/* ==========================================================================
   螺丝钉英语磨耳朵 — 视觉与布局
   基调：科普工作台 / 米白底 / 实验绿主色 / 浅蓝辅助 / 橙色警示
   目标：iPad Safari，横屏优先，竖屏可用
   ========================================================================== */

:root {
  /* 底色与层次 */
  --bg:            #F7F4EC;
  --bg-tint:       #F1EDE2;
  --surface:       #FFFFFF;
  --surface-2:     #FCFBF7;
  --surface-sunk:  #F4F1E8;

  /* 描边 */
  --line:          #E7E2D6;
  --line-strong:   #D6CFBE;

  /* 文字 */
  --ink:           #23281F;
  --ink-2:         #5A6157;
  --ink-3:         #8C9287;

  /* 实验绿（主强调） */
  --green:         #2F7D5B;
  --green-strong:  #256349;
  --green-soft:    #E6F1EA;
  --green-line:    #BEDCCB;

  /* 浅蓝（辅助信息） */
  --blue:          #2B6C93;
  --blue-soft:     #E8F1F8;
  --blue-line:     #C6DCEC;

  /* 橙（需要注意的状态） */
  --amber:         #B4692A;
  --amber-soft:    #FBF0E1;
  --amber-line:    #EFD5B4;

  /* 危险 */
  --danger:        #A8422F;
  --danger-soft:   #FBE9E4;
  --danger-line:   #EFC7BB;

  --radius-lg: 20px;
  --radius:    16px;
  --radius-sm: 11px;

  --shadow-1: 0 1px 2px rgba(35,40,31,.05), 0 2px 8px rgba(35,40,31,.045);
  --shadow-2: 0 2px 6px rgba(35,40,31,.06), 0 10px 28px rgba(35,40,31,.07);
  --shadow-inset: inset 0 0 0 1px var(--line);

  --tap: 44px;             /* 最小触控目标 */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", system-ui, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}

body {
  /* 米白底上叠一层极淡的工程纸网格，强化“工作台”质感但不干扰阅读 */
  background-image:
    radial-gradient(circle at 1px 1px, rgba(35,40,31,.045) 1px, transparent 0);
  background-size: 22px 22px;
}

button { font-family: inherit; }

.noscript {
  margin: 40px auto; max-width: 460px; padding: 20px 24px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); text-align: center; color: var(--ink-2);
}

.app {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* 工作台需要「整页不滚动、内部各自滚动」：给 html 加锁，让高度成为确定值 */
html.wb-lock,
html.wb-lock body { height: 100%; overflow: hidden; }
html.wb-lock .app { height: 100vh; height: 100dvh; min-height: 0; }

/* ==========================================================================
   顶部栏
   ========================================================================== */

.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: calc(10px + env(safe-area-inset-top)) calc(14px + env(safe-area-inset-right)) 10px calc(14px + env(safe-area-inset-left));
  background: rgba(247,244,236,.88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  min-width: 0; text-decoration: none; color: inherit;
}
.brand-mark {
  width: 34px; height: 34px; flex: 0 0 auto; border-radius: 10px;
  background: var(--green-soft); border: 1px solid var(--green-line);
  display: grid; place-items: center;
}
.brand-mark svg { width: 21px; height: 21px; }
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-title { font-size: 15.5px; font-weight: 650; letter-spacing: .01em; line-height: 1.15; }
.brand-sub { font-size: 11px; color: var(--ink-3); line-height: 1.3; letter-spacing: .04em; }

.topbar-context {
  flex: 1 1 auto; min-width: 0;
  display: flex; align-items: baseline; gap: 9px;
  padding-left: 12px; border-left: 1px solid var(--line);
}
.topbar-ep-no {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  color: var(--green); background: var(--green-soft);
  border: 1px solid var(--green-line); border-radius: 6px;
  padding: 2px 7px; flex: 0 0 auto; letter-spacing: .04em;
}
.topbar-series {
  font-size: 11px; font-weight: 700; color: var(--amber);
  background: var(--amber-soft); border: 1px solid var(--amber-line);
  border-radius: 6px; padding: 2px 7px; flex: 0 0 auto; letter-spacing: .03em;
}
.topbar-ep-title {
  font-size: 15px; font-weight: 600; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}

.topbar-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }

/* ==========================================================================
   通用控件
   ========================================================================== */

.btn {
  appearance: none; border: 1px solid var(--line-strong);
  background: var(--surface); color: var(--ink);
  border-radius: var(--radius-sm);
  min-height: var(--tap); min-width: var(--tap);
  padding: 0 14px;
  font-size: 14.5px; font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  cursor: pointer;
  transition: background .14s ease, border-color .14s ease, transform .06s ease, box-shadow .14s ease;
  user-select: none; -webkit-user-select: none;
}
.btn:hover { background: var(--surface-2); border-color: var(--line); }
.btn:active { transform: scale(.975); }
.btn:focus-visible { outline: 3px solid var(--green-line); outline-offset: 2px; }
.btn[disabled] { opacity: .42; pointer-events: none; }

.btn-primary {
  background: var(--green); border-color: var(--green-strong); color: #fff;
}
.btn-primary:hover { background: var(--green-strong); border-color: var(--green-strong); }

