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

:root{
  --red:#ff0000;
  --pink:#ff1493;
  --ink:#261717;
  --night:#0d0607;
  --night2:#1b0d10;
  --fg:#f8edee;
  --dim:#c9aeb3;
  --line:rgba(255,255,255,.13);
  --glass:rgba(255,255,255,.055);
  --pad:clamp(16px,4vw,46px);
  --dock:72px;
}

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

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

body{
  margin:0;
  min-height:100%;
  background:radial-gradient(120% 80% at 50% 0%,#1d0f13 0%,var(--night) 62%);
  color:var(--fg);
  font-family:'Rubik',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.72;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
  padding-bottom:calc(var(--dock) + 26px);
}

h1,h2,h3,h4,.dock-brand,.veil-link,.foot-mark,.hero-num{
  font-family:'Outfit','Rubik',system-ui,sans-serif;
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.1;
}

img{display:block;max-width:100%;height:auto}

a{color:var(--fg);text-decoration:none}
a:hover{color:#fff}

:focus-visible{outline:2px solid var(--pink);outline-offset:3px}

/* ---------- 极光背景 ---------- */
.sky{
  position:fixed;
  inset:-22% -14%;
  z-index:-2;
  pointer-events:none;
  filter:saturate(1.3) blur(38px);
  will-change:transform;
}
.sky span{
  position:absolute;
  inset:0;
  opacity:.9;
  mix-blend-mode:screen;
  background-size:200% 200%;
  background-repeat:no-repeat;
}
.sky span:nth-child(1){
  background:
    radial-gradient(46% 42% at 18% 22%,rgba(255,0,0,.55),transparent 68%),
    radial-gradient(44% 38% at 82% 12%,rgba(255,20,147,.48),transparent 70%);
  animation:drift 11s ease-in-out infinite alternate;
}
.sky span:nth-child(2){
  background:
    radial-gradient(52% 44% at 68% 74%,rgba(255,20,147,.42),transparent 72%),
    radial-gradient(40% 52% at 26% 84%,rgba(140,18,60,.55),transparent 74%);
  animation:drift 9s ease-in-out infinite alternate-reverse;
}
.sky span:nth-child(3){
  background:
    conic-gradient(from 120deg at 50% 50%,rgba(255,0,0,.24),rgba(255,20,147,.3),rgba(38,23,23,.5),rgba(255,0,0,.24));
  opacity:.5;
  animation:swirl 12s linear infinite;
}
@keyframes drift{
  from{background-position:0% 0%}
  to{background-position:100% 100%}
}
@keyframes swirl{
  from{transform:rotate(0) scale(1.05)}
  to{transform:rotate(360deg) scale(1.05)}
}

/* ---------- 底部条 ---------- */
.dock{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:80;
  display:flex;
  align-items:center;
  gap:10px;
  height:var(--dock);
  padding:0 12px calc(0px + env(safe-area-inset-bottom,0px));
  background:linear-gradient(180deg,rgba(24,12,15,.78),rgba(12,6,7,.94));
  border-top:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(1.4);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);
}
.dock::before{
  content:"";
  position:absolute;left:0;right:0;top:-1px;height:2px;
  background:linear-gradient(90deg,var(--red),var(--pink),transparent 85%);
  opacity:.85;
}
.dock-brand{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 8px 0 4px;
  font-size:1.18rem;
  background:linear-gradient(92deg,var(--red),var(--pink));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  white-space:nowrap;
}
.dock-search{flex:1;min-width:0;display:flex}
.dock-search input{
  width:100%;
  max-width:260px;
  height:44px;
  padding:0 14px;
  font:inherit;
  font-size:16px;
  color:var(--fg);
  background:rgba(255,255,255,.07);
  border:1px solid var(--line);
  border-radius:0;
  -webkit-appearance:none;
}
.dock-search input::placeholder{color:var(--dim)}
.dock-btn{
  height:44px;
  padding:0 18px;
  font:inherit;
  font-size:15px;
  font-weight:600;
  font-family:'Outfit',sans-serif;
  letter-spacing:.08em;
  color:#0e0708;
  background:linear-gradient(96deg,var(--red),var(--pink));
  border:0;
  border-radius:0;
  cursor:pointer;
}
.dock-btn:hover{filter:brightness(1.1)}

