:root {
  --paper: #fbf9f5;
  --card: #ffffff;
  --ink: #211e1a;
  --ink-2: #4f483f;
  --muted: #8b8378;
  --faint: #b3aa9c;
  --line: #e9e2d6;
  --line-2: #f1ece2;
  --accent: #b0502a;
  --accent-ink: #8d3d1e;
  --accent-soft: #f8ede6;
  --green: #4a7259;
  --green-soft: #edf3ee;
  --amber: #a06a1f;
  --amber-soft: #fbf2e2;
  --shadow: 0 1px 2px rgba(40, 30, 15, 0.04), 0 8px 28px rgba(40, 30, 15, 0.05);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Songti SC", serif;
  --sans: "Segoe UI", -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Cascadia Mono", "SF Mono", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
select {
  font-family: inherit;
  color: inherit;
}

/* ------------------------------------------------------------ 骨架 */
.shell {
  display: grid;
  grid-template-columns: 218px 1fr;
  height: 100vh;
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 26px 16px 20px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, #fdfbf7 0%, #f9f6f0 100%);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 0 8px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--ink);
  color: #fdfbf7;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1;
  padding-bottom: 2px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-text b {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand-text i {
  font-style: normal;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 9px;
  font-size: 13.5px;
  color: var(--ink-2);
  text-align: left;
  transition: background 0.13s ease, color 0.13s ease;
}

.nav-item:hover {
  background: #f2ede4;
}

.nav-item.is-active {
  background: var(--card);
  color: var(--ink);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(40, 30, 15, 0.05);
}

.pill {
  margin-left: auto;
  min-width: 20px;
  padding: 1px 6px;
  border-radius: 20px;
  background: #eee8dd;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  text-align: center;
}

.nav-item.is-active .pill {
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.rail-foot {
  margin-top: auto;
  padding: 14px 12px;
  border-radius: 11px;
  background: #f4efe6;
}

.quota-label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.quota {
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 9px;
}

.quota-sep {
  color: var(--faint);
  margin: 0 3px;
  font-size: 15px;
}

.quota-bar {
  height: 3px;
  border-radius: 3px;
  background: #e3dbcc;
  overflow: hidden;
}

.quota-bar i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.25s ease;
}

/* ------------------------------------------------------------ 主区 */
.main {
  overflow-y: auto;
  padding: 34px 44px 60px;
}

.view[hidden] {
  display: none;
}

.view-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.view-head h1 {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.01em;
}

/* ------------------------------------------------------------ 搜索框 */
.search {
  display: flex;
  gap: 10px;
  align-items: center;
}

#q {
  flex: 1;
  height: 52px;
  padding: 0 18px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 15.5px;
  outline: none;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#q::placeholder {
  color: var(--faint);
}

#q:focus {
  border-color: #d8c4b4;
  box-shadow: 0 0 0 3px rgba(176, 80, 42, 0.08), var(--shadow);
}

.btn-query {
  height: 52px;
  padding: 0 24px;
  border-radius: 13px;
  background: var(--ink);
  color: #fdfbf7;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn-query:hover {
  background: #35302a;
}

.btn-query:active {
  transform: translateY(1px);
}

.keyhint {
  margin: 11px 2px 0;
  font-size: 11.5px;
  color: var(--faint);
  letter-spacing: 0.01em;
}

kbd {
  display: inline-block;
  min-width: 17px;
  padding: 1px 5px;
  margin: 0 1px;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: #f7f3ec;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted);
  text-align: center;
}

.stage {
  margin-top: 26px;
}

/* ------------------------------------------------------------ 词条卡 */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 17px;
  padding: 30px 34px 26px;
  box-shadow: var(--shadow);
  animation: rise 0.22s cubic-bezier(0.2, 0.7, 0.3, 1);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.headword {
  font-family: var(--serif);
  font-size: 42px;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0;
  word-break: break-word;
}

.infl-note {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--muted);
}

.infl-note b {
  font-weight: 600;
  color: var(--ink-2);
}

.phonetic-row {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.phonetic {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink-2);
  letter-spacing: 0.01em;
}

.phonetic.is-empty {
  color: var(--faint);
  font-style: italic;
  font-family: var(--sans);
  font-size: 12.5px;
}

.speak-group {
  display: flex;
  gap: 5px;
  margin-left: 2px;
}

.speak {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 26px;
  padding: 0 9px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: #fdfbf8;
  font-size: 11px;
  color: var(--ink-2);
  letter-spacing: 0.02em;
  transition: background 0.13s ease, border-color 0.13s ease;
}

