:root{
  --plum:#26171f;
  --deep:#170d13;
  --pink:#ff0080;
  --mag:#ff00ff;
  --paper:#fbeaf3;
  --dim:#d3b6c8;
  --line:rgba(255,255,255,.14);
  --r:28px;
  --max:1120px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  min-height:100vh;
  font-family:'Raleway',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.78;
  color:var(--paper);
  background-color:var(--plum);
  background-image:
    radial-gradient(52vw 48vh at 8% -4%, rgba(255,0,128,.55), transparent 62%),
    radial-gradient(46vw 42vh at 96% 6%, rgba(255,0,255,.42), transparent 60%),
    radial-gradient(70vw 58vh at 46% 104%, rgba(255,0,128,.34), transparent 66%),
    radial-gradient(40vw 40vh at 82% 74%, rgba(255,0,255,.22), transparent 60%);
  background-repeat:no-repeat;
  background-size:170% 170%,160% 160%,190% 190%,150% 150%;
  background-attachment:fixed;
  animation:aurora 26s ease-in-out infinite alternate;
}

@keyframes aurora{
  0%{background-position:0% 0%,100% 0%,50% 100%,80% 60%}
  50%{background-position:22% 18%,72% 26%,38% 82%,58% 70%}
  100%{background-position:48% 36%,44% 52%,66% 62%,30% 44%}
}

@keyframes blink{
  0%,100%{opacity:.45;transform:scale(.85)}
  50%{opacity:1;transform:scale(1.15)}
}

@keyframes rise{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:none}
}

/* ---------- 顶栏 ---------- */
.masthead{
  position:relative;
  z-index:6;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(23,13,19,.78),rgba(23,13,19,.18));
  backdrop-filter:blur(8px);
}

.strip{
  margin:0;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:40px;
  font-size:16px;
  letter-spacing:.26em;
  color:rgba(251,234,243,.84);
  border-bottom:1px solid rgba(255,255,255,.07);
}

.pulse{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--mag);
  box-shadow:0 0 12px var(--mag);
  animation:blink 2.6s ease-in-out infinite;
}

.bar{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:12px;
  max-width:var(--max);
  margin:0 auto;
  padding:8px 20px 14px;
}

.brand{
  justify-self:center;
  font-family:'Lora',Georgia,'Songti SC',serif;
  font-size:clamp(20px,3.4vw,27px);
  letter-spacing:.16em;
  font-weight:600;
  white-space:nowrap;
  text-decoration:none;
  color:#fff;
  background:linear-gradient(96deg,#fff 8%,var(--pink) 44%,var(--mag) 70%,#fff 96%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.dd{position:relative}
.dd-l{justify-self:start}
.dd-r{justify-self:end}

.dd summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:16px;
  letter-spacing:.1em;
  color:var(--paper);
  background:rgba(255,255,255,.05);
  transition:border-color .25s,background .25s;
}

.dd summary::-webkit-details-marker{display:none}
.dd summary:hover{border-color:rgba(255,0,128,.7);background:rgba(255,0,128,.16)}

.bars{
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  box-shadow:0 5px 0 currentColor,0 -5px 0 currentColor;
}

.dd menu{
  position:absolute;
  top:calc(100% + 10px);
  left:0;
  z-index:20;
  margin:0;
  padding:8px;
  list-style:none;
  min-width:190px;
  display:grid;
  gap:4px;
  border-radius:20px;
  border:1px solid var(--line);
  background:rgba(23,13,19,.94);
  backdrop-filter:blur(12px);
  box-shadow:0 22px 48px rgba(0,0,0,.45);
}

.dd-r menu{left:auto;right:0}

.dd menu a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 12px;
  border-radius:14px;
  font-size:16px;
  text-decoration:none;
  color:var(--paper);
  transition:background .2s,transform .2s;
}

.dd menu a:hover{
  background:linear-gradient(90deg,rgba(255,0,128,.32),rgba(255,0,255,.16));
  transform:translateX(2px);
}

.tick{
  width:6px;
  height:6px;
  border-radius:50%;
  flex:0 0 auto;
  background:linear-gradient(135deg,var(--pink),var(--mag));
  box-shadow:0 0 8px rgba(255,0,255,.8);
}

