/* 重叠卡片效果 */

/* 卡片容器 */
.overlapping-cards-container {
    position: relative;
    width: 100%;
    height: 400px;
    margin: 50px 0;
    perspective: 1000px;
}

/* 基础卡片样式 */
.overlapping-card {
    position: absolute;
    width: 280px;
    height: 350px;
    background-color: var(--color-background);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.5s ease;
    overflow: hidden;
    cursor: pointer;
    transform-origin: center bottom;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

/* 卡片内容 */
.card-content {
    padding: 20px;
    text-align: center;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.card-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    border-radius: 10px 10px 0 0;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card-title {
    margin: 15px 0 10px;
    color: var(--color-primary);
    font-size: 1.2rem;
}

.card-description {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-button {
    display: inline-block;
    padding: 8px 15px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 5px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

/* 卡片位置 - 5张卡片示例 */
.overlapping-card:nth-child(1) {
    z-index: 5;
    transform: translateX(-50%) rotate(-5deg) translateY(0);
}

.overlapping-card:nth-child(2) {
    z-index: 4;
    transform: translateX(-50%) rotate(-2deg) translateY(20px);
}

.overlapping-card:nth-child(3) {
    z-index: 3;
    transform: translateX(-50%) rotate(0deg) translateY(40px);
}

.overlapping-card:nth-child(4) {
    z-index: 2;
    transform: translateX(-50%) rotate(2deg) translateY(60px);
}

.overlapping-card:nth-child(5) {
    z-index: 1;
    transform: translateX(-50%) rotate(5deg) translateY(80px);
}

/* 悬停效果 */
.overlapping-card:hover {
    transform: translateX(-50%) rotate(0deg) translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

.overlapping-card:hover .card-content {
    opacity: 1;
}

.overlapping-card:hover .card-image img {
    transform: scale(1.1);
}

.overlapping-card:hover .card-button {
    opacity: 1;
    transform: translateY(0);
}

/* 点击效果 */
.overlapping-card.active {
    transform: translateX(-50%) scale(1.1) translateY(-30px);
    z-index: 20;
    box-shadow: 0 30px 50px rgba(0, 0, 0, 0.3);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .overlapping-cards-container {
        height: 450px;
    }
    
    .overlapping-card {
        width: 240px;
        height: 320px;
    }
    
    .overlapping-card:nth-child(n) {
        transform: translateX(-50%) rotate(0) translateY(calc(20px * (n - 1)));
    }
    
    .overlapping-card:hover,
    .overlapping-card.active {
        transform: translateX(-50%) scale(1.05) translateY(-20px);
    }
}

/* 适用于现有卡片类的增强样式 */
.feature-card,
.course-card,
.game-card {
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    transform-origin: center bottom;
}

.feature-card:hover,
.course-card:hover,
.game-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    z-index: 5;
}

/* 卡片堆叠效果 */
.stacked-cards {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.stacked-cards .feature-card,
.stacked-cards .course-card,
.stacked-cards .game-card {
    margin-top: -40px;
    border-radius: 15px;
}

.stacked-cards .feature-card:first-child,
.stacked-cards .course-card:first-child,
.stacked-cards .game-card:first-child {
    margin-top: 0;
}

.stacked-cards .feature-card:hover,
.stacked-cards .course-card:hover,
.stacked-cards .game-card:hover {
    transform: translateY(-20px) scale(1.02);
    z-index: 10;
}