:root {
      color-scheme: light;
      --ink: #142b49;
      --muted: #536781;
      --blue: #1254d8;
      --blue-deep: #103c9f;
      --cyan: #16a9c9;
      --line: #dce6f2;
      --paper: #ffffff;
      --wash: #f2f7ff;
      --mint: #eaf8f4;
      --max: 1180px;
      --side: 22px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      color: var(--ink);
      background: linear-gradient(180deg, #f5f8ff 0%, #fff 34%, #f6faff 72%, #edf5ff 100%);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--max), calc(100% - var(--side) * 2)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,255,255,.95);
      border-bottom: 1px solid rgba(220,230,242,.9);
      backdrop-filter: blur(14px);
    }
    .header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 72px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; font-weight: 800; }
    .ai-page-logo { display: block; width: 40px; max-width: 100%; height: auto; }
    .brand-name { font-size: 18px; letter-spacing: 0; }
    .nav-area { display: flex; align-items: center; gap: 22px; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 10px 12px; color: #304761; text-decoration: none; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 0; border-radius: 5px; padding: 11px 17px; background: var(--blue);
      color: #fff; text-decoration: none; font-weight: 700; cursor: pointer;
      box-shadow: 0 7px 18px rgba(18,84,216,.19);
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta:hover, .button:hover { background: var(--blue-deep); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(18,84,216,.25); }
    .button-secondary { background: #fff; color: var(--blue-deep); border: 1px solid #b8ccef; box-shadow: none; }
    .button-secondary:hover { background: #edf4ff; color: var(--blue-deep); }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); padding: 8px 11px; cursor: pointer; }
    .hero { overflow: hidden; position: relative; padding: 75px 0 38px; background: linear-gradient(118deg, #eaf2ff 0%, #f9fbff 53%, #e7f8f8 100%); }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(18,84,216,.13); transform: rotate(34deg); }
    .hero::before { width: 360px; height: 360px; right: -120px; top: -115px; border-radius: 28px; }
    .hero::after { width: 220px; height: 220px; right: 26px; top: 42px; border-radius: 18px; }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(270px, .7fr); gap: 54px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--blue-deep); font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--cyan); }
    h1 { max-width: 720px; margin: 15px 0 17px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; color: #3e5571; font-size: 17px; margin: 0 0 25px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin-top: 19px; color: #526b87; font-size: 13px; }
    .hero-console { position: relative; padding: 22px; border: 1px solid #c9d8ed; background: rgba(255,255,255,.76); box-shadow: 15px 18px 0 rgba(18,84,216,.06); }
    .console-top { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); padding-bottom: 15px; font-weight: 800; }
    .console-tag { font-size: 11px; color: #087a79; background: #dff5f0; padding: 5px 8px; }
    .console-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding-top: 16px; }
    .console-item { min-height: 76px; padding: 12px; background: #f3f7fd; border-left: 3px solid #3b78df; }
    .console-item strong { display: block; font-size: 14px; }
    .console-item span { color: var(--muted); font-size: 12px; }
    .hero-strip { position: relative; z-index: 1; margin-top: 48px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #d5e2f1; }
    .metric { padding: 17px 20px 0 0; }
    .metric strong { display: block; font-size: 16px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main section { padding: 66px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 28px; }
    .section-head h2 { margin: 6px 0 0; font-size: 30px; line-height: 1.25; letter-spacing: 0; }
    .section-head p { max-width: 560px; margin: 0; color: var(--muted); }
    .kicker { color: var(--blue); text-transform: uppercase; font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    .intro-band { background: #fff; border-block: 1px solid #e5ecf5; }
    .intro-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 46px; align-items: start; }
    .intro-layout h2 { margin: 8px 0 12px; font-size: 30px; }
    .intro-layout p { margin: 0; color: var(--muted); }
    .intro-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; }
    .intro-point { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .intro-point strong { display: block; margin-bottom: 4px; }
    .intro-point span { color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service { padding: 20px; border: 1px solid var(--line); background: #fff; transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
    .service:hover { transform: translateY(-4px); border-color: #a9c4f0; box-shadow: 0 12px 24px rgba(19,58,113,.08); }
    .service-index { color: var(--cyan); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 8px 0; font-size: 17px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-more { display: inline-block; margin-top: 12px; color: var(--blue-deep); font-size: 13px; font-weight: 700; text-decoration: none; }
    .workflow { background: #eaf2ff; border-block: 1px solid #d9e6f8; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: steps; }
    .step { position: relative; padding: 0 24px 0 0; counter-increment: steps; }
    .step::before { content: "0" counter(steps); display: block; color: var(--blue); font-size: 13px; font-weight: 800; margin-bottom: 12px; }
    .step:not(:last-child)::after { content: ""; position: absolute; height: 1px; background: #9bb7de; top: 10px; left: 40px; right: 16px; }
    .step h3 { margin: 0 0 6px; font-size: 16px; }
    .step p { margin: 0; max-width: 240px; color: var(--muted); font-size: 14px; }
    .industry-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .industry-list { border-top: 1px solid var(--line); }
    .industry-row { display: grid; grid-template-columns: 130px 1fr; gap: 16px; padding: 15px 0; border-bottom: 1px solid var(--line); }
    .industry-row strong { color: var(--blue-deep); }
    .industry-row span { color: var(--muted); font-size: 14px; }
    .asset-stack { display: grid; gap: 12px; }
    .asset-stack figure { margin: 0; overflow: hidden; border: 1px solid var(--line); background: #fff; }
    .asset-stack img { display: block; width: 100%; height: auto; }
