/* ============================================
   文章页的阅读版式
   只管正文排版，颜色圆角一律用 style.css 里的变量
   ============================================ */

.post-head { padding: 30px 0 0; max-width: 42rem; }
.post-kicker { font-size: 12.5px; letter-spacing: .08em; color: var(--brand); margin: 0 0 12px; }
.post-head h1 {
  font-size: clamp(27px, 4.2vw, 40px); line-height: 1.28;
  margin: 0 0 16px; letter-spacing: -.025em;
}
.post-lead { color: var(--text-2); font-size: 16.5px; line-height: 1.85; margin: 0 0 18px; }
.post-meta { font-size: 12.5px; color: var(--text-3); display: flex; gap: 14px; flex-wrap: wrap; }

.post-body { max-width: 42rem; margin: 44px 0 0; }
.post-body h2 {
  font-size: 21px; margin: 52px 0 14px; letter-spacing: -.015em;
  padding-top: 6px;
}
.post-body h3 { font-size: 16.5px; margin: 34px 0 10px; }
.post-body p { font-size: 15.5px; line-height: 1.95; color: var(--text); margin: 0 0 18px; }
.post-body ul, .post-body ol { margin: 0 0 20px; padding-left: 22px; }
.post-body li { font-size: 15.5px; line-height: 1.9; color: var(--text); margin-bottom: 9px; }
.post-body strong { font-weight: 600; }
.post-body a { color: var(--brand); text-underline-offset: 3px; }

.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .88em; padding: 1.5px 5px; border-radius: 4px;
  background: var(--bg-soft); border: 1px solid var(--border-light);
}
.post-body pre {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 15px 16px; overflow-x: auto; margin: 0 0 20px;
}
.post-body pre code { background: none; border: 0; padding: 0; font-size: 12.5px; line-height: 1.75; color: var(--text-2); }

/* 引一句话出来单独站着，用在每节的结论上 */
.post-body blockquote {
  margin: 26px 0; padding: 2px 0 2px 20px;
  border-left: 2px solid var(--brand);
}
.post-body blockquote p { font-size: 16px; color: var(--text); margin: 0; line-height: 1.85; }

/* 诚实边界：凡是我在外推而不是引规范的地方，都套这个 */
.post-caveat {
  border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 15px 17px; margin: 26px 0; background: var(--bg-soft);
}
.post-caveat p { font-size: 14px; line-height: 1.85; color: var(--text-2); margin: 0; }
.post-caveat p + p { margin-top: 10px; }
.post-caveat b { color: var(--text); font-weight: 600; }

/* 数据表 */
.post-table-wrap { overflow-x: auto; margin: 0 0 22px; }
.post-body table { width: 100%; border-collapse: collapse; min-width: 480px; }
.post-body th, .post-body td {
  text-align: left; padding: 10px 13px; font-size: 13.5px;
  border-bottom: 1px solid var(--border-light);
}
.post-body th { color: var(--text-3); font-weight: 500; font-size: 12.5px; }
.post-body td { color: var(--text-2); }
.post-body td:first-child { color: var(--text); }
.post-body td.num {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

/* 图注 */
.post-fig { margin: 0 0 24px; }
.post-fig figcaption { font-size: 12.5px; color: var(--text-3); line-height: 1.7; margin-top: 10px; }

/* 文末去处 */
.post-next {
  max-width: 42rem; margin: 60px 0 0; padding-top: 26px;
  border-top: 1px solid var(--border);
}
.post-next h3 { font-size: 14px; color: var(--text-3); font-weight: 500; margin: 0 0 14px; }
.post-next a {
  display: block; padding: 14px 16px; border: 1px solid var(--border);
  border-radius: var(--radius); text-decoration: none; color: inherit; margin-bottom: 10px;
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}
.post-next a:hover { border-color: var(--brand); transform: translateY(-2px); }
.post-next b { display: block; font-size: 14.5px; font-weight: 500; margin-bottom: 4px; }
.post-next span { font-size: 13px; color: var(--text-2); line-height: 1.65; }

/* —— 文章里的活演示：共用外框 —— */
.demo {
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--bg); box-shadow: var(--shadow-card);
  padding: 20px; margin: 0 0 22px;
}
.demo-title { font-size: 12.5px; letter-spacing: .06em; color: var(--text-3); margin: 0 0 16px; }
.demo-ctl { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.demo-ctl label { font-size: 13px; color: var(--text-2); display: flex; align-items: center; gap: 9px; }
.demo-ctl input[type="range"] { width: 190px; accent-color: var(--brand); }
.demo-ctl output {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px; color: var(--text); min-width: 4.5em;
}
.demo-toggle {
  font-size: 12.5px; padding: 5px 11px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text-2); cursor: pointer;
}
.demo-toggle[aria-pressed="true"] { border-color: var(--brand); color: var(--brand); }

.demo-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 620px) { .demo-pair { grid-template-columns: 1fr; } }
.demo-cell { border-radius: var(--radius); padding: 18px 16px; border: 1px solid var(--border); }
.demo-cell .dc-cn { font-size: 15px; line-height: 1.8; margin: 0 0 6px; }
.demo-cell .dc-en { font-size: 14px; line-height: 1.7; margin: 0 0 14px; }
.demo-cell .dc-sm { font-size: 12px; line-height: 1.6; margin: 0; }
.demo-nums { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 14px; }
.demo-num {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px; padding: 2.5px 8px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-2);
}
.demo-num b { font-weight: 600; color: var(--text); }
.demo-foot { font-size: 12.5px; color: var(--text-3); line-height: 1.75; margin: 16px 0 0; }

/* 中文/拉丁对照那个演示 */
.demo-sizes { display: grid; gap: 16px; }
.demo-size-row { display: grid; grid-template-columns: 46px 1fr 1fr; gap: 14px; align-items: baseline; }
@media (max-width: 620px) { .demo-size-row { grid-template-columns: 40px 1fr; } .demo-size-row .ds-en { grid-column: 2; } }
.ds-tag { font-size: 11.5px; color: var(--text-3); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.demo-blur { transition: filter .2s var(--ease); }
.demo-blur.on { filter: blur(.6px); }