.concat {
    padding-top: 145px;
    padding-bottom: 225px;
	overflow:hidden;
}

.part_1 {
    display: flex;
    margin-bottom: 85px;
    align-items: flex-start;
    justify-content: space-between;
}

.part_1 .right {
    text-align: center;
    font-size: 15px;
    color: #8c8c8c;
}

.part_1 .right img {
    display: block;
    margin: 0 auto 15px;
}

.part_1 .left {
    max-width: 600px;
}

.part_1 .left .b_title {
    margin-bottom: 25px;
    font-size: 43px;
    line-height: 50px;
    font-weight: bold;
    color: var(--themaBlack);
}

.part_1 .left .s_title {
    font-size: 20px;
    line-height: 30px;
    color: #8c8c8c;
}

.mdTitle {
    margin-bottom: 35px;
    font-size: 30px;
    font-weight: bold;
    color: #070708;
    padding-bottom: 30px;
    border-bottom: 1px solid #ececec;
}

.part_2 .twoList > div,
.part_3 .twoList > div {
    display: inline-block;
}

.part_2 .twoList > div:first-child,
.part_3 .twoList > div:first-child {
    max-width: 820px;
    width: 100%;
}

.part_2 .twoList, 
.part_3 .twoList {
    color: #8c8c8c;
    font-size: 16px;
    line-height: 35px;
}

.part_2 {
	clear:both;
    margin-bottom: 130px;
}

.part_3 {
    margin-bottom: 150px;
}

.part_4 .form {
    font-size: 0;
}

.part_4 .form .sub {
	cursor:pointer;
    display: block;
    margin-left: auto;
    margin-right: 0;
    margin-top: 25px;
    width: 135px;
    line-height: 52px;
    font-size: 15px;
    color: white;
    text-align: center;
    background-color: var(--themaBlue);
}

.part_4 .form .item {
    display: inline-block;
    margin-bottom: 25px;
}

.part_4 .form .item {
    width: calc((100% - 240px) / 3);
}

.part_4 .form .item.area {
    width: calc(100% - 540px);
}

.part_4 .form .item:not(:nth-child(3n)) {
    margin-right: 80px;
}

.part_4 .form .item.area {
    margin-right: 0;
    vertical-align: bottom;
}

.part_4 .form .item textarea {
    overflow: hidden;
}

.part_4 .form .item input,
.part_4 .form .item textarea {
    width: 100%;
    border: 0;
    height: 70px;
    font-size: 20px;
    line-height: 70px;
    outline: none;
    resize: none;
    box-sizing: border-box;
    border-bottom: 1px solid #ececec;
	 font-family: "PingFang SC", "Source Han Sans SC", "HanHei SC",
    "Helvetica Neue", Helvetica, "Hiragino Sans GB", "Microsoft YaHei", 黑体,
    Arial, sans-serif;
}

.part_4 .form .item input::placeholder,
.part_4 .form .item textarea::placeholder {
    font-size: 20px;
    font-weight: bold;
    color: var(--themaBlack);
}


@media (max-width:768px) {
.concat{ padding:10% 0 15%;}	
.part_1{ display:block}
.part_1 .right{ text-align:left; display:block; float:left; clear:both; margin:5% 0;}
.part_2,.part_3{ margin-bottom:15%}
}


@media (max-width:640px) {
.part_1 .left .b_title{ font-size:26px;}
.part_1 .left .s_title{ font-size:18px;}
.mdTitle{ font-size:20px; margin-bottom:15px; padding-bottom:15px;}
.part_4 .form .item{ width:100%;}
.part_4 .form .item textarea,.part_4 .form .item.area{ width:100%; height:150px;}
.part_4 .form .item input, .part_4 .form .item textarea{ line-height:50px;}
.part_4 .form .item input{ height:50px;}
.part_4 .form .item input::placeholder,.part_4 .form .item textarea::placeholder { font-size:16px;}
}