:root {
  color: #e8ece8;
  background: #1a1f24;
  font-family: "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(196, 164, 92, .12), transparent 50%),
    #1a1f24;
}

main {
  max-width: 32rem;
  padding: 32px 24px;
  text-align: center;
}

.mark {
  margin: 0 0 18px;
  color: #c4a45c;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 650;
  letter-spacing: .04em;
}

.lead {
  margin: 0;
  color: #9aa39c;
  font-size: 16px;
  line-height: 1.6;
}

.mail {
  margin: 28px 0 0;
  color: #7d8680;
  font-size: 14px;
}

a { color: #e8ece8; }