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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

#targetDiv {
    width: 100%;
    min-height: 100vh;
}

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

.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    color: #2d8cff;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

.nav-menu a:hover {
    color: #2d8cff;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 120px 20px 80px;
    text-align: center;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 14px 40px;
    background: #fff;
    color: #667eea;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.downlbtnvmmn {
    background: #2d8cff;
    color: #fff;
}

.downlbtnvmmn:hover {
    background: #1a7ae6;
}

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

.features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.feature-item {
    text-align: center;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

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

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

.advantages h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.advantage-item {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.advantage-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #2d8cff;
}

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

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

.testimonials h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.testimonial-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 40px;
    border-radius: 12px;
}

.testimonial-item p {
    font-size: 16px;
    margin-bottom: 20px;
    line-height: 1.8;
}

.author {
    font-style: italic;
    opacity: 0.8;
}

.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, #2d8cff 0%, #00d4ff 100%);
    color: #fff;
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #2d8cff;
}

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

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

.footer-section a {
    color: #999;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #666;
}

.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 120px 20px 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
}

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

.feature-detail {
    padding: 80px 0;
    background: #fff;
}

.feature-category {
    margin-bottom: 60px;
}

.feature-category h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #333;
}

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

.feature-detail-item {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    transition: transform 0.3s;
}

.feature-detail-item:hover {
    transform: translateY(-5px);
}

.feature-detail-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2d8cff;
}

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

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

.pricing h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.pricing-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
}

.pricing-card.featured {
    border: 3px solid #2d8cff;
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: #2d8cff;
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.price {
    font-size: 42px;
    font-weight: 700;
    color: #2d8cff;
    margin-bottom: 30px;
}

.price span {
    font-size: 16px;
    color: #666;
    font-weight: 400;
}

.pricing-features ul {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 10px 0;
    color: #666;
    font-size: 14px;
}

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

.faq h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.faq-item p {
    color: #666;
    font-size: 15px;
    line-height: 1.8;
}

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

.enterprise-features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.enterprise-item {
    text-align: center;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: transform 0.3s;
}

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

.enterprise-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

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

.enterprise-benefits {
    padding: 80px 0;
    background: #f8f9fa;
}

.enterprise-benefits h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.benefit-item {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.benefit-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #2d8cff;
}

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

.enterprise-cases {
    padding: 80px 0;
    background: #fff;
}

.enterprise-cases h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.case-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 40px;
    border-radius: 12px;
}

.case-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.case-item p {
    font-size: 15px;
    line-height: 1.8;
}

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

.contact-form h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: #333;
}

.contact-form p {
    text-align: center;
    font-size: 16px;
    color: #666;
    margin-bottom: 40px;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2d8cff;
}

.download-section {
    padding: 80px 0;
    background: #fff;
}

.download-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.download-item {
    text-align: center;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: transform 0.3s;
}

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

.download-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

.download-item p {
    color: #666;
    font-size: 14px;
    margin-bottom: 20px;
}

.system-requirements {
    padding: 80px 0;
    background: #f8f9fa;
}

.system-requirements h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.requirement-item {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.requirement-item h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: #2d8cff;
}

.requirement-item ul {
    list-style: none;
}

.requirement-item li {
    padding: 8px 0;
    color: #666;
    font-size: 14px;
}

.download-faq {
    padding: 80px 0;
    background: #fff;
}

.download-faq h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

.support-options {
    padding: 80px 0;
    background: #fff;
}

.support-options h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.support-item {
    text-align: center;
    padding: 40px 20px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: transform 0.3s;
}

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

.support-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

.support-item p {
    color: #666;
    font-size: 14px;
    margin-bottom: 20px;
}

.popular-topics {
    padding: 80px 0;
    background: #f8f9fa;
}

.popular-topics h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.topic-item {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

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

.topic-item h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.topic-item p {
    color: #666;
    font-size: 14px;
    margin-bottom: 15px;
}

.topic-item a {
    color: #2d8cff;
    text-decoration: none;
    font-weight: 600;
}

.faq-section {
    padding: 80px 0;
    background: #fff;
}

.faq-section h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
}

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

.contact-support h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: #333;
}

.contact-support p {
    text-align: center;
    font-size: 16px;
    color: #666;
    margin-bottom: 40px;
}

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

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content h1,
    .page-header h1 {
        font-size: 32px;
    }
    
    .feature-grid,
    .advantage-list,
    .testimonial-grid,
    .footer-content,
    .feature-list,
    .pricing-grid,
    .enterprise-grid,
    .benefit-list,
    .case-grid,
    .download-grid,
    .requirements-grid,
    .support-grid,
    .topic-grid {
        grid-template-columns: 1fr;
    }
    
    .features h2,
    .advantages h2,
    .testimonials h2,
    .cta h2,
    .pricing h2,
    .faq h2,
    .enterprise-features h2,
    .enterprise-benefits h2,
    .enterprise-cases h2,
    .download-section h2,
    .system-requirements h2,
    .download-faq h2,
    .support-options h2,
    .popular-topics h2,
    .faq-section h2,
    .contact-support h2 {
        font-size: 28px;
    }
}