:root{
  --ink:#192617;
  --ink-deep:#0d150d;
  --neon:#87ff71;
  --cyan:#01cdfe;
  --pink:#ff71ce;
  --purple:#b967ff;
  --paper:#e6fbdd;
  --line:rgba(135,255,113,.34);
  --line-soft:rgba(1,205,254,.3);
  --rail:264px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  color:var(--paper);
  font-family:'VT323',ui-monospace,"SFMono-Regular",Consolas,"Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:18px;
  line-height:1.78;
  letter-spacing:.2px;
  background:
    radial-gradient(120% 62% at 52% -12%,rgba(255,113,206,.3),transparent 62%),
    radial-gradient(90% 52% at 88% 0%,rgba(185,103,255,.24),transparent 64%),
    linear-gradient(180deg,#1f3320 0%,var(--ink) 42%,var(--ink-deep) 100%);
  background-attachment:fixed;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(135,255,113,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(135,255,113,.075) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),rgba(0,0,0,.2));
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),rgba(0,0,0,.2));
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:4;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,0) 0 2px,rgba(0,0,0,.16) 2px 4px);
  opacity:.5;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--cyan)}
a:hover{color:var(--neon)}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip{
  position:absolute;left:10px;top:-64px;z-index:9;
  background:var(--neon);color:#10200f;text-decoration:none;
  padding:10px 14px;border-radius:4px;font-size:16px;
  transition:top .18s ease;
}
.skip:focus{top:10px}

/* ---------- 骨架：左栏 + 正文列 ---------- */
.shell{
  position:relative;z-index:1;
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  align-items:start;
}

/* ---------- 左栏 ---------- */
.rail{
  position:sticky;top:0;
  height:100vh;overflow-y:auto;
  display:flex;flex-direction:column;gap:12px;
  padding:16px 16px 28px;
  border-right:2px solid var(--line);
  background:linear-gradient(180deg,rgba(13,21,13,.94),rgba(25,38,23,.7));
}
.brand-row{display:block}
.brand{
  display:flex;align-items:center;gap:10px;min-height:44px;
  text-decoration:none;color:var(--paper);
}
.brand-mark{
  width:22px;height:22px;flex:0 0 auto;border-radius:3px;
  border:2px solid var(--neon);
  background:linear-gradient(135deg,var(--neon),var(--cyan) 52%,var(--pink));
}
.brand-name{
  font-size:15px;font-weight:700;line-height:1.5;letter-spacing:.08em;
  color:var(--neon);
  text-shadow:0 0 10px rgba(135,255,113,.55);
}
.brand:hover .brand-name{color:var(--cyan)}

.search-row{display:block}
.search{display:flex;gap:6px}
.search input{
  flex:1 1 auto;min-width:0;height:44px;padding:0 10px;
  background:rgba(1,205,254,.08);
  border:2px solid var(--line-soft);border-radius:4px;
  color:var(--paper);font:inherit;font-size:16px;
}
.search input::placeholder{color:rgba(230,251,221,.5)}
.search button{
  height:44px;padding:0 12px;cursor:pointer;
  background:transparent;border:2px solid var(--neon);border-radius:4px;
  color:var(--neon);font:inherit;font-size:16px;
}
.search button:hover,.search button:focus-visible{background:var(--neon);color:#10200f}
.search-tip{margin:0;min-height:24px;font-size:15px;line-height:1.5;color:var(--cyan)}

.rail-h{
  margin:6px 0 0;
  font-size:17px;line-height:1.5;letter-spacing:.12em;
  color:var(--neon);
  text-shadow:0 0 8px rgba(135,255,113,.4);
}
.subtitle{
  margin:2px 0 0;
  font-size:15px;line-height:1.6;
  color:rgba(230,251,221,.72);
}
.nav-list{
  list-style:none;margin:8px 0 0;padding:0;
  display:flex;flex-direction:column;gap:6px;
}
.nav-list a{
  display:flex;align-items:center;gap:10px;
  min-height:44px;padding:6px 10px;
  font-size:16px;line-height:1.4;text-decoration:none;
  color:var(--paper);
  border:2px solid transparent;border-left:3px solid var(--line);
  border-radius:4px;
}
.nav-list a:hover,.nav-list a:focus-visible{
  color:var(--neon);border-color:var(--line);
  background:rgba(135,255,113,.09);
  text-shadow:0 0 8px rgba(135,255,113,.6);
}
.nav-list a.is-active{
  color:var(--cyan);border-left-color:var(--cyan);
  background:rgba(1,205,254,.1);
}
.ico{
  width:8px;height:8px;flex:0 0 auto;
  background:var(--neon);border-radius:1px;
}
.nav-list a.is-active .ico{background:var(--cyan)}

/* ---------- 正文列 ---------- */
main{min-width:0}
.wrap{max-width:830px;margin:0 auto;padding:22px 22px 12px}

