有人可以解释这些错误和警告的含义以及如何修复它以便CSS可以被验证吗？

尽管存在这些错误,我的应用程序仍能正

这是我的CSS代码：

/*----------------------------CSS reset------------------------------*/

html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}


/* HTML5 display-role reset for older browsers */

article,section {
    display: block;
}

body {
    line-height: 1;
}

ol,ul {
    list-style: none;
}

blockquote,q {
    quotes: none;
}

blockquote:before,blockquote:after,q:before,q:after {
    content: '';
    content: none;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

/*-----------App wrapper-----------*/
#wrapper {
  padding-left: 1em;
  padding-right: 1em;
}

/*-----------App description-----------*/

h1 {
  font-size: 24px;
  font-family: helvetica;
  font-weight: bold;
  text-align: center;
  padding-top: 1em;
  padding-bottom: 1em;
}

p {
  font-size: 16px;
  font-family: helvetica;
  text-align:justify;
  line-height: 1.2;
}
/*-----------Select menu-----------*/

#input {
  padding-top: 1em;
  padding-bottom: 1em;
}

#search_button,label select {
  padding: 10px 10px 10px 10px;
    background: #f8f8f8;
    color: #444;
    border: 1px solid black;
    border-radius: 0;
    display: inline-block;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    cursor: pointer;
    outline: none;
  font-family: helvetica;
  font-size: 13px;
}

#search_button,label select:-moz-focusring {
    color: transparent;
    text-shadow: 0 0 0 #444;
}

#search_button,label select::-ms-expand {
    display: none;
}

label:before {
    content: '';
    right: 5px;
    top: -7px;
    width: 30px;
    height: 33px;
    background: #f8f8f8;
    position: absolute;
    pointer-events: none;
    display: block;
}

label { position: relative; }

label:after {
    content: '>';
    font: 16px helvetica,monospace;
    color: #444;
    -webkit-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
    transform: rotate(90deg);
    right: 2px;
    top: -3px;
    border-bottom: 1px solid #aaa;
    position: absolute;
    pointer-events: none;
    width: 35px;
    padding: 0 0 5px 0;
    text-indent: 14px;
}

/*-----------Crest,Name-----------*/
#output {
  display: -webkit-Box;      /* OLD - iOS 6-,Safari 3.1-6 */
  display: -moz-Box;         /* OLD - Firefox 19- (buggy but mostly works) */
  display: -ms-flexBox;      /* TWEENER - IE 10 */
  display: -webkit-flex;     /* NEW - Chrome */
  display:flex;
  max-height: 70px;
}

#crest {
  max-height: 70px;
  max-width: 70px;
}

img {
  max-height: 100%;
  float: left;
}

#team-name {
  width: 100%;
}

h2 {
  font-size: 17px;
  font-family: helvetica;
  font-weight: bold;
  text-align: center;
  vertical-align: middle;
  line-height: 70px;
}

/*-----------Geochart container-----------*/


/*-----------Pie chart container-----------*/
  #pie-container {
      display: block;
  }
/*----------------------------Tablet responsive----------------------------*/
@media all and (min-width: 700px) {



  /*-----------App decription-----------*/
  h1 {
    font-size: 50px;
  }

  p {
    font-size: 16px;
  }

  /*-----------Crest,Name-----------*/
  #output {
    max-height: 120px;
  }

  #crest {
    max-height: 120px;
    max-width: 120px;
  }


  h2 {
    font-size: 38px;
    line-height: 120px;
  }
}
/*----------------------------Desktop responsive----------------------------*/

@media all and (min-width: 900px) {

  /*-----------App wrapper-----------*/
  #wrapper {
    padding-left: 5em;
    padding-right: 5em;
  }

  /*-----------App decription-----------*/

  h1 {
    font-size: 60px;
  }

  p {
    font-size: 18px;

  }

  /*-----------Crest,Name-----------*/
  #output {
    max-height: 160px;
  }

  #crest {
    max-height: 160px;
    max-width: 160px;
  }


  h2 {
    font-size: 40px;
    line-height: 160px;
  }

  /*-----------Pie chart container-----------*/
    #pie-container {
      display: -webkit-Box;      /* OLD - iOS 6-,Safari 3.1-6 */
      display: -moz-Box;         /* OLD - Firefox 19- (buggy but mostly works) */
      display: -ms-flexBox;      /* TWEENER - IE 10 */
      display: -webkit-flex;     /* NEW - Chrome */
      display:flex;
    }
    #countryPie {
        flex: 1;
    }
    #playerPie {
        flex: 1;
    }
}

谢谢你的帮助！