:root {
      color-scheme: light;
      --ink: #14243b;
      --muted: #566981;
      --blue: #125be4;
      --blue-deep: #083b9d;
      --cyan: #c9efff;
      --line: #dce6f2;
      --paper: #f4f8ff;
      --white: #fff;
      --green: #17674d;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", 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(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: relative; z-index: 5; background: #fff; border-bottom: 1px solid var(--line); }
    .header-row { min-height: 76px; 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; font-weight: 800; font-size: 18px; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .nav-wrap { display: flex; align-items: center; justify-content: flex-end; gap: 18px; min-width: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 7px 9px; color: #3c5069; font-size: 13px; text-decoration: none; white-space: nowrap; border-radius: 4px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--blue); background: #edf4ff; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 19px; border: 0; border-radius: 4px; background: var(--blue); color: #fff; text-decoration: none; font-weight: 700; transition: background .2s, transform .2s, box-shadow .2s; }
    .nav-cta:hover, .button:hover { background: var(--blue-deep); box-shadow: 0 8px 20px #125be42b; transform: translateY(-2px); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: white; border-radius: 4px; color: var(--ink); font-size: 21px; }
    .hero { position: relative; overflow: hidden; background: linear-gradient(118deg, #eaf4ff 0%, #f8fbff 52%, #dcf4ff 100%); }
    .hero::before { content: ""; position: absolute; width: 420px; height: 420px; right: -150px; top: -225px; border: 1px solid #75b9f24a; border-radius: 50%; box-shadow: 0 0 0 36px #9bcdf21b, 0 0 0 72px #9bcdf214; }
    .hero-inner { position: relative; padding-top: 78px; padding-bottom: 54px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--blue-deep); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: #22a5d7; }
    h1 { max-width: 760px; margin: 18px 0 17px; font-size: clamp(38px, 5vw, 62px); line-height: 1.14; letter-spacing: 0; }
    .hero-copy { max-width: 660px; margin: 0; color: #425873; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .button.secondary { color: var(--blue-deep); background: #fff; border: 1px solid #bfd4ef; }
    .hero-note { margin: 20px 0 0; color: #566981; font-size: 13px; }
    .hero-bottom { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 48px; border: 1px solid #c9ddf3; background: #c9ddf3; }
    .metric { min-height: 94px; padding: 18px 21px; background: #f8fbff; }
    .metric strong { display: block; color: var(--blue-deep); font-size: 17px; }
    .metric span { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section.white { background: #fff; }
    .section.tint { background: #edf5ff; }
    .section-heading { max-width: 700px; margin-bottom: 32px; }
    .section-heading h2 { margin: 8px 0 10px; font-size: clamp(27px, 4vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p { margin: 0; color: var(--muted); }
    .section-kicker { color: var(--blue); font-size: 12px; font-weight: 800; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: start; }
    .intro-copy { color: #40546c; }
    .intro-copy p { margin: 0 0 15px; }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; padding: 0; margin: 0; list-style: none; }
    .capability-list li { padding: 12px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .capability-list li::before { content: "＋"; margin-right: 9px; color: var(--blue); }
    .platform-band { margin-top: 28px; padding: 18px 20px; border-left: 3px solid #1b8dc8; background: #edf7ff; color: #435970; font-size: 14px; }
    .platform-band strong { color: var(--ink); }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
    .service-item { padding: 21px 20px; border: 1px solid var(--line); background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
    .service-item:hover, .quote:hover { transform: translateY(-3px); border-color: #9fc1ed; box-shadow: 0 12px 26px #18477c12; }
    .service-item h3, .quote h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-more { margin-top: 26px; color: var(--muted); font-size: 13px; }
    .service-more strong { color: var(--blue-deep); }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid #bdd3ee; }
    .step { position: relative; padding: 23px 20px 5px 0; }
    .step:not(:last-child)::after { content: ""; position: absolute; top: 33px; right: 12px; width: 18px; height: 1px; background: #7da7d8; }
    .step-number { color: var(--blue); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 8px 0 5px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solutions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); }
    .solution { padding: 20px 22px 20px 0; border-bottom: 1px solid var(--line); }
    .solution h3 { margin: 0 0 7px; font-size: 16px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network { display: flex; flex-wrap: wrap; gap: 9px; }
    .network span { padding: 7px 11px; border: 1px solid #cbdcf0; background: #fff; color: #29445f; font-size: 13px; }
    .comparison { display: grid; grid-template-columns: .75fr 1.25fr; gap: 28px; align-items: start; }
    .rating { padding: 24px; border-top: 4px solid var(--blue); background: #fff; }
    .rating strong { display: block; color: var(--blue-deep); font-size: 46px; line-height: 1.1; }