/* ---------- 全屏菜单 ---------- */
.veil{
  position:fixed;
  inset:0;
  z-index:90;
  display:flex;
  flex-direction:column;
  padding:18px var(--pad) calc(var(--dock) + 26px);
  background:radial-gradient(90% 70% at 80% 0%,rgba(255,20,147,.22),transparent 60%),rgba(11,6,7,.96);
  backdrop-filter:blur(22px);
  -webkit-backdrop-filter:blur(22px);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .32s ease,transform .32s ease,visibility .32s;
  overflow-y:auto;
}
.veil.on{opacity:1;visibility:visible;transform:none}
.veil-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.veil-brand{
  font-family:'Outfit',sans-serif;
  font-weight:700;
  font-size:1.1rem;
  letter-spacing:.14em;
  color:var(--dim);
}
.veil-x{
  min-height:44px;
  padding:0 20px;
  font:inherit;
  font-size:15px;
  color:var(--fg);
  background:transparent;
  border:1px solid var(--line);
  border-radius:0;
  cursor:pointer;
}
.veil-x:hover{border-color:var(--pink);color:#fff}
.veil-nav{
  display:flex;
  flex-direction:column;
  padding:22px 0 40px;
  max-width:760px;
}
.veil-link{
  display:block;
  padding:14px 2px;
  font-size:clamp(1.22rem,3.4vw,1.9rem);
  border-bottom:1px solid rgba(255,255,255,.08);
  color:var(--fg);
  transition:padding-left .22s ease,color .22s ease;
}
.veil-link::before{
  content:"";
  display:inline-block;
  width:0;
  height:2px;
  margin-right:0;
  vertical-align:middle;
  background:linear-gradient(90deg,var(--red),var(--pink));
  transition:width .22s ease,margin-right .22s ease;
}
.veil-link:hover{padding-left:4px;color:#fff}
.veil-link:hover::before{width:22px;margin-right:12px}
.veil-link.off{display:none}

/* ---------- 骨架 ---------- */
.shell{
  display:grid;
  grid-template-columns:minmax(0,232px) minmax(0,1fr);
  align-items:start;
  gap:0 clamp(18px,2.4vw,38px);
  max-width:1280px;
  margin:0 auto;
  padding:0 var(--pad) 30px;
}

/* ---------- 首屏 ---------- */
.hero{
  grid-column:2;
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:70vh;
  padding:64px 0 42px;
  overflow:hidden;
}
.hero-num{
  position:absolute;
  right:-.04em;
  top:6%;
  z-index:0;
  font-size:clamp(9rem,34vw,22rem);
  line-height:.78;
  color:transparent;
  -webkit-text-stroke:1.5px rgba(255,20,147,.34);
  opacity:.72;
  pointer-events:none;
  animation:breathe 10s ease-in-out infinite alternate;
}
@keyframes breathe{
  from{opacity:.34;transform:translate3d(0,8px,0)}
  to{opacity:.78;transform:translate3d(0,-10px,0)}
}
.hero h1{
  position:relative;
  z-index:1;
  margin:0;
  font-size:clamp(2.3rem,7.6vw,5rem);
  max-width:16em;
  text-align:left;
  background:linear-gradient(96deg,#fff 12%,#ffd7e6 42%,var(--pink) 78%,var(--red) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  text-shadow:0 0 46px rgba(255,20,147,.22);
}
.hero-rule{
  position:relative;
  z-index:1;
  display:block;
  width:min(240px,42%);
  height:3px;
  margin-top:30px;
  background:linear-gradient(90deg,var(--red),var(--pink),transparent);
}