/* 首屏 */
.hero{
  position:relative;overflow:hidden;
  min-height:45vh;
  display:flex;align-items:flex-end;justify-content:flex-end;
  border:2px solid var(--line);border-radius:4px;
  clip-path:polygon(0 0,100% 0,100% 92%,0 100%);
  margin-bottom:28px;
  background:linear-gradient(150deg,rgba(185,103,255,.4),rgba(1,205,254,.28) 55%,rgba(135,255,113,.24));
}
.hero-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;opacity:.5;filter:saturate(1.3) hue-rotate(-6deg);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(255deg,rgba(25,38,23,.96) 6%,rgba(25,38,23,.36) 62%,rgba(255,113,206,.2)),
    linear-gradient(180deg,rgba(1,205,254,.14),transparent 55%);
}
.hero-text{
  position:relative;z-index:2;
  max-width:580px;text-align:right;
  padding:26px 20px 46px;
}
.eyebrow{
  margin:0 0 10px;
  font-size:15px;letter-spacing:.24em;
  color:var(--cyan);
  text-shadow:0 0 10px rgba(1,205,254,.6);
}
h1{
  margin:0;
  font-size:31px;line-height:1.45;letter-spacing:.05em;
  color:var(--neon);
  text-shadow:0 0 12px rgba(135,255,113,.6),0 0 30px rgba(1,205,254,.35);
  animation:huePulse 9s linear infinite;
}
@keyframes huePulse{
  0%,100%{filter:hue-rotate(0deg)}
  50%{filter:hue-rotate(-18deg)}
}
.lede{
  margin:12px 0 0;
  font-size:16px;line-height:1.65;
  color:rgba(230,251,221,.88);
}

/* 正文块 */
.content-block{margin-top:6px}
.prose{display:block}
.prose div{
  position:relative;
  margin:0 0 26px;padding:22px 20px;
  border:2px solid var(--line);border-radius:4px;
  background:rgba(13,21,13,.55);
  scroll-margin-top:16px;
}
.prose div::before{
  content:"";position:absolute;left:-2px;top:-2px;
  width:66px;height:3px;background:var(--cyan);
}
.prose div:last-child{margin-bottom:8px}
.prose h2{
  margin:0 0 12px;font-size:22px;line-height:1.5;letter-spacing:.05em;
  color:var(--neon);text-shadow:0 0 10px rgba(135,255,113,.45);
}
.prose h3{
  margin:22px 0 10px;font-size:19px;line-height:1.55;letter-spacing:.04em;
  color:var(--cyan);
}
.prose p{margin:0 0 14px}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{margin:0 0 16px;padding-left:1.4em}
.prose li{margin:0 0 8px}
.prose li::marker{color:var(--neon)}
.prose strong{color:var(--neon)}
.prose em{color:var(--cyan);font-style:normal}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--neon)}
.prose blockquote{
  margin:0 0 16px;padding:12px 16px;
  border-left:3px solid var(--pink);
  background:rgba(255,113,206,.08);
  color:rgba(230,251,221,.92);
}
.prose code{
  font-family:'VT323',ui-monospace,monospace;
  background:rgba(1,205,254,.12);
  border:1px solid var(--line-soft);border-radius:3px;
  padding:0 5px;font-size:16px;
}
.prose pre{
  overflow-x:auto;padding:14px;
  border:2px solid var(--line-soft);border-radius:4px;
  background:rgba(13,21,13,.8);
}
.prose pre code{border:0;background:none;padding:0}
.prose table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:16px}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.prose th{background:rgba(135,255,113,.1);color:var(--neon)}
.prose hr{border:0;border-top:2px dashed var(--line);margin:20px 0}
.prose figure{margin:0 0 16px}
.prose figcaption{font-size:15px;color:rgba(230,251,221,.65);margin-top:6px}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;z-index:1;
  margin-top:34px;
  border-top:2px solid var(--line);
  background:linear-gradient(180deg,rgba(1,205,254,.07),transparent);
}
.foot-inner{
  max-width:1090px;margin:0 auto;padding:18px 22px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 26px;
}
.foot-id{min-width:0;max-width:52ch}
.foot address{
  font-style:normal;font-size:16px;line-height:1.65;
  color:rgba(230,251,221,.82);
}
.copy{margin:6px 0 0;font-size:15px;color:rgba(230,251,221,.55)}
.foot-links{
  list-style:none;margin:0;padding:0;
  display:flex;flex-wrap:wrap;gap:2px 6px;
}
.foot-links a{
  display:inline-flex;align-items:center;min-height:44px;padding:0 10px;
  font-size:16px;text-decoration:none;color:var(--cyan);
  border:2px solid transparent;border-radius:4px;
}
.foot-links a:hover,.foot-links a:focus-visible{color:var(--neon);border-color:var(--line)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 窄屏 ---------- */
@media (max-width:860px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .rail{
    position:static;height:auto;
    border-right:0;border-bottom:2px solid var(--line);
    padding:14px 14px 18px;gap:10px;
  }
  .nav-list{display:grid;grid-template-columns:1fr 1fr;gap:6px}
  .wrap{padding:16px 14px 8px}
  .hero{min-height:40vh;margin-bottom:22px}
  .hero-text{max-width:none;text-align:left;padding:20px 14px 36px}
  h1{font-size:25px}
  .prose div{padding:18px 14px}
  .foot-inner{padding:16px 14px}
  .foot-links{width:100%;justify-content:flex-start}
}
@media (max-width:420px){
  .brand-name{font-size:14px}
  h1{font-size:23px}
  .prose h2{font-size:20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  h1{animation:none}
}

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