为什么VScode里面bootstrap不好用?

html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    
    
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
    <title>Documenttitle>
    <style>
        [class^="col"] {
            border: 1px solid #ccc;
        }
        
        .row:nth-child(1) {
            background-color: pink;
        }
    style>
head>

<body>
    <div class="container">
        <div class="row">
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">1div>
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">2div>
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">3div>
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">4div>
        div>
        
        <div class="row">
            <div class="col-lg-6">1div>
            <div class="col-lg-2">2div>
            <div class="col-lg-2">3div>
            <div class="col-lg-2">4div>
        div>
        
        <div class="row">
            <div class="col-lg-6">1div>
            <div class="col-lg-2">2div>
            <div class="col-lg-2">3div>
            <div class="col-lg-1">4div>
        div>
        

        <div class="row">
            <div class="col-lg-6">1div>
            <div class="col-lg-2">2div>
            <div class="col-lg-2">3div>
            <div class="col-lg-3">4div>
        div>


    div>
body>

html>html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    
    
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
    <title>Documenttitle>
    <style>
        [class^="col"] {
            border: 1px solid #ccc;
        }
        
        .row:nth-child(1) {
            background-color: pink;
        }
    style>
head>

<body>
    <div class="container">
        <div class="row">
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">1div>
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">2div>
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">3div>
            <div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">4div>
        div>
        
        <div class="row">
            <div class="col-lg-6">1div>
            <div class="col-lg-2">2div>
            <div class="col-lg-2">3div>
            <div class="col-lg-2">4div>
        div>
        
        <div class="row">
            <div class="col-lg-6">1div>
            <div class="col-lg-2">2div>
            <div class="col-lg-2">3div>
            <div class="col-lg-1">4div>
        div>
        

        <div class="row">
            <div class="col-lg-6">1div>
            <div class="col-lg-2">2div>
            <div class="col-lg-2">3div>
            <div class="col-lg-3">4div>
        div>


    div>
body>

html>

出来是：

想要得到的是：

Bootstrap本来就已经过时了，可以用Foundation、Zimit、InK、HTML KickStart、Kickstrap、Pure等替代。
如果对你有帮助，还请帮忙点个采纳，谢谢！

bootstarp 引入成功了吗？看起来别难过没有引入成功

你样式引入的有问题，我复制过来运行是可以的


  <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.2.0/css/bootstrap.min.css" rel="stylesheet">

你可以试一下