效果图如下：

具体代码如下：

<template>
  <div class="box">
    <div class="title">
      <img src="" alt class="logo" />
      <span class="title-hn">AI人工智能</span>
    </div>
    <div id="content" class="content">
      <div v-for="(item,index) in info" :key="index">
        <div class="info_r info_default" v-if="item.type == 'leftinfo'">
          <span class="circle circle_r"></span>
          <div class="con_r con_text">
            <div>{{item.content}}</div>
            <div v-for="(item2,index) in item.question" :key="index">
              <div class="con_que" @click="clickRobot(item2.content,item2.id)">
                <div class="czkj-question-msg">
                  {{item2.index}}
                  {{item2.content}}
                </div>
              </div>
            </div>
          </div>
          <div class="time_r">{{item.time}}</div>
        </div>
        <div class="info_l" v-if="item.type == 'rightinfo'">
           <span class="circle circle_l">
              <img src class="pic_l" />
            </span>
          <div class="con_r con_text rightconbox">
            {{item.content}}
           
          </div>
          <div class="time_l">{{item.time}}</div>
        </div>
      </div>
    </div>
    <div class="setproblem">
      <textarea
        placeholder="请输入您的问题..."
        style="height: 68px;width: 100%;resize:none;padding-right:80px;outline: none;border-color:#ccc;border-radius:5px;"
        id="text"
        v-model="customerText"
        @keyup.enter="sentMsg()"
      ></textarea>
      <el-button @click="sentMsg()" class="buttonsend">
        <span style="vertical-align: 4px;">发送</span>
      </el-button>
    </div>
  </div>
</template>
<script>
export default {
data() {
  return {
    customerText: "",
    info: [
      {
        type: 'leftinfo',
        time: this.getTodayTime(),
        name: "robot",
        content:"您好，欢迎使用!",
        question: [
      { id: 1, content: "客户资料完善后是由谁来审批", index: 1 },
      { id: 2, content: "客户资料审批一直不通过", index: 2 },
      { id: 3, content: "客户资料审批需要多长时间", index: 3 },
      {id: 4,content: "注册网站时需要一次填写完所有的客户资料吗",index: 4 },
      { id: 5, content: "注册时使用的手机号变更怎么办", index: 5 }
  ]
      }
    ],
    timer: null,
    robotQuestion: [
      { id: 1, content: "客户资料完善后是由谁来审批", index: 1 },
      { id: 2, content: "客户资料审批一直不通过", index: 2 },
      { id: 3, content: "客户资料审批需要多长时间", index: 3 },
      { d: 4, content: "注册网站时需要一次填写完所有的客户资料吗", index: 4 },
      { id: 5, content: "注册时使用的手机号变更怎么办", index: 5 },
    ],
    robotAnswer: [
      { id: 1,content:"答案客户资料完善后是由谁来审批,答案客户资料完善后是由谁来审批,答案客户资料完善后是由谁来审批",index: 1},
      { id: 2, content: "测试", index: 2 },
      { id: 3, content: "测试", index: 3 },
      { id: 4,content: "3333333",index: 4 },
      { id: 5, content: "44444444", index: 5 },
    ]
  }
},
created() {
  this.showTimer();
},
methods: {
  // 用户发送消息
  sentMsg() {
    clearTimeout(this.timer)
    this.showTimer()
    let text = this.customerText.trim()
    if (text != '') {
      var obj = {
        type: 'rightinfo',
        time: this.getTodayTime(),
        content: text,
      }
      this.info.push(obj)
      this.appendRobotMsg(this.customerText)
      this.customerText = ''
      this.$nextTick(() => {
        var contentHeight = document.getElementById('content')
        contentHeight.scrollTop = contentHeight.scrollHeight
      })
    }
  },
  // 机器人回答消息
  appendRobotMsg(text) {
    clearTimeout(this.timer)
    this.showTimer()
    text = text.trim()
    let answerText = ''
    let flag;
    for (let i = 0; i < this.robotAnswer.length; i++) {
      if (this.robotAnswer[i].content.indexOf(text) != -1) {
        flag = true
        answerText = this.robotAnswer[i].content
        break
      }
    }
    if (flag) {
      let obj = {
        type: "leftinfo",
        time: this.getTodayTime(),
        name: "robot",
        content: answerText,
        question: [],
      }
      this.info.push(obj)
    } else {
      answerText = "您可能想问："
      let obj = {
        type: 'leftinfo',
        time: this.getTodayTime(),
        name: "robot",
        content: answerText,
        question: this.robotQuestion,
      }
      this.info.push(obj)
    }
    this.$nextTick(() => {
      var contentHeight = document.getElementById('content')
      contentHeight.scrollTop = contentHeight.scrollHeight
    })
  },
  sentMsgById(val, id) {
    clearTimeout(this.timer)
    this.showTimer()
    let robotById = this.robotAnswer.filter((item) => {
      return item.id == id;
    })
    let obj_l = {
      type: 'leftinfo',
      time: this.getTodayTime(),
      name: 'robot',
      content: robotById[0].content,
      question: [],
    };
    let obj_r = {
      type: 'rightinfo',
      time: this.getTodayTime(),
      name: 'robot',
      content: val,
      question: [],
    };
    this.info.push(obj_r)
    this.info.push(obj_l)
    this.$nextTick(() => {
      var contentHeight = document.getElementById('content')
      contentHeight.scrollTop = contentHeight.scrollHeight
    })
  },
  // 点击机器人的单个问题
  clickRobot(val, id) {
    this.sentMsgById(val, id)
  },
  // 结束语
  endMsg() {
    let happyEnding = {
      type: 'leftinfo',
      time: this.getTodayTime(),
      content: "退出",
      question: [],
    };
    this.info.push(happyEnding)
    this.$nextTick(() => {
      var contentHeight = document.getElementById('content')
      contentHeight.scrollTop = contentHeight.scrollHeight
    })
  },
  showTimer() {
    this.timer = setTimeout(this.endMsg, 1000*60)
  },
  getTodayTime() {
    // 获取当前时间
    var day = new Date()
    let seconds = day.getSeconds()
    if (seconds < 10) {
      seconds = "0" + seconds
    } else {
      seconds = seconds
    }
    let minutes = day.getMinutes()
    if (minutes < 10) {
      minutes = "0" + minutes
    } else {
      minutes = minutes
    }
    let time =
      day.getFullYear() +
      "-" +
      (day.getMonth() + 1) +
      "-" +
      day.getDate() +
      " " +
      day.getHours() +
      ":" +
      minutes +
      ":" +
      seconds
    return time
  }
}
}
</script>
<style scoped>
.box {
  width: 100%;
  height: 500px;
  background-color: #fafafa;
  position: relative;
  padding: 20px;
}
.title {
  margin-bottom: 20px;
}
.title-hn {
  background: rgba(22, 68, 124, 0.8);
  color: #ffffff;
  padding: 10px;
  border: 2px solid rgba(31, 159, 191, 0.9);
  border-radius: 10px;
}
  #content {
    height: 340px;
    overflow-y: scroll;
    font-size: 14px;
    width: 100%;
  }
  .circle {
    /* color: #ffffff;
    margin: 0 30px;
    padding: 16px 20px;
    border: 2px solid #2da8f0;
    border: 2px solid rgba(31, 159, 191, 0.9);
    border-radius: 10px;
    background: rgba(22, 68, 124, 0.8);
    background: linear-gradient(0deg, #125eab 0%, #3a94f4 100%);
    line-height: 30px;
    width: 34px;
    height: 34px; */
    display: inline-block;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background-color: #ff9640;
  }
  .con_text {
    color: #333;
    margin-bottom: 5px;
  }
  .con_que {
    color: #1c88ff;
    height: 30px;
    line-height: 30px;
    cursor: pointer;
  }
  .info_r {
    position: relative;
  }
  .circle_r {
    position: absolute;
    left: 0%;
  }
  .pic_r {
    width: 17px;
    height: 17px;
    margin: 8px;
  }
  .con_r {
    display: inline-block;
    min-height: 55px;
    margin: 0 30px;
    padding: 16px 20px;
    border: 2px solid #2da8f0;
    border: 2px solid rgba(31, 159, 191, 0.9);
    border-radius: 10px;
    background: rgba(22, 68, 124, 0.8);
    background: linear-gradient(0deg, #125eab 0%, #3a94f4 100%);
    line-height: 30px;
    margin-left: 40px;
    color: #fff;
  }
  .time_r {
    margin-left: 45px;
    color: #999999;
    font-size: 12px;
  }
  .info_l {
    position: relative;
    text-align: right;
    color: #ffffff;
    color: #3163C5;
    margin-top: 10px;
  }

