:root{
  --neon:#00ff80;
  --blue:#0000ff;
  --ink:#000000;
  --paper:#e8e8e6;
  --w:#ffffff;
  --line:3px solid #000000;
}
*{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  background-color:var(--paper);
  background-image:
    linear-gradient(to right,rgba(0,0,0,.075) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(0,0,0,.075) 1px,transparent 1px);
  background-size:40px 40px;
  color:var(--ink);
  font-family:"DM Sans",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.62;
  font-weight:500;
  overflow-x:hidden;
}
a{color:var(--blue)}
a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
p{margin:0 0 16px}
img{max-width:100%}

/* ---------- 顶部 ---------- */
.top{
  position:sticky;
  top:0;
  z-index:20;
  background:var(--w);
  border-bottom:4px solid var(--ink);
}
.ticker{
  margin:0;
  background:var(--ink);
  color:var(--neon);
  font-size:.8rem;
  line-height:1.5;
  letter-spacing:.14em;
  padding:7px 16px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  font-weight:500;
}
.bar{
  background:var(--neon);
  border-bottom:3px solid var(--ink);
  padding:8px 16px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:4px 0;
  color:var(--ink);
  text-decoration:none;
  font-weight:700;
  font-size:1.55rem;
  letter-spacing:-.045em;
}
.logo-blk{
  display:block;
  width:20px;
  height:20px;
  background:var(--blue);
  border:3px solid var(--ink);
  box-shadow:4px 4px 0 var(--ink);
}
.nav{
  background:var(--w);
  padding:8px 16px;
}
.menu-btn{
  display:inline-block;
  list-style:none;
  cursor:pointer;
  min-height:44px;
  padding:10px 18px;
  border:3px solid var(--ink);
  background:var(--ink);
  color:var(--neon);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.16em;
}
.menu-btn::-webkit-details-marker{display:none}
.menu-btn::after{content:" +"}
details[open] > .menu-btn::after{content:" -"}
.menu-list{
  list-style:none;
  margin:0;
  padding:10px 0 2px;
}
.menu-list li{margin:0 0 8px}
.menu-a{
  display:block;
  min-height:44px;
  padding:11px 14px;
  border:3px solid var(--ink);
  background:var(--w);
  color:var(--ink);
  text-decoration:none;
  font-weight:700;
  font-size:.98rem;
}
.menu-a:hover,
.menu-a:focus{
  background:var(--blue);
  color:var(--w);
  box-shadow:5px 5px 0 var(--ink);
  transform:translate(-2px,-2px);
}

/* ---------- 主体网格 ---------- */
.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:24px 16px 64px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:26px;
  align-items:start;
}
.hero{
  grid-column:1 / -1;
  min-height:45vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:20px;
  padding:30px 20px;
  text-align:center;
  background:var(--neon);
  border:4px solid var(--ink);
  box-shadow:11px 11px 0 var(--ink);
}
.hero-h{
  margin:0;
  font-size:clamp(2rem,6.6vw,4rem);
  line-height:1.02;
  letter-spacing:-.05em;
  font-weight:700;
  color:var(--ink);
  overflow-wrap:break-word;
  max-width:22ch;
}
.hero-fig{
  margin:0;
  width:100%;
  max-width:640px;
}
.hero-fig img{
  display:block;
  width:100%;
  height:auto;
  border:4px solid var(--ink);
  background:var(--w);
}

/* ---------- 正文 ---------- */
.body{
  grid-column:1;
  min-width:0;
  background:var(--w);
  border:4px solid var(--ink);
  border-radius:4px;
  box-shadow:0 6px 0 var(--ink),0 14px 28px rgba(0,0,0,.16);
}
.body div{
  padding:28px 20px;
  border-top:4px solid var(--ink);
  scroll-margin-top:180px;
}
.body div:first-child{border-top:0}
.body small{
  display:inline-block;
  margin-bottom:6px;
  padding:3px 9px;
  background:var(--blue);
  color:var(--w);
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.2em;
  overflow-wrap:break-word;
}
.body h2{
  margin:0 0 18px;
  padding:11px 14px;
  background:var(--neon);
  border-left:12px solid var(--ink);
  border-radius:4px;
  box-shadow:5px 5px 0 var(--ink);
  font-size:clamp(1.35rem,3.4vw,1.9rem);
  line-height:1.2;
  letter-spacing:-.035em;
  font-weight:700;
  overflow-wrap:break-word;
}
.body h3{
  display:inline-block;
  margin:26px 0 10px;
  padding:6px 12px;
  background:var(--ink);
  color:var(--neon);
  font-size:1.02rem;
  line-height:1.4;
  letter-spacing:.02em;
  overflow-wrap:break-word;
}
.body h4{
  margin:20px 0 8px;
  font-size:1rem;
  letter-spacing:.02em;
  border-bottom:2px solid var(--ink);
  padding-bottom:4px;
}
.body a{
  color:var(--blue);
  font-weight:700;
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}
.body a:hover{background:var(--neon);color:var(--ink)}
.body ul,.body ol{margin:0 0 16px;padding-left:24px}
.body li{margin:0 0 8px}
.body strong{font-weight:700;background:var(--neon)}
.body img{
  display:block;
  width:auto;
  max-width:100%;
  height:auto;
  margin:0 0 16px;
  border:3px solid var(--ink);
  border-radius:4px;
}
.body figure{margin:0 0 16px}
.body figcaption{font-size:.85rem;color:#444;margin-top:6px}
.body blockquote{
  margin:0 0 16px;
  padding:14px 16px;
  background:#f2f2f2;
  border-left:8px solid var(--blue);
  border-radius:4px;
}
.body blockquote p:last-child{margin:0}
.body table{
  width:100%;
  border-collapse:collapse;
  margin:0 0 16px;
  font-size:.95rem;
}
.body th,.body td{
  border:2px solid var(--ink);
  padding:8px 10px;
  text-align:left;
  overflow-wrap:break-word;
}
.body th{background:var(--neon);font-weight:700}
.body hr{border:0;border-top:3px solid var(--ink);margin:24px 0}
.body code,.body pre{
  font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  font-size:.9em;
}
.body pre{
  overflow-x:auto;
  padding:12px;
  background:#111;
  color:var(--neon);
}

