/**
 * L13 Page 06 · 侦探复述（对齐 Page 03/04/05：全屏铺满、无滚动练习区）
 */

#l13-book .panel.panel-split {
  display: grid !important;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  align-items: stretch;
  min-height: 0;
  overflow: hidden;
}
@media (min-width: 640px) {
  #l13-book .panel.panel-split {
    grid-template-columns: minmax(200px, 46%) 1fr;
    gap: 0.85rem;
  }
}

#l13-book .panel.panel-split .stage-visual,
#l13-book .panel.panel-split .stage-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

#l13-book .panel.panel-split .stage-body {
  gap: 0.35rem;
}

#l13-book .scene-frame--intro,
#l13-book .scene-frame--split {
  flex: 1 1 auto;
  width: 100%;
  aspect-ratio: 4 / 3;
  min-height: clamp(180px, 34vh, 440px);
  max-height: min(62vh, 500px) !important;
  height: auto !important;
  background: linear-gradient(145deg, #eef2ff, #e0e7ff);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: 12px 18px 10px 16px;
  border: 3px solid var(--edge, #5d4037);
}

#l13-book .scene-frame--intro img,
#l13-book .scene-frame--split img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
}

#l13-book .panel-lead {
  font-weight: 800;
  margin: 0 0 0.2rem;
  line-height: 1.38;
  flex-shrink: 0;
  font-size: clamp(0.9rem, 1.15vw + 0.45rem, 1.08rem);
}

#l13-book .tier-label {
  background: var(--indigo-bg, #e0e7ff);
  color: var(--indigo-ink, #312e81);
}
#l13-book .tier-label.tier-b {
  background: #dbeafe;
  color: #1e40af;
}

#l13-book .rule-box.indigo {
  background: var(--indigo-bg, #e0e7ff);
  border-left: 5px solid var(--indigo, #4338ca);
  color: var(--indigo-ink, #312e81);
  flex-shrink: 0;
}
#l13-book .rule-box.violet {
  background: var(--perf-bg, #ede9fe);
  border-left: 5px solid var(--perf, #6d28d9);
  color: #4c1d95;
  flex-shrink: 0;
}

#l13-book .hl-had {
  background: var(--perf-bg, #ede9fe);
  color: var(--perf, #6d28d9);
  padding: 0 0.12rem;
  border-radius: 4px;
  font-weight: 900;
}

#l13-book .btn.indigo {
  background: linear-gradient(135deg, #6366f1, #4338ca);
  color: #fff;
  border-color: #3730a3;
  box-shadow: 0 3px 0 rgba(55, 48, 163, 0.28);
}

#l13-book .lesson-page.active > .panel:not(.panel-split) {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#l13-book .lesson-page.active > .panel.panel-split {
  flex: 1 1 auto;
  min-height: 0;
}

#l13-book .lesson-page .btn-row {
  flex-shrink: 0;
  margin-top: auto;
  padding-top: 0.35rem;
}

/* 屏 1 · 封面 */
#l13-book .panel-intro-retell {
  display: flex;
  flex-direction: column;
  min-height: 0;
  flex: 1 1 auto;
  overflow: hidden;
}
#l13-book .panel-intro-retell .scene-frame--intro {
  flex: 1 1 auto;
  max-height: none !important;
  min-height: min(72vh, 640px);
  aspect-ratio: auto;
}

