/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* Navigation Bar Styles */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.logo h1 {
    color: #2c3e50;
    font-size: 2.0rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

.nav-links a:hover, .nav-links a.active {
    color: #3498db;
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: #333;
    border-radius: 5px;
    transition: all 0.3s ease;
}

/* Main Content Styles */
main {
    margin-top: 80px;
}

/* Scroll Section Styles */
.scroll-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 60px 0;
}

.section-1 {
    background-color: #fff;
}

.section-2 {
    background-color: #f8f9fa;
}

.section-3 {
    background-color: #fff;
}

.section-4 {
    background-color: #f8f9fa;
}

.section-5 {
    background-color: #fff;
}

.section-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.section-content.reverse {
    grid-template-columns: 1fr 1fr;
    direction: rtl;
}

.section-content.reverse > * {
    direction: ltr;
}

.section-text h2 {
    font-size: 2.8rem;
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-text p {
    font-size: 24px;
    color: #000;
    margin-bottom: 2rem;
}

.download-btn {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 12px 24px;
    font-size: 1.1rem;
    font-weight: 500;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.download-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.section-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.section-image img:hover {
    transform: scale(1.02);
}

/* Privacy Policy and Terms of Service Styles */
.privacy-section, .terms-section {
    padding: 60px 0;
    background-color: #fff;
}

.privacy-section h2, .terms-section h2 {
    font-size: 2.2rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    text-align: center;
    font-weight: normal;
}

.privacy-section h3, .terms-section h3 {
    font-size: 1.5rem;
    color: #000000;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: normal;
}

.privacy-section p, .terms-section p {
    font-size: 1rem;
    color: #666;
    margin-bottom: 1rem;
}

.privacy-section ul, .terms-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.privacy-section li, .terms-section li {
    font-size: 1rem;
    color: #666;
    margin-bottom: 0.5rem;
}

/* Divider Style */
.divider {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 2rem 0;
    width: 100%;
}

/* Footer Styles */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 40px 0;
    margin-top: 40px;
}

footer .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: center;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

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

.footer-links a:hover {
    color: #3498db;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 1rem 0;
}

.social-links a {
    color: #fff;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #3498db;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* 导航栏响应式 */
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: #fff;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: left 0.3s ease;
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    /* 滚动页面响应式 */
    .section-content,
    .section-content.reverse {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .section-text h2 {
        font-size: 2.2rem;
    }

    .download-btn {
        justify-content: center;
        margin: 0 auto;
    }

    /* 隐私协议和用户协议页面响应式 */
    .privacy-section h2, .terms-section h2 {
        font-size: 1.8rem;
    }

    .privacy-section h3, .terms-section h3 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    /* 导航栏响应式 */
    .logo h1 {
        font-size: 1.7rem;
    }

    /* 滚动页面响应式 */
    .section-text h2 {
        font-size: 2rem;
    }

    .section-text p {
        font-size: 1.1rem;
    }

    .scroll-section {
        padding: 40px 0;
    }

    /* 页脚响应式 */
    footer .container {
        grid-template-columns: 1fr;
    }

    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
}

/* Animation Effects - Controlled by GSAP */