.desc-left-nav {
  width: 100%;
  height: auto;
  min-height: 542px;
  background-image: url('https://static.igem.wiki/teams/5736/img/desc/p2-left-nav-bg.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}

/* 导航下部 */
.desc-left-nav-down {
  display: flex;
  padding: 20px;
  gap: 25px;
  margin-left: 30px;
  width: calc(100% - 50px);
}


.desc-left-nav-content {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: -50px;
  flex: 1;
  min-width: 0; /* 允许flex项目收缩 */
}