/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    background-image: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, #003366 0%, #0066cc 100%);
    color: #fff;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
}

/* 导航样式 */
nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #ffcc00;
}

/* 下载按钮样式 */
.download-btn {
    display: inline-block;
    background: linear-gradient(135deg, #ff6600 0%, #ff9900 100%);
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, #003366 0%, #0066cc 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 主要内容区域 */
.main-content {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    color: #003366;
    font-size: 28px;
}

/* 卡片样式 */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.card {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    color: #003366;
    margin-bottom: 15px;
    font-size: 20px;
}

/* 新闻列表样式 */
.news-list {
    margin-top: 40px;
}

.news-item {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.news-item:hover {
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.news-item h3 {
    color: #003366;
    margin-bottom: 10px;
}

.news-item p {
    margin-bottom: 15px;
    color: #666;
}

.news-meta {
    font-size: 14px;
    color: #999;
}

.news-item a {
    color: #0066cc;
    text-decoration: none;
    font-weight: 500;
}

.news-item a:hover {
    color: #003366;
}

/* 面包屑导航 */
.breadcrumb {
    background: #f8f9fa;
    padding: 15px 0;
    font-size: 14px;
}

.breadcrumb a {
    color: #0066cc;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #003366;
}

.breadcrumb span {
    color: #666;
    margin: 0 5px;
}

/* 关于页面样式 */
.about-content {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.about-content h2 {
    color: #003366;
    margin-bottom: 20px;
}

.about-content p {
    margin-bottom: 20px;
    line-height: 1.8;
}

/* 产品页面样式 */
.product-features {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.feature-item {
    margin-bottom: 30px;
}

.feature-item h3 {
    color: #003366;
    margin-bottom: 10px;
}

/* 联系页面样式 */
.contact-form {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.submit-btn {
    background: linear-gradient(135deg, #003366 0%, #0066cc 100%);
    color: #fff;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background: linear-gradient(135deg, #002244 0%, #004488 100%);
    transform: translateY(-2px);
}

.contact-info {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-info h3 {
    color: #003366;
    margin-bottom: 20px;
}

.contact-info p {
    margin-bottom: 10px;
}

/* 页脚样式 */
footer {
    background: #003366;
    color: #fff;
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-column h3 {
    margin-bottom: 20px;
    color: #ffcc00;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: #ffcc00;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid #004488;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    nav ul {
        margin-top: 20px;
        justify-content: center;
    }
    
    nav ul li {
        margin: 0 15px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 200px;
        text-align: center;
    }
    
    .card-container {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .product-features,
    .contact-form,
    .contact-info {
        padding: 20px;
    }
}

/* 新闻详情页面样式 */
.news-detail {
    background: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.news-detail h1 {
    color: #003366;
    margin-bottom: 20px;
    font-size: 28px;
}

.news-detail-meta {
    font-size: 14px;
    color: #999;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.news-detail-content {
    line-height: 1.8;
}

.news-detail-content p {
    margin-bottom: 20px;
}

/* 辅助类 */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* 按钮样式增强 */
.primary-btn {
    background: linear-gradient(135deg, #003366 0%, #0066cc 100%);
    color: #fff;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.primary-btn:hover {
    background: linear-gradient(135deg, #002244 0%, #004488 100%);
    transform: translateY(-2px);
}

.secondary-btn {
    background: linear-gradient(135deg, #ff6600 0%, #ff9900 100%);
    color: #fff;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.secondary-btn:hover {
    background: linear-gradient(135deg, #cc5500 0%, #cc7700 100%);
    transform: translateY(-2px);
}