/* ---------- 侧栏 ---------- */
.rail{
  grid-column:2;
  position:sticky;
  top:170px;
  background:var(--ink);
  color:var(--w);
  border:4px solid var(--ink);
  border-radius:4px;
  box-shadow:9px 9px 0 var(--blue);
  padding:18px 16px 20px;
}
.rail-k{
  display:block;
  margin-bottom:6px;
  color:var(--neon);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.22em;
}
.rail-h{
  margin:0 0 16px;
  padding-bottom:10px;
  border-bottom:3px solid var(--neon);
  color:var(--w);
  font-size:1.3rem;
  letter-spacing:-.02em;
}
.rail-menu{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:7px;
}
.rail-menu a{
  display:block;
  min-height:44px;
  padding:11px 10px;
  border:2px solid #3a3a3a;
  color:var(--w);
  text-decoration:none;
  font-size:.92rem;
  font-weight:500;
}
.rail-menu a:hover,
.rail-menu a:focus{
  background:var(--neon);
  border-color:var(--neon);
  color:var(--ink);
  font-weight:700;
  box-shadow:4px 4px 0 var(--w);
}

/* ---------- 页脚 ---------- */
.foot{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:14px 24px;
  margin:0;
  padding:30px 16px 20px;
  background:var(--ink);
  color:#cfcfcf;
  border-top:8px solid var(--neon);
}
.foot-brand{
  flex:1 0 100%;
  margin:0;
  font-size:clamp(2.4rem,13vw,8rem);
  line-height:.86;
  letter-spacing:-.06em;
  font-weight:700;
  color:var(--neon);
  word-break:break-word;
}
.foot-meta{
  order:2;
  flex:1 1 auto;
  font-size:.82rem;
  letter-spacing:.06em;
}
.foot-top{
  order:3;
  margin-left:auto;
  font-size:.82rem;
}
.foot-top a{
  display:inline-block;
  min-height:44px;
  padding:12px 16px;
  border:2px solid var(--neon);
  color:var(--neon);
  text-decoration:none;
  font-weight:700;
  letter-spacing:.08em;
}
.foot-top a:hover,
.foot-top a:focus{background:var(--neon);color:var(--ink)}

/* ---------- 动效 ---------- */
@keyframes rev{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:translateY(0)}
}
.will-rev{opacity:0}
.will-rev.rev{animation:rev .3s steps(4,end) forwards}

/* ---------- 桌面 ---------- */
@media (min-width:880px){
  .menu-btn{display:none}
  .menu-list{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    padding:0;
    margin:0;
  }
  .menu:not([open]) > .menu-list{display:flex}
  .menu-list li{margin:0}
  .menu-a{font-size:.95rem;padding:10px 13px}
  .bar{padding:8px 24px}
  .nav{padding:8px 24px}
  .wrap{padding:32px 24px 80px}
  .body div{padding:32px 28px}
}

/* ---------- 移动 ---------- */
@media (max-width:879px){
  .wrap{grid-template-columns:1fr}
  .hero,.body,.rail{grid-column:1}
  .rail{position:static}
  .hero{min-height:40vh;padding:26px 16px;box-shadow:8px 8px 0 var(--ink)}
  .body{box-shadow:0 5px 0 var(--ink),0 10px 18px rgba(0,0,0,.14)}
  .body div{padding:24px 16px;scroll-margin-top:150px}
  .foot-brand{font-size:clamp(2.2rem,15vw,4rem)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .will-rev{opacity:1 !important;transform:none !important;animation:none !important}
  *{transition:none !important;animation:none !important}
}

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