.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-2); }
.btn-ghost:hover { background: rgba(35,40,31,.05); }

.btn-icon { padding: 0; width: var(--tap); }

.btn svg { width: 19px; height: 19px; flex: 0 0 auto; }

.seg {
  display: inline-flex; background: var(--surface-sunk);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 3px; gap: 3px;
}
.seg button {
  appearance: none; border: 0; background: transparent; color: var(--ink-2);
  min-height: 34px; padding: 0 13px; border-radius: 8px;
  font-size: 13.5px; font-weight: 600; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  transition: background .14s ease, color .14s ease, box-shadow .14s ease;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] {
  background: var(--surface); color: var(--green-strong);
  box-shadow: var(--shadow-1);
  border: 1px solid var(--green-line);
  /* 保持尺寸稳定 */
  margin: -1px;
}
.seg button[aria-pressed="true"] svg { color: var(--green); }

.field-label {
  font-size: 11px; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-3);
}

/* ==========================================================================
   页面通用
   ========================================================================== */

.page {
  flex: 1 1 auto; min-height: 0;
  display: flex; flex-direction: column;
  padding: 18px calc(18px + env(safe-area-inset-right)) calc(18px + env(safe-area-inset-bottom)) calc(18px + env(safe-area-inset-left));
  gap: 16px;
}

.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.page-title { font-size: 24px; font-weight: 700; letter-spacing: -.012em; margin: 0; }
.page-desc { margin: 5px 0 0; color: var(--ink-2); font-size: 14px; max-width: 62ch; line-height: 1.55; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

/* ==========================================================================
   页面 1 · 动画选集
   ========================================================================== */

.continue-card {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 18px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--green-soft) 190%);
  border: 1px solid var(--green-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}
.continue-thumb {
  width: 92px; height: 56px; flex: 0 0 auto; border-radius: 10px;
  overflow: hidden; background: var(--surface-sunk); border: 1px solid var(--line);
  display: grid; place-items: center;
}
.continue-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.continue-meta { flex: 1 1 auto; min-width: 0; }
.continue-kicker { font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--green); }
.continue-title { font-size: 17px; font-weight: 650; margin: 3px 0 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.continue-pos { font-size: 13px; color: var(--ink-2); margin-top: 3px; font-variant-numeric: tabular-nums; }

.ep-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(228px, 1fr));
  gap: 16px;
  padding-bottom: 8px;
}

/* 合集分节：一部动画一节（只有一部动画时不渲染分节标题，界面保持干净） */
.series-block { display: flex; flex-direction: column; gap: 12px; }
.series-block + .series-block {
  margin-top: 10px; padding-top: 22px; border-top: 1px solid var(--line);
}
.series-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.series-title { font-size: 19px; font-weight: 700; margin: 0; letter-spacing: -.01em; }
.series-sub {
  font-size: 12.5px; color: var(--ink-3);
  font-family: var(--font-mono); letter-spacing: .02em;
}
.series-count {
  font-size: 11.5px; font-weight: 700; color: var(--green);
  background: var(--green-soft); border: 1px solid var(--green-line);
  border-radius: 999px; padding: 2px 9px; margin-left: auto;
}
.series-desc { margin: -4px 0 0; font-size: 13px; color: var(--ink-2); line-height: 1.55; max-width: 62ch; }

.ep-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  cursor: pointer;
  text-align: left; padding: 0;
  transition: transform .12s ease, box-shadow .16s ease, border-color .16s ease;
}
.ep-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--line-strong); }
.ep-card:active { transform: translateY(0) scale(.99); }
.ep-card:focus-visible { outline: 3px solid var(--green-line); outline-offset: 2px; }
.ep-card[aria-disabled="true"] { cursor: not-allowed; opacity: .68; }
.ep-card[aria-disabled="true"]:hover { transform: none; box-shadow: var(--shadow-1); }

.ep-thumb {
  position: relative; aspect-ratio: 16 / 9; width: 100%;
  background: linear-gradient(135deg, var(--green-soft), var(--blue-soft));
  display: grid; place-items: center; overflow: hidden;
}
.ep-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ep-thumb-no {
  position: absolute; top: 9px; left: 9px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  background: rgba(35,40,31,.72); color: #fff;
  border-radius: 6px; padding: 3px 7px; letter-spacing: .04em;
  backdrop-filter: blur(4px);
}
.ep-thumb-dur {
  position: absolute; bottom: 9px; right: 9px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  background: rgba(35,40,31,.72); color: #fff;
  border-radius: 6px; padding: 3px 7px; font-variant-numeric: tabular-nums;
  backdrop-filter: blur(4px);
}
.ep-thumb-play {
  position: absolute; inset: 0; display: grid; place-items: center;
  opacity: 0; transition: opacity .16s ease; background: rgba(47,125,91,.16);
}
.ep-card:hover .ep-thumb-play { opacity: 1; }
.ep-thumb-play span {
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255,255,255,.94); border: 1px solid var(--green-line);
  display: grid; place-items: center;
  box-shadow: var(--shadow-2);
}
.ep-thumb-play svg { width: 22px; height: 22px; color: var(--green); margin-left: 2px; }

.ep-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 9px; }
.ep-title {
  font-size: 15.5px; font-weight: 640; line-height: 1.35; margin: 0;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.ep-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; }

