/* ===== 通知横幅（位于轮播区内、导航栏下方） ===== */
.announcement-bar {
  position: absolute;
  top: 6rem;
  left: 0;
  right: 0;
  height: 2rem;
  line-height: 2rem;
  background: #f5f0e1;
  z-index: 5;
  overflow: hidden;
}

/* 滚动轨道（含两份相同文本，无缝循环） */
.announcement-track {
  display: flex;
  white-space: nowrap;
  width: fit-content;
  animation: announcement-marquee 25s linear infinite;
}

@keyframes announcement-marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}