/* 首页样式 */

/* 欢迎区域 */
.hero-section {
    text-align: center;
    padding: 60px 20px 40px;
}

.hero-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

/* 功能模块网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 28px;
    }
}

/* 功能卡片 */
.feature-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    color: inherit;
}

.feature-card:hover:not(.disabled) {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    fill: white;
}

.feature-icon.quiz {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.feature-icon.exam {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.feature-icon.wrong {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.feature-icon.stats {
    background: linear-gradient(135deg, #10b981, #059669);
}

.feature-content {
    flex: 1;
}

.feature-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.feature-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.coming-soon {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    color: var(--warning);
    background: rgba(245, 158, 11, 0.1);
    border-radius: 20px;
}

.feature-arrow {
    color: var(--text-muted);
    transition: all 0.2s;
}

.feature-arrow svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.feature-card:hover:not(.disabled) .feature-arrow {
    color: var(--primary);
    transform: translateX(4px);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 13px;
}