/* ========== 全局 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f5f0ff;
  --card-bg: #ffffff;
  --text: #333333;
  --text-light: #888888;
  --primary: #7c4dff;
  --primary-light: #b388ff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(124, 77, 255, 0.15);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* 五行色 */
  --fire: #ff5722;
  --fire-bg: #fff3e0;
  --water: #2196f3;
  --water-bg: #e3f2fd;
  --wood: #4caf50;
  --wood-bg: #e8f5e9;
  --metal: #ffc107;
  --metal-bg: #fff8e1;
  --earth: #795548;
  --earth-bg: #efebe9;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#app { max-width: 480px; margin: 0 auto; padding: 16px; height: 100%; }

/* ========== 屏幕切换 ========== */
/* ========== 登录 ========== */
.login-container {
  display: flex; align-items: center; justify-content: center;
  min-height: calc(100vh - 32px); padding: 20px;
}
.login-card {
  background: white; border-radius: 20px; padding: 40px 32px;
  text-align: center; box-shadow: 0 8px 40px rgba(0,0,0,0.1);
  max-width: 360px; width: 100%;
}
.login-icon { font-size: 64px; margin-bottom: 12px; }
.login-card h2 { font-size: 28px; font-weight: 800; color: var(--primary); margin-bottom: 6px; }
.login-subtitle { font-size: 14px; color: var(--text-light); margin-bottom: 24px; }
.login-input {
  width: 100%; padding: 14px 16px; font-size: 18px;
  border: 2px solid #e0e0e0; border-radius: 12px;
  text-align: center; outline: none; transition: border-color 0.2s;
}
.login-input:focus { border-color: var(--primary); }
.login-btn {
  width: 100%; padding: 14px; margin-top: 16px;
  font-size: 18px; font-weight: 700; color: white;
  background: var(--primary); border: none; border-radius: 12px;
  cursor: pointer; transition: background 0.2s;
}
.login-btn:hover { background: var(--primary-light); }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.login-error { color: #e53935; font-size: 13px; margin-top: 10px; min-height: 20px; }
.login-loading { color: var(--text-light); font-size: 14px; margin-top: 10px; }

/* ========== 用户栏 ========== */
.user-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 16px; background: rgba(124,77,255,0.08);
}
.user-name { font-size: 14px; font-weight: 600; color: var(--primary); }
.user-logout-btn {
  font-size: 12px; padding: 4px 12px; border: 1px solid #ddd;
  border-radius: 12px; background: white; cursor: pointer; color: var(--text-light);
}
.user-logout-btn:hover { border-color: var(--primary); color: var(--primary); }

.screen { display: none; flex-direction: column; min-height: calc(100vh - 32px); }
.screen.active { display: flex; }

/* ========== 头部通用 ========== */
.screen-header {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 20px; padding-bottom: 12px;
  border-bottom: 2px solid #e8e0f0;
}
.back-btn {
  background: none; border: none; color: var(--primary);
  font-size: 16px; cursor: pointer; padding: 4px 8px;
}
h1 { font-size: 32px; color: var(--primary); text-align: center; }
h2 { font-size: 24px; color: var(--text); text-align: center; margin-bottom: 8px; }
.subtitle { color: var(--text-light); font-size: 14px; text-align: center; }
.hint { color: var(--text-light); font-size: 14px; text-align: center; margin-bottom: 20px; }

/* ========== 主界面 ========== */
.title-block { text-align: center; padding: 40px 0 30px; }
.title-icon { font-size: 64px; margin-bottom: 8px; }

.menu-buttons { display: flex; flex-direction: column; gap: 16px; padding: 0 8px; }
.menu-btn {
  display: flex; align-items: center; gap: 16px;
  width: 100%; padding: 20px;
  border: none; border-radius: var(--radius);
  font-size: 18px; cursor: pointer; text-align: left;
  box-shadow: var(--shadow); transition: transform 0.15s;
}
.menu-btn:active { transform: scale(0.97); }
.menu-btn .btn-icon { font-size: 32px; }
.menu-btn .btn-label { font-weight: 700; font-size: 20px; }
.menu-btn .btn-desc { font-size: 13px; opacity: 0.8; margin-top: 2px; }

