/* 首页演示屏：保持已确认稿的尺寸与层次。 */
.hero { position: relative; overflow: hidden; overflow: clip; padding-top: 28px; }
.hero-copy { position: relative; z-index: 2; max-width: 900px; margin: 0 auto; padding-inline: 24px; text-align: center; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  min-height: 32px;
  padding: 4px 14px 4px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-size: 13.5px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.badge-dot { width: 8px; height: 8px; border-radius: var(--r-round); background: var(--success); color: var(--text); box-shadow: 0 0 0 3px var(--success-ring); }
.hero h1 { margin: 18px 0 0; font-size: clamp(28px,3.4vw,48px); font-weight: 800; line-height: 1.12; letter-spacing: -.02em; }
.lede { max-width: 620px; margin: 16px auto 0; font-size: 17px; line-height: 1.65; color: var(--text-muted); text-wrap: pretty; }
.lede strong { color: var(--text); font-weight: 600; }
.cta { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.platforms { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 30px; margin-top: 22px; }
.platforms a { display: inline-flex; align-items: center; gap: 8px; min-height: 22px; font-size: 14px; font-weight: 500; color: var(--text-muted); }
.platforms a:hover { color: var(--text); }
.platforms svg { width: 16px; height: 16px; flex-shrink: 0; }
.facts { position: relative; z-index: 2; max-width: var(--demo-w); margin: 22px auto 0; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 18px; }
.facts::before, .facts::after { content: ""; height: 1px; background: var(--border); color: var(--text); }
.facts ul { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.fact { display: inline-flex; align-items: center; gap: 8px; min-height: 30px; padding: 4px 12px; border: 1px solid var(--border); border-radius: var(--r-pill); background: var(--bg); color: var(--text-muted); font-family: var(--font-mono); font-size: 12.5px; }
.fact b { color: var(--text); font-weight: 600; }
.stage { position: relative; margin-top: 26px; padding-bottom: 120px; overflow-x: clip; }
.horizon {
  position: absolute;
  z-index: 0;
  left: 50%;
  top: 150px;
  width: 2600px;
  height: 720px;
  background-color: var(--clear);
  color: var(--text);
  background-image: linear-gradient(var(--border) 1px,var(--clear) 1px),linear-gradient(90deg,var(--border) 1px,var(--clear) 1px);
  background-size: 76px 76px;
  background-position: center top;
  transform: translateX(-50%) perspective(1200px) rotateX(56deg);
  transform-origin: 50% 0;
  -webkit-mask-image: radial-gradient(ellipse 46% 62% at 50% 34%,var(--mask-solid) 22%,var(--clear) 72%);
  mask-image: radial-gradient(ellipse 46% 62% at 50% 34%,var(--mask-solid) 22%,var(--clear) 72%);
  pointer-events: none;
}
.demo { position: relative; z-index: 1; width: var(--demo-w); aspect-ratio: 2/1; margin: 0 auto; border: 1px solid var(--border); border-radius: var(--r-demo); background: var(--bg); color: var(--text); box-shadow: var(--shadow-demo); overflow: hidden; }
.win { display: grid; grid-template-rows: 46px 1fr; height: 100%; }
.chrome { position: relative; display: flex; align-items: center; gap: 8px; padding: 0 24px; background: var(--bg-panel); color: var(--text); border-bottom: 1px solid var(--border); }
.chrome i { width: 12px; height: 12px; border-radius: var(--r-round); background: var(--line-strong); color: var(--text); }
.chrome-title { position: absolute; left: 50%; transform: translateX(-50%); font-size: 13px; font-weight: 500; color: var(--text-muted); letter-spacing: .01em; white-space: nowrap; }
.win-body { display: grid; grid-template-columns: 208px minmax(0,1fr) 380px; min-height: 0; }
.side { padding: 22px 14px; background: var(--bg-panel); color: var(--text); border-right: 1px solid var(--border); }
.side-name { padding: 0 14px 16px; font-family: var(--font-display); font-size: 15px; font-weight: 700; letter-spacing: -.01em; }
.side li { display: flex; align-items: center; height: 40px; margin-bottom: 4px; padding: 0 14px; border-radius: var(--r-menu); font-size: 14.5px; color: var(--text-muted); }
