* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding-top: 56px;
    background-color: #f8f9fa;
}

/* 导航栏 */
.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
}

/* 头部横幅 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    margin-bottom: 50px;
}

.hero-title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-image {
    text-align: center;
    opacity: 0.8;
}

.hero-image i {
    color: rgba(255,255,255,0.3);
}

/* 统计区域 */
.stats-section {
    padding: 60px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #333;
    font-weight: bold;
}

.stat-card {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    color: white;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-10px);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 产品区域 */
.products-section {
    padding: 60px 0;
    background: #f8f9fa;
}

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.product-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.product-status {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.status-已上线 {
    background: #28a745;
    color: white;
}

.status-开发中 {
    background: #ffc107;
    color: #333;
}

.product-body {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    color: #667eea;
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.product-name {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 15px;
    color: #333;
}

.product-description {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
    flex: 1;
}

.product-features {
    margin-bottom: 20px;
}

.product-features strong {
    color: #333;
    font-size: 0.9rem;
}

.product-features ul {
    list-style: none;
    padding-left: 0;
    margin-top: 10px;
}

.product-features li {
    padding: 5px 0;
    color: #666;
    font-size: 0.9rem;
}

.product-features li:before {
    content: "✓ ";
    color: #28a745;
    font-weight: bold;
    margin-right: 5px;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 5px;
}

.price-label {
    color: #666;
    font-size: 0.9rem;
}

.price-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
}

.product-date {
    color: #999;
    font-size: 0.85rem;
}

.product-actions {
    display: flex;
    gap: 10px;
}

.product-actions .btn {
    flex: 1;
}

/* 技术栈区域 */
.tech-section {
    padding: 60px 0;
    background: white;
}

.tech-card {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
    height: 100%;
}

.tech-card:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateY(-5px);
}

.tech-card i {
    color: #667eea;
    margin-bottom: 20px;
    transition: color 0.3s ease;
}

.tech-card:hover i {
    color: white;
}

.tech-card h4 {
    margin-bottom: 10px;
    font-weight: bold;
}

.tech-card p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 页脚 */
.footer-section {
    background: #2c3e50;
    color: white;
    padding: 40px 0;
    margin-top: 50px;
}

.footer-section a {
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #667eea !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .product-actions {
        flex-direction: column;
    }
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card {
    animation: fadeIn 0.5s ease;
}