/* 首屏采用已确认的设备在左、文案在右构图。 */
.hero {
  min-height: calc(100svh - var(--nav-h) - var(--peek));
  display: grid;
  grid-template-rows: 1fr auto;
  background: var(--bg);
  color: var(--text);
}
.hero-main { display: grid; align-content: center; padding-top: 36px; padding-bottom: 40px; }
.hero-grid {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 56fr 44fr;
  gap: 56px;
  align-items: center;
}
.copy { max-width: 520px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: 100%;
  padding: 6px 13px 6px 11px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--text-muted);
  box-shadow: var(--shadow-card);
  font-size: var(--size-sm);
}
.pill-dot { width: 7px; height: 7px; border-radius: var(--r-round); background: var(--accent); color: var(--text); box-shadow: 0 0 0 3px var(--accent-soft); }
.copy .h1 { margin: 24px 0 0; }
.copy .cta { margin-top: 32px; }
.copy .lede { margin: 20px 0 0; max-width: 29em; }
.platforms { margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--border); }
.platforms-label { margin: 0 0 12px; color: var(--text-muted); font-size: var(--size-xs); letter-spacing: .04em; }
.plat-row { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.plat { display: inline-flex; align-items: center; gap: 7px; color: var(--text-muted); font-size: var(--size-sm); text-decoration: none; transition: color var(--fast) var(--ease); }
.plat svg { width: 16px; height: 16px; flex-shrink: 0; }
.plat:hover { color: var(--accent-dark); }
.facts { border-top: 1px solid var(--border); background: var(--bg); color: var(--text); }
.facts-row { max-width: var(--wrap); margin-inline: auto; padding: 16px var(--gutter); display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.fact { display: inline-flex; align-items: center; gap: 8px; max-width: 100%; padding: 6px 14px; border: 1px solid var(--border); border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text); font-family: var(--font-mono); font-size: var(--size-xs); }
.fact-k { color: var(--text-muted); }
.fact-sep { width: 1px; height: 11px; background: var(--border-strong); color: var(--text); flex-shrink: 0; }
.stage { --s: 1; position: relative; width: calc(640px * var(--s)); height: calc(452px * var(--s)); animation: device-rise .8s var(--ease) .1s both; }
.devices { position: absolute; left: 0; top: 0; width: 640px; height: 452px; transform: scale(var(--s)); transform-origin: 0 0; }
.laptop { position: absolute; left: 30px; top: 0; width: 540px; }
.lid { position: relative; height: 340px; padding: 10px 10px 18px; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-lid) var(--r-lid) var(--r-xs) var(--r-xs); box-shadow: var(--shadow-laptop); }
.lid::before { content: ""; position: absolute; top: 4px; left: 50%; width: 4px; height: 4px; margin-left: -2px; border-radius: var(--r-round); background: var(--bg-panel-2); color: var(--text); }
.screen { position: relative; height: 100%; border-radius: var(--r-sm); background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); overflow: hidden; }
.base { position: relative; width: 600px; height: 13px; margin-left: -30px; background: var(--bg-panel-2); color: var(--text); border: 1px solid var(--border-strong); border-radius: var(--r-xs) var(--r-xs) var(--r-lid) var(--r-lid); box-shadow: var(--shadow-base); }
.base::before { content: ""; position: absolute; top: -1px; left: 50%; width: 96px; height: 5px; margin-left: -48px; border-radius: 0 0 var(--r-sm) var(--r-sm); background: var(--border-strong); color: var(--text); }
.win { position: absolute; inset: 12px 12px 0; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-bottom: 0; border-radius: var(--r-md) var(--r-md) 0 0; box-shadow: var(--shadow-window); overflow: hidden; display: grid; grid-template-rows: 26px 1fr; }
.win-bar { position: relative; display: flex; align-items: center; padding-inline: 10px; background: var(--bg-panel); color: var(--text); border-bottom: 1px solid var(--border); }
.dots { display: flex; gap: 6px; }
.dot { width: 9px; height: 9px; border-radius: var(--r-round); flex-shrink: 0; }
.dot-r { background: var(--error); color: var(--text); }
.dot-y { background: var(--warn); color: var(--text); }
.dot-g { background: var(--success); color: var(--text); }
.win-title { position: absolute; left: 0; right: 0; text-align: center; font-size: var(--size-device-body); font-weight: var(--weight-medium); color: var(--text-muted); }
.win-body { display: grid; grid-template-columns: 108px 1fr; min-height: 0; }
.side { display: flex; flex-direction: column; justify-content: space-between; padding: 10px 8px; background: var(--bg-panel); color: var(--text); border-right: 1px solid var(--border); }
