:root {
      color-scheme: light;
      --ink: #182432;
      --muted: #566577;
      --line: #dce4ed;
      --paper: #f6f8fc;
      --white: #fff;
      --blue: #245be8;
      --cyan: #06a9b8;
      --lime: #c8f36b;
      --pink: #ee5c91;
      --shadow: 0 16px 40px rgba(27, 49, 82, .09);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    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; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { display: block; max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .topbar {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line);
      backdrop-filter: blur(14px);
    }
    .nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .ai-page-logo { width: 38px; height: 38px; object-fit: contain; }
    .brand strong { font-size: 17px; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #405064; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-cta, .button {
      display: inline-flex; justify-content: center; align-items: center; gap: 8px;
      border: 1px solid transparent; border-radius: 5px; padding: 11px 17px;
      background: var(--blue); color: white; font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s;
    }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(36,91,232,.23); }
    .button.secondary { background: white; color: var(--ink); border-color: var(--line); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); border-radius: 5px; padding: 8px 12px; }
    .hero { overflow: hidden; position: relative; padding: 76px 0 52px; background: #eef4ff; border-bottom: 1px solid #dbe6f7; }
    .hero::before {
      content: ""; position: absolute; inset: 0;
      background-image: linear-gradient(rgba(36,91,232,.055) 1px, transparent 1px), linear-gradient(90deg, rgba(36,91,232,.055) 1px, transparent 1px);
      background-size: 42px 42px; mask-image: linear-gradient(to bottom, black, transparent 92%); pointer-events: none;
    }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.1fr) minmax(290px,.9fr); gap: 48px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: #245be8; font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--pink); box-shadow: 0 0 0 5px rgba(238,92,145,.13); }
    h1 { max-width: 680px; margin: 17px 0 18px; font-size: clamp(40px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero p { max-width: 650px; margin: 0; color: #435368; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 18px !important; font-size: 13px !important; color: #617188 !important; }
    .signal-board { position: relative; padding: 22px; border: 1px solid rgba(36,91,232,.18); background: rgba(255,255,255,.85); box-shadow: var(--shadow); }
    .signal-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
    .signal-top strong { font-size: 14px; }
    .signal-state { color: #087f79; font-size: 12px; font-weight: 700; }
    .signal-state::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #22b596; margin-right: 7px; }
    .signal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding-top: 15px; }
    .signal-item { padding: 14px; background: #f3f7ff; border-left: 3px solid var(--blue); }
    .signal-item:nth-child(2) { border-color: var(--cyan); }
    .signal-item:nth-child(3) { border-color: var(--pink); }
    .signal-item:nth-child(4) { border-color: #91bc2e; }
    .signal-item b { display: block; font-size: 19px; }
    .signal-item span { color: var(--muted); font-size: 12px; }
    .ticker { position: relative; padding: 18px 0; background: #182432; color: #fff; }
    .ticker-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
    .ticker strong { color: var(--lime); }
    .model-list { display: flex; gap: 9px; flex-wrap: wrap; }
    .model-list span { padding: 4px 9px; border: 1px solid rgba(255,255,255,.22); color: #e7edf5; font-size: 12px; }
    section.content-section { padding: 66px 0; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
    .section-heading h2 { margin: 0; font-size: 30px; line-height: 1.25; letter-spacing: 0; }
    .section-heading p { max-width: 560px; margin: 0; color: var(--muted); }
    .kicker { color: var(--cyan); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    .intro-band { display: grid; grid-template-columns: .82fr 1.18fr; gap: 44px; align-items: start; padding: 36px 0; border-bottom: 1px solid var(--line); }
    .intro-band h2 { margin: 8px 0; font-size: 28px; line-height: 1.3; }
    .intro-copy p { margin: 0 0 12px; color: var(--muted); }
    .metric-strip { display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--line); background: white; }
    .metric { padding: 20px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric b { display: block; color: var(--blue); font-size: 22px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service { min-height: 176px; padding: 20px; background: white; border: 1px solid var(--line); transition: transform .22s, box-shadow .22s, border-color .22s; }
    .service:hover, .quote:hover, .case:hover { transform: translateY(-4px); border-color: #b8cafa; box-shadow: var(--shadow); }
    .service .num { color: var(--cyan); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 9px 0 7px; font-size: 17px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflows { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .step { position: relative; padding: 24px 22px 25px 0; }
    .step:not(:last-child)::after { content: ""; position: absolute; top: 38px; right: 16px; width: 20px; height: 1px; background: var(--cyan); }
    .step b { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: #d9f5f3; color: #087d7b; }
    .step h3 { margin: 12px 0 5px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-row { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
    .industry-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
    .industry-list span { padding: 12px 0; border-bottom: 1px solid var(--line); color: #3f5064; }
    .industry-list span::before { content: "↗"; color: var(--cyan); margin-right: 9px; }
    .network { padding: 24px; background: #eaf3ff; border-left: 4px solid var(--blue); }
    .network h3 { margin: 0 0 8px; }
    .network p { margin: 0; color: var(--muted); }
