.idiom-page {
  --idiom-paper: #fffefa;
  --idiom-green: #205640;
  --idiom-line: #d9e6da;
  --idiom-warm: #fff4e1;
  --idiom-orange: #854521;
  --idiom-shadow: 0 3px 12px rgb(34 75 49 / 5%);
  margin-inline: auto;
  overflow-wrap: anywhere;
}

.idiom-page :is(h1, h2, h3, p, ul, dl, dd) { margin: 0; }
.idiom-page ul { list-style: none; padding: 0; }
.idiom-page h1 { font-size: clamp(1.9rem, 3.5vw, 2.8rem); line-height: 1.13; color: var(--idiom-green); }
.idiom-page h2 { font-size: clamp(1.25rem, 2vw, 1.7rem); line-height: 1.3; color: var(--idiom-green); }

.idiom-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-block: .65rem;
  color: var(--muted);
  font-size: .86rem;
}
.idiom-crumbs a, .idiom-source a { color: var(--idiom-green); text-decoration: underline; text-underline-offset: .18em; }
.idiom-text-link { color: var(--idiom-green); font-weight: 650; text-underline-offset: .18em; }
.idiom-text-link:hover { text-decoration: underline; }

.idiom-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2.5rem;
  padding: clamp(1rem, 2vw, 1.6rem);
  background:
    radial-gradient(ellipse at 15% 0%, #faf6dd, transparent 65%),
    linear-gradient(110deg, #edf4e4, #e5f1e9);
  border: 1px solid #d5e5d7;
  border-radius: 22px;
}
.idiom-hero-copy { display: flex; align-items: center; gap: .85rem; }
.idiom-hero-icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: clamp(50px, 6vw, 76px);
  aspect-ratio: 1;
  border: 1px solid #ead9ac;
  border-radius: 20px;
  background: #fff4d4;
  box-shadow: 0 3px 0 rgb(166 118 45 / 12%);
}
.idiom-hero-icon img { width: 75%; height: auto; }
.idiom-hero-copy p:last-child { margin-top: .25rem; color: var(--muted); }
.idiom-page .eyebrow, .idiom-kicker { margin-bottom: .2rem; color: var(--idiom-orange); font-size: .79rem; font-weight: 750; letter-spacing: .05em; }

.idiom-search { flex: 0 1 22rem; min-width: 0; }
.idiom-search label { display: block; margin-bottom: .22rem; color: var(--idiom-green); font-size: .88rem; font-weight: 700; }
.idiom-search-field {
  display: flex;
  align-items: stretch;
  gap: .25rem;
  padding: .2rem;
  background: var(--idiom-paper);
  border: 1px solid #a5bfae;
  border-radius: 14px;
}
.idiom-search-field:focus-within { border-color: var(--idiom-green); }
.idiom-search input { flex: 1; min-width: 0; padding: .45rem .55rem; color: var(--ink); background: transparent; border: 0; border-radius: 9px; }
.idiom-search button { flex: 0 0 auto; padding: .4rem .75rem; min-height: 42px; border-radius: 10px; box-shadow: none; font-size: .9rem; }

.idiom-search-results { padding: 0 0 1.25rem; border-bottom: 1px solid var(--idiom-line); }
.idiom-section-heading, .idiom-card-toolbar {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .25rem .8rem;
}
.idiom-section-heading { margin-block: 1.3rem .75rem; }
.idiom-section-heading p, .idiom-meta { color: var(--muted); }
/* 宽屏自适应：按可用宽度自动增减列数，窄屏自动回落到单列。 */
.idiom-result-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); gap: .9rem; }
.idiom-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: 1.3rem; }
.idiom-result-list a {
  display: flex;
  justify-content: space-between;
  gap: .35rem;
  padding: .55rem .8rem;
  border-radius: 12px;
  color: var(--idiom-green);
  background: var(--idiom-paper);
  border: 1px solid var(--idiom-line);
  font-weight: 700;
}
.idiom-result-list a:hover, .idiom-scene-nav a:hover { background: #edf5eb; }
.idiom-pagination { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: .75rem; margin-top: 1rem; }
.idiom-pagination a { text-decoration: underline; color: var(--idiom-green); }

