:root{
--bg:#161616;
--fg:oklch(98.5% 0 0);
--dim:oklch(70.8% 0 0);
--faint:oklch(98.5% 0 0/.55);
--card:oklch(20.5% 0 0/.5);
--card-solid:oklch(20.5% 0 0);
--muted:oklch(26.9% 0 0);
--line:oklch(100% 0 0/.1);
--line2:oklch(100% 0 0/.16);
--blue:oklch(68.5% .169 237.323);
--blue-dim:oklch(82.8% .111 230.318);
--blue-bg:oklch(68.5% .169 237.323/.12);
--primary:oklch(92.2% 0 0);
--on-primary:oklch(20.5% 0 0);
--r:10px;
--r-s:8px;
--sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','HarmonyOS Sans SC','MiSans','Microsoft YaHei UI','Microsoft YaHei',sans-serif;
--mono:ui-monospace,'SF Mono',SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
svg{display:block}
.ic{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
::selection{background:var(--blue-bg);color:var(--fg)}
a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}

.zd-head{position:sticky;top:0;z-index:40;height:52px;background:rgba(22,22,22,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.zd-head-in{max-width:1280px;margin:0 auto;height:100%;padding:0 24px;display:flex;align-items:center;gap:20px}
.zd-brand{display:flex;align-items:center;gap:9px;font-weight:600;font-size:14px;letter-spacing:-.01em}
.zd-brand img{width:22px;height:22px;border-radius:5px}
.zd-nav{display:flex;align-items:center;gap:4px;font-size:13.5px}
.zd-nav a{padding:6px 10px;border-radius:var(--r-s);color:var(--dim)}
.zd-nav a:hover{color:var(--fg)}
.zd-nav a.on{color:var(--fg);box-shadow:inset 0 -2px 0 var(--fg);border-radius:4px 4px 0 0}
.zd-search{margin-left:auto;display:flex;align-items:center;gap:8px;width:200px;height:34px;padding:0 8px 0 10px;background:var(--muted);border:1px solid var(--line2);border-radius:var(--r-s);color:var(--faint);font-size:13px}
.zd-search:hover{border-color:oklch(100% 0 0/.24)}
.zd-search .ic{width:15px;height:15px}
.zd-search kbd{margin-left:auto;font-family:var(--mono);font-size:11px;padding:2px 6px;background:var(--card-solid);border:1px solid var(--line2);border-radius:5px;color:var(--dim)}
.zd-cta{background:var(--primary);color:var(--on-primary);font-size:13px;font-weight:500;padding:7px 14px;border-radius:var(--r-s)}
.zd-cta:hover{background:#fff}
.zd-lang{display:inline-flex;align-items:center;justify-content:center;min-width:46px;height:31px;padding:0 12px;font-size:12.5px;font-weight:500;letter-spacing:.02em;color:var(--dim);border:1px solid var(--line2);border-radius:999px}
.zd-lang:hover{color:var(--fg);border-color:oklch(100% 0 0/.26)}
.zd-burger{display:none;width:34px;height:34px;align-items:center;justify-content:center;border:1px solid var(--line2);border-radius:var(--r-s);color:var(--dim)}

.zd-shell{max-width:1280px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:232px minmax(0,1fr) 200px;gap:44px;align-items:start}
.zd-shell.no-toc{grid-template-columns:232px minmax(0,1fr)}
.zd-side{position:sticky;top:76px;max-height:calc(100vh - 100px);overflow-y:auto;padding:26px 0 40px;font-size:14px;scrollbar-width:thin;scrollbar-color:oklch(20% 0 0/.55) transparent}
.zd-side::-webkit-scrollbar{width:6px}
.zd-side::-webkit-scrollbar-thumb{background:oklch(20% 0 0/.55);border-radius:999px}
.zd-group{margin-bottom:20px}
.zd-group h3{margin:0 0 6px;padding:0 12px 0 16px;font-size:13px;font-weight:600;color:var(--dim)}
.zd-group a{position:relative;display:block;padding:5px 12px 5px 24px;color:oklch(98.5% 0 0/.68);border-radius:6px;line-height:1.45}
.zd-group a:hover{color:var(--fg);background:oklch(100% 0 0/.05)}
.zd-group a.on{color:var(--blue)}
.zd-group a.on::before{content:'';position:absolute;left:12px;top:8px;bottom:8px;width:2px;border-radius:2px;background:var(--blue)}

