.nav-two {
    display: flex;
    background-color: #fff;
    border-radius: 8px 8px 0 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    margin-bottom: 25px;}

.nav-item {
    position: relative;
    flex: 1;
    text-align: center;}

a.nav-link {
    display: block;
    padding: 18px 20px;
    text-decoration: none;
    color: #333;
    font-size: 18px;
    font-weight: normal;
    transition: all 0.3s ease;
    border-right: 1px solid #f0f0f0;}

.nav-item:last-child .nav-link {
    border-right: none;}

.nav-link:hover, .nav-link.active {
    background-color: #de142c;
    color: white;}

/* 三级导航 */
.nav-three {
    position: absolute;
    top: 100%;
    left: 0;
    /* min-width: 220px; */
    width: 100%;
    background-color: white;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
    overflow: hidden;}

.nav-item:hover .nav-three {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);}

.nav-three li {
    list-style: none;
    border-bottom: 1px solid #f0f0f0;}

.nav-three li:last-child {
    border-bottom: none;}

.nav-three a {
    display: block;
    padding: 15px 20px;
    color: #333;
    font-size: 16px;
    text-decoration: none;
    font-weight: normal;
    transition: all 0.2s ease;}

.nav-three a:hover {
    background-color: #de142c10;
    color: #de142c;}