/* Mousetroke 产品页。品牌色取自引擎轨迹默认色 #0098d9；其余保持安静，把表现力留给"能画的页面"。 */
:root {
  --bg: #e9edf2;
  --bg-deep: #dfe5ec;
  --surface: #ffffff;
  --ink: #10151f;
  --ink-2: #3a4352;
  --muted: #5b6576;
  --rule: #cfd6e0;
  --trail: #0098d9;
  --trail-ink: #006f9f;
  --trail-soft: rgba(0, 152, 217, 0.12);
  --ok: #18a058;
  --pill: #1c222c;
  --pill-ink: #f4f7fb;
  --desk: #2a3b52;
  --shadow-win: 0 1px 0 rgba(16, 21, 31, 0.04), 0 18px 48px -18px rgba(16, 32, 64, 0.35);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --font: "Schibsted Grotesk", "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f141c;
    --bg-deep: #0b1016;
    --surface: #171e29;
    --ink: #e8edf4;
    --ink-2: #c3ccd8;
    --muted: #8d98a9;
    --rule: #263142;
    --trail: #2ec5ff;
    --trail-ink: #7fd9ff;
    --trail-soft: rgba(46, 197, 255, 0.12);
    --ok: #3ccf84;
    --pill: #e9eef5;
    --pill-ink: #121821;
    --desk: #1d2a3b;
    --shadow-win: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 18px 48px -18px rgba(0, 0, 0, 0.7);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f141c;
  --bg-deep: #0b1016;
  --surface: #171e29;
  --ink: #e8edf4;
  --ink-2: #c3ccd8;
  --muted: #8d98a9;
  --rule: #263142;
  --trail: #2ec5ff;
  --trail-ink: #7fd9ff;
  --trail-soft: rgba(46, 197, 255, 0.12);
  --ok: #3ccf84;
  --pill: #e9eef5;
  --pill-ink: #121821;
  --desk: #1d2a3b;
  --shadow-win: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 18px 48px -18px rgba(0, 0, 0, 0.7);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
img, svg { display: block; }
code { font-family: "Cascadia Code", "JetBrains Mono", Consolas, monospace; font-size: 0.86em; }
:focus-visible { outline: 2px solid var(--trail); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 var(--gutter); }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- 顶栏 ---------- */
.top {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.top.scrolled { border-bottom-color: var(--rule); }
.top .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; letter-spacing: -0.01em; }
.brand svg { width: 28px; height: 28px; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a { text-decoration: none; color: var(--ink-2); font-size: 15px; padding: 6px 10px; border-radius: 8px; transition: background 0.2s, color 0.2s; }
.nav a:hover { background: var(--trail-soft); color: var(--ink); }
.lang { font-size: 14px; color: var(--muted); text-decoration: none; padding: 6px 8px; white-space: nowrap; }
.lang:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 16px/1 var(--font);
  padding: 14px 20px; border-radius: 12px;
  text-decoration: none; border: 1px solid var(--rule); background: var(--surface); color: var(--ink);
  cursor: pointer; transition: transform 0.25s var(--ease-spring), background 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(1px) scale(0.98); }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.primary:hover { box-shadow: 0 10px 24px -10px color-mix(in srgb, var(--ink) 70%, transparent); }
.btn.small { padding: 9px 14px; font-size: 14px; border-radius: 10px; }
.btn small { font-weight: 400; opacity: 0.7; font-size: 13px; }
@media (max-width: 860px) { .nav { display: none; } .top .lang { margin-left: auto; } }

/* ---------- 首屏 ---------- */
.hero { padding: clamp(32px, 6vw, 72px) 0 110px; position: relative; min-height: calc(100svh - 60px); display: flex; flex-direction: column; justify-content: center; }
.hero > .wrap { width: 100%; }
.cue { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 14px; text-decoration: none; white-space: nowrap; transition: color 0.2s; }
.cue:hover { color: var(--ink); }
.cue-ico { display: flex; align-items: center; gap: 4px; }
.cue .rb { fill: var(--trail); }
.cue-trail path { fill: none; stroke: var(--trail); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; stroke-dashoffset: 1; animation: cue 2.4s 2.4s var(--ease-out) infinite; }
@keyframes cue { 0% { stroke-dashoffset: 1; opacity: 1; } 45% { stroke-dashoffset: 0; opacity: 1; } 80%, 100% { stroke-dashoffset: 0; opacity: 0; } }
.js .cue { opacity: 0; animation: cue-in 0.9s 1.6s var(--ease-out) forwards; }
@keyframes cue-in { to { opacity: 1; } }
@media (max-width: 960px) { .hero { min-height: 0; padding-bottom: 96px; } }
.hero-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.25fr); gap: clamp(24px, 4vw, 56px); align-items: center; }
.hero h1 {
  font-size: clamp(44px, 6.4vw, 84px);
  line-height: 1.02; letter-spacing: -0.035em; font-weight: 800;
  margin: 0 0 22px;
}
.lede { font-size: clamp(17px, 1.6vw, 20px); color: var(--ink-2); max-width: 30em; margin: 0 0 30px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.meta { margin-top: 22px; color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 6px 18px; padding: 0; list-style: none; }
.meta li { display: flex; align-items: center; gap: 6px; }
.meta li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--ok); }
:lang(en) .hero h1 { font-size: clamp(40px, 5vw, 68px); }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; } }

