/* Native CSS. Variance 6 / Motion 3 / Density 3.
   Brand-centered composition follows the requested layout.
   Radius system: 10px controls, 20px dialog. Screenshots retain original frames. */
:root{color-scheme:light dark;--bg:#faf8f5;--text:#2e2925;--muted:#71685f;--accent:#b54e22;--accent-hover:#993c15;--on-accent:#fff8f3;--soft:#f7e9df;--border:#dfd7cf;--control:#fdfbf8;--shadow:rgba(104,68,37,.1)}
*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;overflow:hidden}
body{background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit;cursor:pointer}
button,a{touch-action:manipulation}
button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
.page{width:min(1200px,100%);height:100dvh;min-height:100dvh;margin:auto;padding:clamp(16px,3.2dvh,36px) 28px max(24px,env(safe-area-inset-bottom));display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto minmax(0,1fr) auto;row-gap:clamp(12px,2.1dvh,23px)}
.brand{display:flex;align-items:center;justify-content:center;gap:12px}
.brand-logo{width:56px;height:56px;object-fit:contain}
.brand-name{font-size:24px;font-weight:800;letter-spacing:1px;display:block;line-height:1.45}
.brand-subtitle{display:block;color:var(--muted);font-size:12px;letter-spacing:.45px}
.intro{text-align:center}
h1{font-size:clamp(30px,3.6vw,46px);line-height:1.4;letter-spacing:-1.2px;margin:0;font-weight:800}
h1 span{color:var(--accent)}
.intro p{font-size:16px;color:var(--muted);margin:8px 0 0;line-height:1.6}
.showcase{min-height:0;display:grid;grid-template-rows:auto auto minmax(0,1fr) auto;gap:12px}
.features{display:flex;align-items:center;justify-content:center;gap:7px}
.features button{padding:9px 18px;font-size:14px;white-space:nowrap;font-weight:600}
.feature-description{margin:0;text-align:center;font-size:14px;line-height:1.5;color:var(--muted)}
.gallery{position:relative;min-height:0;width:min(860px,100%);margin:auto;height:100%;isolation:isolate}
.screenshots{position:relative;height:100%;width:100%;overflow:hidden;touch-action:pan-y;user-select:none;container-type:size}
.shot{--offset:0;--size:1;position:absolute;top:0;left:50%;padding:0;border:0;background:transparent;height:100%;max-width:80%;aspect-ratio:1552/3317;opacity:0;transform:translateX(calc(-50% + var(--offset) * 124%)) scale(var(--size));transform-origin:center;pointer-events:none;visibility:hidden}
.shot.active{opacity:1;pointer-events:auto;visibility:visible;z-index:3}
.shot.neighbor{opacity:.5;pointer-events:auto;visibility:visible;z-index:1}
.shot img{display:block;height:100%;width:100%;object-fit:contain;filter:drop-shadow(0 10px 14px var(--shadow))}
.gallery-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:44px;height:44px;display:grid;place-items:center}
.gallery-nav span{font-family:system-ui,sans-serif;font-size:32px;line-height:1;margin-top:-3px}
.previous{left:0}.next{right:0}
.gallery-caption{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--muted);font-size:12px;height:22px}
.caption-divider{width:1px;height:11px;background:var(--border)}
.enlarge{padding:2px 7px;font-size:12px}
.actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:min(620px,100%);margin:auto;padding-top:5px}
.cta{display:flex;align-items:center;justify-content:center;gap:10px;min-height:52px;text-decoration:none;font-size:16px;font-weight:700;white-space:nowrap;box-shadow:0 6px 18px var(--shadow)}
.platform-icons{display:flex;align-items:center;gap:5px;flex-shrink:0}
.cta-icon{display:inline-block;flex-shrink:0;width:18px;height:18px;background:currentColor;-webkit-mask:var(--icon) center/contain no-repeat;mask:var(--icon) center/contain no-repeat}
.icon-android{--icon:url('assets/icons/android.svg')}
.icon-apple{--icon:url('assets/icons/apple.svg')}
.icon-qq{--icon:url('assets/icons/qq.svg')}
.icon-web{--icon:url('assets/icons/globe.svg')}
.cta:active,.features button:active{transform:scale(.98)}
.lightbox{width:min(760px,calc(100vw - 24px));height:calc(100dvh - 32px);max-height:calc(100dvh - 32px);max-width:calc(100vw - 24px);border:1px solid var(--border);border-radius:20px;padding:14px;background:var(--bg);color:var(--text);overflow:hidden}
.lightbox[open]{display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:12px}
