:root{
  --bg:#000000;
  --panel:#0b0b0b;
  --panel2:#121212;
  --line:#262626;
  --line2:#343434;
  --ink:#e9e9e9;
  --dim:#9a9a9a;
  --neon:#4ef0a8;
  --blue:#6d8cff;
  --r:10px;
}
*,*::before,*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  color-scheme:dark;
}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Space Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',monospace;
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--neon);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px}
h1,h2,h3{line-height:1.28;margin:0 0 .6em;letter-spacing:.01em}
button,input{font-family:inherit}
.sr{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;
}

/* 顶栏 */
.top{
  position:sticky;top:0;z-index:30;
  background:#000;
  border-bottom:1px solid var(--line);
}
.bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:12px;
  max-width:1200px;
  margin:0 auto;
  padding:9px 16px;
}
.bar__brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 6px;
  font-size:19px;
  font-weight:700;
  letter-spacing:.09em;
  color:#fff;
  white-space:nowrap;
  text-shadow:0 0 12px rgba(78,240,168,.5);
}
.bar__brand:hover{text-decoration:none;color:var(--neon)}
.bar__side{display:flex;align-items:center;gap:8px;min-width:0}
.bar__side--l{justify-self:start}
.bar__side--r{justify-self:end}

/* 菜单 */
.menu{position:relative}
.menu__btn{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:10px 13px;
  font-size:16px;
  color:#dcdcdc;
  background:var(--panel);
  border:1px solid var(--line2);
  border-radius:var(--r);
  transition:border-color .18s ease,color .18s ease;
}
.menu__btn::-webkit-details-marker{display:none}
.menu__btn:hover,.menu[open] > .menu__btn{
  border-color:var(--neon);
  color:#fff;
}
.menu__ico{
  position:relative;
  flex:none;
  width:12px;height:12px;
  border:1px solid var(--neon);
  border-radius:2px;
}
.menu__ico::after{
  content:"";position:absolute;left:2px;right:2px;top:4px;
  height:1px;background:var(--neon);
}
.menu__list{
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  z-index:40;
  margin:0;
  padding:6px;
  min-width:190px;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:2px;
  background:var(--panel);
  border:1px solid var(--line2);
  border-radius:var(--r);
}
.menu--b .menu__list{left:auto;right:0}
.menu__list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:11px 12px;
  font-size:16px;
  color:#dcdcdc;
  border-radius:8px;
  transition:background .16s ease,color .16s ease;
}
.menu__list a::before{content:"▹";margin-right:9px;color:var(--neon)}
.menu__list a:hover{background:#181818;color:#fff;text-decoration:none}

/* 搜索 */
.search{display:flex;align-items:center;gap:6px;margin:0;min-width:0}
.search input{
  width:132px;
  min-height:44px;
  padding:8px 11px;
  font-size:16px;
  color:#fff;
  background:var(--panel);
  border:1px solid var(--line2);
  border-radius:var(--r);
}
.search input::placeholder{color:#7d7d7d}
.search button{
  min-height:44px;
  padding:8px 13px;
  font-size:16px;
  color:var(--neon);
  background:var(--panel);
  border:1px solid var(--neon);
  border-radius:var(--r);
  cursor:pointer;
  transition:background .16s ease,color .16s ease;
}
.search button:hover{background:var(--neon);color:#000}

/* 首屏 */
.hero{padding:clamp(18px,4vw,54px) 16px clamp(16px,3vw,40px)}
.hero__box{
  max-width:1200px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:clamp(18px,3vw,46px);
  align-items:center;
  min-height:62vh;
}
.hero__h1{
  margin:0 0 16px;
  font-size:clamp(29px,5.2vw,58px);
  color:#fff;
  letter-spacing:.005em;
  text-shadow:0 0 18px rgba(78,240,168,.26);
}
.hero__lede{
  margin:0 0 24px;
  max-width:46ch;
  font-size:17px;
  color:var(--dim);
}
.hero__go{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:46px;
  padding:11px 20px;
  font-size:16px;
  color:var(--neon);
  border:1px solid var(--neon);
  border-radius:var(--r);
  transition:background .18s ease,color .18s ease;
}
.hero__go::after{content:"↓"}
.hero__go:hover{background:var(--neon);color:#000;text-decoration:none}
.hero__art{
  margin:0;
  border:1px solid var(--line2);
  border-radius:var(--r);
  overflow:hidden;
  aspect-ratio:4/3;
  background:repeating-linear-gradient(135deg,#0e0e0e 0 10px,#090909 10px 20px);
}
.hero__img{width:100%;height:100%;object-fit:cover;filter:brightness(.92)}
.band{
  height:16px;
  background:linear-gradient(90deg,var(--neon) 0%,var(--blue) 55%,#1b1b1b 100%);
  clip-path:polygon(0 62%,100% 0,100% 100%,0 100%);
}

