/* 首页专用样式，不影响栏目列表与文章页。 */
.home-hero { padding-bottom: 2rem; overflow: visible; isolation: isolate; }
.home-hero::before { inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero-actions { display: flex; justify-content: center; align-items: flex-start; flex-wrap: wrap; gap: .75rem; margin: 2rem auto 0; }
.reading-picker { position: relative; max-width: 100%; margin: 0; z-index: 2; }
.hero-submit { display: flex; align-items: center; justify-content: center; gap: .6rem; min-height: 44px; padding: .5rem 1.2rem; font-size: .95rem; }
.hero-submit:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }
.reading-start { display: flex; align-items: center; justify-content: center; gap: 1rem; min-height: 44px; padding: .5rem 1.5rem; font-size: .95rem; cursor: pointer; list-style: none; }
/* 开始阅读：沿用原来的青蓝渐变（加深一档），透明色层保留玻璃的透光感。 */
.home-hero .reading-start.glass-button {
  color: #fff;
  background-color: transparent;
  background-image: linear-gradient(180deg, rgba(255, 255, 255, .2), rgba(255, 255, 255, 0)), linear-gradient(135deg, rgba(21, 101, 132, .9), rgba(9, 48, 117, .9));
}
.reading-start::-webkit-details-marker { display: none; }
.reading-start svg { width: 1rem; height: 1rem; transition: transform .2s; }
.reading-picker[open] .reading-start svg { transform: rotate(180deg); }
.reading-options { position: absolute; top: 100%; left: 0; width: max(100%, 210px); max-width: calc(100vw - 40px); padding: .3rem; margin-top: .5rem; display: flex; flex-direction: column; gap: 0; border: 1px solid var(--color-border); border-radius: 1rem; background: var(--color-surface); box-shadow: 0 16px 48px var(--color-shadow); text-align: left; }
/* 连接按钮与浮层的悬停区域，鼠标移向栏目时不会意外收起。 */
.reading-options::before { content: ''; position: absolute; bottom: 100%; left: 0; right: 0; height: .7rem; }
.reading-option { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 44px; padding: .5rem .75rem; border-radius: .65rem; color: var(--color-text); text-decoration: none; font-size: .95rem; transition: background .12s ease, color .12s ease, padding-left .15s cubic-bezier(.4,0,.2,1); }
/* hover：高亮滑入（左内边距外推）+ 箭头向右上漂出，替代干巴巴的变色 */
.reading-option:hover, .reading-option:focus-visible { background: var(--color-accent-light); color: var(--color-accent); padding-left: 1rem; }
.reading-option > span:last-child { color: var(--color-text-muted); font-family: var(--font-sans); transition: transform .15s cubic-bezier(.4,0,.2,1), color .12s ease; }
.reading-option:hover > span:last-child, .reading-option:focus-visible > span:last-child { transform: translate(3px, -3px); color: var(--color-accent); }
.reading-option:active { transform: scale(.985); }
.reading-start:focus-visible, .reading-option:focus-visible, .recent-article:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }
.home-recent { padding: 2.5rem 0 5rem; }
.recent-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--color-border); }
.recent-eyebrow { margin: 0 0 .3rem; font: .65rem var(--font-sans); letter-spacing: .22em; color: var(--color-accent); }
.recent-heading h2 { margin: 0; font-size: 1.65rem; font-weight: 500; }
.home-columns { display: grid; grid-template-columns: minmax(0, 1fr) 230px; align-items: start; gap: 2.5rem; }
/* 有专栏时三栏：专栏 | 最近更新 | 统计，两张侧卡等宽 */
.home-columns.has-collections { grid-template-columns: 230px minmax(0, 1fr) 230px; }
.home-columns.has-collections .collections-card { grid-column: 1; }
.home-columns.has-collections .recent-main { grid-column: 2; }
.home-columns.has-collections .article-stats { grid-column: 3; }
.recent-main { min-width: 0; }
/* 专栏窗口：比统计卡更醒目——主题色渐变卡头 + 专栏名高亮 */
.collections-card { padding: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: 0 8px 28px var(--color-shadow); overflow: hidden; }
.collections-card > h2 {
  margin: 0; padding: .8rem 1.25rem; font-size: 1.4rem; font-weight: 500; color: #fff;
  background-image: linear-gradient(135deg, rgba(21, 101, 132, .92), rgba(9, 48, 117, .92));
  display: flex; align-items: center; gap: .5rem;
}
.collections-card > h2 svg { width: 1.3rem; height: 1.3rem; flex: none; }
.collections-card .stats-sections { margin: .4rem .75rem .6rem; }
/* 专栏条目：名称+描述两行，计数顶部对齐；hover 交互复用统计卡样式 */
.collections-link { align-items: flex-start; padding-block: .6rem; }
.collections-link-main { display: flex; flex-direction: column; gap: .25rem; min-width: 0; }
.collections-link-name { color: var(--color-text); font-size: 1.15rem; font-weight: 600; font-family: var(--font-serif); line-height: 1.4; }
.collections-link:hover .collections-link-name { color: var(--color-accent); }
.collections-link-desc { color: var(--color-text-muted); font-size: .75rem; line-height: 1.55; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; overflow-wrap: anywhere; }
