:root {
  --ink: #1b2733;
  --ink-soft: #4a5a68;
  --paper: #f4f1ea;
  --card: #ffffff;
  --line: #e3ded3;
  --accent: #0f6b5c;
  --accent-soft: #e3f1ed;
  --amber: #c47a2c;
  --danger: #b4473f;
  --shadow: 0 10px 30px rgba(27, 39, 51, 0.08);
  --radius: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 500px at 10% -10%, #e9efe9 0%, transparent 60%),
    radial-gradient(900px 400px at 100% 0%, #f3e9dd 0%, transparent 55%),
    var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px clamp(18px, 4vw, 52px);
  background: linear-gradient(120deg, #14212b 0%, #1d3540 55%, #234b46 100%);
  color: #f7f4ec;
}

.brand { display: flex; align-items: center; gap: 14px; }

.logo {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 24px;
}

.brand-text h1 {
  font-family: Georgia, "Songti SC", "Noto Serif SC", serif;
  margin: 0;
  font-size: 24px;
  letter-spacing: 0.02em;
}

.brand-text p { margin: 2px 0 0; font-size: 12.5px; color: #c9d6d4; letter-spacing: 0.08em; }

.top-status { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

.pill {
  font-size: 12px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #e8efed;
}

.pill.ok { background: rgba(122, 214, 178, 0.18); border-color: rgba(122, 214, 178, 0.5); color: #d7f5e8; }
.pill.warn { background: rgba(244, 190, 120, 0.18); border-color: rgba(244, 190, 120, 0.5); color: #ffe4c2; }
.muted-pill { opacity: 0.7; }

.layout {
  display: grid;
  grid-template-columns: minmax(380px, 0.95fr) minmax(420px, 1.05fr);
  gap: 18px;
  padding: 20px clamp(18px, 4vw, 52px) 24px;
  align-items: start;
  max-width: 1500px;
  margin: 0 auto;
}

@media (max-width: 980px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  min-width: 0;
}

.grid2 { min-width: 0; }

.grid2 > * { min-width: 0; }

select, input[type="number"], input[type="text"], input[type="password"] { min-width: 0; }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

/* 已有成果：搜索过滤 */
.outputs-filter {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 0;
  max-width: 340px;
}

.search-icon {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  opacity: 0.55;
  pointer-events: none;
}

#output-search {
  width: 100%;
  padding: 6px 10px 6px 27px;
  font-size: 12.5px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fbfaf6;
  appearance: none;
}

#output-search::placeholder { color: #9aa5ad; }

#output-search:focus {
  outline: 2px solid rgba(15, 107, 92, 0.22);
  outline-offset: 1px;
  border-color: var(--accent);
}

#output-search::-webkit-search-cancel-button { cursor: pointer; }

#outputs-count {
  font-size: 11.5px;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .outputs-filter { flex-wrap: wrap; }
  .search-box { flex-basis: 100%; max-width: none; }

  /* 移动端「已有成果」标题栏换行，按钮不挤成竖排 */
  .card-head.sub-head { flex-wrap: wrap; row-gap: 8px; }
  .card-head.sub-head h2 { flex-basis: 100%; }
  .card-head.sub-head .hint-inline { flex-basis: 100%; }
  .card-head.sub-head .btn.small { white-space: nowrap; }
}

.card-head h2 {
  font-family: Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: 19px;
  margin: 0;
  color: var(--ink);
}

.sub-head { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); }

.muted { color: var(--ink-soft); font-size: 12.5px; }

/* 上传区 */
.dropzone {
  border: 1.5px dashed #b9c7c2;
  border-radius: 14px;
  background: #fbfaf6;
  padding: 18px;
  text-align: center;
  cursor: pointer;
  transition: 0.18s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dz-inner { display: flex; flex-direction: column; gap: 6px; align-items: center; }
.dz-inner strong { font-size: 15px; }
.dz-inner span { color: var(--ink-soft); font-size: 12.5px; }

.dz-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: #1b2733;
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.file-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.file-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #eef4f1;
  border: 1px solid #cfe0da;
  border-radius: 999px;
  padding: 5px 8px 5px 12px;
  font-size: 12.5px;
  color: #1e4039;
}

.file-list button {
  border: none;
  background: transparent;
  color: #56766e;
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  padding: 2px;
}

.field { margin-top: 14px; }

.field > label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip { position: relative; cursor: pointer; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }

.chip span {
  display: inline-block;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fbfaf6;
  font-size: 13px;
  color: var(--ink-soft);
  transition: 0.15s ease;
}

.chip input:checked + span {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.chip input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.hint { margin: 8px 0 0; color: #8a969f; font-size: 12px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

select, input[type="number"], input[type="text"], input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fbfaf6;
  font-size: 13.5px;
  color: var(--ink);
  appearance: none;
}

select:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 107, 92, 0.12);
}

.input-suffix { position: relative; }
.input-suffix input { padding-right: 40px; }
.input-suffix span {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12.5px;
  color: var(--ink-soft);
}

.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.btn {
  border: 1px solid transparent;
  border-radius: 11px;
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.16s ease;
  font-family: inherit;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(15, 107, 92, 0.25);
}

.btn.primary:hover { background: #0c5a4e; transform: translateY(-1px); }
.btn.primary:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn.ghost {
  background: #fbfaf6;
  border-color: var(--line);
  color: var(--ink);
}

.btn.ghost:hover { border-color: #b9c7c2; background: #f2efe7; }
.btn.small { padding: 7px 13px; font-size: 12.5px; }

/* 进度 */
.progress-wrap { margin: 4px 0 16px; }

.progress {
  height: 9px;
  border-radius: 999px;
  background: #eae5da;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #0f6b5c, #2f9480);
  transition: width 0.35s ease;
}