/* 正文骨架 */
main{padding:clamp(24px,4vw,56px) 16px 64px}
.wrap{
  max-width:1200px;
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(0,1fr) 262px;
  gap:clamp(22px,4vw,48px);
  align-items:start;
}
.main-col{min-width:0}
.prose{min-width:0;max-width:70ch;font-size:17px}
.prose > div{
  position:relative;
  padding-bottom:clamp(24px,4vw,42px);
  margin-bottom:clamp(24px,4vw,42px);
  border-bottom:1px solid #191919;
  scroll-margin-top:104px;
}
.prose > div:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:8px}
.prose > div:first-child{padding-top:0}
.prose h2{
  display:flex;
  align-items:baseline;
  gap:11px;
  margin:0 0 .5em;
  font-size:clamp(21px,2.9vw,28px);
  color:#fff;
}
.prose h2::before{
  content:"";
  flex:none;
  width:10px;height:10px;
  border-radius:2px;
  background:var(--neon);
  box-shadow:0 0 10px rgba(78,240,168,.6);
}
.prose h3{margin-top:1.4em;font-size:19px;color:#fff}
.prose p{margin:0 0 1em;color:#c6c6c6}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.3em;color:#c6c6c6}
.prose li{margin:.35em 0}
.prose strong{color:#fff}
.prose a{border-bottom:1px solid rgba(78,240,168,.45)}
.prose a:hover{border-bottom-color:var(--neon)}
.prose hr{border:0;height:1px;margin:1.3em 0;background:linear-gradient(90deg,#2e2e2e,transparent)}
.prose blockquote{
  margin:1.2em 0;
  padding:12px 16px;
  color:#d9d9d9;
  background:var(--panel);
  border-left:3px solid var(--neon);
  border-radius:0 var(--r) var(--r) 0;
}
.prose div:target h2{color:var(--neon)}

/* 侧栏 */
.side{
  position:sticky;
  top:88px;
  padding:16px 14px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r);
}
.side h2{margin:0 0 10px;font-size:16px;letter-spacing:.16em;color:#fff}
.side hr{border:0;height:1px;margin:0 0 12px;background:linear-gradient(90deg,#2e2e2e,transparent)}
.side ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.side a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:9px 4px;
  font-size:16px;
  color:#c9c9c9;
  border-bottom:1px dashed #1e1e1e;
}
.side a::before{content:"·";margin-right:9px;color:var(--neon)}
.side a:hover{color:var(--neon);text-decoration:none}
.side li:last-child a{border-bottom:0}

/* 页脚 */
.foot{
  border-top:1px solid var(--line);
  padding:clamp(28px,5vw,56px) 16px 22px;
  overflow:hidden;
}
.foot__top{
  max-width:1200px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1fr 1fr 1.45fr;
  gap:26px;
  align-items:start;
}
.foot__addr{
  font-style:normal;
  font-size:19px;
  letter-spacing:.1em;
  color:#fff;
}
.foot__links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.foot__links a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:10px 0;
  font-size:16px;
  color:#c9c9c9;
  border-bottom:1px dashed #1d1d1d;
}
.foot__links a::before{content:"▸";margin-right:8px;color:var(--neon)}
.foot__links a:hover{color:var(--neon);text-decoration:none}
.foot__word{
  margin:0;
  font-size:clamp(32px,7.6vw,84px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  text-align:right;
  word-break:break-all;
  color:transparent;
  -webkit-text-stroke:1px #3c3c3c;
}
.foot__end{
  max-width:1200px;
  margin:26px auto 0;
  padding-top:14px;
  border-top:1px solid #1c1c1c;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  font-size:16px;
  color:#8d8d8d;
}
.foot__copy{margin:0}
.foot__mini{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:16px}
.foot__mini a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 2px;
  color:#c9c9c9;
}
.foot__mini a:hover{color:var(--neon)}

/* 滚动显现 */
.rv{transition:opacity .5s ease,transform .5s ease}
.rv:not(.in){opacity:0;transform:translateY(14px)}

@media (max-width:980px){
  .wrap{grid-template-columns:minmax(0,1fr)}
  .side{position:static;order:2}
  .foot__top{grid-template-columns:1fr 1fr}
  .foot__word{grid-column:1 / -1;text-align:left;margin-top:6px}
}
@media (max-width:720px){
  body{font-size:17px}
  .bar{
    grid-template-columns:1fr 1fr;
    grid-template-areas:"brand brand" "l r";
    row-gap:9px;
    padding:10px 12px;
  }
  .bar__brand{grid-area:brand;justify-self:center;font-size:20px}
  .bar__side--l{grid-area:l;justify-self:start}
  .bar__side--r{grid-area:r;justify-self:end}
  .menu__btn{padding:10px 11px}
  .search input{width:86px;padding:8px 9px}
  .search button{padding:8px 10px}
  .hero{padding-top:20px}
  .hero__box{grid-template-columns:1fr;min-height:0}
  .hero__art{aspect-ratio:16/9}
  .prose > div{scroll-margin-top:136px}
  .hero__h1{font-size:clamp(28px,8.4vw,40px)}
  .foot__top{grid-template-columns:1fr;gap:18px}
  .foot__word{font-size:clamp(30px,12vw,56px)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none !important;animation:none !important}
}

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