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 650; letter-spacing: .02em;
  border-radius: 999px; padding: 3.5px 9px; white-space: nowrap;
  border: 1px solid transparent;
}
.badge svg { width: 12px; height: 12px; }
.badge-green  { background: var(--green-soft);  color: var(--green-strong); border-color: var(--green-line); }
.badge-blue   { background: var(--blue-soft);   color: var(--blue);         border-color: var(--blue-line); }
.badge-amber  { background: var(--amber-soft);  color: var(--amber);        border-color: var(--amber-line); }
.badge-danger { background: var(--danger-soft); color: var(--danger);       border-color: var(--danger-line); }
.badge-plain  { background: var(--surface-sunk); color: var(--ink-2);       border-color: var(--line); }

.ep-count { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* 空状态 */
.empty {
  margin: 28px auto; max-width: 560px; text-align: center;
  padding: 40px 28px; background: var(--surface);
  border: 1px dashed var(--line-strong); border-radius: var(--radius-lg);
}
.empty-mark {
  width: 62px; height: 62px; margin: 0 auto 16px; border-radius: 18px;
  background: var(--green-soft); border: 1px solid var(--green-line);
  display: grid; place-items: center;
}
.empty-mark svg { width: 30px; height: 30px; color: var(--green); }
.empty h2 { margin: 0 0 8px; font-size: 19px; }
.empty p { margin: 0 0 20px; color: var(--ink-2); font-size: 14px; line-height: 1.6; }

/* ==========================================================================
   页面 2 · 学习工作台
   ========================================================================== */

.wb {
  flex: 1 1 auto; min-height: 0;
  display: flex; flex-direction: column;
  padding: 14px calc(14px + env(safe-area-inset-right)) calc(14px + env(safe-area-inset-bottom)) calc(14px + env(safe-area-inset-left));
  gap: 12px;
}

.wb-body {
  flex: 1 1 auto; min-height: 0;
  display: grid;
  /* 左侧只放播放器 + 控制器，不再和闪卡分高度，所以右边收窄一点，
     把宽度让给画面（横屏 iPad 上画面能大 ~16%）。 */
  grid-template-columns: minmax(0, 1fr) clamp(264px, 25%, 360px);
  gap: 12px;
}

/* --- 右侧面板：字幕表 / 闪卡 两个页签 --- */
.side-panel {
  min-width: 0; min-height: 0;
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}
.side-tabs {
  flex: 0 0 auto;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4px; padding: 7px 7px 0;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}
.side-tab {
  appearance: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 8px 10px;
  font: inherit; font-size: 13.5px; font-weight: 650;
  color: var(--ink-3);
  background: none; border: 0;
  border-bottom: 2.5px solid transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  -webkit-tap-highlight-color: transparent;
}
.side-tab svg { width: 15px; height: 15px; }
.side-tab[aria-selected="true"] {
  color: var(--green-strong);
  border-bottom-color: var(--green);
  background: var(--surface);
}
.side-pane { flex: 1 1 auto; min-height: 0; }
.side-cards { overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 12px; }
.side-empty { margin: 0; color: var(--ink-3); font-size: 13px; }
/* 页签切换：只显示当前那一页 */
.side-panel[data-tab="subs"] .side-pane[data-pane="cards"],
.side-panel[data-tab="cards"] .side-pane[data-pane="subs"] { display: none; }

.wb-stage {
  min-width: 0; min-height: 0;
  display: flex; flex-direction: column; gap: 10px;
}

.stage-scroll {
  min-height: 0; overflow-y: auto; overscroll-behavior: contain;
  display: flex; flex-direction: column; gap: 10px;
  padding-right: 2px;
}

/* --- 播放器 --- */
.player {
  position: relative;
  background: #12160F;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}
.player video {
  display: block; width: 100%; max-height: 60vh; background: #12160F;
  aspect-ratio: 16 / 9; object-fit: contain;
}
.player-veil {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center;
  background: rgba(18,22,15,.86); color: #F0EEE6; padding: 26px; gap: 10px;
  backdrop-filter: blur(3px);
}
.player-veil[hidden] { display: none; }
.player-veil .veil-inner { max-width: 460px; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.player-veil svg { width: 34px; height: 34px; color: var(--amber-line); }
.player-veil h3 { margin: 0; font-size: 16px; color: #fff; font-weight: 650; }
.player-veil p { margin: 0; font-size: 13.5px; line-height: 1.6; color: #C9C6BC; }
.player-veil .veil-hint {
  font-family: var(--font-mono); font-size: 11.5px; color: #9C998F;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14);
  padding: 7px 11px; border-radius: 8px; text-align: left; word-break: break-all;
}

/* --- 进度与播放控制 --- */
.transport { display: flex; align-items: center; gap: 12px; padding: 0 2px; }
.time-now, .time-total {
  font-family: var(--font-mono); font-size: 12.5px; font-variant-numeric: tabular-nums;
  color: var(--ink-2); flex: 0 0 auto; min-width: 46px;
}
.time-total { color: var(--ink-3); text-align: right; }

