:root{
  --ink:#0d0d0d;
  --vio:#8000ff;
  --mag:#ff00ff;
  --txt:#ece5fa;
  --dim:#a99ec6;
  --line:rgba(128,0,255,.42);
  --r:10px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ui:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--ink);scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-bottom:calc(104px + env(safe-area-inset-bottom));
  font:400 1.02rem/1.75 var(--ui);
  color:var(--txt);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(128,0,255,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(128,0,255,.075) 1px,transparent 1px);
  background-size:64px 64px;
  background-attachment:fixed;
  overflow-x:hidden;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:80;
  pointer-events:none;
  opacity:.72;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.035) 0 1px,transparent 1px 4px);
}
img{display:block;max-width:100%;height:auto}
p{margin:0 0 1rem}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.24;letter-spacing:.01em}
a{color:inherit}
menu{margin:0;padding:0;list-style:none}
ul,ol{margin:0 0 1rem}
[id]{scroll-margin-top:1.4rem}
:focus-visible{outline:2px solid var(--mag);outline-offset:2px}

/* 顶栏 + 底部固定导航 */
.bar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.7rem;
  padding:.45rem clamp(.7rem,3.5vw,1.6rem) calc(.45rem + env(safe-area-inset-bottom));
  background:rgba(10,7,17,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  box-shadow:0 -16px 42px -20px rgba(128,0,255,.9);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  min-height:44px;
  padding:.35rem .4rem;
  font-family:var(--mono);
  font-size:.98rem;
  font-weight:700;
  letter-spacing:.22em;
  color:#fff;
  text-decoration:none;
  text-shadow:0 0 12px rgba(255,0,255,.7);
}
.mark{
  width:11px;height:11px;
  border:1px solid var(--mag);
  transform:rotate(45deg);
  box-shadow:0 0 10px rgba(255,0,255,.9),inset 0 0 6px rgba(255,0,255,.6);
}
.deck{position:relative}
.deck > summary{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  min-height:44px;
  padding:.5rem .85rem;
  cursor:pointer;
  list-style:none;
  border:1px solid var(--line);
  border-radius:var(--r);
  font-family:var(--mono);
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--txt);
  transition:border-color .2s,color .2s,background .2s;
}
.deck > summary::-webkit-details-marker{display:none}
.deck > summary:hover{border-color:var(--mag);color:#fff}
.deck[open] > summary{border-color:var(--mag);background:rgba(255,0,255,.14);color:#fff}
.burger{
  display:block;
  width:14px;height:2px;
  background:var(--mag);
  box-shadow:0 5px 0 var(--mag),0 -5px 0 var(--mag);
}
.deck-menu{
  position:absolute;
  right:0;
  bottom:calc(100% + .55rem);
  width:min(80vw,304px);
  max-height:66vh;
  overflow:auto;
  padding:.5rem;
  display:grid;
  gap:2px;
  background:rgba(12,8,20,.98);
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:0 0 0 1px rgba(255,0,255,.18),0 -18px 44px -22px rgba(255,0,255,.85);
}
.deck-menu a{
  display:flex;
  align-items:center;
  gap:.6rem;
  min-height:44px;
  padding:.5rem .65rem;
  font-size:.95rem;
  color:var(--txt);
  text-decoration:none;
  border:1px solid transparent;
  border-radius:8px;
  transition:border-color .18s,background .18s,color .18s;
}
.deck-menu a:hover,.deck-menu a:focus-visible{
  color:#fff;
  border-color:var(--mag);
  background:rgba(255,0,255,.1);
  text-shadow:0 0 10px rgba(255,0,255,.8);
}
.ic{
  flex:0 0 auto;
  width:7px;height:7px;
  border:1px solid var(--vio);
  transform:rotate(45deg);
}

