/* ===========================================================
   二年级下册第四章《四　数据分类（二）》· 动手互动实验室专属样式
   全部作用域收拢在 .b1lab-wrap.b4lab-wrap 内，无外链、保证 44px 触控热区
   =========================================================== */
.b1lab-wrap.b4lab-wrap {
  --b4-rose: #E11D48;
  --b4-rose-dark: #BE123C;
  --b4-rose-light: #FFE4E6;
  --b4-amber: #D97706;
  --b4-amber-light: #FEF3C7;
  --b4-sky: #2563EB;
  --b4-sky-dark: #1D4ED8;
  --b4-sky-light: #DBEAFE;
  --b4-teal: #0D9488;
  --b4-teal-light: #CCFBF1;
  --b4-plum: #7C3AED;
  --b4-plum-light: #EDE9FE;
}

.b1lab-wrap.b4lab-wrap button:focus-visible,
.b1lab-wrap.b4lab-wrap [tabindex]:focus-visible {
  outline: 3px solid #2563EB;
  outline-offset: 2px;
}

/* 顶部辅助工具栏与提示条 */
.b1lab-wrap.b4lab-wrap .b4-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.b1lab-wrap.b4lab-wrap .b4-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 900;
  background: #E6FBF5;
  color: #0F8A6D;
  border: 1.5px solid #BDEFE0;
}

.b1lab-wrap.b4lab-wrap.wisdom-mode .b4-status-pill {
  background: #EFEAFF;
  color: #5B38DF;
  border-color: #D4C8FF;
}

/* 待分物品托盘 */
.b1lab-wrap.b4lab-wrap .b4-tray {
  background: #FFFFFF;
  border: 2px dashed #CBD5E1;
  border-radius: 18px;
  padding: 12px;
  min-height: 82px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 9px;
}

.b1lab-wrap.b4lab-wrap .b4-tray-empty {
  font-size: 14.5px;
  font-weight: 800;
  color: #059669;
  padding: 8px 12px;
}

/* 通用可拖可点物品卡（纽扣、扑克牌、画片、标志、算式、名片） */
.b1lab-wrap.b4lab-wrap .b4-item-chip {
  min-width: 56px;
  min-height: 56px;
  padding: 6px;
  border-radius: 15px;
  background: #FFFFFF;
  border: 2.5px solid #E2E8F0;
  box-shadow: 0 4px 0 #CBD5E1;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  touch-action: none;
  cursor: grab;
  transition: transform 0.14s ease, border-color 0.14s ease, box-shadow 0.14s ease, background-color 0.14s ease;
  position: relative;
}

.b1lab-wrap.b4lab-wrap .draggable-chip {
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.b1lab-wrap.b4lab-wrap .b4-item-chip:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: #94A3B8;
}

.b1lab-wrap.b4lab-wrap .b4-item-chip.picked {
  background: #EFF6FF;
  border-color: #2563EB;
  box-shadow: 0 5px 0 #1D4ED8, 0 0 0 3px rgba(37, 99, 235, 0.22);
  transform: translateY(-4px) scale(1.04);
}

.b1lab-wrap.b4lab-wrap .b4-item-chip.marked-ok {
  background: #ECFDF5;
  border-color: #10B981;
  box-shadow: 0 3px 0 #059669;
}

.b1lab-wrap.b4lab-wrap .b4-item-chip.dimmed {
  opacity: 0.25;
  filter: grayscale(0.4);
}

.b1lab-wrap.b4lab-wrap .b4-mini-chip {
  min-width: 46px;
  min-height: 46px;
  padding: 4px;
  border-radius: 12px;
  background: #FFFFFF;
  border: 2px solid #CBD5E1;
  box-shadow: 0 2px 0 #CBD5E1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* 分类收纳盒网格 */
.b1lab-wrap.b4lab-wrap .b4-bins-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.b1lab-wrap.b4lab-wrap .b4-bin-card {
  background: #FFFFFF;
  border: 2.5px dashed #94A3B8;
  border-radius: 18px;
  padding: 11px 10px;
  min-height: 126px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  transition: border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
  cursor: pointer;
}

.b1lab-wrap.b4lab-wrap .b4-bin-card.bin-ready {
  border-color: #3B82F6;
  background: #F8FAFC;
}

.b1lab-wrap.b4lab-wrap .b4-bin-card.bin-filled {
  border-style: solid;
  border-color: #10B981;
  background: #F0FDF4;
}

