h1.bqbt2 {
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}

.yingwen2 {
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  font-weight: bold;
  text-align: center;
  text-indent: 0em;
}

.frontCover {
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}

span.super {
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  vertical-align: super;
}

.content {
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  font-size:1em;
}

.firstTitle {
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  text-indent: 0em;
  text-align: center;
}

.secondTitle {
  text-indent: 0em;
  font-weight: bold;
  font-size: 1.3em;
}

[lang="en"] {
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  -webkit-hyphenate-limit-after: 3;
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  hyphens: auto;
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}