.qz-page { padding-top: 18px; }
.qz-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.qz-header-card { margin-bottom: 18px; overflow: hidden; }
.qz-header-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: start;
}
.qz-kicker { color: var(--primary); font-size: 0.72rem; font-weight: 800; }
.qz-title {
  margin: 5px 0 0;
  color: var(--text);
  font-size: clamp(1.12rem, 2.2vw, 1.45rem);
  font-weight: 800;
  line-height: 1.28;
}
.qz-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}
.qz-pill {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  padding: 6px 9px;
  border-radius: 10px;
  background: var(--surface-variant, #f1f5f9);
  color: var(--text-tertiary);
  font-size: 0.7rem;
  line-height: 1;
}
.qz-pill strong { color: var(--text); font-size: 0.82rem; }
.qz-header-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--border-light);
  border-radius: 13px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}
.qz-progress {
  margin-top: 14px;
}
.qz-progress-track {
  height: 7px;
  border-radius: var(--radius-full);
  background: var(--border-light);
  overflow: hidden;
}
.qz-progress-track span {
  display: block;
  width: 1.2%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}
.qz-progress-foot {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 8px;
  color: var(--text-secondary);
  font-size: 0.72rem;
}
.qz-sheet-trigger {
  display: none;
  width: 100%;
  min-height: 40px;
  margin-top: 12px;
  padding: 0 12px;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--primary-border);
  border-radius: 12px;
  background: var(--primary-50);
  color: var(--primary);
  font-family: inherit;
  font-size: 0.76rem;
  font-weight: 800;
  cursor: pointer;
}
.qz-sheet-trigger span { display: inline-flex; align-items: center; gap: 7px; }
.qz-sheet-trigger b { font-size: 0.7rem; }
.qz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 16px;
  align-items: start;
}
.qz-stack { display: grid; gap: 16px; }
.qz-question-card { padding: 20px; }
.qz-question-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.qz-badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 2px 8px;
  border-radius: var(--r-full);
  background: var(--primary-50);
  color: var(--primary);
  font-size: 0.66rem;
  font-weight: 800;
  white-space: nowrap;
}
.qz-badge.hot { background: var(--warning-50); color: var(--warning-text); }
.qz-question {
  color: var(--text);
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 800;
  line-height: 1.65;
}
.qz-options {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}
.qz-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 54px;
  padding: 11px 12px;
  border: 1px solid var(--border-light);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
  font-family: inherit;
  cursor: default;
}
.qz-option b {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-variant, #f1f5f9);
  color: var(--primary);
}
.qz-option span {
  min-width: 0;
  font-size: 0.86rem;
  font-weight: 700;
}
.qz-option.correct {
  border-color: #bbf7d0;
  background: var(--success-50);
}
.qz-option.correct b { background: var(--success); color: #fff; }
.qz-option.wrong {
  border-color: #fecaca;
  background: var(--error-50);
}
.qz-option.wrong b { background: var(--error); color: #fff; }
.qz-result {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid var(--primary-border);
  border-radius: 14px;
  background: var(--primary-50);
}
.qz-result-title {
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 800;
}
.qz-result p {
  margin: 5px 0 0;
  color: var(--text-secondary);
  font-size: 0.76rem;
  line-height: 1.65;
}
.qz-growth {
  display: inline-flex;
  margin-top: 10px;
  padding: 5px 8px;
  border-radius: 10px;
  background: var(--success-50);
  color: var(--success-text);
  font-size: 0.68rem;
  font-weight: 800;
}
.qz-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 8px;
  margin-top: 16px;
}
.qz-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--border-light);
  border-radius: 13px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
}
.qz-action:disabled { cursor: default; opacity: 0.48; }
.qz-action.primary { border-color: var(--primary); background: var(--primary); color: #fff; }
.qz-link-card { padding: 18px; }
.qz-link-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}
.qz-link-title { margin: 0; color: var(--text); font-size: 1rem; font-weight: 800; }
.qz-link-desc { margin: 4px 0 0; color: var(--text-secondary); font-size: 0.74rem; line-height: 1.55; }
.qz-mini-list { display: grid; gap: 8px; margin-top: 14px; }
.qz-mini {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
}
.qz-mini strong { display: block; color: var(--text); font-size: 0.76rem; }
.qz-mini span { display: block; margin-top: 2px; color: var(--text-tertiary); font-size: 0.66rem; }
.qz-rail {
  display: grid;
  gap: 14px;
  position: sticky;
  top: 76px;
}
.qz-rail-card {
  padding: 16px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.qz-rail-title { color: var(--text); font-size: 0.9rem; font-weight: 800; }
