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

:root{
  --ink:#261717;
  --red:#ff0000;
  --pink:#ff1493;
  --bg:#150d0d;
  --txt:#f6eeee;
  --dim:#c9b8b8;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.12);
  --radius:4px;
}

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

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

body{
  margin:0;
  background:transparent;
  color:var(--txt);
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.7;
  letter-spacing:.01em;
  overflow-x:hidden;
  padding-bottom:112px;
  -webkit-font-smoothing:antialiased;
}

body::before,
body::after{content:"";position:fixed;pointer-events:none}

body::before{
  inset:-25%;
  z-index:-2;
  background:
    radial-gradient(36% 40% at 20% 24%, rgba(255,0,0,.62), rgba(255,0,0,0) 62%),
    radial-gradient(32% 36% at 80% 16%, rgba(255,20,147,.55), rgba(255,20,147,0) 60%),
    radial-gradient(44% 46% at 66% 80%, rgba(255,20,147,.40), rgba(255,20,147,0) 64%),
    radial-gradient(40% 44% at 22% 84%, rgba(255,0,0,.32), rgba(255,0,0,0) 66%);
  filter:saturate(1.3) blur(26px);
  animation:aurora 11s ease-in-out infinite alternate;
}

body::after{
  inset:0;
  z-index:-1;
  opacity:.86;
  background:
    radial-gradient(130% 90% at 50% 0%, rgba(38,23,23,0) 38%, rgba(21,13,13,.85) 100%),
    conic-gradient(from 210deg at 50% 55%, rgba(38,23,23,.55), rgba(64,18,31,.5), rgba(38,23,23,.6), rgba(84,10,40,.42), rgba(38,23,23,.55));
  mix-blend-mode:multiply;
  animation:aurora2 9s ease-in-out infinite alternate;
}

@keyframes aurora{
  0%{transform:translate3d(-2%,-1%,0) scale(1.04) rotate(-1deg)}
  50%{transform:translate3d(2%,2%,0) scale(1.12) rotate(1.4deg)}
  100%{transform:translate3d(-1%,2%,0) scale(1.06) rotate(-.6deg)}
}
@keyframes aurora2{
  0%{transform:scale(1) rotate(0deg)}
  100%{transform:scale(1.08) rotate(2deg)}
}

a{color:inherit}
img{max-width:100%;height:auto}

.wrap{
  width:100%;
  max-width:1140px;
  margin:0 auto;
  padding:0 22px;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  min-height:45vh;
  display:flex;
  align-items:center;
  padding:64px 0 44px;
  border-bottom:1px solid var(--line);
}
.hero-in{
  position:relative;
  z-index:2;
  width:100%;
  max-width:1140px;
  margin:0 auto;
  padding:0 22px;
  text-align:left;
}
.chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0 0 20px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  border-radius:var(--radius);
  background:rgba(255,255,255,.07);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
  font-size:13px;
  letter-spacing:.06em;
  color:#ffe3ec;
}
.chip i{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--pink);
  animation:ping 2.4s ease-out infinite;
}
@keyframes ping{
  0%{box-shadow:0 0 0 0 rgba(255,20,147,.8)}
  70%{box-shadow:0 0 0 9px rgba(255,20,147,0)}
  100%{box-shadow:0 0 0 0 rgba(255,20,147,0)}
}
h1{
  margin:0;
  font-size:clamp(2.5rem,8.4vw,5.2rem);
  line-height:1.02;
  letter-spacing:-.035em;
  font-weight:700;
  background:linear-gradient(96deg,#ffffff 10%,#ffd7e6 42%,var(--pink) 74%,var(--red) 98%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.glow{
  position:absolute;
  z-index:1;
  border-radius:50%;
  filter:blur(46px);
  pointer-events:none;
}
.g1{
  width:290px;height:290px;right:-70px;top:-80px;
  background:radial-gradient(circle,rgba(255,0,0,.75),transparent 68%);
  animation:fl1 10s ease-in-out infinite alternate;
}
.g2{
  width:240px;height:240px;right:18%;bottom:-100px;
  background:radial-gradient(circle,rgba(255,20,147,.7),transparent 70%);
  animation:fl2 12s ease-in-out infinite alternate;
}
@keyframes fl1{0%{transform:translate(0,0)}100%{transform:translate(-18px,26px)}}
@keyframes fl2{0%{transform:translate(0,0)}100%{transform:translate(22px,-18px)}}

