/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

#targetDiv {
    width: 100%;
    overflow-x: hidden;
}

/* 头部导航 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #4a6cf7;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

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

.nav-links a:hover {
    color: #4a6cf7;
}

/* 首屏 */
.hero {
    background: linear-gradient(135deg, #4a6cf7 0%, #6b8cff 100%);
    color: white;
    padding: 150px 20px 100px;
    text-align: center;
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    max-width: 800px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 600px;
    opacity: 0.9;
}

.downlbtnvmmn {
    background-color: white;
    color: #4a6cf7;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.downlbtnvmmn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* 产品分类 */
.products {
    padding: 100px 20px;
    background-color: white;
    text-align: center;
}

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

h2 {
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
    position: relative;
    text-align: center;
}

h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background-color: #4a6cf7;
    margin: 20px auto 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.product-card {
    background-color: #f9fafc;
    padding: 40px 20px;
    border-radius: 10px;
    transition: all 0.3s ease;
    border: 1px solid #e9ecf1;
}

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

.product-card i {
    font-size: 48px;
    color: #4a6cf7;
    margin-bottom: 20px;
}

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

.product-card p {
    color: #666;
}

/* 会员套餐 */
.pricing {
    padding: 100px 20px;
    background-color: #f5f7fa;
    text-align: center;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.pricing-card {
    background-color: white;
    padding: 50px 30px;
    border-radius: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border: 2px solid transparent;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.pricing-card.popular {
    border-color: #4a6cf7;
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: translateY(-10px) scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #4a6cf7;
    color: white;
    padding: 8px 25px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

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

.price {
    margin-bottom: 30px;
}

.amount {
    font-size: 48px;
    font-weight: 700;
    color: #4a6cf7;
}

.period {
    font-size: 18px;
    color: #666;
    margin-left: 5px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 40px;
    padding: 0;
}

.pricing-features li {
    padding: 10px 0;
    color: #666;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pricing-features i {
    color: #4caf50;
    margin-right: 10px;
    font-size: 18px;
}

/* 功能介绍 */
.features {
    padding: 100px 20px;
    background-color: #f5f7fa;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.feature-item {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.feature-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #4a6cf7;
}

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

/* 优势介绍 */
.advantages {
    padding: 100px 20px;
    background-color: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background-color: #f9fafc;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background-color: #e8f0ff;
    transform: translateX(5px);
}

.advantage-number {
    width: 50px;
    height: 50px;
    background-color: #4a6cf7;
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    flex-shrink: 0;
}

.advantage-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.advantage-content p {
    color: #666;
}

/* 版本历史 */
.version-history {
    padding: 100px 20px;
    background-color: #f5f7fa;
}

.version-list {
    margin-top: 50px;
    border-left: 3px solid #4a6cf7;
    padding-left: 40px;
}

.version-item {
    margin-bottom: 50px;
    position: relative;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.version-item:hover {
    transform: translateX(10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.version-item::before {
    content: '';
    position: absolute;
    left: -55px;
    top: 35px;
    width: 20px;
    height: 20px;
    background-color: #4a6cf7;
    border-radius: 50%;
    border: 4px solid white;
}

.version-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.version-number {
    font-size: 24px;
    font-weight: 700;
    color: #4a6cf7;
    margin: 0;
}

.version-date {
    color: #666;
    font-size: 16px;
}

.version-changes ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.version-changes li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 25px;
    line-height: 1.6;
}

.version-changes li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #4a6cf7;
    font-weight: bold;
    font-size: 20px;
    line-height: 1;
}

/* 常见问题 */
.faq {
    padding: 100px 20px;
    background-color: #f5f7fa;
}

.faq-item {
    background-color: white;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.faq-question {
    padding: 25px;
    background-color: white;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.faq-question:hover {
    background-color: #f9fafc;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: #4a6cf7;
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background-color: white;
}

.faq-answer p {
    padding: 25px 0;
    color: #666;
    line-height: 1.8;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

/* 底部 */
footer {
    background-color: #333;
    color: white;
    padding: 60px 20px 20px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    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: #4a6cf7;
}

.footer-section p,
.footer-section a {
    color: #ccc;
    text-decoration: none;
    line-height: 1.8;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #4a6cf7;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #555;
    color: #999;
}

/* 专题页面 */
.page-hero {
    background-color: #4a6cf7;
    color: white;
    padding: 120px 20px 60px;
    text-align: center;
}

.page-hero h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

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

.page-content {
    padding: 80px 20px;
    background-color: white;
}

/* 下载页面 */
.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.download-option {
    background-color: #f9fafc;
    padding: 40px 20px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #e9ecf1;
    transition: all 0.3s ease;
}

.download-option:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.download-option i {
    font-size: 64px;
    color: #4a6cf7;
    margin-bottom: 20px;
}

.download-option h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #333;
}

.download-option p {
    color: #666;
    margin-bottom: 30px;
}

/* 教程页面 */
.tutorial-steps {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-top: 50px;
}

.tutorial-step {
    display: flex;
    gap: 30px;
    align-items: flex-start;
    background-color: #f9fafc;
    padding: 30px;
    border-radius: 10px;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: #4a6cf7;
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 28px;
    font-weight: bold;
    flex-shrink: 0;
}

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

.step-content p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    .tutorial-step {
        flex-direction: column;
    }
    
    .step-number {
        align-self: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 20px 80px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .products, .features, .advantages, .faq {
        padding: 60px 20px;
    }
    
    .product-grid, .features-grid, .advantages-grid {
        grid-template-columns: 1fr;
    }
}