/* 让目录栏链接在鼠标悬停时高亮变色 */
.post-toc a:hover,
.table-of-contents a:hover {
  color: #007bff !important;    /* 变成你喜欢的颜色，比如蓝色 */
  /* text-decoration: underline;   /* 可选，悬停加下划线 */
  /* background: #f0f8ff;          /* 可选，悬停加浅蓝背景 */
  border-radius: 4px;           /* 可选，圆角边框更明显 */
  transition: color 0.15s, background 0.2s;
}
.logo {
  transition: none;
  will-change: transform, filter;
}
.navbar-brand:hover .logo {
  animation: spin-glow 2.2s cubic-bezier(.25,.8,.25,1) !important;
}
@keyframes spin-glow {
  0%   { transform: rotate(0deg) scale(1);   filter: drop-shadow(0 0 0px #03a9f4);}
  20%  { transform: rotate(180deg) scale(1.10); filter: drop-shadow(0 0 16px #e91e63);}
  40%  { transform: rotate(360deg) scale(1.18); filter: drop-shadow(0 0 36px #8bc34a);}
  60%  { transform: rotate(540deg) scale(0.97); filter: drop-shadow(0 0 42px #ffa726);}
  80%  { transform: rotate(650deg) scale(1.09); filter: drop-shadow(0 0 26px #40c4ff);}
  100% { transform: rotate(720deg) scale(1);    filter: drop-shadow(0 0 0px #03a9f4);}
}
.post-toc {
  position: sticky;
  top: 60px;           /* 你已用的悬浮起点 */
  max-height: calc(100vh - 60px); /* 保证不超出可视区 */
  overflow-y: auto;    /* 超出部分可滚动 */
  z-index: 999;
  /* 可选美化（背景、阴影等） */
}