.lightbox::backdrop{background:rgba(26,22,19,.8)}
.lightbox-toolbar,.lightbox-toolbar>div,.lightbox-navigation{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px}
.lightbox-toolbar>span{font-weight:700}
.lightbox button{min-width:40px;min-height:40px}
#close-lightbox{font-size:24px;margin-left:6px}
#zoom-label{min-width:43px;text-align:center;font-size:12px}
.lightbox-canvas{overflow:auto;display:block;text-align:center;min-height:0}
.lightbox-canvas img{display:block;height:100%;max-width:none;width:auto;margin:0 auto;object-fit:contain}
.lightbox-navigation button{padding:7px 14px}
.lightbox-navigation span{font-size:12px;color:var(--muted)}
button:not(.shot),.cta{background:var(--accent);color:var(--on-accent);border:1px solid var(--accent);border-radius:10px}
button:not(.shot):hover,.cta:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.features button{background:transparent;color:var(--muted);border-color:transparent;border-radius:100px;box-shadow:none}
.features button[aria-selected=true]{background:var(--soft);color:var(--accent);border-color:var(--soft)}
.features button:hover{background:transparent;color:var(--accent);border-color:transparent}
.features button[aria-selected=true]:hover{background:var(--soft);border-color:var(--soft)}
button:disabled{cursor:default}
@media(prefers-reduced-motion:no-preference){.shot{transition:transform .4s cubic-bezier(.22,.68,0,1),opacity .35s}.cta,.features button,.gallery-nav{transition:background .18s,color .18s,border-color .18s,transform .18s}}
@media(prefers-color-scheme:dark){:root{--bg:#211d1a;--text:#f6eee7;--muted:#c1b4a9;--accent:#f19b68;--accent-hover:#ffb58b;--on-accent:#2c1b10;--soft:#3b2a20;--border:#51463e;--control:#2b2521;--shadow:rgba(7,4,2,.22)}.shot.neighbor{opacity:.6}}
@media(max-width:767px){.page{padding:18px 16px max(20px,env(safe-area-inset-bottom));row-gap:16px}.brand-logo{width:48px;height:48px}.brand-name{font-size:21px}.brand-subtitle{font-size:12px}h1{font-size:clamp(27px,5.8vw,39px);letter-spacing:-.7px}.intro p{font-size:14px;line-height:1.6;margin-top:7px}.features{gap:3px}.features button{font-size:12px;padding:8px 9px}.showcase{gap:10px}.feature-description{font-size:12px}.shot{transform:translateX(calc(-50% + var(--offset) * 110%)) scale(var(--size))}.shot.neighbor{opacity:.35}.gallery-nav{width:34px;height:34px}.gallery-nav span{font-size:26px}.actions{gap:8px}.cta{min-height:46px;font-size:14px}.lightbox-toolbar{font-size:12px}}
@media(max-width:420px){h1{max-width:310px;margin:auto}h1 span{display:block}.page{row-gap:12px}.features button{padding:8px 7px}.actions{gap:6px}.cta{font-size:13px}}
@media(max-width:360px){.features{gap:2px}.features button{padding-inline:3px}}
@media(max-height:700px) and (min-width:768px){.page{padding-top:14px;padding-bottom:16px;row-gap:10px}.brand-logo{width:42px;height:42px}.brand-name{font-size:20px}h1{font-size:32px}.intro p{font-size:14px;margin-top:3px}.showcase{gap:7px}.features button{padding:6px 16px}.cta{min-height:44px}}
@media(max-height:650px) and (max-width:767px){.page{padding-top:10px;padding-bottom:12px;row-gap:9px}.brand-logo{width:36px;height:36px}.brand-name{font-size:18px}.brand-subtitle{font-size:12px}h1{font-size:25px;line-height:1.25}.intro p{font-size:12px;margin-top:4px}.showcase{gap:6px}.features button{padding-top:5px;padding-bottom:5px}.cta{min-height:42px}.gallery-caption{height:18px}}
@media(max-height:480px){.page{padding:8px 20px;row-gap:4px}.brand-logo{width:30px;height:30px}.brand-name{font-size:16px}.brand-subtitle{display:none}h1{font-size:22px;line-height:1.25}h1 span{display:inline}.intro p{font-size:12px;margin-top:1px}.showcase{gap:4px}.features button{padding:4px 12px;font-size:12px}.feature-description{font-size:12px}.gallery-caption{height:17px}.cta{min-height:36px;font-size:13px}.gallery-nav{width:30px;height:30px}.gallery-nav span{font-size:22px}}
@media(max-width:767px){h1{font-size:clamp(18px,4.8vw,34px);max-width:none;white-space:nowrap;letter-spacing:-.5px}h1 span{display:inline}.cta{gap:6px}.cta-icon{width:16px;height:16px}.platform-icons{gap:4px}}
@media(max-width:420px){.cta{font-size:12px;gap:4px}.cta-icon{width:14px;height:14px}.platform-icons{gap:3px}}