/* 关于页面样式 - 超轻量级实现 */

/* 页面标题区域 */
.about-header {
    background: linear-gradient(to right, #3498db, #2980b9);
    color: white;
    padding: 3rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

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

.about-header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
}

/* 内容布局 */
.about-content {
    padding: 2rem 0 4rem;
}

.about-content .container {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 2rem;
}

/* 侧边导航 */
.about-nav {
    background-color: #f5f7fa;
    border-radius: 8px;
    padding: 1.5rem;
    position: sticky;
    top: 2rem;
    align-self: start;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.about-nav h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e0e0e0;
    color: #2c3e50;
}

.about-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-nav li {
    margin-bottom: 0.5rem;
}

.about-nav a {
    display: block;
    padding: 0.5rem;
    color: #333;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.about-nav a:hover {
    background-color: #eaeff5;
    color: #3498db;
}

/* 主要内容区域 */
.about-main {
    background-color: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.about-section {
    margin-bottom: 3rem;
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section h3 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #3498db;
}

.about-section p {
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: #333;
}

/* 特性展示 */
.about-feature {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.about-feature h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.about-feature ul {
    padding-left: 1.5rem;
}

.about-feature li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

/* 使命展示 */
.mission-goals {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.goal {
    background-color: #f5f7fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-top: 3px solid #3498db;
}

.goal h4 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: #2c3e50;
}

.goal p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* 技术栈展示 */
.tech-stack {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.tech {
    background-color: #f5f7fa;
    padding: 1.5rem;
    border-radius: 8px;
}

.tech h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #2c3e50;
    text-align: center;
}

.tech ul {
    padding-left: 1.2rem;
}

.tech li {
    margin-bottom: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content .container {
        grid-template-columns: 1fr;
    }
    
    .about-nav {
        position: static;
        margin-bottom: 2rem;
    }
    
    .mission-goals,
    .tech-stack {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-header h2 {
        font-size: 2rem;
    }
    
    .about-header p {
        font-size: 1rem;
    }
    
    .about-section h3 {
        font-size: 1.5rem;
    }
    
    .mission-goals,
    .tech-stack {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .about-header {
        padding: 2rem 0;
    }
    
    .about-main {
        padding: 1.5rem;
    }
    
    .mission-goals {
        gap: 1rem;
    }
}