  .circle_l {
      position: absolute;
      right: 0%;
  }
  .rightconbox {
    margin-right: 40px;
  }
  .pic_l {
    width: 13px;
    height: 17px;
    margin: 8px 10px;
  }
  .time_l {
    margin-right: 45px;
    color: #999999;
    font-size: 12px;
    margin-top: 5px;
  }
  #question {
    cursor: pointer;
  }
.setproblem {
  width: 90%;
  height: 68px;
  background-color: #ffffff;
  position: relative;
  margin-top: 20px;
  padding-bottom: 20px;
}
.setproblem textarea {
  margin-bottom: 10px;
  color: #999999;
  padding: 10px;
  box-sizing: border-box;
}
.buttonsend {
  background: #3163C5;
  opacity: 1;
  border-radius: 4px;
  font-size: 10px;
  color: #ffffff;
  position: absolute;
  right: -10%;
  top: 30%;
  cursor: pointer;
  border: none;
}

.czkj-item-title {
line-height: 25px;
border-bottom: 1px solid #ccc;
padding-bottom: 5px;
margin-bottom: 5px;
}

.czkj-item-question {
cursor: pointer;
display: block;
padding: 8px;
position: relative;
border-bottom: 1px dashed #ccc;
line-height: 20px;
min-height: 20px;
overflow: hidden;
}

.czkj-question-msg {
float: left;
font-size: 14px;
color: #31c589;
}
</style>