body {
    font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
    background: #f7f7f7;
    margin: 0;
    color: #333;
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    padding: 40px 30px;
    backdrop-filter: blur(10px);
}

header {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid #f0f0f0;
}

.icon-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 16px auto;
    width: 80px;
    height: 80px;
}

.app-icon {
    width: 80px;
    height: 80px;
    border-radius: 18px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    object-fit: cover;
    display: block;
}

h1 {
    color: #2c3e50;
    font-size: 2.2em;
    margin: 0 0 8px 0;
    font-weight: 700;
}

.subtitle {
    color: #7f8c8d;
    font-size: 1.1em;
    margin: 0;
    font-weight: 400;
}

nav {
    text-align: right;
    margin-bottom: 24px;
}

.privacy-link {
    color: #667eea;
    text-decoration: none;
    font-size: 1em;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.privacy-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

main h2 {
    color: #667eea;
    font-size: 1.3em;
    margin: 2em 0 1em 0;
    font-weight: 600;
    display: flex;
    align-items: center;
}

main h2:before {
    content: "●";
    margin-right: 8px;
    color: #ff6b6b;
}

main section {
    margin-bottom: 2em;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

ol, ul {
    line-height: 1.6;
    color: #555;
}

li {
    margin-bottom: 8px;
}

a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    color: #5a6fd8;
    text-decoration: underline;
}

/* 隐私政策页面样式 */
.back-link {
    display: inline-block;
    margin-top: 16px;
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* 隐私政策页面特定样式 */
.privacy-container h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 8px;
}

.privacy-container h2 {
    color: #667eea;
    margin-top: 2em;
}

.privacy-container p {
    line-height: 1.8;
    color: #555;
    margin-bottom: 1em;
}

.privacy-container ul {
    line-height: 1.7;
    color: #555;
}

@media (max-width: 768px) {
    .container {
        margin: 0 10px;
        border-radius: 15px;
        padding: 24px 20px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    body {
        padding: 10px 0;
    }
}