.main-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}


.pic.a7 {
    width: 100%;
    min-width: 1200px;
    background-repeat: no-repeat;
    height: 168px;
    background-position:center;
    background-size: auto 100%;
    background-color: #01605c;

}

.pic img {

}

.pic-group {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 60px 0;
    width: 1200px;


}
.pic-group a {
    color: #303030;
    text-decoration: none;
}

.pic-group .item {
    width: 386px;
    margin-right: 12px;
    text-align: center;
    line-height: 1.4;
}


.pic-group.big .item {
    width: 380px;
    margin-right: 30px;
    margin-bottom: 30px;
}

.pic-group.big .item img{
    width: 100%;
}

.pic-group.big .item:nth-child(3n) {
    margin-right: 0;
}

.pic-group .item:last-child {
    margin-right: 0;
}


.tab {
    height: 160px;
    background-color: #e6e6e6;
    width: 100%;
    min-width: 1200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.tab .title {
    font-size: 36px;
    font-weight: bold;
    letter-spacing: 6px;
    line-height: 1.5;
}

.tab .sub-title {
    font-size: 14px;
}


.search-block {
    background-color: #01605c;
    width: 100%;
    height: 175px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.search-block .content {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
}

.search-block .slogan {
    color: #fff;
    text-align: right;
    width: 580px;
    padding-right: 20px;
    line-height: 1.5;
}

.search-block .input-content {
    background-color: #fff;
    width: 400px;
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 0 20px;

}

.search-block .input-content input {
    border: none;
    margin: 0;
    outline: 0;
    line-height: 45px;
    height: 45px;
    width: 100%;
}

.search-block .input-content .icon {
    width: 25px;
    height: 25px;
    cursor: pointer;
}