/*全局衬线字体*/
.sidebar * {
  font-family: "Times New Roman", Georgia, serif;
}

/*外层布局容器*/
.page-layout {
  display: flex;
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  /*关键：让侧边栏、主内容顶部对齐不拉伸侧边栏高度*/
  align-items: flex-start;
}

/*左侧侧边栏核心样式*/
.sidebar {
  width: 15%;
  flex-shrink: 0;
  background: transparent;
  padding: 18px 14px;
  box-sizing: border-box;
  border: 1px solid #333;
  box-shadow: none;

  /*悬浮滚动核心*/
  position: sticky;
  top: 20px; /*距离顶部20px时悬浮*/
  align-self: flex-start; /*高度跟随内部内容不撑满父容器*/
}

/*报纸标题双层分割线*/
.sidebar-title-block {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  letter-spacing: 1px;
  color: #1a1a1a;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 3px double #222;
}

/*菜单列表*/
.sidebar-menu {
  list-style: none;
  padding: 0;
  margin: 0 0 30px 0;
}
.sidebar-menu li a {
  color: inherit;
  text-decoration: none;
  display: block;
}
.sidebar-menu li {
  padding: 14px 6px;
  border-bottom: 1px dotted #444;
  font-size: 15px;
  color: #2c2c2c;
  cursor: pointer;
  transition: 0.15s ease;
}
/*hover半透明底色*/
.sidebar-menu li:hover {
  background-color: rgba(233, 226, 213, 0.35);
  color: #990000;
  font-weight: 600;
}
/*当前页面激活标记*/
.sidebar-menu li.active {
  border-left: 4px solid #990000;
  padding-left: 10px;
  color: #990000;
  font-weight: 600;
}

/*联系我们区域*/
.sidebar-contact {
  padding: 10px 4px;
  line-height: 1.9;
  font-size: 14px;
  color: #333;
  border-top: 1px solid #222;
  margin-top: 10px;
}
.sidebar-contact p {
  margin: 6px 0;
  /*长字符串强制换行*/
  word-wrap: break-word;
  word-break: break-all;
}

/*右侧主内容*/
.main-content {
  width: 85%;
}

/*手机端：隐藏侧边栏-*/
@media (max-width: 980px) {
  .page-layout {
    flex-direction: column;
  }
  .main-content {
    width: 100%;
  }
  .sidebar {
    display: none;
  }
}