/* ---------- 画板：模拟桌面 + 浏览器 ---------- */
.stage {
  position: relative; aspect-ratio: 16 / 11; border-radius: 18px;
  background:
    radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--ink) 14%, transparent) 1px, transparent 0) 0 0 / 22px 22px,
    var(--bg-deep);
  overflow: hidden; touch-action: none; user-select: none; -webkit-user-select: none;
  cursor: crosshair; isolation: isolate;
  border: 1px solid var(--rule);
}
.stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 5; pointer-events: none; }
.stage .hint {
  position: absolute; left: 50%; top: 14px; transform: translateX(-50%); z-index: 6;
  font-size: 13px; color: var(--muted); background: color-mix(in srgb, var(--surface) 88%, transparent);
  padding: 6px 12px; border-radius: 999px; white-space: nowrap; pointer-events: none; transition: opacity 0.4s;
  border: 1px solid var(--rule);
}
.stage.used .hint { opacity: 0; }
@media (max-width: 600px) {
  .stage { aspect-ratio: 1 / 1; }
  .stage .hint { font-size: 12px; top: 10px; }
  .browser { top: 13%; height: 74%; left: 5%; width: 90%; }
}
.gpill {
  position: absolute; left: 50%; bottom: 9%; z-index: 7; pointer-events: none;
  transform: translate(-50%, 8px) scale(0.96); opacity: 0;
  background: var(--pill); color: var(--pill-ink);
  padding: 9px 18px; border-radius: 999px; font-size: 17px; font-weight: 600;
  display: flex; gap: 10px; align-items: center; white-space: nowrap;
  transition: opacity 0.18s, transform 0.25s var(--ease-spring);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.45);
}
.gpill.on { opacity: 1; transform: translate(-50%, 0) scale(1); }
.gpill .arrows { opacity: 0.6; font-weight: 500; letter-spacing: 0.08em; }
.gpill.miss { background: color-mix(in srgb, var(--pill) 75%, transparent); }

.browser {
  position: absolute; left: 7%; top: 15%; width: 86%; height: 72%;
  background: var(--surface); border-radius: 12px; box-shadow: var(--shadow-win);
  display: flex; flex-direction: column; overflow: hidden;
  transform-origin: 50% 120%;
  transition: transform 0.45s var(--ease-out), opacity 0.35s, left 0.4s var(--ease-out), top 0.4s var(--ease-out), width 0.4s var(--ease-out), height 0.4s var(--ease-out), border-radius 0.4s;
}
.browser.max { left: 0; top: 0; width: 100%; height: calc(100% - 34px); border-radius: 0; }
.browser.min { transform: translateY(80%) scale(0.12); opacity: 0; }
.browser.closed { transform: scale(0.94); opacity: 0; }
.tabs { display: flex; gap: 2px; padding: 8px 8px 0; background: color-mix(in srgb, var(--ink) 6%, var(--surface)); min-height: 38px; }
.tab {
  font-size: 12px; padding: 6px 12px; border-radius: 8px 8px 0 0; color: var(--muted);
  max-width: 150px; min-width: 0; flex: 0 1 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  animation: tab-in 0.3s var(--ease-out);
}
.tab.cur { background: var(--surface); color: var(--ink); }
.tab.out { animation: tab-out 0.25s var(--ease-out) forwards; }
@keyframes tab-in { from { flex-basis: 0; opacity: 0; } }
@keyframes tab-out { to { flex-basis: 0; padding: 6px 0; opacity: 0; } }
.addr { display: flex; align-items: center; gap: 10px; padding: 7px 12px; border-bottom: 1px solid var(--rule); font-size: 12px; color: var(--muted); }
.addr .nb { display: flex; gap: 6px; }
.addr .nb i { width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; font-style: normal; font-size: 12px; transition: background 0.2s, color 0.2s; }
.addr .nb i.flash { background: var(--trail-soft); color: var(--trail-ink); }
.addr .url { flex: 1; background: color-mix(in srgb, var(--ink) 5%, transparent); border-radius: 999px; padding: 4px 12px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; position: relative; }
.addr .url::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--trail); }
.addr .url.loading::after { animation: load 0.6s var(--ease-out); }
@keyframes load { from { width: 0; opacity: 1; } 80% { width: 100%; opacity: 1; } to { width: 100%; opacity: 0; } }
.view { flex: 1; position: relative; overflow: hidden; }
.page { position: absolute; inset: 0; padding: 18px 22px; transition: transform 0.4s var(--ease-out), opacity 0.3s; }
.page .scroller { transition: transform 0.6s var(--ease-out); }
.page h3 { margin: 0 0 10px; font-size: 18px; letter-spacing: -0.01em; }
.page .bar { height: 9px; border-radius: 5px; background: color-mix(in srgb, var(--ink) 9%, transparent); margin: 8px 0; }
.page .blk { height: 64px; border-radius: 10px; margin: 14px 0; }
.page.enter-l { transform: translateX(-30%); opacity: 0; }
.page.enter-r { transform: translateX(30%); opacity: 0; }
.page.leave-l { transform: translateX(-30%); opacity: 0; }
.page.leave-r { transform: translateX(30%); opacity: 0; }
.taskbar {
  position: absolute; left: 0; right: 0; bottom: 0; height: 34px; z-index: 2;
  background: color-mix(in srgb, var(--surface) 78%, transparent); backdrop-filter: blur(8px);
  display: flex; justify-content: center; align-items: center; gap: 8px; border-top: 1px solid var(--rule);
}
.taskbar i { width: 18px; height: 18px; border-radius: 5px; background: color-mix(in srgb, var(--ink) 14%, transparent); }
.taskbar i.app { background: var(--trail); position: relative; }
.taskbar i.app::after { content: ""; position: absolute; left: 5px; right: 5px; bottom: -5px; height: 2px; border-radius: 2px; background: var(--trail); }
.taskbar i.bounce { animation: bounce 0.5s var(--ease-spring); }
@keyframes bounce { 40% { transform: translateY(-6px); } }
.toast {
  position: absolute; right: 14px; top: 14px; z-index: 6; font-size: 13px;
  background: var(--surface); border: 1px solid var(--rule); border-radius: 10px; padding: 7px 12px;
  box-shadow: var(--shadow-win); opacity: 0; transform: translateY(-6px); transition: opacity 0.2s, transform 0.3s var(--ease-out);
  pointer-events: none;
}
.toast.on { opacity: 1; transform: none; }