/* ---------- 粘性锚点条 ---------- */
.rail{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  gap:6px;
  overflow-x:auto;
  padding:8px 16px;
  border-bottom:1px solid var(--line);
  background:rgba(23,13,19,.82);
  backdrop-filter:blur(14px);
  scrollbar-width:none;
}

.rail::-webkit-scrollbar{display:none}

.rail a{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  min-height:40px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:16px;
  text-decoration:none;
  color:var(--dim);
  transition:color .2s,border-color .2s,background .2s;
}

.rail a:hover{color:#fff;border-color:var(--line);background:rgba(255,255,255,.07)}

/* ---------- 主体 ---------- */
main{
  max-width:var(--max);
  margin:0 auto;
  padding:0 20px 56px;
}

.hero{
  min-height:70vh;
  display:grid;
  grid-template-columns:1.08fr .92fr;
  align-items:center;
  gap:44px;
  padding:44px 0 40px;
  text-align:center;
}

.hero-copy h1{
  margin:0 0 18px;
  font-family:'Lora',Georgia,'Songti SC',serif;
  font-size:clamp(30px,5.2vw,54px);
  line-height:1.28;
  font-weight:600;
  letter-spacing:.02em;
  background:linear-gradient(110deg,#fff 6%,#ffd6ea 30%,var(--pink) 58%,var(--mag) 84%,#fff 99%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.lede{
  margin:0 auto;
  max-width:36ch;
  color:var(--dim);
  font-size:17px;
}

.cta{margin:26px 0 0}

.btn{
  display:inline-flex;
  align-items:center;
  min-height:52px;
  padding:0 32px;
  border-radius:999px;
  text-decoration:none;
  font-size:17px;
  font-weight:600;
  letter-spacing:.08em;
  color:#1b0d15;
  background:linear-gradient(100deg,var(--pink),var(--mag));
  box-shadow:0 16px 40px rgba(255,0,128,.35);
  transition:transform .25s,box-shadow .25s;
}

.btn:hover{transform:translateY(-2px);box-shadow:0 20px 48px rgba(255,0,255,.45)}

.hero-art{
  position:relative;
  min-height:300px;
  border-radius:var(--r);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.2);
  background:
    conic-gradient(from 200deg at 60% 40%, rgba(255,0,128,.55), rgba(255,0,255,.42), rgba(255,255,255,.12), rgba(255,0,128,.5));
}

.hero-img{
  display:block;
  width:100%;
  height:100%;
  min-height:300px;
  object-fit:cover;
  mix-blend-mode:screen;
}

/* ---------- 正文 + 侧栏 ---------- */
.stage{
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:40px;
  align-items:start;
}

.prose [id]{scroll-margin-top:76px}

.prose > div{
  position:relative;
  margin:0 0 28px;
  padding:28px 28px 32px;
  border-radius:var(--r);
  border:1px solid var(--line);
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(4px);
  opacity:0;
  transform:translateY(16px);
  animation:rise .7s cubic-bezier(.22,.68,.35,1) forwards;
}

.prose > div::after{
  content:"";
  position:absolute;
  left:28px;
  right:28px;
  bottom:0;
  height:3px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--pink),var(--mag));
  opacity:.75;
}

.prose > div:nth-child(1){animation-delay:.04s}
.prose > div:nth-child(2){animation-delay:.1s}
.prose > div:nth-child(3){animation-delay:.16s}
.prose > div:nth-child(4){animation-delay:.22s}
.prose > div:nth-child(5){animation-delay:.28s}
.prose > div:nth-child(6){animation-delay:.34s}
.prose > div:nth-child(7){animation-delay:.4s}
.prose > div:nth-child(n+8){animation-delay:.46s}

.prose h2,
.prose h3{
  font-family:'Lora',Georgia,'Songti SC',serif;
  line-height:1.4;
  color:#fff;
}

.prose h2{margin:0 0 16px;font-size:clamp(22px,2.8vw,30px);font-weight:600}
.prose h3{margin:26px 0 12px;font-size:20px}

.prose p{margin:0 0 1em}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.35em}
.prose li{margin:0 0 .45em}
.prose strong{color:#fff}
.prose a{color:#ff93c9;text-decoration:underline;text-underline-offset:3px;word-break:break-word}
.prose a:hover{color:#fff}

