.nav a:first-of-type {
    background-color: #fff;
    color: #333;
}

.nav a:first-of-type:hover {
    background-color: #FF6600;
    color: #fff;
}

.nav a:nth-last-of-type(2) {
    background-color: #FF6600;
    color: #fff;
}

body {
    background-color: #FBFBFB;
}

.banner {
    width: 100%;
    height: 100%;
}

#joinus {
    width: 1200px;
    height: 542px;
    margin: 0 auto;
    margin-top: -188px;
    margin-bottom: 36px;
    background: #fff;
    border-radius: 12px;
    position: relative;
}

.joinus_title {
    font-size: 48px;
    line-height: 64px;
    color: #FF6600;
    position: absolute;
    top: 70px;
    left: 50px;
}

.joinus_en_title {
    font-size: 58px;
    line-height: 67px;
    color: #BCBCBC;
    position: absolute;
    top: 145px;
    left: 50px;
}

.career {
    font-size: 14px;
    line-height: 19px;
    color: #333;
    position: absolute;
    top: 193px;
    right: 50px;
}

.career_option {
    width: 1200px;
    height: 330px;
    position: absolute;
    top: 212px;
}

.career_option ul {
    width: 1098px;
    height: 290px;
    margin: 40px 50px 0 52px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.careerlist_item {
    width: 500px;
    height: 59px;
    margin-bottom: 20px;
    border-bottom: 2px solid #F5F5F5;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.circle {
    margin-left: 2px;
    margin-right: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid #979797
}

.career_chance {
    width: 478px;
    display: flex;
    justify-content: space-between;
    align-content: center
}

.careerlist_item span:first-of-type {
    font-size: 14px;
    line-height: 19px;
    color: #333;
}

.careerlist_item span:last-of-type {
    font-size: 12px;
    line-height: 16px;
    color: #666;
}

.career_introduction {
    width: 1200px;
    height: 572px;
    margin: 0 auto;
    z-index: 999;
    margin-top: -188px;
    margin-bottom: 33px;
    color: #000;
    border-radius: 12px;
    position: relative;
    font-size: 14px;
    line-height: 24px;
    background-color: #fff;
}

.career_content {
    position: absolute;
    top: 60px;
    left: 60px;
}

.cancel {
    position: absolute;
    top: 60px;
    right: 60px;
}

.cancel:hover {
    cursor: pointer;
}

#mask {
    width: 100%;
    height: 100%;
    display: none;
    position: fixed;
    top: 0px;
    filter: alpha(opacity=30);
    background-color: #000;
    z-index: 99;
    left: 0px;
    opacity: 0.3;
    -moz-opacity: 0.3;
}