/* 研究方向页面样式 */

.research-section {
    padding: 60px 0 80px;
    background: var(--bg-white);
}

.main-title {
    text-align: center;
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 600;
    line-height: 1.6;
}

.section-subtitle {
    text-align: center;
    color: var(--text-medium);
    font-size: 1.1rem;
    margin-top: 15px;
}

/* 研究方向列表 */
.research-item {
    display: flex;
    gap: 40px;
    margin-bottom: 60px;
    padding: 40px;
    background: var(--bg-white);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.research-item:hover {
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    transform: translateY(-5px);
}

.research-item:last-child {
    margin-bottom: 0;
}

/* 研究编号 */
.research-number {
    font-size: 4rem;
    font-weight: 700;
    color: var(--accent-color);
    opacity: 0.2;
    line-height: 1;
    min-width: 100px;
    text-align: center;
    padding-top: 10px;
}

/* 研究内容 */
.research-content {
    flex: 1;
}

.research-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--accent-color);
}

.research-icon {
    font-size: 3rem;
}

.research-header h2 {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin: 0;
    font-weight: 600;
}

/* 研究主体内容 */
.research-body {
    line-height: 1.9;
}

.research-body h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-top: 25px;
    margin-bottom: 15px;
    font-weight: 600;
}

.research-body h3:first-child {
    margin-top: 0;
}

.research-body p {
    color: var(--text-dark);
    font-size: 1rem;
    margin-bottom: 20px;
    text-align: justify;
}

/* 研究亮点 */
.research-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 25px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: var(--bg-white);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-dark);
}

.highlight-item i {
    color: var(--accent-color);
    font-size: 1rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .research-item {
        flex-direction: column;
        gap: 20px;
    }
    
    .research-number {
        min-width: auto;
        text-align: left;
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .research-section {
        padding: 40px 0 60px;
    }
    
    .research-item {
        padding: 25px;
        margin-bottom: 40px;
    }
    
    .research-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .research-header h2 {
        font-size: 1.5rem;
    }
    
    .research-icon {
        font-size: 2.5rem;
    }
    
    .research-body h3 {
        font-size: 1.2rem;
    }
    
    .research-highlights {
        flex-direction: column;
        gap: 10px;
    }
    
    .highlight-item {
        padding: 8px 15px;
    }
}

@media (max-width: 480px) {
    .research-item {
        padding: 20px;
    }
    
    .research-number {
        font-size: 2.5rem;
    }
    
    .research-header h2 {
        font-size: 1.3rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}