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

:root{
  --ink:#26171f;
  --pink:#ff0080;
  --magenta:#ff00ff;
  --paper:#f9eef6;
  --dim:#cfb4c6;
  --line:rgba(255,255,255,.14);
  --rail:76px;
  --edge:clamp(16px,4vw,52px);
}

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

html{
  background:#140b11;
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  padding-left:var(--rail);
  min-height:100vh;
  overflow-x:hidden;
  color:var(--paper);
  font-family:'Barlow','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  font-size:17px;
  line-height:1.72;
  font-weight:400;
  letter-spacing:.01em;
}

body::before{
  content:"";
  position:fixed;
  inset:-25%;
  z-index:-2;
  background:
    radial-gradient(46% 46% at 74% 18%, #ff0080 0%, rgba(255,0,128,0) 68%),
    radial-gradient(44% 44% at 20% 74%, #ff00ff 0%, rgba(255,0,255,0) 66%),
    radial-gradient(58% 58% at 50% 50%, #4a1236 0%, rgba(38,23,31,0) 72%),
    conic-gradient(from 20deg at 50% 50%, #ff0080, #a300a3, #26171f, #ff00ff, #ff0080);
  filter:blur(56px) saturate(1.15);
  opacity:.72;
  animation:aurora 30s linear infinite;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg, rgba(255,255,255,.045) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0 1px, transparent 1px 88px);
  -webkit-mask-image:radial-gradient(120% 100% at 50% 0%, #000 20%, transparent 88%);
  mask-image:radial-gradient(120% 100% at 50% 0%, #000 20%, transparent 88%);
}

@keyframes aurora{
  from{transform:rotate(0deg) scale(1.06)}
  to{transform:rotate(360deg) scale(1.16)}
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--magenta);color:#150c12}

a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2px solid var(--magenta);
  outline-offset:3px;
}

/* ---------- 左侧固定导轨 ---------- */
.rail{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:var(--rail);
  z-index:60;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  padding:16px 0 20px;
  border-right:1px solid var(--line);
  background:rgba(20,11,17,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.brand-pin{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  min-height:44px;
  border:1px solid rgba(255,255,255,.34);
  background:linear-gradient(140deg,rgba(255,0,128,.5),rgba(255,0,255,.28));
  overflow:hidden;
}

.brand-pin img{width:100%;height:100%;object-fit:cover}

.brand-glyph{
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:1.4rem;
  font-weight:700;
  line-height:1;
  letter-spacing:.02em;
}

.burger{
  width:44px;
  height:44px;
  min-height:44px;
  display:grid;
  place-content:center;
  gap:6px;
  padding:0;
  border:1px solid var(--line);
  background:rgba(38,23,31,.5);
  color:var(--paper);
  cursor:pointer;
  transition:border-color .25s,background .25s;
}

.burger:hover{border-color:var(--magenta);background:rgba(255,0,255,.16)}
.burger-bar{display:block;width:18px;height:2px;background:currentColor;transition:transform .3s,opacity .3s}

.menu-open .burger-bar:first-child{transform:translateY(4px) rotate(45deg)}
.menu-open .burger-bar:last-child{transform:translateY(-4px) rotate(-45deg)}

/* ---------- 全屏遮罩菜单 ---------- */
.menu{
  position:fixed;
  inset:0;
  z-index:55;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:26px;
  padding:88px clamp(20px,7vw,90px) 60px;
  overflow-y:auto;
  background:rgba(16,9,14,.95);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  opacity:0;
  visibility:hidden;
  transform:translateY(-10px);
  transition:opacity .34s ease,transform .34s ease,visibility .34s;
}

.menu-open .menu{opacity:1;visibility:visible;transform:none}
.menu-open{overflow:hidden}

.menu-search{max-width:460px;width:100%}

.menu-search input{
  width:100%;
  min-height:44px;
  padding:10px 0;
  font:inherit;
  font-size:1rem;
  color:var(--paper);
  background:transparent;
  border:0;
  border-bottom:1px solid rgba(255,255,255,.3);
}

.menu-search input::placeholder{color:var(--dim)}
.menu-search input:focus{border-bottom-color:var(--magenta)}

.menu-list{
  list-style:none;
  margin:0;
  padding:0;
  max-width:760px;
  width:100%;
  counter-reset:m;
}

.menu-list li{
  counter-increment:m;
  border-bottom:1px solid rgba(255,255,255,.1);
}

.menu-list a{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:56px;
  padding:12px 0;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:clamp(1.35rem,3.6vw,2.15rem);
  font-weight:600;
  letter-spacing:.03em;
  transition:color .22s,transform .22s;
}

.menu-list a::before{
  content:counter(m,decimal-leading-zero);
  font-family:'Barlow Condensed',sans-serif;
  font-size:.9rem;
  letter-spacing:.16em;
  color:var(--pink);
  font-weight:500;
}

