:root {
  --bg: #f7f8fb; --bg-elev: #ffffff; --bg-sunk: #eef1f6; --border: #dde2ec; --border-strong: #c5cddc;
  --text: #1d2433; --text-2: #4a5468; --text-3: #7a849a;
  --accent: #3b7ab0; --accent-2: #478cbf; --accent-soft: #e3eef8;
  --ok: #2e8b57; --ok-soft: #e1f3e8; --bad: #c0392b; --bad-soft: #fbe6e3; --warn: #b7791f; --warn-soft: #fbf0dc;
  --code-bg: #f3f5f9; --code-text: #24292f;
  --tk-kw: #c2185b; --tk-type: #1565c0; --tk-str: #2e7d32; --tk-num: #b85c00; --tk-com: #8a94a6;
  --tk-fn: #6a3fb5; --tk-ann: #b35900; --tk-node: #00838f;
  --shadow: 0 1px 2px rgba(20,30,50,.06), 0 4px 16px rgba(20,30,50,.06);
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161a23; --bg-elev: #1e2330; --bg-sunk: #12151d; --border: #2c3344; --border-strong: #3c4558;
    --text: #e4e8f1; --text-2: #b0b9cc; --text-3: #7f8aa1;
    --accent: #6fb0e6; --accent-2: #478cbf; --accent-soft: #1d3247;
    --ok: #5cc98a; --ok-soft: #173326; --bad: #ff8a80; --bad-soft: #3a1d1d; --warn: #f0b75a; --warn-soft: #3a2d14;
    --code-bg: #12151d; --code-text: #d8dee9;
    --tk-kw: #ff7ab2; --tk-type: #6cb6ff; --tk-str: #8fd08f; --tk-num: #f8b26a; --tk-com: #6b778d;
    --tk-fn: #c4a7ff; --tk-ann: #ffb86b; --tk-node: #5ed4dc;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #161a23; --bg-elev: #1e2330; --bg-sunk: #12151d; --border: #2c3344; --border-strong: #3c4558;
  --text: #e4e8f1; --text-2: #b0b9cc; --text-3: #7f8aa1;
  --accent: #6fb0e6; --accent-2: #478cbf; --accent-soft: #1d3247;
  --ok: #5cc98a; --ok-soft: #173326; --bad: #ff8a80; --bad-soft: #3a1d1d; --warn: #f0b75a; --warn-soft: #3a2d14;
  --code-bg: #12151d; --code-text: #d8dee9;
  --tk-kw: #ff7ab2; --tk-type: #6cb6ff; --tk-str: #8fd08f; --tk-num: #f8b26a; --tk-com: #6b778d;
  --tk-fn: #c4a7ff; --tk-ann: #ffb86b; --tk-node: #5ed4dc;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.75 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, pre { font-family: var(--mono); }
:not(pre) > code { font-size: .88em; background: var(--bg-sunk); border: 1px solid var(--border); border-radius: 4px; padding: .05em .35em; }
kbd { font-size: .82em; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0 .4em; background: var(--bg-elev); }
button { font: inherit; color: inherit; }

/* ---------- 顶栏 + 侧栏 ---------- */
.topbar { position: sticky; top: 0; z-index: 30; height: 56px; display: flex; align-items: center; gap: 16px;
  padding: 0 20px; background: color-mix(in srgb, var(--bg-elev) 88%, transparent); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; font-size: 16px; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; }
.top-links { display: flex; gap: 18px; margin-left: 12px; font-size: 14px; }
.top-links a { color: var(--text-2); }
.ver { margin-left: auto; font: 12px var(--mono); color: var(--text-3); border: 1px solid var(--border); border-radius: 20px; padding: 2px 10px; }
.theme-btn, .menu-btn { background: none; border: 1px solid var(--border); border-radius: 8px; width: 34px; height: 34px; cursor: pointer; }
.menu-btn { display: none; }
.layout { display: grid; grid-template-columns: 272px minmax(0, 1fr); }
.sidebar { border-right: 1px solid var(--border); background: var(--bg-elev); }
.sidebar-inner { position: sticky; top: 56px; max-height: calc(100vh - 56px); overflow-y: auto; padding: 18px 12px 40px; font-size: 14px; }
.nav-part { font-size: 12px; font-weight: 650; color: var(--text-3); letter-spacing: .04em; margin: 18px 10px 6px; }
.nav-part:first-child { margin-top: 0; }
.sidebar ol { list-style: none; margin: 0; padding: 0; }
.sidebar li a { display: flex; gap: 10px; padding: 6px 10px; border-radius: 7px; color: var(--text-2); line-height: 1.45; }
.sidebar li a:hover { background: var(--bg-sunk); text-decoration: none; }
.sidebar li.active a { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-num { font: 12px/1.9 var(--mono); color: var(--text-3); min-width: 18px; }
.content { min-width: 0; padding: 40px 48px 80px; }
.chapter, .demo-page { max-width: 820px; margin: 0 auto; }
.wide-page .demo-page { max-width: 1180px; }
.site-foot { max-width: 820px; margin: 64px auto 0; padding-top: 20px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-3); }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
  .menu-btn { display: block; }
  .top-links { display: none; }
  .sidebar { position: fixed; z-index: 25; top: 56px; bottom: 0; left: 0; width: 280px; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  .nav-open .sidebar { transform: none; }
  .content { padding: 28px 16px 60px; }
}

