.material-box .nav {
    clip-path: polygon(20px 0px, 100% 0px, 100% 50px, 0px 50px);
    background-color: #ffffff;
    margin-top:20px;
}
.material-box .select-heard {
    margin: 0 20px;
}
.material-box .select-body {
    background-color: #ffffff;
    padding: 10px 10px 68px;
    position: relative;
    display: flex;
    flex-wrap: wrap;
    margin: 0 20px;
    margin-bottom: 20px;
}

.material-box .nav .nav-item {
    width: 180px;
    cursor: pointer;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    clip-path: polygon(20px 0px, 180px 0px, 160px 50px, 0px 50px);
}

.material-box .nav .nav-item:not(:first-child) {
    margin-left: -20px;
}

.material-box .nav .nav-item:hover {
    background: #494574 !important;
    color: #ffffff;
}

.material-box .nav .nav-item:hover .nav-link {
    color: #ffffff;
}

.material-box .nav-link {
    padding: 0 1rem;
    height: 50px;
    line-height: 50px;
}

.material-box .nav-link:hover {
    border: 0;
}

.material-box .nav .active {
    background: #494574 !important;
}

.material-box .nav .active a {
    color: #ffffff;
}

.c-item {
    padding: 5px 0;
    display: none;
    position: absolute;
    top: 35px;
    left: 10px;
    flex-wrap: wrap;
}

.s-item {
    padding: 5px 0;
    display: none;
    position: absolute;
    top: 35px;
    left: 10px;
    flex-wrap: wrap;
}

.select-body-item {
    display: inline-block;
}

.select-body a {
    padding: 4px 10px;
    cursor: pointer;
}

    .select-body a:hover {
        background: #494574 !important;
        color: #ffffff !important;
        border-radius: 30px;
    }

.select-body .active {
    background: #494574 !important;
    color: #ffffff !important;
    border-radius: 30px;
}