:root {
  --bg: #f4f7fb;
  --panel: rgba(255, 255, 255, 0.94);
  --line: rgba(27, 38, 64, 0.12);
  --text: #1b2640;
  --muted: #677388;
  --primary: #1f6feb;
  --primary-hover: #195dc4;
  --secondary: #eef3fb;
  --shadow-lg: 0 24px 60px rgba(27, 50, 90, 0.14);
  --shadow-md: 0 20px 48px rgba(28, 45, 80, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 24px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
}

a {
  color: inherit;
}

@media (max-width: 520px) {
  body {
    padding: 14px;
  }
}