.btn-fire { background: linear-gradient(135deg, var(--fire-bg), #fff); color: var(--fire); }
.btn-water { background: linear-gradient(135deg, var(--water-bg), #fff); color: var(--water); }
.btn-earth { background: linear-gradient(135deg, var(--earth-bg), #fff); color: var(--earth); }
.btn-locked { background: #f0f0f0; color: #bbb; cursor: not-allowed; box-shadow: none; }

/* ========== 选五行 ========== */
.element-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding: 8px 0; }
.element-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 120px; height: 120px;
  border-radius: var(--radius); border: 3px solid transparent;
  cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all 0.2s; box-shadow: var(--shadow);
}
.element-card:active { transform: scale(0.95); }
.element-card.selected { border-color: var(--primary); transform: scale(1.05); }
.element-card .elem-icon { font-size: 40px; margin-bottom: 6px; }
.element-card .elem-name { font-size: 16px; }

/* 五行各自颜色 */
.elem-huo { background: var(--fire-bg); color: var(--fire); }
.elem-shui { background: var(--water-bg); color: var(--water); }
.elem-mu { background: var(--wood-bg); color: var(--wood); }
.elem-jin { background: var(--metal-bg); color: #f57f17; }
.elem-tu { background: var(--earth-bg); color: var(--earth); }

.element-result { text-align: center; margin-top: 20px; padding: 20px; background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); }
.result-row { display: flex; justify-content: center; gap: 32px; margin-bottom: 12px; }
.result-item { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.result-label { font-size: 13px; color: var(--text-light); }
.result-desc { color: var(--text-light); font-size: 14px; margin-bottom: 16px; }
.element-badge {
  display: inline-block; padding: 8px 20px; border-radius: 20px;
  font-size: 18px; font-weight: 700;
}

/* ========== 按钮 ========== */
.primary-btn {
  display: inline-block; padding: 14px 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white; border: none; border-radius: 30px;
  font-size: 18px; font-weight: 700; cursor: pointer;
  box-shadow: 0 4px 15px rgba(124, 77, 255, 0.3);
  transition: transform 0.15s;
}
.primary-btn:active { transform: scale(0.96); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.secondary-btn {
  padding: 14px 36px;
  background: white; color: var(--primary);
  border: 2px solid var(--primary-light); border-radius: 30px;
  font-size: 16px; font-weight: 600; cursor: pointer;
}
.secondary-btn:active { background: #f5f0ff; }

.text-btn { background: none; border: none; color: var(--text-light); font-size: 14px; cursor: pointer; padding: 8px; margin-top: 8px; }

/* ========== 学单词 ========== */
.progress-bar {
  flex: 1; height: 8px; background: #e8e0f0; border-radius: 4px; overflow: hidden;
}
.progress-fill {
  height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 4px; transition: width 0.3s;
}
.progress-text { font-size: 14px; color: var(--text-light); min-width: 32px; text-align: right; }

.learn-area { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 24px; padding: 20px 0; }
.element-hint { font-size: 14px; color: var(--text-light); }

.word-display {
  width: 100%; max-width: 320px; padding: 40px 24px;
  background: var(--card-bg); border-radius: var(--radius);
  box-shadow: var(--shadow); text-align: center;
}
.word-main { margin-bottom: 16px; }
.word-english { font-size: 48px; font-weight: 800; display: block; line-height: 1.2; }
.word-sentence { font-size: 16px; color: var(--text-light); font-style: italic; }
.word-chinese {
  font-size: 28px; color: var(--primary); font-weight: 600;
  animation: fadeIn 0.3s;
}

.learn-buttons { display: flex; gap: 16px; }
.learn-buttons button { min-width: 120px; }

