.bn {
    height: 986px;
    margin-bottom: 150px;
}

.serve li {
    display: flex;
    margin-bottom: 24px;
    align-items: center;
    background-color: #efefef;
    justify-content: space-between;
}

.serve li > div {
    width: 50%;    
}

.serve .putImg {}

.serve .putTxt {
    padding: 0 175px;
    box-sizing: border-box;
}

.serve .putTxt .title {
	font-weight:bold;
    font-size: 30px;
    line-height: 25px;
    margin-bottom: 30px;
    color: var(--themaGreen);
}

.serve .putTxt .txt {
    font-size: 17px;
    line-height: 25px;
    color: #595757;
}

.serve .maintain {
    margin: 130px 0;
}

.serve .maintain > .title {
    font-size: 45px;
	font-weight:bold;
    line-height: 50px;
}

.serve .maintain .grey {
    margin-top: 50px;
    padding: 120px 235px ;
    box-sizing: border-box;
    background-color: #efefef;
}

.serve .maintain dt {
    display: flex;
    margin-bottom: 60px;
    font-size: 20px;
    justify-content: space-around;
}

.serve .maintain dt p {
    display: inline-block;
	font-weight:bold;
    color: var(--themaGreen2);
}

.serve .maintain dd {
    margin-bottom: 5px;
    font-size: 20px;
    line-height: 35px;
    color: #8a8989;
    line-height: 35px;
}


@media (max-width:1024px) {
.bn{ height:auto; padding:30% 0; margin-bottom:15%;}
.bn .maxWidth{ position:static;transform:none; font-size:40px; line-height:50px;}
.serve .putTxt{ padding:0 5%;}
}

@media (max-width:768px) {
.bn .maxWidth{font-size:34px; line-height:45px;}
.serve li{ display:block;}
.serve li > div{ width:100%;}
.serve .putTxt{ padding:15% 10%;}
.serve .maintain > .title{ font-size:32px; line-height:40px;}
.serve .maintain{ margin:15% 0}
.serve .maintain .grey{ margin-top:5%; padding:10%;}
.serve .maintain dt p{ width:49%;}
.serve .maintain dt{ display:block; margin-bottom:5%;}
.serve .maintain dd{ font-size:18px;}
}

@media (max-width:640px) {
.bn .maxWidth{font-size:22px; line-height:30px;}
.serve .putTxt .title{ font-size:22px;}
.serve .putTxt .txt{ font-size:15px;}
.serve .maintain > .title{ font-size:26px; line-height:35px;}
.serve .maintain dd{ font-size:15px; line-height:25px;}
.serve .maintain dt{ font-size:16px;}
.serve .maintain dt p{ width:100%; line-height:30px;}
}