.speak:hover {
  background: var(--accent-soft);
  border-color: #e6cdbd;
  color: var(--accent-ink);
}

.speak:active {
  transform: translateY(1px);
}

.tags {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.tag {
  padding: 2.5px 8px;
  border-radius: 5px;
  background: #f4f0e8;
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tag.rank {
  background: var(--green-soft);
  color: var(--green);
  text-transform: none;
  letter-spacing: 0;
}

.divider {
  height: 1px;
  background: var(--line-2);
  margin: 22px 0 18px;
}

.senses {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.sense {
  display: flex;
  gap: 11px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
}

.pos {
  flex: none;
  min-width: 34px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--accent);
  padding-top: 2px;
}

.sense-text {
  flex: 1;
}

.english-def {
  margin-top: 18px;
  padding: 13px 15px;
  border-radius: 10px;
  background: #faf7f1;
  border: 1px solid var(--line-2);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

.english-def .label {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.09em;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 5px;
}

/* ------------------------------------------------------------ 操作区 */
.actions {
  display: flex;
  gap: 9px;
  align-items: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line-2);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 16px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 13px;
  color: var(--ink-2);
  transition: all 0.13s ease;
}

.btn:hover {
  border-color: #dcd2c2;
  background: #fdfbf7;
}

.btn .k {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--faint);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 4px;
  line-height: 15px;
}

.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fdfbf7;
}

.btn-primary:hover {
  background: #35302a;
  border-color: #35302a;
}

.btn-primary .k {
  color: rgba(253, 251, 247, 0.55);
  border-color: rgba(253, 251, 247, 0.25);
}

.btn.is-chosen {
  background: var(--accent-soft);
  border-color: #e6cdbd;
  color: var(--accent-ink);
}

.actions .spacer {
  flex: 1;
}

.saved-mark {
  font-size: 12px;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* ------------------------------------------------------------ 整句 */
.sentence-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}

.sentence-source {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink);
  margin: 0 0 6px;
  word-break: break-word;
}

.metrics {
  display: flex;
  gap: 18px;
  margin: 18px 0 6px;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.metric b {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1;
}

.metric span {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.03em;
}

.token-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.token {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #fdfbf8;
  text-align: left;
  transition: all 0.13s ease;
  max-width: 210px;
}

.token:hover {
  border-color: #dfcabb;
  background: var(--accent-soft);
}

.token b {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 500;
}

.token span {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.token.unknown b {
  color: var(--accent-ink);
}

.token.unknown {
  border-style: dashed;
}

.note {
  margin-top: 18px;
  padding: 12px 15px;
  border-radius: 10px;
  background: var(--amber-soft);
  font-size: 12.5px;
  line-height: 1.6;
  color: #6f5119;
}

/* ------------------------------------------------------------ 空状态 */
.empty {
  padding: 34px 0 10px;
}

.empty-title {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink-2);
  margin: 0 0 4px;
}

.empty-sub {
  font-size: 12.5px;
  color: var(--faint);
  margin: 0 0 18px;
}

.recent {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.recent-chip {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 13px;
  color: var(--ink-2);
  font-family: var(--serif);
  transition: all 0.13s ease;
}

.recent-chip:hover {
  border-color: #dfcabb;
  color: var(--accent-ink);
  background: var(--accent-soft);
}

.recent-chip small {
  font-family: var(--sans);
  font-size: 10px;
  color: var(--faint);
  margin-left: 6px;
}

/* ------------------------------------------------------------ 词库 */
.seg {
  display: flex;
  gap: 2px;
  padding: 3px;
  border-radius: 9px;
  background: #f2ede4;
}

.seg button {
  padding: 5px 13px;
  border-radius: 7px;
  font-size: 12.5px;
  color: var(--muted);
  transition: all 0.13s ease;
}

.seg button.is-active {
  background: var(--card);
  color: var(--ink);
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(40, 30, 15, 0.06);
}

.bank-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  overflow: hidden;
}

.bank-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-2);
  transition: background 0.12s ease;
}

.bank-row:last-child {
  border-bottom: none;
}

.bank-row:hover {
  background: #fdfbf7;
}

.bank-word {
  font-family: var(--serif);
  font-size: 17px;
  min-width: 150px;
  text-align: left;
}

.bank-word:hover {
  color: var(--accent-ink);
}

.bank-phonetic {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--faint);
  min-width: 90px;
}

