.back-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 15px 25px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    background-color: #3498db;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
    font-family: "KaiTi", 楷体, serif;
}

.back-button::before {
    content: "🏠";
    font-size: 18px;
}

.back-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.5);
    background-color: #2980b9;
}

.back-button:active {
    transform: translateY(0px);
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
    background-color: #3498db;
}

/* 返回按钮响应式设计 */
@media screen and (max-width: 768px) {
    .back-button {
        bottom: 20px;
        right: 20px;
        padding: 12px 20px;
        font-size: 14px;
    }

    .back-button::before {
        font-size: 16px;
    }
}

@media screen and (max-width: 480px) {
    .back-button {
        bottom: 15px;
        right: 15px;
        padding: 10px 18px;
        font-size: 13px;
    }

    .back-button::before {
        font-size: 14px;
    }
}