@charset "UTF-8";
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  background-color: #f1f1f1;
}

em {
  font-style: normal;
}

a {
  text-decoration: none;
  /* 去除下划线 */
  color: inherit;
  /* 继承父元素的颜色 */
  cursor: pointer;
  /* 修改鼠标指针样式 */
  font-size: 16px;
}

ul {
  list-style: none;
}

input {
  border: none;
  outline: none;
  background: transparent;
}

button {
  border: none;
  outline: none;
  background: transparent;
}

.main {
  max-width: 1300px;
  margin: 0 auto;
  margin-top: 20px;
  padding: 30px 25px;
  background-color: #ffffff;
  display: flex;
  align-items: flex-start;
}

.main > .main_nav {
  margin-right: 100px;
}

.main > .main_nav > .main_nav_item {
  margin-top: 30px;
}

.main > .main_nav > .main_nav_item:first-child {
  margin-top: 0;
}

.main > .main_nav > .main_nav_item > .main_nav_item_title {
  font-size: 18px;
  font-weight: bold;
}

.main > .main_nav > .main_nav_item > .main_nav_item_box {
  display: flex;
  flex-direction: column;
  margin-top: 4px;
}

.main > .main_nav > .main_nav_item > .main_nav_item_box > .main_nav_item_box_title {
  font-size: 14px;
  color: #888888;
  margin-top: 22px;
}

.main > .main_nav > .main_nav_item > .main_nav_item_box > .main_nav_item_box_title_active {
  color: #ff4000;
}

.main > .main_content {
  flex: 1;
}