/* 基础设置 */
body {
  font-family: sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  color: #333;
  background-color: transparent;
}

.page {
  display: flex;
  flex-direction: column;
}

.center {
  display: flex;
  flex-direction: row;
}

/* 左侧分类导航 */
.left {
  width: 200px;
  padding: 40px 20px;
  /* 简单的右侧分割线，无边框感 */
  border-right: 1px solid #eee;
}

.left a,
.left div {
  display: block;
  text-decoration: none;
  padding: 5px 0;
  margin-bottom: 10px;
  color: #666;
}

/* 突出当前分类 */
.left div {
  font-weight: bold;
  color: #000;
}

.left a:hover {
  text-decoration: underline;
}

/* 右侧视频列表 */
.right {
  flex: 1;
  padding: 40px;
  max-width: 800px;
}

/* 每个视频条目的容器 */
.right div {
  margin-bottom: 15px;
  /* 移除所有框和背景 */
  background: none;
  border: none;
}

/* 视频链接样式 */
.right a {
  color: #0056b3;
  text-decoration: none;
  font-size: 1.1rem;
}

.right a:hover {
  text-decoration: underline;
  color: #003d82;
}

/* 响应式设计：手机端 */
@media (max-width: 600px) {
  body {
    flex-direction: column;
  }

  .left {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #eee;
    padding: 20px;
  }

  .right {
    padding: 20px;
  }
}

/* 底部栏微调 */
.bottombar {
  font-size: 0.85rem;
  color: #717171;
  border-top: 1px solid #eee;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bottombar a {
  color: #065fd4;
  text-decoration: none;
}