md-wechat/src/assets/less/theme.less

@nightBgColor: #333333;
@nightPreviewColor: #1e1e1e;
@nightHeaderColor: #3c3c3c;
@nightCodeMirrorColor: #1e1e1e;
@nightActiveCodeMirrorColor: gray;
@nightFontColor: gray;
@nightLinkColor: #8e9eb9;
@nightLinkTextColor: #84868b;
@nightWhiteColor: #f0f0f0;
@nightButtonBg: #1e1e1e;
@nightButtonHoverColor: #84868b;
@nightLineColor: #84868b;

.container_night {
  background-color: @nightBgColor;

  .el-main {
    background-color: @nightBgColor;
  }

  .CodeMirror {
    caret-color: @nightFontColor;
    color: @nightFontColor;
    background-color: @nightCodeMirrorColor;
    box-shadow: inset 0 0 0 1px rgba(100, 37, 37, 0.102);
  }

  .output_night {
    .preview {
      background-color: @nightPreviewColor;
      box-shadow: 0 0 70px rgba(0, 0, 0, 0.3);
    }

    .preview-wrapper {
      background-color: @nightCodeMirrorColor;
      box-shadow: inset 0 0 0 1px rgba(233, 231, 231, 0.102);
    }

    .code-snippet__fix {
      background-color: rgb(238, 238, 238);
    }
  }

  .cm-s-style-mirror .CodeMirror-matchingbracket {
    color: @nightWhiteColor !important;
    background: rgb(30, 30, 30) !important;
  }

  .cm-s-xq-light span.cm-variable-2,
  .cm-s-style-mirror span.cm-tag {
    color: @nightFontColor;
  }

  .cm-s-xq-light .CodeMirror-activeline-background {
    background-color: transparent;
  }

  .cm-s-xq-light span.cm-string {
    color: @nightLinkColor;
  }

  .cm-s-xq-light span.cm-link {
    color: @nightLinkTextColor;
  }

  .editor__header {
    background-color: @nightHeaderColor;
  }

  .el-button {
    color: @nightWhiteColor;
    background-color: @nightCodeMirrorColor;
    border: 1px solid transparent;
  }

  .el-button.is-plain:focus,
  .el-button.is-plain:hover {
    background: @nightButtonBg;
    color: @nightWhiteColor;
    border: 1px solid @nightWhiteColor;

    i {
      color: @nightWhiteColor;
    }
  }

  .insert__dialog,
  .about__dialog,
  .reset__dialog,
  .upload__dialog {
    .el-dialog {
      background-color: @nightBgColor;
    }

    .el-dialog__body {
      color: @nightWhiteColor;
    }

    .el-dialog__title,
    .el-form-item__label {
      color: @nightWhiteColor;
    }

    .el-tabs__item {
      color: @nightActiveCodeMirrorColor;
    }

    .el-tabs__nav-wrap::after {
      background-color: @nightLineColor;
    }

    .is-active {
      color: @nightWhiteColor;
    }

    .el-upload-dragger {
      background-color: @nightButtonBg;
    }
  }

  ::v-deep .el-icon-upload,
  .el-icon-download,
  .el-icon-refresh,
  .el-icon-s-grid {
    color: @nightWhiteColor;
  }

  ::-webkit-scrollbar {
    background-color: @nightCodeMirrorColor;
  }
}

.CodeMirror {
  padding-bottom: 0;
  height: 100% !important;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
  font-size: 14px;
  font-family: "PingFang SC", BlinkMacSystemFont, Roboto, "Helvetica Neue",
    sans-serif !important;
}

.CodeMirror-vscrollbar:focus {
  outline: none;
}

.CodeMirror-scroll {
  padding: 20px;
  padding-bottom: 0px;
  overflow-x: hidden !important;
  overflow-y: scroll !important;
}

.CodeMirror-vscrollbar {
  width: 0px;
  height: 0px;
}

.codeMirror-wrapper {
  height: 100% !important;
}