.only_back{background-image: url(../img/backgroup4.png);background-size: 100% 100%; background-repeat: no-repeat;height: 340px;width: 1000px;}
.first_content{width:inherit;height: 240px;padding-top:60px;}
.main_title{font-size: 3.5rem;font-weight: 300;line-height: 1.2;}
.main_two_title{font-size: 18px; font-weight: 300;display: block;margin-top: 20px;display: block;width: inherit;border-bottom: 1px solid gainsboro;padding-bottom: 30px;color: dimgray;font-family: "微软雅黑";}
.wrapper_container{width:1000px;height: 1240px;}

/*the same of er san si*/

.hire_content{box-shadow: 0px 1px 1px 1px lightgray;box-sizing: border-box;overflow: hidden;margin-top: 40px;}
.hire_content>.hire_head{width: inherit;height: 80px;padding-left: 20px;padding-right: 20px;}
.hire_content>.hire_head>.hire-position{color: rgb(0,166,231);font-size: 24px;font-weight: 900;line-height: 80px;}
.hire_content>.hire_head>.hire-salary{float:right;color: rgb(129,237,210);font-size: 24px;font-weight: 900;line-height: 80px;}
.hire_content>.hire_body{font-size: 16px;line-height: 30px;position:relative;}
.hire_content>.hire_body>.position_need,.hire_content>.hire_body>.duty_need{position: absolute;left: 0px;top: 0px;width: 1000px;padding: 20px;height: inherit;}
.hire_content>.hire_body>.position_need{}
.hire_content>.hire_body>.duty_need{background-color: rgb(48,175,255);display: none;color:white;}
/*第二栏*/
.second_content{width: 1000px;height: 430px;}
.second_content>.hire_body{height: 350px;}
/*第三栏*/
.third_content{width: 1000px;height: 340px;}
.third_content>.hire_body{height: 260px;}
/*第四栏*/
.fourth_content{width: 1000px;height: 280px;}
.fourth_content>.hire_body{height: 200px;}