/* ========== 基础变量 ========== */
:root {
  --captcha-primary: #2563eb;
  --captcha-primary-hover: #1d4ed8;
  --captcha-primary-light: #3b82f6;
  --captcha-success: #22c55e;
  --captcha-success-light: #4ade80;
  --captcha-error: #ef4444;
  --captcha-error-light: #f87171;
  --captcha-warning: #f59e0b;
  --captcha-bg-light: #ffffff;
  --captcha-bg-dark: #1e1e1e;
  --captcha-border-light: #dbeafe;
  --captcha-border-dark: #333333;
  --captcha-text-light: #1e293b;
  --captcha-text-dark: #e0e0e0;
  --captcha-shadow: 0 4px 16px rgba(37, 99, 235, 0.12);
  --captcha-shadow-hover: 0 8px 24px rgba(37, 99, 235, 0.2);
  --captcha-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --captcha-radius: 14px;
}

/* ========== 主容器 ========== */
.captcha-widget {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  width: 100% !important;
  min-width: 280px !important;
  max-width: 320px !important;
  user-select: none;
  -webkit-user-select: none;
  padding: 16px;
  background: var(--captcha-bg-light);
  border-radius: 18px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.08);
  transition: box-shadow 0.3s ease;
}

.captcha-widget:hover {
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* ========== 二维拖拽区域 ========== */
.captcha-drag-container {
  position: relative;
}

.captcha-drag-area {
  position: relative;
  width: 100% !important;
  min-width: 280px !important;
  min-height: 280px !important;
  aspect-ratio: 1;
  background: linear-gradient(145deg, #f0f5ff 0%, #e0e8f7 50%, #eef2ff 100%);
  border-radius: var(--captcha-radius);
  border: 2px solid var(--captcha-border-light);
  overflow: hidden;
  box-shadow: inset 0 2px 6px rgba(37, 99, 235, 0.04), 0 2px 8px rgba(0, 0, 0, 0.03);
  transition: var(--captcha-transition);
}

.captcha-drag-area:hover {
  border-color: var(--captcha-primary-light);
  box-shadow: inset 0 2px 6px rgba(37, 99, 235, 0.04), 0 4px 16px rgba(37, 99, 235, 0.12);
}

/* 网格背景 */
.captcha-drag-area::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(37, 99, 235, 0.06) 1px, transparent 0);
  background-size: 20% 20%;
  pointer-events: none;
}

/* ========== 目标区域 ========== */
.captcha-drag-target {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.captcha-drag-target-zone {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.06);
  border: 2px dashed rgba(37, 99, 235, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  position: relative;
  animation: captcha-target-pulse 2.5s ease-in-out infinite;
}

.captcha-drag-target-zone::after {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.25);
  position: absolute;
  animation: captcha-target-dot 2.5s ease-in-out infinite;
}

@keyframes captcha-target-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.85; }
}

@keyframes captcha-target-dot {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.captcha-drag-target.in-range .captcha-drag-target-zone {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.6);
  border-style: solid;
  box-shadow: 0 0 16px rgba(34, 197, 94, 0.25);
  animation: none;
}

.captcha-drag-target.in-range .captcha-drag-target-zone::after {
  background: rgba(34, 197, 94, 0.5);
  animation: none;
}

.captcha-drag-target.verified .captcha-drag-target-zone {
  background: rgba(34, 197, 94, 0.15);
  border-color: var(--captcha-success);
  border-style: solid;
  animation: none;
}

/* ========== 拖拽按钮 ========== */
.captcha-drag-button {
  position: absolute;
  left: 8px;
  top: 8px;
  width: 44px;
  height: 44px;
  background: linear-gradient(145deg, #ffffff 0%, #f0f4ff 100%);
  border-radius: 50%;
  box-shadow: 0 3px 12px rgba(37, 99, 235, 0.18), 0 1px 3px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  z-index: 10;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  animation: captcha-btn-ready 2s ease-in-out infinite;
}

