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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 导航栏 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo h1 {
    color: #4a90e2;
    font-size: 24px;
    font-weight: 700;
}

.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;
}

.nav-links a:hover {
    color: #4a90e2;
}

.mobile-menu {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: #333;
    transition: all 0.3s;
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #4a90e2 0%, #6c63ff 100%);
    color: #fff;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

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

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background-color: #fff;
    color: #4a90e2;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.app-mockup {
    position: relative;
    height: 400px;
}

.mockup-iphone,
.mockup-ipad {
    /* background-color: rgba(255, 255, 255, 0.1); */
    /* border-radius: 20px; */
    /* border: 2px solid rgba(255, 255, 255, 0.2); */
    position: absolute;
}

.mockup-iphone {
    width: 407px;
    height: 200px;
    top: 100px;
    left: 50px;
}

.mockup-ipad {
    width: 300px;
    height: 230px;
    top: 85px;
    right: 30px;
}

/* 产品特性 */
.features {
    padding: 80px 0;
    background-color: #fff;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: #4a90e2;
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
}

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

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

/* 下载区域 */
.download {
    padding: 80px 0;
    background-color: #f8f9fa;
    text-align: center;
}

.download h2 {
    font-size: 36px;
    margin-bottom: 40px;
    color: #333;
}

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

.download-btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: #333;
    color: #fff;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: all 0.3s;
}

.download-btn.ios {
    background-color: #000;
}

.download-btn.android {
    background-color: #4caf50;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 用户评价 */
.testimonials {
    padding: 80px 0;
    background-color: #fff;
}

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

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    border-left: 4px solid #4a90e2;
}

.testimonial-card p {
    font-style: italic;
    color: #666;
    margin-bottom: 20px;
}

.testimonial-author {
    font-weight: 600;
    color: #333;
}

/* 隐私政策 */
.privacy {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.privacy h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
    color: #333;
}

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

.privacy-content h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #4a90e2;
}

.privacy-content p {
    margin-bottom: 20px;
    color: #666;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 40px 0;
}

.footer .container {
    display: flex;
    flex-direction: column;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.footer-logo p {
    opacity: 0.8;
}

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

.footer-links a {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    opacity: 0.8;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        margin-bottom: 40px;
    }
    
    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .download-links {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links ul {
        margin-top: 20px;
        justify-content: center;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.testimonial-card {
    animation: fadeInUp 0.6s ease-out;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.4s;
}

.testimonial-card:nth-child(2) {
    animation-delay: 0.2s;
}

.testimonial-card:nth-child(3) {
    animation-delay: 0.4s;
}