/* 底部社交媒体PNG图标样式 */
.social-png {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.social-png-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    position: relative;
    text-decoration: none;
}

.social-png-item:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.social-png-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.social-png-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 8px;
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 12px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.social-png-item:hover .social-png-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-2px);
}

.qr-png-popup {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 12px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    pointer-events: none;
}

.qr-png-popup::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: white;
}

.social-png-item:hover .qr-png-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-2px);
}

.qr-png-content {
    text-align: center;
}

.qr-png-content img {
    width: 100px;
    height: 100px;
    border-radius: 4px;
    margin-bottom: 8px;
}

.qr-png-label {
    font-size: 11px;
    color: #666;
    white-space: nowrap;
}

/* 各平台品牌色 */
.social-png-item.wechat { background-color: #07C160; }
.social-png-item.weibo { background-color: #E6162D; }
.social-png-item.qq { background-color: #12B7F5; }
.social-png-item.douyin { background-color: #000000; }
.social-png-item.kuaishou { background-color: #FF5A00; }
.social-png-item.linkedin { background-color: #0077B5; }
.social-png-item.twitter { background-color: #000000; }

.social-png-item.wechat:hover { background-color: #06A050; }
.social-png-item.weibo:hover { background-color: #D01027; }
.social-png-item.qq:hover { background-color: #0FA7E5; }
.social-png-item.douyin:hover { background-color: #1A1A1A; }
.social-png-item.kuaishou:hover { background-color: #E55000; }
.social-png-item.linkedin:hover { background-color: #0067A5; }
.social-png-item.twitter:hover { background-color: #1A1A1A; }

/* 响应式设计 */
@media (max-width: 768px) {
    .social-png {
        gap: 8px;
    }
    
    .social-png-item {
        width: 32px;
        height: 32px;
    }
    
    .social-png-icon {
        width: 18px;
        height: 18px;
    }
}