/* 到达顶部/底部按钮样式 */
.scroll-btn {
    position: fixed;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.scroll-to-top {
    bottom: 90px;
}

.scroll-to-bottom {
    bottom: 30px;
}

.scroll-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
    .scroll-btn {
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .scroll-to-top {
        bottom: 80px;
    }
    
    .scroll-to-bottom {
        bottom: 20px;
    }
}