/* 页眉标题悬停反馈 */
.md-header__topic:hover {
  opacity: 0.7;
  transition: opacity 0.2s;
}

/* 正文标题加粗 */
.md-typeset h1 {
  font-weight: 800 !important;
  color: var(--md-typeset-color) !important; /* 强制对齐正文最亮颜色 */
}

/* 增加正文与页脚之间的留白间距 */
.md-main__inner {
  margin-bottom: 4rem !important;
}

/* --- 2. 页眉交互逻辑 --- */

/* 桌面端页眉返回首页点击区 */
@media screen and (min-width: 76.25em) {
  .md-header__button.md-logo {
    position: relative;
    z-index: 10;
  }
  .md-header__button.md-logo::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 400px;
    height: 100%;
    cursor: pointer;
  }
}

/* 移动端页眉适配：简化逻辑，避免 Z轴 冲突 */
@media screen and (max-width: 76.24em) {
  .md-header__button.md-logo {
    position: relative;
    z-index: 10; /* 仅保留 Logo 层级，确保不被默认元素遮挡 */
  }
}

/* --- 3. 编辑弹窗样式 --- */
/* 编辑弹窗背景遮罩样式 */
dialog::backdrop {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(3px);
}

/* 编辑弹窗主体样式 */
#edit-dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  border: 1px solid var(--md-divider-color);
  outline: none;
  border-radius: 12px;
}

/* 弹窗开启时禁用底层滚动 */
body:has(dialog[open]) {
  overflow: hidden;
}

/* --- 4. 移动端布局适配 --- */
/* 移动端页脚版权与图标居中对齐 */
@media screen and (max-width: 47.9375em) {
  .md-footer-meta__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .md-copyright {
    margin-bottom: 0.5rem;
    margin-right: 0;
  }
  .md-social {
    padding-left: 0;
    margin-left: 0;
    display: flex;
    justify-content: center;
  }
}

/* --- 5. 全局排版与字体优化 --- */
:root {
  /* 调整基础行高，让中文阅读更通透 */
  --md-typeset-line-height: 1.7;
}

.md-typeset {
  /* 优先使用系统原生中文黑体，最后回退到 Roboto */
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif, Roboto;
  /* 微调字间距，防止文字粘连 */
  letter-spacing: 0.01em;
}

/* 专门针对中文标点符号和段落的间距优化 */
.md-typeset p {
  margin-top: 0.8em;
  margin-bottom: 0.8em;
  /* 允许在单词内换行，防止中文长句排版断开 */
  word-break: break-word;
}

/* 代码块字体优化：优先使用等宽字体，并加大行高 */
.md-typeset code,
.md-typeset kbd,
.md-typeset pre {
  font-family: "JetBrains Mono", "Cascadia Code", "Consolas", "Courier New", "Roboto Mono", monospace;
  line-height: 1.5;
}

/* 标题字体权重与间距同步优化 */
.md-typeset :is(h1, h2, h3, h4, h5, h6) {
  letter-spacing: -0.01em;
  font-weight: 700;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* 1. 基础隐藏与容器设置 */
.md-copyright { display: none !important; }
.custom-footer-container { 
  display: flex !important; 
  justify-content: space-between !important; 
  align-items: stretch !important; 
  padding: 1.8rem 0 !important; 
  min-height: 100px;
}

/* 2. 统一颜色与悬停效果协议 [要求一 & 要求五] */
.custom-footer-container, 
.custom-footer-container a, 
.custom-footer-container .md-social__link { 
  color: var(--md-footer-fg-color--light) !important; 
  transition: color 0.25s ease, opacity 0.25s ease; 
  text-decoration: none;
}

/* 统一悬停反馈：亮色切换 [要求一] */
.custom-footer-container a:hover, 
.custom-footer-container .md-social__link:hover { 
  color: var(--md-typeset-a-color) !important; 
  opacity: 1;
}

/* 3. 桌面端排版分层 */
.footer-col { display: flex; flex-direction: column; justify-content: space-between; }
.left-col { align-items: flex-start; }
.right-col { align-items: flex-end; text-align: right; }

.cc-license { font-size: 13.5px; font-weight: 700; line-height: 20px; }
.footer-nav, .group-name { font-size: 11.5px; }
.group-name { font-weight: 700; display: block; }

/* 微调口号：锁定行高，释放 1 像素间距感 */
.slogan { 
  font-size: 9px; 
  line-height: 1; 
  margin-top: 0px; 
} 

/* 4. 桌面端间距管理 [要求二] */
.md-social { 
  margin: 0 !important; 
  padding: 0 !important; 
  display: flex; 
  gap: 15px; 
  height: 20px; 
  align-items: center; 
}
.md-social__link { width: 18px; height: 18px; }
.md-social__link svg { fill: currentColor; }

.brand-group-wrapper { 
  display: flex; 
  flex-direction: column; 
  align-items: center; /* 确保口号相对于字幕组名称居中 */
  gap: 1px; /* 品牌组内紧凑 */ 
  margin-top: 12px; /* 与图标行拉开较大间距 */
}

/* 5. 手机端逻辑：极致间距对称优化 [要求三] */
@media screen and (max-width: 47.9375em) { 
  .custom-footer-container { 
    display: flex !important; 
    flex-direction: column !important; 
    align-items: center !important; 
    gap: 1.25rem !important; 
    padding: 2.2rem 0 !important; 
  } 
  .footer-col { display: contents; } 
  .footer-row-item { 
    margin: 0 !important; 
    line-height: 1.2 !important; 
    display: flex; 
    justify-content: center; 
  } 
  .footer-row-cc { order: 1; } 
  .footer-row-social { order: 2; } 
  .footer-row-nav { order: 3; } 
  .footer-row-brand { order: 4; } 
  /* 品牌组在手机端依然保持为一个紧凑整体 */ 
  .brand-group-wrapper { 
    gap: 2px !important; 
    margin-top: 0 !important; 
  } 
}