.side-nav { display: flex; flex-direction: column; gap: 2px; margin: 0; padding: 0; list-style: none; }
.side-nav li { display: flex; align-items: center; gap: 7px; height: 24px; padding-inline: 8px; border-radius: var(--r-xs); font-size: var(--size-device-body); color: var(--text-muted); }
.side-nav li::before { content: ""; width: 5px; height: 5px; border-radius: var(--r-round); background: var(--border-strong); color: var(--text); flex-shrink: 0; }
.side-nav .is-on { background: var(--accent-soft); color: var(--accent-dark); font-weight: var(--weight-medium); }
.side-nav .is-on::before { background: var(--accent); color: var(--text); }
.side-foot { display: flex; align-items: center; gap: 6px; padding-inline: 8px; font-size: var(--size-device-small); color: var(--text-muted); }
.side-foot::before { content: ""; width: 6px; height: 6px; border-radius: var(--r-round); background: var(--success); color: var(--text); }
.pane { padding-inline: 14px; min-width: 0; }
.pane-head { display: flex; align-items: center; justify-content: space-between; height: 36px; }
.pane-head b { font-size: var(--size-sm); }
.pane-head span { font-size: var(--size-device-small); color: var(--text-muted); }
.seg { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); width: 186px; height: 24px; padding: 2px; background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-sm); }
.seg-thumb { position: absolute; top: 2px; bottom: 2px; left: 2px; width: calc((100% - 4px) / 3); border-radius: var(--r-xs); background: var(--accent); color: var(--on-accent); animation: mode-thumb var(--cycle) ease-in-out 1s infinite; }
.seg-item { position: relative; z-index: 1; display: grid; place-items: center; font-size: var(--size-device-rule); font-weight: var(--weight-medium); }
.seg-item > span { grid-area: 1 / 1; }
.seg-base { color: var(--text-muted); }
.seg-on { color: var(--on-accent); }
.rules-head { margin: 14px 0 4px; font-size: var(--size-device-small); color: var(--text-muted); }
.rules { margin: 0; padding: 0; list-style: none; }
.rules li { position: relative; display: flex; align-items: center; height: 22px; padding-inline: 8px; margin-inline: -8px; border-radius: var(--r-xs); font-family: var(--font-mono); font-size: var(--size-device-rule); color: var(--text); white-space: nowrap; }
.rules .k { color: var(--text-muted); }
.rules .hit { background: var(--accent-soft); color: var(--accent-dark); }
.rules .hit .k { color: var(--accent-dark); }
.rules .hit::before { content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 2px; border-radius: var(--r-xs); background: var(--accent); color: var(--text); }
.phone { position: absolute; right: 0; top: 84px; width: 176px; height: 364px; padding: 6px; background: var(--bg); color: var(--text); border: 1px solid var(--border-strong); border-radius: var(--r-phone); box-shadow: var(--shadow-phone); }
.p-screen { position: relative; height: 100%; border-radius: var(--r-screen); background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); overflow: hidden; padding: 30px 10px 0; }
.p-status { position: absolute; left: 0; right: 0; top: 0; height: 26px; display: flex; align-items: center; justify-content: space-between; padding: 0 16px 0 18px; font-size: var(--size-device-small); font-weight: var(--weight-medium); }
.p-notch { position: absolute; top: 6px; left: 50%; width: 52px; height: 15px; margin-left: -26px; border-radius: var(--r-pill); background: var(--text); color: var(--bg); }
.p-sys { display: flex; align-items: center; gap: 4px; }
.p-sys svg { height: 8px; width: auto; }
.p-head { display: flex; align-items: center; justify-content: space-between; margin: 6px 2px 10px; }
.p-head b { font-family: var(--font-display); font-size: var(--size-nav); font-weight: var(--weight-display); }
.p-head svg { width: 14px; height: 14px; color: var(--text-muted); }
.p-card { background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-md); box-shadow: var(--shadow-card); }
.p-profile { display: flex; align-items: center; justify-content: space-between; padding: 9px 10px; margin-bottom: 8px; }
.p-k { display: block; font-size: var(--size-device-tiny); color: var(--text-muted); line-height: 1.3; }
.p-profile b { display: block; font-size: var(--size-xs); line-height: 1.4; }
.p-chip { padding: 2px 7px; border-radius: var(--r-pill); background: var(--accent-soft); color: var(--accent-dark); font-size: var(--size-device-tiny); font-weight: var(--weight-medium); }
