/* ============================================
   运动急救小助手 — 扩展样式 v2
   全新明亮温暖配色 · 知识百科 · 统计面板 · 粒子动效
   ============================================ */

/* ==========================================
   🎨 全新配色方案 — 温暖活力风
   ========================================== */

:root {
  /* 背景 — 柔和暖白到浅蓝渐变 */
  --color-bg-start: #FFF5F5;
  --color-bg-mid: #F0F4FF;
  --color-bg-end: #E8F4FD;

  /* 主色 — 活力珊瑚橙 */
  --color-primary: #FF6B6B;
  --color-primary-light: #FF8E8E;

  /* 辅助色 — 清新青绿 */
  --color-secondary: #4ECDC4;
  --color-accent: #45B7D1;

  /* 功能色 */
  --color-success: #06D6A0;
  --color-warning: #FFD166;
  --color-danger: #EF476F;

  /* 卡片 */
  --color-card-bg: rgba(255, 255, 255, 0.85);
  --color-card-border: rgba(0, 0, 0, 0.08);

  /* 文字 */
  --color-text: #3D405B;
  --color-text-dim: #6C6F8A;
  --color-text-bright: #2D3436;

  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);

  /* 保留圆角和过渡 */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s ease;
}

/* ==========================================
   全局覆盖 — 背景、文字
   ========================================== */

body {
  background: linear-gradient(160deg, #FFF5F5 0%, #FEE2E2 15%, #F0F4FF 45%, #E8F4FD 75%, #F0FFF4 100%) !important;
  background-attachment: fixed !important;
  color: var(--color-text);
}

/* 渐变标题适配亮色 */
.gradient-title {
  background: linear-gradient(135deg, #FF6B6B, #4ECDC4, #45B7D1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-sub {
  color: var(--color-text-dim);
}

/* 导航栏 */
.top-nav a {
  color: var(--color-text-dim);
}
.top-nav a:hover {
  color: var(--color-primary);
}

/* 卡片 */
.card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}
.card:hover {
  box-shadow: 0 12px 36px rgba(255, 107, 107, 0.15);
  border-color: rgba(255, 107, 107, 0.2);
}
.card h3 {
  color: var(--color-text-bright);
}
.card p {
  color: var(--color-text-dim);
}
.card::after {
  background: radial-gradient(circle, rgba(255, 107, 107, 0.06), transparent 70%);
}

/* 按钮 */
.btn-primary {
  background: linear-gradient(135deg, #FF6B6B, #FF8E8E);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 107, 107, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(255, 107, 107, 0.35);
}

.btn-outline {
  background: transparent;
  border: 2px solid #FF6B6B;
  color: #FF6B6B;
}
.btn-outline:hover {
  background: rgba(255, 107, 107, 0.08);
}

.btn-danger {
  background: linear-gradient(135deg, #EF476F, #F4737B);
}
.btn-success {
  background: linear-gradient(135deg, #06D6A0, #2ED9A3);
  color: #fff;
}
.btn-warning {
  background: linear-gradient(135deg, #FFD166, #FFE08A);
  color: #3D405B;
}

/* 选项按钮 */
.option-btn {
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid rgba(0, 0, 0, 0.08);
  color: var(--color-text);
}
.option-btn:hover {
  border-color: #FF6B6B;
  background: rgba(255, 107, 107, 0.06);
  transform: translateX(4px);
}
.option-btn .opt-label {
  background: linear-gradient(135deg, #FF6B6B, #FF8E8E);
}

.option-btn.correct {
  border-color: #06D6A0;
  background: rgba(6, 214, 160, 0.1);
}
.option-btn.wrong {
  border-color: #EF476F;
  background: rgba(239, 71, 111, 0.1);
}

/* 进度条 */
.progress-bar {
  background: rgba(0, 0, 0, 0.06);
}
.progress-bar .progress-fill {
  background: linear-gradient(90deg, #FF6B6B, #4ECDC4);
}

/* 知识卡片反馈区 */
.knowledge-card {
  background: linear-gradient(135deg, rgba(239, 71, 111, 0.08), rgba(244, 115, 123, 0.05));
  border: 1px solid rgba(239, 71, 111, 0.2);
}
.knowledge-card.success {
  background: linear-gradient(135deg, rgba(6, 214, 160, 0.08), rgba(46, 217, 163, 0.05));
  border-color: rgba(6, 214, 160, 0.25);
}

/* 抽筋动画背景 */
.animation-box {
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* 严重程度指示条 */
.severity-bar .bar-seg {
  background: rgba(0, 0, 0, 0.06);
}

/* 状态标签 */
.status-tag.danger {
  background: rgba(239, 71, 111, 0.12);
  color: #EF476F;
}
.status-tag.success {
  background: rgba(6, 214, 160, 0.12);
  color: #06A880;
}
.status-tag.warning {
  background: rgba(255, 209, 102, 0.15);
  color: #C8960C;
}

/* 报表面板 */
.report-card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.03);
}
.report-card h3 {
  color: var(--color-text-bright);
}
.report-field {
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

/* 场景容器 */
.scene-desc {
  color: var(--color-text-dim);
}

/* 轮次指示器 */
.round-dot {
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-text-dim);
  border: 2px solid transparent;
}
.round-dot.active {
  background: linear-gradient(135deg, #FF6B6B, #FF8E8E);
  color: #fff;
  border-color: #FF8E8E;
  box-shadow: 0 0 16px rgba(255, 107, 107, 0.35);
}
.round-dot.done {
  background: #06D6A0;
  color: #fff;
}

