.container{
    width: 100%;
    background: #F3F3F3;
    overflow: hidden;
}
.banner{
    width: 100%;
    height: 25.875rem;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

.banner .banner-item{
    width: 100%;
    height: 100%;
    background-image: url(../images/contactUs/banner.png);
    background-position: top center;
    background-size: cover;
    background-repeat: no-repeat;
}

.banner img{
    display: block;
    width: 100%;
    height: 100%;
}

.nav-section{
    width: 100%;
    height: 4rem;
    background: rgba(5, 109, 220, 1);
    position: relative;
}

.nav-section .crumb{
    width: 100%;
    height: 100%;
    padding: 0 1.75rem;
    background: #121A2D;
}

.nav-section .crumb h2{
    font-size: 1rem;
    line-height: 4rem;
    color: #F3F3F3;
    font-weight: 400;
}

.crumb h2 span, .crumb h2 a{
    color: rgba(255, 255, 255, .6);
}

.contact-form{
    position: relative;
    overflow: hidden;
}

.form-title{
    height: 2rem;
    margin: 1.875rem 0;
    font-size: 1.5rem;
    line-height: 2rem;
    font-family: Source Han Sans CN;
    font-weight: 600;
    color: #0D1326;
}

.form-title.section-title{
    color: rgba(13, 19, 38, 1);
    padding-left: 1.25rem;
    position: relative;
}

.section-title::before{
    content: '';
    width: .25rem;
    height: 1.5rem;
    top: .25rem;
    left: 0; 
    border-radius: 0px .25rem .25rem 0px;
    background-color: rgba(230, 33, 41, 1);
    position: absolute;
}

.form-content{
    display: flex;
    flex-direction: column;
    align-items: inherit;
    justify-content: inherit;
}

.content-section{
    overflow: hidden;
}

.contact-form .content-title{
    font-size: .875rem;
    font-family: Source Han Sans CN;
    font-weight: 500;
    color: #0D1326;
    line-height: 1.5rem;
    margin-bottom: .625rem;
    position: relative;
    font-weight: 600;
}

.content-title .tip{
    position: relative;
    top: 0;
    left: .5rem;
    color: rgba(227, 83, 89, 1);
}

.contact-form .content-text{
    font-size: .875rem;
    font-family: Source Han Sans CN;
    font-weight: 500;
    color: rgba(13, 19, 38, .7);
    line-height: 1.5rem;
    font-weight: 400;
}

.form-section{
    overflow: hidden;
}

.form-item{
    display: flex;
    margin-bottom: 1.5rem;
    align-items: center;
    overflow: initial;
}

.form-item .form-box{
    flex: 1;
}

.form-box.last-name{
    margin-left: 1.875rem;
}

.form-input{
    display: block;
    width: 100%;
    height: 2.25rem;
    padding: 0 .625rem;
    font-size: .875rem;
    line-height: 2.25rem;
    border: solid 1px rgba(18, 26, 45, 0.15);
    color: #333;
    background-color: #fff;
    position: relative;
}

.arrow-down{
    width: 2.25rem;
    height: 2.25rem;
    position: absolute;
    right: 0;
    top: 0;
    z-index: 2;
    background: url('../images/common/arrow.png') center no-repeat;
    background-size: 50%;
    transform: rotate(180deg);
    overflow: hidden;
    cursor: pointer;
}

.select-list{
    display: none;
    width: 100%;
    height: 9.375rem;
    position: absolute;
    padding: .375rem 1rem;
    border-radius: .25rem;
    background: #fff;
    bottom: -9.5rem;
    left: 0;
    z-index: 3;
    overflow: auto;
}

.select-list .select-item{
    height: 2rem;
    font-size: 1rem;
    line-height: 2rem;
    color: #333;
    cursor: pointer;
    border-bottom: solid 1px #ddd;
    transition: ease-in .3s;
}

.select-list .select-item:last-of-type{
    border-bottom: none;
}

.select-list .select-item:hover{
    color: rgba(5, 109, 220, 1);
    background-color: #f5f7fa;
}

.input-tip{
    height: 1.125rem;
    margin-top: .5rem;
    font-size: .875rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: rgba(13, 19, 38, .4);
    line-height: 1.125rem;
}

.textarea-input{
    height: 8rem;
}

.btn-box{
    width: 100%;
    text-align: right;
    overflow: hidden;
    margin: 2.25rem 0 3.75rem 0;
}

.btn{
    display: inline-block;
    width: 6.875rem;
    height: 3rem;
    font-size: 1rem;
    line-height: 3rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    text-align: center;
    border: solid 1px rgba(5, 109, 220, 0.15);
    cursor: pointer;
}

.btn.clear-btn{
    background: #FFFFFF;
    color: #056DDC;
}

.btn.submit-btn{
    background: #056DDC;
    color: #fff;
    margin-left: 1rem;
}

.background-mask{
    width: 50%;
    height: 4rem;
    position: absolute;
    top: 0;
    right: 0;
    background: #121A2D;
    z-index: 2;
}

*::-webkit-input-placeholder {
    color: rgba(13, 19, 38, .4);
}

*::-moz-placeholder {
    /* Mozilla Firefox 19+ */
    color: rgba(13, 19, 38, .4);
}

*::-moz-placeholder {
    /* Mozilla Firefox 4 to 18 */
    color: rgba(13, 19, 38, .4);
}

*::-ms-input-placeholder {
    /* Internet Explorer 10-11 */
    color: rgba(13, 19, 38, .4);
}


.contact-main{
    justify-content: space-between;
}

.left-container{
    width: 29.1875rem;
}

.right-container{
    width: 41.875rem;
}

.email-title{
    margin-top: 0;
}

.content-section img{
    display: block;
    margin-top: 1.5rem;
}

#map-section{
    margin-top: 1.5rem; 
    height: 25rem;
}

@media screen and (max-width: 1200px) {
    .nav-section{
        height: 5rem;
    }
    .nav-section .crumb{
        padding: 0 1rem;
    }
    .nav-section .crumb h2{
        font-size: 1.33rem;
        line-height: 5rem;
    }
    .form-content, .form-item{
        flex-direction: column;
        align-items: inherit;
        justify-content: inherit;
    }
    .form-box.last-name{
        margin-left: 0;
        margin-top: 1rem;
    }
    .banner{
        height: 17.25rem;
    }
    .banner .banner-item {
        background-size: auto 100%;
        background-image: url('../images/contactUs/banner_contact.png');
    }
    .background-mask{
        height: 5rem;
    }
    .input-tip{
        height: auto;
    }
    .contact-form .content-title{
        font-size: 1.5rem;
        margin-top: 1rem;
    }
    .contact-form .content-text{
        font-size: 1.1667rem;
    }
    .form-input{
        font-size: 1.1667rem;
    }
    .contact-main{
        flex-direction: column;
    }
    .contact-main .left-container, .contact-main .right-container{
        width: 100%;
    }
    .email-title{
        margin-top: 1.875rem;
    }
    .content-section img{
        width: 100%;
    }
}