/* 说明页面整体容器 */
.explain-wrap {
  display: flex;
  gap: 30px;
  margin-top: 20px;
  position: relative;
}

/* 说明左侧固定导航 */
.explain-left-nav {
  min-width: 180px;
  position: sticky;
  top: 92px;
  align-self: flex-start;
}

.explain-left-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.explain-nav-item {
  padding: 12px 16px;
  border-radius: 6px;
  cursor: pointer;
  color: #b8b8d0;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.explain-nav-item:hover {
  background: rgba(130, 90, 240, 0.18);
  color: #e0d0ff;
}

.explain-nav-item.active {
  background: linear-gradient(135deg, rgba(110, 70, 220, 0.22), rgba(60, 160, 255, 0.12));
  border: 1px solid rgba(140, 100, 255, 0.4);
  color: #d8c8ff;
  box-shadow: 0 0 8px rgba(120, 80, 240, 0.2);
}

/* 说明右侧内容区 */
.explain-content-box {
  flex: 1;
}

.explain-content-block {
  display: none;
}

.explain-content-block.show {
  display: block;
  max-width: 70%;
  margin: 0 auto;
}

/* 写在前面 */
.explain-content-block h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: rgb(200, 150, 150);
  text-align: center;
  margin: 12px;
}

.explain-content-block h4 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #fff;
  margin: 12px;
}

.explain-content-block p {
  font-size: 18px;
  line-height: 1.7;
  margin: 0 auto;
  color: #b8b8d0;
  text-indent: 2em;
}

/* 移动端适配说明页 */
@media screen and (max-width:768px) {
  .explain-wrap {
    flex-direction: column;
  }

  .explain-left-nav {
    position: static;
  }

  .explain-left-nav ul {
    flex-direction: row;
    flex-wrap: wrap;
  }
}