/* 手势速查条（首屏下方） */
.try { display: flex; flex-wrap: wrap; gap: 6px 8px; margin-top: 14px; padding: 0; list-style: none; }
.try button {
  font: 500 14px/1 var(--font); color: var(--ink-2); background: transparent; border: 1px solid var(--rule);
  border-radius: 999px; padding: 7px 12px 7px 10px; cursor: pointer; display: flex; gap: 6px; align-items: center;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.try button b { font-weight: 600; color: var(--trail-ink); letter-spacing: 0.04em; }
.try button:hover, .try button.hit { border-color: var(--trail); background: var(--trail-soft); color: var(--ink); }

/* ---------- 章节 ---------- */
section.sec { padding: clamp(64px, 9vw, 120px) 0 0; }
.sec-head { max-width: 40em; margin-bottom: 40px; }
.sec h2 { font-size: clamp(32px, 4vw, 52px); line-height: 1.08; letter-spacing: -0.03em; font-weight: 800; margin: 0 0 16px; }
.sec-head p { color: var(--ink-2); margin: 0; font-size: 18px; }

/* 手势表：三列，行而不是卡片 */
.sheet { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 clamp(20px, 3vw, 48px); }
.sheet h3 { font-size: 15px; font-weight: 600; color: var(--muted); margin: 0; padding: 0 0 10px; border-bottom: 1px solid var(--ink); }
.sheet ul { list-style: none; margin: 0 0 32px; padding: 0; }
.sheet li { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; align-items: center; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--rule); }
.sheet li .glyph { width: 44px; height: 44px; border-radius: 10px; background: var(--surface); display: grid; place-items: center; }
.sheet li .glyph svg { width: 30px; height: 30px; overflow: visible; }
.glyph path { fill: none; stroke: var(--trail); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.glyph circle { fill: var(--trail); }
.sheet li:hover .glyph path { animation: redraw 0.7s var(--ease-out); }
@keyframes redraw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
.glyph path { stroke-dasharray: 1; stroke-dashoffset: 0; }
.sheet li .nm { font-weight: 600; }
.sheet li .nm small { display: block; font-weight: 400; color: var(--muted); font-size: 14px; line-height: 1.4; }
.sheet li .ar { color: var(--muted); font-size: 15px; letter-spacing: 0.06em; white-space: nowrap; }
.sheet li .ar kbd { font: 500 12px/1 var(--font); border: 1px solid var(--rule); border-bottom-width: 2px; border-radius: 5px; padding: 2px 5px; color: var(--ink-2); letter-spacing: 0; }
@media (max-width: 900px) { .sheet { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .sheet { grid-template-columns: 1fr; } }
.note { color: var(--muted); font-size: 15px; max-width: 46em; }

