/* 关于我们区域响应式优化 - 去除背景框 */
#about-us {
    padding: 100px 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%);
    position: relative;
}

#about-us::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 255, 159, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.about-content {
    position: relative;
    z-index: 2;
}

.about-description {
    text-align: center;
    margin-bottom: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
}

.about-intro {
    font-size: 18px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    font-weight: 300;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 60px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 移除团队区域的背景框 */
.team-section {
    /* 移除所有背景相关属性 */
    padding: 20px 0;
    transition: all 0.3s ease;
}

.team-section:hover {
    /* 简化悬停效果，只保留轻微的变换 */
    transform: translateY(-2px);
}

.team-section h3 {
    font-size: 28px;
    color: #00ff9f;
    margin-bottom: 30px;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    text-align: center;
    position: relative;
}

.team-section h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, #00ff9f, #00d4ff);
}

/* 技术栈样式 - 去除背景 */
.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 20px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 25px 20px;
    /* 移除背景和边框 */
    border-radius: 10px;
    transition: all 0.3s ease;
    min-height: 120px;
}

.tech-item:hover {
    /* 简化悬停效果 */
    transform: translateY(-3px);
}

.tech-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 255, 159, 0.2);
}

.tech-icon.python {
    background: linear-gradient(135deg, #3776ab, #ffd43b);
}

.tech-icon.ai {
    background: linear-gradient(135deg, #ff6b6b, #4ecdc4);
}

.tech-icon.mobile {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.tech-icon.web {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.tech-icon::before {
    content: '⚙';
    font-size: 24px;
}

.tech-icon.python::before { content: '🐍'; }
.tech-icon.ai::before { content: '🤖'; }
.tech-icon.mobile::before { content: '📱'; }
.tech-icon.web::before { content: '🌐'; }

.tech-item span {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    text-align: center;
    line-height: 1.2;
}

/* 团队统计样式 - 去除背景 */
.team-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
    padding: 25px 20px;
    /* 移除背景和边框 */
    border-radius: 10px;
    transition: all 0.3s ease;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stat-item:hover {
    /* 简化悬停效果 */
    transform: translateY(-2px);
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: #00ff9f;
    margin-bottom: 8px;
    font-family: 'Orbitron', monospace;
    text-shadow: 0 0 10px rgba(0, 255, 159, 0.3);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.2;
}

/* QPython信息区域 - 保留但简化 */
.qpython-info {
    background: linear-gradient(135deg, rgba(0, 255, 159, 0.05), rgba(0, 212, 255, 0.05));
    border: 1px solid rgba(0, 255, 159, 0.2);
    border-radius: 15px;
    padding: 30px;
    margin-top: 30px;
    backdrop-filter: blur(5px);
}

.qpython-info h4 {
    font-size: 22px;
    color: #00ff9f;
    margin-bottom: 18px;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    text-shadow: 0 0 8px rgba(0, 255, 159, 0.3);
}

.qpython-info p {
    font-size: 16px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* 平板端适配 */
@media screen and (max-width: 1024px) {
    #about-us {
        padding: 80px 0;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        gap: 50px;
        max-width: 600px;
    }
    
    .about-intro {
        font-size: 16px;
    }
    
    .team-section h3 {
        font-size: 24px;
    }
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
    #about-us {
        padding: 60px 0;
    }
    
    .about-description {
        margin-bottom: 40px;
        padding: 0 15px;
    }
    
    .about-intro {
        font-size: 15px;
        line-height: 1.6;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 15px;
    }
    
    .team-section:first-child {
        order: 1;
    }
    
    .team-section:last-child {
        order: 2;
    }
    
    .team-section {
        padding: 15px 0;
    }
    
    .team-section h3 {
        font-size: 22px;
        margin-bottom: 25px;
    }
    
    /* 移动端技术栈 */
    .tech-stack {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .tech-item {
        padding: 20px 15px;
        gap: 10px;
        min-height: 100px;
    }
    
    .tech-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .tech-item span {
        font-size: 14px;
    }
    
    /* 移动端统计数据 */
    .team-stats {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-bottom: 30px;
    }
    
    .stat-item {
        padding: 20px;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        text-align: left;
        min-height: auto;
    }
    
    .stat-number {
        font-size: 24px;
        margin-bottom: 0;
    }
    
    .stat-label {
        font-size: 12px;
        text-align: right;
    }
    
    .qpython-info {
        padding: 25px;
        margin-top: 25px;
    }
    
    .qpython-info h4 {
        font-size: 18px;
        margin-bottom: 15px;
    }
    
    .qpython-info p {
        font-size: 14px;
        line-height: 1.6;
    }
}

/* 超小屏幕适配 */
@media screen and (max-width: 480px) {
    .team-section h3 {
        font-size: 20px;
        margin-bottom: 20px;
    }
    
    .tech-stack {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .tech-item {
        flex-direction: row;
        justify-content: flex-start;
        padding: 15px 0;
        text-align: left;
        min-height: auto;
    }
    
    .tech-icon {
        width: 35px;
        height: 35px;
        margin-right: 15px;
        flex-shrink: 0;
    }
    
    .tech-item span {
        font-size: 15px;
        text-align: left;
    }
    
    .stat-item {
        padding: 15px 0;
    }
    
    .stat-number {
        font-size: 20px;
    }
    
    .qpython-info {
        padding: 20px;
    }
    
    .qpython-info h4 {
        font-size: 16px;
    }
    
    .qpython-info p {
        font-size: 13px;
    }
}