/* ==========================================================================
   问渠 WenQu —— 题库训练 / 每日一题（质感增强）
   仅供 study.html / daily.html 引入，在 css/style.css 之后加载。
   设计基调：墨色 + 铜金 · 书卷气质 · 纯排版
   （无 icon、无 CSS 自绘装饰图形、无「框内单字」标识，素材一律线上真实）
   ========================================================================== */

/* —— 页头小字 —— */
.wq-top-kicker {
  font-family: var(--display);
  font-weight: 600;
  font-size: .76rem;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 8px;
}
.study-top h2 { font-size: 1.9rem; }

/* —— 流程步骤条（纯排版数字，不进色块） —— */
.study-steps {
  gap: 16px;
  font-size: .9rem;
  margin-bottom: 40px;
}
.pay-step { display: flex; align-items: baseline; gap: 7px; }
.pay-step .n {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--muted);
  transition: color .2s ease;
}
.pay-step.done .n { color: var(--gold-deep); }
.pay-step.active { font-weight: 700; color: var(--ink); }
.pay-step.active .n { color: var(--gold-deep); }
.pay-sep { color: rgba(26, 35, 52, .18); }

/* —— 加载 / 空态 —— */
.wq-loading {
  text-align: center;
  padding: 72px 0 60px;
  color: var(--muted);
  animation: wq-pulse 1.4s ease-in-out infinite;
}
@keyframes wq-pulse { 0%, 100% { opacity: .45; } 50% { opacity: 1; } }
.wq-empty {
  text-align: center;
  padding: 72px 0 60px;
  color: var(--muted);
}
.wq-empty b { font-family: var(--serif); color: var(--ink); }

/* —— 选学科 —— */
.wq-zone-hint {
  text-align: center;
  color: var(--muted);
  font-size: .95rem;
  margin: 0 0 22px;
}
.wq-subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.wq-subject-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 22px 22px;
  cursor: pointer;
  font-family: var(--sans);
  color: var(--text);
  box-shadow: 0 1px 0 rgba(26, 35, 52, .04);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.wq-subject-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: var(--shadow-lg);
}
.wq-subject-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--ink);
  letter-spacing: .02em;
}
.wq-subject-desc {
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.65;
  flex: 1;
}
.wq-subject-cta {
  align-self: flex-start;
  font-family: var(--sans);
  font-weight: 700;
  font-size: .82rem;
  letter-spacing: .14em;
  color: var(--gold-deep);
  border-bottom: 1px solid rgba(184, 134, 59, .4);
  padding-bottom: 2px;
  margin-top: 6px;
  transition: color .18s ease, border-color .18s ease;
}
.wq-subject-card:hover .wq-subject-cta { color: var(--gold); border-color: var(--gold); }

/* —— 通用内容块 —— */
.wq-block {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 34px 30px;
}
.wq-block-head { text-align: center; margin-bottom: 22px; }
.wq-block-kicker {
  font-family: var(--display);
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 6px;
}
.wq-block-title { font-size: 1.4rem; margin: 0 0 6px; color: var(--ink); }
.wq-block-hint { color: var(--muted); font-size: .9rem; margin: 0; }

/* —— 选知识点 —— */
.wq-kp-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 26px;
}
.wq-chip {
  font-family: var(--sans);
  font-size: .94rem;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 20px;
  min-height: 44px;
  cursor: pointer;
  transition: border-color .16s ease, background .16s ease, color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.wq-chip:hover { border-color: var(--gold); transform: translateY(-1px); }
.wq-chip.selected {
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 18px rgba(184, 134, 59, .32);
}
.wq-kp-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px dashed var(--line);
  padding-top: 20px;
}
.wq-kp-count {
  font-family: var(--display);
  font-size: .92rem;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

