@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Syncopate:wght@400;700&display=swap');

:root{
  --ink:#1c1726;
  --ink-2:#241d33;
  --violet:#6514ff;
  --pink:#bf00ff;
  --paper:#efe9ff;
  --line:rgba(191,0,255,.30);
  --line-soft:rgba(191,0,255,.14);
  --rail:236px;
  --mono:'Space Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --disp:'Syncopate','Space Mono',ui-sans-serif,system-ui,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --body:'Space Mono',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  background-color:var(--ink);
  color:var(--paper);
  font-family:var(--body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.012em;
  overflow-x:clip;
  min-height:100vh;
}

body::before{
  content:'';
  position:fixed;
  inset:-35%;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 20% 14%, rgba(101,20,255,.50), transparent 46%),
    radial-gradient(circle at 86% 72%, rgba(191,0,255,.34), transparent 44%),
    repeating-linear-gradient(48deg, rgba(191,0,255,.07) 0 2px, transparent 2px 24px);
  animation:drift 34s linear infinite;
}

@keyframes drift{
  from{transform:translate3d(0,0,0)}
  to{transform:translate3d(-184px,-184px,0)}
}

a{color:inherit}

a:focus-visible,
summary:focus-visible{
  outline:3px solid var(--pink);
  outline-offset:3px;
  border-radius:8px;
}

/* ---------- 左侧固定竖排导航 ---------- */
.rail{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:var(--rail);
  z-index:40;
  display:flex;
  flex-direction:column;
  gap:26px;
  padding:30px 20px 26px;
  background:linear-gradient(180deg,rgba(28,23,38,.97),rgba(28,23,38,.88));
  border-right:2px solid var(--line);
  backdrop-filter:blur(6px);
}

.brand{
  display:flex;
  align-items:center;
  min-height:48px;
  color:#fff;
  text-decoration:none;
  font-family:var(--disp);
  font-size:16px;
  font-weight:700;
  letter-spacing:.14em;
  line-height:1.4;
}

.brand span{
  border-left:9px solid var(--pink);
  padding-left:11px;
  transition:border-color .22s ease,transform .22s ease;
}

.brand:hover span{border-color:var(--violet);transform:translateX(2px)}

.nav{counter-reset:n;min-width:0}

.nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:6px;
}

.nav li{counter-increment:n}

.nav a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:9px 12px;
  color:#d6cbf7;
  text-decoration:none;
  font-size:16px;
  line-height:1.4;
  border:1px solid transparent;
  border-radius:14px;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}

.nav a span{display:block}

.nav a::before{
  content:counter(n,decimal-leading-zero);
  font-family:var(--mono);
  font-size:12px;
  color:var(--pink);
  flex:0 0 auto;
  transition:color .22s ease;
}

.nav a:hover,
.nav a:focus-visible{
  background:var(--violet);
  color:#fff;
  border-color:var(--pink);
  transform:translateX(3px);
}

.nav a:hover::before{color:#fff}

.more{margin-top:4px}

.more summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  min-height:42px;
  padding:10px 12px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.24em;
  color:var(--pink);
  border-top:1px dashed var(--line);
}

.more summary::-webkit-details-marker{display:none}

.nav .more-list{display:none;margin-top:6px}

.more[open] .more-list,
.more:hover .more-list,
.more:focus-within .more-list{display:grid}

.rail-cta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:52px;
  padding:10px 14px;
  border-radius:28px;
  border:2px solid var(--pink);
  background:linear-gradient(118deg,var(--violet),var(--pink));
  color:#fff;
  text-decoration:none;
  font-weight:700;
  letter-spacing:.09em;
  transition:filter .22s ease,transform .22s ease;
}

.rail-cta:hover{filter:brightness(1.2);transform:translateY(-2px)}

/* ---------- 主区 ---------- */
main{
  position:relative;
  z-index:1;
  margin-left:var(--rail);
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:56px;
  align-items:start;
  grid-auto-rows:min-content;
  padding-bottom:88px;
}