.scrub {
  position: relative; flex: 1 1 auto; height: 30px; display: flex; align-items: center;
  cursor: pointer; touch-action: none;
}
.scrub-track {
  position: absolute; left: 0; right: 0; height: 7px; border-radius: 999px;
  background: var(--surface-sunk); border: 1px solid var(--line); overflow: hidden;
}
.scrub-fill {
  position: absolute; left: 0; top: 0; bottom: 0; width: 0%;
  background: var(--green); border-radius: 999px;
}
.scrub-buffer { position: absolute; left: 0; top: 0; bottom: 0; width: 0%; background: var(--green-line); opacity: .5; }
.scrub-knob {
  position: absolute; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 2px solid var(--green);
  transform: translateX(-50%); pointer-events: none;
  box-shadow: 0 1px 4px rgba(35,40,31,.28);
  transition: transform .1s ease;
}
.scrub:active .scrub-knob { transform: translateX(-50%) scale(1.12); }
.scrub-marks { position: absolute; left: 0; right: 0; height: 7px; pointer-events: none; }
.scrub-mark { position: absolute; top: 0; width: 1px; height: 7px; background: rgba(47,125,91,.32); }

.controls-row {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 11px 13px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}
.controls-spacer { flex: 1 1 auto; }
.ctrl-group { display: flex; align-items: center; gap: 8px; }
.ctrl-group > .field-label { margin-right: -1px; }

/* --- 播放时自动收起进度条和控制条 ---
   播放中 2.6s 无操作 → 整块收起（高度过渡到 0，不占位），
   点一下画面 / 暂停立刻唤回。收起时同时把字幕表收窄一点，
   播放器变宽，画面真的能变大（不只是省出下面那条）。 */
.transport, .controls-row {
  transition: max-height .3s ease, opacity .22s ease, padding .3s ease;
}
.transport { max-height: 90px; }
/* 控制条在 320px 窄屏会折到 7 行（约 402px）——上限给足，别把「速度」那行顶出卡片。
   这个数值只在「自动隐藏」收起动画里当过渡起点用，不影响正常布局。 */
.controls-row { max-height: 520px; }
.wb.chrome-hidden .transport,
.wb.chrome-hidden .controls-row {
  max-height: 0 !important;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
  padding-top: 0; padding-bottom: 0;
  border-top-width: 0; border-bottom-width: 0;
  box-shadow: none;
}
.wb.chrome-hidden .player video { max-height: 68vh; }
.wb-body { transition: grid-template-columns .3s ease; }
.wb.chrome-hidden .wb-body {
  grid-template-columns: minmax(0, 1fr) clamp(240px, 20%, 300px);
}

.btn-play {
  width: 56px; height: 56px; border-radius: 50%; padding: 0;
  background: var(--green); border: 1px solid var(--green-strong); color: #fff;
  flex: 0 0 auto;
}
.btn-play:hover { background: var(--green-strong); }
.btn-play svg { width: 24px; height: 24px; }

/* --- 播放器内字幕层（随播放显示当前句） ---
   旧版的「正在播放」字幕卡移除了，字幕直接叠在画面下方，
   用 半透明底 + 轻模糊 + 文字阴影 保证在亮/暗画面上都读得清。 */
.sub-layer {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; justify-content: center; align-items: flex-end;
  padding: 0 4% calc(3.5% + 6px);
  pointer-events: none;             /* 不挡住播放器自身的点击 */
  z-index: 1;
}
.sub-layer[data-mode="off"] { display: none; }
.sub-inner {
  max-width: 94%;
  background: rgba(15, 19, 12, .60);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 13px;
  padding: 7px 14px 9px;
  text-align: center;
  backdrop-filter: blur(5px) saturate(150%);
  -webkit-backdrop-filter: blur(5px) saturate(150%);
  box-shadow: 0 3px 16px rgba(0, 0, 0, .28);
  transition: opacity .18s ease;
}
.sub-layer[data-active="0"] .sub-inner { opacity: 0; }
.sub-en, .sub-zh {
  margin: 0; color: #fff; line-height: 1.34; overflow-wrap: anywhere;
  text-shadow: 0 1px 3px rgba(0, 0, 0, .55);
}
.sub-en {
  font-weight: 620; letter-spacing: -.004em;
  font-size: 17px;                                  /* cqw 不支持时的兜底 */
  font-size: clamp(14px, 2.55cqw, 26px);
}
.sub-zh {
  margin-top: 3px; color: #E9F3EC;
  font-size: 14px;
  font-size: clamp(12px, 1.85cqw, 19px);
}
.sub-zh[data-empty="1"] { display: none; }          /* 没翻译就不占位 */
.sub-layer[data-mode="zh"] .sub-en { display: none; }
.sub-layer[data-mode="en"] .sub-zh { display: none; }
/* 盲听：当前句还没点开 → 英文糊掉，耳朵先上 */
.sub-en[data-blind="1"] {
  filter: blur(7px); opacity: .55; user-select: none;
  transition: filter .18s ease, opacity .18s ease;
}

/* 播放器需要成为容器，让字幕字号跟着播放器宽度走 */
.player { container-type: inline-size; }

/* --- 跟读留白：挂在播放器顶部中央 --- */
.player > .gap-chip {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  z-index: 2;
  background: rgba(230, 241, 234, .94);
  box-shadow: 0 2px 12px rgba(0, 0, 0, .3);
}

