:root {
      color-scheme: light;
      --red: #b7212b;
      --red-dark: #8e1722;
      --red-soft: #fff1ef;
      --ink: #242326;
      --muted: #646168;
      --line: #e8e2e0;
      --paper: #fffdfb;
      --gold: #e6a643;
      --green: #316a53;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "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 { max-width: 100%; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,253,251,.96);
      border-bottom: 1px solid rgba(54,39,37,.1);
      backdrop-filter: blur(12px);
    }
    .header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .brand img { display: block; width: 39px; height: 39px; object-fit: contain; }
    .brand span { font-size: 17px; letter-spacing: 0; }
    .nav-wrap { display: flex; align-items: center; gap: 16px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; color: #4e4949; font-size: 12px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--red); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      padding: 11px 17px; border: 1px solid var(--red); border-radius: 4px;
      background: var(--red); color: #fff; font-weight: 700; transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { padding: 9px 14px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { background: var(--red-dark); box-shadow: 0 8px 20px rgba(128,20,30,.18); transform: translateY(-2px); }
    .button-light { background: #fff; color: var(--red); }
    .button-light:hover { background: #fff7f5; color: var(--red-dark); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); }
    .menu-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; background: currentColor; }
    .hero {
      position: relative; overflow: hidden; color: #fff;
      background: linear-gradient(118deg, #941923 0%, #bb2630 55%, #d3483d 100%);
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before {
      width: 540px; height: 540px; right: -130px; top: -230px;
      border: 1px solid rgba(255,255,255,.17); border-radius: 50%;
      box-shadow: 0 0 0 42px rgba(255,255,255,.035), 0 0 0 92px rgba(255,255,255,.025);
    }
    .hero::after { width: 280px; height: 280px; right: 16%; bottom: -220px; border: 1px solid rgba(255,255,255,.2); transform: rotate(45deg); }
    .hero-inner { position: relative; z-index: 1; padding-block: 76px 60px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 17px; color: #ffe4cf; font-size: 13px; font-weight: 700; }
    .eyebrow::before { content: ""; width: 25px; height: 2px; background: #f2bb64; }
    h1 { max-width: 720px; margin: 0; font-size: clamp(36px, 5vw, 62px); line-height: 1.15; letter-spacing: 0; }
    .hero-copy > p { max-width: 650px; margin: 20px 0 27px; color: #ffefec; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
    .hero .button { border-color: #fff; }
    .hero .button-light { border-color: #fff; }
    .hero .text-link { padding: 10px 4px; color: #fff; font-weight: 700; }
    .hero-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; max-width: 820px; margin-top: 54px; border-top: 1px solid rgba(255,255,255,.27); }
    .hero-stat { padding: 19px 22px 0 0; }
    .hero-stat + .hero-stat { padding-left: 22px; border-left: 1px solid rgba(255,255,255,.24); }
    .hero-stat strong { display: block; font-size: 18px; }
    .hero-stat span { color: #ffe5df; font-size: 12px; }
    .section { padding-block: 76px; }
    .section-tint { background: #f8f2ef; }
    .section-red { color: #fff; background: var(--red); }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-heading > div { max-width: 700px; }
    .kicker { margin: 0 0 8px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: 0; }
    .section-red .kicker { color: #ffd8cb; }
    h2 { margin: 0; font-size: clamp(27px, 3vw, 38px); line-height: 1.25; letter-spacing: 0; }
    .section-heading p, .lead { margin: 11px 0 0; color: var(--muted); }
    .section-red .section-heading p { color: #ffe9e4; }
    .section-link { color: var(--red); font-weight: 700; white-space: nowrap; }
    .section-red .section-link { color: #fff; }
    .about-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: start; }
    .about-copy p { color: var(--muted); margin: 15px 0 0; }
    .about-copy .lead { color: var(--ink); font-size: 18px; }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 24px; margin-top: 26px; }
    .capability-list div { padding: 13px 0; border-top: 1px solid var(--line); font-weight: 700; }
    .capability-list span { display: block; color: var(--muted); font-size: 13px; font-weight: 400; }