/* 屏 2 · 复述支架 */
#l13-book .lesson-page[data-page="2"].active > .panel.panel-scaffold {
  overflow: hidden;
}
#l13-book .panel-scaffold .stage-body {
  gap: 0.28rem;
}
#l13-book #scaffold-grid {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(0.14rem, 0.38vh, 0.26rem);
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scroll-padding: 0.35rem;
}
#l13-book .scaffold-card {
  flex: 0 0 auto;
  min-height: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  align-content: flex-start;
  gap: clamp(0.2rem, 0.5vw, 0.35rem);
  padding: clamp(0.18rem, 0.55vh, 0.32rem) clamp(0.28rem, 0.7vw, 0.42rem);
  border-radius: 10px;
  border: 2px solid #c7d2fe;
  background: #fff;
  overflow: visible;
}
#l13-book .scaffold-card.had {
  border-color: #c4b5fd;
  background: #faf5ff;
}
#l13-book .scaffold-card.revealed {
  padding-bottom: clamp(0.28rem, 0.75vh, 0.45rem);
}
#l13-book .scaffold-card .step-num {
  flex: 0 0 1.5rem;
  font-weight: 900;
  font-size: clamp(0.68rem, 0.9vh + 0.24rem, 0.8rem);
  color: var(--indigo-ink, #312e81);
  background: var(--indigo-bg, #e0e7ff);
  border-radius: 8px;
  text-align: center;
  align-self: flex-start;
  min-height: 1.75rem;
  display: grid;
  place-items: center;
}
#l13-book .scaffold-card.had .step-num {
  background: var(--perf-bg, #ede9fe);
  color: var(--perf, #6d28d9);
}
#l13-book .scaffold-card .step-zh {
  flex: 1 1 auto;
  min-width: 0;
  font-weight: 800;
  font-size: clamp(0.66rem, 0.9vh + 0.24rem, 0.8rem);
  line-height: 1.28;
}
#l13-book .scaffold-card .btn-reveal-step {
  flex-shrink: 0;
  align-self: flex-start;
  min-height: clamp(26px, 3.2vh, 32px);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 2px solid var(--edge, #5d4037);
  background: #f8fafc;
  font-weight: 800;
  font-size: clamp(0.58rem, 0.75vh + 0.18rem, 0.68rem);
  cursor: pointer;
  font-family: inherit;
  touch-action: manipulation;
}
#l13-book .scaffold-card .step-en-wrap {
  flex: 1 1 100%;
  width: 100%;
  min-width: 0;
  display: none;
  padding-top: 0.12rem;
  overflow: visible;
}
#l13-book .scaffold-card.revealed .step-en-wrap {
  display: block;
}
#l13-book .scaffold-card .step-en-wrap .en-line {
  margin: 0;
  font-size: clamp(0.65rem, 0.88vh + 0.22rem, 0.78rem);
  line-height: 1.38;
  word-break: break-word;
  overflow-wrap: anywhere;
  white-space: normal;
}
#l13-book .scaffold-card .step-key {
  margin: 0 0 0.12rem;
  font-size: clamp(0.58rem, 0.72vh + 0.16rem, 0.68rem);
  color: #64748b;
  font-weight: 700;
  line-height: 1.32;
  word-break: break-word;
}

#l13-book #had-meaning-box {
  flex-shrink: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.15rem, 0.35vh, 0.25rem);
  max-height: 28%;
  min-height: 0;
  overflow: hidden;
}
@media (min-width: 640px) {
  #l13-book #had-meaning-box {
    grid-template-columns: 1fr 1fr;
  }
}
#l13-book .had-meaning-item {
  padding: clamp(0.2rem, 0.55vh, 0.35rem);
  border-radius: 10px;
  border: 2px solid #e9d5ff;
  background: #faf5ff;
  min-height: 0;
  overflow: hidden;
}
#l13-book .had-meaning-item .had-q {
  font-weight: 800;
  margin: 0 0 0.1rem;
  font-size: clamp(0.62rem, 0.82vh + 0.18rem, 0.72rem);
  line-height: 1.25;
}
#l13-book .had-meaning-item .fill-opts {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin: 0;
}
#l13-book .had-meaning-item .fill-opts button {
  min-height: clamp(24px, 3vh, 30px);
  padding: 0.12rem 0.35rem;
  font-size: clamp(0.58rem, 0.72vh + 0.16rem, 0.66rem);
  text-align: left;
  line-height: 1.2;
}
#l13-book .had-meaning-item .had-fb {
  margin: 0.08rem 0 0;
  font-size: clamp(0.56rem, 0.68vh + 0.14rem, 0.64rem);
  font-weight: 700;
  color: var(--ok, #047857);
}