/* 下一题按钮脉冲 */
#nextBtn {
  animation: pulseGlowV2 1.5s ease infinite;
}
@keyframes pulseGlowV2 {
  0%, 100% { box-shadow: 0 0 8px rgba(255, 107, 107, 0.25); }
  50% { box-shadow: 0 0 24px rgba(255, 107, 107, 0.5); }
}

/* 底部操作栏 */
.action-bar {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

/* 下拉框和输入框 */
select, input[type="text"] {
  background: rgba(255, 255, 255, 0.8) !important;
  border: 1px solid rgba(0, 0, 0, 0.1) !important;
  color: var(--color-text) !important;
}
select:focus, input[type="text"]:focus {
  border-color: #4ECDC4 !important;
  outline: none;
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.15);
}

/* 抽筋动画容器 */
.cramp-animation {
  background: rgba(0, 0, 0, 0.03);
}

/* 冰敷区域 */
#iceBox {
  background: rgba(69, 183, 209, 0.08) !important;
}

/* 成就勋章区域 */
#badgeArea {
  /* uses the parent's background from sprain.html inline style */
}

/* ==========================================
   🎉 粒子动效
   ========================================== */

@keyframes floatUp {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  50%  { opacity: 1; transform: translateY(-40px) scale(1.3); }
  100% { opacity: 0; transform: translateY(-80px) scale(0.8); }
}

@keyframes rippleOut {
  0%   { opacity: 0.8; transform: scale(0.3); }
  100% { opacity: 0;   transform: scale(1.2); }
}

/* ==========================================
   📚 知识百科区域
   ========================================== */

.knowledge-section {
  max-width: 800px;
  margin: 40px auto 0;
  text-align: center;
}

.knowledge-section h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text-bright);
  margin-bottom: 6px;
}

.knowledge-section .section-desc {
  color: var(--color-text-dim);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

/* 知识卡片（可展开） */
.knowledge-accordion {
  text-align: left;
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.knowledge-accordion .ka-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 22px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.knowledge-accordion .ka-header:hover {
  border-color: #4ECDC4;
  background: rgba(78, 205, 196, 0.06);
  box-shadow: 0 4px 16px rgba(78, 205, 196, 0.12);
  transform: translateY(-1px);
}

.knowledge-accordion .ka-header:active {
  transform: scale(0.98);
}

.knowledge-accordion.open .ka-header {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border-color: #4ECDC4;
  background: rgba(78, 205, 196, 0.06);
}

.knowledge-accordion .ka-icon {
  font-size: 2rem;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

.knowledge-accordion.open .ka-icon {
  transform: scale(1.15);
}

.knowledge-accordion .ka-title {
  flex: 1;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text-bright);
}

.knowledge-accordion .ka-arrow {
  font-size: 1.1rem;
  color: var(--color-text-dim);
  transition: transform var(--transition-normal);
}

.knowledge-accordion.open .ka-arrow {
  transform: rotate(180deg);
  color: #4ECDC4;
}

.knowledge-accordion .ka-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.45s ease;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  border-left: 1px solid rgba(78, 205, 196, 0.2);
  border-right: 1px solid rgba(78, 205, 196, 0.2);
  border-bottom: 1px solid rgba(78, 205, 196, 0.2);
}

.knowledge-accordion.open .ka-body {
  max-height: 700px;
  padding: 20px 22px;
}

.knowledge-accordion .ka-body .ka-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
  padding: 12px 16px;
  background: rgba(78, 205, 196, 0.05);
  border-radius: var(--radius-sm);
  border-left: 3px solid #4ECDC4;
  transition: transform var(--transition-fast);
}

.knowledge-accordion .ka-body .ka-step:hover {
  transform: translateX(3px);
  background: rgba(78, 205, 196, 0.1);
}

.knowledge-accordion .ka-body .ka-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4ECDC4, #45B7D1);
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.knowledge-accordion .ka-body .ka-step-text {
  color: var(--color-text);
  font-size: 0.93rem;
  line-height: 1.65;
}

.knowledge-accordion .ka-body .ka-tip {
  margin-top: 14px;
  padding: 12px 16px;
  background: rgba(255, 209, 102, 0.15);
  border-radius: var(--radius-sm);
  border-left: 3px solid #FFD166;
  font-size: 0.9rem;
  color: #B8860B;
  line-height: 1.55;
}

/* ==========================================
   📊 答题统计面板
   ========================================== */

.stats-panel {
  max-width: 800px;
  margin: 40px auto 0;
  text-align: center;
}

.stats-panel h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 18px;
}

.stats-cards {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.stat-card {
  flex: 1;
  min-width: 130px;
  max-width: 200px;
  padding: 24px 18px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
}

.stat-card .stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #FF6B6B, #4ECDC4);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  margin-top: 6px;
}

.stat-card .stat-emoji {
  font-size: 2rem;
  margin-bottom: 6px;
}

/* ==========================================
   ✨ 入场动画
   ========================================== */

.ka-stagger-1 { animation: fadeSlideIn 0.5s ease 0.05s both; }
.ka-stagger-2 { animation: fadeSlideIn 0.5s ease 0.12s both; }
.ka-stagger-3 { animation: fadeSlideIn 0.5s ease 0.19s both; }
.ka-stagger-4 { animation: fadeSlideIn 0.5s ease 0.26s both; }
.ka-stagger-5 { animation: fadeSlideIn 0.5s ease 0.33s both; }
.ka-stagger-6 { animation: fadeSlideIn 0.5s ease 0.40s both; }
.ka-stagger-7 { animation: fadeSlideIn 0.5s ease 0.47s both; }

@keyframes fadeSlideIn {
  0% { opacity: 0; transform: translateY(12px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* 统计数字脉冲 */
.stats-panel .stat-num.updated {
  animation: numPopIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes numPopIn {
  0%   { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1);   opacity: 1; }
}