/* 词汇树页面 */
.t-body { background: var(--bg); }

.t-head {
  background:
    radial-gradient(900px 300px at 20% -70%, #eaf7ee 0%, rgba(234, 247, 238, 0) 65%),
    var(--card);
  border-bottom: 1px solid var(--line);
  padding: 18px 0 20px;
}
.t-topbar { display: flex; justify-content: space-between; gap: 14px; margin-bottom: 8px; }
.t-back { color: var(--ink-2); font-size: 13px; text-decoration: none; }
.t-back:hover { color: var(--accent); }
.t-head h1 { margin: 4px 0 4px; font-size: clamp(24px, 4vw, 32px); letter-spacing: -.02em; }
.t-sub { margin: 0; color: var(--ink-2); font-size: 13.5px; }

.t-main { padding: 22px 20px 40px; }

.t-stage-card {
  background: linear-gradient(180deg, #f7fbff 0%, #eef7f1 100%);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 14px 16px 8px;
  box-shadow: var(--shadow);
}
.t-styles {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 2px 0 6px;
}
.t-style {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .8);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  cursor: pointer;
  transition: all .15s ease;
}
.t-style:hover { border-color: #9ad7ae; color: #166534; }
.t-style.on {
  background: #e7f8ee;
  border-color: #9ad7ae;
  color: #14663f;
  font-weight: 600;
}
.t-canvas-wrap { position: relative; }
#t-tree {
  display: block;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  height: 400px;
}
#t-tree .crown { transform-box: fill-box; }
.t-stage-badge {
  position: absolute;
  top: 10px;
  left: 12px;
  font-size: 12.5px;
  font-weight: 600;
  color: #166534;
  background: #e7f8ee;
  border: 1px solid #cdeedd;
  border-radius: 999px;
  padding: 4px 12px;
}
.t-stage-desc {
  margin: 4px 6px 10px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
}

.t-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin: 16px 0 8px;
}
.t-stat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.t-stat-label { font-size: 12px; color: var(--ink-3); }
.t-stat-num { font-size: 24px; line-height: 1.2; letter-spacing: -.02em; }
.t-stat-sub { font-size: 11.5px; color: var(--ink-3); }

.t-levels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 4px;
}
.t-lv {
  flex: 1 1 140px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 9px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12.5px;
  color: var(--ink-2);
}
.t-lv b { font-size: 15px; color: var(--ink); }
.t-lv-tag {
  font-size: 11px;
  font-weight: 700;
  border-radius: 999px;
  padding: 1px 8px;
  background: #eef2f8;
  color: var(--ink-3);
}
.t-lv-tag.A1, .t-lv-tag.A2 { background: #e8f7ee; color: #15803d; }
.t-lv-tag.B1, .t-lv-tag.B2 { background: #e8f0ff; color: #1d4ed8; }

.t-section {
  margin: 26px 0 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
}
.t-section h2 { margin: 0 0 6px; font-size: 17px; }
.t-desc { margin: 0 0 12px; font-size: 13px; color: var(--ink-2); }

.t-spark {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 84px;
  padding-top: 6px;
  overflow-x: auto;
}
.t-bar {
  flex: 1 0 8px;
  min-width: 8px;
  max-width: 26px;
  background: linear-gradient(180deg, #4ade80, #16a34a);
  border-radius: 4px 4px 2px 2px;
  position: relative;
}
.t-bar.today { background: linear-gradient(180deg, #fbbf24, #f59e0b); }
.t-bar-none { font-size: 12.5px; color: var(--ink-3); }

.t-milestones { display: flex; flex-wrap: wrap; gap: 8px; }
.t-ms {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12.5px;
  color: var(--ink-3);
  background: #fafbfd;
}
.t-ms b { font-weight: 600; }
.t-ms.on {
  border-color: #bbf7d0;
  background: #f0fdf4;
  color: #15803d;
}
.t-ms.on .t-ms-dot { background: #16a34a; }
.t-ms-dot { width: 8px; height: 8px; border-radius: 50%; background: #d8dee9; }

.t-preview-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
#t-preview { flex: 1 1 200px; accent-color: var(--accent); }
.t-preview-val { font-size: 13px; color: var(--ink-2); min-width: 62px; }
.t-btn {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 12.5px;
  cursor: pointer;
}
.t-btn:hover { border-color: var(--accent); color: var(--accent); }

.t-faq { margin: 0; padding-left: 18px; color: var(--ink-2); font-size: 13px; line-height: 1.8; }
.t-faq b { color: var(--ink); }

.t-foot {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 16px 0 24px;
  font-size: 12px;
  color: var(--ink-3);
}
.t-foot a { color: var(--ink-2); }

@media (max-width: 640px) {
  .t-main { padding: 16px 14px 32px; }
  #t-tree { height: 330px; }
  .t-section { padding: 14px; }
  .t-stat-num { font-size: 20px; }
}