.lightbox{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:#000000e6;display:flex;align-items:center;justify-content:center;padding:env(safe-area-inset-top,0) 12px env(safe-area-inset-bottom,0);animation:lightbox-fade .18s ease-out;touch-action:none}@keyframes lightbox-fade{0%{opacity:0}to{opacity:1}}.lightbox-img{max-width:100%;max-height:90vh;object-fit:contain;border-radius:4px;cursor:zoom-in;transition:transform .2s ease;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.lightbox-img.zoomed{cursor:grab;transition:none}.lightbox-img.zoomed:active{cursor:grabbing}.lightbox-close{position:absolute;top:calc(env(safe-area-inset-top,0) + 12px);right:16px;width:42px;height:42px;border:none;border-radius:50%;background:#ffffff26;color:#fff;font-size:26px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.lightbox-close:active{background:#ffffff4d}.lightbox-hint{position:absolute;bottom:calc(env(safe-area-inset-bottom,0) + 16px);left:0;right:0;text-align:center;color:#ffffffa6;font-size:13px;pointer-events:none}.page{max-width:720px;margin:0 auto;padding:24px 18px calc(48px + env(safe-area-inset-bottom,0))}.page-header{margin-bottom:8px}.page-header h1{font-size:1.9rem;font-weight:700;letter-spacing:-.01em;margin:0 0 6px}.subtitle{color:var(--text-muted);font-size:.9rem;margin:0}.block{margin-top:28px}.block h2{font-size:1.4rem;font-weight:600;letter-spacing:-.01em;padding-bottom:8px;border-bottom:1px solid var(--border);margin:0 0 12px}.block h3{font-size:1.12rem;font-weight:600;margin:22px 0 8px}.block p{margin:10px 0}.block ul,.block ol{margin:10px 0;padding-left:1.4em}.block li{margin:6px 0}.block ul li{list-style:disc}.indented{padding-left:4px}.fig{margin:16px 0;text-align:center}.fig img{display:inline-block;max-width:100%;border-radius:8px;border:1px solid var(--border);cursor:zoom-in;transition:transform .12s ease,box-shadow .12s ease}.fig img:active{transform:scale(.99)}@media (hover: hover){.fig img:hover{box-shadow:0 6px 20px #0000001f}}.code{background:var(--code-bg);border-radius:6px;padding:12px 14px;overflow-x:auto;font-size:.85rem;font-family:SFMono-Regular,Menlo,Consolas,monospace;margin:10px 0;white-space:pre-wrap;word-break:break-all}.code code{color:var(--text)}.callout{background:var(--callout-bg);border-radius:10px;padding:14px 16px;margin:18px 0;font-size:.95rem}.warn{color:var(--code-fg)}.warn strong{border-bottom:2px solid currentColor;padding-bottom:1px}.page-footer{margin-top:40px;padding-top:18px;border-top:1px solid var(--border);text-align:center;color:var(--text-muted);font-size:.85rem}@media (max-width: 480px){.page{padding:18px 14px calc(40px + env(safe-area-inset-bottom,0))}.page-header h1{font-size:1.55rem}.block h2{font-size:1.25rem}}:root{--bg: #ffffff;--text: rgb(55, 53, 47);--text-muted: rgba(55, 53, 47, .65);--border: rgba(55, 53, 47, .12);--code-bg: rgba(135, 131, 120, .15);--code-fg: #eb5757;--accent: #2f80ed;--callout-bg: #e5f2fc;--font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Apple Color Emoji", "Segoe UI Emoji", sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}img{max-width:100%;display:block}a{color:var(--accent);word-break:break-all}@media (prefers-color-scheme: dark){:root{--bg: #191919;--text: rgba(255, 255, 255, .9);--text-muted: rgba(255, 255, 255, .55);--border: rgba(255, 255, 255, .14);--code-bg: rgba(255, 255, 255, .1);--code-fg: #ff7b72;--callout-bg: rgba(47, 128, 237, .14);--accent: #6ab0ff}:root{color-scheme:dark}}