.idiom-workspace, .idiom-entry-layout { display: grid; gap: 1rem; align-items: start; margin-top: 1rem; }
.idiom-workspace { grid-template-columns: minmax(10rem, 12rem) minmax(0, 1fr); }
.idiom-entry-layout { grid-template-columns: minmax(0, 3fr) minmax(12rem, 1fr); }
.idiom-reader, .idiom-scene-nav, .idiom-situation {
  min-width: 0;
  background: var(--idiom-paper);
  border: 1px solid var(--idiom-line);
  border-radius: 18px;
  box-shadow: var(--idiom-shadow);
}

.idiom-scene-nav { padding: .9rem .85rem; }
.idiom-workspace .idiom-scene-nav { position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow-y: auto; scrollbar-width: thin; }
.idiom-nav-title { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .3rem; margin-bottom: .55rem; }
.idiom-scene-nav h2 { font-size: 1.05rem; }
.idiom-nav-title span, .idiom-card-toolbar .idiom-meta { padding: .05rem .5rem; border-radius: 999px; background: #eaf2e9; color: #385a4b; font-size: .78rem; }
.idiom-nav-group { --group-dot: #cc7c43; }
.idiom-nav-group[data-group="study"] { --group-dot: #6084ae; }
.idiom-nav-group[data-group="together"] { --group-dot: #9b7295; }
.idiom-nav-group[data-group="expression"] { --group-dot: #af8637; }
.idiom-nav-group[data-group="world"] { --group-dot: #588b65; }
.idiom-nav-group[data-group="action"] { --group-dot: #b76864; }
.idiom-nav-group + .idiom-nav-group { margin-top: .55rem; padding-top: .55rem; border-top: 1px solid #e7ede5; }
.idiom-nav-group h3 { display: flex; align-items: center; gap: .4rem; padding-inline: .35rem; margin-bottom: .15rem; color: var(--muted); font-size: .76rem; font-weight: 750; }
.idiom-nav-group h3::before { content: ""; flex: 0 0 .42rem; aspect-ratio: 1; border-radius: 50%; background: var(--group-dot); }
.idiom-scene-nav a { display: flex; justify-content: space-between; gap: .3rem; align-items: baseline; padding: .24rem .5rem; border-radius: 8px; color: var(--idiom-green); font-size: .84rem; }
.idiom-scene-nav [aria-current] { background: #dfeee1; font-weight: 750; }
.idiom-scene-nav [aria-current] span { flex: none; font-size: .78rem; }

.idiom-situation {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: center;
  gap: .6rem 1.25rem;
  padding: .85rem 1.15rem;
  background: #fffdf5;
  border-color: #eae2c8;
}
.idiom-situation h2 + p { margin-top: .15rem; color: var(--muted); }
.idiom-prompt { padding: .35rem .65rem; border-inline-start: 3px solid #d9a762; border-radius: 0 10px 10px 0; background: var(--idiom-warm); }
.idiom-prompt strong { color: var(--idiom-orange); font-size: .82rem; }
.idiom-prompt p { font-size: .94rem; line-height: 1.55; }
.idiom-return-nav { display: none; }
.idiom-card-toolbar { margin-block: .95rem .5rem; }
.idiom-card-toolbar strong { color: var(--idiom-green); }

