:root {
  --brand-primary: #5632c9;
  --brand-primary-hover: #4525b1;
  --brand-strong: #25104f;
  --brand-text: #29213f;
  --brand-muted: #5f5870;
  --brand-page: #f4f1fa;
  --brand-surface: #f0eafb;
  --brand-surface-hover: #e0d5f8;
  --brand-border: #d6c7f4;
  --brand-focus: #7951e1;
  --brand-on-primary: #fff;
}

* { box-sizing: border-box; }
body { padding-bottom: env(safe-area-inset-bottom); color: var(--brand-text); background: var(--brand-page); }
.check-page { width: min(100%, 560px); padding-top: 24px; }
.panel { height: auto; overflow: hidden; border-color: var(--brand-border); border-radius: 10px; box-shadow: 0 8px 24px rgba(39, 28, 75, .09); }
.panel-success > .panel-heading { color: var(--brand-on-primary); background: var(--brand-primary); border-color: var(--brand-primary); }
.panel-heading { padding: 14px 16px; }
.panel-title { font-size: 18px; }
.panel-body { padding: 20px 16px 16px; }
.form-horizontal .form-group { margin-bottom: 16px; }
.form-horizontal .control-label { padding-top: 10px; text-align: left; }
#code { width: 100%; min-height: 44px; font-size: 16px; }
.form-control:focus { border-color: var(--brand-focus); box-shadow: 0 0 0 3px rgba(86, 50, 201, .15); }
.yz-code { margin: 18px 0 0; }
.yz-code > label { display: block; margin-bottom: 8px; font-weight: 600; }
.captcha-image-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.captcha-image-frame { display: grid; place-items: center; width: 132px; height: 52px; overflow: hidden; border: 1px solid var(--brand-border); border-radius: 10px; background: #fff; color: var(--brand-muted); }
.captcha-image-frame img { display: block; width: 132px; height: 52px; object-fit: contain; }
.captcha-image-frame [hidden] { display: none; }
.captcha-image-frame span { padding: 0 8px; font-size: 12px; text-align: center; }
.captcha-refresh { min-height: 44px; padding: 0 14px; border: 1px solid var(--brand-border); border-radius: 10px; color: var(--brand-primary); background: var(--brand-surface); font-weight: 600; cursor: pointer; }
.captcha-refresh:hover, .captcha-refresh:active { background: var(--brand-surface-hover); }
.captcha-refresh:focus-visible { outline: 3px solid var(--brand-focus); outline-offset: 2px; }
.captcha-refresh:disabled { cursor: not-allowed; opacity: .55; }
#captcha-input { min-height: 48px; font-size: 16px; letter-spacing: .08em; }
#captcha-input::placeholder { letter-spacing: 0; }
#captcha-input[aria-invalid="true"] { border-color: #b42532; }
.field-error { margin: 7px 0 0; color: #b42532; }
.field-hint { margin: 7px 0 0; color: var(--brand-muted); font-size: 13px; line-height: 1.5; }
.query-status { min-height: 24px; margin: 12px 0 0; white-space: pre-line; line-height: 1.7; }
.query-status.is-error { color: #b42532; }
.submit-row { margin-top: 0; }
#checkbutton { width: 100%; min-height: 48px; border-color: var(--brand-primary); color: var(--brand-on-primary); background: var(--brand-primary); font-size: 16px; }
#checkbutton:hover, #checkbutton:active, #checkbutton:focus { border-color: var(--brand-primary-hover); color: var(--brand-on-primary); background: var(--brand-primary-hover); }
#checkbutton:focus-visible { outline: 3px solid var(--brand-focus); outline-offset: 2px; }
#checkbutton:disabled { opacity: .6; cursor: not-allowed; }
.phone-jumbotron { max-width: 560px; margin: 0 auto; }
.phone-jumbotron .jumbotron { padding: 16px 24px; color: var(--brand-text); background: var(--brand-surface); font-size: 14px; line-height: 1.6; }
.phone-jumbotron li { padding: 2px 0; }
@media (max-width: 575px) {
  .check-page { padding-top: 16px; }
  .panel-body { padding: 18px 16px 12px; }
  .form-horizontal .control-label { padding-top: 0; padding-bottom: 8px; }
}

/* 换码页 */
.swap-page { max-width: 500px; padding-top: 24px; padding-bottom: calc(24px + env(safe-area-inset-bottom)); }
.swap-page .panel { border: 0; border-radius: 16px; box-shadow: 0 10px 30px rgba(39, 28, 75, .1); }
.swap-page .panel-heading { color: var(--brand-on-primary); background: var(--brand-primary); font-size: 18px; letter-spacing: 1px; }
.swap-page .form-control { height: 48px; border-color: var(--brand-border); border-radius: 10px; font-size: 16px; }
#captcha-box { margin: 15px 0 25px; padding: 12px; border: 1px solid var(--brand-border); border-radius: 10px; background: var(--brand-surface); }
.swap-page .btn-success { display: block; width: 100%; min-height: 50px; margin-top: 10px; border: 0; border-radius: 10px; color: var(--brand-on-primary); background: var(--brand-primary); font-size: 18px; letter-spacing: 2px; }
.swap-page .btn-success:hover, .swap-page .btn-success:active, .swap-page .btn-success:focus { color: var(--brand-on-primary); background: var(--brand-primary-hover); }
.swap-page .btn-success:focus-visible { outline: 3px solid var(--brand-focus); outline-offset: 2px; }
@media (max-width: 575px) { .swap-page { padding-top: 16px; } }