.zd-main{min-width:0;padding:34px 0 72px}
.zd-label{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:500;letter-spacing:.02em;color:var(--dim);background:var(--muted);border:1px solid var(--line);padding:3px 10px;border-radius:999px;margin-bottom:14px}
.zd-main h1{margin:0 0 10px;font-size:36px;line-height:1.22;font-weight:600;letter-spacing:-.02em}
.zd-lead{margin:0 0 8px;font-size:16px;line-height:1.65;color:var(--dim);max-width:66ch}
.zd-meta-row{display:flex;align-items:center;gap:10px;color:var(--faint);font-size:13px;margin:4px 0 6px}
.zd-meta-row .ic{width:14px;height:14px}
.zd-copy{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--dim);padding:5px 10px;border:1px solid var(--line2);border-radius:var(--r-s)}
.zd-copy:hover{color:var(--fg);border-color:oklch(100% 0 0/.26)}
.zd-copy .ic{width:13px;height:13px}

.zd-main h2{margin:52px 0 14px;font-size:26px;line-height:1.3;font-weight:600;letter-spacing:-.015em}
.zd-main h3{margin:34px 0 10px;font-size:19px;font-weight:600}
.zd-main h4{margin:26px 0 8px;font-size:16px;font-weight:600}
.zd-main p{margin:0 0 16px;line-height:1.7;color:var(--dim)}
.zd-main p strong{color:var(--fg);font-weight:600}
.zd-main ul,.zd-main ol{margin:0 0 16px;padding-left:22px;color:var(--dim);line-height:1.75}
.zd-main li{margin-bottom:5px}
.zd-main li::marker{color:var(--faint)}
.zd-main a:not(.zd-card):not(.zd-pn):not(.zd-banner){color:var(--blue-dim);text-decoration:underline;text-underline-offset:3px;text-decoration-color:oklch(68.5% .169 237.323/.4)}
.zd-main a:not(.zd-card):not(.zd-pn):not(.zd-banner):hover{color:var(--blue);text-decoration-color:currentColor}
.zd-content code{font-family:var(--mono);font-size:.86em;background:var(--muted);border:1px solid var(--line);border-radius:5px;padding:2px 6px;color:var(--fg)}
.zd-code{margin:0 0 18px;border:1px solid var(--line);border-radius:var(--r);background:oklch(20.5% 0 0/.6);overflow:hidden}
.zd-code pre{margin:0;padding:16px 18px;overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.65;scrollbar-width:thin}
.zd-code .zd-codebar{display:flex;justify-content:flex-end;padding:6px 8px;border-bottom:1px solid var(--line)}
.zd-code .zd-codebar span{font-family:var(--mono);font-size:11px;color:var(--faint);margin-right:auto;padding:3px 4px}
.zd-code .zd-codebar button{font-size:11.5px;color:var(--dim);padding:3px 8px;border-radius:5px;display:flex;gap:5px;align-items:center}
.zd-code .zd-codebar button:hover{color:var(--fg);background:oklch(100% 0 0/.06)}
.zd-code .zd-codebar .ic{width:12px;height:12px}
.zd-content blockquote{margin:0 0 18px;padding:10px 16px;border-left:2px solid var(--line2);background:oklch(20.5% 0 0/.35);border-radius:0 8px 8px 0;color:var(--dim)}
.zd-content blockquote p{margin:0}
.zd-content hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.zd-content table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:14px}
.zd-content th{text-align:left;font-weight:600;color:var(--fg);background:var(--muted);padding:9px 12px;border:1px solid var(--line)}
.zd-content td{padding:9px 12px;border:1px solid var(--line);color:var(--dim)}
.zd-content img{max-width:100%;border-radius:var(--r);border:1px solid var(--line)}

