.captcha-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.captcha-modal--visible {
  opacity: 1;
  visibility: visible;
}

.captcha-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.captcha-modal__container {
  position: relative;
  box-sizing: border-box;
  width: auto;
  height: auto;
  min-width: 0;
  min-height: 0;
  background: var(--color-surface, #fff);
  /* 描边走 inset 阴影而非 border：不占盒模型（与认证卡片同机制，var 回退值按全站标准省略） */
  border: 0;
  border-radius: var(--radius-md, calc(8px * var(--ui-scale, 1)));
  box-shadow: inset 0 0 0 calc(1px * var(--ui-scale)) var(--color-border), 0 calc(8px * var(--ui-scale, 1)) calc(24px * var(--ui-scale, 1)) rgba(0, 0, 0, 0.15);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.captcha-modal__widget {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.captcha-modal__widget > * {
  display: block;
}