    .asset-stack figcaption { padding: 10px 13px; color: var(--muted); font-size: 13px; }
    .network { color: #fff; background: #123b82; }
    .network .section-head p, .network .kicker { color: #c6dcff; }
    .network-list { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-list span { border: 1px solid rgba(255,255,255,.28); padding: 8px 12px; color: #f2f7ff; font-size: 13px; }
    .comparison { background: #fff; border-block: 1px solid #e2eaf5; }
    .score-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 20px; margin-bottom: 18px; color: #fff; background: linear-gradient(100deg, #1446a0, #1268b8); }
    .score-row strong { font-size: 18px; }
    .score-number { font-size: 25px; font-weight: 800; white-space: nowrap; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; min-width: 680px; background: #fff; }
    th, td { padding: 13px 15px; text-align: left; border-bottom: 1px solid var(--line); }
    th { background: #eff5ff; color: #24456f; font-size: 13px; }
    td { color: #425772; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .price-note { margin: 14px 0 0; color: var(--muted); font-size: 13px; }
    .cases { background: #f3f8ff; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { background: #fff; border-top: 3px solid var(--cyan); padding: 20px; }
    .case h3 { margin: 0 0 8px; font-size: 17px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-label { display: inline-block; margin-top: 14px; color: var(--blue); font-size: 12px; font-weight: 800; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
    .review { padding: 18px; border: 1px solid var(--line); background: #fff; }
    .review p { margin: 0 0 14px; color: #3f5570; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: #73849a; font-size: 12px; }
    .feedback-note { color: var(--muted); font-size: 12px; margin: 16px 0 0; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 35px 16px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 12px; color: var(--blue); font-size: 23px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; max-width: 850px; padding: 0 30px 17px 0; color: var(--muted); font-size: 14px; }
    .article-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-links a { padding: 13px; border-left: 2px solid var(--cyan); background: #fff; text-decoration: none; font-size: 13px; transition: background .2s ease; }
    .article-links a:hover { background: #e9f4ff; }
    .article-links small { display: block; color: var(--muted); margin-top: 4px; }
    .match { background: #e8f5f4; border-block: 1px solid #d2eae6; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 46px; align-items: start; }
    .match-copy h2 { margin: 7px 0 12px; font-size: 30px; }
    .match-copy p { color: var(--muted); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #c9d9df; border-radius: 3px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(18,84,216,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-foot { display: flex; align-items: center; gap: 14px; margin-top: 15px; }
    .form-foot small { color: var(--muted); }
    .contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 35px; align-items: start; }
    .contact-items { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
    .contact-item { padding: 12px 0; border-bottom: 1px solid var(--line); }
    .contact-item strong { display: block; font-size: 13px; }
    .contact-item a, .contact-item span { color: var(--muted); text-decoration: none; font-size: 14px; }
    .qr { width: 132px; border: 1px solid var(--line); padding: 6px; background: #fff; }
    .join-panel { padding: 20px; background: #edf4ff; border-left: 3px solid var(--blue); }
    .join-panel h3 { margin: 0 0 8px; }
    .join-panel p { margin: 0 0 15px; color: var(--muted); font-size: 14px; }
    .links-section { padding-top: 32px; padding-bottom: 38px; background: #f3f8ff; }
    .friend-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .friend-links a { color: #345a86; font-size: 13px; text-decoration: none; }
    .friend-links a:hover { color: var(--blue); text-decoration: underline; }
    .site-footer { padding: 20px 0; color: #dce9ff; background: #102d5c; font-size: 12px; }
    .footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 15px; }
    .footer-inner a { color: #fff; text-decoration: none; }
    .back-top { position: fixed; right: 18px; bottom: 18px; z-index: 15; width: 42px; height: 42px; border: 1px solid #c5d8f1; background: #fff; color: var(--blue-deep); cursor: pointer; box-shadow: 0 5px 16px rgba(17,52,101,.13); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
    .back-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-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) {
      .nav-area { gap: 10px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-links { display: none; position: absolute; top: 71px; left: 0; right: 0; padding: 10px var(--side) 16px; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px 0; border-bottom: 1px solid #edf1f6; }
      .hero-inner { gap: 30px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-links { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 650px) {
      :root { --side: 18px; }
      .header-inner { min-height: 64px; }
      .brand-name { font-size: 16px; }
      .ai-page-logo { width: 34px; }
      .nav-cta { padding: 9px 11px; font-size: 12px; }
      .nav-links { top: 63px; }
      .hero { padding-top: 51px; }
      .hero-inner, .intro-layout, .industry-layout, .match-layout, .contact-grid { grid-template-columns: 1fr; }
      .hero-inner { gap: 30px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); gap: 14px 10px; margin-top: 34px; }
      .metric { padding-top: 13px; }
      main section { padding: 48px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 10px; }
      .section-head h2, .intro-layout h2, .match-copy h2 { font-size: 25px; }
      .intro-points { grid-template-columns: 1fr; }
      .service-grid, .case-grid, .reviews { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr 1fr; gap: 22px 14px; }
      .step:not(:last-child)::after { display: none; }
      .industry-row { grid-template-columns: 105px 1fr; gap: 10px; }
      .article-links { grid-template-columns: 1fr 1fr; }
      .score-row { align-items: flex-start; flex-direction: column; gap: 5px; }
      .form-grid, .contact-items { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .form-foot { align-items: flex-start; flex-direction: column; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
    }