/* 触发角：模拟屏幕 */
.edges { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.monitor { position: relative; }
.screen {
  position: relative; aspect-ratio: 16 / 10; border-radius: 10px; overflow: hidden;
  background: linear-gradient(160deg, color-mix(in srgb, var(--desk) 90%, #4a6a8f), var(--desk));
  border: 10px solid #151a22; box-shadow: var(--shadow-win); cursor: default; touch-action: none;
}
.monitor::after { content: ""; display: block; width: 22%; height: 18px; margin: 0 auto; background: linear-gradient(#151a22, #252c37); clip-path: polygon(14% 0, 86% 0, 100% 100%, 0 100%); }
.screen .win {
  position: absolute; background: var(--surface); border-radius: 7px; box-shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.5);
  transition: transform 0.5s var(--ease-out), opacity 0.35s, filter 0.4s;
}
.screen .win::before { content: ""; display: block; height: 14px; background: color-mix(in srgb, var(--ink) 7%, var(--surface)); border-radius: 7px 7px 0 0; }
.screen .w1 { left: 8%; top: 9%; width: 52%; height: 58%; }
.screen .w2 { left: 38%; top: 24%; width: 48%; height: 54%; }
.screen.desktop .w1 { transform: translate(-120%, 40%) scale(0.6); opacity: 0; }
.screen.desktop .w2 { transform: translate(120%, 40%) scale(0.6); opacity: 0; }
.screen.swap .w1 { z-index: 2; }
.screen.tasks .w1 { transform: translate(-6%, 8%) scale(0.62); }
.screen.tasks .w2 { transform: translate(6%, -16%) scale(0.62); }
.screen.tasks .win { filter: drop-shadow(0 0 0 2px var(--trail)); }
.screen .tbar { position: absolute; left: 0; right: 0; bottom: 0; height: 8%; background: rgba(20, 26, 36, 0.72); display: flex; justify-content: center; align-items: center; gap: 2%; }
.screen .tbar i { width: 3.2%; aspect-ratio: 1; border-radius: 3px; background: rgba(255, 255, 255, 0.28); }
.screen .tbar i:first-child { background: var(--trail); }
.screen .start {
  position: absolute; left: 3%; bottom: 10%; width: 38%; height: 60%; border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(10px);
  transform: translateY(30%); opacity: 0; transition: transform 0.45s var(--ease-spring), opacity 0.25s;
  padding: 4%; display: grid; grid-template-columns: repeat(4, 1fr); gap: 6%; align-content: start;
}
.screen .start i { aspect-ratio: 1; border-radius: 22%; background: color-mix(in srgb, var(--trail) 30%, var(--surface)); }
.screen.start-open .start { transform: none; opacity: 1; }
.screen .osd {
  position: absolute; left: 50%; top: 8%; transform: translate(-50%, -20px); opacity: 0;
  background: rgba(20, 26, 36, 0.86); color: #fff; border-radius: 10px; padding: 8px 14px; font-size: 13px;
  display: flex; align-items: center; gap: 10px; transition: opacity 0.2s, transform 0.3s var(--ease-out); white-space: nowrap;
}
.screen .osd.bottom { top: auto; bottom: 12%; transform: translate(-50%, 20px); }
.screen .osd.on { opacity: 1; transform: translate(-50%, 0); }
.screen .osd .lvl { width: 90px; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, 0.25); overflow: hidden; }
.screen .osd .lvl b { display: block; height: 100%; background: var(--trail); transition: width 0.15s; }
.screen .dim { position: absolute; inset: 0; background: #000; opacity: 0; pointer-events: none; transition: opacity 0.2s; }
.screen .tm {
  position: absolute; right: 8%; top: 14%; width: 34%; height: 52%; background: var(--surface); border-radius: 7px;
  box-shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.6); transform: scale(0.9); opacity: 0; transition: transform 0.35s var(--ease-spring), opacity 0.2s;
  padding: 18px 8% 0; font-size: 11px; color: var(--muted);
}
.screen .tm .bar { height: 6px; margin: 8px 0; border-radius: 3px; background: color-mix(in srgb, var(--trail) 40%, transparent); }
.screen .tm.on { transform: none; opacity: 1; }
.screen .glow { position: absolute; pointer-events: none; opacity: 0; transition: opacity 0.2s; background: var(--trail); box-shadow: 0 0 16px 3px var(--trail); z-index: 4; }
.screen .glow.on { opacity: 0.95; }
.screen .glow.e1 { left: 0; right: 0; top: 0; height: 3px; }
.screen .glow.e4 { left: 0; right: 0; bottom: 0; height: 3px; }
.screen .glow.e2 { top: 0; bottom: 0; right: 0; width: 3px; }
.screen .glow.e8 { top: 0; bottom: 0; left: 0; width: 3px; }
.screen .glow.c { width: 26px; height: 26px; border-radius: 50%; }
.screen .glow.c9 { left: -13px; top: -13px; } .screen .glow.c3 { right: -13px; top: -13px; }
.screen .glow.c12 { left: -13px; bottom: -13px; } .screen .glow.c6 { right: -13px; bottom: -13px; }
.screen .cur { position: absolute; width: 14px; height: 20px; pointer-events: none; z-index: 5; left: 50%; top: 50%; transform: translate(-1px, -1px); }
.screen .label { position: absolute; left: 50%; bottom: 14%; z-index: 6; transform: translateX(-50%) translateY(6px); opacity: 0; background: var(--pill); color: var(--pill-ink); font-size: 14px; font-weight: 600; padding: 6px 14px; border-radius: 999px; white-space: nowrap; transition: opacity 0.18s, transform 0.25s var(--ease-spring); }
.screen .label.on { opacity: 1; transform: translateX(-50%); }
.rules { list-style: none; margin: 0; padding: 0; }
.rules li { border-bottom: 1px solid var(--rule); }
.rules button {
  width: 100%; text-align: left; background: none; border: 0; padding: 13px 4px; cursor: pointer; font: inherit; color: inherit;
  display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 14px; align-items: baseline; border-radius: 6px; transition: background 0.2s;
}
.rules button:hover, .rules button.hit { background: var(--trail-soft); }
.rules .where { color: var(--muted); font-size: 14px; }
.rules .what { font-weight: 600; }
.rules .what small { font-weight: 400; color: var(--muted); display: block; font-size: 14px; }
@media (max-width: 900px) { .edges { grid-template-columns: 1fr; } }