/* ========== 连句子 ========== */
.sentence-area { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.sentence-display {
  width: 100%; min-height: 80px; padding: 20px;
  background: var(--card-bg); border-radius: var(--radius);
  box-shadow: var(--shadow); display: flex; justify-content: center; align-items: center; gap: 8px;
  font-size: 28px; font-weight: 700; line-height: 1.4;
}
.sentence-placeholder { color: #ccc; font-size: 16px; font-weight: 400; }
.word-token {
  display: inline-block; padding: 6px 16px;
  background: var(--primary-light); color: white;
  border-radius: 12px; cursor: pointer;
  animation: popIn 0.2s;
}

/* 结果显示模式 — 位置对比 */
.slot-token {
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 18px; border-radius: 12px; font-size: 24px; font-weight: 800;
  min-width: 60px; text-align: center; gap: 4px;
}
.slot-correct { background: #c8e6c9; color: #2e7d32; }
.slot-wrong { background: #ffcdd2; color: #c62828; }
.slot-empty { background: #f5f5f5; color: #bbb; border: 2px dashed #ddd; }
.slot-hint { font-size: 13px; font-weight: 400; color: #888; }

.word-bank { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding: 8px 0; }
.bank-card {
  padding: 16px 24px; background: var(--card-bg);
  border-radius: var(--radius-sm); box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  font-size: 20px; font-weight: 700; cursor: pointer;
  transition: all 0.15s; border: 2px solid transparent;
}
.bank-card:active { transform: scale(0.95); }
.bank-card.used { opacity: 0.3; pointer-events: none; border-color: #ddd; }
.bank-card .bank-cn { font-size: 13px; font-weight: 400; color: var(--text-light); display: block; margin-top: 4px; }

#sentence-actions { display: flex; justify-content: center; }

/* 句子结果区 */
#sentence-result { text-align: center; width: 100%; }
.result-message { padding: 16px; border-radius: var(--radius-sm); margin-bottom: 12px; }
.result-msg { font-size: 16px; line-height: 1.6; }
.result-msg-perfect { background: #e8f5e9; color: #2e7d32; }
.result-msg-partial { background: #fff3e0; color: #e65100; }
.result-msg-fail { background: #ffebee; color: #c62828; }
.result-msg-answer { background: #e3f2fd; color: #1565c0; }
.result-sentence { font-size: 20px; font-weight: 800; display: inline-block; margin-top: 4px; }
.result-buttons { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ========== 奖励 ========== */
.reward-area { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 20px 0; }
.reward-icon { font-size: 72px; animation: bounce 0.6s; }
.reward-desc { color: var(--text-light); }

.reward-card {
  width: 200px; padding: 30px 20px; text-align: center;
  border-radius: var(--radius); box-shadow: var(--shadow);
  animation: popIn 0.3s;
}
.reward-card .rw-word { font-size: 36px; font-weight: 800; display: block; }
.reward-card .rw-cn { font-size: 18px; color: var(--text-light); margin-top: 4px; }
.reward-card .rw-element { font-size: 14px; margin-top: 8px; display: inline-block; padding: 4px 12px; border-radius: 12px; }

.reward-action { text-align: center; }
.reward-prompt { font-size: 15px; color: var(--text); margin-bottom: 12px; font-weight: 600; }
.reward-choices { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.choice-card {
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-size: 16px; font-weight: 600; cursor: pointer;
  transition: all 0.15s;
}
.choice-card:active { transform: scale(0.95); }

.reward-buttons { display: flex; gap: 12px; margin-top: 12px; }

/* ========== 技能背包 ========== */
.backpack-grid { display: flex; flex-direction: column; gap: 16px; padding: 8px 0; }
.bp-section { }
.bp-section-header { font-size: 16px; font-weight: 700; padding: 4px 0 8px; border-bottom: 2px solid currentColor; margin-bottom: 8px; }
.bp-section-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.bp-card {
  width: calc(50% - 5px); padding: 16px;
  border-radius: var(--radius-sm); box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  display: flex; align-items: center; gap: 12px;
}
.bp-card .bp-element { font-size: 24px; }
.bp-card .bp-info { flex: 1; }
.bp-card .bp-word { font-weight: 700; font-size: 18px; }
.bp-card .bp-cn { font-size: 13px; color: var(--text-light); }
.bp-card .bp-date { font-size: 11px; color: #ccc; }

