/* WhatsApp 弹窗基础样式 */
.whatsapp-popup {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 280px; /* 默认宽度 */
    max-width: 90vw; /* 最大不超过视口宽度的90% */
    background: white;
    color: #333;
    border-radius: 12px;
    padding: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    transform: translateY(150%);
    transition: transform 0.3s ease-out, width 0.3s ease;
    font-family: 'Segoe UI', Arial, sans-serif;
    border: 1px solid #e0e0e0;
    overflow: hidden;
}

.whatsapp-popup.show {
    transform: translateY(0);
}

.popup-content {
    position: relative;
    padding: 15px;
}

.popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f0f0f0;
}

.popup-header h3 {
    margin: 0;
    font-size: clamp(14px, 4vw, 16px); /* 响应式字体大小 */
    color: #075E54;
    font-weight: 600;
}

.qr-code-container {
    margin: 10px 0;
    text-align: center;
    padding: 10px;
    background: #f9f9f9;
    border-radius: 8px;
}

.qr-code {
    width: 100%;
    max-width: 180px;
    height: auto;
    aspect-ratio: 1/1; /* 保持正方形比例 */
    border: 1px solid #e0e0e0;
    object-fit: contain;
}

.whatsapp-popup p {
    margin: 15px 0;
    font-size: clamp(12px, 3.5vw, 13px); /* 响应式字体大小 */
    color: #666;
    text-align: center;
}

.whatsapp-button {
    display: block;
    background: #25D366;
    color: white;
    text-align: center;
    padding: 12px 15px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
    margin-top: 10px;
    font-size: clamp(13px, 3.8vw, 15px); /* 响应式字体大小 */
}

.whatsapp-button:hover {
    background: #128C7E;
}

.whatsapp-button i {
    margin-right: 8px;
    font-size: clamp(16px, 4.5vw, 18px); /* 响应式图标大小 */
}

.close-popup {
    font-size: clamp(18px, 5vw, 22px); /* 响应式关闭按钮大小 */
    cursor: pointer;
    color: #888;
    transition: color 0.2s;
    line-height: 1;
}

.close-popup:hover {
    color: #555;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .whatsapp-popup {
        width: 250px;
        bottom: 15px;
        right: 15px;
    }
    
    .qr-code {
        max-width: 160px;
    }
}

@media (max-width: 480px) {
    .whatsapp-popup {
        width: 90vw;
        max-width: 300px;
        bottom: 10px;
        right: 10px;
        left: 10px;
        margin: 0 auto;
    }
    
    .popup-content {
        padding: 12px;
    }
    
    .qr-code {
        max-width: 140px;
    }
    
    .whatsapp-button {
        padding: 10px 12px;
    }
}

/* 添加 Font Awesome 图标库 */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css');