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

body {
    font-family: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background-color: #f5f5f5;
}

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

a:hover {
    color: #004499;
}

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

header {
    background: linear-gradient(135deg, #1a2d4e 0%, #0f1a2e 100%);
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #00d4ff;
}

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

.btn {
    padding: 10px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #1a2d4e;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,212,255,0.4);
}

.btn-secondary {
    background: transparent;
    border: 2px solid #00d4ff;
    color: #00d4ff;
}

.btn-secondary:hover {
    background: rgba(0,212,255,0.1);
}

nav {
    margin-top: 15px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 35px;
}

nav a {
    color: white;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: #00d4ff;
}

.hero {
    background: linear-gradient(135deg, #1a2d4e 0%, #0f1a2e 50%, #1a2d4e 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

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

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

.section {
    padding: 80px 0;
}

.section-white {
    background: white;
}

.section-light {
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    color: #1a2d4e;
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    font-size: 18px;
}

.features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    background: white;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    border-radius: 50%;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.feature-item h3 {
    color: #1a2d4e;
    margin-bottom: 15px;
    font-size: 20px;
}

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

.stats {
    background: linear-gradient(135deg, #1a2d4e 0%, #0f1a2e 100%);
    color: white;
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item h3 {
    font-size: 48px;
    color: #00d4ff;
    margin-bottom: 10px;
}

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

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

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

.news-image {
    height: 200px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 48px;
}

.news-content {
    padding: 25px;
}

.news-meta {
    color: #999;
    font-size: 14px;
    margin-bottom: 10px;
}

.news-title {
    color: #1a2d4e;
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: 600;
}

.news-desc {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
}

.cta {
    background: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
    padding: 80px 0;
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.95;
}

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

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

.cta .btn-secondary {
    background: white;
    border-color: white;
    color: #0066cc;
}

.cta .btn-secondary:hover {
    background: rgba(255,255,255,0.9);
}

footer {
    background: #0f1a2e;
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about h3 {
    color: #00d4ff;
    font-size: 24px;
    margin-bottom: 20px;
}

.footer-about p {
    opacity: 0.8;
    line-height: 1.8;
}

.footer-links h4 {
    margin-bottom: 25px;
    font-size: 18px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #00d4ff;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
}

.breadcrumb {
    background: #f5f5f5;
    padding: 15px 0;
    border-bottom: 1px solid #e5e5e5;
}

.breadcrumb ul {
    display: flex;
    list-style: none;
    gap: 10px;
}

.breadcrumb a {
    color: #666;
}

.breadcrumb span {
    color: #999;
}

.breadcrumb .current {
    color: #1a2d4e;
    font-weight: 500;
}

.page-content {
    background: white;
    min-height: 800px;
}

.page-header {
    background: linear-gradient(135deg, #1a2d4e 0%, #0f1a2e 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.about-content {
    padding: 60px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 60px;
}

.about-text h2 {
    color: #1a2d4e;
    font-size: 32px;
    margin-bottom: 20px;
}

.about-text p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 16px;
}

.about-image {
    height: 400px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 80px;
}

.values {
    margin-top: 60px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.value-item {
    text-align: center;
    padding: 40px 30px;
    background: #f8f9fa;
    border-radius: 10px;
}

.value-item h3 {
    color: #1a2d4e;
    margin-bottom: 15px;
}

.value-item p {
    color: #666;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    padding: 60px 0;
}

.product-card {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.product-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
    border-radius: 10px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.product-card h2 {
    color: #1a2d4e;
    margin-bottom: 15px;
}

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

.product-features {
    list-style: none;
    margin-bottom: 25px;
}

.product-features li {
    color: #666;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.product-features li:before {
    content: "✓";
    color: #00d4ff;
    margin-right: 10px;
}

.news-list {
    padding: 60px 0;
}

.news-list-item {
    display: flex;
    gap: 30px;
    padding: 30px 0;
    border-bottom: 1px solid #eee;
}

.news-list-image {
    width: 300px;
    height: 200px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
    border-radius: 10px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 48px;
}

.news-list-content {
    flex: 1;
}

.news-list-title {
    font-size: 22px;
    color: #1a2d4e;
    margin-bottom: 10px;
    font-weight: 600;
}

.news-list-meta {
    color: #999;
    margin-bottom: 15px;
}

.news-list-desc {
    color: #666;
    line-height: 1.8;
}

.news-detail {
    padding: 60px 0;
}

.news-article {
    max-width: 800px;
    margin: 0 auto;
}

.news-article h1 {
    color: #1a2d4e;
    font-size: 32px;
    margin-bottom: 20px;
}

.news-article-meta {
    color: #999;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.news-article-content p {
    color: #333;
    margin-bottom: 20px;
    line-height: 2;
    font-size: 16px;
}

.news-article-content h2 {
    color: #1a2d4e;
    font-size: 24px;
    margin: 30px 0 15px;
}

.contact-content {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    color: #1a2d4e;
    font-size: 28px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066cc 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    flex-shrink: 0;
}

.contact-text h3 {
    color: #1a2d4e;
    margin-bottom: 5px;
}

.contact-text p {
    color: #666;
}

.contact-form {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 10px;
}

.contact-form h2 {
    color: #1a2d4e;
    font-size: 28px;
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    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: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #00d4ff;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
    padding: 15px;
    font-size: 16px;
}

.mobile-buttons {
    display: none;
}

@media (max-width: 992px) {
    .features,
    .stats-grid,
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-grid,
    .products-grid,
    .values-grid,
    .contact-grid,
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-image {
        height: 300px;
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
    }
    .hero h1 {
        font-size: 32px;
    }
    .hero p {
        font-size: 16px;
    }
    .section-title h2 {
        font-size: 28px;
    }
    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    .mobile-buttons {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: #1a2d4e;
        padding: 15px;
        gap: 15px;
        justify-content: center;
        z-index: 999;
    }
    .mobile-buttons .btn {
        flex: 1;
        max-width: 200px;
    }
    footer {
        padding-bottom: 100px;
    }
    .news-list-item {
        flex-direction: column;
    }
    .news-list-image {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .features,
    .stats-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .header-top {
        flex-direction: column;
        gap: 15px;
    }
    .logo {
        font-size: 24px;
    }
}