label {
  font-size: 0.95vw;
  font-family: "Noto Sans TC", sans-serif;
  font-weight: 300;
  color: #3e3a39;
}

#contact {
  border-top: 1px solid #b4b4b588;
  padding-top: 10vh;
}

.contactDiv .sectitle {
  margin-bottom: 10vh;
}

.form-group {
  margin-bottom: 2vw;
}

.group {
  width: 100%;
}

.inputGroup {
  width: 70%;
  margin: auto;
}

.form-group {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  width: 100%;
}

.inputGroup .form-group .input-div {
  flex-grow: 1;
}

.form-control {
  border: none;
  position: relative;
}

.input-div {
  position: relative;
  margin-left: 2em;
}

.input-div::after {
  content: " ";
  background-color: #b5b6b688;
  position: absolute;
  bottom: 0px;
  left: 0px;
  height: 1px;
  width: 100%;
}

.input-div input {
  background-color: transparent;
}

.msgArea {
  min-height: 10vw;
  background-color: transparent;
}

.inputGroup button {
  display: block;
  background-color: #1b2d51;
  border: none;
  color: #eaebed;
  padding: 1em 2em;
  width: 40%;
  margin: auto;
  margin-top: 2vw;
  margin-bottom: 2vw;
  transition: 0.5s;
}

.inputGroup button:hover {
  opacity: 0.8;
}

@media (max-width:768px) {
  .contactDiv .sectitle{ margin-bottom: 5vh;}
  #contact{padding: 7vh 0;}
}

@media (max-width:500px) {
   label{font-size: 4.1vw;}
  .inputGroup{width: 100%;}
  .inputGroup button{margin-top: 14vw;  width: 100%; padding: 0.5em 0;}
  .inputGroup .form-group{flex-direction: column; margin: 3vw 0;}
  .inputGroup .form-group .input-div{margin: 0; width: 100%;}
}