/* ========== CSS 变量 ========== */
:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --secondary: #8b5cf6;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --info: #3b82f6;
  --info-light: #dbeafe;

  --bg: #f8fafc;
  --surface: #ffffff;
  --card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-focus: #6366f1;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Motion: custom easing curves from emil-design-eng skill */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
  --duration-fast: 160ms;
  --duration-base: 200ms;

  --fortune-bg: #0b1021;
  --fortune-card-back: #1e1b4b;
  --fortune-card-front: #fffbeb;
  --fortune-gold: #fbbf24;
  --fortune-amber: #f59e0b;
  --fortune-purple: #a78bfa;
  --fortune-pink: #f472b6;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========== 顶部导航 ========== */
.top-nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-brand {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 16px 0;
}

.nav-tabs {
  display: flex;
  gap: 8px;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius) var(--radius) 0 0;
  transition: color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-tab:active {
  transform: scale(0.97);
}

@media (hover: hover) and (pointer: fine) {
  .nav-tab:hover {
    color: var(--primary);
    background: var(--primary-light);
  }
}

.nav-tab.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-tab.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
}

/* ========== 主内容区 ========== */
.main-content {
  flex: 1;
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.section {
  display: none;
  animation: fadeIn 0.25s var(--ease-out) both;
}

.section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-header {
  margin-bottom: 24px;
}

.section-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* ========== 通用卡片 ========== */
.card {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: white;
}

@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
  }
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.97);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

@media (hover: hover) and (pointer: fine) {
  .btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
  }
}

.btn-success {
  background: var(--success);
  color: white;
}

@media (hover: hover) and (pointer: fine) {
  .btn-success:hover {
    background: #059669;
  }
}

.btn-danger {
  background: var(--danger);
  color: white;
}

@media (hover: hover) and (pointer: fine) {
  .btn-danger:hover {
    background: #dc2626;
  }
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

@media (hover: hover) and (pointer: fine) {
  .btn-ghost:hover {
    background: var(--bg);
    color: var(--text-primary);
  }
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* ========== 表单 ========== */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group textarea,
.import-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--surface);
  transition: border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}

.form-group input:focus,
.form-group textarea:focus,
.import-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.import-textarea {
  min-height: 240px;
  font-family: monospace;
  resize: vertical;
}

.radio-group {
  display: flex;
  gap: 16px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .radio-label:hover {
    border-color: var(--primary);
  }
}

.radio-label:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ========== AA记账 ========== */
.aa-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
  }
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
}

.stat-icon.today { background: var(--primary-light); }
.stat-icon.personal { background: var(--success-light); }
.stat-icon.aa { background: var(--warning-light); }
.stat-icon.total { background: var(--info-light); }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.aa-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.date-filter {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  background: var(--card);
  padding: 8px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
}

.date-filter input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.aa-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 20px;
}

.table-wrapper {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  background: var(--bg);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

.data-table .empty-cell {
  text-align: center;
  color: var(--text-muted);
  padding: 40px;
}

.type-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.type-badge.personal {
  background: var(--success-light);
  color: #065f46;
}

.type-badge.aa {
  background: var(--warning-light);
  color: #92400e;
}

.action-btns {
  display: flex;
  gap: 6px;
}

.action-btn {
  padding: 5px 10px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
}

.action-btn:active {
  transform: scale(0.96);
}

.action-btn.edit {
  background: var(--info-light);
  color: #1e40af;
}

@media (hover: hover) and (pointer: fine) {
  .action-btn.edit:hover {
    background: #bfdbfe;
  }
}

.action-btn.delete {
  background: var(--danger-light);
  color: #991b1b;
}

@media (hover: hover) and (pointer: fine) {
  .action-btn.delete:hover {
    background: #fecaca;
  }
}

.chart-container {
  padding: 20px;
  height: 320px;
  position: relative;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

.record-count {
  font-size: 13px;
  color: var(--text-muted);
}

.people-stepper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.people-stepper button {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  font-size: 18px;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.people-stepper button:active {
  transform: scale(0.92);
}