/* ---------- 正文排版 ---------- */
.chapter-head { margin-bottom: 32px; }
.eyebrow { font-size: 13px; font-weight: 600; color: var(--accent); letter-spacing: .03em; }
h1 { font-size: 34px; line-height: 1.3; margin: 6px 0 10px; letter-spacing: -.01em; }
.lede { font-size: 18px; color: var(--text-2); margin: 0; }
.chapter h2, .demo-page h2 { font-size: 24px; margin: 48px 0 12px; padding-top: 8px; line-height: 1.4; }
.chapter h3 { font-size: 19px; margin: 32px 0 8px; }
.chapter p, .chapter li { color: var(--text); }
.chapter ul, .chapter ol { padding-left: 1.4em; }
.chapter li { margin: 4px 0; }
.chapter table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14.5px; }
.chapter th, .chapter td { border: 1px solid var(--border); padding: 7px 12px; text-align: left; vertical-align: top; }
.chapter th { background: var(--bg-sunk); font-weight: 600; }
.chapter img { max-width: 100%; border-radius: var(--radius); }
.chapter hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }

.note, .tip, .warn, .try { border-radius: var(--radius); padding: 14px 18px 14px 18px; margin: 20px 0; border: 1px solid; }
.note > :first-child, .tip > :first-child, .warn > :first-child, .try > :first-child { margin-top: 0; }
.note > :last-child, .tip > :last-child, .warn > :last-child, .try > :last-child { margin-bottom: 0; }
.note::before, .tip::before, .warn::before, .try::before { display: block; font-weight: 650; font-size: 14px; margin-bottom: 4px; }
.note { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 30%, transparent); }
.note::before { content: "说明"; color: var(--accent); }
.tip { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.tip::before { content: "技巧"; color: var(--ok); }
.warn { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.warn::before { content: "注意"; color: var(--warn); }
.try { background: var(--bg-elev); border-color: var(--accent-2); border-left-width: 4px; }
.try::before { content: "▶ 动手试试"; color: var(--accent); }

/* ---------- 代码块 ---------- */
.codeblock { margin: 20px 0; border: 1px solid var(--border); border-radius: var(--radius); background: var(--code-bg); overflow: hidden; }
.code-head { display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; padding: 7px 14px; border-bottom: 1px solid var(--border);
  background: var(--bg-sunk); font-size: 12.5px; color: var(--text-3); }
.code-file { font-family: var(--mono); color: var(--text-2); font-weight: 600; }
.code-cap { color: var(--text-2); }
.code-open { margin-left: auto; }
.codeblock pre, pre.plain { margin: 0; padding: 12px 0; overflow-x: auto; font-size: 13.5px; line-height: 1.6; color: var(--code-text); tab-size: 4; }
pre.plain { padding: 12px 16px; background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius); margin: 20px 0; }
.codeblock code { display: block; min-width: max-content; }
.codeblock .ln { display: block; padding: 0 16px 0 0; }
.codeblock .ln::before { content: attr(data-n); display: inline-block; width: 3.2em; padding-right: 1em; text-align: right; color: var(--text-3); opacity: .6; user-select: none; }
.codeblock .ln.hl { background: color-mix(in srgb, var(--accent-2) 16%, transparent); }
.tk-kw { color: var(--tk-kw); } .tk-type { color: var(--tk-type); } .tk-str { color: var(--tk-str); } .tk-num { color: var(--tk-num); }
.tk-com { color: var(--tk-com); font-style: italic; } .tk-fn { color: var(--tk-fn); } .tk-ann { color: var(--tk-ann); } .tk-node { color: var(--tk-node); }
.copy-btn { margin-left: 8px; background: none; border: 1px solid var(--border); border-radius: 5px; font-size: 12px; padding: 0 7px; cursor: pointer; color: var(--text-2); }