@keyframes captcha-btn-ready {
  0%, 100% { box-shadow: 0 3px 12px rgba(37, 99, 235, 0.18), 0 1px 3px rgba(0, 0, 0, 0.08); }
  50% { box-shadow: 0 3px 12px rgba(37, 99, 235, 0.28), 0 1px 3px rgba(0, 0, 0, 0.08), 0 0 0 6px rgba(37, 99, 235, 0.08); }
}

.captcha-drag-button:hover {
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25), 0 2px 6px rgba(0, 0, 0, 0.08);
  transform: scale(1.08);
  animation: none;
}

.captcha-drag-button:active {
  cursor: grabbing;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
  transform: scale(0.95);
  animation: none;
}

.captcha-drag-button:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
  animation: none;
}

.captcha-drag-button svg {
  width: 22px;
  height: 22px;
  fill: var(--captcha-primary);
  transition: var(--captcha-transition);
}

.captcha-drag-button.success {
  background: linear-gradient(145deg, var(--captcha-success) 0%, var(--captcha-success-light) 100%);
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.35);
  cursor: default;
  animation: captcha-success-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes captcha-success-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.captcha-drag-button.success svg {
  fill: white;
}

.captcha-drag-button.error {
  background: linear-gradient(145deg, var(--captcha-error) 0%, var(--captcha-error-light) 100%);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
  animation: none;
}

.captcha-drag-button.error svg {
  fill: white;
}

/* ========== 提示文字 ========== */
.captcha-drag-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: #64748b;
  white-space: nowrap;
  pointer-events: none;
  transition: var(--captcha-transition);
  font-weight: 500;
  letter-spacing: 0.3px;
  background: rgba(255, 255, 255, 0.88);
  padding: 5px 16px;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(37, 99, 235, 0.06);
}

.captcha-drag-hint.success {
  color: var(--captcha-success);
  background: rgba(240, 253, 244, 0.92);
  border-color: rgba(34, 197, 94, 0.12);
  font-weight: 600;
}

.captcha-drag-hint.error {
  color: var(--captcha-error);
  background: rgba(254, 242, 242, 0.92);
  border-color: rgba(239, 68, 68, 0.12);
}

/* ========== AI 分析状态栏 ========== */
.captcha-ai-status {
  display: none;
  text-align: center;
  font-size: 12px;
  padding: 8px 14px;
  margin-top: 8px;
  border-radius: 10px;
  background: linear-gradient(135deg, #f0f5ff 0%, #eef2ff 100%);
  border: 1px solid rgba(37, 99, 235, 0.08);
  animation: captcha-ai-fadein 0.3s ease;
  overflow: hidden;
  position: relative;
}

.captcha-ai-status::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.04), transparent);
  animation: captcha-ai-shimmer 2s ease-in-out infinite;
}

@keyframes captcha-ai-fadein {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes captcha-ai-shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

.captcha-ai-status-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  z-index: 1;
}

.captcha-ai-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 10px;
}

.captcha-ai-icon.human {
  background: rgba(34, 197, 94, 0.12);
  color: var(--captcha-success);
}

.captcha-ai-icon.suspicious {
  background: rgba(245, 158, 11, 0.12);
  color: var(--captcha-warning);
}

.captcha-ai-icon.danger {
  background: rgba(239, 68, 68, 0.12);
  color: var(--captcha-error);
}

.captcha-ai-label {
  font-weight: 600;
  font-size: 12px;
}

.captcha-ai-score {
  color: #94a3b8;
  font-size: 11px;
}

.captcha-ai-comment {
  font-size: 12px;
  color: #64748b;
  margin-top: 4px;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 6px;
  position: relative;
  z-index: 1;
  font-style: italic;
  letter-spacing: 0.2px;
}

.captcha-ai-detail-btn {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 10px;
  font-size: 11px;
  color: var(--captcha-primary);
  background: none;
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  z-index: 1;
  font-weight: 500;
}

