@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{
  --red:#ff0000;
  --pink:#ff006e;
  --ink:#1a1a2e;
  --deep:#0f0d1a;
  --txt:#efeaf8;
  --dim:#a89ec4;
  --line:rgba(255,0,110,.24);
  --cyan:#35f0ff;
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:var(--deep);
  color:var(--txt);
  font-family:'Figtree','Noto Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:17px;
  line-height:1.72;
  letter-spacing:.01em;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,0,110,.085) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,0,110,.085) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 50% 12%,#000 18%,transparent 76%);
  mask-image:radial-gradient(circle at 50% 12%,#000 18%,transparent 76%);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.05) 0 1px,transparent 1px 3px);
  opacity:.6;
  mix-blend-mode:screen;
}

body.menu-open{overflow:hidden}

a{color:var(--pink)}

img{max-width:100%}

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(13,11,24,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.ticker{
  margin:0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:6px 16px;
  font-size:12px;
  letter-spacing:.22em;
  color:var(--pink);
  border-bottom:1px solid rgba(255,0,110,.12);
  text-shadow:0 0 10px rgba(255,0,110,.55);
}

.bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  max-width:1120px;
  margin:0 auto;
  padding:10px 16px;
}

.mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:46px;
  min-height:46px;
  padding:4px;
  border:1px solid var(--line);
  border-radius:4px;
  text-decoration:none;
  background:rgba(255,0,110,.05);
  box-shadow:0 0 14px rgba(255,0,110,.22),0 0 14px rgba(255,0,110,.16) inset;
  transition:box-shadow .25s ease,transform .25s ease;
}

.mark:hover,.mark:focus-visible{
  transform:translateY(-1px);
  box-shadow:0 0 20px rgba(255,0,110,.6),0 0 16px rgba(255,0,110,.3) inset;
}

.mark-img{display:block;width:34px;height:34px;object-fit:contain}

.mark-txt{
  font-weight:700;
  font-size:.86rem;
  letter-spacing:.06em;
  color:var(--pink);
}

.burger{
  position:relative;
  z-index:65;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:46px;
  padding:8px 14px;
  background:rgba(255,0,110,.05);
  color:var(--txt);
  border:1px solid var(--line);
  border-radius:4px;
  font:inherit;
  font-size:14px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:box-shadow .25s ease,color .25s ease;
}

.burger:hover,.burger:focus-visible{
  color:var(--pink);
  box-shadow:0 0 18px rgba(255,0,110,.45);
}

.bars{
  display:flex;
  flex-direction:column;
  gap:3px;
  width:16px;
}

.bars span{
  display:block;
  height:2px;
  background:var(--pink);
  box-shadow:0 0 8px var(--pink);
  transition:transform .25s ease,opacity .25s ease;
}

body.menu-open .bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
body.menu-open .bars span:nth-child(2){opacity:0}
body.menu-open .bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 全屏菜单 ---------- */
.menu{
  position:fixed;
  inset:0;
  z-index:60;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:100px 20px 44px;
  overflow:auto;
  background:rgba(9,7,16,.97);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;
}

body.menu-open .menu{opacity:1;visibility:visible}

.menu p{
  display:flex;
  flex-direction:column;
  gap:2px;
  width:min(560px,100%);
  margin:0;
  text-align:center;
}

.menu a{
  display:block;
  min-height:44px;
  padding:14px 18px;
  color:var(--txt);
  text-decoration:none;
  font-size:1.06rem;
  letter-spacing:.04em;
  border-bottom:1px solid rgba(255,0,110,.16);
  transition:color .2s ease,background .2s ease,text-shadow .2s ease;
}

.menu a:hover,.menu a:focus-visible{
  color:var(--pink);
  background:rgba(255,0,110,.08);
  text-shadow:0 0 14px rgba(255,0,110,.8);
}

/* ---------- 主区 ---------- */
main{
  position:relative;
  z-index:1;
  max-width:1120px;
  margin:0 auto;
  padding:0 16px 56px;
}

.hero{
  display:grid;
  grid-template-columns:96px minmax(0,1fr) 250px;
  gap:28px;
  align-items:center;
  min-height:70vh;
  padding:44px 0 30px;
}

.hero-fig{
  display:flex;
  justify-content:center;
  margin:0;
}

.hero-svg,.hero-img{
  width:100%;
  max-width:116px;
  height:auto;
  border-radius:4px;
  filter:drop-shadow(0 0 18px rgba(255,0,110,.55));
}

.hero-copy{text-align:center;min-width:0}

h1{
  margin:0 0 14px;
  font-size:clamp(2rem,6.2vw,3.35rem);
  line-height:1.14;
  font-weight:700;
  letter-spacing:-.012em;
  color:#fff;
  text-shadow:0 0 12px rgba(255,0,110,.85),0 0 34px rgba(255,0,0,.45);
}

.glitch{animation:glitch 7s steps(1) infinite}

@keyframes glitch{
  0%,91%,100%{transform:none;text-shadow:0 0 12px rgba(255,0,110,.85),0 0 34px rgba(255,0,0,.45)}
  92%{transform:translate(-2px,1px) skewX(-1.6deg);text-shadow:2px 0 var(--pink),-2px 0 var(--cyan),0 0 22px rgba(255,0,110,.8)}
  94%{transform:translate(2px,-1px) skewX(1.1deg);text-shadow:-2px 0 var(--pink),2px 0 var(--cyan)}
  96%{transform:translate(-1px,0);text-shadow:0 0 12px rgba(255,0,110,.85)}
}

.hero-desc{
  max-width:48ch;
  margin:0 auto;
  color:var(--dim);
  font-size:1.02rem;
}

/* ---------- 侧栏 ---------- */
.side{
  align-self:stretch;
  padding:6px 0 6px 18px;
  border-left:1px solid var(--line);
}