/* ---------- main grid ---------- */
.main-grid{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:34px;
  padding-top:44px;
  padding-bottom:34px;
}

/* ---------- rail (aside, left) ---------- */
.rail{
  position:sticky;
  top:22px;
  align-self:start;
  padding:18px 16px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  box-shadow:0 18px 40px rgba(0,0,0,.24);
}
.rail h2{
  margin:0;
  font-size:13px;
  font-weight:600;
  letter-spacing:.22em;
  color:#ffd9e6;
}
.rail hr{
  width:34px;
  height:2px;
  border:0;
  margin:10px 0 14px;
  background:linear-gradient(90deg,var(--red),var(--pink));
  border-radius:2px;
}
.rail ol{
  list-style:none;
  margin:0;
  padding:0;
  counter-reset:toc;
}
.rail li{counter-increment:toc}
.rail a{
  display:block;
  min-height:42px;
  padding:10px 6px;
  border-radius:var(--radius);
  color:var(--dim);
  text-decoration:none;
  font-size:15px;
  line-height:1.45;
  transition:color .2s ease,background .2s ease;
}
.rail a::before{
  content:counter(toc,decimal-leading-zero);
  margin-right:8px;
  font-size:11px;
  letter-spacing:.08em;
  color:rgba(255,255,255,.38);
}
.rail a:hover{color:#fff;background:rgba(255,255,255,.07)}
.to-top{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  margin-top:10px;
  padding:8px 6px;
  font-size:14px;
  color:#ffb8cf;
  text-decoration:none;
}
.to-top:hover{color:#fff}

/* ---------- div ---------- */
.body{min-width:0}
.body article{
  position:relative;
  overflow:hidden;
  margin:0 0 20px;
  padding:26px 26px 30px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(1.15);
  box-shadow:0 18px 40px rgba(0,0,0,.22);
  scroll-margin-top:28px;
  transition:box-shadow .3s ease;
}
.body article::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,rgba(255,0,0,.72),rgba(255,20,147,.55),transparent);
}
.body article.hit{
  box-shadow:0 0 0 2px rgba(255,20,147,.65),0 18px 40px rgba(0,0,0,.3);
}
.body h2{
  margin:0 0 6px;
  font-size:clamp(1.35rem,2.6vw,1.75rem);
  line-height:1.28;
  letter-spacing:-.01em;
  color:#fff;
}
.body h3{
  margin:26px 0 8px;
  font-size:1.15rem;
  color:#ffdde9;
}
.body hr{
  width:74px;
  height:3px;
  border:0;
  margin:12px 0 20px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--red),var(--pink));
}
.body p{margin:0 0 15px;color:#eadfdf}
.body ul,.body ol{margin:0 0 16px;padding-left:20px;color:#eadfdf}
.body li{margin:6px 0}
.body strong{color:#fff}
.body a{
  color:#ff90bd;
  text-decoration:none;
  border-bottom:1px solid rgba(255,144,189,.35);
}
.body a:hover{color:#fff;border-color:#fff}
.body blockquote{
  margin:0 0 16px;
  padding:10px 16px;
  border-left:3px solid var(--pink);
  background:rgba(255,20,147,.08);
}
.body code{
  font-size:.95em;
  padding:1px 5px;
  border-radius:3px;
  background:rgba(255,255,255,.1);
}

