.null {
  width: 100%;
  height: 0.1px;
}
.container {
  background-color: #f6f6f6;
}
.nav {
  width: 100%;
  height: auto;
  margin-top: 20px;
}
.nav .content {
  width: 1200px;
  height: auto;
  margin: 0px auto;
}
.nav .content .item {
  font-family: msyhnomal;
  font-size: 12px;
  color: #858585;
  letter-spacing: 0;
  line-height: 17px;
}
/* select */
.select {
  width: 1200px;
  height: auto;
  margin: 25px auto; 
  padding: 30px 80px 30px 30px;
  background-color: #ffffff;
}
.select_content_item {
  font-family: msyhnomal;
  font-size: 14px;
  color: #333333;
  letter-spacing: 0;
  line-height: 46px;
  display:flex;
  display: -webkit-flex;

}
.select_content_item_title {
  color: #858585;
  width:90px;
  flex:none;
}
.select_content_item_text {
  margin-right: 35px;
  cursor: pointer;
}
.select_content_item_text:link {

}
.select_content_item_text:visited {

}
.select_content_item_text:hover {

}
.select_content_item_text_active {
  color:red;
}
/* .select_content_item3 .select_content_item_text5 {
  color: #ED4248;
}
.select_content_item4 .select_content_item_text2 {
  color: #ED4248;
} */

/* lesson */
.lesson {
  position: relative;
  width: 1200px;
  height: auto;
  background-color: #ffffff;
  margin: 0px auto 30px auto;
  padding: 20px 25px 20px 20px;
  display: flex;
  display: -webkit-flex;
  justify-content: space-between;
  align-items: center;
}
.lesson .lesson_item1 img {
  border-radius: 10px;
}
.lesson:hover{
  box-sizing: border-box;
  box-shadow: 0 2px 10px 0 rgba(0,0,0,0.21);
  border-top: 2px solid #ed4248;
  margin-top:-2px;
}
.lesson:hover .lesson_item3_child3{
  background: #ED4248;
  border: 1px solid #ED4248;
  color: #ffffff;
}
.lesson_item2_child4 a:hover {
  color: #ED4248;
}
.lesson_item1 img{
  width: 248px;
  height: 140px;
}
.lesson_item2 {
  flex: 1;
  margin-left: 12px;
  font-family: msyhnomal;
  font-size: 14px;
  color: #585858;
  line-height: 16px;
}
.lesson_item2 a  {
  font-family: msyhnomal;
  color: #585858;
  letter-spacing: 1px;
  line-height: 16px;
  
}
.lesson_item2 .pos2{
  position: absolute;
  right:0;
  display: inline-block;
  vertical-align: top;
}
.lesson_item2_child{
  position:relative;
}
.lesson_item2_child span {
  line-height: 30px;
}
.lesson_item2_child1 .s1 {
  color: #333333;
  font-size: 16px;
  font-weight: bold;
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
}
.lesson_item2_child2,.lesson_item2_child3,.lesson_item2_child4{
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lesson_item2_child1 .s2 img {
  vertical-align: -12%;
}
.lesson_item2_child1 .s3 {
  color: #ED4248;
  font-size: 16px;
  display: inline-block;
}
.lesson_item3 {
  width: 345px;
  height: 120px;
  display:flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-end;
}
.lesson_item2_child2 .s1,.lesson_item2_child3 .s1,.lesson_item2_child3 .s3,.lesson_item2_child4 .s1 {
  color: #858585;
}
.lesson_item2_child4 .s2,.lesson_item2_child4 .s3,.lesson_item2_child4 .s4,.lesson_item2_child4 .s5,.lesson_item2_child4 .s6 {
  margin-right: 15px;
}
.lesson_item3_child1,.lesson_item3_child2,.lesson_item3_child3 {
  text-align: right;
  /* margin-bottom: 8px; */
}
.lesson_item3_child1 em{
  font-style: normal;
}
.lesson_item3_child1 .s1 .em1 {
  font-family: msyhnomal;
  font-size: 18px;
  color: #ED4248;
  letter-spacing: 0;
  line-height: 28px;
}
.lesson_item3_child1 .s1 .em2 {
  font-family: msyhnomal;
  font-size: 28px;
  color: #ED4248;
  letter-spacing: 0;
  line-height: 28px;
}
.lesson_item3_child1 .s2 .em2 {
  text-decoration: line-through;
}
.lesson_item3_child1 .s2 {
  font-family: msyhnomal;
  font-size: 14px;
  color: #A9A9A9;
  letter-spacing: 0;
  line-height: 14px;
  display:none;
}
.lesson_item3_child2 .s1 {
  font-family: msyhnomal;
  font-size: 14px;
  color: #585858;
  letter-spacing: 0;
  line-height: 14px;
}

.lesson_item3_child3 {
  width: 156px;
  height: 34px;
  background: #ffffff;
  border: 1px solid #ED4248;
  border-radius: 17px;
  font-family: msyhnomal;
  font-size: 16px;
  color: #ED4248;
  text-align: center;
  line-height: 34px;
  margin-left: 86px;
}
.lesson_item3_child2,.lesson_item3_child3 {
  margin-top: 23px;
}
/* page */
.pagebox{
  height:60px;
}
.page {
  width: 1200px;
  margin: 0px auto;
  display: flex;
  display: -webkit-flex;
  justify-content: center;

