:root {
      color-scheme: light;
      --ink: #10233f;
      --muted: #5c6d83;
      --blue: #174fe5;
      --blue-deep: #1038ab;
      --cyan: #28b8d8;
      --line: #dce5f2;
      --paper: #ffffff;
      --wash: #f4f7fd;
      --lime: #c8ef71;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--wash);
      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 { max-width: 100%; height: auto; }
    .container { width: min(var(--container), 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 rgba(16,35,63,.08);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .ai-page-logo { width: 38px; max-height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 10px 11px; color: #344862; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .menu-toggle { display: none; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 19px; border: 1px solid transparent; border-radius: 6px;
      background: var(--blue); color: white; font-weight: 700; font-size: 14px;
      box-shadow: 0 8px 20px rgba(23,79,229,.18); transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .button:hover { transform: translateY(-2px); background: var(--blue-deep); box-shadow: 0 12px 26px rgba(23,79,229,.24); }
    .button-outline { background: white; color: var(--ink); border-color: var(--line); box-shadow: none; }
    .button-outline:hover { color: var(--blue); background: #f6f9ff; box-shadow: none; }
    .hero {
      position: relative; overflow: hidden; padding: 78px 0 54px;
      background: linear-gradient(125deg,#f7faff 0%,#eaf2ff 48%,#f3fcff 100%);
      border-bottom: 1px solid #e1eaf8;
    }
    .hero::before {
      content: ""; position: absolute; inset: 0;
      background-image: linear-gradient(rgba(23,79,229,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(23,79,229,.045) 1px,transparent 1px);
      background-size: 36px 36px; mask-image: linear-gradient(to bottom,black,transparent 95%); pointer-events: none;
    }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(280px,.8fr); align-items: center; gap: 56px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--cyan); }
    h1 { max-width: 700px; margin: 0; font-size: clamp(38px,5vw,66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 630px; margin: 22px 0 26px; color: #526780; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: #50627a; font-size: 13px; }
    .hero-note span::before { content: "✓"; margin-right: 7px; color: #158c83; font-weight: 800; }
    .hero-console { padding: 23px; border: 1px solid #d5e1f3; background: rgba(255,255,255,.82); box-shadow: 18px 20px 0 rgba(23,79,229,.08); }
    .console-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .console-status { display: inline-flex; align-items: center; gap: 7px; color: #12796f; font-weight: 700; }
    .console-status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #28b89a; box-shadow: 0 0 0 4px #dff7ef; }
    .console-title { margin: 18px 0 13px; font-size: 18px; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-chip { padding: 6px 10px; border: 1px solid #dbe5f2; border-radius: 4px; background: #f8faff; color: #344963; font-size: 12px; }
    .console-flow { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-top: 20px; }
    .flow-node { padding: 12px 8px; background: #edf3ff; color: #24436d; text-align: center; font-size: 11px; font-weight: 700; }
    .flow-node:not(:last-child)::after { content: "→"; float: right; margin-right: -14px; color: var(--blue); }
    .hero-stats { position: relative; display: grid; grid-template-columns: repeat(4,1fr); margin-top: 52px; border-top: 1px solid #d6e2f3; }
    .stat { padding: 22px 16px 0 0; }
    .stat strong { display: block; font-size: 22px; line-height: 1.3; }
    .stat span { color: var(--muted); font-size: 12px; }
    main section { padding: 76px 0; }
    .section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { margin: 0; font-size: clamp(27px,3vw,38px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p { max-width: 540px; margin: 0; color: var(--muted); font-size: 14px; }
    .section-kicker { margin: 0 0 9px; color: var(--blue); font-size: 11px; font-weight: 800; }
    .intro-band { background: var(--paper); }
    .intro-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
    .intro-copy p { color: var(--muted); margin: 18px 0 0; }
    .intro-points { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 26px; border-top: 1px solid var(--line); }
    .intro-point { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .intro-point strong { display: block; margin-bottom: 4px; font-size: 14px; }
    .intro-point span { color: var(--muted); font-size: 12px; }
    .service-section { background: #f2f6fd; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service-item { min-height: 166px; padding: 21px; border: 1px solid #dce5f2; background: #fff; transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #9bb7f3; box-shadow: 0 12px 24px rgba(24,59,116,.08); }
    .service-index { color: var(--blue); font: 700 11px/1.2 monospace; }
    .service-item h3 { margin: 12px 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 25px; padding-top: 18px; border-top: 1px solid var(--line); }
    .service-footer p { margin: 0; color: var(--muted); font-size: 13px; }
    .media-section { background: #fff; }
    .media-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: start; }
    .media-wide img, .media-square img { display: block; width: 100%; object-fit: contain; background: #eef3fb; }
    .media-wide img { aspect-ratio: 16/7; }
    .media-square img { aspect-ratio: 1/1; }
    .media-stack { display: grid; gap: 18px; }
    .media-caption { margin-top: 9px; color: var(--muted); font-size: 12px; }
    .workflow-section { background: #eaf1fd; }
    .steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 0 24px 0 0; }
    .step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 16px; color: var(--blue); font: 800 13px/1 monospace; }
    .step:not(:last-child)::after { content: ""; position: absolute; top: 5px; left: 38px; right: 18px; height: 1px; background: #b6c9ed; }
    .step h3 { margin: 0 0 7px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-section { background: #fff; }
    .industry-list { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .industry { padding: 20px; background: white; }
    .industry h3 { margin: 0 0 6px; font-size: 15px; }
    .industry p { margin: 0; color: var(--muted); font-size: 12px; }
    .network-section { background: #f4f7fd; }
    .network-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .network-copy { color: var(--muted); }
    .network-copy p { margin-top: 0; }
    .network-items { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-items span { padding: 8px 12px; border-left: 2px solid var(--cyan); background: white; color: #263e5c; font-size: 13px; }