/* 八种动作：定义列表，两列 */
.acts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(24px, 4vw, 64px); margin: 0; }
.acts > div { display: grid; grid-template-columns: 40px minmax(0, 1fr); grid-template-rows: auto 1fr; align-content: start; gap: 4px 16px; padding: 20px 0; border-top: 1px solid var(--rule); }
.acts dt { font-weight: 700; font-size: 19px; grid-column: 2; }
.acts dd { margin: 0; grid-column: 2; color: var(--ink-2); }
.acts dd code { font: 500 14px/1.4 "Cascadia Code", Consolas, monospace; background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 1px 6px; color: var(--ink); white-space: nowrap; }
.acts .ico { grid-row: 1 / span 2; width: 40px; height: 40px; border-radius: 10px; background: var(--trail-soft); color: var(--trail-ink); display: grid; place-items: center; }
.acts .ico svg { width: 22px; height: 22px; }
@media (max-width: 760px) { .acts { grid-template-columns: 1fr; } }

/* 不打扰：程序开关 */
.quiet { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); align-items: start; }
.apps { background: var(--surface); border-radius: 16px; padding: 8px 0; box-shadow: var(--shadow-win); }
.apps .row { display: flex; align-items: center; gap: 14px; padding: 11px 20px; }
.apps .row + .row { border-top: 1px solid var(--rule); }
.apps .ai { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 13px; flex: none; }
.apps .an { flex: 1; min-width: 0; }
.apps .an b { display: block; font-weight: 600; }
.apps .an small { color: var(--muted); font-size: 13px; }
.apps .state { font-size: 13px; color: var(--muted); min-width: 4.5em; text-align: right; transition: color 0.2s; }
.apps .row.off .state { color: var(--ink); }
.sw { appearance: none; -webkit-appearance: none; width: 40px; height: 24px; border-radius: 999px; background: color-mix(in srgb, var(--ink) 18%, transparent); position: relative; cursor: pointer; transition: background 0.25s; flex: none; margin: 0; }
.sw::after { content: ""; position: absolute; left: 3px; top: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); transition: transform 0.3s var(--ease-spring); }
.sw:checked { background: var(--trail); }
.sw:checked::after { transform: translateX(16px); }
.points { list-style: none; margin: 0; padding: 0; }
.points li { padding: 18px 0; border-top: 1px solid var(--rule); }
.points li b { display: block; font-size: 19px; margin-bottom: 4px; }
.points li span { color: var(--ink-2); }
.points kbd { font: 600 13px/1 var(--font); border: 1px solid var(--rule); border-bottom-width: 2px; border-radius: 6px; padding: 3px 7px; background: var(--surface); }
@media (max-width: 900px) { .quiet { grid-template-columns: 1fr; } }