.b1lab-wrap.b4lab-wrap .b4-bin-title {
  font-size: 15.5px;
  font-weight: 900;
  color: #1E293B;
  padding: 4px 12px;
  border-radius: 999px;
  background: #F1F5F9;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.b1lab-wrap.b4lab-wrap .b4-bin-items {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  min-height: 54px;
}

/* B2 课本红圈双层分支树（P41-42） */
.b1lab-wrap.b4lab-wrap .b4-tree-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.b1lab-wrap.b4lab-wrap .b4-oval-main {
  width: 100%;
  max-width: 520px;
  min-height: 92px;
  border: 3px solid #F43F5E;
  background: #FFF1F2;
  border-radius: 46px;
  padding: 12px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.b1lab-wrap.b4lab-wrap .b4-oval-tag {
  font-size: 14.5px;
  font-weight: 900;
  color: #BE123C;
  background: #FFFFFF;
  border: 1.5px solid #FDA4AF;
  padding: 3px 12px;
  border-radius: 999px;
}

.b1lab-wrap.b4lab-wrap .b4-branch-svg {
  width: 100%;
  max-width: 480px;
  height: 30px;
  display: block;
}

/* B3 扑克牌与画片样式 */
.b1lab-wrap.b4lab-wrap .b4-poker-card {
  width: 58px;
  height: 76px;
  border-radius: 11px;
  background: #FFFFFF;
  border: 2.5px solid #CBD5E1;
  box-shadow: 0 4px 0 #94A3B8;
  padding: 5px 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-weight: 900;
  touch-action: none;
  cursor: grab;
  transition: transform 0.14s ease, border-color 0.14s ease, box-shadow 0.14s ease;
}

.b1lab-wrap.b4lab-wrap .b4-poker-card.suit-red {
  color: #DC2626;
}

.b1lab-wrap.b4lab-wrap .b4-poker-card.suit-black {
  color: #1E293B;
}

.b1lab-wrap.b4lab-wrap .b4-poker-card.picked {
  border-color: #2563EB;
  background: #EFF6FF;
  box-shadow: 0 5px 0 #1D4ED8, 0 0 0 3px rgba(37, 99, 235, 0.22);
  transform: translateY(-4px);
}

/* B4 艺术节获奖名单卡片与涂格柱（P43） */
.b1lab-wrap.b4lab-wrap .b4-honor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.b1lab-wrap.b4lab-wrap .b4-award-card {
  min-height: 48px;
  padding: 8px 10px;
  border-radius: 13px;
  border: 2px solid #E2E8F0;
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

.b1lab-wrap.b4lab-wrap .b4-award-card.prize-0 {
  background: #FFFBEB;
  border-color: #FCD34D;
}

.b1lab-wrap.b4lab-wrap .b4-award-card.prize-1 {
  background: #F8FAFC;
  border-color: #CBD5E1;
}

.b1lab-wrap.b4lab-wrap .b4-award-card.prize-2 {
  background: #FFF7ED;
  border-color: #FDBA74;
}

.b1lab-wrap.b4lab-wrap .b4-award-card.picked-star {
  border-color: #E11D48;
  box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.22);
  transform: translateY(-2px);
}

/* B5 “正”字记分板（P44-45） */
.b1lab-wrap.b4lab-wrap .b4-survey-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}

.b1lab-wrap.b4lab-wrap .b4-survey-card {
  min-height: 50px;
  padding: 7px 9px;
  border-radius: 13px;
  background: #FFFFFF;
  border: 2px solid #CBD5E1;
  box-shadow: 0 3px 0 #CBD5E1;
  font-size: 14px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  cursor: pointer;
}

.b1lab-wrap.b4lab-wrap .b4-survey-card.done-card {
  background: #ECFDF5;
  border-color: #34D399;
  box-shadow: none;
  color: #065F46;
}

.b1lab-wrap.b4lab-wrap .b4-tally-board {
  background: #FFFFFF;
  border: 2.5px solid #E2D9CC;
  border-radius: 18px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.b1lab-wrap.b4lab-wrap .b4-tally-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 14px;
  background: #FAF8F5;
  border: 1.5px solid #E5DDD0;
  flex-wrap: wrap;
}

.b1lab-wrap.b4lab-wrap .b4-tally-label {
  min-width: 84px;
  font-size: 16px;
  font-weight: 900;
  color: #1E293B;
}

.b1lab-wrap.b4lab-wrap .b4-tally-canvas {
  flex: 1;
  min-width: 140px;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.b1lab-wrap.b4lab-wrap .b4-tally-btns {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* B6 涂色方格统计图（P45 课程表/楷书展） */
.b1lab-wrap.b4lab-wrap .b4-source-wall {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  margin-bottom: 14px;
}

