/* ===== 列表页侧边栏公共样式 ===== */

.news-wrap {
    width: 1200px;
    margin: 30px auto;
    display: flex;
    gap: 15px;
    background: #f8f9fa;
    padding: 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.news-sidebar {
    display: flex;
    flex-direction: column;
    width: 140px;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    justify-content: left;
    align-items: center;
}

.sidebar-header {
    background: linear-gradient(135deg, #00abdb, #005ec2);
    width: 100%;
    color: #fff;
    padding: 15px;
    font-size: 19px;
    font-weight: bold;
    text-align: center;
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav .nav-item {
    padding: 0;
    border-bottom: 1px solid #f0f0f0;
}

.sidebar-nav .nav-item:last-child {
    border-bottom: none;
}

.sidebar-nav .nav-link {
    display: block;
    padding: 16px 20px;
    cursor: pointer;
    color: #495057;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 18px;
    position: relative;
}

.sidebar-nav .nav-item.active .nav-link {
    box-shadow: inset 3px 0 0 #fff;
}

.sidebar-nav .nav-link:hover:not(.active) {
    background: #f8f9fa;
    color: #0056b3;
    padding-left: 25px;
}

.content-title {
    font-size: 24px;
    font-weight: bold;
    padding-bottom: 5px;
    border-bottom: 2px solid #0056b3;
    margin-bottom: 10px;
    color: #2c3e50;
    position: relative;
}

.content-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 2px;
    background: #28a745;
}

/* ===== 移动端响应式 ===== */
@media (max-width: 1200px) {
    .news-wrap {
        width: 95%;
        margin: 20px auto;
        flex-direction: column;
        gap: 20px;
    }

    .news-sidebar {
        width: 100%;
    }

    .sidebar-header {
        font-size: 16px;
        padding: 12px 15px;
        position: relative;
        cursor: pointer;
    }

    .sidebar-nav .nav-link {
        font-size: 16px;
        padding: 14px 15px;
    }

    .sidebar-nav {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        width: 100%;
    }

    .news-sidebar.active .sidebar-nav {
        max-height: 500px;
    }

    .sidebar-header::after {
        content: '\25BC';
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        transition: transform 0.3s ease;
        font-size: 12px;
    }

    .news-sidebar.active .sidebar-header::after {
        transform: translateY(-50%) rotate(180deg);
    }

    .content-title {
        font-size: 20px;
    }
}

@media (max-width: 768px) {
    .news-wrap {
        width: 100%;
        margin: 10px;
    }
}