/* 右侧「产品方案」表单补充样式：产品需求下拉、文本框浅色提示 */
.common-contact ._content_ .contact-right .form-box form fieldset .form-line .input-box select {
  all: unset;
  box-sizing: border-box;
  display: block;
  width: 100%;
  padding: 1.6rem 3.6rem 1.6rem 1.4rem;
  font-size: var(--fz-16, 14px);
  font-weight: 400;
  line-height: 1;
  cursor: pointer;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23999' stroke-width='1.5'/%3E%3C/svg%3E") no-repeat right 1.4rem center / 1.2rem auto;
}
.common-contact ._content_ .contact-right .form-box form fieldset .form-line .input-box select option {
  color: #333;
}
/* 需求文本框：浅色 placeholder 提示 */
.common-contact ._content_ .contact-right .form-box form fieldset .form-line .input-box textarea {
  line-height: 1.6;
}
.common-contact ._content_ .contact-right .form-box form fieldset .form-line .input-box textarea::placeholder {
  color: #c5cdcf;
  opacity: .75;
}

/* 联系页「联系我们」表单（contact.html）
   框内平时只显示字段名；点进输入框、字段名滑走后，再显示「例如：…」浅色示例 */
.contactUs-form ._content_ .form-box form fieldset .form-line .input-box input::placeholder,
.contactUs-form ._content_ .form-box form fieldset .form-line .input-box textarea::placeholder {
  color: #c5cdcf;
  opacity: 0;
  transition: opacity .35s ease-out;
}
.contactUs-form ._content_ .form-box form fieldset .form-line .input-box:focus-within input::placeholder,
.contactUs-form ._content_ .form-box form fieldset .form-line .input-box:focus-within textarea::placeholder {
  opacity: 1;
}
/* 大文本框下方的淡色小字说明 */
.contactUs-form ._content_ .form-box form fieldset .form-note {
  margin: 1rem 0 0;
  color: #b8bfc1;
  font-size: var(--fz-14, 13px);
  line-height: 1.6;
}