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

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

.flex-wrap {
  flex-wrap: wrap;
}
.flex-1 {
  flex: 1;
}

.cursor {
  cursor: pointer;
}

.items-start {
  align-items: start;
  -webkit-align-items: start;
}

.items-center {
  align-items: center;
  -webkit-align-items: center;
}
.items-end {
  align-items: end;
  -webkit-align-items: end;
}

.justify-center {
  justify-content: center;
  -webkit-justify-content: center;
}

.justify-start {
  justify-content: flex-start;
  -webkit-justify-content: flex-start;
}

.justify-between {
  justify-content: space-between;
  -webkit-justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
  -webkit-justify-content: flex-end;
}

/* 修改滚动条的整体宽度 */
::-webkit-scrollbar {
  width: 6px; /* 横向滚动条的高 */
  height: 6px; /* 纵向滚动条的宽 */
}

/* 修改滚动条轨道的颜色和背景 */
::-webkit-scrollbar-track {
  background-color: #f1f1f1;
  border-radius: 10px;
}

/* 修改滚动条滑块的颜色和圆角 */
::-webkit-scrollbar-thumb {
  background-color: #888;
  border-radius: 10px;
}

/* 鼠标悬停时滚动条滑块的颜色 */
::-webkit-scrollbar-thumb:hover {
  background-color: #555;
}

body,
html,
p {
  margin: 0;
  padding: 0;
}

a:active,
a:hover {
  outline: 0;
}

a,
a:visited {
  text-decoration: none;
  background-color: transparent;
}

.header {
  width: 100%;
  height: 72px;
  background: #ffffff;
  box-shadow: 0px 2px 20px 0px rgba(0, 0, 0, 0.08);
}
.nav_box {
  position: relative;
  max-width: 1200px;
  width: 100%;
  height: 100%;
}

.top_logo {
  position: absolute;
  height: 100%;
  left: 0;
  top: 0;
  @media (max-width: 1200px) {
    left: 10px;
  }
}

.nav_item {
  font-size: 18px;
  font-weight: 500;
  line-height: 25px;
  margin: 0 20px;
}
.nav_item > a {
  color: #999999;
}

.nav_item:hover > a {
  color: #217299;
}

.nav_right {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  display: flex;
  align-items: center;
  height: 25px;
  @media (max-width: 1200px) {
    right: 5px;
  }
}
.userinfo {
  font-size: 18px;
  font-weight: 500;
  line-height: 25px;
  color: #999999;
}
.active_nav {
  position: relative;
}
.active_nav::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: #217299;
}
.active_nav > a {
  color: #217299;
}

.page_box {
  max-width: 1200px;
  width: 100%;
  min-height: calc(100vh - 72px);
}

.banner {
  width: 100%;
}

.content {
  margin: 0 100px;
  box-sizing: border-box;
}
.line {
  width: 100%;
  margin: 50px 0 30px;
  border-bottom: 1px dashed #0e41c1;
  position: relative;
}
.line::before {
  content: '';
  position: absolute;
  left: -2.5px;
  top: -2.5px;
  width: 6px;
  height: 6px;
  background: #0e41c1;
  border-radius: 50%;
}
.line::after {
  content: '';
  position: absolute;
  right: -2.5px;
  top: -2.5px;
  width: 6px;
  height: 6px;
  background: #0e41c1;
  border-radius: 50%;
}

.footer {
  width: 100%;
  height: 50px;
  background: #4cd5e7;
  font-size: 13px;
  color: #ffffff;
}

.more,
.mobile_nav {
  display: none;
}

@media (max-width: 1000px) {
  .content {
    margin: 0 10px;
  }
}

@media (max-width: 750px) {
  .header {
    height: 44px;
    position: fixed;
    top: 0;
  }
  .page_box {
    padding-top: 44px;
    min-height: calc(100vh - 44px);
  }
  .nav_item,
  .nav_right {
    display: none;
  }
  .more {
    position: absolute;
    right: 15px;
    top: 0;
    bottom: 0;
    margin: auto;
    display: flex;
    align-items: center;
  }
  .show_more {
    width: 18px;
    height: 18px;
    object-fit: contain;
  }
  .show_close {
    display: none;
    width: 20px;
    height: 20px;
    object-fit: contain;
  }

  .mobile_nav {
    position: fixed;
    top: 44px;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: flex-end;
  }

  .mobile_nav_box {
    width: 120px;
    height: 100%;
    background: #ffffff;
    padding: 15px;
    display: flex;
    flex-direction: column;
  }

  .mobile_nav_item {
    font-size: 14px;
    font-weight: 500;
    line-height: 25px;
    margin-bottom: 15px;
    color: #9e9e9e;
  }

  .active_nav_mob {
    color: #217299;
  }

  .line {
    margin: 15px 0;
  }
}