/* 公告区块基础样式 */
.bulletin-section {
    background-color: var(--background-light);
    position: relative;
}

/* 公告标题样式 */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    margin: 1rem auto;
}

/* 公告分类导航 */
.bulletin-nav {
    margin-bottom: 2rem;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.bulletin-nav-item {
    padding: 1rem 1.5rem;
    color: #666;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
    flex: 1;
    border-bottom: 3px solid transparent;
}

.bulletin-nav-item:hover {
    color: var(--accent-color);
    background-color: rgba(52, 152, 219, 0.05);
}

.bulletin-nav-item.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
    background-color: rgba(52, 152, 219, 0.1);
}

/* 公告列表样式 */
/* 3. 公告列表样式 */
.announcement-container {
    margin-top: 2rem;
}

.announcement-list {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.announcement-item {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #eee;
    display: grid;
    grid-template-columns: 100px auto 1fr;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

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

.announcement-item:hover {
    background-color: #f8f9fa;
    transform: translateX(5px);
}

/* 日期样式 */
.announcement-date {
    color: #666;
    font-size: 0.9rem;
    font-weight: 500;
}

/* 标签样式 */
.announcement-tag {
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    min-width: 70px;
    display: inline-block;
}

/* 标签颜色 */
.tag-activity {
    background-color: #0072bc;
    color: white;
}

.tag-important {
    background-color: #dc3545;
    color: white;
}

.tag-update {
    background-color: #b85c1a;
    color: white;
}

.tag-other {
    background-color: #6c757d;
    color: white;
}

.tag-notice {
    background-color: #ffc107;
    color: #000;
}

/* 公告标题样式 */
.announcement-title {
    color: #333;
    text-decoration: none;
    font-size: 0.95rem;
    padding-right: 1.5rem;
    position: relative;
    transition: color 0.3s ease;
}

.announcement-title:hover {
    color: var(--accent-color);
}

.announcement-title::after {
    content: '\f054';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    color: #ccc;
    font-size: 0.8rem;
}

/* 分页样式 */
.pagination {
    margin-top: 2rem;
}

.pagination .page-link {
    border: none;
    color: #666;
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    background-color: var(--accent-color);
    color: white;
}

.pagination .page-item.active .page-link {
    background-color: var(--accent-color);
    color: white;
}

.pagination .page-item.disabled .page-link {
    color: #ccc;
    pointer-events: none;
    background-color: transparent;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .bulletin-section {
        padding-top: 62px;
    }

    .section-title h2 {
        font-size: 1.75rem;
    }

    .bulletin-nav {
        flex-wrap: wrap;
    }

    .bulletin-nav-item {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        flex: 1 1 auto;
    }

    .announcement-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 1rem;
    }

    .announcement-meta {
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .announcement-date {
        font-size: 0.85rem;
    }

    .announcement-tag {
        font-size: 0.8rem;
        padding: 0.2rem 0.75rem;
    }

    .announcement-title {
        padding-right: 1rem;
        font-size: 0.9rem;
    }
}