/* 字体引用 */
@font-face {
  font-family: 'EduKai';
  src: url('LXGWWenKai-Regular.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

body, input, textarea, button {
  font-family: Arial, sans-serif;
}

.math-container {
  display: grid;
  grid-gap: 12px;
  margin-top: 12px;
}

.math-item {
  padding: 6px 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 20px;
  text-align: center;
}

.header {
  text-align: center;
  font-size: 16px;
  margin-bottom: 8px;
}

.zt-cell {
  font-family: 'EduKai', 'KaiTi', serif;
  font-size: 24px;
  line-height: 1.5;
  display: inline-block;
  text-align: center;
  vertical-align: middle;
}

.zt-container {
  display: grid;
  grid-gap: 6px;
}

.zt-grid-cell {
  width: 48px;
  height: 48px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid #000;
  box-sizing: border-box;
  position: relative;
}