/* ---------- 可运行示例 ---------- */
.godot-demo { margin: 28px 0; border: 1px solid var(--border); border-radius: 14px; background: var(--bg-elev); box-shadow: var(--shadow); overflow: hidden; }
.demo-bar { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.demo-bar b { font-weight: 650; }
.demo-bar .sp { flex: 1; }
.demo-bar a, .demo-bar button { font-size: 13px; }
.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border-strong); background: var(--bg-elev); color: var(--text);
  border-radius: 8px; padding: 5px 12px; cursor: pointer; font-size: 13px; line-height: 1.4; white-space: nowrap; }
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); color: #fff; }
.demo-main { display: grid; grid-template-columns: minmax(0, 1fr); }
.godot-demo.wide .demo-main { grid-template-columns: minmax(0, 1fr) 330px; }
.demo-stage { position: relative; aspect-ratio: 16 / 9; background: #1b202e; }
.demo-stage iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.demo-cover { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  background: #1b202e center / cover no-repeat; cursor: pointer; color: #fff; border: 0; width: 100%; }
.demo-cover::before { content: ""; position: absolute; inset: 0; background: rgba(15, 20, 32, .55); transition: background .2s; }
.demo-cover:hover::before { background: rgba(15, 20, 32, .4); }
.demo-cover .play { position: relative; width: 68px; height: 68px; border-radius: 50%; background: #478cbf; display: grid; place-items: center; box-shadow: 0 6px 24px rgba(0,0,0,.35); }
.demo-cover .play::after { content: ""; border-left: 22px solid #fff; border-top: 13px solid transparent; border-bottom: 13px solid transparent; margin-left: 6px; }
.demo-cover .hint { position: relative; font-size: 13px; opacity: .9; text-shadow: 0 1px 3px rgba(0,0,0,.6); }
.demo-panel { padding: 14px 16px 16px; border-top: 1px solid var(--border); }
.godot-demo.wide .demo-panel { border-top: 0; border-left: 1px solid var(--border); max-height: 0; min-height: 100%; overflow-y: auto; }
.demo-controls { font-size: 13px; color: var(--text-2); margin-bottom: 10px; }
.param-groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 4px 24px; }
.godot-demo.wide .param-groups { grid-template-columns: 1fr; }
.param-group h4 { margin: 8px 0 2px; font-size: 12px; color: var(--text-3); font-weight: 650; letter-spacing: .04em; }
.param { padding: 6px 0; }
.param-top { display: flex; align-items: baseline; gap: 8px; font-size: 13.5px; }
.param-top .name { font-weight: 550; }
.param-top .prop { font: 11.5px var(--mono); color: var(--text-3); }
.param-top output { margin-left: auto; font: 12.5px var(--mono); color: var(--accent); }
.param-top output.changed { font-weight: 700; }
.param input[type=range] { width: 100%; accent-color: var(--accent-2); margin: 4px 0 0; }
.param .desc { font-size: 12px; color: var(--text-3); line-height: 1.5; }
.param.bool label { display: flex; gap: 8px; align-items: center; font-size: 13.5px; cursor: pointer; }
.param select, .param input[type=color] { margin-top: 4px; }
.demo-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.demo-stats { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; min-height: 26px; }
.demo-stats:empty::before { content: "运行后这里会显示实时数据"; font-size: 12px; color: var(--text-3); }
.demo-stats span { font: 12px var(--mono); background: var(--bg-sunk); border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px; }
.demo-stats span b { font-weight: 400; color: var(--text-3); margin-right: 6px; font-family: var(--font); }
.demo-export { margin-top: 12px; }
.demo-export pre { margin: 8px 0 0; padding: 10px 12px; font-size: 12.5px; background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; overflow-x: auto; }
.demo-foot { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--border); }
.demo-foot .muted { font-size: 12px; color: var(--text-3); }
@media (max-width: 960px) {
  .godot-demo.wide .demo-main { grid-template-columns: 1fr; }
  .godot-demo.wide .demo-panel { border-left: 0; border-top: 1px solid var(--border); max-height: none; }
}

/* ---------- 交互小部件 ---------- */
.widget { margin: 24px 0; border: 1px solid var(--border); border-radius: 14px; background: var(--bg-elev); padding: 16px; box-shadow: var(--shadow); }
.widget-title { font-weight: 650; font-size: 15px; margin-bottom: 2px; }
.widget-sub { font-size: 13px; color: var(--text-3); margin-bottom: 10px; }
.widget canvas { display: block; width: 100%; border-radius: 8px; background: var(--bg-sunk); touch-action: none; }
.widget-row { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 12px; align-items: center; }
.widget-row label { display: flex; flex-direction: column; font-size: 13px; color: var(--text-2); min-width: 160px; flex: 1; }
.widget-row label span { display: flex; justify-content: space-between; }
.widget-row label output { font-family: var(--mono); color: var(--accent); }
.widget-row input[type=range] { accent-color: var(--accent-2); }
.widget-out { font: 13px/1.6 var(--mono); background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; margin-top: 10px; white-space: pre-wrap; }
.seg { display: inline-flex; border: 1px solid var(--border-strong); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; background: var(--bg-elev); padding: 4px 12px; cursor: pointer; font-size: 13px; border-right: 1px solid var(--border); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--accent-2); color: #fff; }