.b1lab-wrap.b4lab-wrap .b4-wall-tile {
  min-height: 46px;
  padding: 6px 8px;
  border-radius: 12px;
  background: #FFFFFF;
  border: 2px solid #CBD5E1;
  font-size: 13.5px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  text-align: center;
}

.b1lab-wrap.b4lab-wrap .b4-wall-tile.checked-tile {
  background: #FEF9C3;
  border-color: #EAB308;
  text-decoration: underline;
}

.b1lab-wrap.b4lab-wrap .b4-paint-chart {
  background: #FFFFFF;
  border: 2.5px solid #E2E8F0;
  border-radius: 18px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.b1lab-wrap.b4lab-wrap .b4-paint-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.b1lab-wrap.b4lab-wrap .b4-paint-name {
  width: 78px;
  flex-shrink: 0;
  font-size: 14.5px;
  font-weight: 900;
  text-align: right;
  color: #1E293B;
}

.b1lab-wrap.b4lab-wrap .b4-paint-cells {
  display: flex;
  flex-wrap: nowrap;
  gap: 5px;
  overflow-x: auto;
  padding: 2px 0;
}

.b1lab-wrap.b4lab-wrap .b4-paint-sq {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 10px;
  border: 2px solid #CBD5E1;
  background: #F8FAFC;
  cursor: pointer;
  transition: transform 0.1s ease, background-color 0.12s ease, border-color 0.12s ease;
}

.b1lab-wrap.b4lab-wrap .b4-paint-sq.painted {
  background: linear-gradient(180deg, #FB7185 0%, #E11D48 100%);
  border-color: #BE123C;
  box-shadow: 0 2px 0 #9F1239;
}

/* B7 算式分拣机（P46 练习四 T3） */
.b1lab-wrap.b4lab-wrap .b4-eq-chip {
  min-width: 96px;
  min-height: 48px;
  padding: 8px 13px;
  border-radius: 14px;
  background: #FFFBEB;
  border: 2.5px solid #F59E0B;
  box-shadow: 0 4px 0 #D97706;
  font-size: 17px;
  font-weight: 900;
  color: #78350F;
  touch-action: none;
  cursor: grab;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.b1lab-wrap.b4lab-wrap .b4-eq-chip.picked {
  background: #DBEAFE;
  border-color: #2563EB;
  box-shadow: 0 5px 0 #1D4ED8, 0 0 0 3px rgba(37, 99, 235, 0.22);
  color: #1E3A8A;
  transform: translateY(-3px);
}

/* B8 & W3 二维交叉统计表与名片仓 */
.b1lab-wrap.b4lab-wrap .b4-profile-card {
  min-width: 108px;
  min-height: 54px;
  padding: 7px 10px;
  border-radius: 14px;
  background: #FFFFFF;
  border: 2.5px solid #CBD5E1;
  box-shadow: 0 4px 0 #94A3B8;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 13.5px;
  font-weight: 800;
  touch-action: none;
  cursor: grab;
}

.b1lab-wrap.b4lab-wrap .b4-profile-card.picked {
  background: #EFF6FF;
  border-color: #2563EB;
  box-shadow: 0 5px 0 #1D4ED8, 0 0 0 3px rgba(37, 99, 235, 0.22);
  transform: translateY(-3px);
}

.b1lab-wrap.b4lab-wrap .b4-matrix-wrap {
  overflow-x: auto;
  margin-top: 12px;
}

.b1lab-wrap.b4lab-wrap .b4-matrix-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 6px;
}

.b1lab-wrap.b4lab-wrap .b4-matrix-table th {
  background: #F1F5F9;
  border: 2px solid #CBD5E1;
  border-radius: 12px;
  padding: 8px 10px;
  font-size: 14.5px;
  font-weight: 900;
  color: #1E293B;
}

.b1lab-wrap.b4lab-wrap .b4-matrix-cell {
  background: #FFFFFF;
  border: 2.5px dashed #94A3B8;
  border-radius: 15px;
  padding: 9px;
  min-width: 118px;
  min-height: 86px;
  vertical-align: middle;
  text-align: center;
  cursor: pointer;
}

.b1lab-wrap.b4lab-wrap .b4-matrix-cell.cell-solid {
  border-style: solid;
  border-color: #CBD5E1;
  min-height: 58px;
  font-size: 20px;
  font-weight: 900;
  color: #0F172A;
}

