/* QUICKSHOW 捷展 — system fonts only, no external requests */
:root{--ink:#0b0b0b;--paper:#fff;--mute:#5a5a5a;--line:#dcdcdc;--soft:#f4f4f2;--accent:#1d4ed8;--max:1180px;
--sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font:16px/1.65 var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
a:focus-visible,summary:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:50}
.skip:focus{left:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.1rem}
/* header */
.site-header{border-bottom:1px solid var(--ink);background:var(--paper);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:60px}
.logo img{height:26px;width:auto}
.nav-toggle{display:none}
.nav{display:flex;align-items:center;gap:1.4rem}
.nav a{text-decoration:none;font-family:var(--mono);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;padding:.3rem 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current=page]{border-bottom-color:var(--ink)}
.nav .lang{border:1px solid var(--ink);padding:.25rem .6rem}
.menu{display:none}
@media(max-width:860px){
 .nav{display:none}
 .menu{display:block}
 .menu summary{list-style:none;cursor:pointer;font-family:var(--mono);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--ink);padding:.4rem .8rem}
 .menu summary::-webkit-details-marker{display:none}
 .menu nav{position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:1px solid var(--ink);padding:.5rem 1.1rem 1rem;display:grid}
 .menu nav a{padding:.7rem 0;border-bottom:1px solid var(--line);text-decoration:none;font-family:var(--mono);text-transform:uppercase;font-size:.85rem}
}
/* type */
h1,h2,h3{line-height:1.15;margin:0 0 .7rem;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,5.2vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.4rem,3.4vw,2.1rem);font-weight:800}
h3{font-size:1.1rem;font-weight:700}
p{margin:0 0 1rem}
.kicker{font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);margin:0 0 .8rem}
.lede{font-size:clamp(1.05rem,2.2vw,1.25rem);max-width:46em;color:#222}
.section{padding:3rem 0;border-top:1px solid var(--line)}
.section.dark{background:var(--ink);color:#fff;border-top:0}
.section.dark .kicker,.section.dark .lede{color:#cfcfcf}
.section.soft{background:var(--soft)}
.hero{padding:2.5rem 0 2rem}
.crumbs{font-family:var(--mono);font-size:.75rem;color:var(--mute);padding:1rem 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;gap:.4rem;list-style:none;margin:0;padding:0}
.crumbs li+li::before{content:"/";margin-right:.4rem}
.crumbs a{color:var(--mute)}
/* buttons */
.btns{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.2rem}
.btn{display:inline-block;text-decoration:none;font-family:var(--mono);font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;padding:.8rem 1.2rem;border:2px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer}
.btn:hover{background:#fff;color:var(--ink)}
.btn.alt{background:#fff;color:var(--ink)}
.btn.alt:hover{background:var(--ink);color:#fff}
.dark .btn{background:#fff;color:var(--ink);border-color:#fff}
.dark .btn:hover{background:transparent;color:#fff}
/* grids */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.grid>*{background:var(--paper)}
.stats{grid-template-columns:repeat(2,1fr)}
.stat{padding:1.2rem}
.stat b{display:block;font-size:clamp(1.3rem,3vw,1.9rem);line-height:1.1}
.stat span{font-size:.85rem;color:var(--mute)}
@media(min-width:720px){.stats{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1000px){.stats{grid-template-columns:repeat(6,1fr)}}
.cards{display:grid;gap:1.1rem;grid-template-columns:repeat(2,1fr);list-style:none;padding:0;margin:1.2rem 0 0}
@media(min-width:760px){.cards{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1000px){.cards{grid-template-columns:repeat(4,1fr)}}
.card a{text-decoration:none;display:block}
.card .ph{background:var(--soft);aspect-ratio:6/5;overflow:hidden}
.card img{width:100%;height:100%;object-fit:cover}
.card h3{margin:.6rem 0 .1rem;font-size:.98rem}
.card .code{font-family:var(--mono);font-size:.75rem;color:var(--mute)}
.card a:hover h3{text-decoration:underline}
.tiles{display:grid;gap:1rem;grid-template-columns:1fr}
@media(min-width:700px){.tiles{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.tiles{grid-template-columns:repeat(4,1fr)}}
.tile{position:relative;background:#111;color:#fff;overflow:hidden;min-height:340px;display:flex}
