/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --background-color: #f8fafc;
    --text-color: #1e293b;
    --sidebar-bg: #1e293b;
    --card-bg: #ffffff;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', 'Arial', sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--background-color);
}

/* 容器布局 */
.container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: 300px;
    background-color: var(--sidebar-bg);
    color: white;
    padding: 2.5rem 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 0 2rem;
    margin-bottom: 3rem;
}

.sidebar-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 0.8rem;
}

.sidebar-menu a {
    display: block;
    padding: 1rem 2rem;
    color: #e2e8f0;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    border-left: 4px solid transparent;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: rgba(255, 255, 255, 0.1);
    border-left-color: var(--primary-color);
    color: white;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 300px;
    padding: 3rem;
    max-width: 1400px;
}

.section {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: 2.5rem;
    transition: var(--transition);
}

.section:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
}

.section h1, .section h2 {
    color: var(--text-color);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

/* 项目卡片样式 */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.project-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.feature-list {
    list-style: none;
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.feature-list li {
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 1.8rem;
    color: #4b5563;
}

.feature-list li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

.project-tags {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: #e0e7ff;
    color: var(--primary-color);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background: #c7d2fe;
    transform: translateY(-1px);
}

/* 联系方式样式 */
.contact-info {
    margin-top: 1.5rem;
}

.contact-info p {
    margin: 1rem 0;
    display: flex;
    align-items: center;
    color: #4b5563;
}

.contact-info i {
    margin-right: 1rem;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* 页脚样式 */
.sidebar-footer {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    padding: 0 20px;
}

.beian-info {
    text-align: center;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.beian-info p {
    margin: 0;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.95);
    letter-spacing: 0.5px;
}

.beian-info a {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 2px 0;
    border-bottom: 1px solid transparent;
}

.beian-info a:hover {
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.6);
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .main-content {
        padding: 2rem;
    }
    
    .project-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 1.5rem 0;
    }

    .sidebar-header {
        margin-bottom: 1.5rem;
    }

    .main-content {
        margin-left: 0;
        padding: 1.5rem;
    }

    .section {
        padding: 1.5rem;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }
}