/* 从flex布局中移除导航栏 - 使用更具体的选择器 */
.desc-section-two .desc-section-two-container .desc-section-two-left {
  position: fixed;
  z-index: 1000;
  transform: none;
  width: 25%;
  min-width: 440px;
  max-width: 520px;
  height: auto;
   min-height: 480px;
  margin: 0;
  padding: 0;
  flex: none;
  order: -1;
  /* 确保完全脱离文档流 */
  float: none;
  clear: none;
  display: block;
  right: calc(75% - 20px); /* 向右移动，靠近中间分割线 */
}

/* 导航栏基础样式 - 位置由JavaScript控制 */
.desc-section-two-left {
  position: fixed;
  z-index: 1000;
  transform: none;
  width: 25%;
  min-width: 440px;
  max-width: 520px;
  height: auto;
  min-height: 480px;
  margin: 0;
  margin-left: 110px;
  padding: 0;
  right: calc(75% - 20px); /* 向右移动，靠近中间分割线 */
}

.desc-left-nav {
  width: 100%;
  height: auto;
   min-height: 480px;
  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;
}

.desc-left-content-item {
  font-size: 14px;
  line-height: 1.3;
  font-family: Arial-BoldMT;
  text-decoration: none; /* 去除下划线 */
  color: #060606; /* 默认颜色 */
  display: block; /* 使链接表现为块级元素 */
  word-wrap: break-word; /* 允许长单词换行 */
  overflow-wrap: break-word; /* 现代浏览器的换行属性 */
}

/* 一级导航标题样式 - 放大一号并加粗 */
.desc-left-content-item:not([href*="content3-"]):not([href*="content4-"]):not([href*="content5-"]) {
  font-size: 16px;
  font-weight: bold;
}
/* 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 */
}

/* 二级标题样式 - 调大一号（如"3.1 Questionnaire"） */
.desc-right-content strong.subtitle {
  font-size: 18px;
  font-weight: bold;
}