.menu-list a:hover{color:#fff;transform:translateX(6px)}

.menu-open .menu-list li{animation:slideIn .42s both}
.menu-open .menu-list li:nth-child(1){animation-delay:.04s}
.menu-open .menu-list li:nth-child(2){animation-delay:.08s}
.menu-open .menu-list li:nth-child(3){animation-delay:.12s}
.menu-open .menu-list li:nth-child(4){animation-delay:.16s}
.menu-open .menu-list li:nth-child(5){animation-delay:.2s}
.menu-open .menu-list li:nth-child(6){animation-delay:.24s}
.menu-open .menu-list li:nth-child(7){animation-delay:.28s}

@keyframes slideIn{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:none}
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  display:grid;
  grid-template-columns:1.02fr .98fr;
  align-items:center;
  gap:clamp(20px,4vw,56px);
  min-height:70vh;
  padding:clamp(56px,9vh,110px) var(--edge) clamp(40px,7vh,84px);
  overflow:hidden;
  border-bottom:1px solid var(--line);
}

.ghost{
  position:absolute;
  left:50%;
  top:46%;
  transform:translate(-50%,-50%);
  z-index:0;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-weight:700;
  font-size:clamp(3.6rem,17vw,15rem);
  line-height:.9;
  letter-spacing:.04em;
  white-space:nowrap;
  color:transparent;
  -webkit-text-stroke:1px rgba(255,255,255,.18);
  opacity:.85;
  pointer-events:none;
  user-select:none;
}

.hero-text{position:relative;z-index:1;text-align:center}

.hero-text h1{
  margin:0;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:clamp(2.1rem,5.6vw,4.3rem);
  font-weight:700;
  line-height:1.1;
  letter-spacing:.02em;
  background:linear-gradient(96deg,#ffffff,#ff8ecb 44%,#ff00ff 78%,#ff0080);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  text-shadow:0 0 60px rgba(255,0,128,.24);
}

.hero-media{
  position:relative;
  z-index:1;
  height:100%;
  min-height:clamp(220px,44vh,460px);
  border:1px solid var(--line);
  background:conic-gradient(from 210deg at 50% 50%,#ff0080,#7a0052,#ff00ff,#26171f,#ff0080);
  overflow:hidden;
}

.hero-media.is-empty{filter:saturate(1.1)}
.hero-media .hero-img{width:100%;height:100%;object-fit:cover}

/* ---------- 正文容器 ---------- */
.wrap{
  max-width:1140px;
  margin:0 auto;
  padding:0 var(--edge);
}

.doc{padding:clamp(34px,6vw,66px) 0 clamp(50px,8vw,96px)}

.prose{max-width:768px}

.prose-head{
  margin:0 0 clamp(28px,5vw,46px);
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
}

.prose-head h2{
  margin:0;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:clamp(1.7rem,4.4vw,2.7rem);
  font-weight:700;
  line-height:1.16;
  letter-spacing:.02em;
  background:linear-gradient(92deg,#ff6fb6,#ff00ff 62%,#ff0080);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.subtitle{
  margin:10px 0 0;
  color:var(--dim);
  font-size:1rem;
  line-height:1.7;
}

.prose{counter-reset:sec}

.prose > section{
  position:relative;
  counter-increment:sec;
  scroll-margin-top:34px;
  padding:clamp(32px,5.5vw,58px) 0;
  border-top:1px solid var(--line);
}

.prose > section:first-of-type{border-top:0;padding-top:0}

.prose > section::before{
  content:counter(sec,decimal-leading-zero);
  display:block;
  margin-bottom:12px;
  font-family:'Barlow Condensed',sans-serif;
  font-size:.95rem;
  font-weight:500;
  letter-spacing:.24em;
  color:var(--pink);
}

.prose > section::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:84px;
  height:2px;
  background:linear-gradient(90deg,var(--pink),var(--magenta));
  opacity:.7;
}

.prose h2{
  margin:0 0 14px;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:clamp(1.5rem,3.8vw,2.2rem);
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  background:linear-gradient(94deg,#ffb3d8,#ff00ff 70%,#ff0080);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.prose h2 + .subtitle,
.prose h2 + p{
  margin-top:0;
  color:var(--dim);
}

.prose h3{
  margin:26px 0 10px;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:clamp(1.15rem,2.6vw,1.4rem);
  font-weight:600;
  letter-spacing:.02em;
  color:#ffe0f0;
}

.prose p{
  margin:0 0 16px;
  color:#efdfea;
  line-height:1.78;
}

.prose strong{color:#fff;font-weight:600}
.prose em{color:#ffc2e2;font-style:normal}

.prose a{
  color:#ff7fc4;
  border-bottom:1px solid rgba(255,0,128,.55);
  transition:color .2s,border-color .2s;
}

