:root {
      color-scheme: light;
      --ink: #172333;
      --muted: #596779;
      --paper: #f7f8fc;
      --white: #fff;
      --line: #e1e6ee;
      --blue: #2457eb;
      --blue-dark: #183ab0;
      --coral: #f0644d;
      --mint: #dff6ed;
      --lavender: #eceaff;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    }
    a { color: inherit; }
    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,.96); border-bottom: 1px solid var(--line); }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .brand img { width: 42px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { color: #344255; text-decoration: none; font-size: 14px; padding: 10px 11px; }
    .nav-links a:hover { color: var(--blue); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 18px; border: 0; border-radius: 5px; background: var(--blue); color: #fff; font-weight: 750; text-decoration: none; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
    .nav-cta:hover, .button:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 8px 18px rgba(36,87,235,.2); }
    .button.secondary { background: #fff; color: var(--ink); border: 1px solid #cbd4e1; }
    .button.secondary:hover { border-color: var(--blue); color: var(--blue); background: #fff; }
    .menu-toggle { display: none; width: 42px; height: 42px; background: #f1f4f9; border: 1px solid var(--line); border-radius: 5px; color: var(--ink); cursor: pointer; font-size: 20px; }
    .hero { padding: 72px 0 54px; overflow: hidden; background: linear-gradient(135deg,#f4f6ff 0%,#fff 58%,#fff1ec 100%); border-bottom: 1px solid #e6e9f2; }
    .hero-grid { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(280px,.85fr); gap: 42px; align-items: center; }
    .eyebrow { margin: 0 0 16px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 700px; margin: 0; font-size: clamp(38px,5vw,62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 20px 0 0; color: #4f5f74; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
    .hero-note { margin: 15px 0 0; color: #69768a; font-size: 13px; }
    .signal-panel { padding: 24px; border-left: 4px solid var(--coral); background: #fff; box-shadow: 0 16px 45px rgba(34,51,82,.09); animation: rise .7s both; }
    .signal-panel h2 { margin: 0 0 18px; font-size: 17px; }
    .signal-list { display: grid; gap: 0; }
    .signal-row { display: flex; justify-content: space-between; gap: 18px; padding: 12px 0; border-top: 1px solid var(--line); }
    .signal-row span:first-child { color: var(--muted); }
    .signal-row strong { text-align: right; }
    .signal-footer { margin-top: 14px; padding: 12px 14px; background: var(--mint); color: #14563e; font-size: 14px; font-weight: 700; }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: 40px; border: 1px solid var(--line); background: #fff; }
    .metric { padding: 18px 20px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--blue); font-size: 18px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 70px 0; border-bottom: 1px solid #e6e9f0; }
    .section-head { max-width: 720px; margin-bottom: 30px; }
    .section-head .eyebrow { margin-bottom: 8px; }
    h2 { margin: 0; font-size: clamp(27px,3vw,38px); line-height: 1.25; letter-spacing: 0; }
    .section-head p { margin: 12px 0 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 38px; align-items: start; }
    .intro-copy p { color: #46566a; margin: 0 0 14px; }
    .capability-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px 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: "＋"; color: var(--coral); padding-right: 9px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service { padding: 22px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--blue); transition: transform .2s, box-shadow .2s; }
    .service:nth-child(3n+2) { border-top-color: var(--coral); }
    .service:nth-child(3n) { border-top-color: #20a879; }
    .service:hover, .quote:hover { transform: translateY(-3px); box-shadow: 0 12px 25px rgba(25,42,70,.08); }
    .service h3, .quote h3 { margin: 0 0 8px; font-size: 18px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-tag { display: inline-block; margin-top: 14px; color: var(--blue); font-size: 12px; font-weight: 800; }
    .ribbon { padding: 26px; color: #fff; background: linear-gradient(110deg,#244fe0,#673fd2 55%,#e45c72); }
    .ribbon h2 { font-size: 25px; }
    .ribbon p { max-width: 830px; margin: 8px 0 0; color: #f2f3ff; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; counter-reset: step; }
    .step { padding: 20px 18px; background: #fff; border-bottom: 3px solid var(--blue); }
    .step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .step h3 { margin: 0 0 7px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .split { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
    .solution-list { margin: 0; padding-left: 20px; color: #46566a; }