/* 屏 3 · 朗读 */
#l13-book .lesson-page[data-page="3"].active > .panel.panel-read-story {
  overflow: hidden;
}
#l13-book .story-full {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: clamp(0.35rem, 0.9vh, 0.55rem);
  border-radius: 14px;
  border: 3px solid #c4b5fd;
  background: #faf5ff;
  font-weight: 700;
  line-height: 1.5;
  font-size: clamp(0.7rem, 1vh + 0.28rem, 0.88rem);
  margin: 0;
}
#l13-book .panel-read-story .zh-hint {
  flex-shrink: 0;
  margin: 0.2rem 0 0;
  font-size: clamp(0.66rem, 0.9vh + 0.22rem, 0.78rem);
}

/* 屏 4 · 填空（每题一屏） */
#l13-book .lesson-page[data-page="4"] {
  gap: 0.35rem;
}

#l13-book .lesson-page[data-page="4"].active > .panel.panel-fill-retell {
  overflow: hidden;
}

#l13-book .panel-fill-retell {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  gap: 0.25rem;
}

#l13-book .fill-slot,
#l13-book #fill-box {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  min-height: 0;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

#l13-book .lesson-page[data-page="4"] .fill-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
  max-width: 52rem;
  flex: 1 1 auto;
  min-height: 0;
  margin: 0 auto;
  padding: clamp(0.45rem, 1.8vh, 1rem) clamp(0.5rem, 2vw, 1.1rem);
  border-radius: 12px;
  border: 2px solid #e2e8f0;
  background: #fff;
  overflow: hidden;
}

#l13-book .fill-item.done {
  border-color: var(--ok, #047857);
  background: var(--ok-bg, #ecfdf5);
}

#l13-book .lesson-page[data-page="4"] .fill-item .fill-stem {
  font-weight: 800;
  margin: 0 0 clamp(0.3rem, 1.1vh, 0.65rem);
  font-size: clamp(0.92rem, 1.65vh + 0.38rem, 1.15rem);
  line-height: 1.38;
  text-align: center;
}

#l13-book .fill-blank {
  border-bottom: 3px dashed var(--indigo, #4338ca);
  padding: 0 0.12rem;
}

#l13-book .lesson-page[data-page="4"] .fill-opts {
  display: flex;
  flex-direction: column;
  gap: clamp(0.28rem, 0.85vh, 0.5rem);
  margin: 0;
  width: 100%;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

#l13-book .lesson-page[data-page="4"] .fill-opts button {
  flex: 0 0 auto;
  width: 100%;
  min-height: clamp(38px, 5.5vh, 50px);
  padding: clamp(0.28rem, 0.65vh, 0.45rem) clamp(0.45rem, 1vw, 0.7rem);
  border-radius: 999px;
  border: 2px solid #cbd5e1;
  background: #fff;
  font-weight: 800;
  font-size: clamp(0.82rem, 1.2vh + 0.32rem, 0.98rem);
  line-height: 1.32;
  cursor: pointer;
  font-family: inherit;
  touch-action: manipulation;
  text-align: center;
}

#l13-book .fill-opts button:disabled {
  cursor: default;
}

#l13-book .fill-opts button.ok {
  background: var(--ok-bg, #ecfdf5);
  border-color: var(--ok, #047857);
}

#l13-book .fill-opts button.bad {
  background: #fee2e2;
  border-color: #b91c1c;
}

#l13-book .lesson-page[data-page="4"] .fill-item .fill-fb {
  margin: clamp(0.2rem, 0.8vh, 0.45rem) 0 0;
  font-size: clamp(0.82rem, 1vh + 0.32rem, 0.98rem);
  font-weight: 700;
  color: var(--indigo-ink, #312e81);
  text-align: center;
  line-height: 1.35;
}

#l13-book .fill-item .fill-fb:empty {
  display: none;
}

#l13-book .fill-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  flex-shrink: 0;
}

#l13-book .fill-progress {
  font-weight: 900;
  font-size: clamp(0.82rem, 1.1vh + 0.32rem, 0.98rem);
  color: var(--indigo-ink, #312e81);
}