.bank-mean {
  flex: 1;
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tier-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: none;
}

.tier-dot.active {
  background: var(--accent);
}

.tier-dot.passive {
  background: var(--green);
}

.icon-btn {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  color: var(--faint);
  font-size: 15px;
  transition: all 0.13s ease;
}

.icon-btn:hover {
  background: #f6e9e2;
  color: var(--accent);
}

.bank-empty {
  padding: 60px 0;
  text-align: center;
  color: var(--faint);
  font-size: 13px;
}

.mini-tier {
  flex: none;
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: transparent;
  font-size: 11.5px;
  color: var(--faint);
  transition: all 0.13s ease;
}

.mini-tier:hover {
  border-color: #dcd2c2;
  color: var(--ink-2);
}

.mini-tier.on {
  background: var(--accent-soft);
  border-color: #e6cdbd;
  color: var(--accent-ink);
  font-weight: 500;
}

/* ------------------------------------------------------------ 设置 */
.settings {
  max-width: 620px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.set-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line-2);
}

.set-row:last-child {
  border-bottom: none;
}

.set-label {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.set-label b {
  font-size: 13.5px;
  font-weight: 500;
}

.set-label span {
  font-size: 11.5px;
  color: var(--faint);
  line-height: 1.5;
}

.set-control select,
.set-control input[type="number"] {
  height: 32px;
  padding: 0 10px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 12.5px;
  outline: none;
  min-width: 130px;
}

.set-control select:focus,
.set-control input:focus {
  border-color: #d8c4b4;
}

.switch {
  position: relative;
  width: 38px;
  height: 21px;
  border-radius: 20px;
  background: #e3dbcc;
  transition: background 0.18s ease;
  flex: none;
}

.switch::after {
  content: "";
  position: absolute;
  top: 2.5px;
  left: 2.5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
  transition: transform 0.18s ease;
}

.switch.on {
  background: var(--green);
}

.switch.on::after {
  transform: translateX(17px);
}

.about {
  margin-top: 30px;
  padding: 16px 18px;
  border-radius: 11px;
  background: #f7f3ec;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--muted);
}

.about code {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-2);
  word-break: break-all;
}

.link-btn {
  font-size: 12px;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ------------------------------------------------------------ Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 12px);
  padding: 11px 20px;
  border-radius: 10px;
  background: rgba(33, 30, 26, 0.94);
  color: #fdfbf7;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  max-width: 460px;
  text-align: center;
  line-height: 1.5;
  z-index: 50;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ------------------------------------------------------------ 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-thumb {
  background: #e0d8c9;
  border-radius: 10px;
  border: 3px solid var(--paper);
}

::-webkit-scrollbar-thumb:hover {
  background: #cfc4b1;
}

::-webkit-scrollbar-track {
  background: transparent;
}

/* ------------------------------------------------------------ 分级提示 */
.tier-state {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.tier-chip {
  flex: none;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.tier-chip.active {
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.tier-chip.passive {
  background: var(--green-soft);
  color: var(--green);
}

.tier-reason {
  font-size: 11.5px;
  color: var(--faint);
  line-height: 1.5;
}

/* ------------------------------------------------------------ 复习：队列 */
.rev-sub {
  font-size: 12.5px;
  color: var(--muted);
}

.queue-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.queue-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 24px 20px;
  border-radius: 15px;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
}

.queue-card.is-empty {
  opacity: 0.55;
  box-shadow: none;
}

.queue-tier {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--ink-2);
  font-weight: 500;
}

.queue-num {
  font-family: var(--serif);
  font-size: 46px;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-top: 6px;
}

.queue-desc {
  font-size: 11.5px;
  color: var(--faint);
  margin-bottom: 12px;
  line-height: 1.5;
}

.queue-start {
  align-self: flex-start;
}

.btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.rev-foot {
  display: flex;
  gap: 44px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line-2);
}

.rev-foot-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.rev-foot-item b {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  line-height: 1;
}

.rev-foot-item span {
  font-size: 11px;
  color: var(--faint);
}

.rev-empty {
  padding: 70px 0;
  text-align: center;
}

.rev-empty-icon {
  width: 46px;
  height: 46px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green);
  font-size: 22px;
}

/* ------------------------------------------------------------ 复习：答题 */
.rev-progress {
  height: 3px;
  border-radius: 3px;
  background: #ece5d9;
  overflow: hidden;
  margin-bottom: 8px;
}