/* 轻：内存条 */
.light { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: clamp(24px, 4vw, 64px); align-items: center; }
.figs { display: grid; gap: 28px; margin: 0; }
.figs div { border-top: 1px solid var(--ink); padding-top: 12px; }
.figs dt { color: var(--muted); font-size: 15px; }
.figs dd { margin: 0; font-size: clamp(36px, 4.6vw, 56px); font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; }
.figs dd small { font-size: 0.42em; font-weight: 600; letter-spacing: 0; margin-left: 4px; }
.figs p { margin: 4px 0 0; color: var(--ink-2); font-size: 15px; }
.proc { background: var(--surface); border-radius: 16px; padding: 18px 20px 20px; box-shadow: var(--shadow-win); font-size: 14px; }
.proc .ph { display: flex; justify-content: space-between; color: var(--muted); padding-bottom: 8px; border-bottom: 1px solid var(--rule); }
.proc .pr { display: grid; grid-template-columns: minmax(0, 1fr) 70px; gap: 12px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--rule); transition: opacity 0.4s; }
.proc .pr span { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.proc .pr .m { text-align: right; font-variant-numeric: tabular-nums; }
.proc .meter { grid-column: 1 / -1; height: 6px; border-radius: 3px; background: color-mix(in srgb, var(--ink) 8%, transparent); overflow: hidden; }
.proc .meter b { display: block; height: 100%; width: 0; background: var(--trail); border-radius: 3px; transition: width 1s var(--ease-out); }
.proc .pr.webview { opacity: 0.35; }
.proc .pr.webview.on { opacity: 1; }
.proc .pr.webview .meter b { background: color-mix(in srgb, var(--ink) 35%, transparent); }
.proc .pt { display: flex; gap: 10px; align-items: center; margin-top: 14px; color: var(--ink-2); }
@media (max-width: 900px) { .light { grid-template-columns: 1fr; } }

/* 常见问题 */
.faq { max-width: 820px; }
.faq details { border-top: 1px solid var(--rule); }
.faq details:last-child { border-bottom: 1px solid var(--rule); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 40px 20px 0; font-weight: 600; font-size: 19px; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 8px; top: 50%; width: 12px; height: 12px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: translateY(-75%) rotate(45deg); transition: transform 0.3s var(--ease-out); }
.faq details[open] summary::after { transform: translateY(-25%) rotate(-135deg); }
.faq .ans { padding: 0 0 22px; color: var(--ink-2); max-width: 44em; }
.faq details[open] .ans { animation: open 0.35s var(--ease-out); }
@keyframes open { from { opacity: 0; transform: translateY(-6px); } }
.faq .ans p { margin: 0 0 10px; }

/* 下载 */
.get { margin: clamp(72px, 10vw, 140px) 0 0; padding: clamp(48px, 7vw, 88px) 0; background: var(--ink); color: var(--bg); position: relative; overflow: hidden; }
.get canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.get .wrap { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; align-items: end; }
.get h2 { font-size: clamp(36px, 5vw, 64px); line-height: 1.04; letter-spacing: -0.035em; margin: 0 0 14px; font-weight: 800; }
.get p { margin: 0; color: color-mix(in srgb, var(--bg) 72%, transparent); max-width: 36em; }
.get .btn.primary { background: var(--trail); border-color: var(--trail); color: #fff; }
.get .sys { font-size: 14px; margin-top: 10px; color: color-mix(in srgb, var(--bg) 60%, transparent); text-align: right; }
@media (max-width: 760px) { .get .wrap { grid-template-columns: 1fr; } .get .sys { text-align: left; } }
footer { padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer a { color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-delay: 0s !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
}

/* =====================================================================
   动效层：只有 html.js 时才生效，脚本没跑时页面保持完整可读。
   ===================================================================== */
:root { interpolate-size: allow-keywords; }
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vt-out 0.32s var(--ease-out) both; }
::view-transition-new(root) { animation: vt-in 0.55s var(--ease-out) both; }
@keyframes vt-out { to { opacity: 0; transform: translateY(-14px) scale(0.99); } }
@keyframes vt-in { from { opacity: 0; transform: translateY(18px); } }
body { position: relative; }

/* 首屏入场：标题逐词从遮罩里升起 */
.js .hero h1 .wm { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.1em; margin-bottom: -0.1em; }
.js .hero h1 .w { display: inline-block; transform: translateY(110%) rotate(4deg); transform-origin: 0 100%; animation: rise 1s var(--ease-out) forwards; animation-delay: calc(120ms + var(--i) * 70ms); }
@keyframes rise { to { transform: none; } }
.js .hero .lede, .js .hero .cta, .js .hero .meta, .js .hero .try { opacity: 0; transform: translateY(16px); animation: up 0.9s var(--ease-out) forwards; }
.js .hero .lede { animation-delay: 0.45s; }
.js .hero .cta { animation-delay: 0.58s; }
.js .hero .meta { animation-delay: 0.7s; }
.js .hero .try { animation-delay: 1.15s; }
@keyframes up { to { opacity: 1; transform: none; } }
.js .stage { opacity: 0; transform: perspective(1400px) translateY(40px) rotateX(10deg) scale(0.96); animation: land 1.2s 0.3s var(--ease-out) forwards; transform-origin: 50% 100%; }
@keyframes land { to { opacity: 1; transform: none; } }
.browser { translate: var(--px, 0) var(--py, 0); transition: transform 0.45s var(--ease-out), opacity 0.35s, left 0.4s var(--ease-out), top 0.4s var(--ease-out), width 0.4s var(--ease-out), height 0.4s var(--ease-out), border-radius 0.4s, translate 0.6s var(--ease-out); }
.stage { background-position: calc(var(--px, 0) * -0.5) calc(var(--py, 0) * -0.5), 0 0; }