/* --- 闪卡：这一集的词，点卡翻面，帮孩子记住 ---
   现在住在右侧面板里，宽度只有 240~360px，所以用两列自适应网格，
   不再是一整条横向滑动（竖屏面板会变宽，网格会自动排更多列）。 */
.fc-head {
  display: flex; align-items: center; gap: 10px; margin-bottom: 9px; flex-wrap: wrap;
}
.fc-head .btn { margin-left: auto; }
.fc-count {
  font-size: 12px; font-weight: 650; color: var(--green);
  font-variant-numeric: tabular-nums;
}
.fc-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(116px, 1fr));
  gap: 10px;
  align-content: start;
}
.fc-card {
  position: relative; height: 170px;
  background: none; border: none; padding: 0; cursor: pointer;
  perspective: 900px;
  -webkit-tap-highlight-color: transparent;
}
.fc-inner {
  position: absolute; inset: 0;
  transition: transform .32s ease;
  transform-style: preserve-3d;
}
.fc-card[data-flip="1"] .fc-inner { transform: rotateY(180deg); }
.fc-face {
  position: absolute; inset: 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: var(--radius-sm);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 5px; padding: 10px 9px; text-align: center;
  overflow: hidden;          /* 例句太长时裁掉，别把圆角盒子撑破 */
}
.fc-front {
  background: var(--surface-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}
.fc-back {
  background: var(--green-soft);
  border: 1px solid var(--green-line);
  transform: rotateY(180deg);
  justify-content: flex-start; padding-top: 14px; gap: 6px;
}
.fc-emoji { font-size: 34px; line-height: 1; }
.fc-word {
  font-size: 17px; font-weight: 680; letter-spacing: -.01em; color: var(--ink);
  overflow-wrap: anywhere;
}
.fc-hint {
  font-size: 10.5px; color: var(--ink-3); font-weight: 550;
}
.fc-known {
  position: absolute; top: 7px; right: 7px;
  width: 19px; height: 19px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--green); color: #fff;
}
.fc-known svg { width: 12px; height: 12px; }
.fc-known[hidden] { display: none; }
.fc-card[data-known="1"] .fc-front { background: var(--green-soft); border-color: var(--green-line); }
.fc-zh {
  font-size: 16px; font-weight: 680; color: var(--green-strong);
}
.fc-line {
  margin: 0; font-size: 11px; line-height: 1.4; color: var(--ink-2);
  display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden;
  flex: 0 0 auto;   /* overflow:hidden 会让 flex 自动最小尺寸变成 0，必须显式不许压扁 */
}
.fc-mark {
  background: rgba(47, 125, 91, .18); color: var(--green-strong);
  border-radius: 4px; padding: 0 2px; font-weight: 650;
}
/* 两个按钮排成等宽两列，永远单行；卡宽只有 ~100px，用网格而不是 flex-wrap，
   否则按钮一多就会换行把卡片背面撑爆 */
.fc-actions {
  display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr);
  gap: 5px; width: 100%; margin-top: auto;
}
.fc-btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 640; color: var(--green-strong);
  background: #fff; border: 1px solid var(--green-line);
  border-radius: 999px; padding: 4px 6px; cursor: pointer;
  min-height: 26px; min-width: 0; white-space: nowrap;
}
.fc-btn svg { width: 12px; height: 12px; }
.fc-btn:active { background: var(--green-soft); }

/* --- 短语卡：和单词卡同排并列，但用琥珀色区分开，
   让「单词」和「整句/短语」一眼就分得清 --- */
.fc-card[data-kind="phrase"] .fc-front {
  background: var(--amber-soft); border-color: var(--amber-line);
}
.fc-card[data-kind="phrase"] .fc-back {
  background: #FDF6EC; border-color: var(--amber-line);
}
.fc-card[data-kind="phrase"] .fc-emoji { font-size: 22px; }
.fc-card[data-kind="phrase"] .fc-word {
  font-size: 12.5px; line-height: 1.32; font-weight: 620;
  display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical;
  overflow: hidden;
}
.fc-card[data-kind="phrase"] .fc-zh { color: var(--amber); }
.fc-card[data-kind="phrase"] .fc-line {
  font-size: 11px; -webkit-line-clamp: 2;
}
.fc-card[data-kind="phrase"] .fc-actions { padding-bottom: 0; }
.fc-card[data-kind="phrase"] .fc-back { gap: 5px; }
.fc-card[data-kind="phrase"] .fc-btn { color: var(--amber); border-color: var(--amber-line); }
.fc-card[data-kind="phrase"] .fc-mark { background: rgba(180, 105, 42, .16); color: var(--amber); }
.fc-card[data-kind="phrase"][data-known="1"] .fc-front {
  background: var(--green-soft); border-color: var(--green-line);
}
.fc-kind {
  position: absolute; top: 7px; left: 7px;
  font-size: 9.5px; font-weight: 700; letter-spacing: .04em;
  color: var(--amber); background: #fff;
  border: 1px solid var(--amber-line); border-radius: 999px;
  padding: 1px 6px; line-height: 1.5;
}