.captcha-ai-detail-btn:hover {
  background: rgba(37, 99, 235, 0.06);
  border-color: rgba(37, 99, 235, 0.35);
}

.captcha-ai-detail-btn::after {
  content: ' ▾';
  font-size: 10px;
}

.captcha-ai-expanded .captcha-ai-detail-btn::after {
  content: ' ▴';
}

.captcha-ai-detail-content {
  display: none;
  margin-top: 6px;
  padding: 8px 10px;
  font-size: 11px;
  color: #64748b;
  line-height: 1.6;
  background: rgba(0, 0, 0, 0.02);
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  position: relative;
  z-index: 1;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 120px;
  overflow-y: auto;
}

.captcha-ai-expanded .captcha-ai-detail-content {
  display: block;
  animation: captcha-ai-detail-in 0.2s ease;
}

@keyframes captcha-ai-detail-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.captcha-ai-bar {
  height: 3px;
  border-radius: 2px;
  background: #e2e8f0;
  margin-top: 6px;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.captcha-ai-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 状态样式 ========== */
.captcha-widget[data-state="loading"] .captcha-drag-area {
  border-color: var(--captcha-primary-light);
}

.captcha-widget[data-state="loading"] .captcha-drag-button {
  cursor: wait;
  animation: none;
}

.captcha-widget[data-state="success"] .captcha-drag-area {
  border-color: var(--captcha-success);
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.15);
}

.captcha-widget[data-state="error"] .captcha-drag-area {
  border-color: var(--captcha-error);
  animation: captcha-shake 0.5s ease;
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.15);
}

@keyframes captcha-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ========== 等待令牌状态 ========== */
.captcha-drag-area[data-waiting="true"] {
  cursor: wait;
  opacity: 0.8;
}

.captcha-drag-area[data-waiting="true"] .captcha-drag-hint {
  color: #94a3b8;
}

.captcha-drag-area[data-waiting="true"] .captcha-drag-button {
  cursor: wait;
  opacity: 0.5;
  animation: none;
}

/* ========== 品牌标识 ========== */
.captcha-brand {
  margin-top: 10px;
  font-size: 11px;
  color: #94a3b8;
  text-align: right;
  font-weight: 500;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  transition: var(--captcha-transition);
}

.captcha-brand-icon {
  width: 14px;
  height: 14px;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.captcha-brand-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.captcha-widget:hover .captcha-brand {
  color: var(--captcha-primary);
}

.captcha-widget:hover .captcha-brand-icon {
  opacity: 0.8;
}

/* ========== 图片验证按钮 ========== */
.captcha-skip-to-image-btn {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  font-size: 11px;
  color: var(--captcha-primary, #3b82f6);
  background: transparent;
  border: 1px solid var(--captcha-primary, #3b82f6);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 500;
  letter-spacing: 0.3px;
  opacity: 0.7;
}

.captcha-skip-to-image-btn:hover {
  opacity: 1;
  background: var(--captcha-primary, #3b82f6);
  color: #fff;
}

.captcha-skip-to-image-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.captcha-theme-dark .captcha-skip-to-image-btn {
  color: #60a5fa;
  border-color: #60a5fa;
}

.captcha-theme-dark .captcha-skip-to-image-btn:hover {
  background: #60a5fa;
  color: #1e293b;
}

/* ========== 消息提示 ========== */
.captcha-message {
  margin-top: 8px;
  font-size: 13px;
  min-height: 20px;
  transition: var(--captcha-transition);
  padding: 8px 14px;
  border-radius: 10px;
  text-align: center;
}

.captcha-message-error {
  color: var(--captcha-error);
  background: rgba(239, 68, 68, 0.06);
}

.captcha-message-success {
  color: var(--captcha-success);
  background: rgba(34, 197, 94, 0.06);
}

.captcha-message-info {
  color: var(--captcha-primary);
  background: rgba(37, 99, 235, 0.06);
}

