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

/* 基础样式 */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

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

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* 主要内容区域 */
.main {
    padding: 3rem 0;
}

/* Hero区域 */
.hero {
    text-align: center;
    padding: 3rem 0;
    background: white;
    margin-bottom: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

.hero-description {
    font-size: 1.2rem;
    color: #4a5568;
    max-width: 600px;
    margin: 0 auto;
}

/* 功能区域 */
.features {
    margin-bottom: 4rem;
}

.features h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2d3748;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

.feature-card p {
    color: #4a5568;
    line-height: 1.6;
}

/* 下载区域 */
.download {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 3rem 0;
    border-radius: 12px;
    margin-bottom: 4rem;
}

.download h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.download-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.app-info {
    flex: 1;
    min-width: 250px;
}

.app-info p {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.app-store-badge {
    text-align: center;
}

.coming-soon {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 技术支持区域 */
.support {
    margin-bottom: 4rem;
}

.support h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2d3748;
}

.support-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.faq h4, .contact h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #2d3748;
}

.faq-item {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e2e8f0;
}

.faq-item h5 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.faq-item p {
    color: #4a5568;
    line-height: 1.6;
}

.contact ul {
    list-style: none;
    margin: 1rem 0;
}

.contact li {
    margin-bottom: 0.5rem;
    color: #4a5568;
}

.btn {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #5a6fd8;
}

/* 关于区域 */
.about {
    background: white;
    padding: 3rem 0;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.about h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #2d3748;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    margin-bottom: 1.5rem;
    color: #4a5568;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #2d3748;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer p {
    margin-bottom: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .support-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .download-info {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 1.8rem;
    }
    
    .features h3, .download h3, .support h3, .about h3 {
        font-size: 1.5rem;
    }
}