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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

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

/* 头部样式 */
header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
}

nav a:hover {
    color: #f0f0f0;
}

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

/* 主要内容样式 */
.hero {
    background-color: #007bff;
    color: #fff;
    padding: 4rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
}

.about-preview {
    padding: 4rem 0;
    background-color: #fff;
}

.about-preview h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.about-preview p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.btn {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 4px;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0069d9;
}

.contact {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.contact h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.contact-info {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.contact-info p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* 关于页面样式 */
.about-page {
    padding: 4rem 0;
    background-color: #fff;
}

.about-page h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #333;
}

.about-content {
    max-width: 900px;
}

.about-content h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.about-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* 隐私政策页面样式 */
.privacy-page {
    padding: 4rem 0;
    background-color: #fff;
}

.privacy-page h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #333;
}

.privacy-content {
    max-width: 900px;
}

.privacy-content h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.privacy-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.privacy-content ul {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.privacy-content li {
    margin-bottom: 0.5rem;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: #fff;
    padding: 3rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.footer-info h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
}

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

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 1.5rem;
    text-align: center;
    color: #ccc;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        margin-top: 1rem;
        justify-content: center;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-links ul {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .about-preview,
    .contact,
    .about-page,
    .privacy-page {
        padding: 2rem 0;
    }

    .about-preview h3,
    .contact h3,
    .about-page h2,
    .privacy-page h2 {
        font-size: 1.5rem;
    }
}