ant-design/style/components/tree.less

@treePrefixCls: ant-tree;

.@{treePrefixCls} {
  margin:0; padding:5px;

  li {
    padding: 0;
    margin: 0;
    list-style: none;
    line-height: 14px;
    white-space: nowrap;
    outline: 0;

    ul{ margin:0; padding:0 0 0 18px}
    ul.line{
      //background:url(./img/line_conn.gif) 0 0 repeat-y;
      background:url(https://t.alipayobjects.com/images/T13BtfXl0mXXXXXXXX.gif) 0 0 repeat-y;
    }
    a {
      padding:1px 3px 0 0; margin:0;
      cursor:pointer; height:17px;
      background-color: transparent;
      text-decoration:none;
      vertical-align:top; display: inline-block
    }
    span {line-height:16px; margin-right:2px}
    span.button {
      line-height:0; margin:0; width:16px; height:16px;
      display: inline-block; vertical-align:middle;
      border:0 none; cursor: pointer;outline:none;
      background-color:transparent; background-repeat:no-repeat; background-attachment: scroll;
      //background-image:url("./img/zTreeStandard.png");
      background-image:url("https://t.alipayobjects.com/images/T1NcthXkFdXXXXXXXX.png");
    }
    span.button.roots_open {  background-position: -92px 0;  }
    span.button.roots_close{background-position:-74px 0}
    span.button.center_open{background-position:-92px -18px}
    span.button.center_close{background-position:-74px -18px}
    span.button.bottom_open{background-position:-92px -36px}
    span.button.bottom_close{background-position:-74px -36px}
    span.button.noline_open{background-position:-92px -72px}
    span.button.noline_close{background-position:-74px -72px}

    span.button.chk {
      width: 15px;  height: 16px;
      // margin: 0 3px 0 0;
      margin: 3px 5px 0 3px;
      cursor: auto;
    }
    span.button.chk.checkbox_false_full {background-position:0 0}
    span.button.chk.checkbox_false_full:hover {background-position:0 -15px}
    span.button.chk.checkbox_false_full_focus {background-position:0 -14px}
    span.button.chk.checkbox_false_part {background-position:0 -28px}
    span.button.chk.checkbox_false_part_focus {background-position:0 -42px}
    span.button.chk.checkbox_false_disable {background-position:0 -56px}
    span.button.chk.checkbox_true_full {background-position:-15px 0}
    span.button.chk.checkbox_true_full:hover {background-position:-15px -15px}
    span.button.chk.checkbox_true_full_focus {background-position:-14px -14px}
    span.button.chk.checkbox_true_part {background-position:-14px -30px}
    span.button.chk.checkbox_true_part_focus {background-position:-14px -42px}
    span.button.chk.checkbox_true_disable {background-position:-14px -56px}
  }

  /*&-selected{
    background-color:#FFE6B0;
    border:1px #FFB951 solid; opacity:0.8;
  }*/

  &-treenode-switcher {
    display: inline-block;
    width: 18px;
    height: 18px;
  }
  &-icon__open {
    margin-right: 2px;
    background-position: -110px -16px;
    vertical-align: top;
  }
  &-icon__close {
    margin-right: 2px;
    background-position: -110px 0;
    vertical-align: top;
  }
  &-switcher__open {
    //background-position: -92px 0;
  }
  &-switcher__close {
    //background-position: -74px 0;
  }
}