@media (hover: hover) and (pointer: fine) {
  .people-stepper button:hover {
    border-color: var(--primary);
    color: var(--primary);
  }
}

.people-stepper span {
  min-width: 60px;
  text-align: center;
  font-weight: 600;
}

.per-person-hint {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}

.aa-config {
  display: none;
}

.aa-config.visible {
  display: block;
}

/* ========== 题库复习 ========== */
.quiz-subnav {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  background: var(--card);
  padding: 6px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  width: fit-content;
}

.quiz-nav-btn {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}

.quiz-nav-btn:active {
  transform: scale(0.97);
}

@media (hover: hover) and (pointer: fine) {
  .quiz-nav-btn:hover {
    color: var(--primary);
  }
}

.quiz-nav-btn.active {
  background: var(--primary);
  color: white;
}

.quiz-view {
  display: none;
  animation: fadeIn 0.25s var(--ease-out) both;
}

.quiz-view.active {
  display: block;
}

.resume-banner {
  background: linear-gradient(135deg, var(--primary-light), #ede9fe);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.resume-info {
  display: flex;
  flex-direction: column;
}

.resume-info span {
  font-weight: 600;
  color: var(--primary);
}

.resume-info small {
  color: var(--text-secondary);
  font-size: 13px;
}

.resume-actions {
  display: flex;
  gap: 8px;
}

.quiz-banks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.bank-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 20px;
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out), border-color var(--duration-base) var(--ease-out);
  position: relative;
}

@media (hover: hover) and (pointer: fine) {
  .bank-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
  }
}

.bank-card.default {
  border-left: 4px solid var(--primary);
}

.bank-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.bank-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.bank-actions {
  display: flex;
  gap: 4px;
}

.bank-action-btn {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-muted);
  transition: transform var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.bank-action-btn:active {
  transform: scale(0.9);
}

@media (hover: hover) and (pointer: fine) {
  .bank-action-btn:hover {
    background: var(--bg);
    color: var(--primary);
  }

  .bank-action-btn.danger:hover {
    background: var(--danger-light);
    color: var(--danger);
  }
}

.bank-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.bank-stat {
  text-align: center;
  padding: 10px;
  background: var(--bg);
  border-radius: var(--radius);
}

.bank-stat-value {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.bank-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.bank-stat-value.wrong {
  color: var(--danger);
}

.bank-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.bank-buttons .btn {
  width: 100%;
}

.add-bank-card {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--text-muted);
  cursor: pointer;
  transition: transform var(--duration-base) var(--ease-out), border-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out), background-color var(--duration-base) var(--ease-out);
  min-height: 200px;
}

.add-bank-card:active {
  transform: scale(0.98);
}

@media (hover: hover) and (pointer: fine) {
  .add-bank-card:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
  }
}

.add-bank-icon {
  font-size: 36px;
}

/* 答题界面 */
.quiz-play-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
}

.quiz-progress-info {
  flex: 1;
  max-width: 400px;
}

.quiz-progress-info span {
  display: block;
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.progress-bar {
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 4px;
  transform-origin: left;
  transform: scaleX(var(--progress, 0));
  transition: transform 0.25s var(--ease-out);
  will-change: transform;
}

.quiz-mode-badge {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  background: var(--primary-light);
  color: var(--primary);
}

.quiz-mode-badge.wrong {
  background: var(--danger-light);
  color: var(--danger);
}

.quiz-question-card {
  max-width: 800px;
  margin: 0 auto;
  padding: 28px;
}

.question-meta {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.question-type {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.question-type.single {
  background: var(--info-light);
  color: #1e40af;
}

.question-type.multiple {
  background: #f3e8ff;
  color: #7e22ce;
}

.question-type.judge {
  background: #ffedd5;
  color: #9a3412;
}

.question-bank {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  background: var(--bg);
  color: var(--text-secondary);
}

.question-content {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 24px;
  line-height: 1.8;
}