/* --- 进度恢复提示条 --- */
.resume-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 9px 13px;
  background: var(--blue-soft); border: 1px solid var(--blue-line);
  border-radius: var(--radius-sm);
  color: var(--blue); font-size: 13.5px; font-weight: 550;
}
.resume-bar[hidden] { display: none; }
.resume-bar > svg { width: 17px; height: 17px; flex: 0 0 auto; }
.resume-bar .resume-text { flex: 1 1 auto; min-width: 0; }
.resume-bar .btn { min-height: 34px; font-size: 13px; color: var(--blue); }

/* --- 右侧字幕表（住进 .side-panel 的「字幕」页签里） --- */
.transcript {
  min-height: 0;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.transcript-head {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 9px;
  padding: 11px 13px; border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}
.transcript-head .field-label { flex: 1 1 auto; }
.transcript-count {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
.follow-chip {
  appearance: none; cursor: pointer;
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 650; font-family: inherit;
  border-radius: 999px; padding: 4px 10px;
  border: 1px solid var(--green-line); background: var(--green-soft); color: var(--green-strong);
  min-height: 28px;
}
.follow-chip[data-off="1"] { border-color: var(--amber-line); background: var(--amber-soft); color: var(--amber); }
.follow-chip svg { width: 12px; height: 12px; }

.transcript-scroll {
  position: relative;
  flex: 1 1 auto; min-height: 0;
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 7px;
}

.trow {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  width: 100%;
  text-align: left;
  appearance: none; cursor: pointer; font-family: inherit; color: inherit;
  background: transparent; border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 10px 11px 10px 8px;
  margin-bottom: 2px;
  min-height: var(--tap);
  transition: background .13s ease, border-color .13s ease;
}
.trow:hover { background: var(--surface-2); border-color: var(--line); }
.trow:focus-visible { outline: 3px solid var(--green-line); outline-offset: -1px; }

.trow-time {
  font-family: var(--font-mono); font-size: 11px; font-variant-numeric: tabular-nums;
  color: var(--ink-3); padding-top: 3px; text-align: right; letter-spacing: -.01em;
}
.trow-main { min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.trow-en { font-size: 15.5px; line-height: 1.45; font-weight: 500; }
.trow-zh { font-size: 13px; line-height: 1.45; color: var(--ink-2); }
body.hide-zh .trow-zh { display: none; }
.trow-zh[data-empty="1"] {
  color: var(--ink-3); font-style: italic; font-size: 12px;
}
.trow-flag {
  display: inline-block; margin-left: 6px; font-size: 10px; font-weight: 700;
  color: var(--amber); background: var(--amber-soft); border: 1px solid var(--amber-line);
  border-radius: 5px; padding: 1px 5px; vertical-align: 1px; letter-spacing: .02em;
}

/* 片头「集名播报」：从台词里拆出来的独立一行，样式上明确区分 */
.trow[data-kind="title"] {
  background: var(--surface-2);
  border-color: var(--line);
}
.trow[data-kind="title"] .trow-en { font-weight: 700; color: var(--ink); letter-spacing: .01em; }
.trow[data-kind="title"] .trow-zh { color: var(--amber); font-weight: 620; }

/* 当前播放句 */
.trow[data-active="1"] {
  background: var(--green-soft);
  border-color: var(--green-line);
}
.trow[data-active="1"]::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 4px;
  border-radius: 0 4px 4px 0; background: var(--green);
}
.trow[data-active="1"] .trow-en { font-weight: 650; color: var(--green-strong); }
.trow[data-active="1"] .trow-time { color: var(--green); font-weight: 600; }

/* 单句模式下的目标句 */
.trow[data-selected="1"] { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green-line); }
.trow[data-selected="1"][data-active="1"] { background: var(--green-soft); }

/* 待校对 */
.trow[data-draft="1"] .trow-time { opacity: .55; }

/* 从闪卡「听这句」跳过来时，让那一行闪一下，指明卡片对应哪句台词 */
.trow-flash { animation: trowFlash 1.3s ease-out; }
@keyframes trowFlash {
  0%   { background: var(--amber-soft); box-shadow: inset 0 0 0 2px var(--amber-line); }
  60%  { background: var(--amber-soft); box-shadow: inset 0 0 0 2px var(--amber-line); }
  100% { background: transparent; box-shadow: inset 0 0 0 1px transparent; }
}
@media (prefers-reduced-motion: reduce) {
  .trow-flash { animation-duration: .01s; }
}

/* 跳转不切页签了，所以让被点的卡片自己也闪一圈，表明「就是这张」 */
.fc-card.fc-jump { animation: fcJump .9s ease-out; }
@keyframes fcJump {
  0%, 55% { outline: 3px solid var(--amber); outline-offset: 2px; border-radius: var(--radius-sm); }
  100%    { outline: 3px solid transparent; outline-offset: 2px; border-radius: var(--radius-sm); }
}

.transcript-empty { padding: 30px 18px; text-align: center; color: var(--ink-3); font-size: 14px; line-height: 1.6; }

/* ==========================================================================
   页面 3 · 内容整理
   ========================================================================== */

.import-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; align-items: start; }
.panel { padding: 18px; display: flex; flex-direction: column; gap: 13px; }
.panel h2 { margin: 0; font-size: 16.5px; font-weight: 660; display: flex; align-items: center; gap: 9px; }
.panel h2 svg { width: 18px; height: 18px; flex: 0 0 auto; color: var(--green); }
.panel h2 .badge { font-weight: 650; }
.panel p.hint { margin: 0; font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }

