.smart-ad {
    margin: 20px 0;
    text-align: center;
    overflow: hidden;
}

.smart-ad-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    transition: opacity 0.3s ease;
}

.smart-ad a:hover .smart-ad-image {
    opacity: 0.9;
}

.smart-ad-hero-banner {
    width: 100%;
    max-width: 1200px;
    margin: 20px auto;
    background: #f5f7fa;
    border-radius: 8px;
    overflow: hidden;
}

.smart-ad-hero-banner .smart-ad-image {
    max-height: 250px;
    object-fit: cover;
}

.smart-ad-sidebar-top,
.smart-ad-sidebar-bottom {
    width: 100%;
    max-width: 440px;
    margin: 20px auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
    position: sticky;
    top: 20px;
    z-index: 10;
}

.smart-ad-sidebar-top .smart-ad-image,
.smart-ad-sidebar-bottom .smart-ad-image {
    max-height: 240px;
    object-fit: cover;
}

.smart-ad-in-content {
    width: 100%;
    max-width: 728px;
    margin: 30px auto;
    padding: 10px;
    background: #f5f7fa;
    border-radius: 4px;
}

.smart-ad-in-content .smart-ad-image {
    max-height: 90px;
}

.smart-ad-footer-banner {
    width: 100%;
    max-width: 1200px;
    margin: 20px auto;
    background: #323840;
    border-radius: 8px;
    overflow: hidden;
}

.smart-ad-footer-banner .smart-ad-image {
    max-height: 200px;
    object-fit: cover;
}

@media (max-width: 768px) {
    .smart-ad-hero-banner,
    .smart-ad-footer-banner {
        border-radius: 0;
        margin: 15px 0;
    }

    .smart-ad-hero-banner .smart-ad-image {
        max-height: 150px;
    }

    .smart-ad-sidebar-top,
    .smart-ad-sidebar-bottom {
        max-width: 100%;
        margin: 15px 0;
    }

    .smart-ad-in-content {
        max-width: 100%;
        margin: 20px 0;
        border-radius: 0;
    }

    .smart-ad-in-content .smart-ad-image {
        max-height: 60px;
    }
}

@media (max-width: 480px) {
    .smart-ad {
        margin: 15px 0;
    }

    .smart-ad-hero-banner .smart-ad-image {
        max-height: 100px;
    }

    .smart-ad-sidebar-top .smart-ad-image,
    .smart-ad-sidebar-bottom .smart-ad-image {
        max-height: 180px;
    }
}