.p-mode { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; margin-bottom: 8px; font-size: var(--size-device-rule); }
.p-mode-val { display: grid; padding: 2px 9px; border-radius: var(--r-pill); background: var(--accent-soft); color: var(--accent-dark); font-size: var(--size-device-small); font-weight: var(--weight-bold); }
.p-mode-val > span { grid-area: 1 / 1; text-align: center; }
.p-list { padding: 0; margin: 0; list-style: none; }
.p-list li { display: flex; align-items: center; justify-content: space-between; height: 30px; padding-inline: 10px; font-size: var(--size-device-rule); }
.p-list li + li { border-top: 1px solid var(--border); }
.tg { position: relative; width: 24px; height: 14px; flex-shrink: 0; border-radius: var(--r-pill); background: var(--bg-panel-2); color: var(--text); border: 1px solid var(--border-strong); }
.tg::after { content: ""; position: absolute; top: 1px; left: 1px; width: 10px; height: 10px; border-radius: var(--r-round); background: var(--bg); color: var(--text); box-shadow: var(--shadow-knob); }
.tg.is-on { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.tg.is-on::after { transform: translateX(10px); }
.p-connect { display: flex; align-items: center; justify-content: center; gap: 6px; height: 32px; margin-top: 10px; border-radius: var(--r-md); background: var(--accent); color: var(--on-accent); font-size: var(--size-device-body); font-weight: var(--weight-bold); }
.p-connect svg { width: 11px; height: 11px; }
.p-home { position: absolute; bottom: 7px; left: 50%; width: 56px; height: 4px; margin-left: -28px; border-radius: var(--r-pill); background: var(--text); color: var(--bg); }
.on-a { opacity: 1; animation: mode-a var(--cycle) ease-in-out 1s infinite; }
.on-b { opacity: 0; animation: mode-b var(--cycle) ease-in-out 1s infinite; }
.on-c { opacity: 0; animation: mode-c var(--cycle) ease-in-out 1s infinite; }
.off-a { opacity: 0; animation: mode-a var(--cycle) ease-in-out 1s infinite reverse; }
.off-b { opacity: 1; animation: mode-b var(--cycle) ease-in-out 1s infinite reverse; }
.off-c { opacity: 1; animation: mode-c var(--cycle) ease-in-out 1s infinite reverse; }
@keyframes device-rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes mode-thumb { 0%,30% { transform: translateX(0); } 33.33%,63.33% { transform: translateX(100%); } 66.67%,96.67% { transform: translateX(200%); } 100% { transform: translateX(0); } }
@keyframes mode-a { 0%,30% { opacity: 1; } 33.33%,96.67% { opacity: 0; } 100% { opacity: 1; } }
@keyframes mode-b { 0%,30% { opacity: 0; } 33.33%,63.33% { opacity: 1; } 66.67%,100% { opacity: 0; } }
@keyframes mode-c { 0%,63.33% { opacity: 0; } 66.67%,96.67% { opacity: 1; } 100% { opacity: 0; } }
/* 静态预览不运行首屏动画。 */
.preview .stage, .preview .seg-thumb, .preview .seg-item span, .preview .p-mode-val span { animation: none; }

.downloads { background: var(--bg-panel); color: var(--text); padding-top: 96px; padding-bottom: 112px; }
.dl-title { margin: 10px 0 0; font-size: var(--size-h2); font-weight: var(--weight-display); }
.dl-lede { margin: 14px 0 0; max-width: 36em; color: var(--text-muted); }
.dl-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; margin-top: 40px; }
.dl-card { display: flex; flex-direction: column; gap: 6px; padding: 22px 20px; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-md); box-shadow: var(--shadow-card); text-decoration: none; transition: border-color var(--fast) var(--ease); }
.dl-card:hover { border-color: var(--accent-line); }
.dl-card span { color: var(--text-muted); font-size: var(--size-sm); }
.dl-card em { margin-top: 8px; font-style: normal; color: var(--accent-dark); font-size: var(--size-sm); font-weight: var(--weight-medium); }
.tab-list { display: flex; flex-wrap: wrap; gap: 8px 24px; border-bottom: 1px solid var(--border); }
.tab-list [role="tab"] { position: relative; min-height: 48px; padding: 12px 2px; border: 0; background: var(--clear); color: var(--text-muted); font-weight: var(--weight-medium); }
.tab-list [role="tab"][aria-selected="true"] { color: var(--text); }
.tab-list [role="tab"][aria-selected="true"]::after { content: ""; position: absolute; bottom: -1px; left: 0; right: 0; height: 2px; background: var(--accent); color: var(--text); }
.tab-panel { padding-top: 28px; scroll-margin-top: calc(var(--nav-h) + 24px); }
.feature-deck { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 88px; }
.feature-screen { position: relative; width: 280px; height: 540px; margin-inline: auto; padding: 10px; border: 1px solid var(--border-strong); border-radius: var(--r-phone); background: var(--bg); color: var(--text); box-shadow: var(--shadow-phone); }
