/* 左侧菜单栏 */
.sidebar {
    width: 240px;
    background-color: #0a192e;
    color: white;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.sidebar-header {
    padding: 30px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
    font-size: 20px;
    font-weight: 600;
    color: white;
}

.sidebar-menu {
    flex: 1;
    padding: 20px 0;
}

.menu-item {
    padding: 15px 20px;
    cursor: pointer;
    transition: all 0.3s;
    color: rgba(255,255,255,0.7);
    font-size: 15px;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background-color: rgba(255,255,255,0.05);
    color: white;
}

.menu-item.active {
    background-color: rgba(255,255,255,0.1);
    color: white;
    border-left-color: #007bff;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
}