.announcement-banner {
    position: relative;
    z-index: 900;
    background: #7e0024;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-top: 8px;
    margin-bottom: 8px;
}

.announcement-banner .banner-link {
    display: block;
    max-width: 1400px;
    margin: 0 auto;
}

.announcement-banner .banner-image {
    display: block;
    width: 100%;
    height: 380px;
    object-fit: contain;
    object-position: center;
}

.announcement-banner .banner-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    color: #7e0024;
    font-size: 22px;
    line-height: 36px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.announcement-banner .banner-close:hover {
    background: #ffffff;
}

@media (max-width: 768px) {
    .announcement-banner .banner-image {
        height: 240px;
    }
    .announcement-banner .banner-close {
        top: 6px;
        right: 6px;
        width: 30px;
        height: 30px;
        font-size: 18px;
        line-height: 30px;
    }
}

@media (max-width: 480px) {
    .announcement-banner .banner-image {
        height: 180px;
    }
    .announcement-banner .banner-close {
        width: 28px;
        height: 28px;
        font-size: 16px;
        line-height: 28px;
    }
}