/* ========== 物品背包 ========== */
.items-grid { display: flex; flex-wrap: wrap; gap: 12px; padding: 8px 0; justify-content: center; }
.item-card {
  width: calc(50% - 6px); max-width: 200px;
  background: #fff8e1; border-radius: var(--radius-sm);
  padding: 20px 12px; text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  cursor: pointer; transition: transform 0.15s;
}
.item-card:active { transform: scale(0.96); }
.item-card.selected { outline: 3px solid #ff8f00; background: #fff3cd; }
.item-card-icon { font-size: 32px; margin-bottom: 6px; }
.item-card-label { font-size: 14px; font-weight: 700; color: #e65100; }
.item-card-sublabel { font-size: 11px; color: #888; margin-top: 2px; }
.item-card-date { font-size: 11px; color: #aaa; margin-top: 2px; }

/* 道具详情 */
.items-detail {
  margin-top: 16px; padding: 20px;
  background: #fff8e1; border-radius: var(--radius);
  text-align: center; box-shadow: var(--shadow);
}
.items-detail-icon { font-size: 48px; margin-bottom: 8px; }
.items-detail-name { font-size: 20px; font-weight: 700; color: #e65100; }
.items-detail-desc { font-size: 14px; color: #666; margin: 8px 0 16px; }
.items-detail-actions { display: flex; gap: 12px; justify-content: center; }

/* ========== 模态框 ========== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 100; }
.modal-box {
  position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: white; padding: 32px; border-radius: var(--radius);
  text-align: center; z-index: 101; min-width: 280px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.modal-box p { font-size: 18px; margin-bottom: 20px; }
.modal-buttons { display: flex; gap: 12px; justify-content: center; }
.modal-wide { min-width: 320px; max-width: 420px; }
.modal-wide h3 { margin-bottom: 16px; }

/* ========== 复习弹窗 ========== */
.review-word-list { display: flex; flex-direction: column; gap: 12px; }
.review-item { padding: 14px 16px; background: #fafafa; border-radius: 10px; cursor: pointer; transition: background 0.15s; }
.review-item:active { background: #f0f0f0; }
.review-word { font-size: 22px; font-weight: 800; }
.review-cn { font-size: 14px; color: var(--text-light); margin-top: 2px; }
.review-sentence { font-size: 13px; color: #999; font-style: italic; margin-top: 4px; }

/* ========== 挑战按钮 ========== */
.btn-challenge {
  background: linear-gradient(135deg, #fce4ec, #fff); color: #e91e63; box-shadow: var(--shadow);
}

/* ========== 级别选择 ========== */
.level-list { display: flex; flex-direction: column; gap: 16px; padding: 20px 8px; }
.level-card {
  display: flex; align-items: center; gap: 16px;
  width: 100%; padding: 24px 20px;
  border: none; border-radius: var(--radius);
  font-size: 18px; cursor: pointer; text-align: left;
  box-shadow: var(--shadow); transition: transform 0.15s;
}
.level-card:active { transform: scale(0.97); }
.level-card .level-icon { font-size: 40px; }
.level-card .level-label { font-weight: 700; font-size: 22px; }
.level-card .level-desc { font-size: 13px; opacity: 0.7; margin-top: 2px; }
.level-card.level-active { background: linear-gradient(135deg, #f3e5f5, #fff); color: var(--primary); }
.level-card.level-locked { background: #f0f0f0; color: #bbb; cursor: not-allowed; box-shadow: none; }
.level-card.level-locked:active { transform: none; }

/* ========== Boss选择 ========== */
.boss-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; padding: 8px 0; }
.boss-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 130px; padding: 20px 12px;
  border-radius: var(--radius); border: 3px solid transparent;
  cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all 0.2s; box-shadow: var(--shadow);
  gap: 6px;
}
.boss-card:active { transform: scale(0.95); }
.boss-card .boss-icon { font-size: 48px; }
.boss-card .boss-name { font-size: 18px; font-weight: 700; }
.boss-card .boss-elem { font-size: 13px; opacity: 0.8; }
.boss-card .boss-stats { font-size: 12px; color: var(--text-light); letter-spacing: 0.5px; }

