.solution {
    width: 70%;
    margin: 0 auto;
}

.solution_head {
    height: 50px;
    line-height: 50px;
    color: #aaa;
    font-size: 12px;
}

.solution_head a {
    color: #999;
}

.solution_main {
    text-align: center;
}

.solution_main .solution_title {
    font-size: 24px;
    padding: 15px 5px;
    border-bottom: 1px solid #ddd;
    margin-bottom: 30px;
    font-weight: normal;
}

.solution_box {
    width: 900px;
    margin: 0 auto;
}