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

:root{
  --night:#150c12;
  --ink:#26171f;
  --magenta:#ff0080;
  --violet:#ff00ff;
  --paper:#fbeef5;
  --soft:rgba(251,238,245,.74);
  --faint:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.055);
  --serif:'EB Garamond',Georgia,'Songti SC','Noto Serif SC',serif;
  --sans:'Lato','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  overflow-x:clip;
  -webkit-text-size-adjust:100%;
}
body{
  margin:0;
  min-height:100vh;
  background:var(--night);
  color:var(--paper);
  font-family:var(--sans);
  font-size:1.0625rem;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:-14%;
  z-index:-2;
  background:
    radial-gradient(38% 42% at 18% 22%, rgba(255,0,128,.58), transparent 68%),
    radial-gradient(32% 36% at 82% 14%, rgba(255,0,255,.44), transparent 70%),
    radial-gradient(46% 48% at 68% 84%, rgba(120,0,255,.42), transparent 72%),
    radial-gradient(30% 34% at 22% 78%, rgba(0,170,255,.20), transparent 70%),
    conic-gradient(from 200deg at 50% 50%, rgba(255,0,128,.24), rgba(255,0,255,.18), rgba(90,0,200,.28), rgba(255,0,128,.24));
  filter:blur(48px) saturate(155%) hue-rotate(0deg);
  animation:drift 26s ease-in-out infinite alternate, hue 36s linear infinite;
  will-change:transform,filter;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:linear-gradient(180deg, rgba(21,12,18,.22), rgba(21,12,18,.06) 40%, rgba(21,12,18,.34));
}

@keyframes drift{
  0%{transform:translate3d(-3%,-2%,0) rotate(-4deg) scale(1.08)}
  50%{transform:translate3d(2%,3%,0) rotate(3deg) scale(1.2)}
  100%{transform:translate3d(-2%,2%,0) rotate(-2deg) scale(1.12)}
}
@keyframes hue{
  0%{filter:blur(48px) saturate(155%) hue-rotate(0deg)}
  100%{filter:blur(48px) saturate(155%) hue-rotate(42deg)}
}

::selection{background:rgba(255,0,128,.45);color:#fff}

a{color:inherit}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.22;margin:0;letter-spacing:.01em}
p{margin:0 0 1.05em}

/* ---------- 页头 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(21,12,18,.66);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid var(--line);
}
.bar{
  max-width:1180px;
  margin-inline:auto;
  padding:9px clamp(14px,4vw,34px);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
}
.burger{
  justify-self:start;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 16px;
  font-family:var(--sans);
  font-size:1rem;
  letter-spacing:.14em;
  color:var(--paper);
  background:transparent;
  border:1px solid var(--line);
  border-radius:0;
  cursor:pointer;
  transition:border-color .25s, background .25s, color .25s;
}
.burger:hover{border-color:var(--magenta);background:rgba(255,0,128,.14);color:#fff}
.burger:focus-visible{outline:2px solid var(--violet);outline-offset:2px}

.brand{
  grid-column:2;
  justify-self:center;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 8px;
  font-family:var(--serif);
  font-size:clamp(1.1rem,2.6vw,1.4rem);
  letter-spacing:.2em;
  text-indent:.2em;
  text-decoration:none;
  color:var(--paper);
  white-space:nowrap;
  background:linear-gradient(96deg,#fff,#ffc9e7 55%,#e5a6ff);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.rail{
  border-top:1px solid rgba(255,255,255,.08);
  background:rgba(21,12,18,.42);
}
.rail-nav{
  max-width:1180px;
  margin-inline:auto;
  padding-inline:clamp(8px,3vw,26px);
  overflow-x:auto;
  scrollbar-width:none;
}
.rail-nav::-webkit-scrollbar{display:none}
.rail-nav p{display:flex;gap:2px;margin:0;padding-block:4px}
.rail-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 13px;
  font-size:1rem;
  letter-spacing:.07em;
  color:var(--soft);
  text-decoration:none;
  white-space:nowrap;
  border-bottom:1px solid transparent;
  transition:color .22s, border-color .22s, background .22s;
}
.rail-nav a:hover,.rail-nav a:focus-visible{color:#fff;border-color:var(--magenta);background:rgba(255,255,255,.05)}

/* ---------- 全屏遮罩菜单 ---------- */
.layer{
  position:fixed;
  inset:0;
  z-index:110;
  display:grid;
  place-items:center;
  padding:118px 20px 44px;
  background:rgba(16,8,13,.9);
  -webkit-backdrop-filter:blur(22px);
  backdrop-filter:blur(22px);
  opacity:0;
  visibility:hidden;
  transition:opacity .32s ease, visibility .32s;
}
body.is-open .layer{opacity:1;visibility:visible}
body.is-open{overflow:hidden}
.layer p{display:flex;flex-direction:column;align-items:center;gap:0;margin:0}
.layer a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:52px;
  padding:8px 26px;
  font-family:var(--serif);
  font-size:clamp(1.45rem,4.6vw,2.3rem);
  letter-spacing:.06em;
  text-decoration:none;
  color:var(--paper);
}
.layer a::after{
  content:"";
  position:absolute;
  left:26px;right:26px;bottom:9px;
  height:1px;
  background:linear-gradient(90deg,var(--magenta),var(--violet));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s ease;
}
.layer a:hover::after,.layer a:focus-visible::after{transform:scaleX(1)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  overflow:hidden;
  min-height:45vh;
  display:grid;
  place-items:center;
  text-align:center;
  padding:clamp(42px,9vw,84px) clamp(16px,5vw,40px);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:attr(data-ghost);
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  font-family:var(--serif);
  font-size:clamp(2.5rem,13vw,8.6rem);
  line-height:1;
  letter-spacing:-.03em;
  white-space:nowrap;
  color:transparent;
  -webkit-text-stroke:1px rgba(255,255,255,.24);
  pointer-events:none;
  user-select:none;
}
.hero-inner{position:relative;z-index:1}
.kicker{
  margin:0 0 14px;
  font-size:1rem;
  letter-spacing:.38em;
  text-indent:.38em;
  color:var(--soft);
}
.hero h1{
  font-size:clamp(1.95rem,6.2vw,3.8rem);
  font-weight:600;
  letter-spacing:.02em;
  background:linear-gradient(96deg,#fff 8%,#ffd2ea 44%,#ff7ec4 78%,#dfa4ff);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 6px 26px rgba(255,0,128,.32));
}