/* ========== 装备 ========== */
.equip-info { display: flex; align-items: center; justify-content: space-between; padding: 0 8px; margin-bottom: 8px; }
#equip-count { font-size: 16px; font-weight: 700; color: var(--primary); }
.equip-element-counts { display: flex; gap: 6px; }
.equip-el-badge {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 2px 10px; border-radius: 12px;
  font-size: 12px; font-weight: 600;
}
.equip-el-badge.missing { opacity: 0.3; background: #eee !important; }

.equip-grid {
  display: flex; flex-wrap: wrap; gap: 8px; padding: 8px;
  max-height: 300px; overflow-y: auto;
  background: #fafafa; border-radius: var(--radius-sm);
  margin-bottom: 12px;
}
.equip-card {
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 14px; border-radius: 10px;
  cursor: pointer; border: 2px solid transparent;
  transition: all 0.15s; gap: 2px;
  width: calc(33% - 6px); max-width: 120px;
}
.equip-card:active { transform: scale(0.95); }
.equip-card.equip-selected { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(124,77,255,0.3); }
.equip-card .eq-word { font-size: 16px; font-weight: 700; }
.equip-card .eq-cn { font-size: 11px; color: var(--text-light); }
.equip-actions { display: flex; justify-content: center; padding: 8px; }

/* ========== 战斗 ========== */
#screen-battle { padding: 0; }
.battle-hud-top {
  padding: 8px 12px; background: white;
  border-bottom: 1px solid #eee;
}
.battle-boss-stats {
  display: flex; gap: 12px; margin-top: 4px;
  font-size: 12px; color: var(--text-light); font-weight: 600;
}
.battle-boss-info { display: flex; align-items: center; gap: 6px; margin-bottom: 4px; }
.battle-boss-icon { font-size: 28px; }
.battle-boss-name { font-size: 18px; font-weight: 700; }
#b-boss-card.berserk .battle-boss-icon { animation: berserk-pulse 0.8s infinite; }
#b-boss-card.berserk .battle-boss-name::after { content: ' 🔥'; }
@keyframes berserk-pulse {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 0 transparent); }
  50% { transform: scale(1.15); filter: drop-shadow(0 0 8px #ff4400); }
}
.battle-level-badge {
  font-size: 11px; padding: 2px 8px; border-radius: 8px;
  background: #e8e0f0; color: var(--text-light);
}
.battle-hp-row { display: flex; align-items: center; gap: 8px; }
.battle-hp-bar {
  flex: 1; height: 18px; background: #e0e0e0; border-radius: 10px;
  overflow: hidden; position: relative;
}
.battle-hp-fill {
  height: 100%; border-radius: 10px;
  transition: width 0.5s ease;
  background: linear-gradient(90deg, #66bb6a, #43a047);
}
.battle-hp-fill.low { background: linear-gradient(90deg, #ef5350, #e53935); }
.battle-hp-fill.mid { background: linear-gradient(90deg, #ffa726, #ff9800); }
.battle-hp-text {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  font-size: 11px; font-weight: 700; color: white; text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.battle-main {
  flex: 1; overflow-y: auto; padding: 12px;
  display: flex; flex-direction: column;
}
.battle-round-label {
  text-align: center; font-size: 16px; font-weight: 700;
  color: var(--primary); margin-bottom: 12px;
}

/* Boss题目 */
.battle-phase { width: 100%; }
.bq-question {
  text-align: center; font-size: 22px; font-weight: 700;
  padding: 20px; background: white; border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 16px; line-height: 1.6;
}
.bq-options { display: flex; flex-direction: column; gap: 10px; }
.bq-option {
  width: 100%; padding: 16px 20px;
  border: 2px solid #e0e0e0; border-radius: var(--radius-sm);
  background: white; font-size: 18px; font-weight: 600;
  cursor: pointer; text-align: center;
  transition: all 0.15s;
}
.bq-option:active { transform: scale(0.97); }
.bq-option.correct { border-color: #4caf50; background: #e8f5e9; color: #2e7d32; }
.bq-option.wrong { border-color: #f44336; background: #ffebee; color: #c62828; }
.bq-option:disabled { cursor: not-allowed; opacity: 0.7; }