.side-title{
  margin:0 0 12px;
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.24em;
  color:var(--pink);
}

.side-title span{
  display:inline-block;
  padding-bottom:4px;
  border-bottom:1px solid var(--pink);
}

.side-list{
  list-style:none;
  margin:0 0 18px;
  padding:0;
  counter-reset:sidec;
}

.side-list li{counter-increment:sidec}

.side-list a{
  display:block;
  min-height:34px;
  padding:6px 0;
  color:var(--dim);
  text-decoration:none;
  font-size:.92rem;
  transition:color .2s ease,text-shadow .2s ease;
}

.side-list a::before{
  content:counter(sidec,decimal-leading-zero);
  margin-right:9px;
  color:var(--red);
  font-variant-numeric:tabular-nums;
  font-size:.82rem;
  opacity:.85;
}

.side-list a:hover,.side-list a:focus-visible{
  color:#fff;
  text-shadow:0 0 12px rgba(255,0,110,.9);
}

.side-sub{
  margin:0 0 8px;
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.24em;
  color:var(--pink);
}

.side-sub span{display:inline-block}

.to-top{
  display:inline-block;
  min-height:42px;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:4px;
  color:var(--txt);
  text-decoration:none;
  font-size:.88rem;
  transition:box-shadow .25s ease,color .25s ease;
}

.to-top:hover,.to-top:focus-visible{
  color:var(--pink);
  box-shadow:0 0 16px rgba(255,0,110,.45);
}

/* ---------- 正文区块 ---------- */
main > section[id]{
  max-width:800px;
  margin:0 auto;
  padding:46px 0;
  border-top:1px dashed rgba(255,0,110,.22);
  scroll-margin-top:106px;
}

main > section[id]:first-of-type{border-top:0}

section[id] h2{
  margin:0 0 16px;
  font-size:clamp(1.35rem,3.6vw,1.9rem);
  line-height:1.28;
  color:#fff;
  text-shadow:0 0 10px rgba(255,0,110,.55),0 0 24px rgba(255,0,0,.25);
}

section[id] h2 span{display:inline-block}

section[id] h2 span::before{
  content:"";
  display:inline-block;
  width:10px;
  height:10px;
  margin-right:11px;
  background:var(--red);
  box-shadow:0 0 14px var(--red);
  vertical-align:middle;
}

section[id] h3{
  margin:26px 0 10px;
  font-size:1.12rem;
  color:var(--pink);
  text-shadow:0 0 10px rgba(255,0,110,.4);
}

section[id] p{color:#ded7ee;margin:0 0 15px}

section[id] figure{
  margin:24px 0;
  padding:12px;
  background:rgba(255,0,110,.045);
  border:1px solid var(--line);
  border-radius:4px;
  box-shadow:0 14px 32px rgba(0,0,0,.5),0 0 18px rgba(255,0,110,.12);
}

section[id] figure img{
  display:block;
  width:100%;
  height:auto;
  border-radius:4px;
}

section[id] aside{
  margin:24px 0;
  padding:14px 16px;
  border-left:2px solid var(--pink);
  background:rgba(255,0,110,.06);
  border-radius:0 4px 4px 0;
  box-shadow:0 12px 26px rgba(0,0,0,.4);
}

section[id] ul,section[id] ol{
  margin:0 0 16px;
  padding-left:20px;
}

section[id] li{margin:0 0 8px}

section[id] img{
  height:auto;
  border-radius:4px;
}

section[id] blockquote{
  margin:22px 0;
  padding:12px 18px;
  border-left:2px solid var(--red);
  background:rgba(255,255,255,.03);
  color:var(--dim);
}

section[id] table{
  width:100%;
  border-collapse:collapse;
  margin:20px 0;
  font-size:.95rem;
}

section[id] th,section[id] td{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
}

section[id] a{
  color:var(--pink);
  text-underline-offset:3px;
}

section[id] a:hover{text-shadow:0 0 12px rgba(255,0,110,.7)}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  max-width:1120px;
  margin:0 auto;
  padding:38px 16px 26px;
  border-top:1px solid var(--line);
  font-size:.9rem;
  color:var(--dim);
}

.foot p{margin:0;min-width:0}

.f-brand{
  font-weight:700;
  color:#fff;
  letter-spacing:.05em;
  text-shadow:0 0 14px rgba(255,0,110,.6);
}

.f-col,.f-host{line-height:1.95;word-break:break-word}

.f-copy{
  grid-column:1/-1;
  margin-top:10px!important;
  padding-top:14px;
  border-top:1px dashed rgba(255,0,110,.2);
  text-align:center;
  color:var(--dim);
}

.f-small{
  grid-column:1/-1;
  text-align:center;
  font-size:.78rem;
  letter-spacing:.2em;
  color:rgba(168,158,196,.72);
}

/* ---------- 滚动揭示 ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s ease,transform .55s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .hero{
    grid-template-columns:1fr;
    gap:20px;
    min-height:0;
    padding:34px 0 24px;
  }
  .hero-fig{order:-1}
  .hero-svg,.hero-img{max-width:104px}
  .side{
    border-left:0;
    border-top:1px solid var(--line);
    padding:18px 0 0;
    text-align:left;
  }
  .side-list{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:0 16px;
  }
  .foot{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  body{font-size:16px}
  main{padding:0 14px 44px}
  .bar{padding:8px 14px}
  .ticker{padding:6px 14px;font-size:11px;letter-spacing:.16em}
  main > section[id]{padding:36px 0;scroll-margin-top:96px}
  .foot{padding:30px 14px 22px;gap:14px}
  .menu p{width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .glitch{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
  .bars span,.mark,.burger,.to-top{transition:none}
}

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