    .platform-note { padding: 25px 26px; border-left: 4px solid var(--red); background: #fff; box-shadow: 0 10px 28px rgba(52,32,29,.06); }
    .platform-note strong { display: block; margin-bottom: 10px; font-size: 18px; }
    .platform-note p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .service-item { min-height: 174px; padding: 21px; border: 1px solid var(--line); background: #fff; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #e6b9b4; box-shadow: 0 12px 26px rgba(68,31,28,.08); }
    .service-item .index { color: var(--red); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 9px 0 7px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag { padding: 6px 10px; border: 1px solid #e4d5d2; background: rgba(255,255,255,.72); color: #474044; font-size: 12px; }
    .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
    .workflow { counter-reset: step; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; margin-top: 29px; }
    .workflow article { position: relative; padding: 17px 20px 12px 0; border-top: 2px solid #e8c5bf; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: block; margin-top: -31px; margin-bottom: 18px; width: 38px; height: 38px; border-radius: 50%; background: var(--red); color: #fff; text-align: center; line-height: 38px; font-size: 12px; font-weight: 800; }
    .workflow h3 { margin: 0 0 7px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .price-band { padding: 25px; background: #fff; border: 1px solid var(--line); }
    .price-band h3 { margin: 0; font-size: 20px; }
    .price-band p { margin: 9px 0 16px; color: var(--muted); font-size: 14px; }
    .price-band .small-note { margin: 14px 0 0; font-size: 12px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
    .solution { padding: 22px 0 18px; border-top: 3px solid var(--red); border-bottom: 1px solid var(--line); }
    .solution h3 { margin: 0 0 9px; font-size: 18px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-row { display: grid; grid-template-columns: 180px 1fr; gap: 28px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.3); }
    .network-row strong { font-size: 17px; }
    .network-row p { margin: 0; color: #ffebe7; }
    .comparison { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; }
    th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    th { background: #f8f2ef; font-size: 13px; }
    td { color: #4d4949; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .rating { display: flex; align-items: center; gap: 18px; margin-bottom: 24px; padding: 21px 24px; border-left: 4px solid var(--gold); background: #fff8eb; }
    .rating strong { color: var(--red-dark); font-size: 35px; line-height: 1; }
    .stars { color: #b87413; font-size: 19px; letter-spacing: 0; }
    .rating span { display: block; color: var(--muted); font-size: 12px; }
    .rating p { margin: 0; font-weight: 700; }
    .case-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
    .case { background: #fff; border-bottom: 2px solid var(--red); }
    .case .case-image { aspect-ratio: 16 / 9; overflow: hidden; background: #eee6e2; }
    .case img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 17px 18px 20px; }
    .case-copy span { color: var(--red); font-size: 12px; font-weight: 800; }
    .case-copy h3 { margin: 5px 0 7px; font-size: 17px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
    .review { padding: 19px; background: #fff; border: 1px solid var(--line); }
    .review p { margin: 0 0 15px; color: #4f4a4a; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 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(--red); font-size: 23px; font-weight: 400; transition: transform .2s ease; }
    details[open] summary::after { transform: rotate(45deg); }
    details p { max-width: 850px; margin: 0; padding: 0 30px 18px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 28px; border-top: 1px solid var(--line); }
    .article-list a { display: flex; justify-content: space-between; gap: 18px; padding: 15px 0; border-bottom: 1px solid var(--line); color: #393536; }
    .article-list a:hover { color: var(--red); }
    .article-list span { color: var(--muted); font-size: 12px; white-space: nowrap; }
    .knowledge-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
    .knowledge { padding: 20px; background: #fff; border: 1px solid var(--line); }
    .knowledge h3 { margin: 0 0 8px; font-size: 16px; }
    .knowledge p { margin: 0; color: var(--muted); font-size: 13px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 25px 28px; background: var(--red); color: #fff; }
    .join-band h3 { margin: 0; font-size: 21px; }
    .join-band p { margin: 5px 0 0; color: #ffe9e4; font-size: 14px; }
