.bigpic {
    background: url(../img/bg001.jpg) no-repeat;
    width: 100%;
    height: 0;
    padding-bottom: 50%;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}

h2 {
    text-align: center;
}

h2 span {
    text-decoration: underline #7B9EA8 5px;
}

.diffent table {
    margin-left: auto;
    margin-right: auto;
    border-spacing: 20px;
}

.diffent td{
    width: 400px;
}

.diffent th {
    text-align: center;
}

.diffent tr:nth-child(2) td:nth-child(1) {
    text-align: center;
}

.diffent tr:nth-child(3) {
    text-align: center;
}

.diffent tr:nth-child(3) img {
    width: 300px;
}

.class table {
    margin-left: auto;
    margin-right: auto;
    border-spacing:0px 30px;
}

.class td {
    font-size: 26px;
    border: 1px solid #fff;
}

.class td:nth-child(1) {
    background-color: #7B9EA8;
    width: 200px;
    height: 50px;
    text-align: center;
    opacity: .8;
}

.class td:nth-child(1):hover {
    opacity: 1;
}