.feature-screen-inner { height: 100%; border: 1px solid var(--border); border-radius: var(--r-screen); padding: 52px 18px 20px; background: var(--bg-panel); color: var(--text); overflow-x: auto; }
.feature-screen .p-notch { top: 16px; }
.feature-screen h3 { font-size: var(--size-body); }
.feature-screen pre { padding: 12px; font-size: var(--size-xs); background: var(--bg); color: var(--text); }
.feature-tabs { display: flex; flex-direction: column; gap: 0; border: 0; }
.feature-tabs [role="tab"] { position: relative; display: block; width: 100%; text-align: left; border: 0; border-bottom: 1px solid var(--border); padding: 20px 22px; background: var(--bg); color: var(--text-muted); font-weight: var(--weight-bold); }
.feature-tabs [aria-selected="true"] { color: var(--text); }
.feature-tabs [aria-selected="true"]::before { content: ""; position: absolute; top: 20px; bottom: 20px; left: 0; width: 2px; background: var(--accent); color: var(--text); }
.feature-detail { display: block; margin-top: 14px; font-size: var(--size-sm); line-height: 1.9; font-weight: var(--weight-normal); color: var(--text-muted); }
.feature-tabs [aria-selected="false"] .feature-detail { display: none; }
.feature-progress { position: absolute; left: 22px; right: 22px; bottom: 0; height: 1px; background: var(--border); color: var(--text); overflow: hidden; }
.feature-progress::after { content: ""; display: block; height: 100%; background: var(--accent); color: var(--text); transform: scaleX(0); transform-origin: left; }
[data-autoplay].is-playing [aria-selected="true"] .feature-progress::after { animation: feature-progress var(--feature-time) linear both; }
@keyframes feature-progress { to { transform: scaleX(1); } }
.editorial-row { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 88px; padding-top: 64px; padding-bottom: 64px; }
.editorial-row:nth-child(even) .editorial-copy { order: -1; }
.toc { position: sticky; top: var(--nav-h); z-index: 10; display: flex; gap: 8px 22px; overflow-x: auto; max-width: 100%; padding: 14px 0; background: var(--bg); color: var(--text); border-bottom: 1px solid var(--border); }
.toc a { display: inline-flex; align-items: center; min-height: 44px; flex-shrink: 0; text-decoration: none; color: var(--text-muted); font-size: var(--size-sm); }
.toc a:hover { color: var(--accent-dark); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary { position: relative; padding: 22px 36px 22px 0; cursor: pointer; list-style: none; font-weight: var(--weight-medium); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 8px; top: 22px; color: var(--accent-dark); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding-bottom: 22px; max-width: 65em; color: var(--text-muted); }
.term-card { border-top: 2px solid var(--accent-line); }
.term-card dt { font-size: var(--size-h3); font-weight: var(--weight-bold); }
.term-card dd { margin: 16px 0 0; color: var(--text-muted); }
.term-alias { display: block; margin-top: 6px; font-family: var(--font-mono); font-size: var(--size-xs); color: var(--text-muted); }
.client-card { display: flex; flex-direction: column; gap: 20px; }
.client-head { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
.client-icon { width: 56px; height: 56px; flex-shrink: 0; }
.client-head h3 { margin: 0; }
.client-card .button-row { margin-top: auto; }
[data-rev]:empty { display: none; }
.badge, .tag { display: inline-flex; align-items: center; max-width: 100%; padding: 4px 9px; border: 1px solid var(--border); border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text-muted); font-size: var(--size-xs); line-height: 1.5; overflow-wrap: anywhere; }
.badge-first, .badge-recommended { background: var(--accent-soft); color: var(--accent-dark); border-color: var(--accent-line); }
.badge-archived { background: var(--bg-panel-2); color: var(--text); border-color: var(--border-strong); }
.post-card { display: flex; flex-direction: column; gap: 16px; }
.post-card h3 { margin: 0; }
.post-card h3 a { color: var(--text); text-decoration: none; }
.post-card h3 a:hover { color: var(--accent-dark); }
.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: var(--size-xs); }
.post-card .post-link { margin-top: auto; }
.callout { margin: 24px 0; padding: 20px 24px; border: 1px solid var(--border); border-left: 2px solid var(--accent); border-radius: var(--r-md); background: var(--bg-panel); color: var(--text); }
.callout p:last-child { margin-bottom: 0; }
.table-scroll { overflow-x: auto; max-width: 100%; min-width: 0; -webkit-overflow-scrolling: touch; }
