:root {
      --ink: #17212f;
      --muted: #667085;
      --line: #d9e0e8;
      --panel: #f6f8fb;
      --brand: #087f8c;
      --accent: #f2a541;
      --deep: #12343b;
      --white: #fff;
      color-scheme: light;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--white);
      line-height: 1.55;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    .wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

    header {
      position: sticky;
      top: 0;
      z-index: 10;
      background: rgba(255, 255, 255, .94);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(14px);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 72px;
      gap: 24px;
    }
    .brand {
      display: flex;
      align-items: center;
      width: 178px;
      min-width: 150px;
    }
    .brand-logo {
      width: 100%;
      height: 52px;
      object-fit: contain;
      object-position: left center;
    }
    nav {
      display: flex;
      align-items: center;
      gap: 20px;
      color: #344054;
      font-size: 14px;
      font-weight: 650;
    }
    nav a:hover,
    nav a.active { color: var(--brand); }
    nav a.active { font-weight: 850; }
    .nav-cta {
      padding: 10px 14px;
      color: var(--white);
      background: var(--deep);
      border-radius: 6px;
    }
    .menu-button { display: none; }

    .hero {
      min-height: calc(100svh - 72px);
      display: grid;
      align-items: end;
      color: var(--white);
      background:
        linear-gradient(90deg, rgba(18, 52, 59, .94), rgba(18, 52, 59, .55) 54%, rgba(18, 52, 59, .18)),
        url("https://images.unsplash.com/photo-1558002038-1055907df827?auto=format&fit=crop&w=1800&q=80") center / cover;
    }
    .hero-inner { padding: 92px 0 72px; }
    .eyebrow {
      display: inline-flex;
      gap: 8px;
      align-items: center;
      margin-bottom: 18px;
      color: #dff7f7;
      font-size: 14px;
      font-weight: 750;
      text-transform: uppercase;
    }
    .eyebrow::before {
      content: "";
      width: 34px;
      height: 2px;
      background: var(--accent);
    }
    h1 {
      max-width: 760px;
      margin: 0;
      font-size: clamp(42px, 7vw, 78px);
      line-height: .96;
      letter-spacing: 0;
    }
    .hero p {
      max-width: 650px;
      margin: 24px 0 0;
      color: #edf7f7;
      font-size: clamp(17px, 2vw, 21px);
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 32px;
    }
    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 18px;
      border: 1px solid transparent;
      border-radius: 6px;
      font-weight: 750;
    }
    .button.primary { color: var(--deep); background: var(--accent); }
    .button.secondary { color: var(--white); border-color: rgba(255, 255, 255, .48); }

    section { padding: 78px 0; }
    .section-head {
      display: grid;
      grid-template-columns: minmax(0, 410px) minmax(0, 1fr);
      gap: 44px;
      align-items: end;
      margin-bottom: 34px;
    }
    h2 {
      margin: 0;
      font-size: clamp(30px, 4vw, 48px);
      line-height: 1.06;
      letter-spacing: 0;
    }
    .lead { margin: 0; color: var(--muted); font-size: 18px; }

    .stats {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .stat { padding: 26px 22px; border-right: 1px solid var(--line); }
    .stat:last-child { border-right: 0; }
    .stat strong { display: block; font-size: 34px; line-height: 1; color: var(--brand); }
    .stat span { display: block; margin-top: 8px; color: var(--muted); font-size: 14px; }

    .badges {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      min-height: 36px;
      padding: 0 12px;
      border: 1px solid var(--line);
      border-radius: 6px;
      background: var(--white);
      color: #344054;
      font-size: 14px;
      font-weight: 750;
    }
    .badge.logo-badge { padding: 0 14px; }
    .badge-logo {
      display: block;
      width: 116px;
      height: 24px;
      object-fit: contain;
    }
    .thread-badge-logo { width: 124px; }
    .apple-home-badge-logo {
      width: 150px;
      height: 30px;
    }
    .logo-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      margin: 0 0 24px;
    }
    .cert-logo {
      display: block;
      width: 148px;
      height: 44px;
      object-fit: contain;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 6px;
      padding: 8px 12px;
    }
    .cert-logo.thread-logo { width: 178px; }
    .cert-logo.apple-home-logo { width: 190px; }

    .grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }
    .card {
      min-height: 100%;
      padding: 24px;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 8px;
    }
    .card h3 { margin: 0 0 10px; font-size: 20px; }
    .card p { margin: 0; color: var(--muted); }
    .band { background: var(--panel); }

    .capability {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
      gap: 46px;
      align-items: center;
    }
    .capability > * { min-width: 0; }
    .media {
      overflow: hidden;
      margin: 0;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: #dfe7ec;
    }
    .media img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }
    .check-list {
      display: grid;
      gap: 13px;
      padding: 0;
      margin: 24px 0 0;
      list-style: none;
    }
    .check-list li {
      display: grid;
      grid-template-columns: 26px minmax(0, 1fr);
      gap: 10px;
      color: #344054;
      overflow-wrap: normal;
      word-break: normal;
    }
    .check-list li::before {
      content: "鉁?;
      display: grid;
      place-items: center;
      width: 26px;
      height: 26px;
      color: var(--white);
      background: var(--brand);
      border-radius: 50%;
      font-size: 14px;
      font-weight: 900;
    }

