:root {
            --sidebar-width: 200px;
            --primary-color: #6e6e6e;
            --accent-color: #3498db;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', sans-serif;
            background: #f5f6fa;
        }

        /* 侧边导航栏 */
        .sidebar {
            position: fixed;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary-color);
            padding: 20px;
            transform: translateX(0);
            transition: transform 0.3s ease;
        }

        .nav-list {
            list-style: none;
        }

        .nav-item {
            margin: 15px 0;
            opacity: 0.8;
            transition: all 0.3s ease;
        }

        .nav-item:hover {
            opacity: 1;
            transform: translateX(10px);
        }

        .nav-link {
            color: white;
            text-decoration: none;
            font-size: 1.1em;
        }

        /* 主内容区 */
        .main-content {
            margin-left: var(--sidebar-width);
            padding: 40px;
        }

        /* 项目网格 */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
            padding: 20px;
        }

        /* 项目卡片 */
        .project-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            cursor: pointer;
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }

        .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .card-content {
            padding: 20px;
        }

        .card-title {
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        /* Markdown预览模态框 */
        .md-modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(0,0,0,0.8);
            display: none;
            justify-content: center;
            align-items: center;
        }

        .md-content {
            background: white;
            width: 80%;
            max-width: 800px;
            max-height: 90vh;
            padding: 30px;
            border-radius: 10px;
            overflow-y: auto;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            
            .main-content {
                margin-left: 0;
            }
        }

        /* 新增卡片交互样式 */
.project-card {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 悬停动效 */
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* 点击反馈 */
.project-card:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* 保持原有样式 */
.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px 12px 0 0;
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin: 0;
    color: #333;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .project-card {
        margin-bottom: 1rem;
    }
    
    .card-image {
        height: 150px;
    }
}
        /* 新增底部链接样式 */
        .footer-links {
            max-width: 800px;
            margin: 2rem auto;
            padding: 0 1rem;
            text-align: center;
        }

        .link-buttons {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .link-button {
            display: flex;
            align-items: center;
            padding: 0.8rem 1.2rem;
            border-radius: 25px;
            text-decoration: none;
            transition: transform 0.3s;
            background: #f6f8fa;
            color: #24292e;
            border: 1px solid #e1e4e8;
        }

        .link-button:hover {
            transform: translateY(-3px);
        }

        .link-button i {
            margin-right: 0.5rem;
        }

        /* 不同平台颜色区分 */
        .jlc { color: #0066cc; }
        .bambu { color: #00b894; }
        .github { color: #181717; }

        /* 赞助样式 */
        .sponsor {
            margin-top: 1rem;
            font-size: 0.9em;
            color: #666;
        }
        .sponsor a {
            color: #ff813f;
            text-decoration: none;
            font-weight: 500;
        }
        .sponsor a:hover {
            text-decoration: underline;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .link-buttons {
                flex-direction: column;
                gap: 1rem;
            }
        }