:root{
  --red:#ff0000;
  --pink:#ff006e;
  --ink:#1a1a2e;
  --cyan:#00ffff;
  --bg:#0b0b16;
  --txt:#f3eef8;
  --dim:#a9a2bd;
  --line:rgba(255,0,110,.38);
  --line-soft:rgba(255,0,110,.18);
  --glass:rgba(255,255,255,.05);
  --font:'Kalam','Patrick Hand',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  background:var(--bg);
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.75;
  color:var(--txt);
  overflow-x:hidden;
  padding-bottom:calc(104px + env(safe-area-inset-bottom));
  background:
    radial-gradient(880px 520px at 84% -12%,rgba(255,0,110,.20),transparent 72%),
    radial-gradient(760px 460px at -8% 6%,rgba(255,0,0,.16),transparent 70%),
    linear-gradient(180deg,#0b0b16 0%,#12101f 48%,#0b0b16 100%);
  background-attachment:fixed;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:120;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,.30) 0 1px,rgba(0,0,0,0) 1px 3px);
  mix-blend-mode:multiply;
  opacity:.75;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--pink);text-decoration:none}
a:hover,a:focus-visible{color:var(--cyan)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
h1,h2,h3{line-height:1.35;letter-spacing:.02em}

/* ---------- 底部固定条 + 全屏菜单 ---------- */
.dock{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:200;
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 14px calc(9px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);
  background:rgba(11,11,22,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 -10px 34px rgba(255,0,110,.16);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:6px 10px;
  margin-right:auto;
  color:var(--txt);
  font-weight:700;
  letter-spacing:.16em;
  border:1px solid transparent;
}
.brand:hover{color:var(--txt);border-color:var(--line-soft)}
.brand-mark{width:26px;height:26px;object-fit:contain;filter:drop-shadow(0 0 8px var(--pink))}
.brand-name{
  font-size:1.02rem;
  text-shadow:0 0 12px rgba(255,0,110,.8),0 0 26px rgba(255,0,0,.45);
}
.burger{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:8px 12px;
  font-family:inherit;
  font-size:.94rem;
  letter-spacing:.12em;
  color:var(--txt);
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:0;
  cursor:pointer;
}
.burger:hover{border-color:var(--cyan);color:var(--cyan)}
.bars{display:inline-flex;flex-direction:column;justify-content:center;gap:3px;width:17px}
.bars i{display:block;height:2px;background:currentColor;transition:transform .25s ease,opacity .2s ease}
.dock.open .bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.dock.open .bars i:nth-child(2){opacity:0}
.dock.open .bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.cta{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 16px;
  font-size:.94rem;
  letter-spacing:.1em;
  color:#12030a;
  background:linear-gradient(120deg,var(--red),var(--pink));
  border:1px solid rgba(255,255,255,.28);
  box-shadow:0 0 18px rgba(255,0,110,.55);
}
.cta:hover,.cta:focus-visible{color:#12030a;box-shadow:0 0 28px rgba(255,0,110,.9)}
.menu{
  position:fixed;
  inset:0;
  z-index:150;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:72px 20px calc(120px + env(safe-area-inset-bottom));
  overflow:auto;
  background:
    radial-gradient(620px 420px at 50% 0%,rgba(255,0,110,.22),transparent 70%),
    rgba(9,9,19,.97);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  visibility:hidden;
  transform:translateY(100%);
  transition:transform .34s cubic-bezier(.2,.8,.2,1),visibility .34s;
}
.dock.open .menu{transform:none;visibility:visible}
.menu ul{
  list-style:none;
  margin:0;
  padding:0;
  width:100%;
  max-width:440px;
  display:grid;
  gap:10px;
  counter-reset:mi;
}
.menu li{opacity:0}
.dock.open .menu li{animation:pop .34s ease forwards;animation-delay:calc(var(--i,0) * 45ms)}
.menu a{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:50px;
  padding:12px 16px;
  color:var(--txt);
  font-size:1.06rem;
  letter-spacing:.08em;
  border:1px solid var(--line-soft);
  background:var(--glass);
}
.menu a::before{
  counter-increment:mi;
  content:counter(mi,decimal-leading-zero);
  font-size:.78rem;
  letter-spacing:.12em;
  color:var(--pink);
  text-shadow:0 0 10px var(--pink);
}
.menu a:hover,.menu a:focus-visible{
  color:var(--cyan);
  border-color:var(--cyan);
  box-shadow:0 0 22px rgba(0,255,255,.28) inset;
}
html.lock{overflow:hidden}
@keyframes pop{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  min-height:100svh;
  display:grid;
  place-items:center;
  padding:86px 20px 132px;
  text-align:center;
  overflow:hidden;
  isolation:isolate;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,0,110,.11) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,0,110,.11) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(circle at 50% 42%,#000 24%,transparent 76%);
  mask-image:radial-gradient(circle at 50% 42%,#000 24%,transparent 76%);
}
.hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:150px;
  z-index:0;
  background:linear-gradient(180deg,transparent,rgba(11,11,22,.9));
}
.art{position:absolute;inset:0;z-index:1;pointer-events:none}
.shot{
  position:absolute;
  width:40%;
  max-width:330px;
  height:auto;
  object-fit:cover;
  border:1px solid var(--line);
  box-shadow:0 0 42px rgba(255,0,110,.38);
  opacity:.5;
  filter:saturate(1.15) contrast(1.05);
}
.s1{left:-5%;top:11%;transform:rotate(-6deg)}
.s2{right:-5%;bottom:13%;transform:rotate(5deg)}
.hero-in{position:relative;z-index:2;max-width:740px}
.chip{
  display:inline-block;
  margin-bottom:18px;
  padding:5px 14px;
  font-size:.8rem;
  letter-spacing:.24em;
  color:var(--cyan);
  border:1px solid rgba(0,255,255,.45);
  background:rgba(0,255,255,.06);
  text-shadow:0 0 12px rgba(0,255,255,.7);
}
.hero h1{
  margin:0 0 18px;
  font-size:clamp(2rem,7vw,3.5rem);
  letter-spacing:.06em;
  color:#fff;
  text-shadow:
    0 0 12px rgba(255,0,110,.95),
    0 0 34px rgba(255,0,0,.6),
    3px 0 0 rgba(255,0,0,.75),
    -3px 0 0 rgba(0,255,255,.55);
  animation:jitter 7s steps(1) infinite;
}
@keyframes jitter{
  0%,86%,100%{transform:none}
  88%{transform:skewX(-2.5deg) translateX(-2px)}
  90%{transform:translateX(3px)}
  92%{transform:skewX(1.6deg)}
  94%{transform:none}
}
.lead{
  margin:0 auto 26px;
  max-width:44ch;
  color:var(--dim);
  font-size:1rem;
}
.go{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:12px 28px;
  font-size:1rem;
  letter-spacing:.16em;
  color:#12030a;
  background:linear-gradient(120deg,var(--red),var(--pink));
  border:1px solid rgba(255,255,255,.32);
  box-shadow:0 0 24px rgba(255,0,110,.6);
}
.go:hover,.go:focus-visible{color:#12030a;box-shadow:0 0 40px rgba(255,0,110,.95)}