.side li[aria-current="true"] { background: var(--bg); color: var(--text); font-weight: 600; box-shadow: var(--shadow-raise); }
.rules { padding: 22px 28px; min-width: 0; }
.rules-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.rules-title { font-family: var(--font-display); font-size: 20px; font-weight: 700; letter-spacing: -.015em; }
.search { display: inline-flex; align-items: center; gap: 8px; width: 220px; height: 34px; padding: 0 14px; border: 1px solid var(--border); border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text-muted); font-size: 13px; }
.search svg { width: 14px; height: 14px; flex-shrink: 0; }
.rule-list { counter-reset: rule; font-family: var(--font-mono); font-size: 13px; }
.rule-list li { counter-increment: rule; display: flex; align-items: center; min-height: 42px; border-bottom: 1px solid var(--border); white-space: nowrap; color: var(--text-muted); }
.rule-list li::before { content: counter(rule); width: 34px; flex-shrink: 0; font-size: 12px; color: var(--text-muted); }
.rule-list li.is-hit { margin: 0 -12px; padding: 0 12px; border-radius: var(--r-sm); border-bottom-color: var(--clear); background: var(--bg-panel); color: var(--text-muted); }
.rt { color: var(--text); font-weight: 600; }
.cm, .opt { color: var(--text-muted); }
.pol { display: inline-flex; align-items: center; height: 22px; padding: 0 9px; border-radius: var(--r-pill); font-size: 11.5px; font-weight: 600; letter-spacing: .02em; }
.pol-proxy { background: var(--text); color: var(--on-accent); }
.pol-direct { background: var(--bg-panel-2); color: var(--text); }
.rules-note { margin: 14px 0 0; font-size: 12.5px; color: var(--text-muted); }
.cfg { display: grid; grid-template-rows: 46px 1fr; min-width: 0; background: var(--bg-panel); color: var(--text); border-left: 1px solid var(--border); }
.cfg-tabs { display: flex; align-items: stretch; padding: 0 22px; border-bottom: 1px solid var(--border); }
.cfg-tab { display: flex; align-items: center; font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; color: var(--text); box-shadow: inset 0 -2px 0 var(--text); }
.yaml { counter-reset: ln; padding: 16px 18px 16px 0; font-family: var(--font-mono); font-size: 12.5px; line-height: 23px; color: var(--text-muted); overflow-x: auto; }
.ln { counter-increment: ln; display: block; white-space: pre; }
.ln::before { content: counter(ln); display: inline-block; width: 44px; padding-right: 14px; text-align: right; color: var(--text-muted); }
.ln.is-mark { background: var(--bg-panel-2); color: var(--text-muted); }
.k { color: var(--text); font-weight: 600; }
.y-c { color: var(--text-muted); }
.play { position: absolute; z-index: 3; left: 50%; top: calc(50% - 79px); transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 18px; border-radius: var(--r-lg); }
.play-orb { position: relative; width: 104px; height: 104px; }
.play-halo { position: absolute; inset: -10px; border-radius: var(--r-round); background: var(--accent-halo); color: var(--on-accent); animation: halo 3s ease-in-out infinite; }
.play-disc { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; border-radius: var(--r-round); background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-play); transition: background .2s,transform .25s; }
.play-disc svg { width: 36px; height: 36px; margin-left: 6px; fill: var(--on-accent); }
.play:hover .play-disc { background: var(--accent-dark); color: var(--on-accent); transform: scale(1.04); }
.play-cap { display: inline-flex; align-items: center; min-height: 36px; padding: 6px 16px; border-radius: var(--r-pill); background: var(--ink-veil); color: var(--on-accent); font-size: 13.5px; font-weight: 500; white-space: nowrap; -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.home-platform-heading { color: inherit; text-decoration: none; cursor: pointer; }
.play-cap { background: var(--text); }
@media (max-width: 760px) {
  .demo { aspect-ratio: auto; }
  .win { height: auto; }
  .play { position: relative; left: auto; top: auto; transform: none; padding: 24px 12px; }
  .play-cap { max-width: 100%; white-space: normal; text-align: center; justify-content: center; }
}