.tile a{display:flex;flex-direction:column;justify-content:flex-end;width:100%;text-decoration:none;position:relative;padding:1.1rem;z-index:1;background:linear-gradient(to top,rgba(0,0,0,.82),rgba(0,0,0,.05) 70%)}
.tile img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.tile img.lg{height:22px;width:auto;margin-bottom:.5rem}
.tile h3{margin:0 0 .3rem;font-size:1.3rem}
.tile p{margin:0;font-size:.88rem;color:#e6e6e6}
.tile .tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;margin-bottom:.4rem;color:#fff}
.banner{margin-top:1.5rem}
.banner img{width:100%;height:auto}
/* tables & lists */
.tablewrap{overflow-x:auto;border:1px solid var(--ink)}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{text-align:left;padding:.7rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;background:var(--soft)}
caption{text-align:left;font-family:var(--mono);font-size:.75rem;color:var(--mute);padding:.5rem 0}
.steps{counter-reset:s;list-style:none;padding:0;margin:1.2rem 0 0;display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.steps li{counter-increment:s;background:var(--paper);padding:1.1rem 1.1rem 1.1rem 4rem;position:relative}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:1.1rem;top:1rem;font-family:var(--mono);font-size:1.2rem;font-weight:700}
.steps h3{margin:0 0 .2rem}
.steps p{margin:0;color:#333}
.ticks{padding-left:1.1rem}.ticks li{margin:.35rem 0}
dl.kv{display:grid;grid-template-columns:max-content 1fr;gap:.5rem 1.4rem;margin:1rem 0}
dl.kv dt{font-family:var(--mono);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--mute);padding-top:.15rem}
dl.kv dd{margin:0;word-break:break-word}
.dark dl.kv dt{color:#bbb}
.pill{display:inline-block;border:1px solid var(--ink);padding:.12rem .6rem;margin:0 .35rem .35rem 0;font-size:.82rem}
/* two column */
.split{display:grid;gap:1.6rem}
@media(min-width:860px){.split{grid-template-columns:1fr 1fr;align-items:start}.split.wide-left{grid-template-columns:1.3fr 1fr}}
.gallery{display:grid;gap:.8rem;grid-template-columns:repeat(2,1fr)}
.gallery img{width:100%;height:auto;background:var(--soft)}
.gallery .first{grid-column:1/-1}
/* faq */
.faq details{border-top:1px solid var(--ink);padding:.9rem 0}
.faq details:last-child{border-bottom:1px solid var(--ink)}
.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::after{content:"+";font-family:var(--mono)}
.faq details[open] summary::after{content:"–"}
.faq summary::-webkit-details-marker{display:none}
.faq details p{margin:.7rem 0 0;color:#222;max-width:48em}
/* inquiry template */
pre.tpl{white-space:pre-wrap;background:var(--soft);border:1px solid var(--ink);padding:1rem;font:.9rem/1.7 var(--mono);overflow-x:auto}
/* footer */
.site-footer{background:var(--ink);color:#e8e8e8;padding:2.5rem 0 1.5rem;margin-top:0}
.site-footer a{color:#fff}
.fgrid{display:grid;gap:1.8rem;grid-template-columns:1fr}
@media(min-width:800px){.fgrid{grid-template-columns:1.4fr 1fr 1fr 1.4fr}}
.site-footer h2{font-family:var(--mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:#bbb;font-weight:400}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:.3rem 0}
.site-footer .logo img{filter:invert(1);height:24px}
.legal{border-top:1px solid #333;margin-top:1.8rem;padding-top:1rem;font-size:.82rem;color:#bbb}
.draft{border:1px dashed var(--ink);padding:.7rem 1rem;font-size:.9rem;background:var(--soft)}
.prose{max-width:46em}
.fab{border-top:1px solid var(--ink);padding:1.6rem 0}
.fab-g{display:grid;gap:1rem}
@media(min-width:860px){.fab-g{grid-template-columns:260px 1fr;gap:2rem}}
.fab img{background:var(--soft)}
.landing{min-height:100vh;display:flex;flex-direction:column;justify-content:center;background:var(--ink);color:#fff}
.landing .logo img{filter:invert(1);height:34px;margin-bottom:2rem}
.landing .choices{display:grid;gap:1px;background:#333;margin-top:2rem;border:1px solid #333}
@media(min-width:700px){.landing .choices{grid-template-columns:1fr 1fr}}
.landing .choices a{display:block;background:var(--ink);color:#fff;padding:1.6rem;text-decoration:none}
.landing .choices a:hover{background:#fff;color:var(--ink)}
.landing .choices strong{display:block;font-size:1.6rem}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.site-footer,.btns{display:none}}