面板问题

html部分

<h1>Lorem ipsum dolor sit, amet consectetur adipisicing.</h1>

<div class="container">
    <div class="faq">
        <div class="title-box">
            <h3 class="title">Lorem, ipsum dolor.</h3>
            <div class="handle">
                <i class="iconfont icon-shangjiantou"></i>
            </div>
        </div>
        <p class="content">
            Lorem, ipsum dolor sit amet consectetur adipisicing elit. Optio, blanditiis et.
            Laudantium cum, atque incidunt expedita sequi doloribus nulla voluptatum eos labore!
        </p>
    </div>
    <div class="faq ">
        <div class="title-box">
            <h3 class="title">Lorem, ipsum dolor.</h3>
            <div class="handle">
                <i class="iconfont icon-shangjiantou"></i>
            </div>
        </div>
        <p class="content">
            Lorem, ipsum dolor sit amet consectetur adipisicing elit. Optio, blanditiis et.
            Laudantium cum, atque incidunt expedita sequi doloribus nulla voluptatum eos labore!
        </p>

    </div>
    <div class="faq ">
        <div class="title-box">
            <h3 class="title">Lorem, ipsum dolor.</h3>
            <div class="handle">
                <i class="iconfont icon-shangjiantou"></i>
            </div>
        </div>
        <p class="content">
            Lorem, ipsum dolor sit amet consectetur adipisicing elit. Optio, blanditiis et.
            Laudantium cum, atque incidunt expedita sequi doloribus nulla voluptatum eos labore!
        </p>
    </div>
</div>

css部分

*{
    margin: 0;
    padding: 0;
}


body{
    display: flex;
    flex-direction: column;
    height: 100vh;
    justify-content: center;
    align-items: center;
}

.container{
    max-width: 600px;
}
.faq{
    background-color: transparent;
    border: 1px solid #9fa4a8;
    border-radius: 10x;
    margin: 20px 0;
    padding: 30px;
    overflow: hidden;
    transform:  0.3s ;
    max-height: 10px;
    transition: all .3s;
}
.faq.active{
    background-color: #fff;
    box-shadow: 0 10px 10px 5px rgba(0, 0, 0, 0.1),
                10px 0 10px 5px rgba(0, 0, 0, 0.1);
    max-height: 200px;
}

.faq.active .handle{
    transform: rotate(180deg);
}
.content{
    padding: 20px;
}

.title-box{
    display: flex;
    justify-content: space-between;
    align-items: center;
}


.handle{
    transition: all .3s;
    cursor: pointer;
}

js部分

// 获取dom对象
const btn=document.querySelectorAll(".handle")

// 点击事件给faq对象添加或移除active类
btn.forEach((item)=>{
    item.addEventListener("click",function(){
    
        item.parentNode.parentNode.classList.toggle("active")
    })
})

效果