0 5px 17px rgba(15,53,61,.2); }
    .floating-contact a:last-child { color: var(--ink); background: var(--lime); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
    .reveal.visible { 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: 900px) {
      .nav-links { display: none; position: absolute; top: 71px; left: 0; right: 0; padding: 12px 20px 18px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px rgba(23,36,49,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: inline-flex; }
      .nav-row { gap: 12px; }
      .nav-actions { display: flex; align-items: center; gap: 9px; }
      .nav-cta { padding: 9px 12px; font-size: 12px; }
      .service-grid, .solution-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .reviews { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .image-quad { grid-template-columns: repeat(2, minmax(0,1fr)); }
    }
    @media (max-width: 620px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .hero { padding: 58px 0 24px; }
      .hero p { font-size: 15px; }
      .metric-strip { grid-template-columns: repeat(2,1fr); margin-top: 35px; }
      .metric { padding: 15px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      section.content-section { padding: 48px 0; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 11px; }
      .intro-band, .contact-layout { grid-template-columns: 1fr; gap: 24px; }
      .capability-list { grid-template-columns: 1fr; }
      .service-grid, .solution-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step { padding: 17px 12px 17px 0; }
      .step + .step { padding-left: 12px; }
      .step:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
      .step:nth-child(4) { border-top: 1px solid var(--line); }
      .showcase { grid-template-columns: 1fr; gap: 20px; }
      .reviews { grid-template-columns: 1fr; gap: 13px; }
      .price-band { grid-template-columns: 1fr; gap: 13px; }
      .request-form { grid-template-columns: 1fr; }
      .field.full, .form-note { grid-column: auto; }
      .footer-main { display: grid; }
      .friend-links { justify-content: flex-start; }
      .nav-links.open { grid-template-columns: repeat(2, 1fr); }
      .floating-contact { right: 9px; bottom: 12px; }
      .floating-contact a { min-width: 42px; min-height: 42px; }
    }