@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Orbitron:wght@700;900&display=swap');

*,*::before,*::after{box-sizing:border-box}
:root{
--bg:#171f26;
--bg-2:#1b242d;
--ink:#c8e0f4;
--pink:#f5e0e8;
--dim:#93aabb;
--line:rgba(200,224,244,.16);
--line-2:rgba(200,224,244,.32);
--sh-d:rgba(0,0,0,.55);
--sh-l:rgba(200,224,244,.09);
--r:14px;
--rl:4px;
--max:1120px;
--font-d:'Orbitron',ui-sans-serif,system-ui,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
--font-m:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
margin:0;
background:
radial-gradient(1000px 520px at 12% -10%,rgba(245,224,232,.10),transparent 62%),
radial-gradient(900px 480px at 92% 2%,rgba(200,224,244,.13),transparent 60%),
var(--bg);
color:var(--ink);
font:400 16px/1.75 var(--font-m);
overflow-x:hidden;
}
h1,h2,h3{font-family:var(--font-d)}
img{max-width:100%}
::selection{background:rgba(245,224,232,.85);color:#171f26}

/* 头部 */
.site-head{
position:sticky;top:0;z-index:70;
padding:8px clamp(14px,4vw,32px) 0;
background:linear-gradient(180deg,rgba(23,31,38,.97),rgba(23,31,38,.84));
backdrop-filter:blur(10px);
border-bottom:1px solid var(--line);
}
.nav-toggle{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-bottom:6px}
.brand{
display:inline-flex;align-items:center;gap:10px;min-height:44px;
text-decoration:none;color:var(--ink);
font-family:var(--font-d);font-weight:900;font-size:clamp(16px,4.4vw,20px);letter-spacing:.12em;
}
.brand-txt{white-space:nowrap}
.brand-mark{width:12px;height:12px;border-radius:3px;background:var(--pink);box-shadow:0 0 14px rgba(245,224,232,.75);flex:none}
.brand-logo{width:36px;height:36px;border-radius:8px;object-fit:cover;display:block;border:1px solid var(--line-2)}
.cta{
display:inline-flex;align-items:center;min-height:44px;padding:0 16px;
border:1px solid var(--line-2);border-radius:999px;
background:linear-gradient(145deg,#1f2a33,#141c23);
box-shadow:-3px -3px 10px var(--sh-l),3px 3px 10px var(--sh-d);
color:var(--pink);font-size:16px;text-decoration:none;white-space:nowrap;
transition:transform 150ms ease,box-shadow 150ms ease,border-color 150ms ease;
}
.cta:hover{border-color:var(--pink);box-shadow:-3px -3px 12px var(--sh-l),3px 3px 12px var(--sh-d),0 0 22px rgba(245,224,232,.22)}
.cta:active{transform:scale(.96);box-shadow:inset -2px -2px 8px var(--sh-l),inset 2px 2px 8px var(--sh-d)}
.menu-row{display:flex;align-items:center;gap:12px;padding:6px 0 10px;border-top:1px solid rgba(200,224,244,.08)}
.burger{
display:inline-flex;align-items:center;gap:9px;min-height:40px;padding:6px 13px;
border:1px solid var(--line);border-radius:var(--r);
background:linear-gradient(145deg,#1d2731,#151d24);
box-shadow:-3px -3px 9px var(--sh-l),3px 3px 9px var(--sh-d);
color:var(--ink);font-size:16px;cursor:pointer;
transition:transform 150ms ease,box-shadow 150ms ease;
}
.burger:hover{border-color:var(--line-2)}
.burger:active{transform:scale(.96);box-shadow:inset -2px -2px 7px var(--sh-l),inset 2px 2px 7px var(--sh-d)}
.bars{display:grid;gap:4px;width:16px}
.bars i{display:block;height:1.6px;border-radius:2px;background:currentColor}
.menu-line{flex:1;height:1px;background:linear-gradient(90deg,var(--line-2),rgba(200,224,244,0))}