/* ========== 暗色主题 ========== */
.captcha-theme-dark .captcha-widget,
.captcha-widget.captcha-theme-dark {
  background: var(--captcha-bg-dark);
  border-color: rgba(37, 99, 235, 0.12);
}

.captcha-theme-dark .captcha-drag-area {
  background: linear-gradient(145deg, #2d2d2d 0%, #1e1e1e 100%);
  border-color: var(--captcha-border-dark);
}

.captcha-theme-dark .captcha-drag-area:hover {
  border-color: var(--captcha-primary-light);
}

.captcha-theme-dark .captcha-drag-area::before {
  background-image:
    radial-gradient(circle at 1px 1px, rgba(37, 99, 235, 0.08) 1px, transparent 0);
}

.captcha-theme-dark .captcha-drag-target-zone {
  background: rgba(37, 99, 235, 0.06);
  border-color: rgba(37, 99, 235, 0.25);
}

.captcha-theme-dark .captcha-drag-target-zone::after {
  background: rgba(37, 99, 235, 0.35);
}

.captcha-theme-dark .captcha-drag-target.in-range .captcha-drag-target-zone {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.45);
}

.captcha-theme-dark .captcha-drag-button {
  background: linear-gradient(145deg, #444 0%, #333 100%);
}

.captcha-theme-dark .captcha-drag-button svg {
  fill: #60a5fa;
}

.captcha-theme-dark .captcha-drag-hint {
  color: #94a3b8;
  background: rgba(30, 30, 30, 0.88);
  border-color: rgba(255, 255, 255, 0.06);
}

.captcha-theme-dark .captcha-drag-hint.success {
  color: #86efac;
  background: rgba(30, 30, 30, 0.92);
}

.captcha-theme-dark .captcha-brand {
  color: #555;
}

.captcha-theme-dark .captcha-ai-status {
  background: linear-gradient(135deg, #1e293b 0%, #1e1e2e 100%);
  border-color: rgba(37, 99, 235, 0.12);
}

.captcha-theme-dark .captcha-ai-bar {
  background: #333;
}

/* ========== 响应式 ========== */
@media (max-width: 480px) {
  .captcha-widget {
    max-width: 100%;
    padding: 12px;
  }

  .captcha-drag-button {
    width: 38px;
    height: 38px;
  }

  .captcha-drag-target-zone {
    width: 42px;
    height: 42px;
  }

  .captcha-drag-hint {
    font-size: 11px;
  }
}

/* ========== 无障碍 ========== */
@media (prefers-reduced-motion: reduce) {
  .captcha-drag-button,
  .captcha-drag-area,
  .captcha-drag-hint,
  .captcha-drag-target-zone {
    transition: none;
    animation: none;
  }

  .captcha-widget[data-state="error"] .captcha-drag-area {
    animation: none;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  .captcha-drag-area {
    border-width: 3px;
  }
}

/* ========== 紧凑模式（容器不足时显示） ========== */
.captcha-compact {
  max-width: 100% !important;
  min-width: auto !important;
}

.captcha-compact-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: linear-gradient(145deg, #f0f5ff 0%, #e8ecf4 100%);
  border-radius: var(--captcha-radius);
  border: 2px solid var(--captcha-border-light);
  cursor: pointer;
  transition: var(--captcha-transition);
}

.captcha-compact-box:hover {
  border-color: var(--captcha-primary-light);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.12);
}

.captcha-compact-box:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.captcha-compact-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(145deg, var(--captcha-primary) 0%, var(--captcha-primary-hover) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.captcha-compact-icon svg {
  width: 20px;
  height: 20px;
  fill: white;
}

.captcha-compact-text {
  font-size: 14px;
  color: #475569;
  font-weight: 500;
}

.captcha-theme-dark .captcha-compact-box {
  background: linear-gradient(145deg, #2d2d2d 0%, #1e1e1e 100%);
  border-color: var(--captcha-border-dark);
}

