@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root{
  --ink:#0d0d0d;
  --ink-2:#120f19;
  --panel:#131020;
  --line:#2b2138;
  --violet:#8000ff;
  --magenta:#ff00ff;
  --fg:#ece7f7;
  --dim:#a89ec2;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --pad:clamp(14px,3.4vw,30px);
  --rad:10px;
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:"Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.72;
  color:var(--fg);
  background-color:var(--ink);
  background-image:
    radial-gradient(880px 460px at 10% -6%,rgba(128,0,255,.30),transparent 62%),
    radial-gradient(700px 420px at 94% 2%,rgba(255,0,255,.18),transparent 60%);
  background-repeat:no-repeat;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:35;
  pointer-events:none;
  opacity:.5;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.055) 0 1px,transparent 1px 4px);
}

a{color:inherit}

.skip{
  position:absolute;
  left:10px;
  top:-72px;
  z-index:60;
  padding:12px 18px;
  border-radius:0 0 var(--rad) var(--rad);
  background:var(--magenta);
  color:#0d0d0d;
  font-size:16px;
  font-weight:500;
  text-decoration:none;
  transition:top .18s ease;
}
.skip:focus{top:0}

/* 顶栏 */
.hd{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(13,13,13,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.hd-brand{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px var(--pad);
  border-bottom:1px solid rgba(128,0,255,.22);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  color:#fff;
  font-size:17px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  text-shadow:0 0 16px rgba(255,0,255,.55);
}
.brand:hover{text-shadow:0 0 24px rgba(255,0,255,.95)}
.blogo{width:34px;height:34px;border-radius:6px;object-fit:cover;box-shadow:0 0 16px rgba(128,0,255,.75)}
.brand-mark{
  display:block;
  width:13px;
  height:26px;
  background:linear-gradient(180deg,var(--magenta),var(--violet));
  box-shadow:0 0 14px var(--magenta);
  clip-path:polygon(0 0,100% 14%,100% 100%,0 86%);
}

.srch{display:flex;align-items:center;overflow:hidden;border:1px solid var(--line);border-radius:999px;background:var(--ink-2)}
.srch input{
  width:118px;
  min-height:40px;
  padding:0 13px;
  border:0;
  background:transparent;
  color:var(--fg);
  font:inherit;
  font-size:16px;
}
.srch input::placeholder{color:#7f759a}
.srch input:focus{outline:none}
.srch button{
  min-height:40px;
  padding:0 15px;
  border:0;
  border-left:1px solid var(--line);
  background:linear-gradient(180deg,var(--violet),#54009f);
  color:#fff;
  font:inherit;
  font-size:16px;
  cursor:pointer;
}
.srch button:hover{background:linear-gradient(180deg,var(--magenta),#a4009f)}

.hd-nav{padding:0 var(--pad)}
.nav{position:relative}
.nav summary{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:46px;
  padding:0 2px;
  cursor:pointer;
  list-style:none;
  color:var(--dim);
  font-size:16px;
  letter-spacing:.16em;
}
.nav summary::-webkit-details-marker{display:none}
.burger{display:block;width:20px;height:2px;background:var(--magenta);box-shadow:0 6px 0 var(--magenta),0 -6px 0 var(--magenta)}
.nav[open] summary{color:var(--magenta);text-shadow:0 0 12px var(--magenta)}
.nav menu{list-style:none;margin:0;padding:0 0 10px;display:grid;gap:2px}
.nav menu a{
  display:block;
  min-height:44px;
  padding:11px 12px;
  color:var(--fg);
  font-size:16px;
  text-decoration:none;
}
.nav menu a:hover,.nav menu a:focus-visible{
  color:#fff;
  background:rgba(255,0,255,.09);
  box-shadow:inset 2px 0 0 var(--magenta);
}