/* 全屏遮罩菜单 */
.overlay{
position:fixed;inset:0;z-index:65;
display:grid;place-items:center;
overflow:auto;
padding:clamp(126px,22vh,170px) clamp(14px,6vw,64px) 40px;
background:
radial-gradient(700px 420px at 72% 8%,rgba(245,224,232,.12),transparent 62%),
radial-gradient(600px 380px at 20% 90%,rgba(200,224,244,.12),transparent 60%),
rgba(15,21,27,.97);
opacity:0;visibility:hidden;transition:opacity 220ms ease,visibility 220ms ease;
}
.nav-toggle:checked ~ .overlay{opacity:1;visibility:visible}
.ove-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(158px,1fr));gap:12px;width:min(780px,100%)}
.ove-grid a{
display:flex;align-items:center;gap:10px;min-height:58px;padding:12px 14px;
border:1px solid var(--line);border-radius:var(--r);
background:linear-gradient(145deg,#1e2933,#151d24);
box-shadow:-3px -3px 10px var(--sh-l),3px 3px 10px var(--sh-d);
color:var(--ink);text-decoration:none;font-size:17px;
transition:transform 150ms ease,border-color 150ms ease,color 150ms ease;
}
.ove-grid a:hover{border-color:var(--pink);color:var(--pink)}
.ove-grid a:active{transform:scale(.97)}
.ove-grid em{font-style:normal;font-family:var(--font-d);font-size:16px;color:var(--pink);letter-spacing:.06em}

/* 首屏 */
.hero{
display:grid;justify-items:center;gap:18px;text-align:center;
min-height:45vh;
padding:clamp(26px,6vw,52px) clamp(14px,5vw,28px) clamp(24px,5vw,40px);
scroll-margin-top:150px;
}
.hero-txt{display:grid;justify-items:center;gap:14px;max-width:760px}
.badge{
margin:0;padding:7px 15px;border-radius:999px;
border:1px solid rgba(245,224,232,.4);
background:linear-gradient(145deg,#202b34,#161e25);
box-shadow:-2px -2px 9px var(--sh-l),2px 2px 9px var(--sh-d);
font-family:var(--font-d);font-size:16px;letter-spacing:.14em;color:var(--pink);
}
.hero h1{
margin:0;font-weight:900;line-height:1.22;letter-spacing:.03em;
font-size:clamp(27px,7.4vw,52px);
color:#eef6fc;
background:linear-gradient(180deg,#f4fafe,#c8e0f4 58%,#f5e0e8);
-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
filter:drop-shadow(0 0 24px rgba(200,224,244,.24));
}
.lede{margin:0;max-width:52ch;color:var(--dim);font-size:16px;line-height:1.7}
.hero-fig{margin:0;width:min(660px,100%);display:grid;gap:9px;justify-items:center}
.hero-fig img{width:100%;height:auto;display:block;border-radius:var(--rl);border:1px solid var(--line)}
.hero-fig figcaption{font-size:16px;letter-spacing:.14em;color:var(--dim);font-family:var(--font-d)}
.orb{
width:100%;height:clamp(92px,18vh,148px);
border-radius:var(--rl);border:1px solid var(--line);
background:
radial-gradient(circle at 20% 30%,rgba(245,224,232,.55),transparent 42%),
radial-gradient(circle at 74% 66%,rgba(200,224,244,.6),transparent 46%),
linear-gradient(145deg,#1f2b35,#131b22);
background-size:180% 180%;
box-shadow:inset -4px -4px 14px var(--sh-l),inset 5px 5px 16px rgba(0,0,0,.5);
animation:drift 15s ease-in-out infinite;
}
@keyframes drift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

/* 正文与侧栏 */
.wrap{max-width:var(--max);margin:0 auto;padding:clamp(18px,4vw,32px) clamp(14px,4vw,28px) 0}
.cols{display:grid;grid-template-columns:minmax(0,1fr) 282px;gap:clamp(16px,3vw,30px);align-items:start}
.prose{display:grid;gap:16px;min-width:0}
.prose section{
scroll-margin-top:150px;
padding:clamp(16px,3.4vw,28px);
border:1px solid var(--line);
border-radius:var(--rl);
background:linear-gradient(160deg,rgba(31,43,53,.78),rgba(20,28,35,.78));
transition:border-color 180ms ease,box-shadow 180ms ease;
overflow-wrap:break-word;
}
.prose section:hover{border-color:rgba(200,224,244,.32);box-shadow:0 0 0 1px rgba(245,224,232,.1),0 0 34px rgba(200,224,244,.06)}
.prose h2{
margin:0 0 6px;font-size:clamp(19px,3.6vw,26px);line-height:1.35;letter-spacing:.02em;color:#eaf4fb;
}
.prose h2::before{
content:"";display:inline-block;width:8px;height:8px;margin-right:10px;vertical-align:middle;
border-radius:2px;background:var(--pink);box-shadow:0 0 12px rgba(245,224,232,.8);
}
.prose h3{margin:14px 0 6px;font-size:18px;color:#e2eef7}
.prose hr,.side hr{height:0;border:0;border-top:1px solid rgba(245,224,232,.36);margin:0 0 14px}
.prose p{margin:0 0 12px;color:#c4d8e7}
.prose p:last-child,.prose ul:last-child,.prose ol:last-child{margin-bottom:0}
.prose a{color:var(--pink);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:#fff}
.prose strong{color:#f2f9fe}
.prose ul,.prose ol{margin:0 0 12px;padding-left:1.35em}
.prose li{margin-bottom:7px}
.prose blockquote{
margin:0 0 12px;padding:12px 15px;color:#e2edf5;
border-left:3px solid rgba(245,224,232,.55);
border-radius:0 var(--rl) var(--rl) 0;
background:rgba(245,224,232,.06);
}
.prose figure{margin:0 0 12px}
.prose figcaption{font-size:16px;color:var(--dim);margin-top:6px}
.prose img{border-radius:var(--rl);border:1px solid var(--line);display:block;height:auto}
.prose table{width:100%;border-collapse:collapse;font-size:16px}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}

