.announcement-container {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.announcement-visual {
    position: relative;
    margin-bottom: -60px;
    z-index: 2;
}

.image-frame {
    width: 50vw;
    height: 50vh;
    border: 8px solid white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transform: scale(0.8);
}

.announcement-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.announcement-content {
    width: 100%;
    max-width: 800px;
}

.content-card {
    background-color: white;
    border-radius: 16px;
    padding: 80px 40px 40px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
}

.announcement-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid #f1f5f9;
    padding-bottom: 1.5rem;
}

.announcement-title {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 0.8rem;
    line-height: 1.4;
    transform: translateY(20px);
}

.announcement-date {
    display: inline-block;
    font-size: 0.9rem;
    color: #7f8c8d;
    background-color: #f8fafc;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    transform: translateY(20px);
}

.announcement-body p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #34495e;
    margin-bottom: 1.2rem;
    transform: translateY(20px);
}

.announcement-body p:last-child {
    margin-bottom: 0;
}

@media screen and (max-width: 768px) {
    .image-frame {
        width: 50vw;
        height: 25vh;
        margin-bottom: 30px;
    }
}
/* 响应式设计 */
@media (min-width: 769px) {
    .announcement-container {
        flex-direction: row;
        align-items: flex-start;
        gap: 3rem;
    }
    .image-frame {
        width: 25vw;
        height: 50vh;
    }
    .announcement-content {
        width: calc(100% - 250px);
    }
    .content-card {
        padding: 40px;
    }
    .announcement-title {
        font-size: 2.2rem;
    }
}