/* ---------- 满屏大图 hero ---------- */
.hero{
  grid-column:1 / -1;
  position:relative;
  overflow:hidden;
  isolation:isolate;
  min-height:100vh;
  min-height:100svh;
  display:flex;
  align-items:flex-end;
  justify-content:flex-end;
  padding:0 clamp(20px,4vw,64px) clamp(58px,10vh,120px);
  border-bottom:2px solid var(--line);
}

.hero-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 32%;
  z-index:-2;
  transform:scale(1.35);
  will-change:transform;
}

.hero-veil{
  position:absolute;
  inset:0;
  z-index:-1;
  display:block;
  background:
    linear-gradient(200deg,rgba(28,23,38,.12) 0%,rgba(28,23,38,.58) 48%,rgba(28,23,38,.96) 94%),
    linear-gradient(58deg,rgba(101,20,255,.55),rgba(191,0,255,.26) 62%,transparent);
}

.hero-bare{
  background:conic-gradient(from 210deg at 76% 28%,var(--violet),var(--pink),#2b1f45,var(--violet));
}

.hero-txt{
  position:relative;
  text-align:right;
  max-width:min(100%,19em);
}

.hero-h1{
  margin:0;
  font-family:var(--disp);
  font-weight:700;
  font-size:clamp(38px,7vw,104px);
  line-height:1.03;
  letter-spacing:-.012em;
  color:#fff;
  word-break:break-word;
  text-shadow:0 8px 42px rgba(0,0,0,.5);
}

.hero-h1 span{display:inline-block}

@supports (-webkit-background-clip:text){
  .hero-h1 span{
    background:linear-gradient(100deg,#ffffff 0%,#ecdcff 40%,#d18cff 74%,#bf00ff 100%);
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
    color:transparent;
    text-shadow:none;
    filter:drop-shadow(0 8px 26px rgba(0,0,0,.55));
  }
}

.hero-desc{
  display:inline-block;
  margin:22px 0 0;
  padding-right:14px;
  border-right:6px solid var(--pink);
  font-size:17px;
  line-height:1.65;
  color:#ded3f7;
}

/* ---------- 正文 ---------- */
.post{
  display:grid;
  gap:56px;
  min-width:0;
  max-width:860px;
  padding-left:clamp(20px,4vw,64px);
}

.post > div{
  scroll-margin-top:104px;
  padding:clamp(22px,3vw,42px);
  border:2px solid var(--line);
  border-radius:28px;
  background:linear-gradient(158deg,rgba(43,31,69,.60),rgba(28,23,38,.76));
  transition:border-color .25s ease,background .25s ease;
}

.post > div:hover{border-color:var(--pink)}

.post h2{
  position:relative;
  isolation:isolate;
  margin:0 0 18px;
  font-size:clamp(24px,3vw,34px);
  line-height:1.26;
  font-weight:700;
  color:#fff;
  letter-spacing:.008em;
}

.post h2 span{position:relative;display:inline}

.post h2 span::after{
  content:'';
  position:absolute;
  left:-3px;
  right:-3px;
  bottom:.05em;
  height:.42em;
  z-index:-1;
  border-radius:3px;
  background:linear-gradient(90deg,rgba(101,20,255,.85),rgba(191,0,255,.50));
}

.post h3{
  position:relative;
  isolation:isolate;
  margin:1.5em 0 .7em;
  padding-left:14px;
  font-size:clamp(19px,2.2vw,23px);
  line-height:1.35;
  color:#fff;
  border-left:6px solid var(--pink);
}

.post h3 span{display:inline}

.post p{margin:0 0 1.05em;font-size:17px;line-height:1.8;color:#e7def9}

.post p:last-child{margin-bottom:0}

.post a{
  color:#daaaff;
  text-decoration:underline;
  text-decoration-color:var(--pink);
  text-decoration-thickness:2px;
  text-underline-offset:3px;
  word-break:break-word;
  transition:color .2s ease,background .2s ease;
}

.post a:hover{color:#fff;background:rgba(101,20,255,.55)}

.post strong{color:#fff}

.post ul,
.post ol{padding-left:1.35em;margin:0 0 1.15em}

.post li{margin:.35em 0;line-height:1.75}

.post blockquote{
  margin:0 0 1.15em;
  padding:14px 20px;
  border-left:6px solid var(--pink);
  border-radius:0 20px 20px 0;
  background:rgba(101,20,255,.16);
}

