:root {
    --primary-color: #4db2fe;
    --secondary-color: #f5f6fa;
    --gradient-start: #4db2fe;
    --gradient-end: #e2bfe2;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--secondary-color);
    color: #333;
    line-height: 1.6;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 2.5rem 0;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 内容区域样式 */
.container {
    max-width: 1200px;
    padding: 0 1rem;
}

.section {
    margin-bottom: 4rem;
}

.section-title {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    display: inline-block;
    position: relative;
    text-align: left;
    width: auto;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--gradient-start);
}

/* 导航栏样式 */
.nav-bar {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.back-button {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    font-size: 1.1rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.back-button:hover {
    background-color: rgba(255,255,255,0.1);
    color: white;
}

.page-title {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

/* 内容区域样式 */
.content-wrapper {
    margin-top: 4rem;
    padding: 2rem 0;
}

.feature-section {
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    padding: 2rem;
    margin-bottom: 2rem;
}

/* 响应式样式 */
@media (max-width: 768px) {
    .header {
        padding: 2rem 0;
        margin-bottom: 2rem;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .section {
        margin-bottom: 2rem;
    }

    .section-title {
        margin-bottom: 1.5rem;
    }

    .content-wrapper {
        margin-top: 3.5rem;
        padding: 1rem;
    }

    .feature-section {
        padding: 1rem;
    }

    .page-title {
        font-size: 1.1rem;
    }
}