    .solution-list li { margin: 0 0 12px; }
    .network { padding: 24px; background: var(--lavender); border-left: 4px solid #6457dc; }
    .network p { margin: 0 0 14px; color: #3e4661; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-cloud span { padding: 6px 10px; border: 1px solid #d8d7f3; background: #fff; color: #39415a; font-size: 13px; }
    .cases-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: start; }
    .case-feature { padding: 24px; background: #fff; border: 1px solid var(--line); }
    .case-feature h3 { margin: 0 0 8px; font-size: 20px; }
    .case-feature p { margin: 0; color: var(--muted); }
    .media-stack { display: grid; gap: 12px; }
    .media-frame { padding: 8px; background: #fff; border: 1px solid var(--line); }
    .media-frame img { display: block; width: 100%; height: auto; }
    .score-panel { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; padding: 20px 24px; background: #fff0eb; border-left: 4px solid var(--coral); }
    .score-panel strong { color: #ba3d2a; font-size: 22px; }
    .score-panel span { color: #683b32; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 740px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #edf1ff; color: #233c9b; font-size: 14px; }
    td { color: #405066; font-size: 14px; }
    tbody tr:last-child td { border-bottom: 0; }
    .good { color: #14724e; font-weight: 750; }
    .quotes { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .quote { padding: 20px; background: #fff; border: 1px solid var(--line); transition: transform .2s, box-shadow .2s; }
    .quote p { margin: 0 0 16px; color: #46566a; font-size: 14px; }
    .quote h3 { font-size: 14px; }
    .quote span { color: #788498; font-size: 12px; }
    .article-links { display: grid; grid-template-columns: repeat(5,1fr); gap: 10px; }
    .article-links a { padding: 14px; background: #fff; border: 1px solid var(--line); color: var(--blue); font-weight: 700; text-decoration: none; overflow-wrap: anywhere; }
    .article-links a:hover { border-color: var(--blue); }
    .contact-grid { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(250px,.9fr); gap: 30px; align-items: start; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; background: #fff; border: 1px solid var(--line); }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1/-1; }
    .field label { color: #344255; font-size: 13px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #cdd5e1; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .contact-info { display: grid; gap: 14px; }
    .contact-info address { padding: 18px; background: var(--mint); color: #174d3b; font-style: normal; }
    .contact-info address a { color: #174d3b; font-weight: 750; }
    .qr { width: 150px; margin-top: 12px; border: 5px solid #fff; }
    .affiliate { padding: 20px; border: 1px solid var(--line); background: #fff; }
    .affiliate p { margin: 0 0 12px; color: var(--muted); }
    .faq-list { display: grid; gap: 8px; }
    details { background: #fff; border: 1px solid var(--line); }
    summary { padding: 15px 18px; cursor: pointer; font-weight: 750; }
    details p { margin: 0; padding: 0 18px 16px; color: var(--muted); }
    .footer { padding: 24px 0; background: #edf0f5; color: #263447; }
    .footer-row { display: flex; justify-content: space-between; align-items: start; gap: 24px; }
    .footer p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer a { color: #284bb1; font-size: 13px; }
    .back-top { position: fixed; right: 18px; bottom: 18px; z-index: 12; width: 44px; height: 44px; border: 0; border-radius: 4px; background: var(--ink); color: #fff; font-size: 20px; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; }
    .back-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: translateY(0); }
    @keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
    @media (max-width: 920px) {
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 71px; left: 0; right: 0; padding: 10px 20px 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; }
      .hero-grid, .intro-grid, .split, .cases-grid, .contact-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .article-links { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 620px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .hero { padding-top: 48px; }
      .hero-grid { gap: 28px; }
      .hero-copy { font-size: 16px; }
      .metrics { grid-template-columns: repeat(2,1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding: 52px 0; }
      .service-grid, .workflow, .quotes { grid-template-columns: 1fr; }
      .capability-list { grid-template-columns: 1fr; }
      .article-links { grid-template-columns: 1fr 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .footer-row { flex-direction: column; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }