body {
    background-color: #f7f9fc;
    color: #333;
    padding-bottom: 50px;
}

.reg_header {
    text-align: center;
    padding: 40px 0 30px;
}

.reg_sologn {
   width:529px;
   height:48px;
    height: auto;
}


.reg_card {
    width: 800px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    padding: 40px 60px;
}

.reg_card_hd {
    border-bottom: 1px solid #eee;
    margin-bottom: 40px;
    padding-bottom: 20px;
}

.reg_card_title {
    font-size: 16px;
    font-weight: bold;
    position: relative;
    display: inline-block;
}

.reg_card_title::after {
   content: "";
   position: absolute;
   bottom: -20px;
   left: 16px;
   width: 40px;
   height: 8px;
   background: #c32626;
   border-radius: 4px;
}

.reg_form {
    width: 600px;
    margin: 0 auto;
}

.form_item {
    display: flex;
    align-items: center;
    margin-bottom: 18px;
}

.form_label {
    width: 140px;
    text-align: right;
    margin-right: 20px;
    font-size: 14px;
    color: #999;
}

.form_label .required {
    color: #c32626;
    margin-right: 4px;
}

.form_input_box {
    position: relative;
}

.form_input {
    width: 293px;
    height: 40px;
    background: #EBEDF0;
    border: none;
    border-radius: 8px;
    padding: 0 20px;
    font-size: 14px;
    outline: none;
}

.form_select {
    appearance: none;
    -webkit-appearance: none;
    background-repeat: no-repeat;
    background-position: right 15px center;
}

.form_hint {
    position: absolute;
    left: 102%;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    color: #999;
    font-size: 13px;
}

.code_box {
    display: flex;
    gap: 10px;
}

.code_box .form_input {
    width: 200px;
}

.code_img {
    width: 80px;
    height: 40px;
    background: #ccc;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #333;
    font-size: 18px;
    background-color: #c0c0c0;
}

.form_btns {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
}

.btn {
    width: 140px;
    height: 40px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn_reset {
    background: #b0b0b0;
    color: #fff;
}

.btn_submit {
    background: #c32626;
    color: #fff;
}
input::placeholder,
textarea::placeholder {
  color: #999;
  font-size: 14px;
  opacity: 1; /* 修复 Firefox 默认透明度 */
}



.form_select:required:invalid {
    color: #999;
}

.form_select option {
    color: #333;
}

/* 提示选项本身为灰色 */
.form_select option[value=""][disabled][hidden] {
    color: #999;
}