/* —— 答题卡 —— */
.wq-sheet {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 24px 22px;
  margin-bottom: 18px;
}
.wq-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.wq-sheet-title { font-family: var(--serif); font-weight: 700; font-size: 1.02rem; color: var(--ink); }
.wq-sheet-meta {
  font-family: var(--display);
  font-size: .86rem;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
  letter-spacing: .03em;
}
.wq-sheet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 10px;
}
.wq-sheet-cell {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  font-family: var(--display);
  font-weight: 600;
  font-size: .92rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  transition: border-color .16s ease, background .16s ease, color .16s ease, transform .16s ease;
}
.wq-sheet-cell:hover { border-color: var(--gold); transform: translateY(-1px); }
.wq-sheet-cell.answered {
  background: rgba(184, 134, 59, .12);
  border-color: rgba(184, 134, 59, .5);
  color: var(--gold-deep);
}
.wq-sheet-cell.current {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184, 134, 59, .18);
  color: var(--gold-deep);
  background: #fff;
}
.wq-sheet-cell.ok {
  background: rgba(46, 125, 91, .12);
  border-color: rgba(46, 125, 91, .45);
  color: #1d6b43;
  cursor: default;
}
.wq-sheet-cell.bad {
  background: rgba(179, 68, 47, .1);
  border-color: rgba(179, 68, 47, .4);
  color: #a53a28;
  cursor: default;
}

/* —— 题目卡 —— */
.wq-quiz-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 36px 30px;
}
.wq-quiz-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.wq-q-tag {
  font-family: var(--sans);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .16em;
  color: var(--gold-deep);
}
.wq-q-pos {
  font-family: var(--display);
  font-weight: 700;
  font-size: .88rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}
.wq-q-text {
  font-family: var(--serif);
  font-size: 1.22rem;
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 26px;
}
.wq-options { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.wq-option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 15px 18px;
  font-family: var(--sans);
  font-size: .98rem;
  color: var(--text);
  cursor: pointer;
  transition: border-color .16s ease, background .16s ease, transform .16s ease, box-shadow .16s ease;
  min-height: 52px;
}
.wq-option:hover {
  border-color: var(--gold);
  background: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(184, 134, 59, .14);
}
.wq-option.selected {
  border-color: var(--gold);
  background: rgba(184, 134, 59, .1);
  box-shadow: inset 0 0 0 1px rgba(184, 134, 59, .28), 0 10px 24px rgba(184, 134, 59, .16);
}
.wq-option.correct {
  border-color: var(--ok);
  background: rgba(46, 125, 91, .1);
  box-shadow: inset 0 0 0 1px rgba(46, 125, 91, .25);
}
.wq-option.wrong {
  border-color: var(--danger);
  background: rgba(179, 68, 47, .09);
  box-shadow: inset 0 0 0 1px rgba(179, 68, 47, .22);
}
.wq-option.disabled { cursor: default; }
.wq-option.disabled:hover { transform: none; box-shadow: none; background: var(--paper); }
.wq-opt-key {
  flex: 0 0 auto;
  min-width: 1.7em;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--gold-deep);
}

/* —— 填空 —— */
.wq-fill { margin-bottom: 28px; }
.wq-fill-input {
  width: 100%;
  padding: 16px 18px;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--text);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color .16s ease, box-shadow .16s ease, background .16s ease;
}
.wq-fill-input:focus {
  outline: none;
  background: #fff;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184, 134, 59, .16);
}
.wq-fill-answer {
  margin-bottom: 28px;
  padding: 14px 16px;
  background: var(--paper);
  border-radius: 12px;
  color: var(--ink-soft);
  font-size: .95rem;
}

/* —— 题目底部导航 —— */
.wq-q-nav {
  display: flex;
  gap: 14px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}
.wq-q-nav .btn { min-width: 132px; }

/* —— 解析 —— */
.wq-analysis { display: flex; flex-direction: column; gap: 16px; }
.wq-a-summary {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 30px;
  text-align: center;
}
.wq-a-eyebrow {
  font-family: var(--display);
  font-weight: 600;
  font-size: .76rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 12px;
}
.wq-a-score {
  font-family: var(--display);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  margin: 0 0 8px;
  font-variant-numeric: tabular-nums;
}
.wq-a-score .wq-a-num { color: var(--gold-deep); }
.wq-a-score .wq-a-slash { font-size: .5em; color: var(--muted); }
.wq-a-praise { color: var(--muted); font-size: .96rem; margin: 0; }
.wq-a-note { color: var(--gold-deep); font-size: .86rem; margin: 10px 0 0; }
.wq-a-result {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.9rem;
  color: var(--ink);
  margin: 0 0 8px;
}
.wq-a-result.ok { color: var(--ok); }
.wq-a-result.bad { color: var(--danger); }
.wq-a-ans-line { color: var(--ink-soft); font-size: .95rem; margin: 0; }

