body {
  font-family: Helvetica Neue,PingFang SC,Microsoft YaHei;
  margin: 0;
}



img {
  height: 41px;
}

.main-words {
  padding: 80px 15% 1% 15%;
  background-color: #f0f0f0;
}

@media screen and (max-width: 768px) {

  .main-words {
    padding: 80px 2% 1% 2%;
    background-color: #f0f0f0;
  }

  h1 {
    display: none;
  }

  img {
    height: 40px;
  }
}

.learn-more {
  color: #5396ee;
  font-weight: bold;
  text-decoration: none;
  display: block;
  /* 这里添加了 display:block，让 a 标签单独占一行 */
  margin-bottom: 10px;
  /* 添加了 margin-bottom，让下一个 a 标签跟它有一定的距离 */
  margin-top: 1em
}


header h1 {
  font-size: 36px;
  margin: 0;
  color: #1a1a1a;
}

#search-form {
  margin: 0;
}

#search-box {
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 20px;
  background-color: #f5f5f5;
  color: #1a1a1a;
}

#search-button {
  padding: 10px;
  font-size: 16px;
  border: none;
  border-radius: 4px;
  background-color: #fff;
  color: #222;
}

.contentwords{
	font-weight: bold;
	padding-left: 20px;
}

#content {
  display: grid;
  grid-template-columns: 1fr;
}

.term {
  margin-top: 20px;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}

.term h3 {
  font-size: 18px;
  margin: 0 0 10px 0;
  font-weight: bold;
}

.term p {
  font-size: 14px;
  margin: 0;
}