/* 常用样式类 */

.flex {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
}

.j_start {
    justify-content: flex-start;
}

.j_center {
    justify-content: center;
}

.j_end {
    justify-content: flex-end;
}

.a_start {
    align-items: flex-start;
}

.a_end {
    align-items: flex-end;
}

.column {
    flex-direction: column;
}


/* 常用样式类end */

header {
    background: url('../img/banner.jpg') center 0 no-repeat;
    height: 375px;
    background-size: cover;
    position: relative;
}

.header_img {
    position: absolute;
    left: 0px;
    right: 0px;
    top: -20px;
    bottom: 0px;
    margin: auto;
    width: 100%;
    z-index: 3;
    max-width: 800px;
}

.go_home {
    position: absolute;
    right: 10px;
    top: 10px;
    color: #fff;
    border: 1px #fff solid;
    border-radius: 5px;
    padding: 5px 10px;
    font-size: 12px;
}

a {
    color: #fff;
    text-decoration: none;
}

a:hover {
    color: #333;
}

.main {
    margin: -120px 0 80px 0;
}

.main_box {
    background-color: white;
    border-radius: 7px;
    border: 1px solid #dcdcdc;
    border-top: 0;
    padding: 0 30px;
    padding-left: 45px;
}

.main_input {
    margin-bottom: 20px;
}

.main_box>div:first-child {
    font-size: 24px;
    font-weight: bold;
    padding: 30px;
    margin-right: -15px;
    margin-left: -15px;
    border-bottom: 1px solid #dcdcdc;
}

.main_input>div {
    margin-bottom: 20px;
}

.main_input:first-child {
    margin-top: 30px;
}

input[type='text'] {
    height: 44px;
    line-height: 44px;
}

.check_box>div {
    margin-bottom: 20px;
}

.tips_red {
    color: #f04f48;
    margin-top: 20px;
}

.form_submit {
    margin-bottom: 50px;
}

@media screen and (max-width: 992px) {
    header {
        height: 300px;
    }
    .main {
        margin-top: -80px;
    }
}

@media screen and (max-width: 713px) {
    header {
        height: 250px;
    }
    .main {
        margin-top: -60px;
    }
}

@media screen and (max-width: 560px) {
    header {
        height: 200px;
    }
    .main {
        margin-top: -40px;
    }
}

@media screen and (max-width: 450px) {
    header {
        height: 150px;
    }
    .main {
        margin-top: -20px;
    }
}