.zd-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:6px 0 8px}
.zd-cards.two{grid-template-columns:repeat(2,1fr)}
.zd-cards.all{grid-template-columns:repeat(2,1fr)}
.zd-card{display:flex;gap:12px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);transition:border-color .15s cubic-bezier(.4,0,.2,1),background-color .15s cubic-bezier(.4,0,.2,1)}
.zd-card:hover{border-color:oklch(100% 0 0/.24);background:oklch(26.9% 0 0/.55)}
.zd-card>.ic{margin-top:2px;color:var(--blue-dim)}
.zd-card b{display:block;font-size:14px;font-weight:600;line-height:1.4;margin-bottom:3px}
.zd-card small{display:block;font-size:13px;line-height:1.55;color:var(--dim)}
.zd-card .zd-arrow{margin-left:auto;color:var(--faint);transition:transform .15s}
.zd-card:hover .zd-arrow{transform:translateX(2px);color:var(--dim)}
.zd-badge{display:inline-block;font-size:11px;line-height:1;padding:3px 8px;border-radius:999px;background:var(--blue-bg);color:var(--blue-dim);font-weight:500;margin-left:8px;vertical-align:2px}
.zd-banner{display:flex;align-items:center;gap:16px;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);transition:border-color .15s,background-color .15s}
.zd-banner:hover{border-color:oklch(100% 0 0/.24);background:oklch(26.9% 0 0/.55)}
.zd-banner .ic{width:26px;height:26px;color:var(--blue-dim)}
.zd-banner b{display:block;font-size:15px;font-weight:600;margin-bottom:2px}
.zd-banner small{display:block;font-size:13px;color:var(--dim)}
.zd-banner .zd-arrow{margin-left:auto}
.zd-pns{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}
.zd-pn{display:block;padding:16px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);transition:border-color .15s,background-color .15s}
.zd-pn:hover{border-color:oklch(100% 0 0/.24);background:oklch(26.9% 0 0/.55)}
.zd-pn span{display:block;font-size:12px;color:var(--faint);margin-bottom:5px}
.zd-pn b{font-size:14.5px;font-weight:600}
.zd-pn.next{text-align:right}

.zd-card,.zd-banner,.zd-pn{position:relative}
.zd-card::before,.zd-banner::before,.zd-pn::before{content:'';position:absolute;inset:0;border-radius:inherit;background:linear-gradient(135deg,oklch(68.5% .169 237.323/.09),transparent 58%);opacity:0;transition:opacity .3s cubic-bezier(.4,0,.2,1);pointer-events:none;z-index:0}
.zd-card:hover::before,.zd-banner:hover::before,.zd-pn:hover::before{opacity:1}
.zd-card::after,.zd-banner::after,.zd-pn::after{content:'';position:absolute;inset:0;border-radius:inherit;padding:1px;background:linear-gradient(90deg,var(--blue),oklch(82.8% .111 230.318/.85) 45%,transparent 92%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;transform:scaleX(0);transform-origin:left center;transition:transform .3s cubic-bezier(.4,0,.2,1);pointer-events:none;z-index:2}
.zd-card:hover::after,.zd-banner:hover::after,.zd-pn:hover::after{transform:scaleX(1)}
.zd-pn:not(.next)::after{transform-origin:right center}
.zd-card>*,.zd-banner>*,.zd-pn>*{position:relative;z-index:1}

.zd-toc{position:sticky;top:76px;padding:34px 0 60px;font-size:13px}
.zd-toc h4{margin:0 0 8px;font-size:13px;font-weight:600;color:var(--dim)}
.zd-toc-in{border-left:1px solid var(--line);padding-left:2px}
.zd-toc a{display:block;padding:4px 0 4px 12px;color:var(--faint);line-height:1.5;border-left:1px solid transparent;margin-left:-1px}
.zd-toc a:hover{color:var(--dim)}
.zd-toc a.on{color:var(--fg);border-left-color:var(--fg)}
.zd-toc a.lv3{padding-left:24px}
.zd-mtoc{margin:0 0 18px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);display:none}
.zd-mtoc summary{cursor:pointer;padding:12px 16px;font-size:13.5px;color:var(--dim);list-style:none}
.zd-mtoc summary::-webkit-details-marker{display:none}
.zd-mtoc[open] summary{border-bottom:1px solid var(--line)}
.zd-mtoc .zd-mtoc-in{padding:8px 16px 12px;font-size:13.5px}
.zd-mtoc .zd-mtoc-in a{display:block;padding:5px 0;color:var(--dim)}
.zd-mtoc .zd-mtoc-in a.lv3{padding-left:16px;font-size:13px}