.article-stats { padding: 1.5rem; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: 0 8px 28px var(--color-shadow); }
.article-stats h2 { margin: 0; font-size: 1rem; font-weight: 500; }
.stats-total { display: flex; flex-direction: column; gap: .25rem; margin: 1.25rem 0; color: var(--color-text-muted); font-size: .8rem; }
.stats-total strong { color: var(--color-accent); font: 500 2.5rem/1.2 var(--font-sans); font-variant-numeric: tabular-nums; }
.stats-sections { list-style: none; margin: 0; padding: .5rem 0 0; border-top: 1px solid var(--color-border); }
.stats-section-link { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 44px; padding: .5rem .5rem; border-radius: .5rem; font-size: .9rem; color: var(--color-text-muted); text-decoration: none; transition: background .12s ease, color .12s ease, padding-left .15s cubic-bezier(.4,0,.2,1); }
.stats-section-link:hover { background: var(--color-accent-light); color: var(--color-accent); padding-left: .8rem; }
.stats-section-link:active { transform: scale(.985); }
.stats-section-link:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.stats-section-count { font-family: var(--font-sans); font-variant-numeric: tabular-nums; transition: color .12s ease; }
.stats-section-link:hover .stats-section-count { color: var(--color-accent); }
.recent-list { list-style: none; margin: 0; padding: 0; }
.recent-list > li { border-bottom: 1px solid var(--color-border); }
.recent-article { display: block; padding: 1.6rem 1.25rem; color: var(--color-text); text-decoration: none; border-radius: .75rem; transition: background .2s; overflow-wrap: anywhere; }
.recent-article:hover { background: var(--color-surface); }
.recent-article-top, .recent-article-bottom { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.recent-article-top { font-family: var(--font-sans); font-size: .75rem; color: var(--color-text-muted); }
.recent-section { color: var(--color-accent); }
.recent-article h3 { font-size: 1.3rem; line-height: 1.6; font-weight: 500; margin: .5rem 0; }
.recent-article:hover h3 { color: var(--color-accent); }
.recent-excerpt { color: var(--color-text-muted); margin: 0 0 .75rem; font-size: .9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.recent-byline { display: flex; flex-wrap: wrap; gap: 1rem; font-size: .8rem; color: var(--color-text-muted); }
.recent-read { color: var(--color-accent); transition: transform .2s; }
.recent-article:hover .recent-read { transform: translateX(4px); }
/* ≤1100 三栏过挤：降为单列堆叠，统计横条与专栏卡依次提到最近更新上方 */
@media (max-width: 1100px) {
  .home-columns, .home-columns.has-collections { grid-template-columns: minmax(0, 1fr); }
  .home-columns.has-collections .article-stats { grid-column: 1; grid-row: 1; }
  .home-columns.has-collections .collections-card { grid-column: 1; grid-row: 2; }
  .home-columns.has-collections .recent-main { grid-column: 1; grid-row: 3; }
}
@media (max-width: 760px) {
  .home-columns { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  /* 小屏单列：统计横条与专栏卡依次提到最近更新上方 */
  .article-stats { display: flex; align-items: center; gap: .5rem; min-width: 0; padding: .75rem .5rem; }
  .home-columns.has-collections { grid-template-columns: minmax(0, 1fr); }
  .home-columns.has-collections .collections-card { grid-column: 1; grid-row: 2; }
  .home-columns.has-collections .recent-main { grid-column: 1; grid-row: 3; }
  .home-columns.has-collections .article-stats { grid-column: 1; grid-row: 1; }
  .article-stats h2 { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .stats-total { flex: 0 0 5rem; margin: 0; text-align: center; font-size: .65rem; }
  .stats-total strong { font-size: 1.6rem; }
  .stats-sections { flex: 1; min-width: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); padding: 0 0 0 .5rem; border-top: 0; border-left: 1px solid var(--color-border); }
  .stats-section-link { flex-direction: column; justify-content: center; gap: .2rem; height: 100%; padding: .3rem .1rem; font-size: .75rem; text-align: center; overflow-wrap: anywhere; }
  .stats-section-count { font-size: 1rem; color: var(--color-text); }
  /* 窄格横条内禁用 hover 左滑，避免文字挤压跳动 */
  .stats-section-link:hover { padding-left: .1rem; }
}
@media (max-width: 640px) {
  .home-hero { padding: 3rem 0 2rem; }
  .home-recent { padding: 2rem 0 3rem; }
  .hero-actions { gap: .6rem; }
  .reading-start { padding-inline: 1.2rem; gap: .7rem; }
  .hero-submit { padding-inline: 1.1rem; }
  .recent-article { padding: 1.3rem 1.25rem; }
  .recent-article h3 { font-size: 1.15rem; }
}
@media (prefers-reduced-motion: reduce) {
  .reading-start, .reading-start svg, .recent-article, .recent-read, .reading-option, .reading-option > span:last-child, .stats-section-link, .stats-section-count { transition: none; }
}