/* ---------- 正文骨架 ---------- */
.wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 272px;
  gap:26px;
  align-items:start;
  max-width:1120px;
  margin:0 auto;
  padding:0 20px 40px;
}
.body{min-width:0}
.prose{
  counter-reset:sec;
  padding:clamp(20px,3.4vw,42px);
  border:1px solid var(--line-soft);
  border-radius:0;
  background:linear-gradient(160deg,rgba(255,255,255,.062),rgba(255,255,255,.022));
  -webkit-backdrop-filter:blur(9px);
  backdrop-filter:blur(9px);
  box-shadow:0 0 0 1px rgba(255,255,255,.03) inset,0 22px 60px rgba(0,0,0,.45);
}
.prose > div{counter-increment:sec;scroll-margin-top:64px}
.prose > div + div{
  margin-top:46px;
  padding-top:38px;
  border-top:1px dashed var(--line-soft);
}
.prose h2{
  margin:0 0 16px;
  font-size:clamp(1.28rem,2.6vw,1.62rem);
  letter-spacing:.03em;
  color:#fff;
  text-shadow:0 0 14px rgba(255,0,110,.65);
}
.prose h2 > span,.prose h3 > span{display:inline}
.prose h2 > span::before{
  content:"";
  display:inline-block;
  width:11px;height:11px;
  margin-right:12px;
  vertical-align:.06em;
  background:linear-gradient(135deg,var(--red),var(--pink));
  box-shadow:0 0 14px var(--pink);
}
.prose h3{
  margin:26px 0 12px;
  font-size:1.12rem;
  color:#ffd9e6;
  text-shadow:0 0 12px rgba(255,0,110,.4);
}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:1.3em}
.prose li{margin:0 0 8px}
.prose li::marker{color:var(--pink)}
.prose img{
  margin:18px 0;
  border:1px solid var(--line-soft);
  box-shadow:0 0 26px rgba(255,0,110,.2);
}
.prose a{
  border-bottom:1px solid var(--line);
}
.prose a:hover{border-color:var(--cyan)}
.prose blockquote{
  margin:20px 0;
  padding:12px 18px;
  border-left:2px solid var(--pink);
  background:rgba(255,0,110,.07);
  color:var(--dim);
}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.9em;
  padding:1px 6px;
  color:var(--cyan);
  background:rgba(0,255,255,.08);
}
.prose table{width:100%;border-collapse:collapse;font-size:.96rem}
.prose th,.prose td{border:1px solid var(--line-soft);padding:8px 10px;text-align:left}
.prose th{color:#fff;background:rgba(255,0,110,.12)}
.prose hr{border:0;border-top:1px dashed var(--line-soft);margin:26px 0}