/* 通用出场：.rv 由脚本挂上，进入视野加 .in */
.js .rv { opacity: 0; transform: translateY(28px); transition: opacity 0.8s var(--ease-out), transform 1s var(--ease-out); transition-delay: calc(var(--i, 0) * 55ms); }
.js .rv.in { opacity: 1; transform: none; }
.js .rv.from-l { transform: translateX(-36px); }
.js .rv.from-r { transform: translateX(36px); }
.js .rv.zoom { transform: perspective(1200px) translateY(50px) rotateX(12deg) scale(0.95); transform-origin: 50% 100%; transition-duration: 0.9s, 1.2s; }
.js .rv.in.from-l, .js .rv.in.from-r, .js .rv.in.zoom { transform: none; }
/* 章节标题：逐行遮罩 */
.js .sec h2 .ln, .js .get h2 .ln { display: block; overflow: hidden; padding-bottom: 0.08em; margin-bottom: -0.08em; }
.js .sec h2 .ln > span, .js .get h2 .ln > span { display: inline-block; transform: translateY(105%); transition: transform 1.1s var(--ease-out); transition-delay: calc(var(--i, 0) * 90ms); }
.js .sec h2.in .ln > span, .js .get h2.in .ln > span { transform: none; }
/* 手势小图依次画出 */
.js .sheet .glyph path { stroke-dashoffset: 1; transition: stroke-dashoffset 0.7s var(--ease-out); transition-delay: calc(var(--i, 0) * 55ms + 250ms); }
.js .sheet .glyph circle { transform: scale(0); transform-origin: center; transform-box: fill-box; transition: transform 0.4s var(--ease-spring); transition-delay: calc(var(--i, 0) * 55ms + 200ms); }
.js .sheet li.in .glyph path { stroke-dashoffset: 0; }
.js .sheet li.in .glyph circle { transform: none; }
.sheet li { position: relative; isolation: isolate; }
.sheet li::before { content: ""; position: absolute; inset: 3px -10px; border-radius: 12px; z-index: -1; background: color-mix(in srgb, var(--surface) 60%, transparent); opacity: 0; transform: scale(0.97); transition: opacity 0.25s, transform 0.35s var(--ease-out); }
.sheet li:hover::before { opacity: 1; transform: none; }
.sheet li .glyph { transition: transform 0.35s var(--ease-spring), box-shadow 0.3s; }
.sheet li:hover .glyph { transform: scale(1.08) rotate(-3deg); box-shadow: 0 8px 20px -10px var(--trail); }
.acts .ico { transition: transform 0.4s var(--ease-spring); }
.acts > div:hover .ico { transform: translateY(-3px) rotate(-6deg); }

/* 贯穿全页的轨迹线 */
.spine { position: absolute; left: 0; top: 0; width: 100%; pointer-events: none; z-index: 1; overflow: visible; }
.spine .rail { stroke: var(--rule); stroke-width: 2; fill: none; }
.spine .ink { stroke: var(--trail); stroke-width: 3; fill: none; stroke-linecap: round; }
.spine .br { stroke: var(--trail); stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 0.7s var(--ease-out); }
.spine .br.on { stroke-dashoffset: 0; }
.spine .node { fill: var(--bg); stroke: var(--rule); stroke-width: 2; transition: fill 0.3s, stroke 0.3s; }
.spine .node.on { fill: var(--trail); stroke: var(--trail); }
.spine .tip { fill: var(--trail); filter: drop-shadow(0 0 6px var(--trail)); }
@media (max-width: 1239px) { .spine { display: none; } }

