/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 24px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.primary-btn {
    background-color: #007bff;
    color: #fff;
}

.primary-btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.primary-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 123, 255, 0.3);
}

.download-btn {
    background-color: #007bff;
    color: #fff;
    padding: 12px 30px;
    font-size: 18px;
}

.download-btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.download-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 123, 255, 0.3);
}

/* 头部导航 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 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 {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo span {
    font-size: 24px;
    font-weight: bold;
    color: #007bff;
}

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

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

.nav-item:hover,
.nav-item.active {
    color: #007bff;
}

.download-btn-container {
    display: flex;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: #333;
    transition: all 0.3s ease;
}

/* 首页Banner区 */
.banner {
    margin-top: 70px;
    position: relative;
    height: calc(100vh - 70px);
    overflow: hidden;
}

.banner-slider {
    position: relative;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.5s ease;
    background-color: #f8f9fa;
}

.banner-slide.active {
    opacity: 1;
}

.banner-content {
    text-align: center;
    max-width: 600px;
    margin-right: 50px;
}

.banner-content h1 {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 30px;
    color: #666;
}

.banner-image img {
    max-height: 400px;
    width: auto;
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #ccc;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background-color: #007bff;
    transform: scale(1.2);
}

/* 核心优势区 */
.advantages {
    padding: 80px 0;
    background-color: #fff;
}

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

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

.advantage-item {
    text-align: center;
    padding: 30px;
    background-color: #f8f9fa;
    border-radius: 8px;
    transition: all 0.3s ease;
}

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

.advantage-icon {
    margin-bottom: 20px;
}

.advantage-icon img {
    width: 80px;
    height: 80px;
}

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

.advantage-item p {
    color: #666;
    line-height: 1.6;
}

/* 下载中心 */
.download-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.download-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: #007bff;
    color: #007bff;
}

.tab-btn.active {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

.download-content {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.download-info {
    text-align: center;
    margin-bottom: 40px;
}

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

.download-steps {
    margin-bottom: 30px;
}

.download-steps h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.download-steps ol {
    list-style-position: inside;
    color: #666;
    line-height: 2;
}

.system-requirements h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.system-requirements p {
    color: #666;
}

/* 功能场景区 */
.features-section {
    padding: 80px 0;
    background-color: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-item {
    text-align: center;
    transition: all 0.3s ease;
}

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

.feature-image {
    margin-bottom: 20px;
}

.feature-image img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.feature-content p {
    color: #666;
    line-height: 1.6;
}

/* 常见问题 */
.faq-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.faq-categories {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-btn:hover {
    border-color: #007bff;
    color: #007bff;
}

.category-btn.active {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

.faq-content {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.faq-category {
    display: none;
}

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

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: #007bff;
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 500;
    margin: 0;
}

.faq-toggle {
    font-size: 24px;
    font-weight: bold;
    color: #666;
    transition: transform 0.3s ease;
}

.faq-toggle.active {
    transform: rotate(45deg);
    color: #007bff;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

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

.faq-answer p {
    padding: 0 0 20px 0;
    color: #666;
    line-height: 1.6;
}

/* 小Banner样式 */
.small-banner {
    height: 400px;
    text-align: center;
}

.small-banner .banner-content {
    margin-right: 0;
}

/* 关于我们页面样式 */
.about-section {
    padding: 80px 0;
    background-color: #fff;
}

.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
    flex-wrap: wrap;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text p {
    margin-bottom: 20px;
    color: #666;
    line-height: 1.8;
}

.about-image {
    flex: 1;
    min-width: 300px;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 团队介绍样式 */
.team-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

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

.team-member {
    text-align: center;
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.team-member:hover {
    transform: translateY(-10px);
}

.member-image {
    margin-bottom: 20px;
}

.member-image img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.member-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.member-info p {
    color: #666;
    margin-bottom: 5px;
    line-height: 1.6;
}

/* 发展历程样式 */
.history-section {
    padding: 80px 0;
    background-color: #fff;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #007bff;
    transform: translateX(-50%);
}

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 20px;
    width: 20px;
    height: 20px;
    background-color: #007bff;
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-date {
    flex: 0 0 150px;
    font-weight: bold;
    color: #007bff;
    font-size: 18px;
    text-align: right;
    padding-right: 50px;
    position: relative;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.timeline-content p {
    color: #666;
    line-height: 1.6;
}

/* 底部 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 40px;
    margin-right: 10px;
}

.footer-logo span {
    font-size: 24px;
    font-weight: bold;
    color: #007bff;
}

.footer-info p {
    color: #999;
    line-height: 1.6;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #fff;
}

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

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

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

.footer-links a:hover {
    color: #007bff;
}

.footer-contact p {
    color: #999;
    margin-bottom: 10px;
    line-height: 1.6;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copyright p {
    color: #999;
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

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

.footer-legal a:hover {
    color: #007bff;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
    
    .banner-content h1 {
        font-size: 40px;
    }
    
    .banner-content p {
        font-size: 18px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: #fff;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: left 0.3s ease;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .download-btn-container {
        display: none;
    }
    
    .banner-slide {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    
    .banner-content {
        margin-right: 0;
        margin-bottom: 30px;
    }
    
    .banner-content h1 {
        font-size: 32px;
    }
    
    .banner-content p {
        font-size: 16px;
    }
    
    .banner-image img {
        max-height: 300px;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    .banner-content h1 {
        font-size: 28px;
    }
    
    .banner-content p {
        font-size: 14px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 200px;
    }
    
    .faq-categories {
        flex-direction: column;
        align-items: center;
    }
    
    .category-btn {
        width: 100%;
        max-width: 200px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-legal {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    /* 关于我们页面响应式 */
    .about-content {
        flex-direction: column;
        text-align: center;
    }
    
    /* 时间线响应式 */
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        margin-left: 50px;
    }
    
    .timeline-item::before {
        left: 20px;
    }
    
    .timeline-date {
        flex: none;
        text-align: left;
        padding-right: 0;
        margin-bottom: 10px;
    }
}

@media (max-width: 576px) {
    .container {
        max-width: 100%;
        padding: 0 15px;
    }
    
    .download-content {
        padding: 20px;
    }
    
    .faq-content {
        padding: 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    /* 时间线移动端适配 */
    .timeline-item {
        margin-left: 30px;
    }
    
    .timeline-date {
        font-size: 16px;
    }
}