@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

:root{
  --void:#0a0a16;
  --deep:#1a1a2e;
  --neon:#ff0000;
  --pink:#ff006e;
  --cyan:#66f2ff;
  --text:#e9e5f7;
  --dim:#a9a1c9;
  --line:rgba(255,0,110,.34);
  --line2:rgba(102,242,255,.24);
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --pad:clamp(1rem,4vw,2.5rem);
  --bar:64px;
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--bar) + 24px);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  min-height:100%;
  background:
    radial-gradient(1200px 620px at 82% -8%, rgba(255,0,110,.20), transparent 62%),
    radial-gradient(900px 520px at 4% 12%, rgba(255,0,0,.14), transparent 60%),
    linear-gradient(180deg,#12121f 0%, var(--deep) 38%, var(--void) 100%);
  background-attachment:fixed;
  color:var(--text);
  font-family:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,0,110,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(102,242,255,.06) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.35) 60%,transparent);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.35) 60%,transparent);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9990;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,.30) 0 1px,transparent 1px 3px);
  opacity:.55;
}

header,main,footer{position:relative;z-index:1}

a{color:var(--cyan)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* topbar */
.topbar{
  position:fixed;
  inset:0 0 auto 0;
  height:var(--bar);
  z-index:60;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.75rem;
  padding:0 var(--pad);
  background:linear-gradient(180deg,rgba(10,10,22,.94),rgba(10,10,22,.55));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:background .3s ease,border-color .3s ease;
}
.topbar.is-scrolled{background:rgba(8,8,18,.98);border-bottom-color:var(--pink)}

.mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:4px;
  color:var(--neon);
  text-decoration:none;
  overflow:hidden;
  background:rgba(255,0,110,.06);
}
.mark-img{display:block;width:100%;height:100%;object-fit:cover}
.mark-glyph{font-weight:800;font-size:20px;line-height:1;text-shadow:0 0 14px var(--neon)}

.top-tools{display:flex;align-items:center;gap:.55rem}

.contact{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 .9rem;
  border:1px solid var(--line2);
  border-radius:4px;
  color:var(--cyan);
  font-size:.92rem;
  text-decoration:none;
  letter-spacing:.06em;
}
.contact:hover,.contact:focus-visible{border-color:var(--cyan);box-shadow:0 0 16px rgba(102,242,255,.35)}

.burger{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  min-height:44px;
  padding:0 .9rem;
  background:rgba(255,0,110,.08);
  border:1px solid var(--line);
  border-radius:4px;
  color:var(--text);
  font:inherit;
  font-size:.92rem;
  letter-spacing:.08em;
  cursor:pointer;
}
.burger:hover{border-color:var(--pink)}
.burger-bars{position:relative;display:block;width:18px;height:2px;background:var(--pink);box-shadow:0 0 10px var(--pink);transition:background .2s}
.burger-bars::before,.burger-bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--pink);transition:transform .25s ease,top .25s ease}
.burger-bars::before{top:-6px}
.burger-bars::after{top:6px}
body.menu-open .burger-bars{background:transparent;box-shadow:none}
body.menu-open .burger-bars::before{top:0;transform:rotate(45deg)}
body.menu-open .burger-bars::after{top:0;transform:rotate(-45deg)}

/* overlay menu */
.menu-layer{
  position:fixed;
  inset:0;
  z-index:40;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:calc(var(--bar) + 32px) var(--pad) 40px;
  background:radial-gradient(700px 480px at 50% 0%,rgba(255,0,110,.22),transparent 65%),rgba(8,8,18,.97);
  backdrop-filter:blur(12px);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;
  overflow-y:auto;
}
body.menu-open .menu-layer{opacity:1;visibility:visible}

.menu-nav{width:100%;max-width:560px}
.menu-nav ul{list-style:none;margin:0;padding:0;display:grid;gap:.15rem}

.menu-nav a{
  display:flex;
  align-items:center;
  gap:1rem;
  min-height:52px;
  padding:.6rem 1rem;
  border:1px solid transparent;
  border-radius:4px;
  color:var(--text);
  font-size:clamp(1.05rem,3.4vw,1.45rem);
  font-weight:700;
  text-decoration:none;
  opacity:0;
  transform:translateY(12px);
  transition:opacity .35s ease,transform .35s ease,border-color .2s,color .2s,text-shadow .2s;
}
body.menu-open .menu-nav a{
  opacity:1;
  transform:none;
  transition-delay:calc(var(--i) * 45ms),calc(var(--i) * 45ms),0ms,0ms,0ms;
}
.menu-nav a:hover,.menu-nav a:focus-visible{
  border-color:var(--pink);
  color:#fff;
  text-shadow:0 0 16px var(--pink);
}

