/* AI 实践页面（附录 A）：卡片补充、日期分组、详情区块、步骤与代码块、热度与时间线。沿用 app.css 的颜色变量与断点（≤ 720px 单栏）。 */
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.practice-card .newness{margin:6px 0 0;color:var(--ink)}
.practice-card .newness b{margin-right:4px;color:var(--brand)}
.clamp3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.practice-top{font-size:13px;color:var(--sub);margin-bottom:4px}
.practice-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:10px;font-size:14px}
.practice-foot .crumbs a{margin-right:8px;color:var(--sub)}
.practice-below{margin-top:10px;border-top:1px dashed var(--line);padding-top:8px}
.evidence-row{display:flex;flex-wrap:wrap;gap:6px 12px;margin-top:8px;font-size:13px;color:var(--sub)}
.evidence-row .ev.ok{color:var(--brand)}
.evidence-row .icon{margin-right:3px}
.badge.demo{border-style:dashed}
.basis-bar{margin:12px 0}
.practice-filters{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips .chip.active{background:var(--brand);color:var(--on);border-color:var(--brand)}
.day-group{margin-top:22px}
.day-head{font-size:16px;color:var(--sub);margin:0 0 10px}
.practice-row{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:start;margin-bottom:14px}
.kind-tag{display:inline-block;text-align:center;font-size:12px;padding:3px 0;border-radius:6px;background:var(--soft);color:var(--brand);cursor:help}
.practice-note{margin-top:18px}
.practice-head{display:grid;grid-template-columns:1fr 160px;gap:18px;align-items:start}
.practice-head h1{margin:4px 0 8px}
.factstrip{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:16px 0;padding:0}
.factstrip div{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.factstrip dt{font-size:12px;color:var(--sub)}
.factstrip dd{margin:2px 0 0;font-size:14px}
.confirm-first h2{font-size:16px;margin:0 0 8px}
.dims .dim-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.dims .dim{border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--surface)}
.dims .dim p{margin:4px 0}
.page-nav{position:sticky;top:0;z-index:2;display:flex;gap:6px;overflow-x:auto;padding:8px 0;background:var(--paper);border-bottom:1px solid var(--line);margin:14px 0}
.page-nav a{white-space:nowrap;padding:4px 10px;border-radius:999px;border:1px solid var(--line)}
.showcase img{max-width:100%;height:auto;border-radius:8px}
.showcase figcaption{margin-top:6px;font-size:14px}
.judge{font-size:12px;padding:1px 6px;border-radius:6px;background:var(--warmbg);color:var(--warm);cursor:help}
.needs li{margin:4px 0}
.alt{border-left:3px solid var(--warm)}
.steps{padding-left:22px}
.step{margin:0 0 18px}
.step h3{font-size:16px;margin:0 0 4px}
.codeblock{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:8px 0}
.code-head{display:flex;gap:8px;align-items:center;justify-content:space-between;padding:6px 10px;background:var(--soft);font-size:13px}
.code-head .copy{width:auto;padding:2px 8px;gap:4px}
.codeblock pre{margin:0;padding:10px 12px;white-space:pre-wrap;word-break:break-word}
.codeblock.folded pre{max-height:300px;overflow:hidden;-webkit-mask-image:linear-gradient(#000 60%,transparent);mask-image:linear-gradient(#000 60%,transparent)}
.codeblock.fold-none .fold-toggle{display:none}
.expect{background:var(--soft);border-radius:8px;padding:8px 10px}
.feedback-list li,.verifications li,.revisions li{margin:8px 0}
.evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.heat p{margin:4px 0;font-size:14px}
.timeline-list{list-style:none;padding:0;border-left:2px solid var(--line);margin-left:6px}
.timeline-list li{padding:0 0 14px 14px;position:relative}
.timeline-list li::before{content:"";position:absolute;left:-6px;top:6px;width:10px;height:10px;border-radius:50%;background:var(--brand)}
.timeline-list .tl-bg{color:var(--sub);font-size:14px}
.timeline-list .tl-bg::before{background:var(--line)}
.tl-node h3{margin:0 0 4px;font-size:16px}
@media (max-width:720px){
  .practice-head{grid-template-columns:1fr}
  .practice-head .practice-cover{order:-1;max-width:160px}
  .factstrip{grid-template-columns:repeat(2,1fr)}
  .dims .dim-grid,.evidence-grid{grid-template-columns:1fr}
  .practice-row{grid-template-columns:1fr}
  .kind-tag{width:44px}
}
/* Contrast: the shared cover mark dims its small text; practice covers show it at full strength (axe color-contrast). */
.practice-cover.cover-mark small{opacity:1}
/* Links inside running text are underlined so they are not identified by colour alone (axe link-in-text-block). */
.section p a:not(.primary):not(.secondary):not(.chip),.section li a:not(.primary):not(.secondary):not(.chip),.notice a{text-decoration:underline;text-underline-offset:2px}
/* 2026-10-19 改版（practice-refresh）：分类徽章、精简详情页的效果、三项评分与准备清单。 */
.badge.kind{background:var(--soft);color:var(--brand);border-color:var(--brand)}
.showcase.effect img{display:block;width:100%;max-height:520px;object-fit:contain;background:var(--surface)}
.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0;padding:0}
.score-grid .score{border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--surface)}
.score-grid dt{font-size:13px;color:var(--sub)}
.score-grid dd{margin:4px 0 0}
.score-grid small{display:block;margin-top:4px}
.dots{letter-spacing:2px;color:var(--brand)}
.dots .dot-off{color:var(--sub)}
.score-unknown{color:var(--sub)}
.score-rules{margin-top:10px}
.score-rules h3{font-size:15px;margin:12px 0 4px}
.prep-list{list-style:none;padding:0;margin:8px 0 14px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}
.prep-list b{display:inline-block;min-width:3em;color:var(--sub);font-weight:600}
@media (max-width:720px){.score-grid,.prep-list{grid-template-columns:1fr}}