    .rating .stars { margin: 8px 0; color: #e59a18; font-size: 19px; }
    .rating p { margin: 0; color: var(--muted); }
    .table-scroll { overflow-x: auto; background: #fff; }
    table { width: 100%; min-width: 570px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); }
    th { color: #37516e; background: #f4f8ff; font-size: 13px; }
    td { font-size: 14px; }
    td:last-child { color: var(--green); font-weight: 700; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case { overflow: hidden; background: #fff; border: 1px solid var(--line); }
    .case img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
    .case-copy { padding: 17px 19px; }
    .case-copy h3 { margin: 0 0 5px; font-size: 17px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .square-case { display: grid; grid-template-columns: minmax(120px, 180px) 1fr; align-items: center; gap: 20px; margin-top: 18px; padding: 16px; border: 1px solid var(--line); background: #fff; }
    .square-case img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; }
    .square-case h3 { margin: 0 0 7px; font-size: 17px; }
    .square-case p { margin: 0; color: var(--muted); font-size: 14px; }
    .quote-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; }
    .quote { padding: 19px; border: 1px solid var(--line); background: #fff; transition: transform .2s, box-shadow .2s; }
    .quote p { margin: 0 0 15px; color: #42566d; font-size: 14px; }
    .quote h3 { margin-bottom: 0; font-size: 13px; color: var(--blue-deep); }
    .quote small { color: var(--muted); font-weight: 400; }
    .article-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; border-top: 1px solid var(--line); }
    .article-links a { padding: 13px 0; border-bottom: 1px solid var(--line); color: #294b72; text-decoration: none; }
    .article-links a:hover { color: var(--blue); }
    .price-note { padding: 23px 25px; border-left: 3px solid var(--blue); background: #fff; }
    .price-note h3 { margin: 0 0 7px; }
    .price-note p { margin: 0; color: var(--muted); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 12px; color: var(--blue); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: 0; padding: 0 0 17px; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-links { display: grid; gap: 8px; margin-top: 18px; }
    .contact-links a { color: var(--blue-deep); text-decoration: none; }
    .form-grid { 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%; min-height: 44px; padding: 10px 12px; border: 1px solid #cbd8e7; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 116px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid #75aaf5; outline-offset: 1px; }
    .form-actions { display: flex; align-items: center; gap: 14px; margin-top: 16px; }
    .form-status { color: var(--green); font-size: 13px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 25px 28px; background: #e3f2ff; border-left: 4px solid var(--blue); }
    .join-band h2 { margin: 0 0 4px; font-size: 23px; }
    .join-band p { margin: 0; color: var(--muted); }
    .site-footer { padding: 34px 0 22px; background: #e8f0fa; color: #263a52; }
    .footer-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; }
    .footer-top p { max-width: 530px; margin: 9px 0 0; color: #4d6178; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .footer-links a { color: #284b73; font-size: 13px; text-decoration: none; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 18px; margin-top: 23px; padding-top: 14px; border-top: 1px solid #cbd7e5; color: #53667c; font-size: 12px; }
    .float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 6; }
    .float-contact a { display: inline-flex; align-items: center; gap: 8px; padding: 12px 15px; border-radius: 4px; background: var(--blue); color: white; font-size: 13px; font-weight: 700; text-decoration: none; box-shadow: 0 7px 20px #123d7d33; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { 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: 900px) {
      .header-row { min-height: 68px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-wrap { gap: 9px; }
      .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 12px 20px 18px; justify-content: flex-start; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px #14243b0c; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .nav-cta { min-height: 40px; padding-inline: 12px; font-size: 13px; }
      .service-grid, .quote-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .comparison, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
    }
    @media (max-width: 620px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero-inner { padding-top: 57px; padding-bottom: 35px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .hero-bottom { grid-template-columns: repeat(2, 1fr); margin-top: 34px; }
      .metric { min-height: 80px; padding: 14px; }
      .section { padding: 55px 0; }
      .intro-grid, .solutions, .case-grid { grid-template-columns: 1fr; gap: 12px; }
      .capability-list { grid-template-columns: 1fr; }
      .service-grid, .quote-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); }
      .step { padding-right: 12px; }
      .step::after { display: none; }
      .square-case { grid-template-columns: 104px 1fr; gap: 14px; padding: 12px; }
      .article-links { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .join-band, .footer-top, .footer-bottom { flex-direction: column; align-items: flex-start; }
      .float-contact { right: 12px; bottom: 12px; }
    }