.progress-message {
  margin: 8px 0 0;
  font-size: 12.5px;
  color: var(--ink-soft);
  min-height: 18px;
}

.status { font-size: 12px; padding: 5px 10px; border-radius: 999px; background: #f0ece3; color: var(--ink-soft); }
.status.running { background: #fff2df; color: #9a5b16; }
.status.done { background: #e3f1ed; color: #0f6b5c; }
.status.error { background: #f7e4e2; color: var(--danger); }

.stack { display: flex; flex-direction: column; gap: 12px; }

.paper-card {
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 14px 16px;
  background: #fffdf9;
}

.paper-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.paper-head h3 {
  font-size: 14.5px;
  margin: 0 0 3px;
  line-height: 1.4;
  font-weight: 650;
}

.paper-head p { margin: 0; font-size: 11.5px; }

.icon-btn {
  border: none;
  background: transparent;
  color: #a6aeb4;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 8px;
}

.icon-btn:hover { color: var(--danger); background: #f7e4e2; }

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

/* 已有成果：单篇默认折叠，点标题展开（列表整体紧凑） */
#outputs.stack { gap: 7px; }

#outputs .paper-card { padding: 8px 12px; }

#outputs .paper-head { margin-bottom: 0; gap: 10px; }

#outputs .paper-card.expanded .paper-head { margin-bottom: 6px; }

#outputs .paper-title { gap: 6px; }

#outputs .paper-title h3 {
  font-size: 13.5px;
  line-height: 1.35;
  margin: 0 0 1px;
}

#outputs .paper-title-text p {
  font-size: 11px;
  line-height: 1.3;
}

#outputs .paper-card.collapsible:not(.expanded) .paper-title-text h3,
#outputs .paper-card.collapsible:not(.expanded) .paper-title-text p {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#outputs .paper-actions { gap: 6px; }

#outputs .paper-actions .btn.small {
  padding: 4px 9px;
  font-size: 12px;
}

#outputs .badge { padding: 3px 7px; font-size: 11px; }

#outputs .icon-btn { font-size: 17px; padding: 0 4px; }

#outputs .paper-card.expanded .section-row { padding: 7px 0; }

.paper-title {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex: 1;
  min-width: 0;
  cursor: pointer;
  user-select: none;
  border-radius: 8px;
}

.paper-title-text { min-width: 0; }

.paper-title:hover h3 { color: var(--accent); }

.paper-title:focus-visible {
  outline: 2px solid rgba(15, 107, 92, 0.35);
  outline-offset: 3px;
}

.chevron {
  display: inline-block;
  width: 16px;
  text-align: center;
  color: #71808c;
  font-size: 14px;
  line-height: 1;
  margin-top: 2px;
  flex-shrink: 0;
  transition: transform 0.18s ease, color 0.18s ease;
}

.paper-card.collapsible.expanded .chevron { transform: rotate(90deg); color: var(--accent); }

.paper-card.collapsible .paper-body { display: none; }

.paper-card.collapsible.expanded .paper-body { display: block; }

.paper-actions .btn.small { white-space: nowrap; }

.badge {
  font-size: 11.5px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f7f4ec;
  color: var(--ink-soft);
  white-space: nowrap;
}

.badge.ok {
  background: var(--accent-soft);
  border-color: rgba(15, 107, 92, 0.35);
  color: var(--accent);
}

.publish-icon { margin-right: 3px; }

.btn.ghost.publish:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn.ghost.publish:disabled { opacity: 0.5; cursor: not-allowed; }

.hint-inline { font-size: 11.5px; }

@media (max-width: 640px) {
  .paper-head { flex-wrap: wrap; }
  .paper-actions { width: 100%; justify-content: flex-end; }

  /* 已有成果：窄屏保持一行，发布按钮只留图标 */
  #outputs .paper-head { flex-wrap: nowrap; align-items: center; }
  #outputs .paper-actions { width: auto; }
  #outputs .publish-label { display: none; }
  #outputs .paper-actions .btn.small { padding: 4px 7px; }
}

.section-row {
  display: grid;
  grid-template-columns: minmax(96px, auto) minmax(112px, auto) 112px auto;
  align-items: center;
  gap: 12px;
  padding: 9px 0;
  border-top: 1px dashed #ece7dc;
}

.section-name { font-size: 13px; font-weight: 600; color: var(--accent); }
.section-meta { font-size: 11.5px; color: var(--ink-soft); white-space: nowrap; }

.play-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid #cfe0da;
  border-radius: 999px;
  background: #f2f8f6;
  color: var(--accent);
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  padding: 7px 13px;
  cursor: pointer;
  transition: 0.16s ease;
}

.play-btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.play-icon { font-size: 11px; line-height: 1; }

.downloads { display: flex; gap: 8px; }
.downloads a {
  font-size: 11.5px;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid #cfe0da;
  border-radius: 7px;
  padding: 4px 7px;
  background: #f2f8f6;
}

.downloads a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

.empty { color: #98a2a9; font-size: 13px; text-align: center; padding: 22px 0; }

.hidden { display: none !important; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 6px clamp(18px, 4vw, 52px) 26px;
  color: #8a969f;
  font-size: 12px;
  max-width: 1500px;
  margin: 0 auto;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  background: #1b2733;
  color: #fff;
  padding: 11px 20px;
  border-radius: 10px;
  font-size: 13.5px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  z-index: 50;
  max-width: 90vw;
}

