@import url('https://fonts.googleapis.com/css2?family=Figtree:wght@300;400;500;600;700&family=Noto+Sans:wght@300;400;500;700&display=swap');

:root{
  --ink:#000000;
  --green:#00ff80;
  --blue:#0000ff;
  --pure:#ffffff;
  --line:3px solid var(--green);
  --pad:clamp(16px,4vw,40px);
  --max:1180px;
  --display:'Figtree','Noto Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --body:'Noto Sans','Figtree',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}

html{
  scroll-behavior:smooth;
  background:var(--ink);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  overflow-x:hidden;
  background:var(--ink);
  color:#e8fff3;
  font-family:var(--body);
  font-size:17px;
  line-height:1.7;
  font-weight:400;
}

a{color:var(--green);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--pure);outline-offset:3px;}

.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:-9999px;top:0;z-index:99;padding:12px 16px;background:var(--green);color:#000;font-weight:800;text-decoration:none;}
.skip:focus{left:8px;top:8px;}

/* 顶部细条 */
.ticker{
  display:flex;align-items:center;gap:12px;
  padding:9px var(--pad);
  background:var(--blue);
  color:var(--pure);
  font-weight:700;
  font-size:16px;
  line-height:1.4;
  border-bottom:2px solid var(--green);
  white-space:nowrap;
  overflow:hidden;
}
.ticker-brand{color:var(--green);letter-spacing:.06em;}
.ticker-dot{color:var(--green);}
.ticker-desc{overflow:hidden;text-overflow:ellipsis;flex:1 1 auto;}

/* 品牌居中、菜单分列两侧 */
.masthead{
  position:sticky;top:0;z-index:30;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
  padding:8px var(--pad);
  background:var(--ink);
  border-bottom:4px solid var(--green);
}

.nav ul{display:flex;flex-wrap:wrap;list-style:none;margin:0;padding:0;gap:2px;}
.nav-r ul{justify-content:flex-end;}
.nav a{
  display:block;
  padding:12px 9px;
  min-height:44px;
  color:var(--green);
  font-weight:700;
  font-size:16px;
  line-height:1.25;
  text-decoration:none;
  border:2px solid transparent;
}
.nav a:hover,.nav a:focus{background:var(--green);color:#000;border-color:var(--green);}

.brand{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  border:3px solid var(--green);
  color:var(--pure);
  text-decoration:none;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(20px,2.4vw,28px);
  letter-spacing:-.02em;
  line-height:1.1;
}
.brand:hover,.brand:focus{background:var(--blue);border-color:var(--blue);color:var(--pure);}
.brand-logo{width:32px;height:32px;object-fit:cover;display:block;border-radius:28px;border:2px solid var(--green);}

/* 首屏 */
.hero{
  position:relative;
  min-height:45vh;
  display:grid;
  place-items:center;
  padding:34px var(--pad) 48px;
  overflow:hidden;
  text-align:center;
  border-bottom:4px solid var(--green);
  background:
    linear-gradient(to right,rgba(0,255,128,.10) 1px,transparent 1px) 0 0/100% 100%,
    var(--ink);
}
.ghost{
  position:absolute;inset:0;
  display:grid;place-items:center;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(56px,19vw,180px);
  line-height:.82;
  letter-spacing:-.05em;
  color:transparent;
  -webkit-text-stroke:2px rgba(0,255,128,.34);
  pointer-events:none;
  user-select:none;
  z-index:0;
}
.hero-copy{position:relative;z-index:3;max-width:min(560px,78%);}
.hero-copy small{
  display:inline-block;
  margin-bottom:12px;
  padding:3px 9px;
  border:2px solid var(--green);
  color:var(--green);
  font-weight:800;
  font-size:16px;
  line-height:1.4;
  letter-spacing:.08em;
}
.hero h1{
  margin:0;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(30px,5.6vw,60px);
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--pure);
  text-wrap:balance;
}

.shot{
  position:absolute;
  margin:0;
  overflow:hidden;
  border:3px solid var(--green);
  border-radius:28px;
  background:#0b0b0b;
  z-index:1;
}
.shot-a{width:clamp(84px,15vw,180px);aspect-ratio:3/4;top:10%;left:2.5%;transform:rotate(-6deg);}
.shot-b{width:clamp(74px,13vw,160px);aspect-ratio:4/5;bottom:8%;right:2.5%;transform:rotate(5deg);border-color:var(--blue);}
.shot-img{width:100%;height:100%;object-fit:cover;display:block;}

