:root {
      color-scheme: light;
      --ink: #15243c;
      --muted: #596a82;
      --blue: #1456d9;
      --blue-dark: #103a8e;
      --cyan: #18b8d6;
      --line: #dce5f1;
      --paper: #f7f9fc;
      --white: #fff;
      --green: #087f68;
      --shadow: 0 16px 40px rgba(23, 57, 108, .09);
    }
    * { 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", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
    .container { width: min(1160px, 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);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; color: var(--blue-dark); }
    .brand img { width: 38px; max-height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 11px; color: #41536e; 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: 1px solid var(--blue); border-radius: 5px; padding: 11px 17px;
      background: var(--blue); color: #fff; font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s;
    }
    .nav-cta:hover, .button:hover { background: var(--blue-dark); box-shadow: 0 8px 20px rgba(20,86,217,.2); transform: translateY(-2px); }
    .button.secondary { background: #fff; color: var(--blue-dark); border-color: #9eb7e7; }
    .button.secondary:hover { background: #edf4ff; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 5px; padding: 8px 11px; }
    .hero {
      position: relative; overflow: hidden; color: #fff;
      background: linear-gradient(120deg, #103a8e 0%, #1456d9 58%, #087fae 100%);
    }
    .hero::before {
      content: ""; position: absolute; inset: 0; pointer-events: none;
      background: linear-gradient(90deg, transparent 49.9%, rgba(255,255,255,.08) 50%, transparent 50.1%),
                  linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
                  linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
      background-size: 100% 100%, 42px 42px, 42px 42px;
      mask-image: linear-gradient(90deg, #000, transparent 85%);
    }
    .hero-inner { position: relative; padding: 78px 0 64px; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr); align-items: center; gap: 44px; }
    .eyebrow { margin: 0 0 16px; color: #b9e9ff; font-size: 13px; font-weight: 700; letter-spacing: 0; }
    h1 { max-width: 700px; margin: 0; font-size: clamp(36px, 5vw, 58px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 660px; margin: 22px 0 28px; color: #e1edff; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero .button { border-color: #fff; background: #fff; color: var(--blue-dark); }
    .hero .button.secondary { border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.08); color: #fff; }
    .hero .button:hover { transform: translateY(-2px); }
    .hero-facts { border-left: 1px solid rgba(255,255,255,.33); padding-left: 28px; }
    .hero-facts h2 { margin: 0 0 18px; font-size: 16px; }
    .fact-line { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.2); color: #e1edff; font-size: 14px; }
    .fact-line strong { color: #fff; text-align: right; }
    .hero-tail { position: relative; padding: 15px 0; border-top: 1px solid rgba(255,255,255,.18); color: #e1edff; font-size: 13px; }
    .hero-tail span { color: #fff; font-weight: 700; margin-right: 8px; }
    main { overflow: hidden; }
    .section { padding: 70px 0; }
    .section.soft { background: #edf3fb; }
    .section.white { background: #fff; }
    .section-heading { max-width: 720px; margin-bottom: 30px; }
    .kicker { margin: 0 0 8px; color: var(--blue); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0 0 10px; font-size: clamp(27px, 3vw, 36px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p, .lead { margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 42px; align-items: start; }
    .intro-copy p { color: var(--muted); margin: 0 0 15px; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; margin: 22px 0 0; padding: 0; list-style: none; }
    .capability-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-weight: 650; font-size: 14px; }
    .capability-list li::before { content: "✓"; color: var(--green); margin-right: 9px; }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-block: 1px solid var(--line); }
    .metric { padding: 22px 20px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--blue-dark); font-size: 21px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { min-height: 156px; padding: 20px; border: 1px solid var(--line); border-top: 3px solid var(--blue); background: #fff; transition: transform .2s, box-shadow .2s; }
    .service-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .service-item h3, .case-card h3, .review h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p, .case-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag { border: 1px solid #c9d7eb; padding: 5px 10px; color: #344d72; background: #fff; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: steps; }
    .step { position: relative; padding: 0 22px 0 0; border-top: 2px solid #9eb8e2; counter-increment: steps; }
    .step::before { content: "0" counter(steps); position: relative; top: -14px; display: inline-block; padding-right: 10px; background: var(--paper); color: var(--blue); font-weight: 800; }
    .step h3 { margin: 0 0 7px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .industry { padding: 15px 16px; background: #fff; border: 1px solid var(--line); }
    .industry strong { display: block; font-size: 14px; }
    .industry span { color: var(--muted); font-size: 12px; }
    .network-band { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 26px 0; border-block: 1px solid var(--line); }
    .network-band p { max-width: 670px; margin: 0; color: var(--muted); }