.b1lab-wrap.b4lab-wrap .b4-ink-btn {
  min-width: 72px;
  min-height: 48px;
  padding: 8px 14px;
  border-radius: 14px;
  background: #1E1B4B;
  border: 2.5px solid #4338CA;
  box-shadow: 0 4px 0 #312E81;
  color: #FFFFFF;
  font-size: 15.5px;
  font-weight: 900;
}

.b1lab-wrap.b4lab-wrap .b4-ink-btn.active-ink {
  background: #4F46E5;
  border-color: #FDE047;
  box-shadow: 0 0 0 4px rgba(250, 204, 21, 0.45);
}

/* W1 韦恩双圈魔法阵 */
.b1lab-wrap.b4lab-wrap .b4-venn-arena {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.b1lab-wrap.b4lab-wrap .b4-venn-zone {
  min-height: 132px;
  border-radius: 22px;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

.b1lab-wrap.b4lab-wrap .b4-venn-left {
  background: rgba(219, 234, 254, 0.72);
  border: 2.5px solid #3B82F6;
}

.b1lab-wrap.b4lab-wrap .b4-venn-both {
  background: linear-gradient(180deg, #F3E8FF 0%, #FCE7F3 100%);
  border: 3px solid #9333EA;
  box-shadow: 0 4px 14px rgba(147, 51, 234, 0.14);
}

.b1lab-wrap.b4lab-wrap .b4-venn-right {
  background: rgba(254, 226, 226, 0.72);
  border: 2.5px solid #EF4444;
}

.b1lab-wrap.b4lab-wrap .b4-venn-out {
  margin-top: 10px;
  min-height: 76px;
  border-radius: 16px;
  background: #F8FAFC;
  border: 2px dashed #94A3B8;
  padding: 8px 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
}

/* W2 重叠报名表名牌合并 */
.b1lab-wrap.b4lab-wrap .b4-roster-row {
  background: #FFFFFF;
  border: 2px solid #E2E8F0;
  border-radius: 16px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.b1lab-wrap.b4lab-wrap .b4-kid-badge {
  min-height: 44px;
  padding: 7px 12px;
  border-radius: 12px;
  background: #F8FAFC;
  border: 2px solid #CBD5E1;
  font-size: 14.5px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.b1lab-wrap.b4lab-wrap .b4-kid-badge.dup-ready {
  background: #FEF3C7;
  border-color: #F59E0B;
  box-shadow: 0 3px 0 #D97706;
}

.b1lab-wrap.b4lab-wrap .b4-kid-badge.dup-picked {
  background: #EDE9FE;
  border-color: #7C3AED;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.25);
  transform: translateY(-2px);
}

.b1lab-wrap.b4lab-wrap .b4-kid-badge.merged-star {
  background: #DCFCE7;
  border-color: #16A34A;
  color: #14532D;
}

/* W4 和差分隔挡板台 */
.b1lab-wrap.b4lab-wrap .b4-compare-track {
  background: #FFFFFF;
  border: 2px solid #E2E8F0;
  border-radius: 18px;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.b1lab-wrap.b4lab-wrap .b4-strip-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.b1lab-wrap.b4lab-wrap .b4-strip-bar {
  min-height: 48px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 900;
  color: #FFFFFF;
}

@media (max-width: 600px) {
  .b1lab-wrap.b4lab-wrap .b4-honor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .b1lab-wrap.b4lab-wrap .b4-source-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .b1lab-wrap.b4lab-wrap .b4-venn-arena {
    grid-template-columns: minmax(0, 1fr);
  }
  .b1lab-wrap.b4lab-wrap .b4-bins-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .b1lab-wrap.b4lab-wrap .b4-paint-name {
    width: 64px;
    font-size: 13px;
  }
  .b1lab-wrap.b4lab-wrap .b4-paint-sq {
    width: 38px;
    height: 44px;
  }
  .b1lab-wrap.b4lab-wrap .b4-poker-card {
    width: 52px;
    height: 68px;
  }
  .b1lab-wrap.b4lab-wrap .b4-matrix-cell {
    min-width: 80px;
    min-height: 68px;
    padding: 6px 4px;
  }
  .b1lab-wrap.b4lab-wrap .b4-matrix-table th {
    padding: 6px 4px;
    font-size: 13px;
  }
  .b1lab-wrap.b4lab-wrap .b4-profile-card {
    min-width: 86px;
    min-height: 48px;
    padding: 5px 6px;
    font-size: 12.5px;
  }
  .b1lab-wrap.b4lab-wrap .b4-bin-title {
    font-size: 14px;
    padding: 3px 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .b1lab-wrap.b4lab-wrap *,
  .b1lab-wrap.b4lab-wrap *::before,
  .b1lab-wrap.b4lab-wrap *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}