/* Hero */
.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:grid;
  place-items:center;
  overflow:hidden;
  padding:clamp(2rem,9vw,5rem) clamp(1rem,5vw,3rem) clamp(6rem,14vw,9rem);
  text-align:center;
  border-bottom:1px solid rgba(128,0,255,.28);
}
.hero-fig{
  position:absolute;
  inset:0;
  margin:0;
  display:grid;
  place-items:center;
  pointer-events:none;
}
.ghost{
  font-family:var(--mono);
  font-weight:700;
  font-size:clamp(6rem,26vw,19rem);
  line-height:.9;
  letter-spacing:.05em;
  color:transparent;
  -webkit-text-stroke:1px rgba(255,0,255,.3);
  user-select:none;
}
.hero-fig::before,.hero-fig::after{
  content:"";
  position:absolute;
  width:clamp(46px,12vw,120px);
  height:clamp(46px,12vw,120px);
  border:1px solid rgba(255,0,255,.32);
}
.hero-fig::before{top:clamp(1rem,5vw,2.4rem);left:clamp(1rem,4vw,2rem);border-right:0;border-bottom:0}
.hero-fig::after{right:clamp(1rem,4vw,2rem);bottom:clamp(6rem,13vw,8.5rem);border-left:0;border-top:0}
.hero-core{position:relative;z-index:1;max-width:min(920px,94vw);margin:0 auto}
.glitch{
  position:relative;
  display:inline-block;
  max-width:100%;
  font-size:clamp(2rem,6.4vw,4.4rem);
  line-height:1.1;
  letter-spacing:.02em;
  color:#fff;
  text-shadow:0 0 12px rgba(128,0,255,.95),0 0 44px rgba(255,0,255,.5);
}
.glitch::before,.glitch::after{
  content:attr(data-text);
  position:absolute;
  left:0;right:0;top:0;
  opacity:0;
  pointer-events:none;
}
.glitch::before{color:var(--mag);clip-path:inset(0 0 58% 0);animation:gl-a 6s infinite}
.glitch::after{color:var(--vio);clip-path:inset(55% 0 0 0);animation:gl-b 6s infinite}
@keyframes gl-a{
  0%,88%,100%{opacity:0;transform:none}
  89%{opacity:.85;transform:translate(-3px,-2px) skewX(-6deg)}
  92%{opacity:.7;transform:translate(3px,1px) skewX(5deg)}
  95%{opacity:0;transform:none}
}
@keyframes gl-b{
  0%,86%,100%{opacity:0;transform:none}
  87%{opacity:.8;transform:translate(3px,2px) skewX(6deg)}
  91%{opacity:.6;transform:translate(-4px,-1px) skewX(-4deg)}
  94%{opacity:0;transform:none}
}
.hero-desc{
  max-width:52ch;
  margin:1.3rem auto 0;
  color:var(--dim);
  font-size:clamp(1rem,2.3vw,1.1rem);
}

/* 内容区骨架：正文 + 右侧栏 */
.shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 262px;
  gap:clamp(1.4rem,4vw,3rem);
  align-items:start;
  max-width:1100px;
  margin:0 auto;
  padding:clamp(2rem,5vw,4rem) clamp(1rem,4vw,2rem) 2.5rem;
}
.copy{min-width:0}
.copy > section{
  padding:2.1rem 0;
  border-top:1px solid rgba(128,0,255,.24);
}
.copy > section:first-child{padding-top:0;border-top:0}
.copy > section > *{max-width:72ch}
.copy h2{
  margin:0 0 .9rem;
  font-size:clamp(1.3rem,2.8vw,1.8rem);
  color:#fff;
  text-shadow:0 0 16px rgba(128,0,255,.55);
}
.copy h2 > span{position:relative;display:inline-block;padding-left:1.05rem}
.copy h2 > span::before{
  content:"";
  position:absolute;
  left:0;top:.42em;
  width:.42rem;height:.42rem;
  background:var(--mag);
  transform:rotate(45deg);
  box-shadow:0 0 10px var(--mag);
}
.copy h3{margin:1.4rem 0 .5rem;font-size:1.12rem;color:#f4edff}
.copy p{color:#ded5f0}
.copy ul,.copy ol{padding-left:1.15rem}
.copy li{margin:.32rem 0}
.copy a{color:#ff7dff;text-underline-offset:3px;text-decoration-color:rgba(255,0,255,.5)}
.copy a:hover{color:#fff}
.copy strong{color:#fff}
.copy blockquote{
  margin:1.2rem 0;
  padding:.15rem 0 .15rem 1rem;
  border-left:2px solid var(--vio);
  color:#cfc4e8;
}
.copy code,.copy pre{font-family:var(--mono);font-size:.9em}
.copy pre{
  overflow-x:auto;
  padding:.9rem;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(128,0,255,.08);
}
.copy table{width:100%;border-collapse:collapse;font-size:.95rem}
.copy th,.copy td{border:1px solid rgba(128,0,255,.3);padding:.5rem .6rem;text-align:left}
.copy img{margin:1rem 0;border:1px solid var(--line);border-radius:var(--r)}
.copy figure{margin:1rem 0}
.copy hr{margin:1.5rem 0;border:0;border-top:1px dashed rgba(255,0,255,.35)}

