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

:root{
  --neon:#00ff80;
  --blue:#0000ff;
  --ink:#000000;
  --soft:#e6fff0;
  --serif:'Cormorant','Songti SC',Georgia,serif;
  --sans:'Montserrat',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

html{
  scroll-behavior:smooth;
  background:#000;
}

body{
  margin:0;
  background-color:#000;
  background-image:
    repeating-linear-gradient(to right,rgba(0,255,128,.06) 0 1px,transparent 1px 34px),
    repeating-linear-gradient(to bottom,rgba(0,255,128,.06) 0 1px,transparent 1px 34px);
  color:#fff;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.72;
  font-weight:400;
}

img{max-width:100%;display:block;}
a{color:var(--neon);}
:focus-visible{outline:3px solid var(--neon);outline-offset:3px;}
[id]{scroll-margin-top:26px;}

/* 品牌行 */
.mast{
  border-bottom:4px solid var(--neon);
  background:rgba(0,0,0,.94);
}

.brandline{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:16px 20px;
  border-bottom:2px solid rgba(255,255,255,.18);
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:46px;
  padding:6px 0;
  text-decoration:none;
  color:#fff;
  font-family:var(--serif);
  font-size:clamp(26px,6vw,42px);
  font-weight:700;
  letter-spacing:.05em;
  line-height:1;
}

.brand:hover{color:var(--neon);}
.logomark{width:42px;height:42px;object-fit:contain;border:2px solid var(--neon);}

/* 菜单行 */
.rail{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:center;
  gap:0 14px;
  padding:14px 20px 16px;
}

.railtitle{
  margin:0;
  font-family:var(--sans);
  font-size:13px;
  font-weight:700;
  letter-spacing:.34em;
  color:var(--neon);
}

.rule{
  grid-column:1/-1;
  margin:10px 0 12px;
  height:2px;
  border:0;
  background:var(--neon);
}

.railnav{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  gap:8px 10px;
}

.railnav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.railnav ul.menu-b{
  padding-left:10px;
  border-left:3px solid var(--neon);
}

.railnav a{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:10px 14px;
  border:2px solid #fff;
  background:#000;
  color:#fff;
  font-size:16px;
  font-weight:600;
  text-decoration:none;
}

.railnav a:hover,
.railnav a:focus-visible{
  background:var(--neon);
  border-color:var(--neon);
  color:#000;
}

.railnav .num{
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--neon);
}

.railnav a:hover .num{color:var(--blue);}

/* 首屏 */
.hero{
  position:relative;
  isolation:isolate;
  display:flex;
  align-items:center;
  min-height:100vh;
  min-height:100svh;
  padding:88px 20px 64px;
  overflow:hidden;
  border-bottom:4px solid var(--blue);
}

.heroimg{
  position:absolute;
  inset:0;
  z-index:-2;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:grayscale(.22) contrast(1.06);
}

.hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(to top,rgba(0,0,0,.94) 6%,rgba(0,0,0,.48) 55%,rgba(0,0,0,.86));
}

.badge{
  position:absolute;
  top:22px;
  left:20px;
  z-index:2;
  padding:8px 13px;
  border:3px solid var(--neon);
  background:#000;
  color:var(--neon);
  font-size:13px;
  font-weight:700;
  letter-spacing:.24em;
}

.herotext{
  position:relative;
  z-index:2;
  width:100%;
  max-width:1100px;
  margin:0 auto;
}

.herotext h1{
  margin:0 0 18px;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(38px,8.4vw,86px);
  line-height:1.06;
  color:#fff;
  text-shadow:6px 6px 0 var(--blue);
}

.herotext .lead{
  margin:0;
  max-width:60ch;
  padding-left:14px;
  border-left:4px solid var(--neon);
  color:var(--soft);
  font-size:17px;
}

/* 正文 */
main{display:block;}

.wrap{
  max-width:1080px;
  margin:0 auto;
  padding:64px 20px 88px;
}

.prose{display:grid;gap:30px;}

.prose > div{
  padding:28px 24px;
  border:3px solid #fff;
  border-radius:4px;
  background:rgba(0,255,128,.055);
  -webkit-backdrop-filter:blur(7px);
  backdrop-filter:blur(7px);
  box-shadow:10px 10px 0 var(--blue);
}

.prose h2{
  margin:0 0 12px;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(27px,4.6vw,38px);
  line-height:1.15;
  color:var(--neon);
}

.prose h3{
  margin:22px 0 8px;
  font-size:19px;
  font-weight:700;
  color:#fff;
}

.prose h2 + hr,
.prose h3 + hr{margin:0 0 18px;}

.prose hr{
  margin:18px 0;
  height:3px;
  border:0;
  background:var(--neon);
}

.prose p{margin:0 0 14px;color:#f2fff7;}
.prose ul,.prose ol{margin:0 0 16px;padding-left:22px;}
.prose li{margin:0 0 8px;}
.prose li::marker{color:var(--neon);font-weight:700;}

.prose a{
  color:var(--neon);
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}

.prose a:hover{background:var(--neon);color:#000;text-decoration:none;}
.prose strong{color:var(--neon);}

.prose blockquote{
  margin:0 0 16px;
  padding:12px 16px;
  border-left:4px solid var(--blue);
  background:rgba(0,0,255,.18);
}

.prose figure{margin:0 0 16px;}
.prose table{width:100%;border-collapse:collapse;font-size:16px;}
.prose th,.prose td{border:2px solid rgba(255,255,255,.32);padding:10px;text-align:left;}
.prose th{background:rgba(0,255,128,.12);}

/* 页脚 */
footer{
  border-top:4px solid var(--neon);
  background:#000;
  padding:44px 20px 26px;
}

.footcols{
  max-width:1080px;
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
}

footer dl{margin:0;}

footer dt{
  padding-bottom:8px;
  border-bottom:2px solid rgba(255,255,255,.25);
  font-size:13px;
  font-weight:700;
  letter-spacing:.3em;
  color:#fff;
}

footer dd{margin:0;padding:0;}

footer dd a{
  display:block;
  min-height:44px;
  padding:11px 0;
  color:#e2efe8;
  font-size:16px;
  text-decoration:none;
}

footer dd a:hover{color:var(--neon);}
footer .plain{display:block;padding:11px 0;color:var(--soft);font-size:16px;}

.footbase{
  max-width:1080px;
  margin:34px auto 0;
  padding-top:16px;
  border-top:2px solid rgba(255,255,255,.22);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-size:15px;
  color:#c9d6cf;
}

.footbase a{
  display:inline-block;
  min-height:40px;
  padding:8px 0;
  color:var(--neon);
  text-decoration:none;
  border-bottom:2px solid var(--neon);
}

/* 滚动出场 */
.js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .5s ease,transform .5s ease;
}

.js .reveal.in{opacity:1;transform:none;}

/* 窄屏 */
@media (max-width:720px){
  .hero{padding:96px 16px 56px;}
  .herotext h1{text-shadow:4px 4px 0 var(--blue);}
  .badge{font-size:12px;padding:6px 10px;letter-spacing:.18em;}
  .wrap{padding:44px 16px 60px;}
  .prose > div{padding:22px 16px;box-shadow:7px 7px 0 var(--blue);}
  .footcols{grid-template-columns:1fr;gap:20px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;transition:none;}
  .heroimg{transform:none !important;}
  .footbase a,.railnav a{transition:none;}
}

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