/* 学术主题增强样式 */
:root {
  --academic-blue: #2c3e50;
  --thesis-red: #8b0000;
  --citation-grey: #666;
}

body {
  font-family: 'Georgia', 'Times New Roman', SimSun, serif;
  line-height: 1.8;
  color: var(--academic-blue);
  background: #f8f9fa;
}

h1 {
  font-size: 2.2rem;
  border-bottom: 3px double var(--thesis-red);
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 1.8rem;
  color: var(--thesis-red);
  margin-top: 2rem;
}

blockquote {
  background: #f3f5f7;
  border-left: 4px solid var(--citation-grey);
  padding: 1rem 2rem;
  margin: 1.5rem 0;
  font-style: italic;
}

/* 学术图标装饰 */
h2::before {
  content: "📖";
  margin-right: 0.8rem;
  opacity: 0.8;
}

/* 文献引用样式 */
.reference {
  text-indent: -2em;
  padding-left: 2em;
  color: var(--citation-grey);
  font-size: 0.9em;
}

/* 响应式表格 */
table {
  border-collapse: collapse;
  margin: 2rem 0;
}
th, td {
  border: 1px solid #ddd;
  padding: 0.8rem;
}
th {
  background: var(--academic-blue);
  color: white;
}

/* 移动端优化 */
@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
  .columns {
    flex-direction: column;
  }
  .column {
    width: 100%!important;
  }
}