#l13-book .carousel-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  flex-shrink: 0;
}

#l13-book .carousel-dots button {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  border: 2px solid var(--edge, #5d4037);
  background: #fff;
  font-weight: 900;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: inherit;
  touch-action: manipulation;
}

#l13-book .carousel-dots button.active {
  background: var(--indigo, #4338ca);
  color: #fff;
  border-color: #3730a3;
}

#l13-book .fill-dots {
  flex: 1 1 auto;
  justify-content: flex-end;
  margin-top: 0;
  max-height: 4.5rem;
  overflow: hidden;
}

#l13-book .fill-dots button {
  width: 1.65rem;
  height: 1.65rem;
  font-size: 0.62rem;
}

#l13-book .fill-dots button.done {
  background: var(--ok-bg, #ecfdf5);
  border-color: var(--ok, #047857);
  color: var(--ok, #047857);
}

#l13-book .lesson-page[data-page="4"] .btn-row {
  padding-top: 0.2rem;
  flex-shrink: 0;
}

/* 屏 5 · 口头提纲 */
#l13-book .lesson-page[data-page="5"].active > .panel.panel-oral {
  overflow: hidden;
}
#l13-book .panel-oral {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  gap: 0.25rem;
}
#l13-book #oral-box {
  display: grid;
  grid-template-columns: 1fr;
  grid-auto-rows: 1fr;
  gap: clamp(0.15rem, 0.4vh, 0.28rem);
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}
@media (min-width: 720px) {
  #l13-book #oral-box {
    grid-template-columns: 1fr 1fr;
  }
}
#l13-book .oral-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 0;
  margin: 0;
  padding: clamp(0.22rem, 0.6vh, 0.38rem);
  border-radius: 12px;
  border: 3px solid #fde68a;
  background: #fffbeb;
  text-align: center;
  overflow: hidden;
}
#l13-book .oral-card.revealed {
  align-items: stretch;
  text-align: left;
}
#l13-book .oral-card .step-tag {
  font-size: clamp(0.58rem, 0.72vh + 0.16rem, 0.66rem);
  font-weight: 900;
  color: #92400e;
}
#l13-book .oral-card .zh-big {
  font-size: clamp(0.72rem, 1.05vh + 0.28rem, 0.88rem);
  font-weight: 900;
  color: #78350f;
  margin: 0.12rem 0;
  line-height: 1.3;
}
#l13-book .oral-card .btn-reveal {
  min-height: clamp(26px, 3.2vh, 32px);
  padding: 0.15rem 0.5rem;
  font-size: clamp(0.6rem, 0.75vh + 0.16rem, 0.68rem);
}
#l13-book .oral-card .en-reveal {
  display: none;
  margin-top: 0.2rem;
  padding: 0.25rem;
  border-radius: 8px;
  background: #fff;
  font-weight: 800;
  font-size: clamp(0.62rem, 0.82vh + 0.2rem, 0.74rem);
  line-height: 1.28;
}
#l13-book .oral-card.revealed .en-reveal {
  display: block;
}
#l13-book .oral-card.revealed .btn-reveal {
  display: none;
}

/* 屏 7 · 通道 */
#l13-book .panel-channel {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  flex: 1 1 auto;
  min-height: 0;
}
#l13-book .channel-btn {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0.5rem auto 0;
  min-height: 56px;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  border: 3px solid var(--edge, #5d4037);
  font-weight: 900;
  font-size: 1rem;
  text-align: center;
  text-decoration: none;
  color: var(--indigo-ink, #312e81);
  background: linear-gradient(135deg, #c7d2fe, #a5b4fc);
  box-sizing: border-box;
}
#l13-book .panel-channel .channel-links {
  margin-top: 0.75rem;
  font-size: 0.86rem;
  font-weight: 700;
  color: #64748b;
}
#l13-book .panel-channel .channel-links a {
  color: var(--indigo-ink, #312e81);
  font-weight: 900;
}