/* ---------- 测验 ---------- */
.quiz { margin: 24px 0; border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; background: var(--bg-elev); }
.quiz::before { content: "小测验"; display: block; font-size: 12px; font-weight: 650; color: var(--accent); letter-spacing: .04em; }
.quiz .q { font-weight: 600; margin: 4px 0 10px; }
.quiz ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; counter-reset: q; }
.quiz li { counter-increment: q; border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; cursor: pointer; background: var(--bg); }
.quiz li::before { content: counter(q, upper-alpha) ". "; color: var(--text-3); font-weight: 600; }
.quiz li:hover { border-color: var(--accent); }
.quiz li.right { border-color: var(--ok); background: var(--ok-soft); }
.quiz li.wrong { border-color: var(--bad); background: var(--bad-soft); }
.quiz .explain { display: none; margin: 12px 0 0; font-size: 14.5px; color: var(--text-2); }
.quiz.done .explain { display: block; }

/* ---------- 翻页 ---------- */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 64px; }
.pager a { border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; background: var(--bg-elev); color: var(--text); font-weight: 600; }
.pager a:hover { border-color: var(--accent); text-decoration: none; }
.pager small { display: block; color: var(--text-3); font-weight: 400; font-size: 12px; }
.pager .next { text-align: right; }

/* ---------- 源码浏览 ---------- */
.source-browser { display: grid; grid-template-columns: 220px minmax(0, 1fr); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--bg-elev); min-height: 420px; }
.src-files { border-right: 1px solid var(--border); padding: 8px 0; font: 13px var(--mono); overflow-y: auto; max-height: 640px; }
.src-files button { display: block; width: 100%; text-align: left; border: 0; background: none; padding: 4px 14px; cursor: pointer; color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.src-files button:hover { background: var(--bg-sunk); }
.src-files button.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.src-view { overflow: auto; max-height: 640px; }
.src-view .codeblock { margin: 0; border: 0; border-radius: 0; }
@media (max-width: 700px) { .source-browser { grid-template-columns: 1fr; } .src-files { max-height: 160px; border-right: 0; border-bottom: 1px solid var(--border); } }
.rel-list { padding-left: 1.2em; }

/* ---------- 首页 ---------- */
.home .content { padding-top: 0; }
.hero { max-width: 1080px; margin: 0 auto; padding: 64px 0 40px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.2; margin: 10px 0 16px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { font-size: 17px; color: var(--text-2); }
.hero-cta { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.hero-cta .btn { font-size: 15px; padding: 9px 20px; }
.hero-pics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.hero-pics div { aspect-ratio: 16/9; border-radius: 10px; background: #1b202e center / cover; box-shadow: var(--shadow); }
.features { max-width: 1080px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature { border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--bg-elev); }
.feature b { display: block; margin-bottom: 4px; }
.feature span { font-size: 14px; color: var(--text-2); }
.home-sec { max-width: 1080px; margin: 56px auto 0; }
.home-sec > h2 { font-size: 26px; margin: 0 0 6px; }
.home-sec > p { color: var(--text-2); margin: 0 0 20px; }
.demo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.demo-card { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--bg-elev); color: var(--text); box-shadow: var(--shadow); transition: transform .15s; }
.demo-card:hover { transform: translateY(-2px); text-decoration: none; border-color: var(--accent); }
.demo-card-img { aspect-ratio: 16/9; background: #1b202e center / cover; }
.demo-card-body { padding: 12px 16px 16px; }
.demo-card h3 { margin: 0 0 4px; font-size: 17px; }
.demo-card p { margin: 0; font-size: 14px; color: var(--text-2); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tags span { font-size: 12px; background: var(--bg-sunk); border-radius: 20px; padding: 1px 10px; color: var(--text-2); }
.toc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 18px; }
.toc-part { border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; background: var(--bg-elev); }
.toc-part h3 { margin: 0 0 8px; font-size: 15px; color: var(--accent); }
.toc-part ol { list-style: none; padding: 0; margin: 0; }
.toc-part li a { display: flex; gap: 10px; padding: 7px 0; color: var(--text); border-top: 1px solid var(--border); }
.toc-part li:first-child a { border-top: 0; }
.toc-part li a:hover { text-decoration: none; color: var(--accent); }
.toc-part small { display: block; color: var(--text-3); font-size: 12.5px; line-height: 1.5; }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 36px; gap: 24px; }
  .hero h1 { font-size: 32px; }
  .features { grid-template-columns: 1fr 1fr; }
}

