:root {
      color-scheme: light;
      --ink: #192536;
      --muted: #59687b;
      --line: #dfe5ed;
      --paper: #f7f8fb;
      --white: #fff;
      --navy: #172b45;
      --cyan: #087e8b;
      --coral: #be4c45;
      --lime: #d8ee78;
      --shadow: 0 14px 36px rgba(23,43,69,.08);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 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(12px);
    }
    .nav-row { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; flex: 0 0 auto; font-weight: 750; }
    .brand img { display: block; width: 42px; max-height: 42px; object-fit: contain; }
    .brand span { font-size: 17px; white-space: nowrap; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 10px 11px; color: #435267; font-size: 13px; text-decoration: none; }
    .nav-links a:hover { color: var(--cyan); }
    .nav-actions { display: flex; align-items: center; gap: 9px; flex: 0 0 auto; }
    .menu-toggle { display: none; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 45px; padding: 0 18px; border: 1px solid transparent;
      color: #fff; background: var(--navy); text-decoration: none; font-weight: 700;
      cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 20px rgba(23,43,69,.18); }
    .button--bright { color: var(--ink); background: var(--lime); }
    .button--outline { color: var(--ink); background: transparent; border-color: #aeb9c8; }
    .hero {
      position: relative; overflow: hidden; padding: 72px 0 52px;
      background:
        linear-gradient(112deg, transparent 0 63%, rgba(8,126,139,.075) 63% 63.2%, transparent 63.2%),
        linear-gradient(20deg, transparent 0 77%, rgba(190,76,69,.07) 77% 77.2%, transparent 77.2%),
        #f7f8fb;
    }
    .hero::after {
      content: ""; position: absolute; width: 350px; height: 350px; right: -110px; top: 20px;
      border: 1px solid rgba(8,126,139,.2); border-radius: 50%;
      box-shadow: 0 0 0 28px rgba(8,126,139,.035), 0 0 0 58px rgba(190,76,69,.025);
      pointer-events: none; animation: orbit 18s linear infinite;
    }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.1fr) minmax(300px,.8fr); gap: 50px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--cyan); font-size: 13px; font-weight: 750; letter-spacing: .04em; }
    .eyebrow::before { content: ""; width: 25px; height: 2px; background: var(--coral); }
    h1 { max-width: 700px; margin: 17px 0 18px; color: var(--navy); font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 625px; margin: 0; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 17px; color: #68788b; font-size: 13px; }
    .hero-console { padding: 22px; border: 1px solid #cdd7e2; background: rgba(255,255,255,.82); box-shadow: var(--shadow); }
    .console-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
    .console-head strong { color: var(--navy); font-size: 15px; }
    .signal { display: inline-flex; align-items: center; gap: 7px; color: #087e65; font-size: 12px; }
    .signal::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #34a884; }
    .console-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 15px; }
    .console-item { min-height: 93px; padding: 13px; background: #f2f5f8; border-left: 3px solid var(--cyan); }
    .console-item:nth-child(2n) { border-left-color: var(--coral); }
    .console-item b { display: block; color: var(--navy); font-size: 15px; }
    .console-item span { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; }
    .hero-ticker { display: flex; gap: 8px; overflow: hidden; margin-top: 16px; }
    .hero-ticker span { flex: 0 0 auto; padding: 5px 9px; color: #405168; background: #e8edf2; font-size: 11px; }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 46px; border-top: 1px solid #d5dce5; border-bottom: 1px solid #d5dce5; }
    .metric { padding: 17px 18px; border-right: 1px solid #d5dce5; }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--navy); font-size: 17px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section--white { background: #fff; }
    .section--tint { background: #edf2f4; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
    .section-head h2 { margin: 8px 0 0; color: var(--navy); font-size: clamp(27px, 3vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 540px; margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 46px; align-items: start; }
    .intro-copy { color: var(--muted); font-size: 16px; }
    .intro-copy p:first-child { margin-top: 0; }
    .intro-points { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
    .intro-point { padding: 16px 0; border-top: 1px solid var(--line); }
    .intro-point b { display: block; margin-bottom: 4px; color: var(--navy); }
    .intro-point span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
    .service { min-height: 176px; padding: 19px; border: 1px solid var(--line); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .service:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .service .index { color: var(--coral); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 9px 0 7px; color: var(--navy); font-size: 17px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .service--wide { grid-column: span 2; background: var(--navy); border-color: var(--navy); }
    .service--wide h3, .service--wide p { color: #fff; }
    .service--wide p { color: #d2dce8; }
    .service--wide .index { color: var(--lime); }
    .workflows { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: steps; border-top: 1px solid #ccd5df; }
    .workflow { position: relative; padding: 24px 22px 18px 0; counter-increment: steps; }
    .workflow::before { content: "0" counter(steps); display: block; margin-bottom: 17px; color: var(--cyan); font-size: 13px; font-weight: 800; }
    .workflow:not(:last-child)::after { content: ""; position: absolute; top: 33px; right: 14px; width: 45%; height: 1px; background: #bfcbd6; }
    .workflow h3 { margin: 0 0 7px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
    .industry { padding: 20px 0; border-top: 3px solid var(--cyan); }
    .industry:nth-child(2) { border-color: var(--coral); }
    .industry:nth-child(3) { border-color: #a5b638; }
    .industry h3 { margin: 0 0 8px; color: var(--navy); font-size: 19px; }
    .industry p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-band { display: grid; grid-template-columns: 1fr 1.3fr; gap: 40px; align-items: start; padding: 30px; color: #fff; background: var(--navy); }
    .network-band h2 { margin: 0 0 11px; color: #fff; font-size: 29px; }