@keyframes halo { 0%,100% { transform: scale(.92); opacity: .55; } 50% { transform: scale(1.08); opacity: 1; } }
.next { padding-inline: 24px; padding-bottom: 120px; }
.next-card { max-width: var(--demo-w); margin: 0 auto; padding: 72px 40px; border-radius: var(--r-demo); background: var(--bg-panel); color: var(--text); text-align: center; }
.next-card h2 { margin: 12px 0 0; font-family: var(--font-display); font-size: 30px; font-weight: 800; letter-spacing: -.02em; line-height: 1.2; }
.next-card p.desc { max-width: 560px; margin: 14px auto 0; color: var(--text-muted); }
/* 章节式演示与通用标签页。 */
.tabs { min-width: 0; }
.tab-list, [role="tablist"].tab-list { display: flex; align-items: center; gap: 8px; max-width: 100%; overflow-x: auto; padding: 6px 3px 12px; }
.tab-list [role="tab"] { flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 20px; border: 0; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text-muted); font-weight: 600; }
.tab-list [role="tab"][aria-selected="true"] { background: var(--text); color: var(--on-accent); }
[role="tabpanel"] { min-width: 0; }
[role="tabpanel"]:focus-visible { outline-offset: 6px; }
.chapter-player { display: grid; grid-template-columns: minmax(0,58fr) minmax(0,42fr); gap: 48px; align-items: start; }
.chapter-views { grid-column: 1; grid-row: 1; min-width: 0; }
.chapter-preview { min-height: 320px; display: grid; align-content: center; padding: 32px; border-radius: var(--r-lg); background: var(--bg-panel); color: var(--text); box-shadow: var(--shadow-demo); }
.chapter-preview pre { padding: 0; margin: 0; }
.chapter-description { margin: 32px 0 0; color: var(--text-muted); line-height: 1.9; }
.chapter-list { grid-column: 2; grid-row: 1; display: grid; gap: 12px; }
.chapter-list [role="tab"] { position: relative; display: block; width: 100%; padding: 24px 8px; border: 0; text-align: left; background: var(--bg); color: var(--text-muted); }
.chapter-list [role="tab"] strong { display: block; margin-bottom: 6px; font-size: 21px; color: var(--text); }
.chapter-list [role="tab"]::before, .chapter-list [role="tab"]::after { content: ""; position: absolute; bottom: 0; left: 8px; right: 8px; height: 2px; background: var(--border); color: var(--text); }
.chapter-list [role="tab"]::after { background: var(--accent); color: var(--on-accent); transform: scaleX(0); transform-origin: left; }
.chapter-list [role="tab"][aria-selected="true"] { color: var(--text); }
.chapter-list [role="tab"][aria-selected="true"]::after { transform: scaleX(1); }
.tabs.is-playing .chapter-list [role="tab"][aria-selected="true"]::after { animation: chapter-progress var(--chapter-time) linear both; }
@keyframes chapter-progress { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.toc { position: sticky; top: 12px; z-index: 10; display: flex; flex-wrap: wrap; gap: 8px; overflow-x: visible; max-width: 100%; margin-block: 24px 40px; padding: 12px; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--bg); color: var(--text); box-shadow: var(--shadow-raise); }
.toc a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 16px; flex-shrink: 0; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text-muted); font-size: 14px; }
.toc a:hover { background: var(--bg-panel-2); color: var(--text); }
.faq-item { padding: 0 28px; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--bg); color: var(--text); }
.faq-item + .faq-item { margin-top: 12px; }
.faq-item summary { position: relative; padding: 24px 32px 24px 0; font-weight: 600; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 0; top: 24px; font-family: var(--font-mono); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding-bottom: 24px; color: var(--text-muted); }
.faq-answer > :last-child { margin-bottom: 0; }
.term-card { padding: 32px; border-radius: var(--r-lg); background: var(--bg-panel); color: var(--text); min-width: 0; }
.term-card h3 { margin: 10px 0 12px; }
.term-card p { color: var(--text-muted); }
.term-card .term-en { font-family: var(--font-mono); font-size: 13px; color: var(--text-muted); }
.client-card { display: grid; gap: 24px; padding: 32px; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--bg); color: var(--text); min-width: 0; }
