.flex_center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex_row {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.flex_column {
    display: flex;
    flex-direction: column;
}

.flex_rows {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

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

.flex_row_center {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

.top_nav {
    background-color: #000;
    height: 80px;
    width: 100%;
}

.top_nav .title {
    font-size: 30px;
    color: #d20707;
    margin-left: 30px;
}

.nav_list, ul {
    height: 100%;
}

.nav_list li, .nav_list a {
    width: 180px;
    height: 100%;
    color: #fff;
}

.nav_list .current,.nav_list .current a{
    background-color: #d20707 !important;
    color: #fff !important;
}

.footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 80px;
    background-color: #000;
    color: #fff;
}

.footer a {
    color: #fff;
    margin-left: 10px;
}

.footer p {
    margin-bottom: 10px;
}

.footer .beian2 {
    height: 20px;
    width: 20px;
}