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

.post img{
  display:block;
  max-width:100%;
  height:auto;
  margin:10px 0 1.2em;
  border:2px solid var(--line);
  border-radius:28px;
}

.post table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  margin-bottom:1.2em;
  font-size:16px;
}

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

.post th{background:rgba(191,0,255,.18);color:#fff}

/* ---------- 右侧栏 ---------- */
.side{
  position:sticky;
  top:32px;
  align-self:start;
  display:grid;
  gap:16px;
  padding-right:clamp(16px,3vw,48px);
}

.side-h{
  margin:0;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.34em;
  color:var(--pink);
}

.side-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
  border-top:1px solid var(--line);
}

.side-list li{border-bottom:1px solid var(--line-soft)}

.side-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:6px 2px;
  font-size:16px;
  line-height:1.45;
  color:#cfc2ee;
  text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}

.side-list a:hover{color:#fff;padding-left:9px;box-shadow:inset 3px 0 0 var(--pink)}

.side-top{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  justify-self:start;
  min-height:44px;
  padding:8px 16px;
  border:2px solid var(--line);
  border-radius:28px;
  color:#e7def9;
  text-decoration:none;
  font-size:16px;
  transition:background .22s ease,color .22s ease,border-color .22s ease;
}

.side-top:hover{background:var(--pink);border-color:#fff;color:#fff}

/* ---------- 极简页脚 ---------- */
.foot{
  position:relative;
  z-index:1;
  margin-left:var(--rail);
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:14px;
  padding:26px clamp(20px,4vw,64px) 74px;
  border-top:2px solid var(--line);
  font-family:var(--mono);
}

.foot p{margin:0;font-size:16px;line-height:1.6;color:#b6a6dc;letter-spacing:.04em}

.foot small{font-size:16px}

.foot small a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:6px 18px;
  border:2px solid var(--line);
  border-radius:28px;
  color:#e7def9;
  text-decoration:none;
  transition:background .22s ease,border-color .22s ease,color .22s ease;
}

.foot small a:hover{background:var(--violet);border-color:var(--pink);color:#fff}

/* ---------- 滚动渐入 ---------- */
.stagger{opacity:0;transform:translateY(20px);transition:opacity .28s ease,transform .28s ease}

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

/* ---------- 窄屏 ---------- */
@media (max-width:900px){
  .rail{
    position:sticky;
    top:0;
    bottom:auto;
    left:auto;
    width:auto;
    height:auto;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:10px 14px;
    border-right:0;
    border-bottom:2px solid var(--line);
    overflow:hidden;
  }

  .brand{flex:0 0 auto;min-height:40px;font-size:15px;letter-spacing:.1em}

  .nav{
    flex:1 1 auto;
    display:flex;
    align-items:center;
    gap:8px;
    overflow-x:auto;
    scrollbar-width:none;
  }

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

  .nav ul{display:flex !important;gap:8px}

  .nav a{
    min-height:44px;
    padding:8px 14px;
    white-space:nowrap;
    border:1px solid var(--line);
    border-radius:22px;
  }

  .nav a::before{display:none}
  .nav a:hover{transform:none}

  .more{margin:0;flex:0 0 auto}
  .more summary{display:none;border:0;padding:0}
  .nav .more-list{margin:0}

  .rail-cta{margin:0;flex:0 0 auto;min-height:44px;padding:8px 16px;font-size:16px}

  main{margin-left:0;display:block;padding-bottom:56px}

  .hero{min-height:80vh;min-height:80svh;padding-bottom:46px}

  .hero-h1{font-size:clamp(34px,8.4vw,52px)}

  .post{max-width:none;padding:0 16px;gap:48px}

  .post > div{scroll-margin-top:132px;padding:22px 18px}

  .side{position:static;padding:34px 16px 0}

  .foot{margin-left:0;padding:22px 16px 56px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before{animation:none}
  .stagger{opacity:1;transform:none;transition:none}
  .hero-img{transform:none}
}

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