    .network-band p { margin: 0; color: #d4deea; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-list span { padding: 7px 10px; color: #edf4fa; border: 1px solid #60748c; font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; align-items: start; }
    .case-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: center; padding: 24px; background: #fff; border: 1px solid var(--line); }
    .media-frame { overflow: hidden; background: #e7edf0; }
    .media-frame img { display: block; width: 100%; height: auto; object-fit: contain; }
    .case-feature h3, .case-side h3 { margin: 0 0 8px; color: var(--navy); font-size: 21px; }
    .case-feature p, .case-side p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-side { display: grid; gap: 16px; }
    .case-side article { padding: 20px; border: 1px solid var(--line); background: #fff; }
    .case-side .media-frame { margin-top: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); }
    .review blockquote { margin: 0; color: #35465a; font-size: 14px; }
    .review footer { margin-top: 15px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .review footer strong { display: block; color: var(--navy); font-size: 13px; }
    .rating-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 32px; align-items: stretch; }
    .rating-score { padding: 28px; color: #fff; background: var(--navy); }
    .rating-score span { display: block; color: #dbe4ed; font-size: 13px; }
    .rating-score strong { display: block; margin: 8px 0; color: var(--lime); font-size: 54px; line-height: 1; }
    .stars { color: var(--lime); font-size: 23px; letter-spacing: 2px; }
    .rating-score p { margin: 15px 0 0; color: #dbe4ed; font-size: 13px; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; min-width: 590px; text-align: left; }
    th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); font-size: 13px; }
    th { color: var(--navy); background: #edf2f4; }
    td:last-child { color: #087e65; font-weight: 650; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
    .tag-cloud span { padding: 7px 11px; color: #30445a; background: #e4ebef; font-size: 13px; }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field--full { grid-column: 1 / -1; }
    .field label { color: #314258; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; color: var(--ink); background: #fff; border: 1px solid #c7d1dc; border-radius: 0; }
    .field textarea { min-height: 116px; resize: vertical; }
    .form button { justify-self: start; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 30px 17px 0; color: var(--navy); font-weight: 700; cursor: pointer; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 2px; top: 13px; color: var(--cyan); font-size: 22px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { margin: 0; padding: 0 20px 17px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); border-top: 1px solid var(--line); }
    .article-list a { padding: 17px 14px 17px 0; color: var(--navy); text-decoration: none; border-bottom: 1px solid var(--line); font-size: 14px; }
    .article-list a::after { content: " ↗"; color: var(--coral); }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
    .contact-info { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .contact-item { padding: 15px 0; border-top: 1px solid var(--line); }
    .contact-item span { display: block; color: var(--muted); font-size: 12px; }
    .contact-item strong, .contact-item a { color: var(--navy); font-size: 14px; text-decoration: none; }
    .qr { width: 130px; padding: 8px; border: 1px solid var(--line); background: #fff; }
    .qr img { display: block; width: 100%; }
    .footer { padding: 30px 0; color: #dce4ed; background: #172b45; }
    .footer-row { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
    .footer p { margin: 0; color: #dce4ed; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 9px 17px; justify-content: flex-end; }
    .footer-links a { color: #edf2f7; font-size: 12px; text-decoration: none; }
    .float-tools { position: fixed; right: 16px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .float-tools a, .float-tools button { display: grid; place-items: center; width: 46px; height: 46px; padding: 4px; color: #fff; background: var(--navy); border: 0; text-align: center; text-decoration: none; font-size: 11px; cursor: pointer; box-shadow: 0 5px 18px rgba(23,43,69,.18); }
    .float-tools a:first-child { color: var(--ink); background: var(--lime); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (max-width: 960px) {
      .nav-links { display: none; position: absolute; top: 74px; left: 0; right: 0; padding: 12px 20px 18px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3,1fr); }
      .nav-links a { padding: 10px 8px; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; color: var(--navy); background: #fff; border: 1px solid var(--line); cursor: pointer; }
      .nav-actions .button { display: none; }
      .hero-inner { gap: 28px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(100% - 30px, 1180px); }
      .nav-row { min-height: 66px; gap: 12px; }
      .brand img { width: 36px; max-height: 36px; }
      .brand span { font-size: 15px; }
      .nav-links { top: 66px; }
      .nav-links.is-open { grid-template-columns: repeat(2,1fr); }
      .hero { padding: 49px 0 35px; }
      .hero-inner, .intro-grid, .case-grid, .rating-layout, .match-layout, .contact-grid { grid-template-columns: 1fr; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-console { padding: 16px; }
      .metrics { grid-template-columns: 1fr 1fr; margin-top: 32px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid #d5dce5; }
      .section { padding: 55px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .intro-points { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
      .service { min-height: 0; padding: 15px; }
      .service--wide { grid-column: span 2; }
      .workflows { grid-template-columns: 1fr 1fr; }
      .workflow:not(:last-child)::after { display: none; }
      .industry-grid { grid-template-columns: 1fr; gap: 4px; }
      .network-band { grid-template-columns: 1fr; padding: 22px; gap: 20px; }
      .case-feature { grid-template-columns: 1fr; padding: 17px; }
      .review-grid { grid-template-columns: 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .form { grid-template-columns: 1fr; }
      .field--full { grid-column: auto; }
      .contact-info { grid-template-columns: 1fr 1fr; }
      .footer-row { display: grid; }
      .footer-links { justify-content: flex-start; }
      .float-tools { right: 10px; bottom: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }