:root {
  color: #1f2524;
  background: #f5f4ef;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: #f5f4ef;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 28px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; }

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: #143c3a;
  color: #fff;
}

.header-link { color: #48615e; font-size: 14px; font-weight: 600; }
.header-link:hover { color: #143c3a; }

main { max-width: 1160px; margin: 0 auto; padding: 38px 28px 64px; }

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  align-items: center;
  gap: 72px;
  min-height: calc(100vh - 156px);
}

.intro-copy { max-width: 580px; }
.eyebrow { margin: 0 0 16px; color: #d45f40; font-size: 14px; font-weight: 700; }
h1 { margin: 0; color: #143c3a; font-size: 58px; line-height: 1.1; letter-spacing: 0; }
.summary { margin: 20px 0 0; color: #54615f; font-size: 19px; line-height: 1.7; }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 34px; }
.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 6px;
  background: #143c3a;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}
.primary-action:hover { background: #235b57; }
.platforms { color: #6a7472; font-size: 14px; }

.video-stage {
  justify-self: center;
  width: min(100%, 390px);
  overflow: hidden;
  border: 8px solid #143c3a;
  border-radius: 18px;
  background: #143c3a;
  box-shadow: 0 20px 42px rgba(20, 60, 58, 0.2);
}
.video-stage video { display: block; width: 100%; aspect-ratio: 9 / 20; background: #111; object-fit: cover; }

.access { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 0; border-top: 1px solid #c9cfca; color: #5d6866; font-size: 14px; }
.access p { margin: 0; }
.access a { color: #143c3a; font-weight: 700; overflow-wrap: anywhere; }

@media (max-width: 760px) {
  .site-header { padding: 18px 20px; }
  main { padding: 28px 20px 40px; }
  .intro { grid-template-columns: 1fr; min-height: auto; gap: 42px; }
  h1 { font-size: 42px; }
  .summary { font-size: 17px; }
  .video-stage { width: min(100%, 340px); }
  .access { align-items: flex-start; flex-direction: column; }
}