/* ---------- 左侧栏 ---------- */
.board{grid-column:1;grid-row:1 / span 40}

.rail{
  position:sticky;
  top:26px;
  padding:16px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.rail-cap{
  margin:0 0 12px;
  font-family:'Outfit',sans-serif;
  font-size:12px;
  font-weight:600;
  letter-spacing:.34em;
  color:var(--pink);
}
.rail-list{
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:rail;
}
.rail-list li{counter-increment:rail}
.rail-list a{
  display:flex;
  align-items:baseline;
  gap:10px;
  min-height:40px;
  padding:8px 0;
  font-size:15px;
  line-height:1.4;
  color:var(--dim);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:color .2s ease;
}
.rail-list a::before{
  content:counter(rail,decimal-leading-zero);
  font-family:'Outfit',sans-serif;
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(255,20,147,.7);
}
.rail-list a:hover{color:#fff}

/* ---------- 引言 ---------- */
.intro{
  grid-column:2;
  padding:6px 0 30px;
}
.intro h2{
  margin:0 0 14px;
  font-size:clamp(1.6rem,3.4vw,2.4rem);
  letter-spacing:-.03em;
}
.intro .subtitle{
  margin:0 0 26px;
  max-width:58ch;
  color:var(--dim);
  font-size:1.02rem;
}
.aurora-fig{
  margin:0;
  height:clamp(96px,16vw,150px);
  border:1px solid var(--line);
  background:
    radial-gradient(60% 120% at 12% 0%,rgba(255,0,0,.6),transparent 62%),
    radial-gradient(70% 130% at 74% 100%,rgba(255,20,147,.55),transparent 64%),
    linear-gradient(120deg,rgba(38,23,23,.9),rgba(20,10,12,.9));
  background-size:200% 200%;
  filter:saturate(1.25);
  animation:drift 10s ease-in-out infinite alternate;
}

/* ---------- 正文区块 ---------- */
.shell > article:not(.hero):not(.board):not(.intro){
  grid-column:2;
  position:relative;
  margin:0 0 22px;
  padding:30px clamp(18px,2.6vw,34px) 32px;
  background:linear-gradient(158deg,rgba(255,255,255,.075),rgba(255,255,255,.018) 62%);
  border:1px solid var(--line);
  border-radius:0;
  backdrop-filter:blur(14px) saturate(1.25);
  -webkit-backdrop-filter:blur(14px) saturate(1.25);
  scroll-margin-top:84px;
  overflow:hidden;
}
.shell > article:not(.hero):not(.board):not(.intro)::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:linear-gradient(180deg,var(--red),var(--pink) 55%,transparent);
}
.shell > article:not(.hero):not(.board):not(.intro)::after{
  content:"";
  position:absolute;
  right:-70px;top:-70px;
  width:190px;height:190px;
  background:radial-gradient(circle,rgba(255,20,147,.26),transparent 68%);
  pointer-events:none;
}

