:root {
  /* 宋代书籍质感配色 */
  --md-text-font: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --md-primary-fg-color: #fcfcfc; /* 宣纸白 */
  --md-primary-bg-color: #2c2c2c;
  --md-typeset-color: #2b2b2b; /* 墨黑 */
  --md-typeset-a-color: #bd3124; /* 印泥红 */
  --md-accent-fg-color: #bd3124; /* 强调印章红 */
}

body {
  background-color: #fdfdf9; /* 微微泛黄的米纸底色 */
  line-height: 1.8;
  letter-spacing: 0.05em;
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #fdfdf9;
  --md-text-color: #2b2b2b;
}

/* 隐藏侧边栏的繁杂元素，使其更像一本书 */
.md-nav__title {
  font-weight: bold;
  color: #bd3124; /* 红色目录标头模拟朱批 */
}

.md-header {
  box-shadow: none;
  border-bottom: 1px solid #e0e0e0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 500; /* 宋体不需要太粗的字重，保持秀气 */
  letter-spacing: 0.1em;
}

h1:after {
  content: "";
  display: block;
  width: 2em;
  height: 2px;
  background-color: #bd3124;
  margin-top: 0.5em;
}

/* Giscus comments iframe — match paper aesthetic */
.giscus, .giscus-frame {
  width: 100%;
  margin-top: 1rem;
}

/* GitHub CTA Button styling to match the theme */
.cta-github {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.5rem 1.5rem;
  border: 1px solid #bd3124;
  color: #bd3124;
  text-decoration: none;
  font-family: "Noto Serif SC", serif;
  transition: all 0.3s ease;
}

.cta-github:hover {
  background-color: #bd3124;
  color: #fdfdf9;
}