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

body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #f5f7fa;
}

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

.header {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    color: white;
    padding: 15px 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 {
    font-size: 24px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1a73e8;
    font-weight: bold;
    font-size: 18px;
}

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

.nav a {
    color: white;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 5px;
    transition: background 0.3s;
    font-size: 16px;
}

.nav a:hover {
    background: rgba(255,255,255,0.2);
}

.hero {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

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

.hero p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 30px;
    opacity: 0.95;
}

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

.btn-primary {
    background: #fff;
    color: #1a73e8;
    padding: 15px 40px;
    border: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    padding: 15px 40px;
    border: 2px solid white;
    border-radius: 30px;
    font-size: 18px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.3s;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.2);
}

.features {
    padding: 80px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: #1a73e8;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #666;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #f8f9fa;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    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, #1a73e8 0%, #0d47a1 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    color: white;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
    font-size: 16px;
}

.about-preview {
    padding: 80px 0;
    background: #f5f7fa;
}

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

.about-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #1a73e8;
}

.about-text p {
    font-size: 18px;
    color: #555;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    background: white;
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 15px rgba(0,0,0,0.05);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #1a73e8;
}

.stat-label {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

.about-image {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    height: 400px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 100px;
}

.products-section {
    padding: 80px 0;
    background: white;
}

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

.product-card {
    background: #f8f9fa;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: white;
}

.product-info {
    padding: 30px;
}

.product-info h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.product-info p {
    color: #666;
    margin-bottom: 20px;
}

.product-link {
    color: #1a73e8;
    text-decoration: none;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.product-link:hover {
    text-decoration: underline;
}

.news-section {
    padding: 80px 0;
    background: #f5f7fa;
}

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

.news-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    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 {
    height: 200px;
    background: linear-gradient(135deg, #43a047 0%, #2e7d32 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: white;
}

.news-content {
    padding: 30px;
}

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

.news-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.news-content p {
    color: #666;
    font-size: 15px;
}

.news-link {
    color: #1a73e8;
    text-decoration: none;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-top: 15px;
}

.contact-section {
    padding: 80px 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #1a73e8;
}

.contact-info p {
    font-size: 18px;
    color: #555;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: #1a73e8;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.contact-form {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 15px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
}

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

.form-btn {
    background: #1a73e8;
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.form-btn:hover {
    background: #0d47a1;
}

.footer {
    background: #1a1a2e;
    color: white;
    padding: 60px 0 30px;
}

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

.footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #1a73e8;
}

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

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

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

.footer-section a:hover {
    color: #1a73e8;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #888;
}

.page-banner {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

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

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

.breadcrumb {
    padding: 15px 0;
    background: #f5f7fa;
}

.breadcrumb .container {
    font-size: 14px;
    color: #666;
}

.breadcrumb a {
    color: #1a73e8;
    text-decoration: none;
}

.breadcrumb span {
    margin: 0 10px;
}

.content-section {
    padding: 60px 0;
    background: white;
}

.content-section:nth-child(even) {
    background: #f5f7fa;
}

.content-block {
    margin-bottom: 50px;
}

.content-block h2 {
    font-size: 32px;
    color: #1a73e8;
    margin-bottom: 20px;
    border-left: 4px solid #1a73e8;
    padding-left: 15px;
}

.content-block p {
    font-size: 17px;
    color: #555;
    margin-bottom: 15px;
    text-align: justify;
}

.content-block ul {
    list-style: none;
    padding-left: 0;
}

.content-block ul li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    font-size: 16px;
    color: #555;
}

.content-block ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #1a73e8;
    font-weight: bold;
}

.highlight-box {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    color: white;
    padding: 40px;
    border-radius: 15px;
    margin: 30px 0;
}

.highlight-box h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.highlight-box p {
    color: rgba(255,255,255,0.9);
}

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

.security-item {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    border-left: 4px solid #1a73e8;
}

.security-item h4 {
    font-size: 20px;
    color: #333;
    margin-bottom: 10px;
}

.security-item p {
    color: #666;
    font-size: 15px;
}

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

.team-member {
    text-align: center;
}

.team-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.team-member h4 {
    font-size: 20px;
    color: #333;
    margin-bottom: 5px;
}

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

.timeline {
    position: relative;
    padding-left: 40px;
    margin-top: 40px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #1a73e8;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -32px;
    top: 5px;
    width: 12px;
    height: 12px;
    background: #1a73e8;
    border-radius: 50%;
}

.timeline-date {
    font-size: 14px;
    color: #1a73e8;
    font-weight: bold;
    margin-bottom: 10px;
}

.timeline-content {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
}

.timeline-content h4 {
    font-size: 20px;
    color: #333;
    margin-bottom: 10px;
}

.timeline-content p {
    color: #666;
    font-size: 15px;
}

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

.news-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px;
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.news-thumbnail {
    height: 150px;
    background: linear-gradient(135deg, #43a047 0%, #2e7d32 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.news-info h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: #333;
}

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

.news-info p {
    color: #666;
    font-size: 15px;
    margin-bottom: 15px;
}

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

.article-header {
    margin-bottom: 40px;
}

.article-header h1 {
    font-size: 36px;
    color: #333;
    margin-bottom: 15px;
}

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

.article-content {
    font-size: 17px;
    line-height: 1.9;
    color: #555;
}

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

.article-content h2 {
    font-size: 26px;
    color: #1a73e8;
    margin: 30px 0 15px;
}

.article-content ul {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

.article-content ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.article-content ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #1a73e8;
    font-weight: bold;
}

.related-news {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid #eee;
}

.related-news h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

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

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

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

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

    .news-thumbnail {
        height: 180px;
    }
}