/* 一级导航 - 大号加粗 */
.md-sidebar--primary .md-nav--primary[data-md-level="0"] .md-nav__item > .md-nav__link {
  font-size: 1rem !important;
  font-weight: 600 !important;
}

/* 二级导航 - 小一号 + 缩进 */
.md-sidebar--primary .md-nav--primary[data-md-level="1"] .md-nav__item > .md-nav__link {
  font-size: 0.9rem !important;
  font-weight: 600 !important;
}
.md-sidebar--primary .md-nav--primary .md-nav__item .md-nav {
  padding-left: 1.2rem !important;
}
.md-sidebar--primary .md-nav--primary .md-nav__item .md-nav .md-nav__link {
  font-size: 0.85rem !important;
  font-weight: 400 !important;
}

/* 更深层级 */
.md-sidebar--primary .md-nav--primary .md-nav__item .md-nav .md-nav .md-nav__link {
  font-size: 0.82rem !important;
  font-weight: 300 !important;
}