.rev-progress i {
  display: block;
  height: 100%;
  background: var(--accent);
  transition: width 0.25s ease;
}

.rev-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
  margin-bottom: 22px;
}

.rev-card {
  padding: 34px 38px 30px;
  border-radius: 17px;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  animation: rise 0.2s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.rev-tier-line {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: var(--faint);
  letter-spacing: 0.03em;
  margin-bottom: 18px;
}

.rev-meaning {
  font-size: 24px;
  line-height: 1.45;
  color: var(--ink);
  margin-bottom: 14px;
}

.rev-sentence {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-2);
  padding: 12px 15px;
  border-left: 2px solid var(--line);
  background: #faf7f1;
  border-radius: 0 8px 8px 0;
  margin-bottom: 16px;
}

.rev-hint {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--faint);
  letter-spacing: 0.16em;
  margin-bottom: 12px;
}

.rev-input {
  width: 100%;
  height: 48px;
  padding: 0 15px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: #fdfbf8;
  font-size: 17px;
  font-family: var(--serif);
  letter-spacing: 0.01em;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.rev-input:focus {
  border-color: #d8c4b4;
  box-shadow: 0 0 0 3px rgba(176, 80, 42, 0.08);
}

.rev-input:disabled {
  background: #f6f2ea;
  color: var(--faint);
}

.rev-submit {
  margin-top: 14px;
}

.rev-feedback:empty {
  display: none;
}

.rev-verdict {
  margin-top: 18px;
  font-size: 14px;
  font-weight: 500;
}

.rev-verdict.ok {
  color: var(--green);
}

.rev-verdict.bad {
  color: var(--accent);
}

.rev-answer {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 8px;
}

.rev-answer-word {
  font-family: var(--serif);
  font-size: 26px;
}

.rev-answer-phon {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}

.rev-answer-mean {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.rev-next-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
}

.rev-next-hint {
  font-size: 11.5px;
  color: var(--faint);
}

/* 认识层 */
.rev-word {
  font-family: var(--serif);
  font-size: 46px;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-bottom: 10px;
}

.rev-phonetic {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 18px;
}

.rev-rate-row {
  display: flex;
  gap: 10px;
  margin-top: 26px;
}

.rev-rate {
  flex: 1;
  height: 52px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 14px;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.13s ease;
}

.rev-rate .k {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--faint);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 4px;
  line-height: 15px;
}

.rev-rate:hover {
  transform: translateY(-1px);
}

.rev-rate.bad:hover {
  border-color: #e2b9a8;
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.rev-rate.mid:hover {
  border-color: #e6d3ae;
  background: var(--amber-soft);
  color: var(--amber);
}

.rev-rate.good:hover {
  border-color: #bfd4c6;
  background: var(--green-soft);
  color: var(--green);
}

.rev-next {
  margin-top: 20px;
}

/* 小结 */
.rev-summary {
  padding: 70px 0;
  text-align: center;
}

.rev-summary-num {
  font-family: var(--serif);
  font-size: 64px;
  line-height: 1;
  letter-spacing: -0.03em;
}

.rev-summary-label {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.rev-summary-rate {
  margin: 18px 0 28px;
  font-size: 15px;
  color: var(--accent-ink);
}

/* ============================================================
   手机 / 窄屏
   电脑上是「左侧栏 + 内容区」两栏，手机上改成「顶栏 + 单栏」，
   所有双列布局压成一列，触控目标放大到 40px 以上。
   ============================================================ */
@media (max-width: 760px) {
  html,
  body {
    height: auto;
    overflow: auto;
    -webkit-text-size-adjust: 100%;
  }

  .shell {
    display: block;
    height: auto;
    min-height: 100dvh;
  }

  /* 侧栏变顶栏，滚动时吸顶 */
  .rail {
    position: sticky;
    top: 0;
    z-index: 30;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-right: none;
    border-bottom: 1px solid var(--line);
    background: rgba(251, 249, 245, 0.94);
    backdrop-filter: saturate(1.2) blur(10px);
  }

  .brand {
    padding: 0;
    gap: 8px;
  }

  .brand-mark {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    font-size: 15px;
  }

  .brand-text b {
    font-size: 12.5px;
  }

  .brand-text i {
    display: none;
  }

  .nav {
    flex-direction: row;
    gap: 1px;
    margin-left: auto;
  }

  .nav-item {
    padding: 7px 8px;
    font-size: 12.5px;
    border-radius: 7px;
    gap: 3px;
  }

