.toc > p {
  margin: 0;
}

.toc > p > a {
  color: var(--black-4);
  text-decoration: none;
  display: inline-block;
  padding: 8px 0;
  padding-left: 12px;
  border-left: 1px solid var(--border-color);
  transition: color 0.2s, border-color 0.2s;
}

.toc > p > a:hover,
.toc > p > a:focus-visible {
  color: var(--black);
  text-decoration: none;
  border-color: var(--black-2);
}

.post-container {
  display: grid;
  grid-template-columns: minmax(0, 800px) 260px;
  gap: 40px;
  position: relative;
}

.post-toc {
  position: sticky;
  top: 100px;
  height: calc(100vh - 140px);
  padding: 20px;
  background: rgba(var(--bg-primary), 0.9);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  overflow-y: auto;
}

.toc-header {
  padding-bottom: 15px;
  border-bottom: 2px solid var(--bg-accent);
  margin-bottom: 15px;
  font-family: 'Orbitron', sans-serif;
  color: var(--text-title);
}

.toc-progress {
  height: 3px;
  background: linear-gradient(90deg, var(--bg-accent) 0%, transparent 100%);
  transition: width 0.3s ease;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .post-container {
    grid-template-columns: 1fr;
  }
  .post-toc {
    display: none; /* 移动端通过右下角悬浮按钮触发 */
  }
}