:root {
      color-scheme: light;
      --ink: #1b2635;
      --muted: #617080;
      --line: #e4e9ef;
      --paper: #f7f9fc;
      --white: #fff;
      --blue: #2563eb;
      --cyan: #16a6a1;
      --coral: #f16952;
      --lime: #d7f36a;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      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; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { display: block; 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 var(--line); backdrop-filter: blur(12px); }
    .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; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .brand img { width: 36px; height: 36px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; gap: 0; list-style: none; padding: 0; margin: 0 auto; }
    .nav-links a { display: block; padding: 10px 12px; font-size: 13px; color: #485668; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); padding: 8px 12px; border-radius: 6px; cursor: pointer; }
    .button { display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 44px; padding: 0 18px; border: 1px solid transparent; border-radius: 5px; font-weight: 700; font-size: 14px; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,99,235,.18); }
    .button-primary { background: var(--blue); color: white; }
    .button-outline { border-color: #cbd5e1; background: white; color: var(--ink); }
    .hero { position: relative; overflow: hidden; background: linear-gradient(125deg, #e9f7f5 0%, #eef3ff 52%, #fff1ea 100%); }
    .hero::before { content: ""; position: absolute; width: 400px; height: 400px; border: 1px solid rgba(37,99,235,.14); border-radius: 50%; top: -230px; right: 8%; box-shadow: 0 0 0 28px rgba(37,99,235,.035), 0 0 0 58px rgba(22,166,161,.035); }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr); align-items: center; gap: 52px; padding-top: 76px; padding-bottom: 70px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #25635f; font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
    h1 { max-width: 680px; margin: 16px 0; font-size: clamp(38px, 5vw, 60px); line-height: 1.14; letter-spacing: 0; }
    .hero-copy { max-width: 610px; margin: 0; color: #4d5b6a; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 18px; color: #596878; font-size: 13px; }
    .hero-panel { position: relative; padding: 25px; background: rgba(255,255,255,.76); border: 1px solid rgba(255,255,255,.95); box-shadow: 0 20px 54px rgba(40,63,95,.11); }
    .panel-top { display: flex; justify-content: space-between; gap: 15px; align-items: center; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
    .panel-top strong { font-size: 15px; }
    .live-mark { display: inline-flex; align-items: center; gap: 7px; color: #27766f; font-size: 12px; }
    .live-mark::before { content: ""; width: 7px; height: 7px; background: #36b38b; border-radius: 50%; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; padding: 18px 0 4px; }
    .model-cloud span, .tag-cloud span { padding: 6px 10px; background: #f0f5f8; border-radius: 3px; color: #425264; font-size: 12px; }
    .panel-foot { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 19px; padding-top: 17px; border-top: 1px solid var(--line); }
    .panel-foot strong { display: block; font-size: 17px; }
    .panel-foot span { color: var(--muted); font-size: 12px; }
    .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; background: white; border-bottom: 1px solid var(--line); }
    .stat { padding: 21px 16px; text-align: center; border-right: 1px solid var(--line); }
    .stat:last-child { border-right: 0; }
    .stat strong { display: block; font-size: 18px; }
    .stat span { color: var(--muted); font-size: 12px; }
    .section { padding: 78px 0; }
    .section-tint { background: #f0f4f7; }
    .section-white { background: white; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 32px; }
    .section-heading > div { max-width: 690px; }
    .section-kicker { margin: 0 0 8px; color: #167e79; font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-heading p { margin: 10px 0 0; color: var(--muted); }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
    .about-copy { color: #526171; }
    .about-copy p:first-child { margin-top: 0; }
    .about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; border-top: 1px solid var(--line); }
    .about-point { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .about-point strong { display: block; font-size: 15px; }
    .about-point span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .service-item { min-height: 157px; padding: 20px; background: white; border: 1px solid #e5eaf0; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover, .quote:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(30,50,75,.09); }
    .service-index { color: var(--coral); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 12px 0 6px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .showcase { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: start; }
    .showcase-main { overflow: hidden; background: white; border: 1px solid var(--line); }
    .showcase-main .media-frame { background: #edf1f4; }
    .showcase-main .media-frame img { width: 100%; aspect-ratio: 16 / 8; object-fit: cover; }
    .showcase-copy { padding: 20px 22px; }
    .showcase-copy h3 { margin: 0 0 6px; font-size: 19px; }
    .showcase-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .showcase-side { display: grid; gap: 18px; }
    .showcase-small { display: grid; grid-template-columns: 132px 1fr; background: white; border: 1px solid var(--line); }
    .showcase-small img { width: 132px; height: 100%; min-height: 124px; object-fit: cover; }
    .showcase-small .showcase-copy { padding: 15px; }
    .showcase-small h3 { font-size: 16px; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
    .step { position: relative; padding-top: 19px; border-top: 2px solid #d5dde5; counter-increment: step; }
    .step::before { content: "0" counter(step); position: absolute; top: -16px; left: 0; padding: 0 10px 0 0; background: var(--paper); color: var(--blue); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 0 0 6px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 28px; }
    .solution { padding: 18px 0; border-bottom: 1px solid var(--line); }
    .solution h3 { margin: 0 0 5px; font-size: 16px; }
    .solution p { margin: 0; color: var(--muted); font-size: 13px; }
    .network-band { display: grid; grid-template-columns: .8fr 1.2fr; gap: 36px; align-items: center; padding: 32px; background: #e9f5f2; border-left: 4px solid var(--cyan); }