.toast.error { background: #7d2a24; }

@media (max-width: 640px) {
  .section-row { grid-template-columns: 1fr auto; }
  .section-row .section-name { grid-column: 1; }
  .section-row .section-meta { grid-column: 2; text-align: right; }
  .section-row .play-btn { grid-column: 1; justify-self: start; }
  .section-row .downloads { grid-column: 2; justify-content: flex-end; }
  .grid2 { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; }
}

.inline-check {
  display: flex !important;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500 !important;
  color: var(--ink-soft) !important;
  cursor: pointer;
}

.inline-check input { width: 15px; height: 15px; accent-color: var(--accent); }

/* ---------------- 可可英语风格播放器 ---------------- */

body.player-open { overflow: hidden; }

.player-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 18px;
}

.player-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 27, 33, 0.58);
  backdrop-filter: blur(5px);
}

.player-dialog {
  position: relative;
  width: min(940px, 100%);
  max-height: min(90vh, 920px);
  display: flex;
  flex-direction: column;
  background: #fffdf9;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(15, 27, 33, 0.28);
  overflow: hidden;
}

.player-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 24px 8px;
}

.player-eyebrow {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

#player-title {
  font-family: Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: 21px;
  line-height: 1.35;
  margin: 0;
  color: var(--ink);
}

.player-icon {
  display: inline-grid;
  place-items: center;
  min-width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #f7f4ec;
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  transition: 0.15s ease;
  font-family: inherit;
}

.player-icon:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.player-icon.small { min-width: 32px; height: 32px; font-size: 13px; }
.player-icon.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.player-close {
  border: none;
  background: transparent;
  font-size: 27px;
  line-height: 1;
  color: #8a969f;
  min-width: 34px;
  height: 34px;
  padding: 0;
}

.player-close:hover { background: #f7e4e2; color: var(--danger); }

#player-audio { display: none; }

.player-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 24px 10px;
  flex-wrap: wrap;
}

.player-play {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 21px;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(15, 107, 92, 0.28);
  transition: 0.15s ease;
}

.player-play:hover { background: #0c5a4e; transform: translateY(-1px); }
.player-play.playing { background: #1d3540; }

.player-extras {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#player-rate {
  width: auto;
  min-width: 72px;
  padding: 7px 9px;
  font-size: 12px;
}

.player-check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
}

.player-check input { accent-color: var(--accent); }

.player-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 24px 8px;
}

.player-progress span {
  min-width: 42px;
  font-size: 11.5px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.player-progress span:last-child { text-align: right; }

#player-seek {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}

.player-subtitle-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #f7f4ec;
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.player-lyrics {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px 14px;
  background: #fbfaf6;
  scroll-behavior: smooth;
}

.lyric-line {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  border: none;
  border-left: 3px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: inherit;
  font: inherit;
  padding: 11px 12px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.lyric-line:hover { background: #f2efe7; }
.lyric-line.active { background: var(--accent-soft); border-left-color: var(--accent); }

.lyric-index {
  min-width: 22px;
  padding-top: 2px;
  font-size: 10.5px;
  color: #9aa6ae;
  font-variant-numeric: tabular-nums;
}

.lyric-text { flex: 1; min-width: 0; }
.lyric-en { font-size: 14.5px; line-height: 1.6; color: var(--ink); }
.lyric-zh { font-size: 13px; line-height: 1.65; color: var(--ink-soft); margin-top: 4px; }
.hide-translation .lyric-zh { display: none; }

.player-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 24px;
  border-top: 1px solid var(--line);
  background: #fffdf9;
  flex-wrap: wrap;
}

.player-section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-soft);
}

#player-section {
  width: auto;
  min-width: 130px;
  padding: 7px 9px;
  font-size: 12px;
}

.player-tip { font-size: 11px; color: #9aa6ae; }

.player-empty {
  color: #98a2a9;
  font-size: 13px;
  text-align: center;
  padding: 28px 0;
}

@media (max-width: 720px) {
  .player-dialog { max-height: 94vh; }
  .player-header { padding: 14px 16px 6px; }
  .player-controls { padding: 2px 16px 8px; }
  .player-extras { margin-left: 0; width: 100%; }
  .player-progress { padding: 0 16px 8px; }
  .player-subtitle-head, .player-footer { padding-left: 16px; padding-right: 16px; }
  .player-lyrics { padding-left: 6px; padding-right: 6px; }
  .player-footer { flex-direction: column; align-items: flex-start; }
}

/* ---------------- 公开学习库 ---------------- */

.library-page { background: var(--paper); }

.library-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px clamp(18px, 4vw, 52px);
  background: linear-gradient(120deg, #14212b 0%, #1d3540 55%, #234b46 100%);
  color: #f7f4ec;
}

.library-stats { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.library-stats .pill { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.18); color: #e8efed; }
.library-stats .muted-pill { opacity: .7; }

.library-layout {
  display: grid;
  grid-template-columns: minmax(290px, 360px) minmax(0, 1fr);
  gap: 22px;
  max-width: 1500px;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 52px) 34px;
  align-items: start;
}

.library-sidebar {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 150px);
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.library-sidebar-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.library-sidebar-head h2 { font-family: Georgia, "Songti SC", serif; font-size: 18px; margin: 0; }

.library-search {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 11px;
  background: #fbfaf6;
  margin-bottom: 12px;
}

.library-search span { font-size: 13px; color: #9aa6ae; }
.library-search input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font: inherit;
  font-size: 13px;
  color: var(--ink);
}

.library-list { overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding-right: 2px; }

.library-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 11px;
  background: #fbfaf6;
  padding: 10px 11px;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: 0.15s ease;
}

.library-item:hover { border-color: #cfe0da; background: #f4f8f5; }
.library-item.active { border-color: var(--accent); background: var(--accent-soft); }