/* ---------- 颜色取自 GameTech 外壳（byte888.com/assets/gametech/shell.css），深浅色随外壳切换 ---------- */
:root, :root[data-theme="dark"] {
  --bg: var(--gt-bg); --bg-elev: var(--gt-panel); --bg-sunk: var(--gt-sunk); --border: var(--gt-line); --border-strong: var(--gt-line-strong);
  --text: var(--gt-fg); --text-3: var(--gt-muted); --accent: var(--gt-accent); --accent-2: var(--gt-accent-2); --accent-soft: var(--gt-accent-soft);
}
:root { --text-2: #4a554d; --code-bg: #f7f8f3; }
:root[data-theme="dark"] { --text-2: #b7c0b8; --code-bg: #0c0f0d; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: var(--gt-bg); --bg-elev: var(--gt-panel); --bg-sunk: var(--gt-sunk); --border: var(--gt-line); --border-strong: var(--gt-line-strong);
    --text: var(--gt-fg); --text-3: var(--gt-muted); --accent: var(--gt-accent); --accent-2: var(--gt-accent-2); --accent-soft: var(--gt-accent-soft);
    --text-2: #b7c0b8; --code-bg: #0c0f0d;
  }
}
/* 顶栏由外壳提供（.gt-topbar），侧栏在窄屏时从顶栏下方滑出 */

/* ---------- 触屏虚拟按键（叠在游戏画面上，颜色固定为半透明白，因为底下总是游戏画面） ---------- */
.touch-layer { position: absolute; inset: 0; pointer-events: none; z-index: 2; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.touch-layer > * { pointer-events: auto; touch-action: none; }
.tp-stick { position: absolute; left: 3%; bottom: 6%; height: 44%; max-height: 180px; min-height: 84px; aspect-ratio: 1;
  border-radius: 50%; background: rgba(255,255,255,.10); border: 2px solid rgba(255,255,255,.28); display: grid; place-items: center; }
.tp-stick i { width: 42%; height: 42%; border-radius: 50%; background: rgba(255,255,255,.42); box-shadow: 0 2px 8px rgba(0,0,0,.35); transition: transform .06s; }
.tp-buttons { position: absolute; right: 3%; bottom: 6%; height: 62%; max-width: 52%; display: flex; flex-direction: row-reverse; flex-wrap: wrap-reverse; align-content: flex-start; align-items: flex-end; gap: 8px; pointer-events: none; }
.tp-btn { pointer-events: auto; touch-action: none; height: 28%; min-height: 40px; max-height: 64px; aspect-ratio: 1; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.35); background: rgba(255,255,255,.14); color: #fff; font-size: 13px; font-weight: 600;
  text-shadow: 0 1px 2px rgba(0,0,0,.6); padding: 0; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.tp-btn.main { min-height: 56px; max-height: 84px; height: 40%; font-size: 15px; background: rgba(71,140,191,.45); border-color: rgba(140,200,240,.7); }
.tp-btn.on { background: rgba(255,255,255,.45); transform: scale(.94); }
.tp-look { position: absolute; top: 0; right: 0; width: 55%; height: 100%; display: flex; align-items: flex-start; justify-content: center; }
.tp-look span { margin-top: 10px; font-size: 12px; color: rgba(255,255,255,.55); text-shadow: 0 1px 2px rgba(0,0,0,.6); }
.tp-look.on span { opacity: 0; }
.btn[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

/* 伪全屏：iPhone Safari 不支持对普通元素全屏，就让示例铺满窗口 */
html.fs-fake-lock, html.fs-fake-lock body { overflow: hidden; }
.godot-demo.fs-fake .demo-stage { position: fixed; inset: 0; z-index: 9999; aspect-ratio: auto; width: 100vw; height: 100vh; height: 100dvh; }
.fs-close { position: absolute; top: 8px; left: 8px; z-index: 3; border: 1px solid rgba(255,255,255,.35); background: rgba(0,0,0,.45);
  color: #fff; border-radius: 8px; padding: 4px 10px; font-size: 13px; }
.demo-stage:fullscreen { aspect-ratio: auto; }
@media (max-width: 960px) { .demo-bar { flex-wrap: wrap; } }