:root{--bg: #ffffff;--fg: #1b1f24;--muted: #57606a;--line: #d0d7de;--accent: #0a5fd6;--panel: #f6f8fa;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #0d1117;--fg: #e6edf3;--muted: #9da7b3;--line: #30363d;--accent: #58a6ff;--panel: #161b22}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,PingFang SC,PingFang TC,Hiragino Sans GB,Microsoft YaHei,Microsoft JhengHei,Noto Sans CJK SC,Noto Sans CJK TC,Helvetica,Arial,sans-serif}main{max-width:56rem;margin:0 auto;padding:2rem 16px 4rem}.locales{color:var(--muted);font-size:.95rem;margin:0 0 1.5rem}.locales a{text-decoration:none}header{margin-bottom:2rem}h1{font-size:2.25rem;line-height:1.15;margin:0 0 .5rem;letter-spacing:-.01em}h1{display:flex;align-items:center;gap:.6rem}h1 .logo{width:2.75rem;height:2.75rem;flex:none}.tagline{font-size:1.2rem;color:var(--muted);margin:0 0 1.25rem}p{margin:0 0 1rem}a{color:var(--accent)}ul{padding-left:1.25rem;margin:0 0 1rem}li{margin:.25rem 0}.links{display:flex;flex-wrap:wrap;gap:.5rem 1rem;margin:0 0 1.5rem;padding:0;list-style:none}.links li{margin:0}.links a{display:inline-block;padding:.45rem .9rem;border:1px solid var(--line);border-radius:6px;text-decoration:none;background:var(--panel);color:var(--fg)}.links a.primary{background:var(--accent);border-color:var(--accent);color:#fff}pre{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:.75rem 1rem;overflow-x:auto;font-size:.9rem;margin:0 0 1.5rem}code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}h2{font-size:1.5rem;margin:2.5rem 0 1rem;padding-bottom:.4rem;border-bottom:1px solid var(--line)}.demo{margin:0 0 2.5rem}.demo h3{font-size:1.1rem;margin:0 0 .35rem}.demo p{color:var(--muted);margin:0 0 .75rem}video{display:block;width:100%;height:auto;background:#000;border:1px solid var(--line);border-radius:8px}video.portrait{width:auto;max-width:100%;max-height:85vh;margin:0 auto}footer{margin-top:3rem;color:var(--muted);font-size:.9rem}