.question-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
  background: var(--surface);
}

.option-item:active {
  transform: scale(0.99);
}

@media (hover: hover) and (pointer: fine) {
  .option-item:hover {
    border-color: var(--primary);
    background: var(--primary-light);
  }
}

.option-item.selected {
  border-color: var(--primary);
  background: var(--primary-light);
}

.option-item.correct {
  border-color: var(--success);
  background: var(--success-light);
}

.option-item.wrong {
  border-color: var(--danger);
  background: var(--danger-light);
}

.option-item.disabled {
  cursor: default;
  opacity: 0.8;
}

.option-label {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.option-item.selected .option-label,
.option-item.correct .option-label,
.option-item.wrong .option-label {
  background: white;
}

.option-item.correct .option-label {
  color: var(--success);
}

.option-item.wrong .option-label {
  color: var(--danger);
}

.option-text {
  font-size: 15px;
  color: var(--text-primary);
}

.option-mark {
  margin-left: auto;
  font-size: 13px;
  font-weight: 600;
}

.question-actions {
  display: flex;
  justify-content: center;
}

.question-feedback {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 20px;
  animation: feedbackIn 0.25s var(--ease-out);
}

@keyframes feedbackIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.feedback-result {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feedback-result.correct {
  color: var(--success);
}

.feedback-result.wrong {
  color: var(--danger);
}

.feedback-answer {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.feedback-answer strong {
  color: var(--text-primary);
}

.feedback-analysis {
  background: var(--info-light);
  border-left: 4px solid var(--info);
  padding: 14px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #1e3a8a;
  font-size: 14px;
  margin-bottom: 16px;
}

.feedback-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* 结果界面 */
.result-card {
  max-width: 500px;
  margin: 0 auto 20px;
  padding: 32px;
  text-align: center;
}

.result-score {
  font-size: 56px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.result-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.result-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
}

.result-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.result-stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}

.result-stat-value.correct {
  color: var(--success);
}

.result-stat-value.wrong {
  color: var(--danger);
}

.result-stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.result-detail {
  max-width: 800px;
  margin: 0 auto;
}

.result-detail-item {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.result-detail-item:last-child {
  border-bottom: none;
}

.result-detail-question {
  font-weight: 500;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.result-detail-answer {
  font-size: 13px;
  color: var(--text-secondary);
}

.result-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.result-icon.correct {
  background: var(--success-light);
  color: var(--success);
}

.result-icon.wrong {
  background: var(--danger-light);
  color: var(--danger);
}

/* 错题库 */
.wrong-book-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.bank-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.bank-selector button {
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  font-size: 13px;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.bank-selector button:active {
  transform: scale(0.96);
}

.bank-selector button.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.type-filter {
  display: flex;
  gap: 6px;
}

.filter-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.filter-btn:active {
  transform: scale(0.96);
}

.filter-btn.active {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.wrong-item {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 12px;
}

.wrong-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.wrong-item-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wrong-count {
  background: var(--danger-light);
  color: var(--danger);
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.wrong-remove-btn {
  padding: 6px 12px;
  border: none;
  background: var(--danger-light);
  color: var(--danger);
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}

.wrong-remove-btn:active {
  transform: scale(0.96);
}

@media (hover: hover) and (pointer: fine) {
  .wrong-remove-btn:hover {
    background: var(--danger);
    color: white;
  }
}

.wrong-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.wrong-option {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  border: 1px solid var(--border);
}

.wrong-option.correct {
  background: var(--success-light);
  border-color: var(--success);
}

.wrong-option.wrong {
  background: var(--danger-light);
  border-color: var(--danger);
}

/* 导入题库向导 */
.import-wizard {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px;
}

.wizard-steps {
  display: flex;
  justify-content: space-between;
  margin-bottom: 32px;
  position: relative;
}

.wizard-steps::before {
  content: '';
  position: absolute;
  top: 16px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--border);
  z-index: 0;
}

.wizard-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
  z-index: 1;
}

.wizard-step .step-number {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
}

