:root{color-scheme:light dark;--page:#fff;--group:#f5f5f7;--text:#1c1c1e;--muted:#626267;--line:#dedee3;--blue:#175cdd;--surface:#fff;--focus:#175cdd;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--page);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img{max-width:100%;height:auto}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--focus);outline-offset:4px}button:disabled{cursor:default}h1,h2,p{overflow-wrap:anywhere}h1{letter-spacing:-.025em}h2{font-size:24px;line-height:1.3}p{line-height:1.75}.site-header,.site-footer{max-width:1040px;margin:auto;display:flex;align-items:center;gap:12px;padding:20px max(20px,env(safe-area-inset-left));font-size:14px}.site-header{min-height:72px}.brand-icon{border-radius:7px;flex-shrink:0}.brand-name{font-weight:600}.header-actions{margin-left:auto;display:flex;align-items:center;gap:6px}.header-actions a{min-height:44px;display:inline-flex;align-items:center;justify-content:center}.header-download{padding:0 8px}.icon-button{width:44px;height:44px;border-radius:999px;color:var(--text)}.icon-button:hover{background:var(--group);text-decoration:none}.icon-button svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.site-footer{color:var(--muted);padding-top:32px;padding-bottom:max(32px,env(safe-area-inset-bottom))}.reading{max-width:720px;padding:28px 20px 16px;margin:auto}.reading h1{font-size:clamp(24px,4vw,28px);font-weight:600;line-height:1.45;margin:0 0 18px}.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:14px;color:var(--muted);margin-bottom:32px}.source{color:var(--blue)}.cover{margin:0 0 30px}.cover img{display:block;width:100%}.prose{font-size:17px;line-height:1.8;overflow-wrap:anywhere}.prose p{margin:0 0 1.4em;line-height:inherit}.prose h2,.prose h3{font-weight:600;margin:1.8em 0 .8em}.prose h2{font-size:22px}.prose h3{font-size:19px}.prose img{display:block;margin:24px auto;height:auto}.prose blockquote{margin:24px 0;padding:4px 18px;border-left:3px solid var(--line);color:var(--muted)}.prose blockquote p:last-child{margin-bottom:0}.prose ul,.prose ol{padding-left:1.6em}.prose li{margin-bottom:.5em}.prose pre{overflow:auto;max-width:100%;padding:16px;background:var(--group);border-radius:8px;font-size:14px}.prose code{font-family:ui-monospace,monospace;background:var(--group)}.prose table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:24px 0;font-size:15px}.prose th,.prose td{padding:10px 14px;border:1px solid var(--line)}.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0}.prose a{text-decoration:underline;text-underline-offset:3px}.article-app{border-top:1px solid var(--line);margin-top:48px;padding-top:24px;display:flex;gap:20px;align-items:center;justify-content:space-between}.article-app p{font-size:14px;color:var(--muted);margin:8px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 22px;background:var(--blue);color:#fff;border:0;border-radius:999px;font-size:15px;font-weight:600;line-height:1.5;text-align:center}.button:hover{text-decoration:none;filter:brightness(.94)}.button.secondary{background:var(--group);color:var(--blue);flex-shrink:0}.page-download{background:var(--group)}.download-layout{max-width:1040px;margin:auto;padding:20px 20px 48px}.app-hero{max-width:720px;margin:20px auto 64px;text-align:center}.app-icon{border-radius:24px;box-shadow:0 4px 20px #0000000a}.eyebrow{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}.app-hero h1{font-size:clamp(34px,6vw,56px);line-height:1.12;margin:12px 0 20px;font-weight:700}.intro{font-size:18px;white-space:pre-line;color:var(--muted);margin:0 auto 28px;max-width:640px}.screenshots-section{margin-bottom:64px}.screenshots{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:8px 2px 20px}.screenshots img{height:390px;max-width:85%;width:auto;object-fit:contain;border-radius:20px;scroll-snap-align:center;box-shadow:0 4px 20px #00000008}.download-section{background:var(--surface);border-radius:24px;padding:32px;margin-bottom:32px}.download-section h2{margin:10px 0}.download-section>div>p[role=status]{color:var(--muted);font-size:15px}.platform-filter{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}.platform-filter button{background:var(--group);color:var(--muted);border:1px solid transparent;border-radius:999px;padding:10px 18px;min-height:44px}.platform-filter button[aria-pressed=true]{border-color:var(--blue);color:var(--blue)}.download-options{list-style:none;padding:0;margin:0}.download-options li{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;border-top:1px solid var(--line)}.download-options strong{display:block;font-size:17px}.platform-label{display:block;color:var(--muted);font-size:13px;margin-bottom:5px}.download-options li.is-recommended .button{background:var(--blue);color:white}.supporting,.empty-state{font-size:14px;color:var(--muted)}.browser-note{background:var(--group);padding:16px;border-radius:12px}.qr-section{display:flex;align-items:center;justify-content:center;gap:32px;margin:48px 0}.qr-section img{padding:10px;background:white;border-radius:14px}.qr-section h2{font-size:20px}.qr-section p{color:var(--muted);font-size:15px}.text-button{background:none;border:0;color:var(--blue);min-height:44px;padding:0}.legal-links{display:flex;justify-content:center;gap:12px 24px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:24px}.legal-links a{font-size:14px;min-height:44px;display:flex;align-items:center}.skip-link{position:absolute;left:20px;top:-100px;background:var(--surface);padding:12px;z-index:2}.skip-link:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}.error-page{min-height:55vh;padding-top:80px}