    .network-band h2 { font-size: 26px; }
    .network-band p { margin: 10px 0 0; color: #53656d; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .tag-cloud span { background: white; border: 1px solid #dce7e5; }
    .comparison { border: 1px solid var(--line); background: white; }
    .score-strip { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; align-items: center; padding: 23px 25px; background: #f1f8f6; border-bottom: 1px solid var(--line); }
    .score-strip strong { font-size: 21px; }
    .stars { color: #df8b20; letter-spacing: 0; }
    .score { display: flex; align-items: baseline; gap: 5px; }
    .score b { color: #147c73; font-size: 29px; }
    .table-scroll { overflow-x: auto; }
    table { width: 100%; min-width: 680px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 18px; border-bottom: 1px solid var(--line); font-size: 13px; }
    th { color: #465363; background: #fafbfd; font-weight: 700; }
    td:last-child { color: #177d74; font-weight: 700; }
    .compare-note { padding: 12px 18px; color: var(--muted); font-size: 12px; }
    .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 20px; background: white; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { margin: 0 0 17px; color: #445363; font-size: 14px; }
    .quote cite { color: #167e79; font-size: 12px; font-style: normal; font-weight: 700; }
    .split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
    .price-note { padding: 24px; background: #eef3ff; border-left: 4px solid var(--blue); }
    .price-note h3 { margin: 0 0 8px; font-size: 18px; }
    .price-note p { margin: 0; color: #566477; font-size: 14px; }
    .article-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
    .article-list li { border-bottom: 1px solid var(--line); }
    .article-list a { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 13px 0; font-size: 14px; }
    .article-list a:hover { color: var(--blue); }
    .arrow { color: #8793a1; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 17px 0; font-weight: 700; cursor: pointer; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 15px; color: var(--blue); font-size: 22px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { margin: 0; padding: 0 38px 17px 0; color: var(--muted); font-size: 14px; }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .contact-details { display: grid; gap: 15px; margin-top: 24px; }
    .contact-line { display: flex; justify-content: space-between; gap: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
    .contact-line span { color: var(--muted); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 24px; background: white; border: 1px solid var(--line); }
    .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 #d8e0e8; border-radius: 4px; background: #fff; padding: 11px 12px; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
    .field textarea { min-height: 114px; resize: vertical; }
    .form-message { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 12px; }
    .contact-form .button { justify-self: start; }
    .footer { background: #edf1f5; border-top: 1px solid #dce3ea; color: #253346; }
    .footer-main { display: flex; justify-content: space-between; align-items: start; gap: 28px; padding: 30px 0 21px; }
    .footer-brand { max-width: 430px; }
    .footer-brand strong { font-size: 17px; }
    .footer-brand p { margin: 7px 0 0; color: #5f6c79; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; max-width: 520px; }
    .footer-links a { color: #44566a; font-size: 12px; }
    .footer-bottom { padding: 13px 0; border-top: 1px solid #dce3ea; color: #667383; font-size: 12px; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 24px; display: grid; gap: 8px; }
    .float-link { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 0 12px; border: 1px solid #d9e2ea; background: white; color: #233245; box-shadow: 0 5px 16px rgba(23,43,66,.12); font-size: 12px; font-weight: 700; }
    .float-link:hover { color: var(--blue); }
    .reveal { opacity: 0; transform: translateY(12px); 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; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 10px 20px 16px; background: white; border-bottom: 1px solid var(--line); flex-wrap: wrap; justify-content: center; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 11px; }
      .menu-toggle { display: inline-flex; }
      .nav-actions .button { min-height: 40px; padding-inline: 13px; }
      .hero-inner { gap: 30px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; gap: 10px; }
      .brand { font-size: 16px; }
      .brand img { width: 32px; height: 32px; }
      .nav-links { top: 64px; }
      .nav-actions .button-outline { display: none; }
      .hero-inner { grid-template-columns: 1fr; padding-top: 51px; padding-bottom: 38px; gap: 28px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { padding: 19px; }
      .stats { grid-template-columns: 1fr 1fr; }
      .stat:nth-child(2) { border-right: 0; }
      .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding: 56px 0; }
      .section-heading { display: block; margin-bottom: 24px; }
      h2 { font-size: 27px; }
      .about-grid, .showcase, .split, .contact-layout, .network-band { grid-template-columns: 1fr; gap: 25px; }
      .about-points { gap: 0 16px; }
      .service-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
      .service-item { min-height: 0; padding: 16px; }
      .service-item h3 { font-size: 15px; }
      .showcase-small { grid-template-columns: 105px 1fr; }
      .showcase-small img { width: 105px; min-height: 112px; }
      .steps { grid-template-columns: 1fr 1fr; gap: 26px 18px; }
      .solution-list { grid-template-columns: 1fr 1fr; gap: 0 16px; }
      .network-band { padding: 23px; }
      .quotes { grid-template-columns: 1fr; }
      .contact-form { padding: 17px; }
      .footer-main { display: grid; padding-top: 25px; }
      .footer-links { justify-content: flex-start; }
      .floating { right: 10px; bottom: 14px; }
      .float-link { min-width: 40px; min-height: 40px; padding: 0 9px; }
    }
    @media (max-width: 420px) {
      .nav-actions .button-primary { padding-inline: 10px; font-size: 12px; }
      h1 { font-size: 36px; }
      .hero-actions .button { flex: 1 1 100%; }
      .service-grid, .solution-list { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field-wide, .form-message { grid-column: auto; }
      .score-strip { align-items: flex-start; flex-direction: column; }
    }