/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    color: white;
    transform: translateY(-3px);
}

/* 懒加载图片 */
.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy.loaded {
    opacity: 1;
}

/* 香烟详情页样式 */
.cigarette-detail-container {
    display: flex;
    flex-wrap: wrap;
}

.detail-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.gallery-preview {
    margin-top: auto;
}

.gallery-thumb {
    height: 80px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-thumb:hover {
    transform: scale(1.1);
}

.price-container {
    display: flex;
    align-items: center;
}

.basic-info p {
    margin-bottom: 0.5rem;
}

@media (max-width: 575.98px) {
    .gallery-thumb {
        height: 60px;
    }
}