.idx{font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;color:var(--pink);flex:0 0 auto}

/* layout shell */
main{padding-top:var(--bar)}

.shell{
  max-width:1180px;
  margin:0 auto;
  padding:0 var(--pad) 3.5rem;
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  column-gap:clamp(1.25rem,3vw,2.5rem);
}

/* hero */
.hero{
  grid-column:1 / -1;
  min-height:calc(100vh - var(--bar));
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.85fr);
  align-items:center;
  gap:clamp(1.25rem,4vw,3rem);
  padding:clamp(2rem,6vw,4rem) 0 clamp(2rem,5vw,3.5rem);
  border-bottom:1px solid var(--line);
}
.hero-solo{grid-template-columns:minmax(0,1fr);min-height:min(78vh,620px)}

.hero-h1{
  margin:0;
  font-size:clamp(2rem,6.2vw,4.6rem);
  line-height:1.1;
  letter-spacing:-.02em;
  color:#fff;
  overflow-wrap:anywhere;
  text-shadow:
    2px 0 var(--pink),
    -2px 0 var(--cyan),
    0 0 36px rgba(255,0,110,.55);
  animation:glitchShift 7s steps(1) infinite;
}
@keyframes glitchShift{
  0%,90%,100%{transform:none}
  91%{transform:translate(-2px,1px) skewX(-2deg)}
  93%{transform:translate(3px,-1px)}
  95%{transform:translate(-1px,-2px) skewX(1.5deg)}
  97%{transform:none}
}

.hero-figure{
  margin:0;
  position:relative;
  border:1px solid var(--line);
  border-radius:4px;
  overflow:hidden;
  background:rgba(10,10,22,.6);
}
.hero-figure::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,.22) 0 1px,transparent 1px 4px);
}
.hero-img{display:block;width:100%;height:auto}

/* rail */
.rail{
  grid-column:1;
  grid-row:2;
  align-self:start;
  position:sticky;
  top:calc(var(--bar) + 20px);
  padding:clamp(1.5rem,3vw,2.2rem) 1rem 2rem 0;
  border-right:1px solid var(--line);
}

.rail-title{
  margin:0 0 .15rem;
  font-size:1.05rem;
  letter-spacing:.08em;
  color:#fff;
  text-shadow:0 0 16px rgba(255,0,110,.6);
}
.subtitle{
  margin:0 0 1rem;
  padding-bottom:.9rem;
  border-bottom:1px dashed var(--line2);
  font-size:.84rem;
  line-height:1.6;
  color:var(--dim);
}

.rail-list{list-style:none;margin:0;padding:0}
.rail-list a{
  display:flex;
  align-items:center;
  gap:.6rem;
  min-height:40px;
  padding:.42rem 0;
  border-bottom:1px solid rgba(255,255,255,.055);
  color:var(--dim);
  font-size:.9rem;
  text-decoration:none;
  transition:color .2s,padding-left .2s;
}
.rail-list a:hover,.rail-list a:focus-visible{color:var(--pink);padding-left:.3rem}

/* content doc */
.doc{
  grid-column:2;
  grid-row:2;
  min-width:0;
  padding:clamp(1.5rem,3vw,2.2rem) 0 2rem;
}

.doc article[id]{scroll-margin-top:calc(var(--bar) + 28px)}

.doc > article{
  position:relative;
  margin:0 0 1.35rem;
  padding:clamp(1.1rem,3vw,2rem);
  border:1px solid var(--line);
  border-radius:4px;
  background:linear-gradient(180deg,rgba(26,26,46,.85),rgba(10,10,22,.9));
  overflow:hidden;
}
.doc > article::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:64px;
  height:3px;
  background:linear-gradient(90deg,var(--neon),var(--pink),transparent);
}
.doc > article:last-child{margin-bottom:0}

