:root{
  --red:#ff0000;
  --pink:#ff1493;
  --ink:#261717;
  --line:rgba(255,255,255,.14);
  --soft:rgba(255,240,244,.86);
  --r:28px;
  --rail:84px;
}
*,*::before,*::after{box-sizing:border-box}
html{
  background:#150c0e;
  color-scheme:dark;
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  min-height:100vh;
  overflow-x:hidden;
  color:var(--soft);
  font-family:"Noto Sans JP",system-ui,-apple-system,"Segoe UI","Hiragino Sans","Microsoft YaHei",sans-serif;
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.lock{overflow:hidden}

body::before{
  content:"";
  position:fixed;
  inset:-25%;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(38% 42% at 16% 10%, rgba(255,0,0,.62), transparent 70%),
    radial-gradient(44% 46% at 84% 20%, rgba(255,20,147,.52), transparent 72%),
    radial-gradient(52% 50% at 50% 92%, rgba(255,86,150,.34), transparent 74%),
    conic-gradient(from 210deg at 62% 38%, rgba(255,0,0,.34), rgba(255,20,147,.3), rgba(96,34,74,.42), rgba(255,0,0,.34));
  background-size:200% 200%;
  filter:saturate(1.2) blur(14px);
  animation:aurora 11s ease-in-out infinite alternate;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.62;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 26%, #000 18%, transparent 78%);
  mask-image:radial-gradient(circle at 50% 26%, #000 18%, transparent 78%);
}
@keyframes aurora{
  from{background-position:0% 0%,100% 0%,50% 100%,0% 50%}
  to{background-position:62% 40%,38% 62%,18% 30%,100% 50%}
}

a{color:inherit}
img{max-width:100%}
h1,h2,h3,h4{
  font-family:"Noto Serif JP","Hiragino Mincho ProN",serif;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.02em;
  color:#fff;
}
menu{margin:0;padding:0;list-style:none}

.skip{
  position:fixed;
  top:10px;
  left:10px;
  z-index:80;
  padding:10px 16px;
  border-radius:12px;
  background:var(--pink);
  color:#fff;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .25s ease;
}
.skip:focus{transform:none}

/* 左侧竖排导航 */
.rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:50;
  width:var(--rail);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  padding:26px 0 26px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg, rgba(38,23,23,.76), rgba(21,12,14,.42));
  -webkit-backdrop-filter:blur(16px) saturate(1.2);
  backdrop-filter:blur(16px) saturate(1.2);
}
.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:#fff;
}
.brand-mark{
  width:10px;
  height:10px;
  border-radius:50%;
  background:radial-gradient(circle at 30% 30%, #fff, var(--pink) 55%, var(--red));
  box-shadow:0 0 16px rgba(255,20,147,.85);
}
.brand-t{
  writing-mode:vertical-rl;
  font-family:"Noto Serif JP",serif;
  font-size:.95rem;
  font-weight:600;
  letter-spacing:.34em;
  text-shadow:0 0 22px rgba(255,0,80,.45);
}
.contact{
  margin-top:auto;
  writing-mode:vertical-rl;
  padding:14px 5px;
  min-height:44px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:.8rem;
  letter-spacing:.22em;
  text-decoration:none;
  color:#ffd6e6;
  transition:border-color .25s, color .25s, background .25s;
}
.contact:hover,.contact:focus-visible{
  color:#fff;
  border-color:rgba(255,20,147,.7);
  background:rgba(255,20,147,.18);
}
.shell{margin:0}
.shell > summary{
  list-style:none;
  width:52px;
  height:52px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid var(--line);
  border-radius:16px;
  background:rgba(255,255,255,.07);
  color:#fff;
  cursor:pointer;
  transition:background .25s, border-color .25s;
}
.shell > summary::-webkit-details-marker{display:none}
.shell > summary::marker{content:""}
.shell > summary:hover,.shell > summary:focus-visible{
  background:rgba(255,20,147,.24);
  border-color:rgba(255,20,147,.7);
}
.bars{
  display:block;
  width:20px;
  height:2px;
  background:currentColor;
  box-shadow:0 6px 0 currentColor, 0 -6px 0 currentColor;
  transition:transform .3s, box-shadow .3s;
}
.shell[open] .bars{
  transform:rotate(45deg);
  box-shadow:0 0 0 transparent, 0 0 0 transparent;
}
.lbl{font-size:.68rem;letter-spacing:.14em}

.drawer{
  position:fixed;
  inset:0;
  z-index:60;
  display:grid;
  align-content:center;
  gap:2px;
  padding:clamp(84px,14vh,150px) clamp(28px,10vw,150px);
  background:
    radial-gradient(90% 70% at 14% 4%, rgba(255,0,0,.46), transparent 62%),
    radial-gradient(74% 60% at 92% 90%, rgba(255,20,147,.42), transparent 60%),
    rgba(18,10,11,.94);
  -webkit-backdrop-filter:blur(20px) saturate(1.3);
  backdrop-filter:blur(20px) saturate(1.3);
  animation:drawerIn .4s cubic-bezier(.2,.8,.3,1) both;
}
@keyframes drawerIn{
  from{opacity:0;transform:translateY(-16px)}
  to{opacity:1;transform:none}
}
.drawer li a{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:54px;
  padding:6px 0;
  text-decoration:none;
  color:#fff;
  font-family:"Noto Serif JP",serif;
  font-size:clamp(1.1rem,3.4vw,1.85rem);
  border-bottom:1px solid rgba(255,255,255,.1);
  transition:color .25s, padding-left .25s;
}
.drawer li a:hover,.drawer li a:focus-visible{
  color:#ffd0e4;
  padding-left:12px;
}
.n{
  font-family:"Noto Sans JP",sans-serif;
  font-size:.72rem;
  letter-spacing:.16em;
  color:rgba(255,255,255,.45);
}

main{padding-left:var(--rail)}
.wrap{
  max-width:1220px;
  margin:0 auto;
  padding:0 clamp(16px,5vw,64px);
}

.hero{
  min-height:100vh;
  min-height:100svh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:clamp(26px,5vh,54px);
  padding:clamp(96px,13vh,150px) 0 clamp(44px,8vh,84px);
  text-align:center;
  scroll-margin-top:88px;
}
.hero h1{
  margin:0;
  max-width:24ch;
  font-size:clamp(2rem,7vw,4.5rem);
  line-height:1.24;
  text-wrap:balance;
  background:linear-gradient(112deg,#ffffff,#ffd7e4 38%,#ff64a6 68%,var(--red));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 10px 34px rgba(255,0,80,.4));
}
.hero-fig{
  margin:0;
  width:min(100%,720px);
  overflow:hidden;
  border-radius:var(--r);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(255,255,255,.1), rgba(255,255,255,.03));
  box-shadow:0 30px 80px -34px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.18);
}
.hero-fig img{
  display:block;
  width:100%;
  height:auto;
  transition:transform .8s cubic-bezier(.2,.7,.3,1);
}
.hero-fig:hover img{transform:scale(1.03)}

.panel{
  display:grid;
  grid-template-columns:minmax(0,1fr) 296px;
  gap:clamp(20px,3vw,38px);
  align-items:start;
  padding-bottom:clamp(56px,9vh,110px);
}
.prose,
.railside{
  border:1px solid var(--line);
  border-radius:var(--r);
  -webkit-backdrop-filter:blur(18px) saturate(1.15);
  backdrop-filter:blur(18px) saturate(1.15);
  box-shadow:0 28px 74px -34px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.16);
}
.prose{
  padding:clamp(24px,4vw,50px);
  background:linear-gradient(158deg, rgba(58,32,36,.82), rgba(26,15,17,.93));
}
.railside{
  position:sticky;
  top:96px;
  padding:24px 22px 26px;
  background:linear-gradient(158deg, rgba(52,28,32,.78), rgba(24,14,16,.9));
}

.prose article{scroll-margin-top:92px}
.prose article + article{
  margin-top:2.4em;
  padding-top:2.4em;
  border-top:1px solid rgba(255,255,255,.12);
}
.prose h2{
  margin:0 0 .5em;
  font-size:clamp(1.35rem,3vw,1.95rem);
  position:relative;
  padding-bottom:.4em;
}
.prose h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:56px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--red),var(--pink));
}
.prose h3{
  margin:1.6em 0 .4em;
  font-size:clamp(1.1rem,2.2vw,1.35rem);
}
.prose h2 + p,
.prose h2 + .subtitle{margin-top:.2em}
.prose p{margin:.9em 0}
.prose p.subtitle,
.prose .lead{
  color:#ffd3e4;
  font-size:1rem;
  letter-spacing:.02em;
}
.prose a{
  color:#ffb7d2;
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  transition:color .2s;
}
.prose a:hover{color:#fff}
.prose ul,.prose ol{padding-left:1.3em;margin:.9em 0}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--pink)}
.prose img{border-radius:18px;height:auto;margin:.8em 0}
.prose figure{margin:1.2em 0}
.prose blockquote{
  margin:1.4em 0;
  padding:.6em 1.1em;
  border-left:3px solid var(--pink);
  border-radius:0 18px 18px 0;
  background:rgba(255,20,147,.1);
  color:#ffdbe8;
}
.prose blockquote p{margin:.4em 0}
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:1.2em 0;
  font-size:.95rem;
}
.prose th,.prose td{
  border-bottom:1px solid rgba(255,255,255,.16);
  padding:.6em .5em;
  text-align:left;
}
.prose th{color:#fff;font-weight:600}
.prose hr{
  border:0;
  border-top:1px solid rgba(255,255,255,.16);
  margin:2em 0;
}
.prose time{
  font-size:.85rem;
  letter-spacing:.08em;
  color:rgba(255,255,255,.6);
}

.railside h2{
  margin:0;
  font-size:1.1rem;
  letter-spacing:.06em;
}
.railside .subtitle{
  margin:.35em 0 1em;
  font-size:.9rem;
  line-height:1.7;
  color:rgba(255,236,242,.7);
}
.jump{display:grid}
.jump li a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:4px 0;
  font-size:.92rem;
  text-decoration:none;
  color:rgba(255,240,244,.82);
  border-bottom:1px dashed rgba(255,255,255,.13);
  transition:color .2s, padding-left .2s;
}
.jump li a:hover,.jump li a:focus-visible{color:#fff;padding-left:8px}
.jump li:last-child a{border-bottom:0}

footer{
  margin-left:var(--rail);
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  padding:clamp(40px,7vh,74px) clamp(20px,6vw,72px) 34px;
  border-top:1px solid rgba(255,255,255,.1);
}
.foot-mark a{
  display:inline-block;
  font-family:"Noto Serif JP",serif;
  font-weight:600;
  line-height:1.05;
  letter-spacing:.02em;
  text-decoration:none;
  font-size:clamp(1.9rem,7vw,4.2rem);
  background:linear-gradient(100deg,#ffffff,#ffa2c8 46%,var(--red));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 6px 24px rgba(255,0,80,.3));
}
.foot-meta{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:6px;
  text-align:right;
}
.copy{margin:0;font-size:.85rem;color:rgba(255,255,255,.52)}
.foot-links{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:0 14px;
}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:.85rem;
  text-decoration:none;
  color:rgba(255,255,255,.7);
  transition:color .2s;
}
.foot-links a:hover,.foot-links a:focus-visible{color:#fff}
.foot-links .n{display:none}
.totop{margin:0}
.totop a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:.82rem;
  letter-spacing:.1em;
  text-decoration:none;
  color:#ffc6dc;
}
.totop a:hover{color:#fff}

.js .reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .8s ease, transform .8s cubic-bezier(.2,.7,.3,1);
}
.js .reveal.on{opacity:1;transform:none}

@media (max-width:900px){
  :root{--rail:0px}
  .rail{
    left:0;
    right:0;
    bottom:auto;
    width:auto;
    height:64px;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:0 14px;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .brand{flex-direction:row;gap:9px;min-height:44px}
  .brand-t{writing-mode:horizontal-tb;font-size:.95rem;letter-spacing:.14em}
  .contact{
    margin-top:0;
    margin-left:auto;
    writing-mode:horizontal-tb;
    display:inline-flex;
    align-items:center;
    min-height:40px;
    padding:0 14px;
    font-size:.82rem;
    letter-spacing:.1em;
  }
  .shell > summary{width:44px;height:44px}
  .drawer{padding-top:88px}
  main{padding-left:0;padding-top:64px}
  .hero{
    min-height:calc(100svh - 64px);
    padding-top:clamp(30px,7vh,64px);
    scroll-margin-top:76px;
  }
  .panel{grid-template-columns:minmax(0,1fr)}
  .railside{position:static}
  .prose article{scroll-margin-top:80px}
  footer{margin-left:0;flex-direction:column;align-items:flex-start}
  .foot-meta{align-items:flex-start;text-align:left}
  .foot-links{justify-content:flex-start}
  .foot-links .n{display:none}
}

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

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