/* 首页样式 */

/* 欢迎区域 */
.welcome-section {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(180deg, rgba(255, 107, 107, 0.05) 0%, transparent 100%);
}

.mascot {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.welcome-title {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.welcome-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* 模块卡片网格 */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    padding-bottom: var(--spacing-xl);
}

.module-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.module-card:active {
    transform: translateY(-4px) scale(0.98);
    box-shadow: var(--shadow-lg);
}

.module-card:active::before {
    transform: scaleX(1);
}

.module-card-wide {
    grid-column: span 2;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
}

.card-title {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.card-badge {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(78, 205, 196, 0.1));
    color: var(--primary-color);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: auto;
}

/* 特定卡片颜色定制 */
.module-card[data-module="story"] .card-icon {
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.module-card[data-module="tomato"]::before {
    background: linear-gradient(90deg, #FF6B6B, #FF8787);
}

.module-card[data-module="tomato"] .card-badge {
    background: rgba(255, 107, 107, 0.15);
}

.module-card[data-module="math"]::before {
    background: linear-gradient(90deg, #4ECDC4, #95E1D3);
}

.module-card[data-module="math"] .card-badge {
    background: rgba(78, 205, 196, 0.15);
    color: var(--secondary-color);
}

.module-card[data-module="pet"]::before {
    background: linear-gradient(90deg, #FFE66D, #FFF176);
}

.module-card[data-module="pet"] .card-badge {
    background: rgba(255, 230, 109, 0.2);
    color: #F39C12;
}

.module-card[data-module="why"]::before {
    background: linear-gradient(90deg, #95E1D3, #4ECDC4);
}

.module-card[data-module="why"] .card-badge {
    background: rgba(149, 225, 211, 0.2);
    color: #16A085;
}

/* 加载骨架屏（可选） */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 响应式调整 */
@media (max-width: 375px) {
    .modules-grid {
        gap: var(--spacing-sm);
    }
    
    .module-card {
        min-height: 140px;
        padding: var(--spacing-md);
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .card-title {
        font-size: 1rem;
    }
    
    .welcome-title {
        font-size: 1.5rem;
    }
    
    .mascot {
        font-size: 3rem;
    }
}

@media (min-width: 768px) {
    .modules-grid {
        grid-template-columns: repeat(3, 1fr);
        padding: var(--spacing-lg);
    }
    
    .module-card-wide {
        grid-column: span 1;
    }
}

/* 触控反馈增强 */
@media (hover: hover) {
    .module-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    
    .module-card:hover::before {
        transform: scaleX(1);
    }
}