/* 顶部进度 + 右侧章节导轨 */
.progress { position: fixed; left: 0; top: 0; height: 2px; width: 100%; background: var(--trail); transform-origin: 0 50%; transform: scaleX(var(--p, 0)); z-index: 70; pointer-events: none; }
.dots { position: fixed; right: 18px; top: 50%; transform: translateY(-50%); z-index: 40; display: flex; flex-direction: column; gap: 6px; margin: 0; padding: 0; list-style: none; }
.dots a { display: flex; align-items: center; justify-content: flex-end; gap: 10px; height: 22px; text-decoration: none; color: var(--muted); font-size: 13px; }
.dots a span { opacity: 0; transform: translateX(8px); transition: opacity 0.25s, transform 0.3s var(--ease-out); background: var(--surface); padding: 3px 9px; border-radius: 999px; box-shadow: var(--shadow-win); white-space: nowrap; }
.dots a i { width: 8px; height: 8px; border-radius: 50%; background: color-mix(in srgb, var(--ink) 25%, transparent); transition: height 0.35s var(--ease-spring), background 0.3s; flex: none; }
.dots a:hover span, .dots a:focus-visible span { opacity: 1; transform: none; }
.dots a.cur i { height: 22px; border-radius: 4px; background: var(--trail); }
.dots.on-dark a i { background: rgba(255, 255, 255, 0.35); }
.dots.on-dark a.cur i { background: var(--trail); }
@media (max-width: 1100px) { .dots { display: none; } }

/* 全页手势：固定画布 + 名称胶囊 */
.pagecanvas { position: fixed; inset: 0; width: 100vw; height: 100vh; pointer-events: none; z-index: 80; }
.ppill { position: fixed; bottom: 12vh; z-index: 81; }
.phint {
  position: fixed; left: 20px; bottom: 20px; z-index: 45; max-width: min(360px, calc(100vw - 40px));
  display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px 12px 16px; border-radius: 14px;
  background: var(--pill); color: var(--pill-ink); font-size: 14px; line-height: 1.5; box-shadow: 0 16px 40px -14px rgba(0, 0, 0, 0.5);
  opacity: 0; transform: translateY(20px) scale(0.96); pointer-events: none; transition: opacity 0.3s, transform 0.5s var(--ease-spring);
}
.phint.on { opacity: 1; transform: none; pointer-events: auto; }
.phint b { color: var(--trail); font-weight: 700; letter-spacing: 0.04em; }
.phint button { background: none; border: 0; color: inherit; opacity: 0.6; cursor: pointer; font-size: 18px; line-height: 1; padding: 0 2px; }
.phint button:hover { opacity: 1; }
@media (hover: none) { .phint { display: none; } }

/* 下载区：入场时画一笔大轨迹 */
.get .big { position: absolute; right: -4%; top: -10%; width: 62%; height: 130%; pointer-events: none; overflow: visible; }
.get .big path { fill: none; stroke: var(--trail); stroke-width: 26; stroke-linecap: round; stroke-linejoin: round; opacity: 0.22; stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 1.8s var(--ease-out); }
.get .big circle { fill: var(--trail); opacity: 0; transition: opacity 0.4s 0.1s; }
.get.in .big path { stroke-dashoffset: 0; }
.get.in .big circle { opacity: 0.35; }

/* FAQ 真实高度动画（支持 ::details-content 的浏览器） */
.faq details::details-content { block-size: 0; overflow: clip; transition: block-size 0.45s var(--ease-out), content-visibility 0.45s allow-discrete; }
.faq details[open]::details-content { block-size: auto; }
.faq summary { transition: color 0.2s, padding-left 0.3s var(--ease-out); }
.faq summary:hover { color: var(--trail-ink); padding-left: 6px; }

@media (prefers-reduced-motion: reduce) {
  .js .cue, .js .rv, .js .stage, .js .hero .lede, .js .hero .cta, .js .hero .meta, .js .hero .try { opacity: 1 !important; transform: none !important; }
  .js .hero h1 .w, .js .sec h2 .ln > span, .js .get h2 .ln > span { transform: none !important; }
  .js .sheet .glyph path { stroke-dashoffset: 0; }
  .js .sheet .glyph circle { transform: none; }
  .spine, .phint { display: none; }
}

/* ---------- 语言菜单（原生 details，无 JS） ---------- */
.langmenu { position: relative; }
.langmenu summary { list-style: none; cursor: pointer; font-size: 14px; color: var(--muted); padding: 6px 8px; white-space: nowrap; user-select: none; }
.langmenu summary::-webkit-details-marker { display: none; }
.langmenu summary:hover { color: var(--ink); }
.langmenu[open] summary { color: var(--ink); }
.langdrop { position: absolute; right: 0; top: calc(100% + 8px); z-index: 60; display: grid; background: var(--surface); border: 1px solid var(--rule); border-radius: 12px; box-shadow: 0 14px 36px rgba(0,0,0,.16); padding: 6px; min-width: 190px; }
.langdrop a { padding: 8px 12px; font-size: 14px; color: var(--muted); text-decoration: none; border-radius: 8px; white-space: nowrap; }
.langdrop a:hover { background: var(--bg); color: var(--ink); }
.langdrop a.cur { color: var(--accent, #7c3aed); font-weight: 600; }
@media (max-width: 860px) { .top .langmenu { margin-left: auto; } }