.captcha-theme-dark .captcha-compact-text {
  color: #cbd5e1;
}

/* ========== 全屏弹窗模式 ========== */
.captcha-fullscreen-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 999999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.captcha-fullscreen-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
}

.captcha-fullscreen-content {
  position: relative;
  background: white;
  border-radius: 22px;
  padding: 28px;
  max-width: 400px;
  width: 90%;
  max-height: 90vh;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(37, 99, 235, 0.06);
  animation: captcha-modal-in 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes captcha-modal-in {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(16px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.captcha-fullscreen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.captcha-fullscreen-header h3 {
  margin: 0;
  font-size: 18px;
  color: var(--captcha-text-light);
  font-weight: 600;
}

.captcha-fullscreen-close {
  width: 34px;
  height: 34px;
  border: none;
  background: #f1f5f9;
  border-radius: 50%;
  font-size: 18px;
  color: #64748b;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.captcha-fullscreen-close:hover {
  background: #e2e8f0;
  color: #334155;
}

.captcha-fullscreen-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.captcha-fullscreen-body .captcha-drag-area {
  width: 320px !important;
  height: 320px !important;
  min-width: 320px !important;
  min-height: 320px !important;
}

.captcha-fullscreen-footer {
  margin-top: 16px;
  text-align: right;
}

.captcha-fullscreen-footer .captcha-brand {
  margin-top: 0;
}

/* 暗色主题全屏弹窗 */
.captcha-theme-dark .captcha-fullscreen-content {
  background: #2d2d2d;
}

.captcha-theme-dark .captcha-fullscreen-header h3 {
  color: #f1f5f9;
}

.captcha-theme-dark .captcha-fullscreen-close {
  background: #3f3f46;
  color: #a1a1aa;
}

.captcha-theme-dark .captcha-fullscreen-close:hover {
  background: #52525b;
  color: #f4f4f5;
}

/* 移动端全屏弹窗适配 */
@media (max-width: 480px) {
  .captcha-fullscreen-content {
    width: 95%;
    padding: 20px;
  }

  .captcha-fullscreen-body .captcha-drag-area {
    width: 280px !important;
    height: 280px !important;
    min-width: 280px !important;
    min-height: 280px !important;
  }
}

/* ========== 二次验证弹窗 ========== */
.captcha-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

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

.captcha-modal {
  background: white;
  border-radius: 20px;
  padding: 28px;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(37, 99, 235, 0.06);
  transform: scale(0.92) translateY(16px);
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.captcha-modal-overlay.active .captcha-modal {
  transform: scale(1) translateY(0);
}

.captcha-modal-header {
  text-align: center;
  margin-bottom: 20px;
}

.captcha-modal-header-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  background: linear-gradient(145deg, #eff6ff 0%, #dbeafe 100%);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.captcha-modal-header-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--captcha-primary);
}

.captcha-modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--captcha-text-light);
  margin-bottom: 4px;
}

.captcha-modal-subtitle {
  font-size: 13px;
  color: #94a3b8;
}

.captcha-question-box {
  background: linear-gradient(145deg, #eff6ff 0%, #f0f0ff 100%);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 16px;
  text-align: center;
  border: 1px solid rgba(37, 99, 235, 0.06);
}

.captcha-question {
  font-size: 28px;
  font-weight: 700;
  color: var(--captcha-primary);
  margin-bottom: 8px;
}

.captcha-question-hint {
  font-size: 12px;
  color: #94a3b8;
}

.captcha-answer-input {
  width: 100%;
  padding: 14px 18px;
  font-size: 18px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
  margin-bottom: 16px;
  box-sizing: border-box;
  background: #f8fafc;
}

.captcha-answer-input:focus {
  outline: none;
  border-color: var(--captcha-primary-light);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
  background: white;
}

