:root {
            --primary-green: #198754;
            --secondary-green: #2e8b57;
            --light-green: #e9f5e9;
        }

        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            padding-top: 76px; /* 为固定导航栏留出空间 */
        }

        .navbar {
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .navbar-brand {
            font-weight: bold;
            font-size: 1.5rem;
        }

        /* 语言切换器样式 - 简化版 */
        .language-switcher {
            margin-left: 15px;
        }

        .language-switcher .dropdown-toggle {
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-radius: 4px;
            padding: 5px 10px;
            background-color: rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
        }

        .language-switcher .dropdown-toggle:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }

        .language-switcher .dropdown-menu {
            min-width: 120px;
        }

        /* 导航栏下拉菜单样式优化 */
        .dropdown-menu {
            border: 1px solid rgba(0,0,0,0.1);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-top: 3px solid var(--primary-green);
        }

        .dropdown-item {
            padding: 8px 20px;
            transition: all 0.2s ease;
        }

        .dropdown-item:hover {
            background-color: rgba(25, 135, 84, 0.1);
            color: var(--primary-green);
        }

        .dropdown-item.active, .dropdown-item:active {
            background-color: var(--primary-green);
            color: white;
        }

        .dropdown-divider {
            border-top: 1px solid #dee2e6;
        }

        /* 可点击卡片样式优化 */
        .card-link {
            text-decoration: none;
            color: inherit;
            display: block;
            transition: all 0.3s ease;
        }

        .card-link:hover {
            text-decoration: none;
        }

        .card-link:hover .card {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
            border-color: var(--primary-green);
        }

        .card {
            border: 1px solid #dee2e6;
            transition: all 0.3s ease;
            overflow: hidden;
        }

        .card-img-container {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

        .card-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .card-link:hover .card-img {
            transform: scale(1.05);
        }

        .card-header {
            background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
            font-weight: 600;
            font-size: 1.1rem;
        }

        /* 年份切换按钮样式 */
        .year-switcher {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin: 15px 0;
            flex-wrap: wrap;
        }

        .year-btn {
            padding: 6px 15px;
            border: 2px solid var(--primary-green);
            background-color: white;
            color: var(--primary-green);
            border-radius: 20px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .year-btn:hover {
            background-color: rgba(25, 135, 84, 0.1);
        }

        .year-btn.active {
            background-color: var(--primary-green);
            color: white;
        }

        /* 轮播图样式优化 */
        .carousel-item {
            height: 400px;
        }

        .carousel-caption {
            background: rgba(0, 0, 0, 0.6);
            border-radius: 10px;
            padding: 20px;
            bottom: 50px;
        }

        /* 实验室简介区域优化 */
        .lab-intro {
            background-color: var(--light-green);
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }

        .lab-intro h2 {
            color: var(--primary-green);
            position: relative;
            padding-bottom: 15px;
        }

        .lab-intro h2:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 3px;
            background-color: var(--primary-green);
        }

        .publication-list {
            max-height: 300px;
            overflow-y: auto;
            padding-right: 10px;
        }

        .publication-list::-webkit-scrollbar {
            width: 6px;
        }

        .publication-list::-webkit-scrollbar-thumb {
            background-color: var(--primary-green);
            border-radius: 3px;
        }

        .publication-list li {
            margin-bottom: 12px;
            padding-left: 10px;
            border-left: 3px solid #e9ecef;
            transition: all 0.3s ease;
        }

        .publication-list li:hover {
            border-left-color: var(--primary-green);
            background-color: rgba(25, 135, 84, 0.05);
        }

        /* 页脚样式 */
        footer {
            background-color: #2c3e50;
            color: white;
            margin-top: 50px;
        }

        .social-icons a {
            color: white;
            font-size: 1.2rem;
            margin: 0 10px;
            transition: color 0.3s;
        }

        .social-icons a:hover {
            color: var(--primary-green);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .carousel-item {
                height: 300px;
            }

            .card-img-container {
                height: 180px;
            }

            .lab-intro {
                padding: 20px 15px;
            }

            .year-switcher {
                gap: 5px;
            }

            .year-btn {
                padding: 5px 12px;
                font-size: 0.9rem;
            }

            .language-switcher {
                margin-left: 0;
                margin-top: 10px;
                width: 100%;
            }

            .language-switcher .dropdown-toggle {
                width: 100%;
                text-align: left;
            }

            /* 移动端下拉菜单优化 */
            .dropdown-menu {
                border: none;
                box-shadow: none;
                background-color: rgba(255,255,255,0.1);
            }

            .dropdown-item {
                padding-left: 30px;
            }
        }