/* ==========================================================================
   高中英语 3500 词 · 默写训练
   样式：移动端优先，企业微信内置浏览器 / 手机 / 桌面通用
   ========================================================================== */

:root {
  --bg: #eef2f9;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #ffffff 0%, #eef2f9 55%, #e7edf8 100%);
  --card: #ffffff;
  --card-soft: #f6f8fc;
  --line: #e3e9f3;
  --text: #16202f;
  --text-2: #5d6c83;
  --text-3: #93a1b5;
  --primary: #2f6bff;
  --primary-deep: #1f52d6;
  --primary-soft: #e9f0ff;
  --ok: #0f9d63;
  --ok-soft: #e6f7ef;
  --err: #e0453f;
  --err-soft: #fdecec;
  --warn: #d98708;
  --radius-l: 20px;
  --radius-m: 14px;
  --radius-s: 10px;
  --shadow: 0 1px 2px rgba(22, 32, 47, .04), 0 10px 30px -16px rgba(22, 32, 47, .22);
  --shadow-lift: 0 2px 6px rgba(22, 32, 47, .06), 0 18px 40px -20px rgba(22, 32, 47, .3);
}

[data-theme="dark"] {
  --bg: #0d121b;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #182234 0%, #0d121b 60%, #0a0e15 100%);
  --card: #161d29;
  --card-soft: #1c2432;
  --line: #263041;
  --text: #e9eef7;
  --text-2: #a3b1c6;
  --text-3: #6f7f96;
  --primary: #5b8cff;
  --primary-deep: #3f74ff;
  --primary-soft: #1b2a48;
  --ok: #35c98a;
  --ok-soft: #14301f;
  --err: #ff6b63;
  --err-soft: #33191a;
  --warn: #e8a93a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px -16px rgba(0, 0, 0, .6);
  --shadow-lift: 0 2px 6px rgba(0, 0, 0, .35), 0 18px 40px -20px rgba(0, 0, 0, .7);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

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

body {
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}

button, input, select { font-family: inherit; font-size: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }

.app {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  padding: 14px 16px calc(28px + env(safe-area-inset-bottom));
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 2px 16px;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.2px;
  margin: 0;
}

.brand-sub {
  margin: 3px 0 0;
  font-size: 12.5px;
  color: var(--text-3);
  letter-spacing: .2px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text-2);
  box-shadow: var(--shadow);
  transition: transform .15s ease, color .15s ease;
}
.icon-btn:active { transform: scale(.94); }
.icon-btn svg { width: 18px; height: 18px; }

/* ---------- 通用卡片 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 14px;
}

.card-flat {
  background: var(--card-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 14px;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: .6px;
  margin: 0 0 10px;
  text-transform: uppercase;
}

/* ---------- 进度环 ---------- */
.ring-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
}

.ring {
  position: relative;
  width: 104px;
  height: 104px;
  flex: 0 0 104px;
}
.ring svg { transform: rotate(-90deg); width: 100%; height: 100%; }
.ring .track { stroke: var(--line); }
.ring .bar {
  stroke: var(--primary);
  stroke-linecap: round;
  transition: stroke-dashoffset .7s cubic-bezier(.4, 0, .2, 1);
}
.ring-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
}
.ring-num {
  display: flex;
  align-items: baseline;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.5px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.ring-num small { font-size: 12px; font-weight: 500; color: var(--text-3); }
.ring-cap {
  font-size: 10.5px;
  color: var(--text-3);
  letter-spacing: .5px;
  margin-top: 2px;
}

.ring-side { flex: 1; min-width: 0; }
.ring-side h3 { margin: 0 0 4px; font-size: 15px; font-weight: 650; }
.ring-side p { margin: 0; font-size: 12.5px; color: var(--text-2); }

.mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 14px;
}
.mini {
  background: var(--card-soft);
  border-radius: var(--radius-s);
  padding: 9px 8px;
  text-align: center;
}
.mini b {
  display: block;
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.3px;
}
.mini span { font-size: 11px; color: var(--text-3); }

.today-line {
  margin-top: 12px;
  padding-top: 11px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.today-line b {
  color: var(--text-2);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

