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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.header {
    background: linear-gradient(135deg, #0052ff 0%, #0044cc 100%);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    display: flex;
    align-items: center;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    color: #0052ff;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: #fff;
    font-size: 16px;
    padding: 8px 0;
    position: relative;
    transition: opacity 0.3s;
}

.nav a:hover {
    opacity: 0.8;
}

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

.btn {
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
}

.btn-register {
    background: #ff6b00;
    color: #fff;
}

.btn-register:hover {
    background: #e65a00;
}

.btn-download {
    background: #28a745;
    color: #fff;
}

.btn-download:hover {
    background: #218838;
}

.banner {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTAwIiBoZWlnaHQ9IjEwMCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48ZyBmaWxsPSJub25lIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiPjxwYXRoIGQ9Ik0wIDBoMTAwdjEwMEwwIDBaIiBzdHJva2U9IiNmZmYiIHN0cm9rZS1vcGFjaXR5PSIwLjA1IiBzdHJva2Utd2lkdGg9IjEiLz48L2c+PC9zdmc+');
    opacity: 0.3;
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner h1 {
    font-size: 48px;
    color: #fff;
    margin-bottom: 20px;
    font-weight: 700;
}

.banner p {
    font-size: 20px;
    color: #ccc;
    margin-bottom: 30px;
}

.banner-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.banner .btn {
    padding: 15px 40px;
    font-size: 18px;
}

.features {
    padding: 60px 0;
    background: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: #f8f9fa;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #e9ecef;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #0052ff 0%, #0044cc 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    color: #fff;
}

.feature-card h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    line-height: 1.8;
}

.main {
    min-height: calc(100vh - 200px);
    padding: 40px 0;
}

.breadcrumb {
    padding: 15px 0;
    color: #666;
    font-size: 14px;
    margin-bottom: 20px;
}

.breadcrumb a {
    color: #0052ff;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.page-title {
    font-size: 36px;
    color: #1a1a2e;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #0052ff;
}

.content-section {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.content-section h2 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.content-section h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin: 30px 0 15px;
}

.content-section p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 15px;
}

.content-section ul {
    margin: 15px 0;
    padding-left: 20px;
}

.content-section li {
    color: #555;
    line-height: 2;
    position: relative;
    padding-left: 15px;
}

.content-section li::before {
    content: '•';
    color: #0052ff;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #0052ff 0%, #0044cc 100%);
    border-radius: 10px;
    color: #fff;
}

.stat-item h3 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 16px;
    opacity: 0.9;
    color: #fff;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 16px;
    color: #333;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0052ff;
}

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

.submit-btn {
    background: linear-gradient(135deg, #0052ff 0%, #0044cc 100%);
    color: #fff;
    padding: 15px 40px;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.submit-btn:hover {
    opacity: 0.9;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.contact-item {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
}

.contact-item h4 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.contact-item p {
    color: #666;
    line-height: 1.8;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.news-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-content p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    color: #999;
    font-size: 13px;
}

.news-detail .news-content {
    padding: 40px;
}

.news-detail .news-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.news-detail .news-image {
    height: 400px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 10px;
    padding: 40px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #e9ecef;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.product-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #0052ff 0%, #0044cc 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    font-size: 36px;
    color: #fff;
}

.product-card h3 {
    font-size: 24px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.product-card p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.product-features li {
    color: #555;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.product-features li::before {
    content: '✓';
    color: #28a745;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.sitemap-content {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
}

.sitemap-content h1 {
    font-size: 36px;
    color: #1a1a2e;
    margin-bottom: 30px;
}

.sitemap-section {
    margin-bottom: 30px;
}

.sitemap-section h2 {
    font-size: 24px;
    color: #0052ff;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e9ecef;
}

.sitemap-section ul {
    padding-left: 0;
}

.sitemap-section li {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
}

.sitemap-section a {
    color: #333;
    font-size: 16px;
    transition: color 0.3s;
}

.sitemap-section a:hover {
    color: #0052ff;
}

.sitemap-section a::before {
    content: none;
}

.about-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 72px;
}

.about-text h2 {
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.about-text p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 15px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.team-member {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.team-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #0052ff 0%, #0044cc 100%);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
}

.team-member h4 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.team-member p {
    color: #666;
    font-size: 14px;
}

.honors-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.honor-item {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid #0052ff;
}

.honor-item h4 {
    color: #0052ff;
    font-size: 18px;
    margin-bottom: 5px;
}

.honor-item p {
    color: #666;
    font-size: 14px;
}

.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-section p {
    color: #aaa;
    line-height: 1.8;
    font-size: 14px;
}

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

.footer-section a {
    color: #aaa;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #666;
    font-size: 14px;
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 20px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .header-buttons {
        flex-wrap: wrap;
        justify-content: center;
    }

    .banner h1 {
        font-size: 32px;
    }

    .banner p {
        font-size: 16px;
    }

    .banner-buttons {
        flex-direction: column;
        align-items: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .about-section {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
    }

    .page-title {
        font-size: 28px;
    }

    .content-section {
        padding: 25px;
    }

    .stats {
        grid-template-columns: 1fr;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .news-detail .news-image {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .logo a {
        font-size: 20px;
    }

    .banner h1 {
        font-size: 26px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }

    .feature-card {
        padding: 30px 20px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 28px;
    }
}