.idiom-cards .idiom-reader { display: flex; flex-direction: column; }
.idiom-card-heading {
  display: flex;
  align-items: center;
  gap: .85rem;
  padding: .85rem 1rem .8rem;
  border-radius: 17px 17px 0 0;
  border-bottom: 1px solid #e2ece0;
  background: linear-gradient(115deg, #eaf3e7, #f2f7ed);
}
/* 印章首字：参照 primary 成语本的红印编排。 */
.idiom-seal {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 3.2rem;
  height: 3.2rem;
  border-radius: 10px;
  background: #d0483c;
  color: #fff;
  font-family: "Kaiti SC", "STKaiti", "KaiTi", "SimKai", serif;
  font-size: 2.1rem;
  line-height: 1;
  box-shadow: inset 0 0 0 3px rgb(255 255 255 / 40%), 0 3px 8px rgb(208 72 60 / 30%);
}
.idiom-card-title { flex: 1; min-width: 0; }
.idiom-card-number {
  display: inline-block;
  margin-bottom: .1rem;
  color: #8fae9b;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
  font-variant-numeric: tabular-nums;
}
.idiom-card-heading h3 { letter-spacing: .12em; line-height: 1.2; }
.idiom-cards .idiom-card-heading h3 { font-size: clamp(1.55rem, 2.2vw, 2rem); }
.idiom-card-heading .say-chip { flex: 0 0 auto; }
/* 朗读按钮：成语系列通用浅紫药丸。 */
.say-chip { flex-shrink: 0; padding: 4px 13px; border: 1.5px solid #ddd3ef; border-radius: 999px; background: #f4edfd; color: #5d5484; font-size: 15px; font-weight: 700; cursor: pointer; transition: border-color .14s ease; }
.say-chip:hover { border-color: #b9a8e2; }
.idiom-reader :is(h2, h3) { font-size: clamp(1.38rem, 2vw, 1.8rem); line-height: 1.3; color: var(--idiom-green); }
.idiom-pinyin { display: flex; flex-wrap: wrap; align-items: baseline; gap: .18rem .45rem; margin-top: .15rem; color: #7c76a8; font-size: 1.12rem; font-weight: 700; }
.idiom-pinyin small { color: var(--muted); font-size: .75rem; font-weight: 600; }
/* 卡片标题区只留词语与拼音，来源小标注详情页再看。 */
.idiom-card-heading .idiom-pinyin small { display: none; }
.idiom-card-body { display: flex; flex: 1; flex-direction: column; gap: 1.05rem; padding: 1rem 1.15rem 1.05rem; }
.idiom-reader dt { color: var(--idiom-green); font-weight: 750; font-size: .88rem; }
.idiom-reader dl div + div { margin-top: .55rem; }
.idiom-practice {
  padding: .6rem .75rem;
  border-inline-start: 3px solid #e0a864;
  border-radius: 0 10px 10px 0;
  background: var(--idiom-warm);
}
.idiom-practice dt { color: var(--idiom-orange); }
.idiom-practice div:first-child dd { font-size: 1.12rem; font-weight: 650; line-height: 1.7; }
.idiom-practice div + div dd { color: #5e4a36; font-size: .95rem; line-height: 1.7; }
.idiom-definition dd { line-height: 1.75; }

.idiom-card-footer { margin-top: auto; padding-top: .55rem; border-top: 1px solid #e6ece4; font-size: .85rem; }
.idiom-card-footer > a { display: inline-block; margin-top: .25rem; }
.idiom-extras summary { color: #3d604e; cursor: pointer; }
.idiom-extras[open] .idiom-definition { margin-top: .4rem; }
.idiom-paused { color: var(--idiom-orange); font-weight: 700; }
.idiom-reader:target { border-color: #729f7e; box-shadow: 0 0 0 2px #d5e7d9; }
.idiom-entry-layout .idiom-reader { padding: 1.1rem 1.3rem; }
.idiom-entry-layout .idiom-reader + .idiom-reader { margin-top: 1rem; }
.idiom-entry-layout .idiom-definition { margin-top: .75rem; }
/* 宽屏下限制释义行宽，长句更易读。 */
.idiom-entry-layout .idiom-definition dd { max-width: 42em; }
.idiom-source { margin-top: .7rem; padding-top: .55rem; border-top: 1px solid var(--idiom-line); color: var(--muted); font-size: .87rem; }

/* 超宽屏：场景导航加宽，让 24 个场景链接少折行。 */
@media (min-width: 1600px) {
  .idiom-workspace { grid-template-columns: minmax(12rem, 14rem) minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .idiom-workspace, .idiom-entry-layout { grid-template-columns: minmax(0, 1fr); }
  .idiom-workspace .idiom-scene-nav { position: static; max-height: 11rem; }
  .idiom-nav-group ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .idiom-return-nav { display: inline; font-size: .88rem; }
  .idiom-hero-copy { gap: .6rem; }
  .idiom-search { flex-basis: 100%; }
  .idiom-result-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 540px) {
  .idiom-situation { grid-template-columns: minmax(0, 1fr); }
  .idiom-hero-icon { border-radius: 14px; }
}