.return-btn {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    background: #4a90e2;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    width: auto;
    max-width: 200px;
}

.return-btn:hover {
    background: #357abd;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.return-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 - 媒体查询 */
@media screen and (max-width: 768px) {
    /* 平板电脑屏幕 */
    .return-btn {
        font-size: 14px;
        padding: 8px 16px;
    }
}

@media screen and (max-width: 480px) {
    /* 手机屏幕 */
    .return-btn {
        font-size: 14px;
        padding: 8px 16px;
        width: 80%;
        max-width: 180px;
    }
}