    .review-section { background: #fff; }
    .review-score { display: flex; align-items: center; gap: 18px; padding: 17px 21px; background: #edf3ff; }
    .review-score strong { color: var(--blue); font-size: 34px; line-height: 1; }
    .stars { color: #d39200; letter-spacing: 0; }
    .review-score span { color: var(--muted); font-size: 12px; }
    .table-wrap { overflow-x: auto; margin-top: 22px; border: 1px solid var(--line); background: white; }
    table { width: 100%; border-collapse: collapse; min-width: 680px; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); font-size: 13px; vertical-align: top; }
    th { background: #f0f5ff; color: #27456f; font-size: 12px; }
    td:first-child { color: #344862; font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .good { color: #13786b; font-weight: 700; }
    .review-note { margin: 12px 0 0; color: var(--muted); font-size: 12px; }
    .case-section { background: #f2f6fd; }
    .case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .case-item { padding: 23px; border-top: 3px solid var(--blue); background: white; }
    .case-label { color: var(--blue); font-size: 11px; font-weight: 800; }
    .case-item h3 { margin: 10px 0 8px; font-size: 18px; }
    .case-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-result { display: inline-block; margin-top: 15px; padding-top: 11px; border-top: 1px solid var(--line); color: #28476e; font-size: 12px; font-weight: 700; }
    .testimonials-section { background: white; }
    .testimonial-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .quote { padding: 19px; border: 1px solid var(--line); }
    .quote p { margin: 0 0 16px; color: #40536c; font-size: 13px; }
    .quote footer { color: var(--ink); font-size: 12px; font-weight: 700; }
    .quote footer span { display: block; color: var(--muted); font-weight: 400; }
    .articles-section { background: #edf3fc; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; }
    .article-link { display: flex; min-height: 104px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid #d7e2f2; background: #fff; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { transform: translateY(-3px); border-color: #87a8ef; }
    .article-link strong { font-size: 13px; }
    .article-link span { color: var(--blue); font-size: 11px; }
    .faq-section { background: white; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 42px 17px 0; cursor: pointer; list-style: none; font-weight: 700; font-size: 14px; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 13px; color: var(--blue); font-size: 22px; font-weight: 400; transition: transform .2s ease; }
    details[open] summary::after { transform: rotate(45deg); }
    details p { max-width: 850px; margin: -3px 0 17px; color: var(--muted); font-size: 13px; }
    .contact-section { background: #eaf1fd; }
    .contact-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 46px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-lines { display: grid; gap: 9px; margin-top: 22px; color: #334b69; font-size: 13px; }
    .contact-lines a { color: var(--blue); }
    .contact-form { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; padding: 22px; border: 1px solid #d8e3f3; background: white; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1/-1; }
    .field label { color: #334862; font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #d5dfeb; border-radius: 3px; background: #fbfcff; color: var(--ink); outline: none; }
    .field textarea { min-height: 108px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(23,79,229,.1); }
    .contact-form .button { justify-self: start; }
    .partners-section { padding: 34px 0; background: #fff; border-top: 1px solid var(--line); }
    .partner-row { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .partner-row strong { flex: 0 0 auto; font-size: 13px; }
    .partner-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .partner-links a { color: #52647c; font-size: 12px; }
    .partner-links a:hover { color: var(--blue); }
    .site-footer { padding: 25px 0; background: #10233f; color: #e5edfa; }
    .footer-row { display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 12px; }
    .footer-row p { margin: 0; color: #becbe0; }
    .footer-row a { color: #e5edfa; }
    .float-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .float-contact a { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid #dbe5f2; border-radius: 50%; background: white; color: var(--blue); box-shadow: 0 6px 18px rgba(16,35,63,.12); font-size: 11px; font-weight: 800; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-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: 980px) {
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 12px 20px 18px; border-bottom: 1px solid var(--line); background: white; flex-wrap: wrap; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 12px; }
      .menu-toggle { display: inline-flex; min-height: 40px; padding: 0 12px; border: 1px solid var(--line); border-radius: 5px; background: white; color: var(--ink); }
      .nav-actions .button { min-height: 40px; padding-inline: 13px; }
      .hero-inner { gap: 30px; }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .nav-row { min-height: 68px; }
      .nav-links { top: 68px; }
      .brand { font-size: 16px; }
      .ai-page-logo { width: 32px; max-height: 32px; }
      .nav-actions .button { display: none; }
      .hero { padding: 55px 0 35px; }
      .hero-inner, .intro-grid, .media-grid, .network-layout, .contact-layout { grid-template-columns: 1fr; }
      .hero-inner { gap: 32px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-stats { grid-template-columns: repeat(2,1fr); margin-top: 36px; }
      .stat { padding: 16px 10px 0 0; }
      main section { padding: 54px 0; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 12px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .service-item { min-height: 0; padding: 16px; }
      .steps { grid-template-columns: repeat(2,1fr); gap: 26px 16px; }
      .step:not(:last-child)::after { display: none; }
      .industry-list { grid-template-columns: repeat(2,1fr); }
      .case-grid, .testimonial-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: repeat(2,1fr); }
      .partner-row, .footer-row { align-items: flex-start; flex-direction: column; }
      .contact-form { padding: 16px; }
      .float-contact { right: 12px; bottom: 13px; }
    }
    @media (max-width: 420px) {
      .service-grid, .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .hero-actions .button { width: 100%; }
      .console-flow { grid-template-columns: 1fr; }
      .flow-node:not(:last-child)::after { content: "↓"; margin-right: 0; }
      .article-list { grid-template-columns: 1fr 1fr; }
    }