.captcha-answer-input.error {
  border-color: var(--captcha-error);
  animation: captcha-shake 0.5s ease;
}

.captcha-answer-input.success {
  border-color: var(--captcha-success);
}

.captcha-modal-buttons {
  display: flex;
  gap: 10px;
}

.captcha-btn {
  flex: 1;
  padding: 13px 20px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.2px;
}

.captcha-btn-primary {
  background: linear-gradient(145deg, var(--captcha-primary) 0%, var(--captcha-primary-hover) 100%);
  color: white;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.captcha-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
}

.captcha-btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.captcha-btn-primary.loading {
  position: relative;
  color: transparent;
}

.captcha-btn-primary.loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: captcha-spin 0.6s linear infinite;
  top: 50%;
  left: 50%;
  margin: -9px 0 0 -9px;
}

@keyframes captcha-spin {
  to { transform: rotate(360deg); }
}

.captcha-btn-secondary {
  background: #f1f5f9;
  color: #64748b;
}

.captcha-btn-secondary:hover {
  background: #e2e8f0;
  color: #475569;
}

.captcha-modal-error {
  color: var(--captcha-error);
  font-size: 13px;
  text-align: center;
  margin-top: 10px;
  min-height: 20px;
  transition: all 0.2s ease;
}

/* 暗色主题弹窗 */
.captcha-theme-dark .captcha-modal {
  background: #2d2d2d;
}

.captcha-theme-dark .captcha-modal-header-icon {
  background: linear-gradient(145deg, #1e293b 0%, #1e1e2e 100%);
}

.captcha-theme-dark .captcha-modal-title {
  color: #f1f5f9;
}

.captcha-theme-dark .captcha-modal-subtitle {
  color: #64748b;
}

.captcha-theme-dark .captcha-question-box {
  background: linear-gradient(145deg, #1e293b 0%, #1e1e2e 100%);
  border-color: rgba(37, 99, 235, 0.1);
}

.captcha-theme-dark .captcha-question {
  color: #60a5fa;
}

.captcha-theme-dark .captcha-answer-input {
  background: #1e1e1e;
  border-color: #3f3f46;
  color: #f1f5f9;
}

.captcha-theme-dark .captcha-answer-input:focus {
  border-color: var(--captcha-primary-light);
}

.captcha-theme-dark .captcha-btn-secondary {
  background: #3f3f46;
  color: #a1a1aa;
}

.captcha-theme-dark .captcha-btn-secondary:hover {
  background: #52525b;
  color: #e4e4e7;
}

/* ========== 四宫格图片选择 ========== */
.captcha-question-img {
  font-size: 22px;
  font-weight: 700;
  color: var(--captcha-primary);
  margin-bottom: 6px;
  line-height: 1.4;
}

.captcha-theme-dark .captcha-question-img {
  color: #60a5fa;
}

.captcha-question-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--captcha-text-light);
  margin-bottom: 8px;
}

.captcha-theme-dark .captcha-question-label {
  color: #e2e8f0;
}

.captcha-question-color-img {
  width: 160px;
  height: 64px;
  border-radius: 10px;
  margin-bottom: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  user-select: none;
  -webkit-user-select: none;
}

.captcha-theme-dark .captcha-question-color-img {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.captcha-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 4px;
}

.captcha-option-btn {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border: 3px solid transparent;
  border-radius: 14px;
  background: transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  padding: 0;
}

.captcha-option-btn:hover:not(:disabled) {
  border-color: var(--captcha-primary-light);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.18);
}

.captcha-option-btn:active:not(:disabled) {
  transform: translateY(0) scale(0.97);
}

.captcha-option-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.captcha-option-img {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 11px;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
  object-fit: cover;
}

.captcha-option-btn.loading {
  animation: captcha-option-pulse 0.8s ease infinite;
}

.captcha-option-btn.correct {
  border-color: var(--captcha-success);
  transform: scale(1.03);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.3);
}