/* ---------- 右侧栏 ---------- */
.side{
  position:sticky;
  top:22px;
  display:grid;
  gap:16px;
}
.panel{
  padding:16px 18px 18px;
  border:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.panel h2{
  margin:0 0 12px;
  font-size:.96rem;
  letter-spacing:.16em;
  color:var(--cyan);
  text-shadow:0 0 12px rgba(0,255,255,.5);
}
.panel h2 > span::before{
  content:"";
  display:inline-block;
  width:8px;height:8px;
  margin-right:9px;
  vertical-align:.12em;
  background:var(--cyan);
  box-shadow:0 0 12px var(--cyan);
}
.toc{
  list-style:none;
  margin:0;
  padding:0;
  counter-reset:tc;
  display:grid;
  gap:2px;
}
.toc a{
  display:flex;
  align-items:center;
  gap:9px;
  min-height:40px;
  padding:6px 4px;
  color:var(--txt);
  font-size:.94rem;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.toc a::before{
  counter-increment:tc;
  content:counter(tc,decimal-leading-zero);
  font-size:.72rem;
  color:var(--pink);
  letter-spacing:.1em;
}
.toc a:hover,.toc a:focus-visible{color:var(--cyan)}
.host{margin:0 0 12px;font-size:.86rem;word-break:break-all;color:var(--dim)}
.host code{padding:0;background:none;color:var(--cyan)}
.top{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:6px 12px;
  font-size:.9rem;
  letter-spacing:.1em;
  color:var(--txt);
  border:1px solid var(--line);
}
.top:hover,.top:focus-visible{color:var(--cyan);border-color:var(--cyan)}

/* ---------- 页脚 ---------- */
.foot-wrap{
  border-top:1px solid var(--line-soft);
  margin-top:8px;
  padding:22px 20px 30px;
  background:rgba(9,9,18,.55);
}
.foot{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:baseline;
  gap:10px 34px;
  max-width:1120px;
  margin:0 auto 12px;
}
.foot dl{margin:0;display:flex;align-items:baseline;gap:8px}
.foot dt{font-size:.76rem;letter-spacing:.2em;color:var(--pink);text-shadow:0 0 10px rgba(255,0,110,.6)}
.foot dd{margin:0;font-size:.9rem;color:var(--dim);word-break:break-all}
.copy{
  margin:0;
  text-align:center;
  font-size:.82rem;
  letter-spacing:.16em;
  color:rgba(169,162,189,.75);
}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr);gap:20px;padding-bottom:28px}
  .side{position:static;grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:16.5px}
  .shot{width:52%;opacity:.38}
  .s1{left:-14%;top:6%}
  .s2{right:-14%;bottom:10%}
  .hero{padding:72px 18px 120px;place-items:center}
  .hero h1{font-size:clamp(1.8rem,10vw,2.5rem)}
  .side{grid-template-columns:1fr}
  .burger-txt{display:none}
  .burger{padding:10px}
  .cta{padding:10px 13px;font-size:.88rem;letter-spacing:.06em}
  .brand-name{font-size:.95rem;letter-spacing:.1em}
  .foot{gap:8px 20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .menu,.bars i{transition:none}
  .dock.open .menu li{animation:none;opacity:1}
  .hero h1{animation:none}
}

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