.client-card.is-primary { background: var(--bg-panel); color: var(--text); border-color: var(--clear); }
.client-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.client-heading h3 { margin: 0 0 8px; }
.client-card p { color: var(--text-muted); }
.client-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.client-revision { font-family: var(--font-mono); font-size: 13px; color: var(--text-muted); }
[data-rev]:empty { display: none; }
.client-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--text-muted); font-size: 14px; }
.badge-first, .badge-recommended, .badge-archived, .tag { display: inline-flex; align-items: center; gap: 6px; max-width: 100%; padding: 5px 12px; border-radius: var(--r-pill); font-size: 12px; font-weight: 600; line-height: 1.5; white-space: normal; overflow-wrap: anywhere; }
.badge-first { background: var(--text); color: var(--on-accent); }
.badge-recommended { background: var(--bg-panel-2); color: var(--text); }
.badge-archived { background: var(--bg-panel-2); color: var(--text-muted); }
.badge-archived::before { content: ""; width: 6px; height: 6px; flex-shrink: 0; border-radius: var(--r-round); background: var(--warn); color: var(--text); }
.tag { background: var(--bg-panel); color: var(--text-muted); font-weight: 500; }
.post-card { min-width: 0; padding: 32px; border-radius: var(--r-lg); border: 1px solid var(--border); background: var(--bg); color: var(--text); transition: box-shadow .2s; }
.post-card:hover { box-shadow: var(--shadow-raise); }
.post-card h3 { margin: 20px 0 14px; font-size: 23px; }
.post-card h3 a:hover { color: var(--accent); }
.post-card p { color: var(--text-muted); }
.post-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; color: var(--text-muted); font-size: 13px; }
.post-meta time { font-family: var(--font-mono); }
.callout { margin-block: 24px; padding: 24px 28px; border-left: 3px solid var(--line-strong); border-radius: var(--r-md); background: var(--bg-panel); color: var(--text); }
.callout p:last-child { margin-bottom: 0; }
.callout-warning { border-left-color: var(--warn); }
.callout-error { border-left-color: var(--error); }
.callout-success { border-left-color: var(--success); }
.table-scroll { max-width: 100%; min-width: 0; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r-md); -webkit-overflow-scrolling: touch; }
.data-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; }
.data-table th, .data-table td, .prose table th, .prose table td, .article-body table th, .article-body table td { min-width: 7em; padding: 16px 20px; border-bottom: 1px solid var(--border); overflow-wrap: normal; word-break: normal; vertical-align: top; }
.data-table th, .prose table th, .article-body table th { background: var(--bg-panel); color: var(--text); font-weight: 600; }
.data-table td { background: var(--bg); color: var(--text-muted); }
.data-table tr:last-child td { border-bottom: 0; }
.prose table, .article-body table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; max-width: 100%; min-width: 0; border-collapse: collapse; }
.prose table code, .article-body table code { overflow-wrap: anywhere; }
.download-note { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; margin-top: 64px; padding: 32px; border-radius: var(--r-lg); background: var(--bg-panel); color: var(--text); }
.download-note h2 { margin: 0 0 10px; font-size: 24px; }
.download-note p { margin: 0; color: var(--text-muted); }
.dl-fab { position: fixed; right: 24px; bottom: 24px; z-index: 40; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 20px 10px 16px; border-radius: var(--r-pill); background: var(--text); color: var(--on-accent); font-size: 14.5px; font-weight: 600; box-shadow: var(--shadow-fab); transition: transform .2s; }
.dl-fab svg { width: 17px; height: 17px; flex-shrink: 0; }
.dl-fab:hover { transform: translateY(-2px); }
/* 预览用色板：色块内不叠文字，以免浅色令牌影响可读性。 */
.swatches { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 20px; }
.swatch { min-width: 0; }
.swatch-sample { height: 72px; margin-bottom: 10px; border: 1px solid var(--border); border-radius: var(--r-md); color: var(--text); }