.wizard-step.active .step-number,
.wizard-step.completed .step-number {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.wizard-step .step-label {
  font-size: 13px;
  color: var(--text-secondary);
}

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

.wizard-panel {
  display: none;
}

.wizard-panel.active {
  display: block;
  animation: fadeIn 0.25s var(--ease-out) both;
}

.wizard-panel h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.wizard-panel p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.format-example {
  background: #1e293b;
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  overflow-x: auto;
}

.format-example pre {
  color: #e2e8f0;
  font-family: monospace;
  font-size: 13px;
  line-height: 1.8;
}

.format-tips {
  list-style: none;
  margin-bottom: 24px;
}

.format-tips li {
  padding: 6px 0;
  padding-left: 24px;
  position: relative;
  color: var(--text-secondary);
  font-size: 14px;
}

.format-tips li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
}

.preview-info {
  background: var(--primary-light);
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  color: var(--primary);
  font-weight: 500;
}

.preview-normalized {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 16px;
  max-height: 300px;
  overflow-y: auto;
  font-family: monospace;
  font-size: 13px;
  line-height: 1.8;
  white-space: pre-wrap;
  border: 1px solid var(--border);
}

.wizard-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* ========== 幸运转盘 ========== */
#fortune-section .section-header {
  color: white;
  position: relative;
  z-index: 1;
}

#fortune-section {
  position: relative;
  background:
    radial-gradient(circle at 50% 0%, rgba(129, 140, 248, 0.22) 0%, transparent 55%),
    radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.12) 0%, transparent 45%),
    linear-gradient(160deg, #0b1021 0%, #131a35 50%, #0b1021 100%);
  border-radius: var(--radius-xl);
  padding: 36px;
  margin: -24px;
  min-height: calc(100vh - 80px);
  overflow: hidden;
}

#fortune-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(244, 114, 182, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(167, 139, 250, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.fortune-header h1,
.fortune-header p {
  color: white;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
}

.fortune-stage {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
}

.fortune-cards {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.fortune-card {
  width: 190px;
  height: 280px;
  perspective: 1100px;
  cursor: pointer;
  filter: drop-shadow(0 14px 30px rgba(0, 0, 0, 0.35));
}

.fortune-card:not(.flipped):hover .card-inner {
  transform: translateY(-4px);
}

.fortune-card.flipped:hover .card-inner {
  transform: rotateY(180deg) translateY(-4px);
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.85s var(--ease-out);
  transform-style: preserve-3d;
}

.fortune-card.flipped .card-inner {
  transform: rotateY(180deg);
}

.fortune-card.flipping .card-inner {
  animation: cardFlip 1.1s var(--ease-out) forwards;
}

@keyframes cardFlip {
  0% { transform: rotateY(0deg) scale(1); }
  50% { transform: rotateY(90deg) scale(1.05); }
  100% { transform: rotateY(180deg) scale(1); }
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.card-back {
  background:
    linear-gradient(145deg, rgba(30, 27, 75, 0.95) 0%, rgba(49, 46, 129, 0.95) 100%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 10px);
  border: 2px solid rgba(167, 139, 250, 0.5);
  color: white;
}

.card-back::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: calc(var(--radius-xl) - 6px);
  pointer-events: none;
}

.card-decoration {
  font-size: 28px;
  color: var(--fortune-gold);
  margin-bottom: 24px;
  text-shadow: 0 0 18px rgba(251, 191, 36, 0.55);
}

.card-question {
  font-size: 56px;
  font-weight: 200;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 24px;
  text-shadow: 0 0 24px rgba(255, 255, 255, 0.15);
}

.card-label {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 3px;
  text-transform: uppercase;
}

.card-front {
  background:
    linear-gradient(135deg, #fffbeb 0%, #fff7ed 100%);
  border: 2px solid rgba(245, 158, 11, 0.35);
  transform: rotateY(180deg);
  text-align: center;
}