.library-item-number {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  background: #e3f1ed;
  border-radius: 6px;
  padding: 3px 6px;
  margin-top: 2px;
}

.library-item-body { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.library-item-title { font-size: 13px; line-height: 1.45; font-weight: 600; color: var(--ink); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.library-item-meta { font-size: 11px; color: var(--ink-soft); }

.library-main { min-width: 0; }

.library-detail {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  min-height: 520px;
}

.library-empty { padding: 74px 20px; text-align: center; color: var(--ink-soft); }
.library-empty h2 { font-family: Georgia, "Songti SC", serif; font-size: 22px; margin: 8px 0 6px; color: var(--ink); }
.library-empty p { max-width: 430px; margin: 0 auto; font-size: 13px; line-height: 1.7; }
.library-empty-icon { font-size: 28px; color: var(--accent); }

.library-eyebrow { margin: 0 0 5px; color: var(--accent); font-size: 11.5px; letter-spacing: .06em; }
.library-paper-card { border: none; background: transparent; padding: 0; }
.library-paper-card .paper-head { margin-bottom: 6px; }
.library-paper-card .paper-head h3 { font-size: 18px; font-family: Georgia, "Songti SC", serif; }
.library-section-row { border-top-color: #ece7dc; }

.library-section-row .section-study-count { color: var(--accent); font-weight: 600; }

.library-link { text-decoration: none; color: #d7f5e8; }

@media (max-width: 900px) {
  .library-layout { grid-template-columns: 1fr; }
  .library-sidebar { position: static; max-height: none; }
  .library-list { max-height: 320px; }
  .library-topbar { flex-direction: row; align-items: center; flex-wrap: wrap; }
  .library-detail.is-empty { display: none; }
}

@media (max-width: 640px) {
  .library-detail { padding: 14px; }
  .library-paper-card .paper-head h3 { font-size: 16px; }
  .library-section-row { grid-template-columns: 1fr auto; }
  .library-section-row .section-meta { grid-column: 1 / -1; }
  .library-section-row .play-btn { grid-column: 1; }
  .library-section-row .downloads { grid-column: 2; }
}

/* ---------------- 字幕查词 ---------------- */

.word {
  cursor: pointer;
  border-radius: 3px;
  transition: background 0.12s ease, color 0.12s ease;
}

.word:hover { background: #fff0c8; color: #6b4a14; }
.word.lookup { background: #ffe3a3; color: #6b4a14; }

.word-popover {
  position: fixed;
  z-index: 120;
  background: #fffdf9;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 18px 50px rgba(15, 27, 33, 0.22);
  padding: 14px 16px;
  max-height: min(52vh, 420px);
  overflow-y: auto;
}

.word-pop-head {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.word-pop-head strong {
  font-family: Georgia, "Songti SC", serif;
  font-size: 20px;
  color: var(--ink);
}

.word-phonetic { font-size: 12px; color: var(--ink-soft); }

.word-pop-close {
  margin-left: auto;
  border: none;
  background: transparent;
  color: #9aa6ae;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}

.word-pop-close:hover { color: var(--danger); }

.word-meanings { padding-top: 9px; }
.word-meanings p {
  margin: 0 0 7px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink);
}

.word-source, .word-loading, .word-error {
  font-size: 11px;
  color: #9aa6ae;
  padding-top: 6px;
}

.word-error { color: var(--danger); }

/* ---------------- 手机端适配 ---------------- */

@media (max-width: 720px) {
  .topbar { padding: 16px; gap: 14px; }
  .brand { gap: 10px; }
  .logo { width: 42px; height: 42px; border-radius: 12px; font-size: 21px; }
  .brand-text h1 { font-size: 21px; }
  .brand-text p { font-size: 11.5px; }
  .top-status { gap: 6px; }
  .pill { font-size: 11px; padding: 5px 9px; }
  .layout { padding: 16px 12px 24px; gap: 16px; }
  .card { padding: 16px; border-radius: 14px; }
  .section-row { gap: 6px 10px; padding: 10px 0; }
  .section-name { font-size: 13px; }
  .section-meta { font-size: 11px; }
  .play-btn { padding: 6px 11px; font-size: 12px; }
  .downloads { gap: 5px; }
  .downloads a { padding: 3px 6px; font-size: 11px; }

  .player-modal { padding: 8px; }
  .player-dialog { max-height: 96dvh; border-radius: 16px; }
  .player-header { padding: 12px 14px 4px; gap: 10px; }
  #player-paper {
    font-size: 10.5px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  #player-title { font-size: 19px; }
  .player-controls { gap: 8px; padding: 2px 14px 6px; }
  .player-play { width: 50px; height: 50px; font-size: 19px; }
  .player-icon { min-width: 34px; height: 34px; font-size: 14px; }
  .player-icon.small { min-width: 30px; height: 30px; }
  .player-extras { gap: 6px; }
  #player-rate { min-width: 64px; padding: 6px 7px; }
  .player-progress { padding: 0 14px 6px; gap: 6px; }
  .player-progress span { min-width: 38px; font-size: 11px; }
  .player-subtitle-head { padding: 8px 14px; }
  .player-lyrics {
    padding: 6px 8px 10px;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }
  .lyric-line { gap: 8px; padding: 9px 8px; }
  .lyric-en { font-size: 13.5px; line-height: 1.55; }
  .lyric-zh { font-size: 12.5px; line-height: 1.6; }
  .lyric-index { min-width: 18px; font-size: 10px; }
  .player-footer { padding: 9px 14px calc(9px + env(safe-area-inset-bottom)); gap: 8px; }
  .player-section-label { font-size: 11.5px; }
  #player-section { min-width: 110px; }
  .word-popover { max-height: 60dvh; }

