/* 布局容器：居中、左右留白、不撑满 */
.container {
  max-width: 1200px;
  margin: 25px auto;
  padding: 0 20px;
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: nowrap;
}

/* 左侧内容区 */
.left-section {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* 右侧栏 */
.right-sticky-bar {
  width: 260px;
  flex-shrink: 0;
  position: relative;
  z-index: 90;
}