:root {
  color-scheme: light;
  --bg: #f6fbfb;
  --ink: #162225;
  --muted: #5c6a6e;
  --line: #d7e7e8;
  --card: #ffffff;
  --teal: #079b9a;
  --coral: #f06445;
  --pink: #e86ba7;
  --orange: #ff8a00;
  --yellow: #f1c83c;
  --shadow: 0 18px 42px rgba(13, 45, 51, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.68;
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 12px clamp(16px, 4vw, 56px);
  background: rgba(246, 251, 251, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 238px;
}

.brand img {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(7, 155, 154, 0.25);
}

.brand strong { display: block; font-size: 20px; line-height: 1.1; }
.brand small { display: block; color: var(--muted); font-size: 12px; }

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.top-nav a,
.content-flow a {
  color: #057271;
  font-weight: 700;
}

.top-nav a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,0.78);
  font-size: 14px;
}

.first-screen {
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100vh - 82px);
  margin: 0 auto;
  display: grid;
  align-items: center;
  padding: 24px 0;
}

.hero-copy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.92fr);
  grid-template-areas:
    "eyebrow image"
    "title image"
    "intro image"
    "products products";
  align-items: center;
  gap: 16px 34px;
}

.eyebrow {
  grid-area: eyebrow;
  margin: 0;
  color: var(--coral);
  font-weight: 700;
}

h1 {
  grid-area: title;
  margin: 0;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.08;
  letter-spacing: 0;
}

.product-image {
  grid-area: image;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 630;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.first-paragraph {
  grid-area: intro;
  margin: 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 20px);
}

.product-strip {
  grid-area: products;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.product-card {
  min-height: 88px;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(13, 45, 51, 0.08);
}

.product-card img {
  width: 54px;
  height: 54px;
  object-fit: cover;
  border-radius: 8px;
  background: #edf5f5;
}

.product-card strong,
.product-card small { display: block; }

.product-card small {
  color: var(--muted);
  font-size: 12px;
}

.product-card b {
  color: #fff;
  background: var(--teal);
  border-radius: 8px;
  padding: 6px 9px;
  font-size: 13px;
}

.video-panel,
.content-flow {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto 34px;
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 8px;
  background: #071719;
  box-shadow: var(--shadow);
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.content-flow {
  display: grid;
  gap: 18px;
}

.content-flow section,
.link-network {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(18px, 3vw, 30px);
}

.content-flow h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
}

.content-flow p { margin: 0 0 12px; color: #34484d; }
.content-flow ol { margin: 10px 0 0; padding-left: 22px; }
.content-flow li { margin: 6px 0; }

.cta {
  display: block;
  padding: 14px 16px;
  border-radius: 8px;
  background: #ecfbfa;
  border: 1px solid #b8e7e5;
  color: #075d5c !important;
  font-weight: 700;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  background: #fbffff;
}

details + details { margin-top: 10px; }
summary { cursor: pointer; font-weight: 700; }
details p { margin-top: 8px !important; }

.link-network {
  position: relative;
  display: grid;
  gap: 14px;
  overflow: hidden;
}

.link-network::before {
  content: "";
  position: absolute;
  inset: 28px;
  border: 2px solid rgba(7, 155, 154, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.network-center {
  position: relative;
  z-index: 1;
  width: min(290px, 100%);
  margin: 0 auto 4px;
  display: grid;
  justify-items: center;
  gap: 4px;
  padding: 14px;
  border-radius: 8px;
  color: #fff;
  background: var(--teal);
  box-shadow: 0 12px 24px rgba(7, 155, 154, 0.22);
}

.network-center a { color: #fff; font-size: 21px; }
.network-center small { color: #dffafa; }

.network-group {
  position: relative;
  z-index: 1;
  padding: 0;
  border: 0;
  background: transparent;
}

.network-group h3 {
  margin: 0 0 8px;
  font-size: 15px;
  color: #506369;
}

.network-group div {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.network-group a {
  min-height: 56px;
  display: grid;
  place-items: center;
  gap: 2px;
  padding: 10px;
  border-radius: 8px;
  color: #fff !important;
  text-align: center;
  font-weight: 700;
  border: 1px solid rgba(0,0,0,0.08);
}

.network-group a i {
  color: #0d5e2a;
  font-style: normal;
  font-size: 18px;
  line-height: 1;
}

.network-group.teal a { background: var(--teal); }
.network-group.coral a { background: var(--coral); }
.network-group.pink a { background: var(--pink); }
.network-group.orange a { background: var(--orange); }
.network-group.yellow a { background: var(--yellow); color: #3b2f00 !important; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  padding: 30px clamp(16px, 5vw, 72px);
  color: #f6fbfb;
  background: #102528;
  border-top: 1px solid var(--line);
}

.site-footer p {
  max-width: 640px;
  margin: 6px 0 0;
  color: #cbe4e5;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-content: flex-start;
  gap: 10px;
}

.site-footer a {
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 8px;
  padding: 7px 10px;
  color: #fff;
}

@media (max-width: 980px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav { justify-content: flex-start; }
  .first-screen { min-height: auto; }

  .hero-copy {
    grid-template-columns: 1fr;
    grid-template-areas:
      "eyebrow"
      "title"
      "image"
      "intro"
      "products";
  }

  .product-strip,
  .network-group div { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .brand { min-width: 0; }
  .brand strong { font-size: 18px; }
  .brand small { font-size: 11px; }
  .product-strip,
  .network-group div { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: 48px minmax(0, 1fr) auto; }
  .product-card img { width: 48px; height: 48px; }
  .site-footer { flex-direction: column; }
  .site-footer nav { justify-content: flex-start; }
}