/* ===== 学堂页面内容 ===== */
        .section-subtitle {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 50px;
            color: var(--text-light);
            font-size: 1.2rem;
            line-height: 1.8;
        }
        
        /* 课程体系 */
        .courses-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .course-category {
            background: var(--white);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        
        .course-category:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .category-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--light-gray);
        }
        
        .category-icon {
            width: 60px;
            height: 60px;
            background: rgba(46, 125, 50, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 20px;
            font-size: 1.8rem;
            color: var(--primary);
        }
        
        .category-title {
            font-size: 1.8rem;
            color: var(--dark);
        }
        
        .course-list {
            list-style: none;
            margin-bottom: 25px;
        }
        
        .course-list li {
            padding: 12px 0;
            border-bottom: 1px dashed var(--light-gray);
            display: flex;
            justify-content: space-between;
        }
        
        .course-list li:last-child {
            border-bottom: none;
        }
        
        .course-name {
            color: var(--text);
            font-weight: 500;
        }
        
        .course-duration {
            color: var(--text-light);
            font-size: 0.9rem;
            background: rgba(255, 160, 0, 0.1);
            padding: 3px 10px;
            border-radius: 20px;
        }
        
        .view-all {
            display: inline-block;
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            padding: 5px 10px;
            border-radius: 5px;
        }
        
        .view-all:hover {
            background: rgba(46, 125, 50, 0.1);
        }
        
        /* 特色项目 */
        .featured-projects {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .project-card {
            background: var(--white);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            transition: var(--transition);
        }
        
        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .project-image {
            height: 200px;
            overflow: hidden;
        }
        
        .project-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .project-card:hover .project-image img {
            transform: scale(1.05);
        }
        
        .project-content {
            padding: 25px;
        }
        
        .project-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--white);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }
        
        .project-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .project-desc {
            color: var(--text-light);
            margin-bottom: 20px;
            line-height: 1.7;
        }
        
        .project-stats {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--light-gray);
            color: var(--text-light);
        }
        
        /* 关于合绿能学堂模块 */
        .about-academy-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .academy-card {
            background: var(--white);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 40px 30px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        
        .academy-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .academy-icon {
            width: 80px;
            height: 80px;
            background: rgba(46, 125, 50, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 2.5rem;
            color: var(--primary);
            transition: all 0.4s;
        }
        
        .academy-card:hover .academy-icon {
            transform: scale(1.1);
            background: var(--primary);
            color: white;
        }
        
        .academy-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .academy-desc {
            color: var(--text-light);
            line-height: 1.7;
        }
        
        /* 名师讲堂模块 */
        .mentors-section {
            background: linear-gradient(135deg, #1a5e20 0%, #2e7d32 100%);
            color: white;
            padding: 80px 0;
            margin: 40px 0;
        }
        
        .mentors-container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .mentors-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .mentor-card {
            background: rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        
        .mentor-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
            background: rgba(255, 255, 255, 0.15);
        }
        
        .mentor-header {
            display: flex;
            padding: 30px;
            align-items: center;
        }
        
        .mentor-avatar {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            overflow: hidden;
            margin-right: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            flex-shrink: 0;
        }
        
        .mentor-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .mentor-info h3 {
            font-size: 1.6rem;
            margin-bottom: 5px;
        }
        
        .mentor-title {
            color: var(--accent);
            font-weight: 500;
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        
        .mentor-subjects {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 8px;
        }
        
        .subject-tag {
            background: rgba(255, 160, 0, 0.2);
            color: var(--accent);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
        }
        
        .mentor-bio {
            padding: 0 30px 30px;
            font-size: 1rem;
            line-height: 1.7;
            opacity: 0.9;
        }
        
        .mentor-cta {
            margin-top: auto;
            padding: 20px 30px;
            background: rgba(0, 0, 0, 0.15);
            text-align: center;
        }
        
        .mentor-cta a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .mentor-cta a:hover {
            color: var(--accent);
        }
        
        /* 学员见证 */
        .testimonials-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }
        
        .testimonial-card {
            background: var(--white);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 30px;
            position: relative;
            transition: var(--transition);
        }
        
        .testimonial-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .testimonial-quote {
            font-size: 3rem;
            color: rgba(46, 125, 50, 0.1);
            position: absolute;
            top: 10px;
            left: 20px;
        }
        
        .testimonial-content {
            margin-top: 20px;
            margin-bottom: 30px;
            color: var(--text);
            line-height: 1.8;
            font-style: italic;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid var(--light-gray);
        }
        
        .author-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            overflow: hidden;
            margin-right: 15px;
        }
        
        .author-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .author-info h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
        }
        
        .author-position {
            color: var(--text-light);
            font-size: 0.9rem;
        }