}
.page_item {
  padding: 5px 12px;
  border: 1px solid #979797;
  margin: 3px;
}
.page_item:active {
  background-color: #ed4248;
}

/* xkzx空白页面 */
.nullxkzx {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}
.nullxkzx_filltop {
  width: 100%;
  height: 0.001px;
}
.nullxkzx_content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.nullxkzx_img {
  width: 338px;
  height: 236px;
}
.nullxkzx_text1 {
  display: block;
  font-size: 18px;
  color: #323232;
  letter-spacing: 1.8px;
  margin-top: 40px;
  margin-bottom: 85px;
}

.nullxkzx_text2 {
  margin-top: 20px;
  font-size: 18px;
  color: #ED4248;
  letter-spacing: 1.16px;
}
.line_hr {
  width: 1px;
  height: 24px;
  position: absolute;
  top: 44px;
  left: 243px;
  background-color: #D0D0D0;
}

/* 限时秒杀 */
.countdown_box_wraper {
    position: absolute;
    left: 0px;
    top: 0px;
    height: 35px;
    width: 332px;
}

.countdown_box {
    display: none;
    width: 332px;
    height: 26px;
    padding: 0px 45px 0px 10px;
    margin-bottom: 10px;
    background-image: url('../img/activiBg-051a517864.png');
    background-position: left top;
    background-size: 100% 100%;

    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: space-between;
    -moz-justify-content: space-between;
    -ms-justify-content: space-between;
    -o-justify-content: space-between;
    justify-content: space-between;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
  }
  .countdown_box .box_con {
    width: 100%;
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: space-between;
    -moz-justify-content: space-between;
    -ms-justify-content: space-between;
    -o-justify-content: space-between;
    justify-content: space-between;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
  }
  .countdown_box .box_con.left {
    width: 116px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    
  }
  .countdown_box .box_con .left .name {
    font-size: 16px;
    color: #ffffff;
  }
  .countdown_box .box_con .right {
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: flex-end;
    -moz-justify-content: flex-end;
    -ms-justify-content: flex-end;
    -o-justify-content: flex-end;
    justify-content: flex-end;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
  
  }
  .countdown_box .box_con .right .words {
    font-size: 14px;
    color: #ffffff;
  
  }
  .countdown_box .box_con .right .time {
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: flex-end;
    -moz-justify-content: flex-end;
    -ms-justify-content: flex-end;
    -o-justify-content: flex-end;
    justify-content: flex-end;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
    
  
  }
  .countdown_box .box_con .right .time span {
    display: block;
    width: 20px;
    height: 20px;
    margin: 0px 3px;
    background-color: #ffffff;
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
    line-height: 20px;
    color: rgb(242, 63, 69)
    ;
  }
  .countdown_box .box_con .right .time i {
    font-size: 14px;
    color: #ffffff;
  }

  .countdown_box2 {
    display: none;
    width: 332px;
    height: 26px;
    padding: 0px 45px 0px 10px;
    margin-bottom: 10px;
    background-image: url('../img/activiBg-051a517864.png');
    background-position: left top;
    background-size: 100% 100%;
    background-repeat: no-repeat;display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: space-between;
    -moz-justify-content: space-between;
    -ms-justify-content: space-between;
    -o-justify-content: space-between;
    justify-content: space-between;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
  }
  .countdown_box2 .box_con {
    width: 100%;
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: space-between;
    -moz-justify-content: space-between;
    -ms-justify-content: space-between;
    -o-justify-content: space-between;
    justify-content: space-between;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
    
  }
  .countdown_box2 .box_con .left {
    width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    
  }
  .countdown_box2 .box_con .left .name {
    font-size: 16px;
    color: #ffffff;
  }
  .countdown_box2 .box_con .right {
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: flex-end;
    -moz-justify-content: flex-end;
    -ms-justify-content: flex-end;
    -o-justify-content: flex-end;
    justify-content: flex-end;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
  
  }
  .countdown_box2 .box_con .right .words {
    font-size: 14px;
    color: #ffffff;
  
  }
  .countdown_box2 .box_con .right .time {
    display: -ms-flexbox;
    display: -webkit-box;
    display: -webkit-flex;
    display: box;
    display: flexbox;
    display: flex;
    -webkit-flex-wrap: nowrap;
    -moz-flex-wrap: nowrap;
    -ms-flex-wrap: nowrap;
    -o-flex-wrap: nowrap;
    flex-wrap: nowrap;
    -webkit-flex-direction: row;
    -moz-flex-direction: row;
    -ms-flex-direction: row;
    -o-flex-direction: row;
    flex-direction: row;
    -webkit-justify-content: flex-end;
    -moz-justify-content: flex-end;
    -ms-justify-content: flex-end;
    -o-justify-content: flex-end;
    justify-content: flex-end;
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
    
  
  }
  .countdown_box2 .box_con .right .time span {
    font-size: 14px;
    display: block;
    color: #ffffff;
  }