.my-a {
    color: rgba(0,0,0,.6);
    text-decoration: none;
}

.my-a:visited {
    color: rgba(0,0,0,.3);
    text-decoration: none;
}

.my-a:hover {
    color: rgba(0,0,0,1);
    text-decoration: underline;
}

p {
    margin-bottom: 0;
}

.text-truncate-row {
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4; /* 定义文本的行数 */
    -webkit-box-orient: vertical;
    text-overflow: ellipsis;
    white-space: normal;
    max-height: 6em; /* 3行行高的高度 */
    line-height: 1.5em;
    position: relative;
}

li.nav-item {
    position: relative;
}
li.nav-item::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: #000;
    transition: width 0.3s ease-out;
}
li.nav-item:hover::after {
    width: 100%;
}

.opa-fade-in {
    animation: fadeInOpa 1s forwards;
    opacity: 0;
}

@keyframes fadeInOpa {
    to {
        opacity: 1;
    }
}