/* 首页样式 - 白底蓝卡 */

.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: #ffffff;
}

.landing-header {
    text-align: center;
    padding: 4rem 2rem 2rem;
    position: sticky;
    top: 0;
    background: #ffffff;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.landing-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.landing-header h1 i {
    color: #4299e1;
}

.landing-header .subtitle {
    font-size: 1.2rem;
    color: #718096;
    font-weight: 400;
}

.landing-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

/* 功能卡片网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
    color: white;
    padding: 2.5rem 2rem;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.2);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(66, 153, 225, 0.3);
}

.feature-card i {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: white;
}

.feature-card p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

/* 操作按钮 */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.action-buttons .btn {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    border-radius: 12px;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(66, 153, 225, 0.4);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .landing-header {
        padding: 3rem 1rem 1.5rem;
    }
    
    .landing-header h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .landing-header .subtitle {
        font-size: 1rem;
    }
    
    .landing-content {
        padding: 1.5rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 2rem 1.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .action-buttons .btn {
        width: 100%;
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .landing-header h1 {
        font-size: 1.75rem;
    }
    
    .feature-card i {
        font-size: 2.5rem;
    }
    
    .feature-card h3 {
        font-size: 1.25rem;
    }
}