* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 12px;
  line-height: 1.4;
  background: #f0f2f5;
  color: #333;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-weight: 400;
}

button {
  cursor: pointer;
  font-family: inherit;
  padding: 0;
  margin: 0;
  border: none;
  background: none;
}

input,
textarea,
select {
  font: inherit;
  padding: 0;
  margin: 0;
  border: 1px solid #d9d9d9;
  border-radius: 4px;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'SF Mono', Monaco, monospace;
  font-size: 11px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 500;
}

h1 { font-size: 18px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; }

p {
  margin: 0;
}

a {
  color: #1890ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}