.drop {
  border: 2px dashed var(--line-strong); border-radius: var(--radius);
  background: var(--surface-2);
  padding: 24px 18px; text-align: center; color: var(--ink-2);
  display: flex; flex-direction: column; align-items: center; gap: 9px;
  transition: background .15s ease, border-color .15s ease;
  cursor: pointer;
}
.drop:hover, .drop[data-over="1"] { border-color: var(--green); background: var(--green-soft); }
.drop svg { width: 28px; height: 28px; color: var(--green); }
.drop strong { color: var(--ink); font-size: 15px; font-weight: 650; }
.drop small { font-size: 12.5px; color: var(--ink-3); }

.vlist { display: flex; flex-direction: column; gap: 7px; max-height: 340px; overflow-y: auto; }
.vrow {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 9px 11px; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--line);
  font-size: 13.5px; line-height: 1.5;
}
.vrow-icon { flex: 0 0 auto; width: 18px; height: 18px; margin-top: 1px; }
.vrow-icon svg { width: 18px; height: 18px; }
.vrow-body { min-width: 0; flex: 1 1 auto; }
.vrow-title { display: block; font-weight: 620; }
.vrow-msg { display: block; color: var(--ink-2); font-size: 12.5px; margin-top: 2px; word-break: break-word; }
.v-ok .vrow-icon { color: var(--green); }
.v-warn .vrow-icon { color: var(--amber); }
.v-err .vrow-icon { color: var(--danger); }
.v-err { border-color: var(--danger-line); background: var(--danger-soft); }
.v-warn { border-color: var(--amber-line); background: var(--amber-soft); }

.stat-row { display: flex; flex-wrap: wrap; gap: 9px; }
.stat {
  flex: 1 1 96px; padding: 11px 13px; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--line);
}
.stat-num { font-size: 21px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.stat-key { font-size: 11.5px; color: var(--ink-3); margin-top: 2px; }

/* ==========================================================================
   Toast
   ========================================================================== */

.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translateX(-50%) translateY(12px);
  background: rgba(35,40,31,.94); color: #F3F1EA;
  padding: 11px 18px; border-radius: 999px;
  font-size: 13.5px; font-weight: 550; line-height: 1.45;
  box-shadow: var(--shadow-2); z-index: 90; max-width: min(86vw, 520px);
  opacity: 0; pointer-events: none; transition: opacity .18s ease, transform .18s ease;
  text-align: center;
}
.toast[data-show="1"] { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ==========================================================================
   训练法相关：盲听（先听后看）/ 跟读留白 / 收听遍数
   ========================================================================== */

/* --- 盲听：遮住英文；点某一句才揭示 ---
   播放器内字幕与右侧字幕表一起被遮，点某一句才同时揭示。 */
body.blind .trow:not([data-revealed="1"]) .trow-en {
  filter: blur(6px);
  opacity: .5;
  user-select: none;
  transition: filter .18s ease, opacity .18s ease;
}
body.blind .trow[data-revealed="1"] .trow-en { filter: none; opacity: 1; }
body.blind .trow[data-revealed="1"] { background: var(--surface-2); }

/* --- 跟读留白指示条 --- */
.gap-chip {
  display: flex; align-items: center; gap: 9px;
  font-size: 13px; font-weight: 620; color: var(--green-strong);
  background: var(--green-soft); border: 1px solid var(--green-line);
  border-radius: var(--radius-sm); padding: 6px 11px;
}
.gap-chip[hidden] { display: none; }
.gap-chip .gap-icon { display: inline-flex; }
.gap-chip svg { width: 15px; height: 15px; color: var(--green); }
.gap-chip .gap-text { white-space: nowrap; font-variant-numeric: tabular-nums; }
.gap-bar {
  flex: 1 1 auto; min-width: 70px; height: 4px; border-radius: 999px;
  background: var(--green-line); overflow: hidden;
}
.gap-bar-fill {
  height: 100%; width: 0; border-radius: 999px; background: var(--green);
  transition: width .24s linear;
}

/* 跟读间隔选择：只在跟读模式出现，避免平时占位 */
.seg-gap { display: none; }
.wb[data-mode="shadow"] .seg-gap { display: inline-flex; }

/* 播完 / 控制条两组：「循环本集 / 连播下一集 / 播完即停」「一直显示 / 自动隐藏」
   文字偏长，收紧内边距，别把控制条顶到更多行 */
.seg-end button, .seg-chrome button { padding: 0 10px; }

/* --- 收听遍数徽标 --- */
.badge-pass {
  background: var(--blue-soft); color: var(--blue); border-color: var(--blue-line);
}
.badge-pass[hidden] { display: none; }
.ep-pass {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11.5px; font-weight: 650; color: var(--blue);
}
.ep-pass svg { width: 12px; height: 12px; }

/* ==========================================================================
   响应式：竖屏 / 窄屏 → 视频在上、字幕在下
   ========================================================================== */

