/* 关于页面公共样式 */
.main-content {
    position: relative;
    min-height: 400px;
    background: url('../images/sky-bg.svg') no-repeat center top;
    background-size: cover;
    padding: 20px 0;
    z-index: 1;

}
/* 内容区域布局 */
.about-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 导航 */
.breadcrumb {
    margin-bottom: 2rem;
    background: #fff;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* 导航列表 */
.vertical-nav {
    display: flex;
    gap: 3rem;
    list-style: none;
    padding: 0;
    margin: 0;
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
    justify-content: flex-start;
}

.vertical-nav a {
    color: #666;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 0.5rem 0;
    position: relative;
    transition: all 0.3s ease;
    font-weight: 500;
}

.vertical-nav a.active {
    color: #1a73e8;
    font-weight: 600;
}

.vertical-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: #1a73e8;
    border-radius: 3px 3px 0 0;
}

.vertical-nav a:hover {
    color: #1a73e8;
}

/* 主要内容区域 */
.about-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.about-section h2 {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f0f0f0;
    position: relative;
    font-weight: 600;
}

.about-section h2:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100px;
    height: 3px;
    background-color: #1a73e8;
    border-radius: 3px;
}

/* 通用文本样式 */
.about-text {
    color: #4a5568;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 1rem;
    font-size: 1rem;
    color: #2d3748;
}

.about-text h3 {
    color: #2d3748;
    font-size: 1.4rem;
    margin: 2rem 0 1rem;
    font-weight: 600;
}

/* 通用列表样式 */
.about-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.about-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    color: #2d3748;
}

.about-list li:before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #1a73e8;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .about-content {
        padding: 1rem;
    }

    .vertical-nav {
        flex-direction: column;
        gap: 0.5rem;
        padding-bottom: 0.5rem;
    }

    .vertical-nav a {
        font-size: 1rem;
        padding: 0.8rem 0;
    }

    .vertical-nav a.active::after {
        bottom: 0;
    }

    .about-section {
        padding: 1.5rem;
    }

    .about-section h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .about-text h3 {
        font-size: 1.2rem;
        margin: 1.5rem 0 1rem;
    }
}