/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

.demo-item {
    margin-bottom: 30px;
    padding: 20px;
    border: 1px solid #eee;
    border-radius: 4px;
}

h3 {
    margin-bottom: 15px;
    color: #333;
}

/* 宽高演示区域 */
.size-demo {
    background-color: #f0f0f0;
    text-align: center;
    line-height: 200px;
}

/* 动画演示区域 */
.animate-demo {
    background-color: #ffd700;
    width: 100px;
    height: 100px;
    line-height: 100px;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s;
}

.animate-demo:hover {
    background-color: #ffc700;
}

/* 数组遍历演示区域 */
.array-demo {
    padding: 10px;
    background-color: #f8f8f8;
}

/* 深拷贝演示区域 */
.clone-demo pre {
    padding: 10px;
    background-color: #f8f8f8;
    margin: 5px 0;
}

/* 表单演示区域 */
.form-demo input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.form-tip {
    margin-top: 5px;
    color: #ff4444;
    font-size: 14px;
}