    .asset-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 16px; align-items: start; }
    .asset-main { display: grid; gap: 16px; }
    .image-frame { overflow: hidden; background: #e9eef6; border: 1px solid var(--line); }
    .image-frame img { width: 100%; height: auto; }
    .asset-small { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .asset-caption { padding: 12px 14px; background: white; color: #445469; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #edf3ff; color: #22344d; font-size: 13px; }
    td { color: #46566a; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .score-panel { display: flex; align-items: center; gap: 24px; margin-bottom: 18px; padding: 20px 24px; background: #182432; color: white; }
    .score-number { color: var(--lime); font-size: 38px; font-weight: 800; line-height: 1; }
    .stars { color: #f5ce4d; letter-spacing: 0; }
    .score-panel p { margin: 4px 0 0; color: #d1dce8; font-size: 13px; }
    .price-line { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 21px 0; border-bottom: 1px solid var(--line); }
    .price-line h3 { margin: 0 0 4px; font-size: 17px; }
    .price-line p { margin: 0; color: var(--muted); font-size: 14px; }
    .price-line a { flex: 0 0 auto; color: var(--blue); font-weight: 700; }
    .quote-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .quote { padding: 20px; border: 1px solid var(--line); background: white; transition: .22s; }
    .quote p { margin: 0 0 16px; color: #405166; font-size: 14px; }
    .quote strong { display: block; font-size: 14px; }
    .quote span { color: var(--muted); font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .case { border: 1px solid var(--line); background: white; transition: .22s; }
    .case .image-frame { border: 0; border-bottom: 1px solid var(--line); }
    .case-copy { padding: 16px; }
    .case-copy h3 { margin: 0 0 6px; font-size: 16px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.66); }
    summary { position: relative; padding: 17px 42px 17px 4px; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 8px; top: 13px; color: var(--blue); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 36px 17px 4px; color: var(--muted); font-size: 14px; }
    .article-links { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 24px; border-top: 1px solid var(--line); }
    .article-links a { display: flex; justify-content: space-between; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); color: #34465d; }
    .article-links a span:last-child { color: var(--blue); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .tag-cloud span { padding: 7px 12px; border: 1px solid #c8d8ed; background: #fff; color: #38506a; font-size: 13px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-info { padding: 22px 0; border-top: 3px solid var(--cyan); }
    .contact-info h3 { margin: 0 0 8px; font-size: 21px; }
    .contact-info p { color: var(--muted); }
    .contact-links { display: grid; gap: 9px; margin-top: 18px; color: #34485e; font-size: 14px; }
    .contact-links a { color: var(--blue); }
    .qr { width: 132px; margin-top: 18px; border: 1px solid var(--line); background: white; padding: 6px; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 23px; background: white; border: 1px solid var(--line); }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { color: #405166; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 11px 12px; border: 1px solid #cbd5e1; border-radius: 3px; background: #fff; color: var(--ink); }
    input:focus, select:focus, textarea:focus { outline: 2px solid rgba(36,91,232,.2); border-color: var(--blue); }
    textarea { min-height: 110px; resize: vertical; }
    form button { cursor: pointer; }
    .footer { padding: 27px 0; background: #e8edf5; color: #34445a; border-top: 1px solid #d3dce8; }
    .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
    .footer p { margin: 0; font-size: 13px; }
    .friend-links { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; }
    .friend-links a { color: #34445a; }
    .friend-links a:hover { color: var(--blue); }
    .float-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; }
    .float-contact a { display: inline-flex; align-items: center; gap: 8px; padding: 12px 15px; background: var(--cyan); color: white; font-weight: 700; border-radius: 4px; box-shadow: 0 8px 24px rgba(6,169,184,.28); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s 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: 940px) {
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 12px 20px 18px; background: white; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3,1fr); }
      .nav-links a { padding: 10px 8px; }
      .menu-toggle { display: inline-flex; }
      .nav-cta { display: none; }
      .hero-inner, .intro-band, .industry-row, .contact-grid { grid-template-columns: 1fr; }
      .hero-inner { gap: 30px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .quote-grid { grid-template-columns: repeat(2,1fr); }
      .section-heading { display: block; }
      .section-heading p { margin-top: 10px; }
    }
    @media (max-width: 620px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .hero { padding: 52px 0 38px; }
      h1 { font-size: 40px; }
      .hero p { font-size: 16px; }
      section.content-section { padding: 48px 0; }
      .section-heading h2 { font-size: 25px; }
      .metric-strip { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .service-grid, .quote-grid, .case-grid, .asset-grid, .workflows { grid-template-columns: 1fr; }
      .asset-small { grid-template-columns: 1fr 1fr; }
      .step { padding: 17px 0; border-bottom: 1px solid var(--line); }
      .step::after { display: none; }
      .industry-list { grid-template-columns: 1fr; }
      .article-links { grid-template-columns: 1fr; }
      .score-panel { align-items: flex-start; gap: 16px; }
      form { grid-template-columns: 1fr; padding: 17px; }
      .field.full { grid-column: auto; }
      .price-line { align-items: flex-start; flex-direction: column; gap: 10px; }
      .float-contact { right: 12px; bottom: 12px; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
      .nav-links.open { grid-template-columns: repeat(2,1fr); }
    }