@media(prefers-color-scheme:dark){:root{--page:#18181a;--group:#242426;--surface:#1c1c1e;--text:#f2f2f7;--muted:#b3b3ba;--line:#414146;--blue:#87b5ff;--focus:#87b5ff}.button{background:#246bfe;color:white}.download-options li.is-recommended .button{background:#246bfe}.prose img{opacity:.94}}
@media(max-width:540px){.reading{padding-top:20px}.site-header{border-bottom:1px solid var(--line)}.app-hero{margin-top:24px;margin-bottom:40px}.download-section{padding:24px 20px}.download-options li{align-items:flex-start;flex-wrap:wrap}.download-options li .button{max-width:100%}.screenshots img{height:330px}.qr-section{gap:20px;flex-direction:column;text-align:center}.article-app{align-items:flex-start;flex-direction:column}.intro{font-size:17px}}
@media(prefers-reduced-motion:no-preference){.button{transition:filter .15s}.platform-filter button{transition:border-color .15s}}
.article-summary{font-size:17px;line-height:1.75;color:var(--muted);margin:0 0 28px}
.reading-gallery,.reading-video{max-width:760px}.article-copy{max-width:680px;margin:32px auto 0}
.gallery-viewer{position:relative;margin:0 auto 34px}.gallery-track{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-x:contain;scrollbar-width:none;border-radius:18px;background:#0c0c0e}.gallery-track::-webkit-scrollbar{display:none}.gallery-slide{flex:0 0 100%;width:100%;min-height:320px;aspect-ratio:4/5;margin:0;scroll-snap-align:center;scroll-snap-stop:always;display:grid;place-items:center;background:#0c0c0e}.gallery-slide img{width:100%;height:100%;object-fit:contain}.gallery-control{position:absolute;top:calc(50% - 42px);width:44px;height:44px;border:0;border-radius:999px;background:#ffffffdc;color:#1c1c1e;box-shadow:0 4px 18px #0003;font-size:32px;line-height:1;z-index:1}.gallery-previous{left:12px}.gallery-next{right:12px}.gallery-counter{position:absolute;right:14px;top:14px;padding:5px 10px;border-radius:999px;background:#000a;color:#fff;font-size:13px;font-variant-numeric:tabular-nums}.gallery-thumbnails{display:flex;gap:8px;overflow-x:auto;padding:12px 2px 2px}.gallery-thumbnails button{width:56px;height:56px;flex:0 0 56px;border:2px solid transparent;border-radius:11px;padding:0;background:var(--group);overflow:hidden}.gallery-thumbnails button[aria-current=true]{border-color:var(--blue)}.gallery-thumbnails img{width:100%;height:100%;object-fit:cover}
.video-viewer{margin-bottom:34px}.video-mode-switch{position:absolute;z-index:3;top:12px;right:12px;display:flex;gap:4px;padding:4px;border-radius:999px;background:#0009;box-shadow:0 2px 12px #0005}.video-mode-switch button{display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:999px;padding:0;background:transparent;color:#fff}.video-mode-switch button[aria-pressed=true]{background:#fff;color:#111}.video-mode-switch svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.video-stage{position:relative;overflow:hidden;display:grid;place-items:center;width:100%;aspect-ratio:16/9;margin:auto;border-radius:18px;background:#000;transition:max-width .2s ease,aspect-ratio .2s ease}.video-stage video{display:block;width:100%;height:100%;object-fit:contain;background:#000}.video-overlay{display:none}.video-unavailable{color:#fff;padding:36px;text-align:center}.video-viewer[data-mode=vertical] .video-stage{max-width:430px;aspect-ratio:9/16;max-height:calc(100svh - 150px);border-radius:20px}.video-viewer[data-mode=vertical] .video-overlay{position:absolute;display:flex;left:0;right:0;bottom:0;flex-direction:column;gap:6px;padding:72px 22px 22px;color:#fff;background:linear-gradient(transparent,#000c);pointer-events:none}.video-overlay strong{font-size:22px;line-height:1.3}.video-overlay span{font-size:14px;line-height:1.5;color:#fffd;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
@media(max-width:540px){.reading-gallery,.reading-video{padding-left:0;padding-right:0}.reading-gallery>.article-copy,.reading-video>.article-copy,.reading-gallery>.article-app,.reading-video>.article-app{margin-left:20px;margin-right:20px}.gallery-track{border-radius:0}.gallery-slide{min-height:300px}.gallery-control{display:none}.gallery-counter{top:12px;right:12px}.gallery-thumbnails{padding-left:20px;padding-right:20px}.video-stage{border-radius:0}.video-viewer[data-mode=vertical] .video-stage{border-radius:0;max-height:calc(100svh - 130px)}}
@media(prefers-color-scheme:dark){.gallery-control{background:#222d;color:#fff}}
@media(prefers-reduced-motion:reduce){.video-stage{transition:none}}
.video-viewer[data-mode=vertical] .video-overlay{bottom:48px}
.commerce-products{margin-block:2rem}.commerce-product{display:flex;gap:1rem;padding:1rem;border:1px solid var(--border,#ddd);border-radius:12px;margin-block:1rem}.commerce-product>img{width:96px;height:96px;object-fit:cover;border-radius:8px}.commerce-product h3{margin-top:0}.commerce-product>div{min-width:0;overflow-wrap:anywhere}