.bq-result {
  text-align: center; padding: 16px; margin-top: 12px;
  border-radius: var(--radius-sm); font-size: 16px;
}
.bq-result.bq-correct { background: #e8f5e9; color: #2e7d32; }
.bq-result.bq-wrong { background: #ffebee; color: #c62828; }

/* 玩家攻击 */
.bp-sentence-area { margin-bottom: 12px; }
.bp-sentence-display {
  width: 100%; min-height: 64px; padding: 16px;
  background: white; border-radius: var(--radius);
  box-shadow: var(--shadow); display: flex; justify-content: center;
  align-items: center; gap: 6px; font-size: 22px; font-weight: 700;
  flex-wrap: wrap; line-height: 1.4;
}
.bp-error-msg {
  text-align: center; font-size: 13px; color: #e53935;
  min-height: 20px; margin-top: 4px;
}
.bp-actions { display: flex; justify-content: center; gap: 12px; margin-bottom: 8px; }
.bp-actions button { min-width: 100px; }

/* 手牌 */
.battle-hand {
  background: white; border-top: 2px solid #e8e0f0;
  padding: 8px 12px; flex-shrink: 0;
}
.battle-hand-header {
  display: flex; justify-content: space-between; margin-bottom: 6px;
}
.battle-hand-label { font-size: 13px; color: var(--text-light); font-weight: 600; }
.battle-hand-count { font-size: 13px; color: var(--primary); font-weight: 700; }
.battle-hand-cards {
  display: flex; gap: 6px; flex-wrap: wrap;
  padding: 4px 0; max-height: 130px; overflow-y: auto;
  align-content: flex-start;
}
.battle-hand-cards::-webkit-scrollbar { width: 4px; }
.battle-hand-cards::-webkit-scrollbar-thumb { background: #ddd; border-radius: 2px; }
.hand-card {
  flex-shrink: 0; width: 70px; padding: 10px 8px;
  border-radius: 10px; border: 2px solid transparent;
  cursor: pointer; text-align: center;
  transition: all 0.15s; display: flex; flex-direction: column; gap: 2px;
}
.hand-card:active { transform: scale(0.92); }
.hand-card.hand-selected {
  border-color: var(--primary); box-shadow: 0 0 0 2px rgba(124,77,255,0.3);
  transform: translateY(-8px);
}
.hand-card .hc-word { font-size: 14px; font-weight: 700; }
.hand-card .hc-cn { font-size: 10px; color: var(--text-light); }
.hand-card .hc-pos { font-size: 9px; opacity: 0.6; }

.battle-hand-empty {
  text-align: center; color: #ccc; font-size: 14px; padding: 16px 0;
}

/* 玩家HP */
.battle-hud-bottom {
  padding: 8px 12px; background: white;
  border-top: 1px solid #eee;
}
.player-hp-row { display: flex; align-items: center; gap: 8px; }
.player-hp-label { font-size: 18px; }
.player-hp .battle-hp-fill { background: linear-gradient(90deg, #ef5350, #e53935); }

/* 过渡提示 */
.bt-content {
  text-align: center; padding: 20px; font-size: 18px; line-height: 1.6;
}
.bt-content .bt-damage { font-size: 28px; font-weight: 800; color: #e53935; display: block; margin: 8px 0; }
.bt-content .bt-damage.heal { color: #43a047; }
#bt-next-btn { display: block; margin: 12px auto 0; }