  .library-topbar { padding: 16px; }
  .library-layout { padding: 16px 12px 26px; gap: 16px; }
  .library-sidebar { padding: 14px; border-radius: 14px; }
  .library-detail { padding: 16px; border-radius: 14px; }
  .library-section-row { gap: 6px 10px; padding: 10px 0; }
  .library-paper-card .paper-head h3 { font-size: 16px; }
  .library-item { padding: 9px 10px; }
  .word-popover { max-width: calc(100vw - 16px); }
}

/* ---------------- 车载模式 + 紧凑学习库 ---------------- */

.car-panel { display: none; }

.car-mode-btn {
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  background: rgba(43, 191, 159, 0.18);
  color: #eafff8;
  font: inherit;
  font-size: 12.5px;
  font-weight: 700;
  padding: 7px 13px;
  cursor: pointer;
  white-space: nowrap;
}

.car-mode-btn:hover { background: #2bbf9f; color: #06110d; }

.library-topbar {
  padding: 13px clamp(12px, 3vw, 34px);
  gap: 12px;
}

.library-topbar .brand { gap: 9px; }
.library-topbar .logo { width: 36px; height: 36px; border-radius: 10px; font-size: 18px; }
.library-topbar .brand-text h1 { font-size: 19px; margin: 0; }
.library-stats { gap: 12px; font-size: 12px; color: #d8e7e2; align-items: center; }
.library-stats > span { white-space: nowrap; }

.library-layout { padding: 14px clamp(10px, 3vw, 34px) 18px; gap: 14px; }
.library-sidebar { padding: 12px; }
.library-search { margin-bottom: 8px; padding: 6px 9px; }
.library-item { padding: 8px 9px; gap: 8px; }
.library-item-title { font-size: 12.5px; }
.library-item-meta { font-size: 10.5px; }
.library-detail { padding: 14px; min-height: 300px; }
.library-empty { padding: 34px 10px; }
.library-empty h2 { font-size: 18px; margin: 4px 0 0; }
.library-empty-icon { font-size: 22px; }
.library-paper-card .paper-head { margin-bottom: 2px; }
.library-paper-card .paper-head h3 { font-size: 16px; line-height: 1.4; }
.library-eyebrow { font-size: 10.5px; margin-bottom: 2px; }
.library-section-row { padding: 8px 0; gap: 5px 10px; }
.library-section-row .section-meta { font-size: 10.5px; }

@media (max-width: 720px) {
  .library-topbar { padding: 10px 12px; }
  .library-topbar .logo { width: 30px; height: 30px; font-size: 15px; }
  .library-topbar .brand-text h1 { font-size: 17px; }
  .library-stats { gap: 8px; font-size: 11px; }
  .car-mode-btn { padding: 6px 10px; font-size: 11.5px; }
  .library-layout { padding: 10px; gap: 10px; }
  .library-sidebar { padding: 10px; }
  .library-detail { padding: 12px; }
  .library-empty { padding: 24px 8px; }
  .library-section-row .section-meta { font-size: 10px; }
}

/* 车载模式：深色、全屏、大字号、大按钮 */

.player-modal.car-mode {
  padding: 0;
  background: #05090d;
}

.player-modal.car-mode .player-backdrop { display: none; }

.player-modal.car-mode .player-dialog {
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  border: 0;
  border-radius: 0;
  background: #071018;
  color: #f4f8fb;
  box-shadow: none;
}

.player-modal.car-mode .player-header,
.player-modal.car-mode .player-controls,
.player-modal.car-mode .player-progress,
.player-modal.car-mode .player-subtitle-head,
.player-modal.car-mode .player-lyrics,
.player-modal.car-mode .player-footer {
  display: none;
}

.player-modal.car-mode .car-panel {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  gap: 10px;
  padding: max(12px, env(safe-area-inset-top)) 22px max(14px, env(safe-area-inset-bottom));
  background: radial-gradient(circle at 50% 20%, #12303a 0%, #071018 55%, #04070a 100%);
}

.car-top {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: #9fb4c1;
}

.car-badge {
  color: #86e7cc;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.car-section {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.car-exit {
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: #dce9ef;
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.car-stage {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  overflow-y: auto;
  padding: 4px 2px;
}

.car-en {
  margin: 0;
  font-family: Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: clamp(28px, 4.2vw, 54px);
  line-height: 1.45;
  font-weight: 600;
  color: #ffffff;
}

.car-zh {
  margin: 0;
  font-size: clamp(18px, 2.5vw, 30px);
  line-height: 1.6;
  color: #a9c0cc;
}

.car-status {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #91a7b4;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

#car-seek {
  width: 100%;
  accent-color: #2bbf9f;
  height: 28px;
}

.car-controls {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1.35fr 1fr 1.1fr;
  gap: 12px;
  align-items: stretch;
}

.car-btn {
  min-height: 76px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  color: #eaf4f6;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

.car-btn span { font-size: 22px; line-height: 1; }
.car-btn small { font-size: 10.5px; color: #9fb4c1; }
.car-btn:active { background: rgba(43, 191, 159, 0.28); }

.car-btn.car-play {
  min-height: 92px;
  border: none;
  border-radius: 50%;
  aspect-ratio: 1;
  align-self: center;
  justify-self: center;
  width: min(100%, 92px);
  background: #2bbf9f;
  color: #04110d;
  font-size: 30px;
  box-shadow: 0 10px 28px rgba(43, 191, 159, 0.25);
}

.car-extra {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.car-small {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: #b9cbd4;
  border-radius: 999px;
  padding: 9px 15px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.car-small.active,
.car-small[aria-pressed="true"] {
  color: #04110d;
  background: #2bbf9f;
  border-color: #2bbf9f;
}