  .nav-item .pill {
    display: none;
  }

  .rail-foot {
    display: none;
  }

  .main {
    padding: 14px 13px 56px;
    overflow: visible;
  }

  /* 搜索区 */
  .search {
    gap: 8px;
  }

  #q {
    height: 46px;
    padding: 0 13px;
    font-size: 16px; /* 16px 以下 iOS 会自动放大页面 */
    border-radius: 11px;
  }

  .btn-query {
    height: 46px;
    padding: 0 16px;
    border-radius: 11px;
    font-size: 13.5px;
  }

  .keyhint {
    display: none;
  }

  .stage {
    margin-top: 16px;
  }

  /* 词条卡 */
  .card {
    padding: 20px 17px 17px;
    border-radius: 14px;
  }

  .headword {
    font-size: 33px;
  }

  .sense {
    font-size: 14.5px;
    gap: 8px;
  }

  .pos {
    min-width: 30px;
  }

  .english-def {
    font-size: 12.5px;
    padding: 11px 12px;
  }

  .actions {
    gap: 7px;
    margin-top: 18px;
    padding-top: 15px;
  }

  .btn {
    height: 42px;
    padding: 0 13px;
    font-size: 12.5px;
  }

  .actions .spacer {
    display: none;
  }

  .saved-mark {
    width: 100%;
    margin-top: 2px;
  }

  .tier-state {
    margin-top: 12px;
  }

  /* 整句 / 短语的词块：一行两个，别挤成一长条 */
  .token-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 7px;
  }

  .token {
    max-width: none;
  }

  .metrics {
    gap: 24px;
  }

  /* 复习 */
  .queue-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .queue-card {
    padding: 17px 18px 16px;
  }

  .queue-num {
    font-size: 36px;
  }

  .rev-foot {
    gap: 22px;
    flex-wrap: wrap;
    margin-top: 24px;
    padding-top: 18px;
  }

  .rev-card {
    padding: 22px 17px;
    border-radius: 14px;
  }

  .rev-meaning {
    font-size: 19px;
  }

  .rev-word {
    font-size: 36px;
  }

  .rev-sentence {
    font-size: 14.5px;
    padding: 10px 12px;
  }

  .rev-input {
    height: 48px;
    font-size: 16px;
  }

  /* 三个评分按钮竖着排，拇指更容易点中 */
  .rev-rate-row {
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
  }

  .rev-rate {
    height: 48px;
    font-size: 14.5px;
  }

  .rev-next-row {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  /* 词库：一行放不下就换行 */
  .bank-row {
    flex-wrap: wrap;
    gap: 7px;
    padding: 12px 13px;
  }

  .bank-word {
    min-width: 0;
    font-size: 16px;
  }

  .bank-phonetic {
    min-width: 0;
  }

  .bank-mean {
    flex-basis: 100%;
    order: 9;
    font-size: 12px;
  }

  .mini-tier {
    padding: 5px 9px;
    font-size: 11.5px;
  }

  .icon-btn {
    width: 30px;
    height: 30px;
  }

  /* 设置项：标签在上，控件在下 */
  .set-row {
    flex-direction: column;
    align-items: stretch;
    gap: 9px;
    padding: 14px 0;
  }

  .set-control select,
  .set-control input[type="number"] {
    width: 100%;
    height: 38px;
    font-size: 13.5px;
  }

  .switch {
    width: 46px;
    height: 26px;
  }

  .switch::after {
    width: 21px;
    height: 21px;
    top: 2.5px;
    left: 2.5px;
  }

  .switch.on::after {
    transform: translateX(20px);
  }

  .view-head h1 {
    font-size: 21px;
  }

  .toast {
    left: 13px;
    right: 13px;
    bottom: 18px;
    transform: translateY(12px);
    max-width: none;
  }

  .toast.show {
    transform: translateY(0);
  }
}

/* 小屏手机：顶栏只留图标，把横向空间全给导航 */
@media (max-width: 420px) {
  .brand-text {
    display: none;
  }

  .nav-item {
    padding: 7px 6px;
    font-size: 12px;
  }

  .headword {
    font-size: 30px;
  }

  .rev-word {
    font-size: 32px;
  }
}

/* 手机横屏 / 小平板 */
@media (min-width: 761px) and (max-width: 1024px) {
  .main {
    padding: 26px 28px 48px;
  }

  .shell {
    grid-template-columns: 180px 1fr;
  }
}