.swatch code { font-size: 12px; }
.sw-bg { background: var(--bg); color: var(--text); }
.sw-panel { background: var(--bg-panel); color: var(--text); }
.sw-panel2 { background: var(--bg-panel-2); color: var(--text); }
.sw-border { background: var(--border); color: var(--text); }
.sw-line { background: var(--line-strong); color: var(--text); }
.sw-accent { background: var(--accent); color: var(--on-accent); }
.sw-accent-dark { background: var(--accent-dark); color: var(--on-accent); }
.sw-text { background: var(--text); color: var(--on-accent); }
.sw-muted { background: var(--text-muted); color: var(--on-accent); }
.sw-faint { background: var(--text-faint); color: var(--text); }
.sw-success { background: var(--success); color: var(--text); }
.sw-warn { background: var(--warn); color: var(--text); }
.sw-error { background: var(--error); color: var(--text); }
.sw-halo { background: var(--accent-halo); color: var(--text); }
.sw-ring { background: var(--success-ring); color: var(--text); }
.sw-veil { background: var(--ink-veil); color: var(--on-accent); }
.sw-overlay { background: var(--overlay); color: var(--text); }
.sw-mask { background: var(--mask-solid); color: var(--on-accent); }
.sw-clear { background: var(--clear); color: var(--text); }
.type-display { font-family: var(--font-display); font-size: 48px; font-weight: 800; line-height: 1.12; letter-spacing: -.02em; }
.preview-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-block: 24px; }
.preview-lang { position: relative; }
.preview-lang summary { list-style: none; cursor: pointer; }
.preview-lang summary::-webkit-details-marker { display: none; }
@media (max-width: 1080px) {
  .win-body { grid-template-columns: 176px minmax(0,1fr); }
  .cfg { display: none; }
}
@media (max-width: 800px) {
  .chapter-player { display: flex; flex-direction: column; gap: 28px; }
  .chapter-views, .chapter-list { width: 100%; }
  .chapter-list { display: flex; gap: 8px; overflow-x: auto; padding: 4px 3px 12px; }
  .chapter-list [role="tab"] { flex-shrink: 0; width: auto; min-height: 44px; padding: 10px 20px; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text-muted); }
  .chapter-list [role="tab"] strong { font-size: 14px; margin: 0; }
  .chapter-list [role="tab"] span { display: none; }
  .chapter-list [role="tab"]::before, .chapter-list [role="tab"]::after { display: none; }
  .chapter-list [role="tab"][aria-selected="true"] { background: var(--text); color: var(--on-accent); }
  .chapter-list [role="tab"][aria-selected="true"] strong { color: var(--on-accent); }
}
@media (max-width: 760px) {
  .hero { padding-top: 20px; }
  .hero h1 { font-size: clamp(24px,7vw,30px); }
  .lede { font-size: 15px; }
  .platforms { gap: 10px 18px; }
  .facts { grid-template-columns: minmax(0,1fr); padding-inline: 20px; }
  .facts::before, .facts::after { display: none; }
  .stage { padding-bottom: 72px; }
  .demo { aspect-ratio: auto; border-radius: var(--r-lg); }
  .win-body { grid-template-columns: minmax(0,1fr); }
  .side { display: none; }
  .rules { padding: 18px; overflow-x: auto; }
  .search { display: none; }
  .rule-list { font-size: 11.5px; }
  .rule-list li::before { width: 24px; }
  .play { top: auto; }
  .play-orb { width: 76px; height: 76px; }
  .play-disc svg { width: 28px; height: 28px; }
  .play-cap { font-size: 12px; min-height: 32px; padding: 6px 12px; }
  .next-card { padding: 48px 22px; border-radius: var(--r-lg); }
  .next-card h2 { font-size: 24px; }
  .dl-fab { right: 16px; bottom: max(16px,env(safe-area-inset-bottom)); min-height: 42px; font-size: 13.5px; }
  .swatches { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .type-display { font-size: 30px; }
}
@media (max-width: 640px) {
  .client-card, .term-card, .post-card, .chapter-preview { padding: 24px; }
  .faq-item { padding-inline: 20px; }
  .callout { padding: 20px; }
  .download-note { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .play-halo { animation: none; opacity: .8; transform: none; }
  .tabs.is-playing .chapter-list [role="tab"][aria-selected="true"]::after { animation: none; transform: scaleX(1); }
}