@media (max-width: 720px), (max-height: 560px) {
  .player-modal.car-mode .car-panel {
    gap: 7px;
    padding-left: 14px;
    padding-right: 14px;
  }
  .car-stage { gap: 10px; }
  .car-en { font-size: clamp(23px, 6.2vw, 36px); line-height: 1.4; }
  .car-zh { font-size: clamp(16px, 4.2vw, 23px); line-height: 1.5; }
  .car-controls { gap: 7px; }
  .car-btn { min-height: 62px; border-radius: 13px; }
  .car-btn span { font-size: 18px; }
  .car-btn small { font-size: 9.5px; }
  .car-btn.car-play { min-height: 76px; width: min(100%, 76px); font-size: 24px; }
  .car-top { font-size: 11px; }
  .car-exit { padding: 7px 11px; font-size: 11px; }
  .car-extra { gap: 7px; }
  .car-small { padding: 7px 11px; font-size: 11px; }
}

@media (max-width: 900px) {
  .library-layout { align-items: stretch; }
  .library-sidebar {
    min-height: calc(100dvh - 82px);
    max-height: calc(100dvh - 82px);
  }
  .library-list { max-height: none; flex: 1; }
}

/* 车载模式：更大的触控按钮（覆盖前一条规则） */
.player-modal.car-mode .car-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 1.8vw, 18px);
}

.player-modal.car-mode .car-main-controls .car-btn {
  min-height: clamp(108px, 16vh, 148px);
  border-radius: 22px;
  gap: 7px;
}

.player-modal.car-mode .car-main-controls .car-btn span {
  font-size: clamp(34px, 5vw, 48px);
}

.player-modal.car-mode .car-main-controls .car-btn small {
  font-size: clamp(13px, 1.5vw, 16px);
  font-weight: 600;
}

.player-modal.car-mode .car-main-controls .car-btn.car-play {
  width: 100%;
  max-width: 148px;
  height: auto;
  min-height: 0;
  aspect-ratio: 1;
  justify-self: center;
  align-self: center;
  border-radius: 50%;
  font-size: clamp(44px, 8vw, 64px);
}

.player-modal.car-mode .car-secondary-controls .car-btn {
  min-height: clamp(68px, 9vh, 92px);
  border-radius: 18px;
  flex-direction: row;
  gap: 9px;
}

.player-modal.car-mode .car-secondary-controls .car-btn span {
  font-size: clamp(22px, 3vw, 30px);
}

.player-modal.car-mode .car-secondary-controls .car-btn small {
  font-size: clamp(12px, 1.5vw, 15px);
  font-weight: 600;
}

.player-modal.car-mode .car-btn.active,
.player-modal.car-mode .car-btn[aria-pressed="true"] {
  background: #2bbf9f;
  border-color: #2bbf9f;
  color: #04110d;
}

.player-modal.car-mode .car-exit {
  padding: 11px 20px;
  font-size: 15px;
  min-height: 44px;
}

@media (max-width: 720px) {
  .player-modal.car-mode .car-main-controls .car-btn {
    min-height: clamp(96px, 14vh, 124px);
  }
  .player-modal.car-mode .car-main-controls .car-btn.car-play {
    max-width: 124px;
  }
  .player-modal.car-mode .car-secondary-controls .car-btn {
    min-height: 64px;
  }
}

@media (max-height: 560px) {
  .player-modal.car-mode .car-main-controls .car-btn {
    min-height: 78px;
    border-radius: 16px;
  }
  .player-modal.car-mode .car-main-controls .car-btn.car-play {
    max-width: 88px;
    font-size: 36px;
  }
  .player-modal.car-mode .car-secondary-controls .car-btn {
    min-height: 48px;
  }
  .player-modal.car-mode .car-secondary-controls .car-btn small {
    font-size: 11px;
  }
  .player-modal.car-mode .car-stage { gap: 8px; }
  .player-modal.car-mode .car-en { font-size: clamp(22px, 3.2vw, 32px); }
  .player-modal.car-mode .car-zh { font-size: clamp(15px, 2.2vw, 21px); }
  .player-modal.car-mode .car-panel { gap: 6px; }
}

/* 车载模式按钮再放大：中间播放键占更大列 */
.player-modal.car-mode .car-main-controls {
  grid-template-columns: 1fr 1.35fr 1fr;
}

.player-modal.car-mode .car-main-controls .car-btn {
  min-height: clamp(124px, 17vh, 170px);
  border-radius: 24px;
}

.player-modal.car-mode .car-main-controls .car-btn span {
  font-size: clamp(38px, 5.5vw, 54px);
}

.player-modal.car-mode .car-main-controls .car-btn small {
  font-size: clamp(14px, 1.7vw, 18px);
}

.player-modal.car-mode .car-main-controls .car-btn.car-play {
  width: 100%;
  max-width: clamp(140px, 32vw, 176px);
  border-radius: 50%;
  font-size: clamp(50px, 9vw, 70px);
}

.player-modal.car-mode .car-secondary-controls .car-btn {
  min-height: clamp(78px, 10vh, 104px);
  border-radius: 20px;
}

.player-modal.car-mode .car-secondary-controls .car-btn span {
  font-size: clamp(24px, 3.2vw, 32px);
}

.player-modal.car-mode .car-secondary-controls .car-btn small {
  font-size: clamp(13px, 1.6vw, 16px);
}

@media (max-width: 720px) {
  .player-modal.car-mode .car-main-controls .car-btn {
    min-height: clamp(112px, 15vh, 140px);
  }
  .player-modal.car-mode .car-main-controls .car-btn.car-play {
    max-width: 140px;
  }
  .player-modal.car-mode .car-secondary-controls .car-btn {
    min-height: 72px;
  }
}

@media (max-height: 560px) {
  .player-modal.car-mode .car-main-controls .car-btn {
    min-height: 96px;
    border-radius: 18px;
  }
  .player-modal.car-mode .car-main-controls .car-btn span {
    font-size: 32px;
  }
  .player-modal.car-mode .car-main-controls .car-btn.car-play {
    max-width: 110px;
    font-size: 42px;
  }
  .player-modal.car-mode .car-secondary-controls .car-btn {
    min-height: 56px;
  }
  .player-modal.car-mode .car-stage { gap: 8px; }
}

/* ---------------- 论文详情弹出框 ---------------- */

body.paper-open { overflow: hidden; }

.paper-modal {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: grid;
  place-items: center;
  padding: 18px;
}

.paper-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 20, 26, 0.58);
  backdrop-filter: blur(4px);
}

.paper-dialog {
  position: relative;
  width: min(900px, 100%);
  max-height: min(88vh, 860px);
  overflow-y: auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 26px 70px rgba(15, 27, 33, 0.3);
  padding: 20px;
}

.paper-close {
  position: sticky;
  top: 0;
  float: right;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: #f2efe8;
  color: #7d8b94;
  font-size: 23px;
  line-height: 1;
  cursor: pointer;
}

.paper-close:hover { background: #f7e4e2; color: var(--danger); }

.paper-dialog .library-detail {
  border: none;
  box-shadow: none;
  padding: 0;
  min-height: 0;
  background: transparent;
}

.library-layout {
  display: block;
  max-width: 1180px;
  margin: 0 auto;
}

.library-sidebar {
  position: static;
  width: 100%;
  max-height: calc(100dvh - 105px);
}

.library-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 8px;
}

.library-item { min-width: 0; }

@media (max-width: 900px) {
  .library-list { grid-template-columns: 1fr; }
  .paper-modal { padding: 0; }
  .paper-dialog {
    width: 100%;
    height: 100dvh;
    max-height: none;
    border-radius: 0;
    padding: 14px;
  }
  .paper-close {
    width: 42px;
    height: 42px;
    font-size: 25px;
  }
}

.paper-dialog .paper-head { padding-right: 46px; }
@media (max-width: 900px) {
  .paper-dialog .paper-head { padding-right: 52px; }
}

/* 论文详情：移动端底部弹层 + 紧凑章节行 */
@media (max-width: 900px) {
  .paper-modal {
    padding: 0;
    align-items: end;
  }
  .paper-dialog {
    width: 100%;
    height: auto;
    max-height: 92dvh;
    border-radius: 18px 18px 0 0;
    padding: 16px 14px calc(14px + env(safe-area-inset-bottom));
  }
  .paper-close {
    top: 4px;
    width: 38px;
    height: 38px;
    font-size: 23px;
  }
  .paper-dialog .library-section-row {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "name play"
      "meta downloads";
    gap: 3px 10px;
    padding: 8px 0;
  }
  .paper-dialog .section-name { grid-area: name; align-self: center; }
  .paper-dialog .section-meta {
    grid-area: meta;
    justify-self: start;
    white-space: normal;
    font-size: 10.5px;
  }
  .paper-dialog .section-chars { display: none; }
  .paper-dialog .play-btn {
    grid-area: play;
    justify-self: end;
    align-self: center;
    padding: 6px 10px;
    font-size: 12px;
  }
  .paper-dialog .downloads {
    grid-area: downloads;
    justify-self: end;
    align-self: center;
  }
  .paper-dialog .downloads a { padding: 3px 6px; font-size: 10.5px; }
}

/* 原文 PDF 入口 */
.paper-pdf-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f7f9f6;
}

.paper-pdf-title {
  flex: 1;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
}

.paper-pdf-open,
.paper-pdf-download {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid #cfe0da;
  border-radius: 7px;
  padding: 5px 9px;
  background: #f2f8f6;
}

.paper-pdf-open:hover,
.paper-pdf-download:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

@media (max-width: 900px) {
  .paper-pdf-row { margin-top: 10px; padding: 9px 10px; }
}

/* 手机端论文列表：单行标题 + 紧凑高度 */
@media (max-width: 900px) {
  .library-list { gap: 6px; }
  .library-item {
    padding: 7px 9px;
    gap: 8px;
    align-items: center;
  }
  .library-item-number { margin-top: 0; }
  .library-item-body { gap: 2px; }
  .library-item-title {
    display: block;
    -webkit-line-clamp: unset;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.35;
  }
  .library-item-meta { font-size: 10px; line-height: 1.3; }
}

/* 修复论文少时 grid 自动行被拉伸，导致单卡片高度异常 */
.library-list {
  align-content: start;
  align-items: start;
  grid-auto-rows: min-content;
}

/* 论文少时列表面板按内容收起，避免出现一整块空白卡片 */
@media (max-width: 900px) {
  .library-sidebar {
    min-height: 0;
    max-height: none;
  }
  .library-list {
    flex: none;
    max-height: none;
  }
}

/* 论文标题完整换行，卡片高度随文本自适应；不省略、不固定高度 */
.library-list {
  align-content: start;
  align-items: start;
  grid-auto-rows: min-content;
}
.library-item {
  align-items: flex-start;
  height: auto;
}
.library-item-body {
  align-self: stretch;
}
.library-item-title {
  display: block;
  -webkit-line-clamp: unset;
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
  overflow-wrap: anywhere;
  word-break: normal;
  line-height: 1.45;
}
@media (max-width: 900px) {
  .library-item-title {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    line-height: 1.45;
  }
}

/* 正常播放器：标题在上，字幕填充中间，控制条悬浮在底部 */
.player-dialog .player-header { order: 1; }
.player-dialog .player-subtitle-head { order: 2; }
.player-dialog .player-lyrics { order: 3; min-height: 0; }
.player-dialog .player-progress { order: 4; }
.player-dialog .player-controls { order: 5; }
.player-dialog .player-footer { order: 6; }

.player-dialog .player-progress {
  padding: 8px 24px 2px;
  background: rgba(255, 253, 249, 0.94);
}

.player-dialog .player-controls {
  position: relative;
  z-index: 3;
  padding: 8px 24px 10px;
  border-top: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 -12px 30px rgba(15, 27, 33, 0.07);
}

.player-dialog .player-footer {
  position: relative;
  z-index: 3;
  border-top: 1px solid var(--line);
  background: rgba(255, 253, 249, 0.98);
}

.player-dialog .player-subtitle-head {
  border-top: none;
}

.player-dialog .player-lyrics {
  padding-top: 6px;
  padding-bottom: 8px;
}

.player-modal.car-mode .player-dialog .player-progress,
.player-modal.car-mode .player-dialog .player-controls,
.player-modal.car-mode .player-dialog .player-footer {
  display: none;
}

@media (max-width: 720px) {
  .player-dialog .player-progress { padding: 6px 16px 0; }
  .player-dialog .player-controls { padding: 7px 16px 8px; }
}

/* 正常播放器：播放控制条放在最底部，章节/下载在其上方 */
.player-dialog .player-footer { order: 5; }
.player-dialog .player-controls {
  order: 6;
  border-radius: 0 0 18px 18px;
}
@media (max-width: 720px) {
  .player-dialog .player-controls { border-radius: 0 0 16px 16px; }
}

/* 手机端正常播放器：底部控制按钮居中 */
@media (max-width: 720px) {
  .player-dialog .player-controls {
    justify-content: center;
  }
  .player-dialog .player-extras {
    width: 100%;
    justify-content: center;
  }
  .player-dialog .player-footer {
    align-items: center;
    text-align: center;
  }
  .player-dialog .player-footer .downloads {
    justify-content: center;
  }
}

/* 手机端：播放控件合并为一行，隐藏底部章节/下载行（详情页已有） */
@media (max-width: 720px) {
  .player-dialog .player-controls {
    flex-wrap: nowrap;
    gap: 5px;
    padding: 6px 8px 8px;
  }
  .player-dialog .player-extras {
    width: auto;
    flex: 0 0 auto;
    margin-left: 0;
    flex-wrap: nowrap;
    gap: 5px;
  }
  .player-dialog .player-footer {
    display: none;
  }
  .player-dialog .player-icon {
    min-width: 31px;
    height: 31px;
    font-size: 13px;
  }
  .player-dialog .player-icon.small {
    min-width: 29px;
    height: 29px;
  }
  .player-dialog .player-play {
    width: 46px;
    height: 46px;
    font-size: 18px;
  }
  .player-dialog #player-rate {
    min-width: 55px;
    padding: 5px 5px;
    font-size: 11px;
  }
  .player-dialog .player-check {
    font-size: 11px;
    gap: 3px;
  }
}

/* 播放键严格居中：左右两组控制，中间播放键 */
.player-dialog .player-controls {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
}

.player-dialog .control-side {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.player-dialog .control-left { justify-self: start; }
.player-dialog .control-right { justify-self: end; }
.player-dialog .player-controls > .player-play { justify-self: center; }

@media (max-width: 720px) {
  .player-dialog .player-controls { gap: 5px; }
  .player-dialog .control-side { gap: 5px; }
}

/* 中央控制组：上一句 - 播放 - 下一句，播放键保持屏幕中心 */
.player-dialog .control-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.player-dialog .control-center .player-play { justify-self: center; }
@media (max-width: 720px) {
  .player-dialog .control-center { gap: 5px; }
}


/* ---------------- 配置页 ---------------- */

.settings-layout {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px clamp(16px, 4vw, 40px) 96px;
}

.settings-layout .card { margin-bottom: 14px; padding: 18px 20px; }

.settings-layout .card-head h2 { font-size: 17px; }

.settings-layout .hint { margin: 6px 0 0; }

.settings-actions {
  position: sticky;
  bottom: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 0;
  background: linear-gradient(rgba(244, 241, 234, 0) 0%, var(--paper) 45%);
}

.settings-actions .muted code {
  font-size: 11.5px;
  background: #efeadf;
  padding: 2px 5px;
  border-radius: 5px;
}

@media (max-width: 640px) {
  .settings-layout { padding: 14px 12px 96px; }
  .settings-layout .card { padding: 14px; }
}

/* 车载长句：内容可自动缩放并完整显示 */
.player-modal.car-mode .car-stage {
  justify-content: flex-start;
  gap: 0;
}
.player-modal.car-mode .car-text {
  --car-scale: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: 100%;
  margin-block: auto;
}
.player-modal.car-mode .car-en {
  font-size: calc(clamp(28px, 4.2vw, 54px) * var(--car-scale));
}
.player-modal.car-mode .car-zh {
  font-size: calc(clamp(18px, 2.5vw, 30px) * var(--car-scale));
}
@media (max-width: 720px), (max-height: 560px) {
  .player-modal.car-mode .car-text { gap: 10px; }
  .player-modal.car-mode .car-en {
    font-size: calc(clamp(23px, 6.2vw, 36px) * var(--car-scale));
    line-height: 1.4;
  }
  .player-modal.car-mode .car-zh {
    font-size: calc(clamp(16px, 4.2vw, 23px) * var(--car-scale));
    line-height: 1.5;
  }
}