.banner {
  width: 100%;
  height: 470px;
  display: block;
  overflow: hidden;
  object-fit: cover;
}

.position {
  width: 100%;
  height: 80px;
  border-bottom: 2px solid #999;
  display: flex;
  justify-content: center;
  padding-bottom: 2px;
}
.position .container {
  width: 1400px;
  margin-top: 40px;
  display: flex;
  align-items: center;
  font-size: 28px;
  margin-bottom: 14px;
}
.position .container img {
  width: 32px;
  height: 32px;
  margin-right: 16px;
}
.position .container span {
  color: #999;
  margin-top: 6px;
  font-size: 20px;
}

#content {
  width: 100%;
  min-height: 1000px;
  background-color: #f1faff;
}
#content .container {
  width: 1400px;
  margin: 0 auto;
  padding-top: 20px;
}

/* Side Navigation Styles */
.left {
  width: 250px;
  float: left;
  padding-bottom: 20px;
}

.side-nav {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 4px;
}

.nav-level-top {
  background-color: var(--primary-color);
  display: block;
  color: white;
  text-decoration: none;
  font-size: 14px;
  position: relative;
  cursor: pointer;
  text-align: center;
}

.nav-level-top > div {
  width: 100%;
  height: 80px;
  font-size: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-level-1 {
  list-style: none;
  padding: 0;
  margin: 0;
  background-color: #e3e8e9;
}

.nav-item-1 {
  border-bottom: 1px solid #e5e5e5;
  background-color: #e3e8e9;
}
.nav-item-1.active {
  background-color: #a8dff8;
}

.nav-item-1.active > .nav-level-2 {
  display: block;
}

.nav-item-1:last-child {
  border-bottom: none;
}

.nav-link-1 {
  display: block;
  padding: 20px 20px;
  color: #333;
  text-decoration: none;
  font-size: 20px;
  font-weight: bold;
  text-align: center;
}

.nav-item-1:hover {
  background-color: rgb(168, 223, 248)
}

.nav-level-2 {
  list-style: none;
  padding: 0;
  margin: 0;
  display: none;
}

.nav-item-1:hover > .nav-level-2 {
  display: block;
}

.nav-link-2 {
  display: block;
  padding: 16px 20px 16px 40px;
  color: #666;
  text-decoration: none;
  font-size: 20px;
  position: relative;
  cursor: pointer;
  text-align: center;
  background-color: white;
}

.nav-link-2:hover {
  color:var(--primary-color);
  text-decoration: underline;
}

.nav-level-3 {
  list-style: none;
  padding: 0;
  margin: 0;
  display: none;
}

.nav-level-3.active {
  display: block;
}

.nav-level-3 li a {
  display: block;
  padding: 10px 20px 10px 60px;
  color: #888;
  text-decoration: none;
  font-size: 13px;
}

.nav-level-3 li a:hover {
  color: var(--background-color);
}

.right {
  width: 1120px;
  float: right;
  padding-bottom: 20px;
}

.right .title {
  font-size: 28px;
  color: #0075ae;
  margin-top: 32px;
}
.right .title::before {
  content: '>';
  display: inline-block;
  width: 8px;
  height: 32px;
  margin-right: 10px;
  position: relative;
  right: 8px;
}

/* 通知列表样式 */
.teacher-list {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.teacher-item {
  position: relative;
  width: 100%;
  margin-bottom: 0px;
  border-radius: 4px;
  padding: 40px 0 20px 0;
  box-sizing: border-box;
  border-top: var(--primary-color) 1px solid;
  display: flex;
  align-items: center;
}
.teacher-item:nth-of-type(1) {
  border-top: var(--primary-color) 2px solid;
}
.teacher-item:nth-last-child(1) {
  border-bottom: var(--primary-color) 1px solid;
}
.teacher-item img {
  width: 349px;
  height: 266px;
  object-fit: cover;
}
.teacher-item .content {
  position: relative;
  flex: 1;
  padding-left: 40px;
  height: 266px;
  max-width: 730px;
}

.notice-title {
  display: block;
  width: 100%;
  font-size: 28px;
  color: var(--primary-color);
  margin-bottom: 16px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.notice-content {
  position: relative;
}

.notice-content p {
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #333;
  font-size: 20px;
  height: fit-content;
  max-height: 192px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.notice-more {
  position: absolute;
  right: 0;
  bottom: 0;
  color: var(--primary-color);
  font-size: 20px;
  padding-bottom: 1px;
  border-bottom: var(--primary-color) 1px solid;
}

.notice-more .arrow {
  color: var(--primary-color);
  margin-left: 2px;
}