.data-table { width: 100%; border-collapse: collapse; background: var(--bg); color: var(--text); font-size: var(--size-sm); }
.data-table th, .data-table td, .prose table th, .prose table td, .article-body table th, .article-body table td { min-width: 7em; padding: 15px 18px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; overflow-wrap: normal; word-break: normal; }
.data-table th, .prose table th, .article-body table th { background: var(--bg-panel); color: var(--text); font-weight: var(--weight-medium); }
.prose table, .article-body table { display: block; overflow-x: auto; max-width: 100%; min-width: 0; border-collapse: collapse; -webkit-overflow-scrolling: touch; }
.prose table code, .article-body table code, .data-table code { overflow-wrap: anywhere; white-space: normal; }
.article-download { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; margin-top: 48px; }
.article-download h2 { font-size: var(--size-h3); margin-bottom: 8px; }
.article-download p { margin: 0; color: var(--text-muted); }
.dl-fab { position: fixed; right: 24px; bottom: 24px; z-index: 25; display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 56px; max-width: calc(100vw - 40px); padding: 12px 18px; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-md); box-shadow: var(--shadow-window); text-decoration: none; }
.dl-fab svg { width: 22px; height: 22px; color: var(--accent-dark); }
.dl-fab small { display: block; color: var(--text-muted); font-size: var(--size-xs); }
.dl-fab:hover { border-color: var(--accent-line); }
.swatch-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.swatch { margin: 0; border: 1px solid var(--border); border-radius: var(--r-md); overflow: hidden; background: var(--bg); color: var(--text); }
.swatch-paint { display: block; height: 64px; }
.swatch figcaption { padding: 12px; font-family: var(--font-mono); font-size: var(--size-xs); }
.paint-bg { background: var(--bg); color: var(--text); }
.paint-panel { background: var(--bg-panel); color: var(--text); }
.paint-panel2 { background: var(--bg-panel-2); color: var(--text); }
.paint-border { background: var(--border); color: var(--text); }
.paint-strong { background: var(--border-strong); color: var(--text); }
.paint-accent { background: var(--accent); color: var(--text); }
.paint-dark { background: var(--accent-dark); color: var(--on-accent); }
.paint-soft { background: var(--accent-soft); color: var(--text); }
.paint-line { background: var(--accent-line); color: var(--text); }
.paint-text { background: var(--text); color: var(--bg); }
.paint-muted { background: var(--text-muted); color: var(--bg); }
.paint-faint { background: var(--text-faint); color: var(--text); }
.paint-success { background: var(--success); color: var(--text); }
.paint-warn { background: var(--warn); color: var(--text); }
.paint-error { background: var(--error); color: var(--text); }
.paint-veil { background: var(--veil); color: var(--text); }
.paint-clear { background: var(--clear); color: var(--text); }
.preview-stack > * + * { margin-top: 24px; }
@media (max-width: 1360px) { .stage { --s: .92; } }
@media (max-width: 1200px) { .stage { --s: .8; } .hero-grid { gap: 40px; } }
@media (max-width: 1000px) {
  .hero { min-height: 0; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 48px; justify-items: center; }
  .copy { order: 1; max-width: 620px; text-align: center; }
  .copy .cta, .plat-row { justify-content: center; }
  .copy .lede { margin-inline: auto; }
  .stage { order: 2; --s: .9; }
  .dl-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-deck, .editorial-row { gap: 40px; }
}
@media (max-width: 760px) {
  .stage { --s: .56; height: calc(764px * var(--s)); }
  .devices { height: 764px; }
  .phone { top: 380px; right: 232px; }
  .copy .lede { font-size: var(--size-nav); }
  .dl-title { font-size: var(--size-mobile-h2); }
  .dl-grid { grid-template-columns: minmax(0, 1fr); }
  .feature-deck, .editorial-row { grid-template-columns: minmax(0, 1fr); }
  .editorial-row:nth-child(even) .editorial-copy { order: initial; }
  .feature-screen { width: 260px; height: 500px; }
  .swatch-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .facts-row { gap: 8px; }
  .fact { font-size: var(--size-device-body); padding: 6px 9px; }
  .dl-fab { right: 20px; bottom: 16px; }
  .platforms { margin-top: 28px; }
  .plat-row { gap: 10px 18px; }
}
@media (max-width: 400px) { .stage { --s: .5; } }
@media (max-width: 360px) { .stage { --s: .43; } }
@media (prefers-reduced-motion: reduce) {
  .stage, .seg-thumb, .on-a, .on-b, .on-c, .off-a, .off-b, .off-c { animation: none; }
}