    .join-band .button { flex: 0 0 auto; border-color: #fff; background: #fff; color: var(--red-dark); }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-details { margin-top: 22px; border-top: 1px solid var(--line); }
    .contact-line { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .contact-line strong { display: block; font-size: 13px; }
    .contact-line a, .contact-line span { color: var(--muted); font-size: 14px; }
    .qr-wrap { width: 132px; margin-top: 17px; padding: 8px; border: 1px solid var(--line); background: #fff; }
    .qr-wrap img { display: block; width: 100%; height: auto; }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 23px; border: 1px solid var(--line); background: #fff; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { color: #403c3c; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; border: 1px solid #dcd5d3; border-radius: 3px; background: #fff; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(183,33,43,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form .button { grid-column: 1 / -1; justify-self: start; cursor: pointer; }
    .footer { padding: 29px 0; background: #f0e9e6; color: #342f30; border-top: 1px solid #e2d9d6; }
    .footer-main { display: flex; align-items: start; justify-content: space-between; gap: 28px; }
    .footer-brand { font-weight: 800; }
    .footer p { margin: 6px 0 0; color: #625b5b; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 17px; max-width: 600px; }
    .footer-links a { color: #51494a; font-size: 12px; }
    .footer-links a:hover { color: var(--red); }
    .copyright { margin-top: 19px; padding-top: 13px; border-top: 1px solid #dcd2cf; color: #675f60; font-size: 12px; }
    .floating { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating a, .top-button { display: inline-flex; align-items: center; justify-content: center; min-width: 46px; min-height: 46px; padding: 0 12px; border: 1px solid #e6d2ce; border-radius: 4px; background: #fff; color: var(--red-dark); font-size: 12px; font-weight: 700; box-shadow: 0 5px 18px rgba(42,25,24,.12); cursor: pointer; }
    .top-button { display: none; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1050px) {
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 10px max(20px, calc((100% - var(--container)) / 2)); background: #fffdfb; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(40,25,25,.07); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: block; }
      .nav-wrap { gap: 10px; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 64px; }
      .nav-links { top: 64px; }
      .nav-links.is-open { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .nav-cta { padding: 8px 10px; font-size: 12px; }
      .brand img { width: 34px; height: 34px; }
      .brand span { font-size: 15px; }
      .hero-inner { padding-block: 58px 43px; }
      .hero-copy > p { font-size: 15px; }
      .hero-strip { margin-top: 39px; }
      .hero-stat { padding-right: 11px; }
      .hero-stat + .hero-stat { padding-left: 11px; }
      .hero-stat strong { font-size: 15px; }
      .hero-stat span { font-size: 11px; }
      .section { padding-block: 56px; }
      .section-heading { align-items: start; flex-direction: column; gap: 10px; margin-bottom: 23px; }
      .about-grid, .two-col, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .service-grid, .solution-grid, .case-grid, .review-grid, .knowledge-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .workflow { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 27px 10px; }
      .workflow article { padding-right: 12px; }
      .network-row { grid-template-columns: 1fr; gap: 5px; }
      .footer-main { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 520px) {
      .hero-inner { padding-block: 48px 36px; }
      h1 { font-size: 36px; }
      .hero-strip { grid-template-columns: 1fr; }
      .hero-stat, .hero-stat + .hero-stat { padding: 12px 0; border-left: 0; }
      .hero-stat + .hero-stat { border-top: 1px solid rgba(255,255,255,.22); }
      .service-grid, .solution-grid, .case-grid, .review-grid, .knowledge-grid, .capability-list, .article-list { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .rating { align-items: flex-start; flex-wrap: wrap; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .form { grid-template-columns: 1fr; padding: 17px; }
      .field-wide, .form .button { grid-column: auto; }
      .floating { right: 10px; bottom: 12px; }
      .floating a, .top-button { min-width: 42px; min-height: 42px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }