:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #64748b;
    --success-color: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
}

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

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

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* 标语和下载区域 */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    text-align: center;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero p {
    font-size: 1.2rem;
    color: var(--gray-color);
    max-width: 700px;
    margin: 0 auto 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(37, 99, 235, 0.3);
}

.btn i {
    margin-right: 10px;
    font-size: 1.2rem;
}

.platform-images {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.platform {
    text-align: center;
    width: 200px;
}

.platform img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    object-fit: cover;
}

.platform p {
    margin-top: 15px;
    font-weight: 600;
}

/* 优势区域 */
.advantages {
    padding: 80px 0;
    background-color: white;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

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

.advantage-card {
    background-color: var(--light-color);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.advantage-card:hover {
    transform: translateY(-5px);
}

.advantage-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.advantage-card h3 {
    margin-bottom: 15px;
}

.advantage-card p {
    color: var(--gray-color);
}

/* 亮点区域 */
.highlights {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.highlight-content {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 40px;
}

.highlight-text {
    flex: 1;
}

.highlight-image {
    flex: 1;
    text-align: center;
}

.highlight-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.feature-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
}

.feature-list i {
    color: var(--success-color);
    margin-right: 10px;
    font-size: 1.2rem;
    margin-top: 3px;
}

/* 用户评价区域 */
.testimonials {
    padding: 80px 0;
    background-color: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: var(--light-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 20px;
    color: var(--gray-color);
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--accent-color);
    margin-right: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.author-details h4 {
    margin-bottom: 5px;
}

.author-details p {
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* 常见问题区域 */
.faq {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

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

.accordion-item {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.accordion-header {
    background-color: white;
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.accordion-content {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s, padding 0.3s;
    background-color: white;
}

.accordion-content.active {
    padding: 20px;
    max-height: 200px;
}

/* 正文区域 */
.article {
    padding: 80px 0;
    background-color: white;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
}

.article-content h2 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

.article-content p {
    margin-bottom: 20px;
    color: var(--gray-color);
}

/* 新闻区域 */
.news {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.news-image {
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-content {
    padding: 20px;
}

.news-date {
    color: var(--gray-color);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.news-title {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.news-excerpt {
    color: var(--gray-color);
    margin-bottom: 15px;
}

.news-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
}

.news-link i {
    margin-left: 5px;
    transition: transform 0.3s;
}

.news-link:hover i {
    transform: translateX(5px);
}

/* 页脚 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

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

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: background-color 0.3s;
}

.social-links a:hover {
    background-color: var(--primary-color);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #cbd5e1;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .platform-images {
        flex-direction: column;
        align-items: center;
    }
    
    .highlight-content {
        flex-direction: column;
    }
}