.wq-a-item {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 28px;
  border-left: 4px solid var(--line);
}
.wq-a-item.ok { border-left-color: var(--ok); }
.wq-a-item.bad { border-left-color: var(--danger); }
.wq-a-item.pending { border-left-color: var(--gold); }
.wq-a-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.wq-a-status {
  font-family: var(--sans);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .12em;
}
.wq-a-item.ok .wq-a-status { color: var(--ok); }
.wq-a-item.bad .wq-a-status { color: var(--danger); }
.wq-a-item.pending .wq-a-status { color: var(--gold-deep); }
.wq-a-index {
  font-family: var(--display);
  font-size: .8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.wq-a-q {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.04rem;
  color: var(--ink);
  margin: 0 0 10px;
  line-height: 1.7;
}
.wq-a-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 10px;
  font-size: .9rem;
}
.wq-a-ans { color: var(--ink-soft); }
.wq-a-correct { color: var(--ok); font-weight: 700; }
.wq-a-parse {
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.85;
  margin: 0;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}
.wq-a-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 6px;
}

/* —— 每日一题 —— */
.wq-daily-head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.wq-daily-date {
  font-family: var(--display);
  font-weight: 600;
  font-size: .88rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}
.wq-daily-subject {
  font-family: var(--sans);
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold-deep);
}
.wq-daily-card { padding: 30px 34px 26px; }

/* —— 响应式 —— */
@media (max-width: 960px) {
  .wq-subject-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .wq-subject-grid { grid-template-columns: 1fr; }
  .wq-block, .wq-quiz-card, .wq-a-summary, .wq-a-item { padding: 24px 18px; }
  .wq-sheet-grid { grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); }
  .wq-q-text { font-size: 1.08rem; line-height: 1.75; }
  .wq-kp-foot { justify-content: center; text-align: center; }

  /* —— 题库训练 / 每日一题 移动端精修（≤640px） —— */
  .study-top h2 { font-size: 1.6rem; }
  .study-steps { font-size: .86rem; }
  .wq-subject-card { padding: 22px 20px; gap: 8px; }
  .wq-subject-name { font-size: 1.22rem; }
  .wq-subject-desc { font-size: .95rem; line-height: 1.75; }
  .wq-subject-cta { font-size: .84rem; }
  .wq-block-title { font-size: 1.28rem; }
  .wq-block-hint { font-size: .92rem; line-height: 1.7; }
  .wq-kp-chips { gap: 8px; }
  .wq-chip { font-size: .92rem; padding: 11px 16px; min-height: 46px; }
  .wq-kp-foot { gap: 12px; }
  .wq-kp-count { font-size: .92rem; }
  .wq-sheet { padding: 16px 14px; }
  .wq-sheet-grid { gap: 8px; }
  .wq-sheet-cell { min-height: 44px; font-size: .88rem; }
  .wq-quiz-card { padding: 24px 18px; }
  .wq-q-tag { font-size: .76rem; }
  .wq-option { padding: 14px 14px; font-size: .96rem; min-height: 48px; gap: 10px; }
  .wq-opt-key { font-size: .96rem; }
  .wq-fill-input { font-size: 1rem; padding: 14px 16px; }
  .wq-q-nav { gap: 10px; }
  .wq-q-nav .btn { min-width: 100%; }
  .wq-a-summary { padding: 28px 18px; }
  .wq-a-score { font-size: 2.2rem; }
  .wq-a-item { padding: 20px 16px; }
  .wq-a-q { font-size: 1rem; line-height: 1.7; }
  .wq-a-parse { font-size: .94rem; line-height: 1.8; }
  .wq-a-meta { font-size: .9rem; }
  .wq-a-actions { gap: 10px; }
  .wq-a-actions .btn { min-width: 100%; }
  .wq-daily-card { padding: 24px 18px; }
  .wq-daily-date { font-size: .84rem; }
  .wq-daily-subject { font-size: .74rem; }
}