body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    height: 100vh;
}

.container {
    display: flex;
    width: 100%;
}

.sidebar {
    width: 20%;
    background-color: #f4f4f4;
    padding: 10px;
    box-sizing: border-box;
    overflow-y: auto;
}

.content {
    width: 80%;
    padding: 10px;
    box-sizing: border-box;
}

ul#tree {
    list-style-type: none;
    padding-left: 20px;
}

ul#tree > li {
    cursor: default; /* 确保domain不变色 */
    font-weight: bold; /* domain字体加粗 */
    background: linear-gradient(to right, #e0e0e0, #f4f4f4); /* 渐变背景 */
    padding: 5px;
    margin-bottom: 5px;
}

ul#tree > li > ul > li {
    cursor: pointer;
    padding: 5px;
    transition: all 0.3s; /* 添加过渡效果 */
}

ul#tree > li > ul > li:hover {
    background-color: #ffa500; /* 橘黄色背景 */
    font-size: 1.1em; /* 字体变大 */
}

.context-menu {
    position: absolute;
    background-color: white;
    border: 1px solid #ccc;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.context-menu-item {
    padding: 8px 12px;
    cursor: pointer;
}

.context-menu-item:hover {
    background-color: #f0f0f0;
}