/* 正文 + 右侧栏 */
.stage{
  max-width:var(--max);
  margin:0 auto;
  padding:40px var(--pad) 64px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 252px;
  gap:44px;
  align-items:start;
}

.prose{min-width:0;counter-reset:sec;}
.prose > section{
  position:relative;
  border-top:3px solid var(--green);
  padding:26px 0 34px;
  scroll-margin-top:120px;
  counter-increment:sec;
}
.prose > section:first-child{border-top:0;padding-top:0;}
.prose > section::before{
  content:counter(sec);
  display:inline-block;
  margin-bottom:12px;
  padding:1px 9px;
  background:var(--blue);
  color:var(--pure);
  font-family:var(--display);
  font-weight:700;
  font-size:16px;
  line-height:1.5;
}

.prose small{
  display:inline-block;
  margin-bottom:8px;
  padding:2px 9px;
  background:var(--green);
  color:#000;
  font-weight:800;
  font-size:16px;
  line-height:1.4;
}

.prose h2{
  margin:0 0 14px;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(23px,3.4vw,34px);
  line-height:1.24;
  letter-spacing:-.01em;
  color:var(--pure);
  text-wrap:balance;
}
.prose h3{
  margin:26px 0 10px;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(19px,2.4vw,23px);
  line-height:1.3;
  color:var(--green);
}
.prose p{margin:0 0 16px;line-height:1.78;}
.prose ul,.prose ol{margin:0 0 18px;padding-left:24px;line-height:1.75;}
.prose li{margin:0 0 8px;}
.prose a{color:var(--green);font-weight:700;text-decoration:underline;text-underline-offset:3px;}
.prose a:hover{background:var(--green);color:#000;text-decoration:none;}
.prose strong{color:var(--green);font-weight:700;}
.prose em{font-style:normal;background:rgba(0,255,128,.14);padding:0 3px;}
.prose blockquote{
  margin:20px 0;
  padding:14px 18px;
  border-left:8px solid var(--blue);
  background:#050518;
  color:#ddfff1;
}
.prose blockquote p:last-child{margin:0;}
.prose img{
  display:block;
  width:100%;
  height:auto;
  margin:18px 0;
  border:3px solid var(--green);
  border-radius:28px;
}
.prose figure{
  margin:20px 0;
  border:3px solid var(--green);
  border-radius:28px;
  overflow:hidden;
  background:#0b0b0b;
}
.prose figure img{margin:0;border:0;border-radius:0;}
.prose figcaption{
  padding:9px 14px;
  background:var(--green);
  color:#000;
  font-weight:700;
  font-size:16px;
  line-height:1.5;
}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:16px;}
.prose th,.prose td{border:2px solid rgba(0,255,128,.45);padding:9px 11px;text-align:left;vertical-align:top;}
.prose th{background:rgba(0,255,128,.14);color:var(--pure);}
.prose code{font-family:ui-monospace,Consolas,monospace;background:#0a1a12;border:1px solid rgba(0,255,128,.35);padding:1px 5px;font-size:16px;}
.prose hr{border:0;border-top:3px solid rgba(0,255,128,.4);margin:26px 0;}

/* 右侧目录 */
.rail{
  position:sticky;
  top:112px;
  padding:18px;
  border:3px solid var(--green);
  border-radius:28px;
  background:#050505;
}
.rail small{
  display:inline-block;
  margin-bottom:8px;
  padding:2px 8px;
  background:var(--green);
  color:#000;
  font-weight:800;
  font-size:16px;
  line-height:1.4;
}
.rail h2{
  margin:0 0 10px;
  font-family:var(--display);
  font-weight:700;
  font-size:22px;
  line-height:1.2;
  color:var(--pure);
}
.rail-list{list-style:none;margin:0;padding:0;counter-reset:rl;}
.rail-list li{border-top:2px solid rgba(0,255,128,.24);}
.rail-list li:first-child{border-top:0;}
.rail-list li{counter-increment:rl;}
.rail-list a{
  display:block;
  padding:11px 2px;
  min-height:44px;
  color:var(--green);
  font-weight:700;
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
}
.rail-list a::before{
  content:counter(rl,decimal-leading-zero) " ";
  color:rgba(255,255,255,.55);
  font-family:var(--display);
  font-weight:700;
}
.rail-list a:hover,.rail-list a:focus{background:var(--blue);color:var(--pure);}

.go-top{
  display:inline-block;
  margin-top:14px;
  padding:11px 15px;
  min-height:44px;
  background:var(--green);
  color:#000;
  font-weight:800;
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
  border:3px solid #000;
  border-radius:28px;
}
.go-top:hover,.go-top:focus{background:var(--blue);color:var(--pure);border-color:var(--pure);}