.zd-mask{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:59;opacity:0;pointer-events:none;transition:opacity .2s}
.zd-mask.on{opacity:1;pointer-events:auto}

.zd-dialog{position:fixed;inset:0;z-index:60;background:rgba(0,0,0,.6);display:none;align-items:flex-start;justify-content:center;padding:12vh 20px 20px}
.zd-dialog.on{display:flex;animation:zd-fade .15s cubic-bezier(.4,0,.2,1)}
.zd-dialog-in{animation:zd-enter .15s cubic-bezier(.4,0,.2,1)}
@keyframes zd-fade{from{opacity:0}to{opacity:1}}
@keyframes zd-enter{from{opacity:0;transform:translateY(6px) scale(.985)}to{opacity:1;transform:none}}
.zd-dialog-in{width:min(560px,100%);background:var(--card-solid);border:1px solid var(--line2);border-radius:12px;overflow:hidden;box-shadow:0 16px 48px rgba(0,0,0,.5)}
.zd-dialog-in .zd-q{display:flex;align-items:center;gap:10px;padding:13px 16px;border-bottom:1px solid var(--line)}
.zd-dialog-in .zd-q .ic{width:16px;height:16px;color:var(--faint)}
.zd-dialog-in input{flex:1;background:none;border:0;outline:0;color:var(--fg);font-size:14.5px;font-family:inherit}
.zd-dialog-in input::placeholder{color:var(--faint)}
.zd-dialog-in .zd-q kbd{font-family:var(--mono);font-size:11px;color:var(--faint);border:1px solid var(--line2);border-radius:5px;padding:2px 6px}
.zd-res{max-height:46vh;overflow-y:auto;padding:6px}
.zd-res a{display:block;padding:9px 12px;border-radius:var(--r-s)}
.zd-res a:hover,.zd-res a.sel{background:var(--muted)}
.zd-res b{display:block;font-size:13.5px;font-weight:500;margin-bottom:1px}
.zd-res small{display:block;font-size:12.5px;color:var(--dim);line-height:1.45}
.zd-res .none{padding:14px 12px;color:var(--faint);font-size:13.5px}
.zd-res-foot{border-top:1px solid var(--line);padding:8px 14px;font-size:11.5px;color:var(--faint);display:flex;gap:14px}
.zd-res-foot kbd{font-family:var(--mono);border:1px solid var(--line2);border-radius:4px;padding:0 5px;margin-right:4px;font-size:10.5px}

.zd-foot{border-top:1px solid var(--line);margin-top:auto}
.zd-foot-in{max-width:1280px;margin:0 auto;padding:26px 24px;font-size:12.5px;color:var(--faint);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.zd-foot-in a{color:var(--dim)}
.zd-foot-in a:hover{color:var(--fg)}

@media(max-width:1080px){
.zd-shell,.zd-shell.no-toc{grid-template-columns:232px minmax(0,1fr)}
.zd-toc{display:none}
.zd-mtoc{display:block}
}
@media(max-width:900px){
.zd-cards,.zd-cards.two,.zd-cards.all{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
.zd-shell,.zd-shell.no-toc{grid-template-columns:minmax(0,1fr);gap:0}
.zd-side{position:fixed;left:0;top:0;bottom:0;width:272px;max-height:none;background:var(--card-solid);border-right:1px solid var(--line2);z-index:60;padding:18px 0 30px;transform:translateX(-100%);transition:transform .2s}
.zd-side.open{transform:none}
.zd-burger{display:flex}
.zd-search{width:38px;padding:0;justify-content:center}
.zd-search span,.zd-search kbd{display:none}
.zd-nav{display:none}
.zd-cards,.zd-cards.two,.zd-cards.all{grid-template-columns:1fr}
.zd-main h1{font-size:29px}
.zd-main h2{font-size:22px}
.zd-pns{grid-template-columns:1fr}
.zd-pn.next{text-align:left}
.zd-copy{display:none}
.zd-cta{padding:7px 11px}
.zd-head-in{gap:10px}
.zd-lang{min-width:38px;padding:0 9px;height:30px}
}