.doc h2{
  margin:0 0 .85rem;
  padding-left:.75rem;
  border-left:4px solid var(--neon);
  font-size:clamp(1.22rem,3.2vw,1.7rem);
  line-height:1.3;
  color:#fff;
  text-shadow:0 0 20px rgba(255,0,110,.45);
}
.doc h3{
  margin:1.6rem 0 .45rem;
  font-size:1.06rem;
  color:var(--cyan);
  letter-spacing:.01em;
}
.doc p{margin:0 0 1rem;color:#cdc7e6}
.doc p:last-child{margin-bottom:0}
.doc ul,.doc ol{margin:0 0 1rem;padding-left:1.35rem}
.doc li{margin:.35rem 0;color:#cdc7e6}
.doc li::marker{color:var(--pink)}
.doc strong{color:#fff}
.doc em{color:#f2ecff}
.doc a{color:var(--cyan);text-underline-offset:3px;text-decoration-color:rgba(102,242,255,.5)}
.doc blockquote{
  margin:0 0 1rem;
  padding:.75rem 1rem;
  border-left:3px solid var(--pink);
  background:rgba(255,0,110,.08);
  color:#e6e1f6;
}
.doc time{font-family:var(--mono);font-size:.8rem;color:var(--pink);letter-spacing:.04em}
.doc img{display:block;max-width:100%;height:auto;margin:0 0 1rem;border:1px solid var(--line);border-radius:4px}
.doc table{width:100%;border-collapse:collapse;margin:0 0 1rem;font-size:.92rem}
.doc th,.doc td{border:1px solid var(--line2);padding:.5rem .6rem;text-align:left}
.doc th{color:#fff;background:rgba(102,242,255,.08)}
.doc code{font-family:var(--mono);font-size:.9em;color:var(--cyan)}

/* footer */
.foot{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,10,22,.35),rgba(6,6,14,.96));
  padding:clamp(2rem,5vw,3rem) var(--pad) 1.5rem;
}

.foot-grid{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1.1fr 1fr 1fr 1.3fr;
  gap:clamp(1.25rem,4vw,2.5rem);
}

.foot-col{min-width:0}
.foot-mark{display:inline-flex;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:4px;overflow:hidden;background:rgba(255,0,110,.06)}
.foot-addr{
  display:block;
  margin-top:.7rem;
  font-style:normal;
  font-weight:800;
  font-size:1.05rem;
  color:#fff;
  text-shadow:0 0 18px rgba(255,0,110,.5);
}

.foot-nav dl{margin:0}
.foot-nav dt{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.2em;
  color:var(--pink);
  margin-bottom:.35rem;
}
.foot-nav dd{margin:0}
.foot-nav a,.foot-quick a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--dim);
  font-size:.9rem;
  text-decoration:none;
}
.foot-nav a:hover,.foot-nav a:focus-visible,
.foot-quick a:hover,.foot-quick a:focus-visible{color:var(--cyan);text-decoration:underline}

.foot-quick{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}

.sub-form{display:flex;gap:.5rem;margin-top:.4rem;flex-wrap:wrap}
.sub-input{
  flex:1 1 8rem;
  min-width:0;
  min-height:44px;
  padding:0 .8rem;
  border:1px solid var(--line);
  border-radius:4px;
  background:rgba(10,10,22,.85);
  color:var(--text);
  font:inherit;
  font-size:.92rem;
}
.sub-input::placeholder{color:#7e779c}
.sub-input:focus-visible{border-color:var(--cyan);outline-offset:0}
.sub-btn{
  min-height:44px;
  padding:0 1.1rem;
  border:1px solid var(--pink);
  border-radius:4px;
  background:rgba(255,0,110,.16);
  color:#fff;
  font:inherit;
  font-size:.92rem;
  letter-spacing:.08em;
  cursor:pointer;
}
.sub-btn:hover{box-shadow:0 0 18px rgba(255,0,110,.5)}

.foot-bar{
  max-width:1180px;
  margin:clamp(1.6rem,4vw,2.4rem) auto 0;
  padding-top:1rem;
  border-top:1px dashed var(--line2);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.35rem;
  text-align:center;
}
.copy{margin:0;font-family:var(--mono);font-size:.8rem;letter-spacing:.08em;color:var(--dim)}
.to-top{display:inline-flex;align-items:center;min-height:40px;font-size:.82rem;color:var(--cyan);text-decoration:none}
.to-top:hover{text-decoration:underline}

/* reveal */
.will-reveal{opacity:.001;transform:translateY(16px)}
.will-reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .55s ease,transform .55s ease;
}

@media (max-width:900px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;padding-top:1.75rem}
  .hero-h1{font-size:clamp(1.9rem,8vw,3rem)}
  .rail{
    grid-column:1;
    grid-row:auto;
    position:static;
    padding:1.25rem 0;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .rail-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:1rem}
  .doc{grid-column:1;grid-row:auto;padding-top:1.25rem}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:560px){
  .rail-list{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .burger-txt{display:inline}
  .contact{padding:0 .7rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .will-reveal{opacity:1;transform:none}
}

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