/* ========== 关于我们页面专用样式 ========== */

/* 页面头部 */
.page-header {
    background: linear-gradient(135deg, #1a2c42 0%, #2c3e50 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, transparent 48%, rgba(52, 152, 219, 0.05) 50%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, rgba(52, 152, 219, 0.05) 50%, transparent 52%);
    background-size: 30px 30px;
    opacity: 0.5;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
    position: relative;
    z-index: 1;
    font-family: 'Montserrat', 'Inter', sans-serif;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

/* 关于内容区域 */
.about-content {
    padding: 60px 0;
    background-color: white;
}

.about-section {
    margin-bottom: 50px;
}

.about-section h2 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 20px;
    border-left: 4px solid #3498db;
    padding-left: 15px;
}

.about-section p {
    line-height: 1.8;
    color: #555;
    margin-bottom: 15px;
}

/* 技术栈样式 */
.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.tech-category {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tech-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.tech-category h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.3rem;
    font-weight: 600;
}

.tech-category ul {
    list-style: none;
    padding: 0;
}

.tech-category li {
    padding: 8px 0;
    color: #555;
    padding-left: 20px;
    position: relative;
    transition: color 0.3s ease;
}

.tech-category li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: #3498db;
    font-weight: bold;
}

.tech-category li:hover {
    color: #2c3e50;
}

/* 服务优势样式 */
.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.advantage-item {
    text-align: center;
    padding: 30px 20px;
    background-color: #f8f9fa;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e8e8e8;
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    background-color: white;
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.advantage-item h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.advantage-item p {
    color: #7f8c8d;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .tech-stack {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 25px;
    }
    
    .advantages {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 40px 0;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .about-content {
        padding: 40px 0;
    }
    
    .about-section h2 {
        font-size: 1.6rem;
    }
    
    .tech-stack {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .tech-category {
        padding: 20px;
    }
    
    .advantages {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
    }
    
    .advantage-item {
        padding: 25px 15px;
    }
    
    .advantage-icon {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 1.8rem;
    }
    
    .about-section h2 {
        font-size: 1.4rem;
        padding-left: 12px;
    }
    
    .about-section h2::before {
        width: 3px;
    }
    
    .tech-category h3 {
        font-size: 1.1rem;
    }
    
    .advantages {
        grid-template-columns: 1fr;
    }
    
    .advantage-item {
        padding: 20px;
    }
}