/* Hero */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  min-height:45vh;
  overflow:hidden;
  border-bottom:1px solid rgba(128,0,255,.35);
  background:linear-gradient(180deg,rgba(128,0,255,.16),rgba(13,13,13,0) 72%);
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(90deg,rgba(128,0,255,.20) 1px,transparent 1px),
    linear-gradient(180deg,rgba(255,0,255,.10) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
  -webkit-mask-image:radial-gradient(72% 72% at 50% 28%,#000 28%,transparent 100%);
  mask-image:radial-gradient(72% 72% at 50% 28%,#000 28%,transparent 100%);
}
.hero-in{
  position:relative;
  z-index:1;
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  max-width:920px;
  margin:0 auto;
  padding:clamp(24px,4vw,44px) var(--pad) 18px;
  text-align:center;
}
.hb{
  display:inline-block;
  margin:0 0 14px;
  padding:5px 14px;
  border:1px solid rgba(255,0,255,.7);
  border-radius:999px;
  color:#ffb3ff;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.18em;
  box-shadow:0 0 22px rgba(255,0,255,.35),inset 0 0 18px rgba(255,0,255,.18);
  animation:fl 5s ease-in-out infinite;
}
@keyframes fl{50%{transform:translateY(-6px)}}

.hero h1{
  position:relative;
  margin:0;
  padding:0 2px;
  color:#fff;
  font-size:clamp(27px,6.4vw,54px);
  font-weight:700;
  line-height:1.16;
  letter-spacing:.02em;
  text-shadow:0 0 26px rgba(255,0,255,.55),0 0 60px rgba(128,0,255,.45);
}
.glitch::before,.glitch::after{
  content:attr(data-text);
  position:absolute;
  left:0;
  top:0;
  width:100%;
  pointer-events:none;
}
.glitch::before{color:var(--magenta);opacity:.55;transform:translate(-2px,0);animation:gl 4.2s infinite}
.glitch::after{color:#b57bff;opacity:.5;transform:translate(2px,0);animation:gl 3.1s infinite reverse}
@keyframes gl{
  0%,92%,100%{clip-path:inset(0 0 0 0);transform:translate(-2px,0)}
  93%{transform:translate(-6px,2px)}
  96%{transform:translate(4px,-2px)}
}
.hero .hdesc{
  max-width:52ch;
  margin:14px auto 0;
  color:var(--dim);
  font-size:16px;
}
.hero-media{position:relative;z-index:1;margin-top:auto}
.hero-media:empty{height:clamp(40px,10vh,90px)}
.hero-img{
  display:block;
  width:100%;
  height:clamp(110px,20vh,190px);
  object-fit:cover;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 32%);
  mask-image:linear-gradient(180deg,transparent,#000 32%);
}

/* 版心：侧栏左、正文右 */
.shell{
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:clamp(20px,3vw,42px);
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:clamp(26px,4vw,50px) var(--pad) 64px;
}
.side{
  position:sticky;
  top:124px;
  padding:18px 16px;
  border-radius:var(--rad);
  background:var(--panel);
}
.side small{
  display:block;
  margin:0 0 6px;
  color:var(--magenta);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.26em;
}
.side h2{margin:0 0 14px;color:#fff;font-size:17px;letter-spacing:.1em}
.side-nav ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.side-nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 10px;
  color:#bfb6d6;
  font-size:16px;
  text-decoration:none;
}
.side-nav a:hover{color:#fff;background:rgba(128,0,255,.16);box-shadow:inset 2px 0 0 var(--magenta)}
.totop{
  display:block;
  margin-top:16px;
  min-height:44px;
  padding:11px 10px;
  border-radius:8px;
  background:#1b1526;
  color:var(--dim);
  font-size:16px;
  text-align:center;
  text-decoration:none;
}
.totop:hover{color:#fff;box-shadow:0 0 18px rgba(255,0,255,.35)}

main{min-width:0}
section{min-width:0}
.doc{max-width:74ch}
.doc article{
  scroll-margin-top:132px;
  padding-top:clamp(30px,4vw,46px);
  border-top:1px solid var(--line);
}
.doc article:first-child{border-top:0;padding-top:0}