    .comparison { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 680px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 14px; }
    th { background: #eaf1fc; color: #173764; }
    td:first-child { font-weight: 700; color: #283d5b; }
    .score { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 20px; margin-bottom: 22px; padding: 20px 24px; background: #103a8e; color: #fff; }
    .score-number { font-size: 42px; font-weight: 800; line-height: 1; }
    .stars { color: #ffda70; font-size: 20px; letter-spacing: 0; }
    .score p { margin: 4px 0 0; color: #e1edff; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 15px; }
    .case-card { border: 1px solid var(--line); background: #fff; }
    .case-card .media { aspect-ratio: 16 / 8; overflow: hidden; background: #e8edf4; }
    .case-card img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 17px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; border-left: 3px solid var(--cyan); background: #fff; }
    .review p { margin: 0 0 16px; color: #41536e; font-size: 14px; }
    .review h3 { font-size: 14px; }
    .review span { color: var(--muted); font-size: 12px; }
    .match-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 42px; align-items: start; }
    .match-aside { padding-top: 8px; }
    .match-aside p { color: var(--muted); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { color: #334660; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 11px 12px; border: 1px solid #cbd6e4; border-radius: 3px; background: #fff; color: var(--ink); }
    input:focus, select:focus, textarea:focus { outline: 2px solid rgba(20,86,217,.22); border-color: var(--blue); }
    textarea { min-height: 120px; resize: vertical; }
    .form-status { min-height: 24px; margin: 10px 0 0; color: var(--green); font-size: 13px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 34px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 3px; color: var(--blue); font-size: 21px; top: 10px; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 900px; margin: 0; 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: 14px; border-bottom: 2px solid var(--blue); background: #fff; color: #28466f; font-size: 13px; }
    .contact-row { display: grid; grid-template-columns: 1.2fr .8fr; gap: 34px; align-items: center; }
    .contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; margin-top: 18px; }
    .contact-details p { margin: 0; color: var(--muted); font-size: 14px; }
    .qr-block { display: flex; align-items: center; gap: 18px; justify-content: flex-end; }
    .qr-block img { display: block; width: 112px; height: 112px; object-fit: contain; background: #fff; border: 1px solid var(--line); padding: 5px; }
    .qr-block p { color: var(--muted); font-size: 13px; }
    .site-footer { background: #e8eef7; color: #243956; border-top: 1px solid #d1dceb; }
    .footer-main { padding: 28px 0; display: flex; align-items: flex-start; justify-content: space-between; gap: 25px; }
    .footer-main p { max-width: 520px; margin: 8px 0 0; color: #52647d; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: flex-end; font-size: 12px; color: #344e70; }
    .footer-bottom { padding: 12px 0; border-top: 1px solid #d1dceb; color: #52647d; font-size: 12px; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .floating a { display: block; padding: 10px 13px; border: 1px solid #c8d7ea; background: #fff; color: var(--blue-dark); box-shadow: 0 5px 18px rgba(23,57,108,.12); font-size: 12px; font-weight: 700; }
    .top-link { display: none; text-align: center; }
    .top-link.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: none; }
    @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: 980px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { padding: 9px 11px; font-size: 13px; }
      .hero-inner { grid-template-columns: 1fr .7fr; gap: 25px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(100% - 32px, 600px); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 10px 16px 15px; border-bottom: 1px solid var(--line); background: #fff; flex-direction: column; align-items: stretch; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px; font-size: 14px; }
      .hero-inner { grid-template-columns: 1fr; padding: 58px 0 34px; gap: 30px; }
      .hero-facts { border-left: 0; border-top: 1px solid rgba(255,255,255,.3); padding: 20px 0 0; }
      .hero-copy { font-size: 15px; }
      .section { padding: 52px 0; }
      .intro-grid, .match-layout, .contact-row { grid-template-columns: 1fr; gap: 25px; }
      .metric-grid { 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, .reviews { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; row-gap: 25px; }
      .step:nth-child(2) { border-top-color: #9eb8e2; }
      .case-grid { grid-template-columns: 1fr 1fr; }
      .article-links { grid-template-columns: 1fr 1fr; }
      .network-band { align-items: flex-start; flex-direction: column; gap: 12px; }
      .qr-block { justify-content: flex-start; }
      .footer-main { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 480px) {
      .service-grid, .reviews, .case-grid { grid-template-columns: 1fr; }
      .industry-grid { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr; gap: 22px; }
      .step { padding-bottom: 4px; }
      .capability-list { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .article-links { grid-template-columns: 1fr; }
      .contact-details { grid-template-columns: 1fr; }
      .floating { right: 10px; bottom: 10px; }
      .floating a { padding: 8px 10px; }
      .score { gap: 13px; padding: 17px; }
      .score-number { font-size: 34px; }
    }