/* 页脚 */
.foot{
  border-top:4px solid var(--green);
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  background:var(--ink);
}
.foot-col{padding:26px var(--pad);border-right:2px solid rgba(0,255,128,.28);}
.foot-col:last-of-type{border-right:0;}
.foot small{
  display:inline-block;
  margin-bottom:8px;
  padding:2px 8px;
  background:var(--green);
  color:#000;
  font-weight:800;
  font-size:16px;
  line-height:1.4;
}
.foot h3{
  margin:0 0 12px;
  font-family:var(--display);
  font-weight:700;
  font-size:20px;
  line-height:1.25;
  color:var(--pure);
}
.foot ul{list-style:none;margin:0;padding:0;}
.foot ul a{
  display:block;
  padding:10px 0;
  min-height:44px;
  color:var(--green);
  font-weight:700;
  font-size:16px;
  text-decoration:none;
}
.foot ul a:hover,.foot ul a:focus{background:var(--green);color:#000;padding-left:6px;}
.foot-brand .brand-logo{width:42px;height:42px;}
.foot-name{
  margin:10px 0 0;
  font-family:var(--display);
  font-weight:700;
  font-size:23px;
  line-height:1.2;
  letter-spacing:-.02em;
  color:var(--pure);
}
.foot-back{margin:0;}

.sub-form{display:flex;flex-wrap:wrap;gap:8px;}
.sub-form input{
  flex:1 1 130px;
  min-height:44px;
  padding:11px 12px;
  background:#000;
  border:3px solid var(--green);
  border-radius:0;
  color:var(--pure);
  font-family:var(--body);
  font-size:16px;
}
.sub-form input::placeholder{color:rgba(255,255,255,.55);}
.sub-form button{
  flex:0 0 auto;
  min-height:44px;
  padding:11px 18px;
  background:var(--blue);
  border:3px solid var(--green);
  border-radius:0;
  color:var(--pure);
  font-family:var(--body);
  font-weight:800;
  font-size:16px;
  cursor:pointer;
}
.sub-form button:hover,.sub-form button:focus{background:var(--green);color:#000;}

.endbar{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:12px var(--pad);
  background:var(--green);
  color:#000;
  font-weight:800;
  border-top:2px solid var(--green);
}
.endbar a{color:#000;text-decoration:none;padding:9px 10px;min-height:40px;display:inline-block;}
.endbar a:hover,.endbar a:focus{background:#000;color:var(--green);}
.endbar-links{display:flex;gap:4px;flex-wrap:wrap;}

/* 动效 */
.reveal{transition:opacity 100ms linear,transform 100ms linear;}
html.js .reveal{opacity:0;transform:translateY(10px);}
html.js .reveal.in{opacity:1;transform:none;}
.rail-list li:nth-child(1){transition-delay:0ms;}
.rail-list li:nth-child(2){transition-delay:45ms;}
.rail-list li:nth-child(3){transition-delay:90ms;}
.rail-list li:nth-child(4){transition-delay:135ms;}
.rail-list li:nth-child(5){transition-delay:180ms;}
.rail-list li:nth-child(6){transition-delay:225ms;}
.rail-list li:nth-child(7){transition-delay:270ms;}

@media (max-width:900px){
  .stage{grid-template-columns:minmax(0,1fr);gap:34px;}
  .rail{position:static;top:auto;}
  .foot{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-col:nth-child(2n){border-right:0;}
  .foot-col:nth-child(n+3){border-top:2px solid rgba(0,255,128,.28);}
}

@media (max-width:760px){
  .masthead{position:static;grid-template-columns:1fr;padding:10px var(--pad);gap:6px;}
  .brand{order:-1;justify-self:center;}
  .nav ul{justify-content:center;}
  .nav-r ul{justify-content:center;}
  .nav a{padding:11px 8px;}
  .hero{min-height:44vh;padding:26px var(--pad) 40px;}
  .hero-copy{max-width:84%;}
  .shot-a{width:70px;top:8%;left:2%;}
  .shot-b{width:62px;bottom:7%;right:2%;}
  .prose > section{scroll-margin-top:20px;}
}

@media (max-width:560px){
  .foot{grid-template-columns:minmax(0,1fr);}
  .foot-col{border-right:0;}
  .foot-col + .foot-col{border-top:2px solid rgba(0,255,128,.28);}
  .ticker{font-size:16px;}
  .prose{font-size:17px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal,html.js .reveal{transition:none;opacity:1;transform:none;}
  .rail-list li{transition-delay:0ms;}
}

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