/* ---------- 选择器 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 14px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
  transition: all .16s ease;
  font-variant-numeric: tabular-nums;
}
.chip:active { transform: scale(.96); }
.chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px -8px var(--primary);
}

.seg {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 4px;
  padding: 4px;
  background: var(--card-soft);
  border-radius: 12px;
  border: 1px solid var(--line);
}
.seg button {
  padding: 8px 4px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: all .16s ease;
}
.seg button.active {
  background: var(--card);
  color: var(--primary);
  font-weight: 650;
  box-shadow: 0 1px 4px rgba(22, 32, 47, .1);
}

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 13px 18px;
  border-radius: 13px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .14s ease, background-color .16s ease, opacity .16s ease;
  user-select: none;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .45; pointer-events: none; }
.btn svg { width: 17px; height: 17px; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 24px -12px var(--primary-deep);
}
.btn-primary:hover { background: var(--primary-deep); }

.btn-ghost {
  background: var(--card);
  border-color: var(--line);
  color: var(--text-2);
}
.btn-ghost:hover { border-color: var(--text-3); }

.btn-soft {
  background: var(--primary-soft);
  color: var(--primary);
}

.btn-block { width: 100%; }
.btn-lg { padding: 15px 18px; font-size: 15.5px; border-radius: 14px; }
.btn-sm { padding: 8px 12px; font-size: 13px; border-radius: 10px; }

.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }

/* ---------- 练习页 ---------- */
.quiz-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.quiz-top .icon-btn { width: 34px; height: 34px; flex-basis: 34px; border-radius: 10px; }

.progress-line {
  flex: 1;
  height: 7px;
  border-radius: 99px;
  background: var(--line);
  overflow: hidden;
}
.progress-line i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--primary), #6f9bff);
  transition: width .35s cubic-bezier(.4, 0, .2, 1);
}
.quiz-counter {
  font-size: 13px;
  font-weight: 650;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
  min-width: 44px;
  text-align: right;
}

.quiz-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-lift);
  padding: 24px 20px;
  margin-bottom: 14px;
}

.quiz-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .4px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
}
.tag.gray { background: var(--card-soft); color: var(--text-3); }

.quiz-ask {
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 8px;
}

.quiz-word {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -.4px;
  line-height: 1.25;
  word-break: break-word;
}

.quiz-meaning {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.5;
  letter-spacing: -.1px;
  word-break: break-word;
}
.quiz-meaning .pos {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-right: 6px;
  vertical-align: 2px;
}

.quiz-hint {
  margin-top: 12px;
  font-size: 15px;
  letter-spacing: 6px;
  color: var(--text-3);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  min-height: 22px;
}

/* 输入框 */
.input-wrap { position: relative; }
.answer-input {
  width: 100%;
  padding: 15px 16px;
  border-radius: 13px;
  border: 1.5px solid var(--line);
  background: var(--card-soft);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .3px;
  outline: none;
  transition: border-color .18s ease, background-color .18s ease;
}
.answer-input::placeholder { color: var(--text-3); font-weight: 400; font-size: 15px; letter-spacing: 0; }
.answer-input:focus {
  border-color: var(--primary);
  background: var(--card);
  box-shadow: 0 0 0 4px var(--primary-soft);
}
.answer-input.ok { border-color: var(--ok); box-shadow: 0 0 0 4px var(--ok-soft); }
.answer-input.err { border-color: var(--err); box-shadow: 0 0 0 4px var(--err-soft); }
.answer-input:disabled { opacity: 1; -webkit-text-fill-color: var(--text); }

/* 选项 */
.options { display: grid; gap: 9px; }
.option {
  text-align: left;
  padding: 14px 16px;
  border-radius: 13px;
  border: 1.5px solid var(--line);
  background: var(--card-soft);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--text);
  transition: all .15s ease;
}
.option:active { transform: scale(.99); }
.option.correct {
  border-color: var(--ok);
  background: var(--ok-soft);
  color: var(--ok);
  font-weight: 600;
}
.option.wrong {
  border-color: var(--err);
  background: var(--err-soft);
  color: var(--err);
}
.option:disabled { cursor: default; }

/* 反馈 */
.feedback {
  margin-top: 16px;
  border-radius: var(--radius-m);
  padding: 14px 16px;
  animation: pop .22s ease;
}
.feedback.ok { background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 30%, transparent); }
.feedback.err { background: var(--err-soft); border: 1px solid color-mix(in srgb, var(--err) 30%, transparent); }

.fb-head {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feedback.ok .fb-head { color: var(--ok); }
.feedback.err .fb-head { color: var(--err); }
.fb-head svg { width: 16px; height: 16px; }

.fb-answer {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}
.fb-word {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.3px;
  color: var(--text);
}
.fb-phon {
  font-size: 13.5px;
  color: var(--text-2);
  letter-spacing: .2px;
}
.fb-mean {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.55;
}
.fb-you {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.fb-you .bad {
  color: var(--err);
  font-weight: 600;
  text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--err) 50%, transparent);
}
.fb-you .good { color: var(--ok); font-weight: 600; }

.speak-btn {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text-2);
  vertical-align: middle;
}
.speak-btn svg { width: 15px; height: 15px; }

/* ---------- 结果页 ---------- */
.hero {
  text-align: center;
  padding: 26px 18px 20px;
}
.hero-score {
  position: relative;
  width: 148px;
  height: 148px;
  margin: 0 auto 12px;
}
.hero-score svg { transform: rotate(-90deg); }
.hero-score .num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -1.5px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.hero-score .num small { font-size: 15px; font-weight: 600; margin-left: 1px; }
.hero-title { font-size: 19px; font-weight: 700; margin: 0 0 4px; letter-spacing: -.2px; }
.hero-desc { font-size: 13px; color: var(--text-2); margin: 0; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
}
.stat-cell {
  background: var(--card-soft);
  border-radius: var(--radius-m);
  padding: 12px 14px;
}
.stat-cell b {
  display: block;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.4px;
  font-variant-numeric: tabular-nums;
}
.stat-cell span { font-size: 11.5px; color: var(--text-3); }

/* 词条列表 */
.word-list { list-style: none; margin: 0; padding: 0; }
.word-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.word-list li:last-child { border-bottom: none; }
.wl-main { flex: 1; min-width: 0; }
.wl-w {
  font-size: 15.5px;
  font-weight: 650;
  letter-spacing: -.2px;
  display: flex;
  align-items: baseline;
  gap: 7px;
  flex-wrap: wrap;
}
.wl-w em {
  font-style: normal;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-3);
  letter-spacing: .2px;
}
.wl-m { font-size: 12.5px; color: var(--text-2); margin-top: 2px; line-height: 1.5; }
.wl-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--err-soft);
  color: var(--err);
  white-space: nowrap;
  margin-top: 2px;
}

.empty {
  text-align: center;
  padding: 30px 10px;
  color: var(--text-3);
  font-size: 13px;
}

/* 近 7 日柱状 */
.bars {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  align-items: end;
  height: 92px;
  padding-top: 6px;
}
.bar-col { display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.bar-col i {
  display: block;
  width: 100%;
  max-width: 26px;
  border-radius: 6px 6px 3px 3px;
  background: linear-gradient(180deg, #7aa2ff, var(--primary));
  min-height: 3px;
  transition: height .5s cubic-bezier(.4, 0, .2, 1);
}
.bar-col b { font-size: 10.5px; color: var(--text-3); font-weight: 500; }
.bar-col span { font-size: 10px; color: var(--text-3); }

/* 提示条 */
.notice {
  display: flex;
  gap: 9px;
  padding: 11px 13px;
  border-radius: var(--radius-s);
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12.5px;
  line-height: 1.55;
  margin-bottom: 12px;
}
.notice svg { width: 15px; height: 15px; flex: 0 0 15px; margin-top: 1px; }

/* 底部 */
.foot-note {
  text-align: center;
  font-size: 11.5px;
  color: var(--text-3);
  padding: 6px 0 0;
  line-height: 1.7;
}

/* 视图切换 */
.view { display: none; }
.view.active { display: block; animation: fade .24s ease; }

/* 练习页：撑满屏幕，题目居中，按钮贴近底部 */
#view-quiz.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  animation: fade .24s ease;
}
#view-quiz .quiz-card {
  min-height: 268px;
  display: flex;
  flex-direction: column;
  margin: auto 0;
}
.quiz-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 140px;
}
#feedbackArea:empty { display: none; }

@keyframes fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
@keyframes pop {
  from { opacity: 0; transform: scale(.97); }
  to { opacity: 1; transform: none; }
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 12px);
  background: rgba(22, 32, 47, .92);
  color: #fff;
  font-size: 13px;
  padding: 10px 16px;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transition: all .24s ease;
  z-index: 90;
  max-width: 80vw;
  text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 启动占位 ---------- */
.boot {
  min-height: 62vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--text-3);
  font-size: 13px;
}
.spinner {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2.5px solid var(--line);
  border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 登录页 ---------- */
.login-hero {
  text-align: center;
  padding: 34px 0 20px;
}
.login-mark {
  width: 62px;
  height: 62px;
  margin: 0 auto 14px;
  border-radius: 20px;
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
}
.login-mark svg { width: 30px; height: 30px; }
.login-title {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.3px;
  margin: 0 0 6px;
}
.login-sub {
  font-size: 13px;
  color: var(--text-3);
  margin: 0;
}

.field-label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 7px;
}

.login-err {
  min-height: 18px;
  margin: 10px 0 4px;
  font-size: 12.5px;
  color: var(--err);
}

/* ---------- 首页账号入口 ---------- */
.user-bar {
  display: flex;
  justify-content: flex-end;
  margin: -4px 0 8px;
}
.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 9px 5px 7px;
  border-radius: 9px;
  background: var(--card-soft);
  border: 1px solid var(--line);
  color: var(--text-2);
  font-size: 12.5px;
  font-weight: 500;
  max-width: 100%;
  transition: border-color .16s ease, color .16s ease;
}
.user-chip:active { transform: scale(.97); }
.user-chip:hover { border-color: var(--text-3); }
.user-chip svg { width: 14px; height: 14px; flex: 0 0 14px; color: var(--text-3); }
.user-chip .chev { width: 12px; height: 12px; flex-basis: 12px; }
.user-chip span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 130px;
}

/* ---------- 底部账号面板 ---------- */
.sheet-mask {
  position: fixed;
  inset: 0;
  background: rgba(12, 18, 28, .42);
  backdrop-filter: blur(2px);
  z-index: 80;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fadeIn .18s ease;
}
.sheet-mask[hidden] { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.sheet {
  width: 100%;
  max-width: 520px;
  background: var(--card);
  border-radius: 20px 20px 0 0;
  padding: 10px 18px calc(22px + env(safe-area-inset-bottom));
  box-shadow: 0 -12px 40px -20px rgba(12, 18, 28, .5);
  animation: slideUp .24s cubic-bezier(.32, .72, .3, 1);
}
@keyframes slideUp { from { transform: translateY(18px); opacity: .6; } to { transform: none; opacity: 1; } }

.sheet-grip {
  width: 38px;
  height: 4px;
  border-radius: 99px;
  background: var(--line);
  margin: 0 auto 14px;
}
.sheet-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: .5px;
  margin-bottom: 12px;
}
.sheet-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-m);
  background: var(--card-soft);
  margin-bottom: 16px;
}
.sheet-avatar {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}
.sheet-user-main { min-width: 0; }
.sheet-name {
  font-size: 15px;
  font-weight: 650;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sheet-sid {
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.sheet-tip {
  margin: 10px 0 0;
  font-size: 11.5px;
  color: var(--text-3);
  text-align: center;
  line-height: 1.6;
}

/* ---------- 移动端微调 ---------- */
@media (max-width: 380px) {
  .app { padding-left: 13px; padding-right: 13px; }
  .quiz-word { font-size: 26px; }
  .quiz-meaning { font-size: 18px; }
  .ring { width: 92px; height: 92px; flex-basis: 92px; }
  .ring-num { font-size: 21px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}