/* 首页样式 */
.home-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    text-align: center;
}

.hero-section {
    margin-bottom: 3rem;
    animation: fadeInDown 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(99, 102, 241, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-description {
    max-width: 800px;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0 auto 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 修改为固定4列 */
    gap: 1.5rem; /* 调整间距以适应4列布局 */
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem; /* 调整内边距以适应4列布局 */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(99, 102, 241, 0.1), 
        rgba(139, 92, 246, 0.1), 
        rgba(236, 72, 153, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.feature-icon {
    font-size: 3rem; /* 调整图标大小以适应4列布局 */
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    z-index: 1;
}

.feature-title {
    font-size: 1.5rem; /* 调整标题大小以适应4列布局 */
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.feature-description {
    font-size: 0.9rem; /* 调整描述文字大小以适应4列布局 */
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.feature-card:nth-child(1) .feature-icon {
    color: #667eea;
}

.feature-card:nth-child(2) .feature-icon {
    color: #f093fb;
}

.feature-card:nth-child(3) .feature-icon {
    color: #4facfe;
}

.feature-card:nth-child(4) .feature-icon {
    color: #fa709a;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页脚样式 */
.footer {
    background: var(--sidebar-bg);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    width: 100%;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-link:hover {
    color: var(--primary-color);
}

.footer-divider {
    width: 80%;
    height: 1px;
    background: var(--border-color);
    margin: 1.5rem auto;
}

.footer-copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.footer-icp {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.footer-icp a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-icp a:hover {
    color: var(--primary-color);
}

/* 调整主内容区域，确保页脚始终在底部 */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-wrapper {
    display: flex;
    flex: 1;
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    max-width: 1200px;
    width: 100%;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 2rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 1rem;
    }
}