.prose a:hover{color:#fff;border-bottom-color:#fff}

.prose ul,
.prose ol{
  margin:0 0 18px;
  padding-left:1.2em;
  color:#efdfea;
}

.prose li{margin-bottom:8px;line-height:1.7}
.prose ul{list-style:none;padding-left:0}

.prose ul li{
  position:relative;
  padding-left:20px;
}

.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.7em;
  width:10px;
  height:2px;
  background:var(--magenta);
}

.prose ol li::marker{color:var(--pink);font-family:'Barlow Condensed',sans-serif}

.prose blockquote{
  margin:22px 0;
  padding:16px 20px;
  border-left:3px solid var(--pink);
  background:rgba(255,0,128,.09);
  color:#ffe4f1;
}

.prose blockquote p:last-child{margin-bottom:0}

.prose table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0 24px;
  font-size:.98rem;
}

.prose th,
.prose td{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}

.prose th{color:#ffb8dd;font-weight:600}

.prose figure{margin:20px 0}
.prose figcaption{font-size:.9rem;color:var(--dim);margin-top:8px}

.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.92em;
  padding:2px 6px;
  background:rgba(255,255,255,.1);
}

/* ---------- 页脚 ---------- */
.foot{
  border-top:1px solid var(--line);
  background:rgba(16,9,14,.6);
  padding:clamp(36px,6vw,64px) var(--edge) 26px;
}

.cta{
  max-width:1140px;
  margin:0 auto clamp(34px,6vw,58px);
  padding:clamp(28px,5vw,52px) clamp(20px,4vw,40px);
  border:1px solid rgba(255,255,255,.16);
  background:linear-gradient(120deg,rgba(255,0,128,.24),rgba(255,0,255,.12) 55%,rgba(38,23,31,.2));
  text-align:center;
}

.cta-mark{
  margin:0 0 16px;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:clamp(1.8rem,6vw,3.4rem);
  font-weight:700;
  line-height:1.05;
  letter-spacing:.05em;
  background:linear-gradient(100deg,#fff,#ff00ff 65%,#ff0080);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.cta-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 30px;
  border:1px solid rgba(255,255,255,.5);
  font-size:1rem;
  font-weight:500;
  letter-spacing:.08em;
  transition:background .25s,border-color .25s,color .25s;
}

.cta-link:hover{background:var(--pink);border-color:var(--pink);color:#180d14}

.foot-grid{
  max-width:1140px;
  margin:0 auto;
  display:grid;
  grid-template-columns:.9fr 1.4fr;
  gap:clamp(24px,5vw,60px);
  padding-bottom:32px;
  border-bottom:1px solid var(--line);
}

.foot-name{
  margin:0 0 10px;
  font-family:'Barlow Condensed','PingFang SC',sans-serif;
  font-size:1.3rem;
  font-weight:600;
  letter-spacing:.06em;
}

.foot-desc{
  margin:0;
  color:var(--dim);
  font-size:.95rem;
  line-height:1.7;
  max-width:34ch;
}

.foot-cols{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:clamp(14px,3vw,32px);
}

.foot-cols dl{margin:0}

.foot-cols dt{
  margin-bottom:10px;
  font-family:'Barlow Condensed',sans-serif;
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--pink);
}

.foot-cols dd{margin:0}

.foot-cols a{
  display:inline-block;
  min-height:40px;
  padding:8px 0;
  font-size:.98rem;
  color:#e8d6e2;
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s;
}

.foot-cols a:hover{color:#fff;border-bottom-color:var(--magenta)}

.foot-base{
  max-width:1140px;
  margin:0 auto;
  padding-top:20px;
  text-align:center;
}

.foot-base p{
  margin:0;
  font-size:.88rem;
  letter-spacing:.1em;
  color:var(--dim);
}

/* ---------- 载入动效 ---------- */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  :root{--rail:60px}
  .hero{grid-template-columns:1fr;min-height:auto;padding-top:clamp(44px,10vh,80px);text-align:center}
  .hero-media{min-height:210px;order:2}
  .hero-text{order:1}
  .ghost{font-size:clamp(3rem,20vw,7rem);top:38%}
  .foot-grid{grid-template-columns:1fr}
  .foot-desc{max-width:100%}
}

@media (max-width:560px){
  :root{--rail:56px}
  body{font-size:16px}
  .menu{padding:84px 20px 40px;justify-content:flex-start;gap:18px}
  .menu-list a{min-height:52px;font-size:1.3rem}
  .prose{max-width:100%}
  .foot-cols{grid-template-columns:1fr 1fr;gap:8px 20px}
  .foot-cols dl:last-child{grid-column:1 / -1}
  .cta-link{width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  .js .reveal{opacity:1;transform:none;transition:none}
  .menu-open .menu-list li{animation:none}
  .menu{transition:none}
}

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