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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

#targetDiv {
    width: 100%;
    min-height: 100vh;
    background-color: #f5f5f5;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background-color: #2D8CFF;
    color: white;
}

.btn-primary:hover {
    background-color: #1A73E8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(45, 140, 255, 0.3);
}

.btn-secondary {
    background-color: white;
    color: #2D8CFF;
    border: 2px solid #2D8CFF;
}

.btn-secondary:hover {
    background-color: #2D8CFF;
    color: white;
}

.btn-link {
    background: none;
    color: #2D8CFF;
    text-decoration: underline;
    padding: 0;
}

.btn-link:hover {
    color: #1A73E8;
}

.downlbtnvmmn {
    background-color: #2D8CFF;
    color: white;
    font-weight: 600;
    padding: 14px 28px;
    font-size: 18px;
}

.downlbtnvmmn:hover {
    background-color: #1A73E8;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(45, 140, 255, 0.4);
}

/* 头部导航样式 */
.header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo h1 {
    color: #2D8CFF;
    font-size: 28px;
    font-weight: 700;
}

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

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

.nav-links a:hover {
    color: #2D8CFF;
}

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

/* 首屏样式 */
.hero {
    background: linear-gradient(135deg, #2D8CFF 0%, #1A73E8 100%);
    color: white;
    padding: 160px 0 100px;
    text-align: center;
    background-size: cover;
    background-position: center;
}

.hero-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

/* 产品分类板块 */
.product-categories {
    padding: 80px 0;
    background-color: white;
}

.product-categories h3 {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 50px;
    color: #333;
}

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

.category-card {
    background-color: #f8f9fa;
    padding: 40px 20px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.category-card h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2D8CFF;
}

/* 版本更新板块 */
.updates {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.updates h3 {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 50px;
    color: #333;
}

.updates-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.update-item {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.update-item h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2D8CFF;
}

.update-item ul {
    list-style: disc;
    padding-left: 20px;
    gap: 10px;
}

.update-item li {
    margin-bottom: 8px;
}

/* 优势介绍板块 */
.advantages {
    padding: 80px 0;
    background-color: white;
}

.advantages h3 {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 50px;
    color: #333;
}

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

.advantage-item {
    background-color: #f8f9fa;
    padding: 40px 20px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.advantage-item h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2D8CFF;
}

/* 常见问题预览 */
.faq-preview {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.faq-preview h3 {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 50px;
    color: #333;
}

.faq-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.faq-item {
    background-color: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2D8CFF;
}

/* 关于我们板块 */
.about {
    padding: 80px 0;
    background-color: white;
    text-align: center;
}

.about h3 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.about p {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto;
    color: #666;
}

/* 底部版权板块 */
.footer {
    background-color: #333;
    color: white;
    padding: 40px 0;
}

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

.footer-logo h2 {
    color: white;
    font-size: 28px;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #2D8CFF;
}

.footer-copyright {
    color: #999;
    font-size: 14px;
}

/* 下载页面样式 */
.download-page {
    padding: 120px 0 80px;
    background-color: white;
}

.download-page h2 {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.download-page p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 60px;
    color: #666;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
}

.download-option {
    background-color: #f8f9fa;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
}

.download-option:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.download-option h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2D8CFF;
}

.download-option p {
    font-size: 16px;
    margin-bottom: 30px;
    text-align: left;
}

/* 常见问题页面样式 */
.faq-page {
    padding: 120px 0 80px;
    background-color: white;
}

.faq-page h2 {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.faq-page p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 60px;
    color: #666;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {n    margin-bottom: 30px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
}

.faq-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2D8CFF;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item h3:after {
    content: '+';
    font-size: 24px;
    transition: transform 0.3s ease;
}

.faq-item.active h3:after {
    transform: rotate(45deg);
}

.faq-item-content {
    display: none;
    color: #666;
    line-height: 1.8;
}

.faq-item.active .faq-item-content {
    display: block;
}

/* 功能介绍页面样式 */
.features-page {
    padding: 120px 0 80px;
    background-color: white;
}

.features-page h2 {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.features-page p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 60px;
    color: #666;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.feature-item {
    background-color: #f8f9fa;
    padding: 40px 30px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.feature-item h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #2D8CFF;
}

.feature-item p {
    font-size: 16px;
    text-align: left;
    margin-bottom: 20px;
}

.feature-item ul {
    list-style: disc;
    padding-left: 20px;
}

.feature-item li {
    margin-bottom: 8px;
    color: #666;
}

/* 下载安装使用教程页面样式 */
.tutorial-page {
    padding: 120px 0 80px;
    background-color: white;
}

.tutorial-page h2 {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.tutorial-page p {
    text-align: center;
    font-size: 18px;
    margin-bottom: 60px;
    color: #666;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.tutorial-steps {
    max-width: 900px;
    margin: 0 auto;
}

.tutorial-step {
    background-color: #f8f9fa;
    padding: 40px 30px;
    border-radius: 12px;
    margin-bottom: 40px;
    transition: all 0.3s ease;
}

.tutorial-step:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.tutorial-step h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #2D8CFF;
}

.tutorial-step p {
    font-size: 16px;
    text-align: left;
    margin-bottom: 20px;
    max-width: 100%;
}

.tutorial-step ul {
    list-style: disc;
    padding-left: 20px;
    margin-bottom: 20px;
}

.tutorial-step li {
    margin-bottom: 8px;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-content h2 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .product-categories h3,
    .updates h3,
    .advantages h3,
    .faq-preview h3,
    .about h3 {
        font-size: 28px;
    }

    .download-page h2,
    .faq-page h2,
    .features-page h2,
    .tutorial-page h2 {
        font-size: 32px;
    }

    .categories-grid,
    .advantages-grid,
    .download-options,
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 28px;
    }

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

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .downlbtnvmmn {
        padding: 12px 24px;
        font-size: 16px;
    }
}