    .rd-flow {
      display: grid;
      grid-template-columns: minmax(180px, .8fr) minmax(220px, 1fr) minmax(180px, .85fr) minmax(190px, .9fr) minmax(180px, .85fr);
      gap: 24px;
      align-items: center;
      margin-top: 34px;
      overflow-x: auto;
      padding-bottom: 6px;
    }
    .rd-stack {
      display: grid;
      gap: 18px;
      padding: 18px;
      border: 1px solid #7aa7df;
      border-radius: 18px;
      background: rgba(255, 255, 255, .5);
    }
    .rd-node {
      position: relative;
      min-height: 74px;
      display: grid;
      place-items: center;
      padding: 14px 18px;
      color: var(--white);
      background: #12263d;
      border: 3px solid #1d3858;
      border-radius: 8px;
      text-align: center;
      font-size: 18px;
      font-weight: 760;
      line-height: 1.25;
    }
    .rd-flow > .rd-node:not(.rd-end)::after,
    .rd-stack::after {
      content: "";
      position: absolute;
      left: calc(100% + 3px);
      top: 50%;
      width: 22px;
      height: 2px;
      background: #4d86d7;
      transform: translateY(-50%);
    }
    .rd-stack { position: relative; }
    .rd-stack::after { left: 100%; }
    .rd-flow > .rd-node:not(.rd-end)::before,
    .rd-stack::before {
      content: "";
      position: absolute;
      left: calc(100% + 22px);
      top: 50%;
      width: 0;
      height: 0;
      border-top: 6px solid transparent;
      border-bottom: 6px solid transparent;
      border-left: 9px solid #4d86d7;
      transform: translateY(-50%);
    }

    .timeline {
      display: grid;
      gap: 18px;
      border-left: 2px solid var(--line);
      margin-left: 9px;
      padding-left: 28px;
    }
    .event { position: relative; }
    .event::before {
      content: "";
      position: absolute;
      left: -38px;
      top: 7px;
      width: 16px;
      height: 16px;
      background: var(--accent);
      border: 3px solid var(--white);
      border-radius: 50%;
      box-shadow: 0 0 0 1px var(--line);
    }
    .event time { color: var(--brand); font-weight: 800; }
    .event h3 { margin: 4px 0 4px; font-size: 20px; }
    .event p { margin: 0; color: var(--muted); }

    .news {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }
    .news article {
      padding: 22px;
      border-top: 3px solid var(--brand);
      background: var(--white);
      border-radius: 0 0 8px 8px;
    }
    .news time { color: var(--muted); font-size: 14px; }
    .news h3 { margin: 9px 0; font-size: 20px; }
    .news p { margin: 0; color: var(--muted); }

    .privacy {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .privacy p { color: var(--muted); }
    .policy-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .contact {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 34px;
      align-items: start;
    }
    .contact-box {
      padding: 28px;
      color: var(--white);
      background: var(--deep);
      border-radius: 8px;
    }
    .contact-box a { color: #e7fcfc; text-decoration: underline; text-underline-offset: 3px; }
    form {
      display: grid;
      gap: 14px;
    }
    label { display: grid; gap: 6px; color: #344054; font-weight: 700; }
    input, textarea {
      width: 100%;
      padding: 12px 13px;
      border: 1px solid #cfd8e3;
      border-radius: 6px;
      font: inherit;
      color: var(--ink);
      background: var(--white);
    }
    textarea { min-height: 132px; resize: vertical; }
    form .button { width: fit-content; border: 0; cursor: pointer; }
    .form-note { margin: 0; color: var(--muted); font-size: 14px; }

    footer {
      padding: 28px 0;
      color: #d8e8ea;
      background: var(--deep);
      font-size: 14px;
    }
    footer .wrap {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
    }

    @media (max-width: 860px) {
      .menu-button {
        display: inline-grid;
        place-items: center;
        width: 42px;
        aspect-ratio: 1;
        border: 1px solid var(--line);
        border-radius: 6px;
        background: var(--white);
      }
      nav {
        position: absolute;
        left: 0;
        right: 0;
        top: 72px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px 20px 20px;
        background: var(--white);
        border-bottom: 1px solid var(--line);
      }
      nav.open { display: flex; }
      .nav-cta { text-align: center; }
      .hero { min-height: 720px; background-position: 62% center; }
      .section-head, .capability, .privacy, .contact { grid-template-columns: 1fr; }
      .stats, .grid, .news, .policy-grid { grid-template-columns: 1fr 1fr; }
      .rd-flow {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .rd-stack { gap: 12px; }
      .rd-flow > .rd-node:not(.rd-end)::after,
      .rd-stack::after,
      .rd-flow > .rd-node:not(.rd-end)::before,
      .rd-stack::before { display: none; }
    }
    @media (max-width: 560px) {
      .wrap { width: min(100% - 28px, 1120px); }
      section { padding: 58px 0; }
      .hero-inner { padding: 78px 0 54px; }
      .stats, .grid, .news, .policy-grid { grid-template-columns: 1fr; }
      .stat { border-right: 0; border-bottom: 1px solid var(--line); }
      .stat:last-child { border-bottom: 0; }
      h1 { font-size: 40px; }
    }