.card-icon {
  font-size: 34px;
  margin-bottom: 10px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.card-score {
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.card-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.card-advice {
  font-size: 12.5px;
  color: #5b4a6a;
  line-height: 1.55;
  text-align: center;
  font-weight: 500;
}

.fortune-plus {
  font-size: 40px;
  color: var(--fortune-gold);
  font-weight: 300;
  text-shadow: 0 0 20px rgba(251, 191, 36, 0.45);
}

.fortune-actions {
  text-align: center;
  margin-bottom: 32px;
}

.fortune-btn {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: #451a03;
  border: none;
  padding: 15px 52px;
  border-radius: 32px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 1.5px;
  cursor: pointer;
  box-shadow:
    0 10px 28px rgba(245, 158, 11, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .fortune-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow:
      0 14px 36px rgba(245, 158, 11, 0.45),
      inset 0 1px 0 rgba(255, 255, 255, 0.5);
  }
}

.fortune-btn:active {
  transform: translateY(0) scale(0.98);
}

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

.fortune-result {
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 28px;
  animation: fadeIn 0.5s var(--ease-out) both;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}

.result-level {
  font-size: 34px;
  font-weight: 900;
  color: var(--fortune-gold);
  margin-bottom: 14px;
  text-shadow: 0 0 24px rgba(251, 191, 36, 0.45);
}

.result-description {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 14px;
  line-height: 1.65;
  font-weight: 500;
}

.result-average {
  display: inline-block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  background: rgba(0, 0, 0, 0.2);
  padding: 8px 18px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.fortune-history {
  background: rgba(255, 255, 255, 0.94);
  border-radius: var(--radius-xl);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
}

.fortune-history .card-header {
  border-bottom: 1px solid var(--border);
}

.fortune-history .card-header h3 {
  color: var(--text-primary);
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  font-size: 14px;
  transition: background-color var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .history-item:hover {
    background: rgba(241, 245, 249, 0.6);
  }
}

.history-item:last-child {
  border-bottom: none;
}

.history-score {
  font-weight: 800;
  color: var(--fortune-amber);
}

.history-level {
  color: var(--text-secondary);
  font-weight: 600;
}

/* ========== 弹窗 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.25s var(--ease-out) both;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.97); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ========== Toast ========== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  opacity: 0;
  background: var(--text-primary);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ========== 工具类 ========== */
.hidden {
  display: none !important;
}

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .aa-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .aa-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .top-nav {
    flex-direction: column;
    padding: 12px;
  }

  .nav-brand {
    padding: 0 0 12px;
  }

  .nav-tabs {
    width: 100%;
  }

  .nav-tab {
    flex: 1;
    justify-content: center;
    padding: 10px;
  }

  .tab-text {
    display: none;
  }

  .main-content {
    padding: 16px;
  }

  .aa-stats {
    grid-template-columns: 1fr;
  }

  .date-filter {
    width: 100%;
    margin-left: 0;
    flex-wrap: wrap;
  }

  .quiz-play-header {
    flex-direction: column;
    align-items: stretch;
  }

  .quiz-progress-info {
    max-width: none;
  }

  .fortune-cards {
    gap: 16px;
  }

  .fortune-card {
    width: 140px;
    height: 210px;
  }

  #fortune-section {
    margin: -16px;
    padding: 20px;
  }
}

/* ========== 自定义弹窗（替代原生 alert/confirm/prompt，适配 APK/WebView） ========== */
.custom-dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
  padding: 20px;
  backdrop-filter: blur(3px);
  animation: fadeIn 0.2s var(--ease-out) both;
}

.custom-dialog {
  background: var(--surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 360px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  text-align: center;
  animation: modalIn 0.2s var(--ease-out) both;
}

.custom-dialog-message {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 20px;
  word-break: break-word;
}

.custom-dialog-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg);
  margin-bottom: 20px;
  text-align: left;
  outline: none;
}

.custom-dialog-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.custom-dialog-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.custom-dialog-actions .btn {
  flex: 1;
  min-width: 90px;
}

/* ========== Reduced motion ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}