.doc h2{
  position:relative;
  margin:0 0 .55em;
  padding-left:14px;
  color:#fff;
  font-size:clamp(20px,2.6vw,27px);
  line-height:1.3;
  letter-spacing:.02em;
  text-shadow:0 0 20px rgba(255,0,255,.5);
}
.doc h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.2em;
  bottom:.2em;
  width:3px;
  background:linear-gradient(180deg,var(--magenta),var(--violet));
  box-shadow:0 0 12px var(--magenta);
}
.doc h3{margin:1.4em 0 .4em;color:#ffd9ff;font-size:19px;line-height:1.4}
.doc p{margin:0 0 1em;color:#d9d3e7}
.doc ul,.doc ol{margin:0 0 1em;padding-left:1.3em}
.doc li{margin:.35em 0}
.doc li::marker{color:var(--magenta)}
.doc strong{color:#fff}
.doc a{color:#ff9cff;text-decoration:underline dotted;text-underline-offset:3px}
.doc a:hover{color:#fff;text-shadow:0 0 12px var(--magenta)}
.doc blockquote{
  margin:1.2em 0;
  padding:12px 16px;
  border-radius:var(--rad);
  background:#14101c;
  box-shadow:inset 3px 0 0 var(--violet);
  color:#cfc7e2;
}
.doc img{max-width:100%;height:auto;border-radius:var(--rad)}
.doc table{width:100%;border-collapse:collapse;font-size:16px}
.doc th,.doc td{padding:8px 10px;border:1px solid var(--line);text-align:left}
.doc code{
  padding:1px 5px;
  border-radius:4px;
  background:#1a1424;
  font-family:var(--mono);
  font-size:15px;
}
.doc hr{border:0;border-top:1px solid var(--line);margin:1.6em 0}

/* 页脚 */
.ft{
  margin-top:20px;
  padding:clamp(30px,4.6vw,50px) var(--pad) 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(128,0,255,.12),rgba(13,13,13,0));
}
.ft-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;max-width:1180px;margin:0 auto}
.ft dl{margin:0;padding:14px 16px;border-radius:var(--rad);background:var(--panel)}
.ft dt{color:var(--magenta);font-family:var(--mono);font-size:12px;letter-spacing:.24em}
.ft dd{margin:6px 0 0;color:var(--dim);font-size:16px}
.ft dd a{display:block;min-height:42px;padding:9px 0;color:#cfc7e2;text-decoration:none}
.ft dd a:hover{color:#fff;text-shadow:0 0 12px var(--magenta)}
.ft-mark{
  max-width:1180px;
  margin:clamp(18px,3vw,30px) auto 0;
  overflow:hidden;
  color:transparent;
  font-size:clamp(34px,10.5vw,110px);
  font-weight:700;
  line-height:.92;
  letter-spacing:.02em;
  text-align:center;
  white-space:nowrap;
  -webkit-text-stroke:1.5px rgba(128,0,255,.8);
}
.ft-bot{
  max-width:1180px;
  margin:12px auto 0;
  padding-top:14px;
  border-top:1px solid var(--line);
  color:var(--dim);
  font-size:16px;
  text-align:center;
}
.ft-bot p{margin:0}

/* 中等屏 */
@media (min-width:881px){
  .nav summary{min-height:42px}
  .nav menu{display:flex;flex-wrap:wrap;gap:4px;padding:0 0 8px}
  .nav menu a{padding:9px 12px}
  .nav menu a:hover,.nav menu a:focus-visible{box-shadow:none}
}

/* 窄屏 */
@media (max-width:880px){
  .brand{font-size:16px}
  .srch input{width:96px}
  .shell{grid-template-columns:minmax(0,1fr);gap:24px}
  main{order:1}
  .side{order:2;position:static}
  .doc{max-width:none}
  .ft-cols{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}

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