/* 右侧栏 */
.rail{
  position:sticky;
  top:1.4rem;
  padding:1rem .9rem;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(128,0,255,.07);
}
.rail-t{margin:0 0 .7rem;font-family:var(--mono);font-size:.78rem;letter-spacing:.24em;color:var(--mag)}
.rail-t > span{display:inline-block;text-shadow:0 0 10px rgba(255,0,255,.8)}
.rail-menu{display:grid;gap:1px;margin-bottom:.8rem}
.rail-menu a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.35rem .55rem;
  font-size:.92rem;
  color:var(--txt);
  text-decoration:none;
  border-left:1px solid transparent;
  transition:border-color .18s,color .18s,background .18s;
}
.rail-menu a:hover{
  color:#fff;
  border-left-color:var(--mag);
  background:rgba(255,0,255,.09);
  text-shadow:0 0 8px rgba(255,0,255,.7);
}
.rail-top{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  border:1px solid var(--line);
  border-radius:8px;
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.14em;
  color:var(--dim);
  text-decoration:none;
  transition:border-color .18s,color .18s;
}
.rail-top:hover{border-color:var(--mag);color:#fff}

/* 页脚 */
.base{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:2rem 2.5rem;
  padding:clamp(2rem,5vw,3.4rem) clamp(1rem,4vw,2rem) 1.4rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(128,0,255,.1),rgba(13,13,13,.99) 62%);
}
.f-brand{grid-area:1/1}
.f-sub{grid-area:2/1}
.f-links{grid-area:1/2/span 2/2}
.f-line{
  grid-area:3/1/4/3;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.8rem;
  padding-top:1rem;
  border-top:1px solid rgba(128,0,255,.24);
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.1em;
  color:var(--dim);
}
.f-cr{margin:0}
.f-top{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 .7rem;
  border:1px solid var(--line);
  border-radius:8px;
  text-decoration:none;
  color:var(--dim);
}
.f-top:hover{border-color:var(--mag);color:#fff}
.f-t{margin:0 0 .7rem;font-family:var(--mono);font-size:.8rem;letter-spacing:.22em;color:var(--mag)}
.f-t > span{display:inline-block;text-shadow:0 0 10px rgba(255,0,255,.8)}
.f-desc{max-width:46ch;color:var(--dim);font-size:.95rem}
.f-menu{display:grid;gap:1px}
.f-menu a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.3rem .5rem;
  font-size:.93rem;
  color:var(--txt);
  text-decoration:none;
  border-left:1px solid transparent;
  transition:border-color .18s,color .18s,background .18s;
}
.f-menu a:hover{color:#fff;border-left-color:var(--mag);background:rgba(255,0,255,.09)}
.subform{display:flex;flex-wrap:wrap;gap:.55rem;max-width:26rem}
.sub-in{
  flex:1 1 11rem;
  min-width:0;
  min-height:44px;
  padding:0 .8rem;
  font:400 .95rem/1 var(--ui);
  color:var(--txt);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r);
}
.sub-in::placeholder{color:rgba(169,158,198,.85)}
.sub-in:focus{outline:none;border-color:var(--mag);box-shadow:0 0 0 2px rgba(255,0,255,.22)}
.sub-btn{
  min-height:44px;
  padding:0 1.15rem;
  cursor:pointer;
  font-family:var(--mono);
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.14em;
  color:#fff;
  background:rgba(255,0,255,.15);
  border:1px solid var(--mag);
  border-radius:var(--r);
  transition:background .18s,box-shadow .18s;
}
.sub-btn:hover{background:rgba(255,0,255,.3);box-shadow:0 0 16px rgba(255,0,255,.55)}

/* 滚动揭示 + 动效降级 */
html.js [data-rv]{opacity:0;transform:translateY(16px);transition:opacity .62s ease,transform .62s ease}
html.js [data-rv].rv-in{opacity:1;transform:none}

@media (max-width:880px){
  .shell{grid-template-columns:1fr}
  .rail{position:static;order:2}
  .base{grid-template-columns:1fr;gap:1.8rem}
  .f-brand,.f-links,.f-sub,.f-line{grid-area:auto}
}
@media (max-width:520px){
  body{padding-bottom:calc(96px + env(safe-area-inset-bottom))}
  .hero{padding-bottom:clamp(6rem,20vw,8rem)}
  .ghost{font-size:clamp(5rem,30vw,9rem)}
  .brand{letter-spacing:.16em;font-size:.9rem}
  .deck > summary{padding:.5rem .7rem;letter-spacing:.1em}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js [data-rv]{opacity:1;transform:none;transition:none}
  .glitch::before,.glitch::after{animation:none;opacity:.5}
}
@media (hover:none){
  .deck-menu a:hover,.rail-menu a:hover,.f-menu a:hover{background:transparent}
}

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