:root {
  color-scheme: light dark;
  --bg: #f7f6f1;
  --panel: rgba(255, 255, 252, 0.9);
  --line: #d9d5c9;
  --text: #171a1f;
  --muted: #69707c;
  --accent: #2b7469;
  --accent-text: #fbfffc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(43, 116, 105, 0.18), transparent 34%),
    linear-gradient(135deg, #fbfaf6 0%, var(--bg) 52%, #eef2ed 100%);
  color: var(--text);
}

main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.panel {
  width: min(560px, 100%);
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(21, 27, 31, 0.12);
  backdrop-filter: blur(18px);
}

.mark {
  color: var(--accent);
  font-weight: 900;
  letter-spacing: 0.08em;
  font-size: 13px;
}

h1 {
  margin: 12px 0;
  font-size: 28px;
  letter-spacing: 0;
}

p {
  color: var(--muted);
  line-height: 1.65;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
}

a,
button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 16px;
  background: rgba(255, 255, 252, 0.86);
  color: var(--text);
  text-decoration: none;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

a {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.note {
  margin-bottom: 0;
  font-size: 13px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121512;
    --panel: rgba(22, 25, 22, 0.9);
    --line: #343b35;
    --text: #f4f2ea;
    --muted: #aeb7aa;
    --accent: #8ad7c6;
    --accent-text: #06110e;
  }

  body {
    background:
      radial-gradient(circle at 18% 12%, rgba(138, 215, 198, 0.16), transparent 34%),
      linear-gradient(135deg, #0b0d0c 0%, var(--bg) 58%, #171a16 100%);
  }

  .panel {
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  }

  a,
  button {
    background: rgba(28, 33, 29, 0.9);
  }

  a {
    background: var(--accent);
  }
}