/* ==================== 高等数学为什么这么难 · 日常温馨风格 ==================== */
@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@400;500;600&display=swap');

:root {
  --bg-soft: #fff6e8;
  --card-soft: #fffaf2;
  --border-warm: #f3c28b;
  --accent-warm: #e09d32;
  --text-dark: #5c3e1f;
  --text-soft: #c28a4e;
}

* {
  font-family: 'Quicksand', 'Microsoft YaHei', 'PingFang SC', sans-serif !important;
}

/* 输出外层包装 */
.hr-wrap {
  background: linear-gradient(135deg, #fff6e8 0%, #fffaf2 100%);
  color: var(--text-dark);
  line-height: 1.9;
  font-size: 15px;
  padding: 28px 24px;
  border-radius: 40px;
  margin: 16px 0;
  border: 1px solid var(--border-warm);
  box-shadow: 0 20px 40px -12px rgba(200, 120, 60, 0.2);
  position: relative;
  overflow: hidden;
}

.hr-wrap::before {
  content: '📐';
  position: absolute;
  top: -20px;
  right: -20px;
  font-size: 120px;
  opacity: 0.03;
  pointer-events: none;
  transform: rotate(15deg);
}

/* 折叠框 */
details {
  background: rgba(255, 250, 240, 0.9);
  border: 1px solid var(--border-warm);
  border-radius: 24px;
  margin: 18px 0;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(200, 120, 60, 0.1);
}
details > summary {
  background: linear-gradient(135deg, var(--accent-warm), var(--border-warm));
  color: #fff;
  padding: 16px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  list-style: none;
  border-radius: 24px 24px 0 0;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::after {
  content: '▼';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.3s;
}
details[open] > summary::after { transform: translateY(-50%) rotate(180deg); }
details > div {
  padding: 22px;
  background: rgba(255, 255, 245, 0.95);
}

/* 思维链 */
.hr-cot-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hr-cot-item {
  display: flex;
  gap: 12px;
  padding: 4px 0;
  border-bottom: 1px dashed #ffd19b;
}
.hr-cot-label {
  color: var(--accent-warm);
  font-weight: 500;
  min-width: 90px;
}
.hr-cot-val {
  color: var(--text-dark);
}

/* 场景 */
.hr-scene {
  background: rgba(255, 245, 230, 0.8);
  color: var(--text-soft);
  font-size: 13px;
  padding: 12px 20px;
  border-radius: 60px;
  margin-bottom: 20px;
  border: 1px solid var(--border-warm);
  text-align: center;
}

/* 正文 */
.hr-text {
  margin: 18px 0;
  text-align: justify;
  background: rgba(255, 250, 235, 0.6);
  padding: 16px 20px;
  border-radius: 30px;
  border: 1px solid var(--border-warm);
}
.dialogue-wife {
  color: var(--accent-warm);
  font-weight: 500;
  font-style: italic;
  background: linear-gradient(to right, rgba(243, 194, 139, 0.2), transparent);
  padding: 2px 10px 2px 6px;
  border-radius: 30px;
  border-left: 3px solid var(--accent-warm);
}

/* 内心 */
.hr-think {
  color: var(--text-soft);
  font-style: italic;
  font-size: 14px;
  margin: 14px 0;
  padding: 12px 22px;
  background: #ffffffcc;
  border-radius: 40px;
  border: 1px solid var(--border-warm);
}

/* 分割线 */
.hr-div {
  border: none;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-warm), var(--accent-warm), var(--border-warm), transparent);
  margin: 28px 0;
}

/* 状态栏网格 */
.hr-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 20px;
  margin: 24px 0;
}
@media (max-width: 600px) {
  .hr-stats-grid { grid-template-columns: 1fr; }
}
.hr-panel {
  background: rgba(255, 250, 240, 0.85);
  border: 1px solid var(--border-warm);
  border-radius: 30px;
  padding: 20px 18px;
  box-shadow: 0 8px 0 #ffe0b5;
  transition: 0.2s;
}
.hr-panel:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 0 #ffd9a5;
  border-color: var(--accent-warm);
}
.hr-panel-h {
  color: var(--accent-warm);
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-warm);
}
.hr-stat-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 5px 0;
  font-size: 13px;
  border-bottom: 1px dashed #ffd19b;
}
.hr-stat-item:last-child { border-bottom: none; }
.hr-stat-label {
  color: var(--text-soft);
  font-weight: 500;
  min-width: 60px;
}
.hr-stat-value {
  color: var(--text-dark);
  text-align: right;
  flex: 1;
}

/* 行动选项 */
.hr-acts {
  background: rgba(255, 250, 240, 0.85);
  border: 1px solid var(--border-warm);
  border-radius: 40px;
  padding: 24px;
  margin-top: 24px;
  box-shadow: 0 8px 0 #ffe0b5;
}
.hr-acts-h {
  color: var(--accent-warm);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-warm);
  letter-spacing: 2px;
}
.hr-acts-i {
  padding: 8px 0 8px 12px;
  font-size: 14px;
  color: var(--text-dark);
  line-height: 1.7;
  border-bottom: 1px dashed #ffd19b;
  position: relative;
}
.hr-acts-i::before {
  content: '▹';
  color: var(--accent-warm);
  position: absolute;
  left: -5px;
}
.hr-acts-i:last-child {
  border-bottom: none;
}
.hr-acts-i:last-child::before { content: '✎'; }

/* 记忆回廊 */
.memory-details {
  background: rgba(255, 250, 240, 0.85);
  border: 1px solid var(--border-warm);
  border-radius: 30px;
  margin-top: 20px;
}
.memory-details summary {
  padding: 14px 22px;
  cursor: pointer;
  color: var(--accent-warm);
  font-weight: 600;
  font-size: 14px;
}
.memory-details[open] summary {
  border-bottom: 1px solid var(--border-warm);
}
.memory-inner {
  padding: 10px 22px 18px;
}
.memory-section {
  margin-bottom: 24px;
}
.memory-title {
  color: var(--accent-warm);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  border-left: 5px solid var(--accent-warm);
  padding-left: 14px;
}
.memory-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  color: var(--text-dark);
}
.memory-table th {
  text-align: left;
  padding: 8px 4px;
  border-bottom: 2px solid var(--border-warm);
  color: var(--accent-warm);
  font-weight: 600;
  background: rgba(255, 245, 230, 0.5);
}
.memory-table td {
  padding: 6px 4px;
  border-bottom: 1px dashed #ffd19b;
  vertical-align: top;
}

/* 补课小元素 */
.hr-wrap .math-symbol {
  font-family: monospace;
  background: #fff0e0;
  padding: 2px 6px;
  border-radius: 12px;
  color: var(--accent-warm);
}