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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    color: #0066cc;
    font-size: 28px;
    font-weight: bold;
}

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

.nav a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: #0066cc;
}

.nav a.active {
    color: #0066cc;
    font-weight: bold;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 60px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: #fff;
    color: #667eea;
    text-decoration: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: #fff;
    color: #667eea;
}

.btn-large {
    background: #0066cc;
    color: #fff;
    font-size: 20px;
    padding: 18px 50px;
}

.btn-large:hover {
    background: #0052a3;
}

.stats {
    background: #f8f9fa;
    padding: 60px 0;
}

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

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: #0066cc;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    color: #666;
}

.features {
    padding: 80px 0;
    background: #fff;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

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

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

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

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

.feature-desc {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 25px;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #0066cc;
    font-weight: bold;
}

.services {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.services .section-title {
    color: #fff;
}

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

.service-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
    backdrop-filter: blur(10px);
}

.service-item:hover {
    transform: translateY(-10px);
}

.service-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.service-title {
    font-size: 22px;
    margin-bottom: 15px;
}

.service-desc {
    opacity: 0.9;
}

.service-details {
    padding: 80px 0;
    background: #f8f9fa;
}

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

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

.detail-item {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.detail-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #0066cc;
}

.detail-content {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 20px;
}

.detail-features {
    list-style: none;
    padding: 0;
}

.detail-features li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: #666;
}

.detail-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #0066cc;
    font-weight: bold;
}

.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
    color: #fff;
}

.cta-section .section-title {
    color: #fff;
}

.cta-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
}

.contact {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

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

.contact-icon {
    font-size: 40px;
    width: 60px;
    height: 60px;
    background: #0066cc;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-text h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #666;
}

.contact-text p {
    font-size: 20px;
    color: #333;
}

.phone-number {
    font-size: 24px;
    font-weight: bold;
    color: #0066cc;
}

.contact-cta {
    text-align: center;
    padding: 40px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-cta h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #333;
}

.contact-cta p {
    font-size: 18px;
    color: #666;
    margin-bottom: 30px;
}

.footer {
    background: #333;
    color: #fff;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.footer-logo h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.footer-logo p {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    opacity: 0.6;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 15px;
    }

    .production-steps {
        grid-template-columns: 1fr;
    }

    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .functions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .why-us-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

.production {
    padding: 80px 0;
    background: #fff;
}

.production-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.step-item {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    color: #fff;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.step-desc {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

.scenarios {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.scenario-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.scenario-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.scenario-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.scenario-title {
    font-size: 22px;
    margin-bottom: 15px;
    color: #333;
}

.scenario-desc {
    color: #666;
    line-height: 1.6;
}

.functions {
    padding: 80px 0;
    background: #fff;
}

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

.function-item {
    background: #f8f9fa;
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.function-item:hover {
    transform: translateY(-5px);
    background: #fff;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.function-icon {
    font-size: 50px;
    margin-bottom: 15px;
}

.function-title {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.function-desc {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

.why-us {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.why-us .section-title {
    color: #fff;
}

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

.why-us-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: transform 0.3s;
}

.why-us-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
}

.why-us-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.why-us-title {
    font-size: 22px;
    margin-bottom: 15px;
}

.why-us-desc {
    opacity: 0.9;
    line-height: 1.6;
}

.articles {
    padding: 80px 0;
    background: #f8f9fa;
}

.articles .section-title {
    text-align: center;
    margin-bottom: 15px;
}

.articles .section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 60px;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.article-item {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.article-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.article-title {
    font-size: 22px;
    margin-bottom: 15px;
    color: #333;
}

.article-desc {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 20px;
}

.article-link {
    display: inline-block;
    color: #0066cc;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.article-link:hover {
    color: #004499;
}

.cases {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
}

.case-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.case-tab {
    padding: 12px 30px;
    background: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    transition: all 0.3s;
}

.case-tab:hover {
    border-color: #667eea;
    color: #667eea;
}

.case-tab.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: #fff;
}

.case-content {
    min-height: 400px;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.case-item {
    background: #fff;
    padding: 25px 20px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    cursor: pointer;
}

.case-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.case-icon {
    font-size: 50px;
    margin-bottom: 15px;
}

.case-name {
    font-size: 16px;
    color: #333;
    margin-bottom: 10px;
    line-height: 1.4;
    font-weight: 500;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 12px;
    font-size: 12px;
}

.case-item[data-category="scenic"] .case-tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.case-item[data-category="school"] .case-tag {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.case-item[data-category="museum"] .case-tag {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.case-item[data-category="enterprise"] .case-tag {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.case-category {
    display: none;
}

.case-category.active {
    display: block;
}