/* 顶部标签导航 */
.header-tabs {
    display: flex;
    background-color: #7f1cf1;
    justify-content: center;
    padding: 0;
}

.header-tab {
    flex: 1;
    max-width: 150px;
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.header-tab:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
}

.header-tab.active {
    color: #fff;
    border-bottom-color: #fff;
    font-weight: bold;
}