.form_mian {
    width: 80%;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    flex-direction: column;
}

.contact_form > form {
    width: 100%;
}

.input_box > input {
    width: 100%;
    outline: none;
    background: #fff;
    border: 0;
    border-radius: 10px;
    padding: 8px;
}

.input_box {
    width: 100%;
    position: relative;
    padding-bottom: 2%;
}

.input_box > span {
    width: 30px;
    position: absolute;
    right: 10px;
    top: 5px;
}

.input_box > textarea {
    width: 100%;
    height: 200px;
    outline: none;
    background: #fff;
    border: 0;
    border-radius: 10px;
    padding: 8px;
}

.input_box > select {
    width: 100%;
    outline: none;
    border: 0;
    border-radius: 10px;
    background-color: #fff;
    padding: 20px;
}

/*清除ie的默认选择框样式清除，隐藏下拉箭头*/
select::-ms-expand {
    display: none;
}

.contact_btn_box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2% 0;
}

.contact_robot_box {
    margin-bottom: 2%;
}

.contact_btn_mian {
    padding-bottom: 5%;
}

.contact_btn {
    font-family: "NotoSans-Medium";
    width: 246px;
    line-height: 25px;
    height: 49px;
    padding: 10px 15px;
    margin: 0 auto;
    border-radius: 50px;
    background: #6fbe53;
    transition: all 1s linear;
    border: 2px solid transparent;
    text-align: center;
    color: #fff;
    display: block;
    font-size: 20px;
    transition: all 1s linear;
}

.back_btn {
    font-family: "NotoSans-Medium";
    width: 246px;
    line-height: 25px;
    height: 49px;
    padding: 10px 15px;
    margin: 0 auto;
    border-radius: 50px;
    border: 2px solid transparent;
    text-align: center;
    color: #fff;
    display: block;
    font-size: 20px;
}
@media (min-width: 1370px) {
    .contact_robot_box > a > img {
        display: block;
        margin: 0 auto;
        margin-left: 34%;
    }
}

/*@media (max-width: 1400px) {
    .contact_robot_box > a > img {
        display: block;
        margin: 0 auto;
        margin-left: 34%;
    }
}*/
@media (max-width: 1140px) {
    .contact_robot_box > a > img {
        margin-left: 32%;
    }
}

@media (max-width: 996px) {
    .contact_robot_box > a > img {
        margin-left: 25%;
    }
}

@media (max-width: 768px) {
    .contact_robot_box > a > img {
        margin-left: 19%;
    }
}

@media (max-width: 625px) {
    .contact_robot_box > a > img {
        margin-left: 12%;
    }
}

@media (max-width: 525px) {
    .contact_robot_box > a > img {
        margin-left: 1%;
    }
}

@media (max-width: 475px) {
    .contact_btn {
        width: 150px;
        font-size: 14px;
    }

    .contact_robot_box > a > img {
        width: 45%;
        margin-left: 15%;
    }
}

@media (max-width: 375px) {
    .contact_robot_box > a > img {
        margin-left: 15%;
    }
}