.shell :is(h2,h3,h4){position:relative;z-index:1}
.shell h2{
  margin:0 0 14px;
  font-size:clamp(1.45rem,2.9vw,2.05rem);
  letter-spacing:-.025em;
}
.shell h3{
  margin:30px 0 10px;
  font-size:1.2rem;
}
.shell h4{margin:22px 0 8px;font-size:1.05rem}
.shell p{margin:0 0 16px;position:relative;z-index:1}
.shell p:last-child{margin-bottom:0}
.shell ul,.shell ol{margin:0 0 18px;padding-left:1.25em}
.shell li{margin:0 0 8px}
.shell li::marker{color:var(--pink)}
.shell a:not(.veil-link){
  color:#ffd0e0;
  text-decoration:underline;
  text-decoration-color:rgba(255,20,147,.55);
  text-underline-offset:3px;
}
.shell a:not(.veil-link):hover{color:#fff;text-decoration-color:var(--pink)}
.shell strong{color:#fff}
.shell blockquote{
  margin:0 0 18px;
  padding:14px 18px;
  border-left:2px solid var(--pink);
  background:rgba(255,20,147,.07);
  color:#f0dade;
}
.shell figure{margin:0 0 18px;position:relative;z-index:1}
.shell figcaption{
  margin-top:8px;
  font-size:14px;
  color:var(--dim);
}
.shell img{width:100%;border:1px solid var(--line)}
.shell table{
  width:100%;
  margin:0 0 18px;
  border-collapse:collapse;
  font-size:15px;
  display:block;
  overflow-x:auto;
}
.shell :is(th,td){
  padding:9px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.shell th{
  font-family:'Outfit',sans-serif;
  font-size:13px;
  letter-spacing:.1em;
  color:var(--pink);
  white-space:nowrap;
}
.shell aside{
  margin:0 0 18px;
  padding:16px 18px;
  border:1px dashed rgba(255,20,147,.4);
  background:rgba(255,255,255,.04);
}
.shell time{
  display:inline-block;
  font-family:'Outfit',sans-serif;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--dim);
}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;
  margin-top:56px;
  padding:44px var(--pad) calc(var(--dock) + 34px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,20,147,.07),transparent 55%);
}
.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) auto;
  gap:26px 30px;
  align-items:start;
  max-width:1280px;
  margin:0 auto;
}
.foot-mark a{
  display:inline-block;
  font-size:clamp(2.1rem,6vw,3.6rem);
  line-height:1;
  letter-spacing:-.035em;
  background:linear-gradient(96deg,var(--red),var(--pink) 72%,#fff);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.foot-nav dl{
  margin:0;
  display:grid;
  grid-template-columns:1fr;
  gap:0;
}
.foot-nav dt{margin:0}
.foot-nav dd{margin:0}
.foot-nav a{
  display:flex;
  align-items:center;
  min-height:40px;
  font-size:15px;
  color:var(--dim);
  border-bottom:1px solid rgba(255,255,255,.07);
}
.foot-nav a:hover{color:#fff}
.foot-note p{
  margin:0 0 8px;
  font-size:15px;
  color:var(--dim);
}
.foot-top button{
  min-height:44px;
  padding:0 18px;
  font:inherit;
  font-size:15px;
  color:var(--fg);
  background:transparent;
  border:1px solid var(--line);
  border-radius:0;
  cursor:pointer;
  white-space:nowrap;
}
.foot-top button:hover{border-color:var(--pink);color:#fff}
.foot-copy{
  max-width:1280px;
  margin:34px auto 0;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.07);
  text-align:center;
  font-family:'Outfit',sans-serif;
  font-size:13px;
  letter-spacing:.14em;
  color:rgba(201,174,179,.75);
}

/* ---------- 入场 ---------- */
html.js .shell > article:not(.hero){
  opacity:0;
  transform:translateY(22px);
}
html.js .shell > article.in{
  opacity:1;
  transform:none;
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1);
}
html.js .shell > article.in:nth-of-type(4){transition-delay:.04s}
html.js .shell > article.in:nth-of-type(5){transition-delay:.08s}
html.js .shell > article.in:nth-of-type(6){transition-delay:.12s}
html.js .shell > article.in:nth-of-type(7){transition-delay:.16s}
html.js .shell > article.in:nth-of-type(n+8){transition-delay:.2s}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .shell{display:block;max-width:820px}
  .hero{min-height:64vh;padding-top:52px}
  .rail{position:static;border-bottom:0;padding:10px 0 0}
  .rail-list{
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding-bottom:16px;
    counter-reset:none;
  }
  .rail-list li{flex:0 0 auto}
  .rail-list a{
    min-height:40px;
    padding:8px 14px;
    border:1px solid var(--line);
    white-space:nowrap;
    color:var(--fg);
  }
  .rail-list a::before{display:none}
  .intro{padding-top:18px}
  .foot-grid{
    grid-template-columns:1fr 1fr;
    gap:22px;
  }
  .foot-mark{grid-column:1 / -1}
  .foot-note{grid-column:1 / -1}
  .foot-top{grid-column:1 / -1}
}

@media (max-width:520px){
  body{font-size:16px}
  .dock-brand{font-size:1.02rem}
  .dock-search input{max-width:none}
  .hero{min-height:60vh;padding-top:44px}
  .hero h1{font-size:clamp(2rem,9.4vw,2.9rem)}
  .shell > article:not(.hero):not(.board):not(.intro){padding:24px 18px 26px}
  .foot-grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js .shell > article:not(.hero){opacity:1;transform:none}
}

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