.captcha-option-btn.wrong {
  border-color: var(--captcha-error);
  animation: captcha-shake 0.5s ease;
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.25);
}

.captcha-option-btn.selected {
  border-color: var(--captcha-primary);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
}

.captcha-option-check {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0);
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.captcha-option-btn.selected .captcha-option-check {
  opacity: 1;
  transform: scale(1);
  background: var(--captcha-primary);
}

.captcha-option-check::after {
  content: '';
  width: 8px;
  height: 5px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translateY(-1px);
}

.captcha-theme-dark .captcha-option-check {
  background: rgba(0, 0, 0, 0.5);
}

.captcha-theme-dark .captcha-option-btn.selected .captcha-option-check {
  background: var(--captcha-primary);
}

/* 暗色主题选项 */
.captcha-theme-dark .captcha-option-btn {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
}

.captcha-theme-dark .captcha-option-btn:hover:not(:disabled) {
  border-color: #60a5fa;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

.captcha-theme-dark .captcha-option-btn.correct {
  border-color: var(--captcha-success-light);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.35);
}

.captcha-theme-dark .captcha-option-btn.wrong {
  border-color: var(--captcha-error-light);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.35);
}

@keyframes captcha-option-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* ========== 进度条 ========== */
.captcha-progress {
  padding: 0 0 14px;
  max-height: 80px;
  transition: opacity 0.4s ease, max-height 0.4s ease, padding 0.4s ease, margin 0.4s ease;
  overflow: hidden;
}

.captcha-progress-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.captcha-progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  position: relative;
}

.captcha-progress-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 6px;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  z-index: 1;
}

.captcha-progress-dot span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #94a3b8;
  transition: all 0.3s ease;
}

.captcha-progress-step.active .captcha-progress-dot {
  background: var(--captcha-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.captcha-progress-step.active .captcha-progress-dot span {
  background: white;
  animation: captcha-progress-pulse 1.2s ease-in-out infinite;
}

.captcha-progress-step.completed .captcha-progress-dot {
  background: var(--captcha-success);
}

.captcha-progress-step.completed .captcha-progress-dot span {
  background: white;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.captcha-progress-label {
  font-size: 11px;
  color: #94a3b8;
  font-weight: 500;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.captcha-progress-step.active .captcha-progress-label {
  color: var(--captcha-primary);
  font-weight: 600;
}

.captcha-progress-step.completed .captcha-progress-label {
  color: var(--captcha-success);
}

.captcha-progress-bar {
  height: 3px;
  background: #e2e8f0;
  border-radius: 2px;
  margin: 10px 12% 0;
  overflow: hidden;
}

.captcha-progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--captcha-primary), var(--captcha-primary-light));
  border-radius: 2px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.captcha-progress-done {
  opacity: 0;
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin-top: 0;
  overflow: hidden;
  transition: opacity 0.4s ease, max-height 0.4s ease, padding 0.4s ease, margin 0.4s ease;
}

@keyframes captcha-progress-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}

/* 暗色主题进度条 */
.captcha-theme-dark .captcha-progress-dot {
  background: #3f3f46;
}

.captcha-theme-dark .captcha-progress-dot span {
  background: #71717a;
}

.captcha-theme-dark .captcha-progress-step.active .captcha-progress-dot {
  background: var(--captcha-primary);
}

.captcha-theme-dark .captcha-progress-step.active .captcha-progress-dot span {
  background: white;
}

.captcha-theme-dark .captcha-progress-step.completed .captcha-progress-dot {
  background: var(--captcha-success);
}

.captcha-theme-dark .captcha-progress-label {
  color: #71717a;
}

.captcha-theme-dark .captcha-progress-step.active .captcha-progress-label {
  color: #60a5fa;
}

.captcha-theme-dark .captcha-progress-step.completed .captcha-progress-label {
  color: var(--captcha-success-light);
}

.captcha-theme-dark .captcha-progress-bar {
  background: #3f3f46;
}