/* ---------- footer ---------- */
.foot-band{
  margin-top:12px;
  border-top:1px solid var(--line);
  background:rgba(21,13,13,.62);
  backdrop-filter:blur(12px);
}
.foot-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 16px;
  padding-top:14px;
  padding-bottom:14px;
  font-size:14px;
  color:#b7a4a4;
}
.foot-row article{min-width:0}
.f-a{display:flex;align-items:center;color:#fff;font-weight:600;letter-spacing:.02em}
.f-b{display:flex;flex-wrap:wrap;gap:0 16px}
.f-b a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--dim);
  text-decoration:none;
}
.f-b a:hover{color:#fff}
.f-c{color:#9d8a8a}

/* ---------- dock ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  background:rgba(28,16,16,.74);
  backdrop-filter:blur(18px) saturate(1.4);
  border-top:1px solid rgba(255,255,255,.14);
  box-shadow:0 -14px 40px rgba(0,0,0,.44);
}
.dock ol{
  display:flex;
  align-items:center;
  gap:2px;
  max-width:1140px;
  margin:0 auto;
  padding:8px 12px;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:none;
}
.dock ol::-webkit-scrollbar{display:none}
.dock li{flex:0 0 auto}
.dock a{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:44px;
  padding:10px 12px;
  border-radius:var(--radius);
  color:var(--dim);
  text-decoration:none;
  font-size:14px;
  white-space:nowrap;
  transition:color .22s ease,background .22s ease;
}
.dock a:hover{color:#fff;background:rgba(255,255,255,.08)}
.dock a .ico{
  flex:0 0 auto;
  width:8px;
  height:8px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--red),var(--pink));
  opacity:.65;
}
.dock a.on{
  color:#fff;
  background:rgba(255,0,0,.22);
  box-shadow:inset 0 0 0 1px rgba(255,20,147,.42);
}
.dock .dock-brand a{color:#fff;font-weight:600;gap:9px}
.mark{
  display:block;
  width:24px;
  height:24px;
  border-radius:var(--radius);
  object-fit:cover;
}
.find{display:flex;align-items:center;gap:6px;padding-left:4px}
.find input{
  width:132px;
  min-height:40px;
  height:40px;
  padding:0 10px;
  font:inherit;
  font-size:14px;
  color:#fff;
  background:rgba(255,255,255,.08);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.find input::placeholder{color:#a99696}
.find input:focus{outline:2px solid var(--pink);outline-offset:1px}
.find button{
  min-height:40px;
  padding:0 13px;
  font:inherit;
  font-size:14px;
  color:#fff;
  border:0;
  border-radius:var(--radius);
  background:linear-gradient(120deg,var(--red),var(--pink));
  cursor:pointer;
}
.find button:hover{filter:brightness(1.12)}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}

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

/* ---------- responsive ---------- */
@media (min-width:901px){
  .dock ol{justify-content:center}
}

@media (max-width:900px){
  .main-grid{
    grid-template-columns:minmax(0,1fr);
    gap:20px;
    padding-top:26px;
  }
  .rail{position:static;padding:12px 14px}
  .rail ol{
    display:flex;
    overflow-x:auto;
    gap:6px;
    scrollbar-width:none;
  }
  .rail ol::-webkit-scrollbar{display:none}
  .rail a{
    white-space:nowrap;
    padding:10px 12px;
    background:rgba(255,255,255,.06);
  }
  .rail a::before{content:none}
  .to-top{display:none}
  .body article{padding:20px 16px 24px}
  .hero{min-height:44vh;padding:50px 0 34px}
  .foot-row{justify-content:flex-start;gap:2px 14px}
  .dock .dock-brand{order:-1}
}

@media (max-width:560px){
  body{padding-bottom:106px}
  .dock ol{padding:6px 8px}
  .dock a{font-size:13px;padding:10px}
  .find input{width:96px}
  .find button{padding:0 10px}
  h1{letter-spacing:-.03em}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before,body::after,.g1,.g2,.chip i{animation:none}
  .rv{opacity:1;transform:none;transition:none}
  .body article{transition:none}
}

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