/* 广告容器基础样式 */
.ad-container {
    margin: 15px 0;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.ad-container:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* 广告图片样式 */
.ad-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.ad-container:hover .ad-image {
    transform: scale(1.02);
}

/* 广告链接样式 */
.ad-link {
    display: block;
    text-decoration: none;
    color: inherit;
    position: relative;
}

.ad-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0);
    transition: background 0.3s ease;
}

.ad-link:hover::after {
    background: rgba(0, 0, 0, 0.05);
}

/* 不同位置的广告样式 */

/* 顶部横幅广告 */
.ad-position-top {
    margin: 20px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #dee2e6;
}

.ad-position-top .ad-image {
    width: 100%;
    height: auto;
    min-height: 80px;
    max-height: none;
    object-fit: contain;
}

/* 侧边栏广告（现在作为独立行显示） */
.ad-position-sidebar {
    margin: 15px auto;
    background: #fff;
    border: 1px solid #dee2e6;
    max-width: 400px;
    text-align: center;
}

.ad-position-sidebar .ad-image {
    max-height: 200px;
}

/* 内容区域广告 */
.ad-position-content {
    margin: 25px 0;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border: 2px solid #e3f2fd;
    border-radius: 12px;
}

.ad-position-content .ad-image {
    max-height: 250px;
}

/* 底部横幅广告 */
.ad-position-bottom {
    margin: 20px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #dee2e6;
}

.ad-position-bottom .ad-image {
    max-height: 120px;
    object-fit: cover;
}

/* 广告标题（悬停时显示） */
.ad-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    padding: 20px 15px 10px;
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.ad-container:hover .ad-title {
    opacity: 1;
}

/* 外链标识 */
.ad-external-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.ad-container:hover .ad-external-icon {
    opacity: 1;
}

/* 加载状态 */
.ad-loading {
    background: #f8f9fa;
    border: 1px dashed #dee2e6;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: #6c757d;
    font-size: 14px;
}

.ad-loading::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid #dee2e6;
    border-top: 2px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 错误状态 */
.ad-error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
    padding: 15px;
    text-align: center;
    font-size: 14px;
    border-radius: 4px;
}

/* 响应式设计 */

/* 平板设备 */
@media (max-width: 992px) {
    .ad-position-top .ad-image,
    .ad-position-bottom .ad-image {
        max-height: 120px;
    }
    
    .ad-position-sidebar .ad-image {
        max-height: 150px;
    }
    
    .ad-position-content .ad-image {
        max-height: 200px;
    }
    
    .ad-title {
        font-size: 13px;
        padding: 15px 10px 8px;
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .ad-container {
        margin: 10px 0;
        border-radius: 6px;
    }
    
    .ad-position-top .ad-image,
    .ad-position-bottom .ad-image {
        max-height: 100px;
    }
    
    .ad-position-sidebar .ad-image {
        max-height: 120px;
    }
    
    .ad-position-content .ad-image {
        max-height: 150px;
    }
    
    .ad-title {
        font-size: 12px;
        padding: 12px 8px 6px;
    }
    
    .ad-external-icon {
        width: 20px;
        height: 20px;
        font-size: 10px;
        top: 8px;
        right: 8px;
    }
}

/* 小屏手机 */
@media (max-width: 576px) {
    .ad-position-top .ad-image,
    .ad-position-bottom .ad-image {
        max-height: 80px;
    }
    
    .ad-position-sidebar .ad-image,
    .ad-position-content .ad-image {
        max-height: 100px;
    }
    
    .ad-container {
        margin: 8px 0;
    }
}

/* 图片加载失败时的样式 */
.ad-image-fallback {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px dashed #dee2e6;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: #6c757d;
    font-size: 14px;
    text-align: center;
    padding: 20px;
}

.ad-image-fallback::before {
    content: '🖼️';
    font-size: 24px;
    margin-bottom: 8px;
    display: block;
}

/* 广告管理后台样式 */
.ads-admin-container {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.ads-admin-header {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    padding: 20px;
    border-bottom: 1px solid #dee2e6;
}

.ads-admin-content {
    padding: 20px;
}

.ad-form-section {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 20px;
}

.ad-preview {
    border: 2px dashed #dee2e6;
    border-radius: 6px;
    padding: 20px;
    text-align: center;
    background: #f8f9fa;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-list-item {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.ad-list-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.ad-list-image {
    width: 100px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid #dee2e6;
}

.ad-status-enabled {
    color: #28a745;
    font-weight: 500;
}

.ad-status-disabled {
    color: #dc3545;
    font-weight: 500;
}

.position-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.position-badge.top {
    background: #e3f2fd;
    color: #1976d2;
}

.position-badge.sidebar {
    background: #f3e5f5;
    color: #7b1fa2;
}

.position-badge.content {
    background: #e8f5e8;
    color: #388e3c;
}

.position-badge.bottom {
    background: #fff3e0;
    color: #f57c00;
}