/* ---------- 主体骨架 ---------- */
.wrap{
  max-width:1180px;
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.stage{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(30px,5vw,56px);
  padding-block:clamp(28px,6vw,64px);
}
@media (min-width:960px){
  .stage{grid-template-columns:minmax(0,1fr) 258px;align-items:start}
}

.prose{min-width:0}
.prose article{
  padding-block:clamp(26px,4.4vw,50px);
  border-top:1px solid var(--line);
  scroll-margin-top:120px;
}
.prose article:first-child{border-top:0;padding-top:2px}
.prose h2{
  font-size:clamp(1.55rem,3.4vw,2.35rem);
  margin-bottom:.55em;
}
.prose h2 span,
.prose h3 span{
  background:linear-gradient(96deg,#fff 10%,#ffbfe2 58%,#ff7ec4);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.prose h3{
  font-size:clamp(1.2rem,2.2vw,1.55rem);
  margin:1.3em 0 .5em;
  color:#ffd9ee;
}
.prose p{margin:0 0 1.05em}
.prose ul,.prose ol{margin:0 0 1.15em;padding-left:1.35em}
.prose li{margin:.35em 0}
.prose strong{color:#fff}
.prose a{color:#ff93d2;text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:#fff}
.prose blockquote{
  margin:1.2em 0;
  padding:14px 20px;
  border-left:2px solid var(--magenta);
  background:var(--glass);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.prose figure{margin:1.3em 0}
.prose figcaption{font-size:1rem;color:var(--soft);margin-top:.5em}

.js-on .prose article{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .6s ease, transform .6s cubic-bezier(.2,.7,.3,1);
}
.js-on .prose article.in{opacity:1;transform:none}

/* ---------- 侧栏 ---------- */
.side-band{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:0;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  padding:18px 14px 14px;
}
@media (min-width:960px){
  .side-band{position:sticky;top:132px}
}
.side-band h2{
  font-size:1.15rem;
  letter-spacing:.22em;
  text-indent:.22em;
  margin-bottom:8px;
  padding-left:6px;
}
.side-band h2 span{
  background:linear-gradient(96deg,#fff,#ffa8d8);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.side-band p{display:flex;flex-direction:column;margin:0}
.side-band a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:0 8px;
  font-size:1rem;
  color:var(--soft);
  text-decoration:none;
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:color .2s, background .2s, padding-left .2s;
}
.side-band a:last-child{border-bottom:0}
.side-band a:hover{color:#fff;background:rgba(255,255,255,.06);padding-left:14px}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:clamp(40px,7vw,76px);
  border-top:1px solid var(--line);
  background:rgba(14,7,12,.58);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  padding:clamp(32px,5.5vw,58px) clamp(16px,4vw,40px) 20px;
}
.foot-top{
  max-width:1180px;
  margin-inline:auto;
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
}
@media (min-width:760px){
  .foot-top{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:24px;align-items:start}
}
.foot-brand h2{
  font-size:clamp(1.9rem,6vw,3.4rem);
  line-height:1.08;
  letter-spacing:-.01em;
}
.foot-brand h2 span{
  background:linear-gradient(96deg,#fff 6%,#ffb9e0 46%,#ff6fbe 74%,#daa4ff);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.foot dl{margin:0}
.foot dt{
  font-size:1rem;
  letter-spacing:.24em;
  text-indent:.24em;
  color:rgba(251,238,245,.55);
  margin-bottom:6px;
}
.foot dd{margin:0}
.foot dd a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:2px 0;
  font-size:1rem;
  color:var(--paper);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s, border-color .2s;
}
.foot dd a:hover{color:#ffa8d8;border-color:var(--magenta)}
.foot-line{
  max-width:1180px;
  margin:clamp(22px,4vw,36px) auto 0;
  padding-top:14px;
  border-top:1px solid rgba(255,255,255,.09);
}
.copy{
  margin:0;
  font-size:1rem;
  letter-spacing:.1em;
  color:rgba(251,238,245,.6);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width:599px){
  .rail-nav a{padding:0 10px;font-size:1rem}
  .hero{min-height:44vh}
  .foot-top{gap:18px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  .js-on .prose article{opacity:1;transform:none;transition:none}
  .layer, .layer a::after, .rail-nav a, .side-band a, .foot dd a{transition:none}
}

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