/**
 * 广告位样式
 * 支持横幅、方形、侧边栏等多种广告格式
 */

/* ========== 广告容器基础样式 (Google Ads风格) ========== */
.ad-container {
    margin: 20px 0;
    background: #fefefe;
    border: 1px solid #e8eaed;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.15);
    transition: all 0.2s ease;
    opacity: 0;
    transform: translateY(5px);
}

.ad-container.ad-loaded {
    opacity: 1;
    transform: translateY(0);
}

.ad-container:hover {
    box-shadow: 0 2px 4px rgba(60, 64, 67, 0.2);
    border-color: #dadce0;
}

/* ========== 广告标签 (Google Ads风格) ========== */
.ad-label {
    display: inline-flex;
    align-items: center;
    padding: 2px 6px;
    background: #fef7e0;
    color: #5f6368;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0;
    border-radius: 2px;
    border: 1px solid #fbbc04;
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 10;
}

.ad-label-icon {
    display: none; /* 隐藏图标，更像Google Ads */
}

.ad-label-text {
    text-transform: uppercase;
    font-family: Arial, sans-serif;
}

/* ========== 广告内容区域 (Google Ads风格) ========== */
.ad-content {
    padding: 12px;
    position: relative;
}

.ad-placeholder {
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border: 1px dashed #dadce0;
    border-radius: 2px;
    color: #5f6368;
    font-size: 13px;
    font-family: Arial, 'Helvetica Neue', sans-serif;
    text-align: center;
    padding: 20px 16px;
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
}

.ad-placeholder:hover {
    background: #f8f9fa;
    border-color: #bdc1c6;
}

/* ========== 横幅广告 (Banner - Google Ads风格) ========== */
.ad-banner .ad-content {
    padding: 12px;
}

.ad-banner .ad-placeholder {
    min-height: 90px;
    font-size: 13px;
    background: #ffffff;
    padding: 16px;
}

.ad-banner .ad-placeholder::after {
    display: none; /* 移除emoji，保持简洁 */
}

/* ========== 方形广告 (Square - Google Ads风格) ========== */
.ad-square {
    max-width: 300px;
    margin: 20px auto;
}

.ad-square .ad-placeholder {
    min-height: 250px;
    aspect-ratio: 1;
    font-size: 13px;
    padding: 32px 20px;
    background: #ffffff;
}

.ad-square .ad-placeholder::after {
    display: none; /* 移除emoji，保持简洁 */
}

/* ========== 侧边栏广告 (Sidebar - Google Ads风格) ========== */
.ad-sidebar {
    margin: 0 0 20px 0;
}

.ad-sidebar .ad-content {
    padding: 12px;
}

.ad-sidebar .ad-placeholder {
    min-height: 250px;
    font-size: 13px;
    padding: 24px 16px;
    background: #ffffff;
}

.ad-sidebar .ad-placeholder::after {
    display: none; /* 移除emoji，保持简洁 */
}

/* ========== 首页广告位特定样式 (Google Ads风格) ========== */
.ad-position-index-top {
    margin: 16px 0 24px 0;
}

.ad-position-index-middle {
    margin: 24px 0;
}

.ad-position-index-sidebar {
    position: sticky;
    top: 16px;
}

/* ========== 列表页广告位特定样式 (Google Ads风格) ========== */
.ad-position-list-top {
    margin: 16px 0 24px 0;
}

.ad-position-list-sidebar {
    position: sticky;
    top: 16px;
}

/* ========== 详情页广告位特定样式 (Google Ads风格) ========== */
.ad-position-detail-top {
    margin: 16px 0 24px 0;
}

.ad-position-detail-middle {
    margin: 24px 0;
}

.ad-position-detail-sidebar {
    position: sticky;
    top: 16px;
    margin-bottom: 16px;
}

/* ========== 移动端适配 (Google Ads风格) ========== */
@media (max-width: 768px) {
    .ad-container {
        margin: 12px 0;
        border-radius: 4px;
        box-shadow: 0 1px 2px rgba(60, 64, 67, 0.15);
    }
    
    .ad-label {
        padding: 2px 5px;
        font-size: 10px;
        top: 6px;
        left: 6px;
    }
    
    .ad-content {
        padding: 10px;
    }
    
    .ad-placeholder {
        min-height: 70px;
        font-size: 12px;
        padding: 16px 12px;
    }
    
    .ad-banner .ad-content {
        padding: 10px;
    }
    
    .ad-banner .ad-placeholder {
        min-height: 80px;
        font-size: 12px;
        padding: 12px;
    }
    
    .ad-square {
        max-width: 100%;
        margin: 12px 0;
    }
    
    .ad-square .ad-placeholder {
        min-height: 200px;
        padding: 24px 16px;
    }
    
    .ad-sidebar .ad-content {
        padding: 10px;
    }
    
    .ad-sidebar .ad-placeholder {
        min-height: 160px;
        padding: 20px 12px;
    }
    
    /* 移动端取消sticky定位 */
    .ad-position-index-sidebar,
    .ad-position-list-sidebar,
    .ad-position-detail-sidebar {
        position: static;
        margin: 12px 0;
    }
    
    /* 移动端hover效果禁用 */
    .ad-container:hover {
        box-shadow: 0 1px 2px rgba(60, 64, 67, 0.15);
    }
    
    .ad-placeholder:hover {
        background: #ffffff;
        border-color: #dadce0;
    }
}

/* ========== 暗色模式支持 ========== */
@media (prefers-color-scheme: dark) {
    .ad-container {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
        border-color: #4a5f7f;
    }
    
    .ad-placeholder {
        background: #2c3e50;
        border-color: #4a5f7f;
        color: #a0aec0;
    }
    
    .ad-placeholder:hover {
        background: #34495e;
        border-color: #667eea;
    }
}

/* ========== 动画效果 (Google Ads风格 - 简洁淡入) ========== */
@keyframes adFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ad-container {
    animation: adFadeIn 0.3s ease-out;
}

/* ========== 关闭按钮（可选） ========== */
.ad-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-size: 16px;
    transition: all 0.2s ease;
}

.ad-close:hover {
    background: rgba(0, 0, 0, 0.2);
    color: #333;
}

/* ========== 广告加载骨架屏 ========== */
.ad-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: adSkeleton 1.5s ease-in-out infinite;
}

@keyframes adSkeleton {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}