.prose blockquote{
  margin:1.2em 0;
  padding:.2em 0 .2em 1.1em;
  border-left:3px solid var(--pink);
  color:var(--dim);
}

.prose img{max-width:100%;height:auto;border-radius:18px}

/* ---------- 右侧栏 ---------- */
.side{
  position:sticky;
  top:70px;
  order:2;
  padding:20px;
  border-radius:var(--r);
  border:1px solid var(--line);
  background:rgba(23,13,19,.62);
  backdrop-filter:blur(10px);
}

.side small{
  display:block;
  font-size:16px;
  letter-spacing:.22em;
  color:var(--pink);
}

.side h2{
  margin:6px 0 14px;
  font-family:'Lora',Georgia,'Songti SC',serif;
  font-size:22px;
  color:#fff;
}

.jump{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.jump a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:0 10px;
  border-radius:12px;
  border-left:2px solid transparent;
  font-size:16px;
  text-decoration:none;
  color:var(--dim);
  transition:color .2s,background .2s,border-color .2s;
}
.jump a:hover{color:#fff;background:rgba(255,255,255,.08);border-left-color:var(--pink)}

/* ---------- 页脚 ---------- */
.base{
  position:relative;
  margin-top:16px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(23,13,19,.42),rgba(23,13,19,.9));
}

.base-in{
  max-width:var(--max);
  margin:0 auto;
  padding:44px 20px 30px;
}

.sub-block{
  margin:0 0 34px;
  padding:18px;
  border-radius:var(--r);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(255,0,128,.2),rgba(255,0,255,.12));
}

.sub{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.sub label{font-size:16px;letter-spacing:.12em;color:var(--paper)}

.sub input{
  flex:1 1 200px;
  min-height:48px;
  padding:0 16px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.24);
  background:rgba(0,0,0,.3);
  color:var(--paper);
  font:inherit;
}

.sub input:focus{outline:2px solid var(--mag);outline-offset:2px}

.sub button{
  min-height:48px;
  padding:0 28px;
  border:0;
  border-radius:16px;
  font:inherit;
  font-weight:600;
  letter-spacing:.08em;
  color:#1b0d15;
  background:linear-gradient(100deg,var(--pink),var(--mag));
  cursor:pointer;
  transition:transform .2s;
}

.sub button:hover{transform:translateY(-2px)}

.cols{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:28px;
}

.foot-brand{
  font-family:'Lora',Georgia,'Songti SC',serif;
  font-size:20px;
  letter-spacing:.14em;
  color:#fff;
}

.base dl{margin:0}
.base dt{
  margin:0 0 10px;
  font-size:16px;
  letter-spacing:.2em;
  color:var(--pink);
}
.base dd{margin:0}

.base dd a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  text-decoration:none;
  color:var(--dim);
  transition:color .2s;
}
.base dd a:hover{color:#fff}

.bar-b{
  margin-top:34px;
  padding-top:22px;
  border-top:1px solid var(--line);
  text-align:center;
}

.copy{margin:0 0 8px;font-size:16px;color:var(--dim)}

.meta{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:16px;
  margin:0;
  font-size:16px;
  color:rgba(211,182,200,.72);
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .hero{
    grid-template-columns:1fr;
    gap:28px;
    min-height:0;
    padding:32px 0 24px;
  }
  .hero-art,
  .hero-img{min-height:220px}
  .stage{grid-template-columns:1fr;gap:28px}
  .side{position:static;top:auto;order:0}
  .cols{grid-template-columns:1fr 1fr}
  .base-in{padding:34px 18px 26px}
}

@media (max-width:560px){
  .bar{padding:8px 14px 12px;gap:8px}
  .dd summary{padding:0 12px;gap:7px}
  .dd-menu,.dd menu{min-width:170px}
  .rail a{padding:0 12px}
  main{padding:0 14px 44px}
  .prose > div{padding:22px 18px 26px}
  .prose > div::after{left:18px;right:18px}
  .cols{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body,.pulse,.prose > div{animation:none}
  .prose > div{opacity:1;transform:none}
  *{transition:none}
}

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