/* 通知公告页面样式 */
.announcements-header {
    background: linear-gradient(rgba(44, 82, 130, 0.9), rgba(44, 82, 130, 0.7)),
                url('https://images.unsplash.com/photo-1450101499163-c8848c66ca85?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=MnwxfDB8MXxyYW5kb218MHx8YW5ub3VuY2VtZW50fHx8fHx8MTcwOTcxODcyMA&ixlib=rb-4.0.3&q=80&w=1280');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 100px 0 60px;
    text-align: center;
}

.announcements-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.announcements-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 通知筛选 */
.announcements-filter {
    background-color: white;
    padding: 20px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 70px;
    z-index: 10;
}

.filter-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: none;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--secondary-color);
    min-width: 80px;
    text-align: center;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 通知列表 */
.announcements-list {
    padding: 60px 0;
    background-color: var(--background-color);
    min-height: 600px;
}

.announcements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.announcement-card {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.announcement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.announcement-type {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: white;
}

.announcement-type.notice {
    background-color: #4299e1;
}

.announcement-type.announcement {
    background-color: #48bb78;
}

.announcement-type.recruitment {
    background-color: #ed8936;
}

.announcement-title {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.announcement-meta {
    display: flex;
    justify-content: space-between;
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.announcement-content {
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.6;
  //  display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.announcement-link {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.announcement-link:hover {
    background-color: #1a365d;
    transform: translateY(-2px);
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
    flex-wrap: wrap;
    padding: 0 20px;
}

.page-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--secondary-color);
    min-width: 100px;
    font-weight: 500;
}

.page-btn:hover:not(:disabled) {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: #f1f5f9;
}

.page-numbers {
    display: flex;
    gap: 5px;
    align-items: center;
    flex-wrap: wrap;
}

.page-number {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: white;
    color: var(--secondary-color);
    font-weight: 500;
}

.page-number:hover:not(.active) {
    background-color: #f1f5f9;
}

.page-number.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-ellipsis {
    color: var(--secondary-color);
    padding: 0 5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .filter-group {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
    }

    .announcements-grid {
        grid-template-columns: 1fr;
    }

    .pagination {
        flex-direction: column;
        width: 100%;
    }

    .page-btn {
        width: 100%;
        text-align: center;
    }

    .page-numbers {
        order: 2;
        width: 100%;
        justify-content: center;
        margin: 10px 0;
    }

    .prev-btn {
        order: 1;
    }

    .next-btn {
        order: 3;
    }
}