@media (orientation: portrait), (max-width: 860px) {
  .wb-body {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto minmax(220px, 1fr);
  }
  .wb-stage { min-height: 0; }
  /* 竖屏下左侧只有播放器 + 控制器，不再像以前那样被闪卡顶出视口 */
  .wb-stage { max-height: 62vh; }
  .stage-scroll { overflow-y: auto; }
  /* 竖屏下不要给右侧面板设 min-height：它会把内容顶出 100dvh，
     而 wb-lock 又禁用了页面滚动，底部就永远够不着。
     交给上面的 grid 行 minmax(220px, 1fr) 分配剩余高度即可。 */
  .side-panel { min-height: 0; }
  .player video { max-height: 38vh; }
  /* 竖屏是上下排布，收起控制时保持单列，不参与右侧面板收窄；
     省出的高度让给播放器区域 */
  .wb.chrome-hidden .wb-body { grid-template-columns: minmax(0, 1fr); }
  .wb.chrome-hidden .wb-stage { max-height: 72vh; }
  .wb.chrome-hidden .player video { max-height: 46vh; }
  /* 竖屏面板铺满整宽：闪卡自动排成 5~6 列（卡高沿用基准值，例句才放得下） */
  .fc-emoji { font-size: 30px; }
  .page-title { font-size: 21px; }
  .ep-grid { grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 13px; }
  .continue-thumb { display: none; }
}

@media (max-width: 620px) {
  .topbar-context { display: none; }
  .brand-sub { display: none; }
  .ep-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .trow { grid-template-columns: 40px minmax(0, 1fr); }
}

/* 横屏但高度很矮（iPad 横屏 + Safari 工具栏）时的紧凑处理 */
@media (orientation: landscape) and (max-height: 520px) {
  .player video { max-height: 46vh; }
  .wb.chrome-hidden .player video { max-height: 56vh; }
  .fc-card { height: 142px; }
  .fc-emoji { font-size: 27px; }
  .fc-line { -webkit-line-clamp: 2; font-size: 11px; }
  .controls-row { padding: 8px 11px; }
}

/* ==========================================================================
   播放器状态角标（屏幕常亮 / 本机缓存）与缓冲指示
   ========================================================================== */

.player-badges {
  position: absolute; top: 10px; right: 10px; z-index: 5;
  display: flex; flex-direction: column; align-items: flex-end; gap: 6px;
  pointer-events: none;
}
.pchip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 650; line-height: 1; white-space: nowrap;
  padding: 6px 10px; border-radius: 999px;
  background: rgba(255,255,255,.88); border: 1px solid var(--line); color: var(--ink-2);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 10px rgba(0,0,0,.18);
}
.pchip[hidden] { display: none; }
.pchip-wake { color: var(--amber); border-color: var(--amber-line); background: rgba(251,240,225,.92); }
.pchip-cache[data-state="local"] { color: var(--green-strong); border-color: var(--green-line); background: rgba(230,241,234,.92); }
.pchip-cache[data-state="saving"] { color: var(--blue); border-color: var(--blue-line); background: rgba(232,241,248,.92); font-variant-numeric: tabular-nums; }
.pchip-cache[data-state="skip"],
.pchip-cache[data-state="fail"] { color: var(--ink-2); }

/* seek / 等待网络时的缓冲遮罩 —— 没有它，按了「听这句」会以为坏掉了 */
.buf-spinner {
  position: absolute; inset: 0; z-index: 6; pointer-events: none;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: rgba(18,22,15,.3); color: #F0EEE6;
  font-size: 13px; font-weight: 600;
}
.buf-spinner[hidden] { display: none; }
.buf-ring {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,.32); border-top-color: #F0EEE6;
  animation: bufspin .8s linear infinite;
}
@keyframes bufspin { to { transform: rotate(360deg); } }

/* ==========================================================================
   选集页 · 播放与存储设置卡
   ========================================================================== */

.settings-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px;
  box-shadow: var(--shadow-1);
  display: flex; flex-direction: column; gap: 14px;
}
.settings-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.settings-sub { font-size: 12.5px; color: var(--ink-3); }

.settings-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.settings-row + .settings-row { border-top: 1px dashed var(--line); padding-top: 14px; }
.settings-row-block { flex-direction: column; align-items: stretch; gap: 9px; }

.sr-label {
  display: flex; flex-direction: column; gap: 3px;
  flex: 1 1 210px; font-size: 14px; font-weight: 620; color: var(--ink);
}
.sr-hint { font-size: 12px; font-weight: 400; color: var(--ink-3); line-height: 1.55; }

.seg-mini button { min-height: 32px; padding: 0 12px; font-size: 12.5px; }
.btn-mini { min-height: 34px; padding: 0 12px; font-size: 13px; }
.btn-mini svg { width: 16px; height: 16px; }
.btn-mini[data-armed="1"] {
  background: var(--danger-soft); border-color: var(--danger-line); color: var(--danger);
}

.cache-usage { font-size: 13px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.cache-bar {
  height: 6px; border-radius: 999px; overflow: hidden;
  background: var(--surface-sunk); border: 1px solid var(--line);
}
.cache-bar-fill {
  height: 100%; width: 0; border-radius: 999px; background: var(--green);
  transition: width .3s ease;
}
.cache-bar[data-full="true"] .cache-bar-fill { background: var(--amber); }
.cache-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.cache-budget-label { font-size: 12px; font-weight: 600; color: var(--ink-3); }
.cache-actions .btn-mini { margin-left: auto; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .transcript-scroll { scroll-behavior: auto; }
}