.side{
position:sticky;top:150px;min-width:0;
padding:16px;
border:1px solid var(--line);border-radius:var(--rl);
background:linear-gradient(160deg,#1d2730,#141c23);
box-shadow:-4px -4px 12px var(--sh-l),4px 4px 12px rgba(0,0,0,.42);
}
.side h2{margin:0 0 8px;font-size:16px;letter-spacing:.12em;color:var(--pink)}
.side ol{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.side a{
display:flex;align-items:center;gap:9px;min-height:40px;padding:5px 9px;
border:1px solid transparent;border-radius:10px;
color:var(--ink);text-decoration:none;font-size:16px;
transition:background 150ms ease,border-color 150ms ease,box-shadow 150ms ease;
}
.side a:hover{
border-color:var(--line-2);background:rgba(200,224,244,.05);
box-shadow:inset -2px -2px 6px var(--sh-l),inset 2px 2px 6px rgba(0,0,0,.35);
}
.side em{font-style:normal;font-family:var(--font-d);color:var(--dim);font-size:16px}

/* 页脚 */
.site-foot{
margin-top:clamp(34px,7vw,64px);
padding:clamp(24px,5vw,42px) clamp(14px,4vw,32px);
display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1.15fr) auto auto;
gap:22px;align-items:start;
border-top:1px solid var(--line);
background:linear-gradient(180deg,rgba(23,31,38,.35),rgba(12,17,22,.96));
}
.foot-brand{
font-family:var(--font-d);font-weight:900;line-height:1.05;letter-spacing:.03em;
font-size:clamp(26px,6.6vw,44px);
color:#eaf4fb;
background:linear-gradient(150deg,#eaf5fd,#c8e0f4 55%,#f5e0e8);
-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
filter:drop-shadow(0 0 18px rgba(200,224,244,.2));
overflow-wrap:break-word;
}
.foot-nav dl{margin:0;display:grid;gap:2px}
.foot-nav div{display:flex;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px dashed rgba(200,224,244,.1)}
.foot-nav dt{margin:0;font-size:16px}
.foot-nav dd{margin:0;font-family:var(--font-d);color:var(--dim);font-size:16px}
.foot-nav a{display:inline-flex;align-items:center;min-height:40px;padding:2px 0;color:var(--ink);text-decoration:none}
.foot-nav a:hover{color:var(--pink)}
.foot-meta p{margin:0;color:var(--dim);font-size:16px;line-height:1.6}
.foot-top a{
display:inline-flex;align-items:center;min-height:44px;padding:0 15px;
border:1px solid var(--line-2);border-radius:var(--r);
background:linear-gradient(145deg,#1e2831,#141c23);
box-shadow:-3px -3px 10px var(--sh-l),3px 3px 10px var(--sh-d);
color:var(--pink);text-decoration:none;font-size:16px;white-space:nowrap;
transition:transform 150ms ease,box-shadow 150ms ease;
}
.foot-top a:active{transform:scale(.96);box-shadow:inset -2px -2px 8px var(--sh-l),inset 2px 2px 8px var(--sh-d)}

@media (max-width:900px){
.cols{grid-template-columns:minmax(0,1fr)}
.side{position:static;order:2}
}
@media (max-width:820px){
.site-foot{grid-template-columns:1fr 1fr}
.foot-brand{grid-column:1 / -1}
}
@media (max-width:520px){
.site-foot{grid-template-columns:1fr}
.foot-top{grid-column:1 / -1}
}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
*{animation:none!important;transition:none!important}
}
</style>

button[aria-expanded]{min-width:44px;min-height:44px}