/* 弹窗样式 */
.side {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    display: none;
    opacity: 0;
    transition: all 0.3s ease;
}

.side.active {
    display: block;
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* 输入区样式 */
.input-area {
    position: relative;
    z-index: 1;
}

/* 充值按钮样式 */
.recharge-btn {
    display: inline-block;
    padding: 10px 20px;
    margin: 5px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.recharge-btn:hover {
    background-color: #45a049;
}