/* ========== 战斗结算 ========== */
.br-area { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 40px 20px; }
.br-icon { font-size: 80px; animation: bounce 0.6s; }
.br-area h2 { font-size: 32px; }
.br-boss-defeated { font-size: 16px; color: var(--text-light); }
.br-stats {
  display: flex; gap: 20px; justify-content: center;
  background: white; padding: 20px; border-radius: var(--radius);
  box-shadow: var(--shadow); width: 100%; max-width: 360px;
}
.br-stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.br-stat-label { font-size: 13px; color: var(--text-light); }
.br-stat-value { font-size: 28px; font-weight: 800; color: var(--primary); }
.br-reward-area { text-align: center; }
.br-buttons { display: flex; flex-direction: column; align-items: center; gap: 8px; }

/* ========== 动画 ========== */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes popIn { from { transform: scale(0.8); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-8px); } 75% { transform: translateX(8px); } }

/* ========== 经验值条（主页） ========== */
.home-xp-bar {
  display: flex; align-items: center; gap: 8px;
  margin: -10px auto 16px; max-width: 380px;
  background: white; padding: 8px 14px;
  border-radius: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.home-level-text {
  font-size: 14px; font-weight: 800; color: var(--primary);
  min-width: 38px;
}
.home-title-text {
  font-size: 13px; font-weight: 600; color: var(--text-light);
  min-width: 80px; text-align: center;
}
.home-xp-track {
  flex: 1; height: 8px; background: #e8e0f0; border-radius: 4px; overflow: hidden;
}
.home-xp-fill {
  height: 100%; background: linear-gradient(90deg, #7c4dff, #b388ff);
  border-radius: 4px; transition: width 0.4s ease;
}
.home-xp-text {
  font-size: 11px; color: var(--text-light); min-width: 42px; text-align: right;
}

/* ========== 五行属性条 ========== */
.home-stats-row {
  display: flex; justify-content: center; gap: 12px;
  margin: -6px auto 14px; max-width: 380px;
  background: white; padding: 6px 14px;
  border-radius: 16px; box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.home-stat {
  font-size: 13px; font-weight: 700; color: var(--text-light);
  display: flex; align-items: center; gap: 2px;
}

/* ========== 学习选年级 ========== */
.grade-list { display: flex; flex-direction: column; gap: 16px; padding: 20px 8px; }
.grade-card {
  display: flex; align-items: center; gap: 16px;
  width: 100%; padding: 24px 20px;
  border: none; border-radius: var(--radius);
  font-size: 18px; cursor: pointer; text-align: left;
  box-shadow: var(--shadow); transition: transform 0.15s;
}
.grade-card:active { transform: scale(0.97); }
.grade-card .grade-icon { font-size: 40px; }
.grade-card .grade-info { flex: 1; }
.grade-card .grade-label { font-weight: 700; font-size: 22px; display: block; }
.grade-card .grade-desc { font-size: 13px; opacity: 0.7; margin-top: 2px; }
.grade-card .grade-lock { font-size: 20px; opacity: 0.5; }
.grade-card.grade-active { background: linear-gradient(135deg, #f3e5f5, #fff); color: var(--primary); }
.grade-card.grade-locked { background: #f0f0f0; color: #bbb; cursor: not-allowed; box-shadow: none; }
.grade-card.grade-locked:active { transform: none; }
.grade-card.grade-unlocked { background: linear-gradient(135deg, #e0f2f1, #fff); color: #00897b; }

/* ========== 奖励 XP 信息 ========== */
.reward-xp-info {
  display: flex; align-items: center; gap: 8px;
  background: #f5f0ff; padding: 8px 16px; border-radius: 20px;
  width: 100%; max-width: 340px; margin-bottom: 12px;
}
.reward-xp-gain { font-size: 14px; font-weight: 800; color: var(--primary); }
.reward-xp-bar {
  flex: 1; height: 6px; background: #ddd; border-radius: 3px; overflow: hidden;
}
.reward-xp-fill {
  height: 100%; background: linear-gradient(90deg, #7c4dff, #b388ff);
  border-radius: 3px; transition: width 0.5s ease;
}
.reward-xp-text { font-size: 11px; color: var(--text-light); min-width: 60px; text-align: right; }

/* ========== 奖励多卡展示 ========== */
.reward-cards {
  display: flex; gap: 12px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 12px;
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }