/* 小学英语互动课件 — 外研新版教材风格 */
@import url('fltrp-theme.css');
@import url('responsive.css');

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font);
  background-color: var(--fltrp-cream);
  background-image: radial-gradient(circle, rgba(255, 200, 120, 0.35) 1.2px, transparent 1.2px);
  background-size: 18px 18px;
  min-height: 100vh;
  color: var(--text);
  line-height: 1.6;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 0% 0%, rgba(108, 194, 74, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(255, 143, 31, 0.08), transparent 50%);
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--fltrp-green) 0%, var(--fltrp-green) 35%, var(--fltrp-orange) 100%);
  z-index: 1000;
  pointer-events: none;
}

/* 分册主页专属背景图：40% 透明 + 5px 高斯模糊 */
body.grade-index {
  background-image: none;
}

body.grade-index::before {
  display: none;
}

.grade-bg {
  position: fixed;
  inset: -24px;
  z-index: -2;
  background: url('../images/grade-bg.png') center / cover no-repeat;
  opacity: 0.4;
  filter: blur(5px);
  transform: translateZ(0);
  pointer-events: none;
}

.grade-index .container {
  position: relative;
  z-index: 1;
}

.page-enter {
  animation: fadeSlideUp 0.55s var(--ease) both;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes pop {
  0% { transform: scale(0.92); opacity: 0; }
  70% { transform: scale(1.02); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes starPop {
  0% { transform: scale(0) rotate(-20deg); }
  100% { transform: scale(1) rotate(0); }
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

/* 顶栏 */
.top-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 8px;
}

.course-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
  line-height: 0;
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
}

.course-logo img {
  height: 38px;
  width: auto;
  max-width: min(210px, 46vw);
  object-fit: contain;
  display: block;
}

.course-logo--hero img {
  height: 48px;
  max-width: min(260px, 72vw);
}

.top-bar .back-link {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
}

.top-bar .page-title {
  grid-column: 1 / -1;
  grid-row: 2;
  justify-self: center;
  text-align: center;
  margin: 0;
}

.top-bar:not(:has(.page-title)) {
  grid-template-rows: auto;
}

.top-bar:not(:has(.page-title)) .back-link {
  grid-column: 2;
  grid-row: 1;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--fltrp-green-dark);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 9px 16px;
  background: var(--fltrp-paper);
  border: 2px solid rgba(108, 194, 74, 0.25);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.back-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--fltrp-green);
}

.page-title {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--fltrp-green-dark);
  letter-spacing: -0.02em;
}

.page-title i {
  margin-right: 10px;
  color: var(--fltrp-orange);
}

/* 卡片 */
.card {
  background: var(--fltrp-paper);
  border: 3px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title i { color: var(--fltrp-orange); }

/* 导航主页 */
.hero {
  text-align: center;
  padding: 28px 16px 24px;
}

.hero .course-logo--hero {
  display: inline-flex;
  justify-content: center;
  margin: 0 auto 14px;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fltrp-yellow);
  -webkit-text-stroke: 2.5px #fff;
  paint-order: stroke fill;
  filter: drop-shadow(0 3px 0 rgba(45, 106, 46, 0.15));
  margin-bottom: 10px;
}

.hero .mascot {
  font-size: 3.5rem;
  animation: bounce 3s ease-in-out infinite;
  display: block;
  margin-bottom: 12px;
  filter: drop-shadow(0 6px 12px rgba(108, 194, 74, 0.25));
}

.hero p {
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-cn);
  color: var(--text-muted);
}

.section-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 600;
  margin: 32px 0 18px;
  padding: 8px 18px 8px 14px;
  background: linear-gradient(90deg, var(--fltrp-orange), #ffb347);
  color: #fff;
  border-radius: 0 14px 14px 0;
  box-shadow: 0 3px 0 rgba(232, 111, 0, 0.35);
  border: none;
}

.section-title i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
  font-size: 0.85rem;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.nav-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--fltrp-paper);
  border: 3px solid rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  box-shadow: var(--shadow);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.nav-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 5px;
  border-radius: 0 4px 4px 0;
  background: var(--fltrp-green);
  opacity: 0.85;
}

.nav-card.learn::before { background: var(--fltrp-orange); }
.nav-card.game::before { background: var(--unit-3); }
.nav-card.test::before { background: var(--unit-5); }

.nav-card:hover {
  transform: translateY(-4px) translateX(2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(108, 194, 74, 0.35);
}

.nav-card .icon {
  font-size: 1.75rem;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--primary-soft);
}

.nav-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
  color: var(--fltrp-green-dark);
}

.nav-card p {
  font-size: 0.85rem;
  line-height: 1.55;
  font-family: var(--font-cn);
  color: var(--text-muted);
}

.nav-card.learn .icon { background: #fff3e0; color: var(--fltrp-orange); }
.nav-card.game .icon { background: #e8eaf6; color: var(--unit-3); }
.nav-card.test .icon { background: #e8f5e9; color: var(--unit-5); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border: none;
  border-radius: 12px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), filter 0.2s;
  box-shadow: var(--shadow-btn);
  user-select: none;
}

.btn:hover { transform: translateY(-2px); filter: brightness(1.05); }
.btn:active {
  transform: translateY(0);
  filter: brightness(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--fltrp-orange), #ffb347);
  color: #fff;
}
.btn-secondary {
  background: linear-gradient(135deg, var(--fltrp-green), #8fd96e);
  color: #fff;
}
.btn-success {
  background: linear-gradient(135deg, var(--unit-5), #66bb6a);
  color: #fff;
}
.btn-danger {
  background: linear-gradient(135deg, var(--unit-6), #ff8a80);
  color: #fff;
}
.btn-outline {
  background: rgba(255, 255, 255, 0.9);
  color: var(--fltrp-green-dark);
  border: 2px solid rgba(108, 194, 74, 0.35);
  box-shadow: none;
}

.btn-sm { min-height: 36px; padding: 7px 14px; font-size: 0.88rem; border-radius: 10px; }
.btn-lg { min-height: 52px; padding: 14px 28px; font-size: 1.05rem; border-radius: 14px; }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

/* 表单控件 */
select, input[type="text"] {
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 14px;
  border: 2px solid rgba(108, 194, 74, 0.22);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  min-height: 44px;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

select:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 194, 74, 0.15);
}

.control-row label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

/* 单词标签列表 */
.word-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.word-tab {
  padding: 7px 14px;
  border-radius: 10px;
  border: 2px solid rgba(108, 194, 74, 0.2);
  background: rgba(255, 255, 255, 0.85);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.22s var(--ease);
}

.word-tab:hover, .word-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(108, 194, 74, 0.3);
}

.word-tab.familiar {
  border-color: rgba(16, 185, 129, 0.35);
  background: #ecfdf5;
  color: #047857;
}

.word-tab.familiar.active {
  background: var(--green-dark);
  color: #fff;
}

/* 单词展示区 */
.word-display {
  text-align: center;
}

.word-image {
  width: min(100%, 360px);
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--cream);
}

/* 单词学习：图片 / 四线格描红切换 */
.word-media {
  margin-bottom: 16px;
}

.media-toggle {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: rgba(15, 23, 42, 0.05);
  border-radius: 12px;
  margin-bottom: 12px;
}

.media-tab {
  border: none;
  background: transparent;
  padding: 8px 16px;
  border-radius: 9px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.22s var(--ease);
}

.media-tab.active {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.four-line-sheet {
  width: min(100%, 640px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: var(--glass-border);
  background: #fff;
  touch-action: none;
}

.media-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#traceCanvas {
  display: block;
  width: 100%;
  cursor: crosshair;
  touch-action: none;
}

.trace-toolbar {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
}

.trace-hint {
  font-size: 0.85rem;
  color: #b2bec3;
  text-align: center;
  margin-top: 8px;
}

/* 单词抄写作业单（纸质/PDF） */
.copy-workbook {
  max-width: 210mm;
  margin: 0 auto;
  padding: 1.2cm 15mm 15mm;
  box-sizing: border-box;
  background: #fff;
}

.copy-card {
  padding: 16px 0;
  overflow-x: auto;
}

.copy-unit-header {
  text-align: center;
  margin-bottom: 18px;
}

.copy-unit-header h2 {
  font-size: 1.15rem;
  color: #2d3436;
  margin-bottom: 6px;
}

.copy-unit-hint {
  font-size: 0.85rem;
  color: #b2bec3;
}

.copy-sheet {
  max-width: 210mm;
  margin: 0 auto 20px;
  padding-bottom: 16px;
  border-bottom: 1px dashed #dfe6e9;
  break-inside: avoid;
  page-break-inside: avoid;
}

.copy-sheet:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.copy-word-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
}

.copy-word-title {
  font-family: "Patrick Hand", cursive;
  font-size: 1.5rem;
  color: var(--blue-dark);
  letter-spacing: 1px;
}

.copy-word-cn {
  font-size: 0.95rem;
  color: #636e72;
}

.copy-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  font-size: 0.88rem;
  color: #636e72;
  margin-bottom: 14px;
}

.copy-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.copy-legend .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.copy-legend .dot.trace { background: rgba(144, 202, 249, 0.9); }
.copy-legend .dot.write { background: #fff; border: 2px solid var(--blue); }

.copy-phoneme-row {
  border: 2px solid var(--purple);
  border-radius: 12px;
  padding: 8px 10px;
  background: #fff;
  margin-bottom: 10px;
}

.copy-phoneme-row .phoneme-boxes {
  margin: 0;
}

.copy-phoneme-row .phoneme-box {
  min-width: 44px;
  height: 44px;
  font-size: 0.9rem;
  cursor: default;
  color: color-mix(in srgb, var(--purple) 50%, white);
}

.copy-phoneme-row .phoneme-box.silent {
  color: color-mix(in srgb, #94a3b8 50%, white);
}

.copy-phoneme-row .phoneme-box:hover {
  background: rgba(255, 255, 255, 0.9);
  color: color-mix(in srgb, var(--purple) 50%, white);
  transform: none;
  box-shadow: none;
}

.copy-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.copy-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.copy-cell {
  position: relative;
  border: 2px solid var(--blue);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.copy-line-grid {
  position: relative;
  height: 31mm;
  width: 100%;
}

.copy-line-grid .dl-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  margin: 0;
  padding: 0;
  border: none;
  display: block;
}

.copy-line-grid .dl-top { top: 25%; border-top: 1.5px solid #90CAF9; }
.copy-line-grid .dl-mid { top: 41.5%; border-top: 1.5px dashed rgba(33, 150, 243, 0.32); }
.copy-line-grid .dl-grass { top: 58%; border-top: 2.5px solid #90CAF9; }
.copy-line-grid .dl-base { top: 75%; border-top: 1.5px solid #EF9A9A; }

.copy-trace-text {
  position: absolute;
  left: 50%;
  top: 58%;
  transform: translate(-50%, calc(1.1mm - 100%));
  font-family: "Patrick Hand", cursive;
  font-weight: 700;
  font-size: 2.58rem;
  color: rgba(144, 202, 249, 0.55);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
  line-height: 1;
}

.copy-cell-tag {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  pointer-events: none;
  z-index: 1;
}

.copy-cell--trace .copy-cell-tag {
  background: rgba(144, 202, 249, 0.35);
  color: #1565c0;
}

.copy-cell--write .copy-cell-tag {
  background: #f1f2f6;
  color: #636e72;
}

.copy-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

@media (max-width: 520px) {
  .copy-row {
    grid-template-columns: 1fr;
  }
}

@media print {
  .top-bar, .control-row, .word-tabs, .copy-toolbar, .copy-legend, .no-print,
  .dictation-toolbar, .dictation-play, .copy-cell-tag, .copy-speak,
  .dictation-answer {
    display: none !important;
  }
  html,
  body.dictation-print-body,
  body.copy-print-body {
    margin: 0 !important;
    padding: 0 !important;
  }
  body.dictation-print-body,
  body.copy-print-body {
    background: #fff;
  }
  body.copy-print-body {
    page: copy-homework;
  }
  body.dictation-print-body .container,
  body.copy-print-body .container {
    max-width: none;
    padding: 0 !important;
    margin: 0 !important;
  }
  body.dictation-print-body .card,
  body.copy-print-body .card,
  body.copy-print-body .card.copy-card {
    box-shadow: none !important;
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    break-inside: auto !important;
    page-break-inside: auto !important;
  }
  body.copy-print-body .copy-workbook {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
    box-sizing: border-box;
  }
  .copy-unit-header {
    margin-bottom: 14px;
  }
  .copy-sheet {
    border-bottom: 1px solid #eee;
    margin-bottom: 6mm;
    padding-bottom: 5mm;
  }
  .copy-phoneme-row .phoneme-box {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .copy-trace-text {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .copy-all-panel .copy-sheet {
    break-inside: avoid;
    page-break-inside: avoid;
  }
  .dictation-page {
    box-shadow: none;
    margin: 0;
    page-break-after: always;
    width: 210mm !important;
    min-height: 297mm;
    padding: 10mm 12mm 12mm !important;
    box-sizing: border-box;
  }
  .dictation-page:last-child {
    page-break-after: auto;
  }
  .dictation-page-hd {
    margin-bottom: 6mm !important;
  }
  .dictation-cols {
    column-gap: 8mm !important;
  }
  .dictation-item {
    margin-bottom: 9mm !important;
    min-height: 25mm !important;
  }
  .dictation-item-body {
    gap: 3mm !important;
    width: 100% !important;
  }
  .dictation-img {
    width: 25mm !important;
    height: 20mm !important;
    max-width: 25mm;
    max-height: 20mm;
    flex-shrink: 0 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .dictation-lines {
    height: 22mm !important;
    flex: 1;
  }
}

/* 听写页 A4 双栏（边距由 .dictation-page 内边距控制，避免打印缩放） */
@page {
  size: A4;
  margin: 0;
}

/* 单词抄写作业：@page 页边距（每页均生效，比 padding 更可靠） */
@page copy-homework {
  size: A4;
  margin: 1.2cm 15mm 15mm 15mm;
}

.dictation-card {
  padding: 16px 0;
  overflow-x: auto;
}

.dictation-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.dictation-page {
  width: 210mm;
  min-height: 297mm;
  padding: 10mm 12mm 12mm;
  background: #fff;
  box-shadow: var(--shadow);
  box-sizing: border-box;
}

.dictation-page-hd {
  text-align: center;
  font-size: 11pt;
  font-weight: 700;
  margin: 0 0 6mm;
  color: #2d3436;
}

.dictation-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 8mm;
  align-items: start;
}

.dictation-col {
  min-width: 0;
  overflow: visible;
}

.dictation-item {
  margin-bottom: 9mm;
  min-height: 25mm;
  break-inside: avoid;
  page-break-inside: avoid;
}

.dictation-item-body {
  display: flex;
  align-items: center;
  gap: 3mm;
  width: 100%;
  min-width: 0;
  position: relative;
}

.dictation-play {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 50%;
  background: var(--blue-dark);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  transition: transform 0.15s;
  flex-shrink: 0;
}

.dictation-play:hover {
  transform: scale(1.06);
}

.dictation-img {
  width: 25mm;
  height: 20mm;
  object-fit: cover;
  border-radius: 4px;
  border: 1.5px solid #dfe6e9;
  flex-shrink: 0;
  background: #f8f9fa;
}

/* 听写四线格：与抄写作业同比例，格带占高 50% 居中，便于纸上书写 */
.dictation-lines {
  position: relative;
  flex: 1;
  height: 22mm;
  min-width: 0;
}

.dictation-lines .dl-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  margin: 0;
  padding: 0;
  border: none;
  display: block;
}

.dictation-lines .dl-top { top: 25%; border-top: 1.5px solid #90CAF9; }
.dictation-lines .dl-mid { top: 41.5%; border-top: 1.5px dashed rgba(33, 150, 243, 0.32); }
.dictation-lines .dl-grass { top: 58%; border-top: 2.5px solid #90CAF9; }
.dictation-lines .dl-base { top: 75%; border-top: 1.5px solid #EF9A9A; }

.dictation-answer {
  display: none;
  position: absolute;
  left: 50%;
  top: 58%;
  transform: translate(-50%, calc(1.1mm - 100%));
  font-family: "Patrick Hand", cursive;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--blue-dark);
  white-space: nowrap;
  pointer-events: none;
  z-index: 1;
  line-height: 1;
}

body.show-dictation-answers .dictation-answer {
  display: block;
}

.dl-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  margin: 0;
  padding: 0;
  border: none;
  display: block;
}

.dl-top { top: 0; border-top: 1.5px solid #90CAF9; }
.dl-mid { top: 33%; border-top: 1.5px dashed rgba(33, 150, 243, 0.32); }
.dl-grass { top: 67%; border-top: 2.5px solid #90CAF9; }
.dl-base { top: 100%; border-top: 1.5px solid #EF9A9A; }

.dictation-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

@media screen and (max-width: 800px) {
  .dictation-page {
    width: 100%;
    min-height: auto;
    padding: 16px;
  }
  .dictation-cols {
    grid-template-columns: 1fr;
  }
}

.word-text {
  font-size: clamp(1.85rem, 5.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 12px 0;
}

.phoneme-boxes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 16px 0;
}

.phoneme-box.wide { min-width: 68px; font-size: 0.9rem; }

.phoneme-gap {
  width: 12px;
  flex-shrink: 0;
}

.phoneme-box.silent {
  border-color: rgba(148, 163, 184, 0.4);
  color: #94a3b8;
  background: #f8fafc;
  font-size: 1.1rem;
}

.phoneme-box {
  min-width: 52px;
  height: 52px;
  padding: 0 10px;
  border: 1.5px solid rgba(139, 92, 246, 0.35);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.9);
  transition: all 0.22s var(--ease);
  color: var(--purple);
  white-space: nowrap;
}

.phoneme-box:hover {
  background: var(--purple);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(139, 92, 246, 0.28);
}

.phoneme-box.show-letter {
  background: #fef3c7;
  color: #92400e;
  border-color: rgba(245, 158, 11, 0.4);
}

.score-bar {
  height: 10px;
  background: rgba(15, 23, 42, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin: 8px 0;
}

.score-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-dark), var(--primary));
  border-radius: 999px;
  transition: width 0.5s ease;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 16px 0;
}

.familiar-check {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  margin: 16px 0;
  cursor: pointer;
}

.familiar-check input {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--primary);
}

.stars {
  display: flex;
  justify-content: center;
  gap: 6px;
  font-size: 1.75rem;
  margin: 12px 0;
}

.stars i { color: #e2e8f0; }
.stars i.on { color: #fbbf24; animation: starPop 0.3s ease; }

/* 例句 */
.sentence-card {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  border-radius: 14px;
  padding: 16px 18px;
  margin-bottom: 12px;
  border: var(--glass-border);
  border-left: 3px solid var(--primary);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.sentence-en {
  font-size: 1.15rem;
  margin-bottom: 8px;
  line-height: 1.8;
}

.word-clickable {
  cursor: pointer;
  padding: 1px 4px;
  border-radius: 6px;
  border-bottom: 2px dashed var(--blue);
  transition: background 0.15s, color 0.15s;
}

.word-clickable:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
}

.word-clickable.active {
  background: var(--blue);
  color: #fff;
  border-bottom-color: transparent;
}

/* 查词弹窗 */
.lookup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  animation: fadeSlideUp 0.25s ease;
}

.lookup-modal {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  max-width: 480px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 28px 24px 24px;
  position: relative;
}

.lookup-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: #b2bec3;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: background 0.15s;
}

.lookup-close:hover { background: #f1f2f6; color: #2d3436; }

.lookup-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.lookup-word {
  font-size: 2rem;
  font-weight: bold;
  color: var(--orange-dark);
}

.lookup-ipa {
  font-size: 1.1rem;
  color: var(--purple);
  font-family: 'Segoe UI', sans-serif;
}

.lookup-pos {
  display: inline-block;
  background: var(--cream);
  color: var(--blue-dark);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: bold;
}

.lookup-section {
  margin-bottom: 14px;
}

.lookup-section h4 {
  font-size: 0.85rem;
  color: #b2bec3;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.lookup-section p {
  font-size: 1.05rem;
  line-height: 1.6;
}

.lookup-context {
  background: var(--cream);
  padding: 12px 14px;
  border-radius: 12px;
  border-left: 4px solid var(--orange);
  font-style: italic;
  color: #636e72;
  margin-bottom: 14px;
  font-size: 0.95rem;
}

.lookup-loading {
  text-align: center;
  padding: 40px 20px;
  color: #636e72;
}

.lookup-loading i {
  font-size: 2rem;
  color: var(--orange);
  margin-bottom: 12px;
  display: block;
}

.lookup-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
  flex-wrap: wrap;
}

.sentence-zh {
  color: #636e72;
  font-size: 1rem;
  display: none;
}

.sentence-zh.show { display: block; animation: fadeSlideUp 0.3s; }

/* 计时器 */
.timer-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  padding: 14px;
  background: var(--yellow);
  border-radius: 14px;
  font-weight: bold;
  margin-top: 16px;
}

.timer-bar i { color: var(--orange-dark); }

/* 统计 */
.stats-panel {
  text-align: center;
  padding: 20px;
  background: linear-gradient(135deg, #dfffed, #fff8e7);
  border-radius: var(--radius);
  animation: pop 0.5s ease;
}

.stats-panel h3 { color: var(--green-dark); margin-bottom: 12px; }

.progress-ring {
  font-size: 2.5rem;
  color: var(--orange-dark);
  font-weight: bold;
}

/* 游戏通用 */
.game-area { min-height: 300px; }

.letter-pool, .word-pool {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 16px 0;
}

.letter-block, .word-block {
  min-width: 48px;
  min-height: 48px;
  padding: 10px 14px;
  background: var(--yellow);
  border: 3px solid var(--orange);
  border-radius: 12px;
  font-size: 1.3rem;
  font-weight: bold;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: all 0.15s;
  user-select: none;
}

.letter-block:hover, .word-block:hover { transform: translateY(-2px); }
.letter-block.used, .word-block.used {
  opacity: 0.3;
  pointer-events: none;
  transform: scale(0.9);
}

.letter-block.wrong { animation: shake 0.4s; background: #fab1a0; }

.target-slots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  min-height: 60px;
  padding: 12px;
  background: #fff;
  border: 3px dashed var(--blue);
  border-radius: 14px;
  margin-bottom: 16px;
}

.slot {
  width: 48px;
  height: 48px;
  border: 2px solid #b2bec3;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
  background: #f8f9fa;
}

.slot.filled {
  background: var(--green);
  border-color: var(--green-dark);
  color: #fff;
}

.chinese-hidden {
  padding: 12px 20px;
  background: #dfe6e9;
  border-radius: 12px;
  cursor: pointer;
  text-align: center;
  margin: 12px 0;
  font-style: italic;
  color: #636e72;
}

.chinese-hidden.revealed {
  background: var(--cream);
  font-style: normal;
  color: #2d3436;
  font-weight: bold;
}

/* 迷宫网格 */
.maze-grid {
  display: grid;
  gap: 4px;
  max-width: 340px;
  margin: 0 auto;
}

.maze-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 2px solid var(--blue);
  border-radius: 8px;
  font-weight: bold;
  font-size: 1.05rem;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s;
}

.maze-cell:hover { background: var(--yellow); }
.maze-cell.selected { background: var(--orange); color: #fff; }
.maze-cell.found { background: #b8e994; color: #2d3436; }
.maze-cell.hint {
  background: #a29bfe;
  color: #fff;
  animation: mazeHintPulse 0.7s ease-in-out 4;
  z-index: 1;
}
@keyframes mazeHintPulse {
  0%, 100% { background: #a29bfe; transform: scale(1); }
  50% { background: #6c5ce7; transform: scale(1.06); }
}

.target-word-item.hint-target {
  border-color: #6c5ce7;
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.35);
}

.maze-hint {
  text-align: center;
  color: #636e72;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.maze-path-preview {
  text-align: center;
  font-weight: bold;
  color: #e17055;
  min-height: 1.5em;
  margin-bottom: 8px;
  letter-spacing: 0.15em;
}

.target-words {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
}

.target-word-item {
  text-align: center;
  padding: 10px;
  background: #fff;
  border-radius: 12px;
  border: 2px solid var(--blue);
  min-width: 80px;
}

.target-word-item img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 8px;
}

.target-word-item.done { border-color: var(--green-dark); background: #dfffed; }

/* 记忆配对 */
.memory-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  max-width: 720px;
  margin: 0 auto;
}

.memory-card {
  aspect-ratio: 1;
  perspective: 600px;
  cursor: pointer;
}

.memory-card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s;
}

.memory-card.flipped .memory-card-inner { transform: rotateY(180deg); }
.memory-card.matched { opacity: 0; pointer-events: none; transition: opacity 0.4s; }

.memory-front, .memory-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  box-shadow: var(--shadow);
}

.memory-front {
  background: linear-gradient(135deg, var(--orange), var(--pink));
  color: #fff;
  font-size: 2rem;
}

.memory-back {
  background: #fff;
  border: 3px solid var(--blue);
  transform: rotateY(180deg);
  flex-direction: column;
  overflow: hidden;
}

.memory-back--word {
  padding: 10px;
  font-size: 1.66rem;
  justify-content: center;
}

.memory-back--word span {
  text-align: center;
  line-height: 1.25;
  word-break: break-word;
}

.memory-back--pic {
  padding: 0;
}

.memory-back--pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 11px;
}

/* 选择题 */
.quiz-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 20px 0;
}

.quiz-option {
  padding: 18px;
  background: #fff;
  border: 3px solid var(--blue);
  border-radius: 14px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quiz-option:hover { background: var(--yellow); transform: translateY(-2px); }
.quiz-option.correct { background: var(--green); border-color: var(--green-dark); color: #fff; }
.quiz-option.wrong { background: #fab1a0; border-color: #e17055; animation: shake 0.4s; }

.quiz-question {
  text-align: center;
  font-size: 1.5rem;
  margin: 20px 0;
}

.quiz-question img {
  max-width: 200px;
  border-radius: 14px;
  margin-bottom: 12px;
}

.feedback {
  text-align: center;
  font-size: 1.3rem;
  padding: 12px;
  border-radius: 12px;
  margin: 12px 0;
  animation: pop 0.3s;
}

.feedback.good { background: #dfffed; color: var(--green-dark); }
.feedback.bad { background: #ffe0e0; color: #d63031; }

/* 测试报告 */
.report-card {
  background: #fff;
  padding: 24px;
  border-radius: var(--radius);
  border: 3px solid var(--green-dark);
}

.report-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed #dfe6e9;
}

.report-total {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--orange-dark);
  text-align: center;
  margin-top: 16px;
}

/* 录音状态 */
.recording {
  animation: pulse 1s infinite;
  background: #e17055 !important;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(225, 112, 85, 0.5); }
  50% { box-shadow: 0 0 0 12px rgba(225, 112, 85, 0); }
}

.hidden { display: none !important; }

/* 游戏六：听音捞鱼 */
.fish-game-area {
  position: relative;
  overflow: hidden;
}

.fish-pond {
  position: relative;
  background: linear-gradient(165deg, #4dd0e1 0%, #29b6f6 45%, #0288d1 100%);
  border-radius: 24px;
  padding: 20px 16px 18px;
  min-height: 420px;
  box-shadow: inset 0 -8px 24px rgba(0, 60, 120, 0.25);
}

.fish-pond-bubbles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.fish-pond-bubbles span {
  position: absolute;
  bottom: -20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  animation: pondBubble 4s ease-in infinite;
}

.fish-pond-bubbles span:nth-child(1) { left: 8%; animation-delay: 0s; width: 8px; height: 8px; }
.fish-pond-bubbles span:nth-child(2) { left: 22%; animation-delay: 1.2s; }
.fish-pond-bubbles span:nth-child(3) { left: 55%; animation-delay: 0.6s; width: 12px; height: 12px; }
.fish-pond-bubbles span:nth-child(4) { left: 78%; animation-delay: 2s; width: 7px; height: 7px; }
.fish-pond-bubbles span:nth-child(5) { left: 90%; animation-delay: 1.8s; }

@keyframes pondBubble {
  0% { transform: translateY(0) scale(1); opacity: 0.6; }
  100% { transform: translateY(-420px) scale(1.3); opacity: 0; }
}

.fish-pond-waves {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 48' preserveAspectRatio='none'%3E%3Cpath fill='rgba(255,255,255,0.22)' d='M0 24 Q150 0 300 24 T600 24 T900 24 T1200 24 V0 H0Z'/%3E%3C/svg%3E") repeat-x;
  background-size: 600px 48px;
  animation: waveDrift 6s linear infinite;
  pointer-events: none;
}

@keyframes waveDrift {
  from { background-position-x: 0; }
  to { background-position-x: 600px; }
}

.fish-listen-zone {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 16px 12px;
  margin-bottom: 14px;
  background: rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  backdrop-filter: blur(4px);
}

.fish-listen-zone p {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.fish-listen-btn {
  width: 76px;
  height: 76px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(145deg, #fff 0%, #e3f2fd 100%);
  color: var(--blue-dark);
  font-size: 1.8rem;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18), 0 0 0 4px rgba(255, 255, 255, 0.35);
  transition: transform 0.2s;
  animation: fishListenPulse 2s ease-in-out infinite;
}

.fish-listen-btn:hover {
  transform: scale(1.08);
  animation: none;
}

@keyframes fishListenPulse {
  0%, 100% { box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18), 0 0 0 4px rgba(255, 255, 255, 0.35); }
  50% { box-shadow: 0 6px 24px rgba(0, 0, 0, 0.22), 0 0 0 10px rgba(255, 255, 255, 0.15); }
}

.fish-round-timer {
  position: relative;
  z-index: 2;
  height: 10px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  margin-bottom: 14px;
  overflow: hidden;
}

.fish-round-timer-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #fff176, #ffb74d);
  border-radius: 999px;
  transition: width 0.95s linear;
}

.fish-round-timer-fill.urgent {
  background: linear-gradient(90deg, #ff8a65, #e53935);
}

.fish-streak {
  position: relative;
  z-index: 2;
  text-align: center;
  min-height: 28px;
  margin-bottom: 8px;
  font-weight: 700;
  color: #fff59d;
  font-size: 1.05rem;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.fish-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.fish-card {
  background: rgba(255, 255, 255, 0.94);
  border: 3px solid rgba(255, 255, 255, 0.8);
  border-radius: 20px;
  padding: 14px 10px 12px;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 6px 0 rgba(1, 87, 155, 0.35);
  transition: transform 0.15s, box-shadow 0.15s;
  user-select: none;
  touch-action: manipulation;
}

.fish-card:hover:not(.disabled) {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 10px 0 rgba(1, 87, 155, 0.3);
}

.fish-card:active:not(.disabled) {
  transform: translateY(2px);
  box-shadow: 0 2px 0 rgba(1, 87, 155, 0.35);
}

.fish-card.disabled {
  pointer-events: none;
  opacity: 0.75;
}

.fish-card-icon {
  font-size: 2.6rem;
  line-height: 1;
  display: block;
  margin-bottom: 6px;
  animation: fishWiggle 2.5s ease-in-out infinite;
}

.fish-card:nth-child(2) .fish-card-icon { animation-delay: 0.4s; }
.fish-card:nth-child(3) .fish-card-icon { animation-delay: 0.8s; }
.fish-card:nth-child(4) .fish-card-icon { animation-delay: 1.2s; }

@keyframes fishWiggle {
  0%, 100% { transform: rotate(-4deg) translateY(0); }
  50% { transform: rotate(4deg) translateY(-4px); }
}

.fish-card-word {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1565c0;
  word-break: break-word;
}

.fish-card.correct {
  background: #e8f5e9;
  border-color: #66bb6a;
  animation: fishCaught 0.65s ease forwards;
}

.fish-card.wrong {
  background: #ffebee;
  border-color: #ef5350;
  animation: fishWrong 0.5s ease;
}

@keyframes fishCaught {
  0% { transform: scale(1); }
  40% { transform: scale(1.12) translateY(-12px); }
  100% { transform: scale(1.05) translateY(-8px); opacity: 0.9; }
}

@keyframes fishWrong {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

.fish-splash {
  position: absolute;
  pointer-events: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.8);
  animation: splashPop 0.7s ease-out forwards;
  z-index: 10;
}

@keyframes splashPop {
  0% { transform: scale(0); opacity: 1; }
  100% { transform: scale(3); opacity: 0; }
}