.qz-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.qz-sheet-close {
  display: none;
  width: 34px;
  height: 34px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 1.1rem;
  cursor: pointer;
}
.qz-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}
.qz-stat {
  padding: 10px;
  border-radius: 12px;
  background: var(--surface-variant, #f1f5f9);
  text-align: center;
}
.qz-stat strong { display: block; color: var(--text); font-size: 1rem; line-height: 1.2; }
.qz-stat span { display: block; margin-top: 2px; color: var(--text-tertiary); font-size: 0.66rem; }
.qz-number-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 7px;
  margin-top: 12px;
}
.qz-range-pager {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 36px;
  gap: 8px;
  align-items: stretch;
  margin-top: 12px;
}
.qz-range-step {
  display: grid;
  min-width: 36px;
  min-height: 42px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  background: var(--surface);
  color: var(--primary);
  font-family: inherit;
  font-size: 1.2rem;
  font-weight: 800;
  cursor: pointer;
}
.qz-range-step:disabled {
  color: var(--text-tertiary);
  cursor: default;
  opacity: 0.46;
}
.qz-range-control {
  display: grid;
  min-width: 0;
  padding: 4px 9px;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  background: var(--surface-variant, #f1f5f9);
}
.qz-range-select {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 800;
  cursor: pointer;
  text-align: center;
  text-align-last: center;
}
.qz-range-page {
  color: var(--text-tertiary);
  font-size: 0.58rem;
  line-height: 1.2;
  text-align: center;
}
.qz-range-step:focus-visible,
.qz-range-select:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}
.qz-number {
  display: grid;
  width: 100%;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--border-light);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 800;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.qz-number:hover { border-color: var(--primary-border); }
.qz-number.correct {
  border-color: #bbf7d0;
  background: var(--success-50);
  color: var(--success-text);
}
.qz-number.wrong {
  border-color: #fecaca;
  background: var(--error-50);
  color: var(--error);
}
.qz-number.current {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 3px 8px rgba(37, 99, 235, 0.22);
}
.qz-number:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.qz-number-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 12px;
  color: var(--text-tertiary);
  font-size: 0.64rem;
}
.qz-number-legend span { display: inline-flex; align-items: center; gap: 4px; }
.qz-number-legend i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border);
}
.qz-number-legend .correct { background: var(--success); }
.qz-number-legend .wrong { background: var(--error); }
.qz-number-legend .current { background: var(--primary); }
.qz-sheet-backdrop { display: none; }
.qz-materials { border-color: var(--primary-border); background: var(--primary-50); }
.qz-materials p { margin: 8px 0 0; color: var(--text-secondary); font-size: 0.74rem; line-height: 1.6; }
.qz-materials-link { display: inline-flex; margin-top: 10px; color: var(--primary); font-size: 0.72rem; font-weight: 800; text-decoration: none; }
@media (max-width: 860px) {
  .qz-layout { grid-template-columns: 1fr; }
  .qz-rail { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 520px) {
  .qz-page { padding-top: 12px; }
  .qz-header-grid { grid-template-columns: 1fr; }
  .qz-header-action { display: none; }
  .qz-question-card { padding: 16px; }
  .qz-option { min-height: 50px; padding: 10px; }
  .qz-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .qz-action { min-height: 42px; padding: 0 8px; font-size: 0.72rem; }
  .qz-rail { grid-template-columns: 1fr; }
  .qz-link-head { flex-direction: column; }
  .qz-sheet-trigger { display: flex; }
  .qz-answer-sheet {
    position: fixed;
    z-index: 961;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    max-height: 78vh;
    margin: 0;
    padding: 18px 20px calc(22px + env(safe-area-inset-bottom));
    overflow-y: auto;
    border-right: none;
    border-bottom: none;
    border-left: none;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -14px 36px rgba(15, 23, 42, 0.16);
    visibility: hidden;
    transform: translateY(105%);
    transition: transform 0.24s ease, visibility 0.24s ease;
  }
  .qz-answer-sheet.is-open {
    visibility: visible;
    transform: translateY(0);
  }
  .qz-answer-sheet .qz-rail-title { font-size: 1rem; }
  .qz-answer-sheet .qz-number-grid { margin-top: 16px; gap: 9px; }
  .qz-sheet-close { display: grid; }
  .qz-sheet-backdrop {
    display: block;
    position: fixed;
    z-index: 960;
    inset: 0;
    border: 0;
    background: rgba(15, 23, 42, 0.42);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
  }
  .qz-sheet-backdrop.is-open { opacity: 1; visibility: visible; }
  body.qz-sheet-open { overflow: hidden; }
}
@media (prefers-reduced-motion: reduce) {
  .qz-answer-sheet,
  .qz-sheet-backdrop { transition: none; }
}