/* ===== 基础 ===== */
:root{
  --ink:#0d0d0d;
  --ink2:#141019;
  --pri:#8000ff;
  --acc:#ff00ff;
  --ok:#39ff88;
  --fg:#e8e3f4;
  --mut:#a49bbc;
  --line:rgba(128,0,255,.42);
  --line2:rgba(255,0,255,.34);
  --pad:clamp(14px,4vw,40px);
  --maxw:1160px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--fg);
  font-family:'Inter',-apple-system,'Segoe UI',system-ui,sans-serif;
  font-size:16px;
  line-height:1.7;
  letter-spacing:.005em;
  overflow-x:hidden;
  overflow-x:clip;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--acc)}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.22;letter-spacing:-.01em}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
hr{border:0;margin:0}
:focus-visible{outline:2px solid var(--ok);outline-offset:2px}
::selection{background:var(--acc);color:#0d0d0d}

/* 扫描线与霓虹氛围层 */
body::before{
  content:"";
  position:fixed;inset:0;z-index:60;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.045) 0 1px,rgba(0,0,0,0) 1px 3px);
  opacity:.55;
}
body::after{
  content:"";
  position:fixed;inset:0;z-index:59;pointer-events:none;
  background:
    radial-gradient(60% 55% at 12% 0%,rgba(128,0,255,.17),transparent 70%),
    radial-gradient(45% 45% at 92% 6%,rgba(255,0,255,.13),transparent 70%);
}

/* ===== 头部 HUD ===== */
.hud-head{
  position:relative;z-index:30;
  background:linear-gradient(180deg,#150c22 0%,#0d0d0d 100%);
  border-bottom:1px solid var(--line);
}
.hud-head::after{
  content:"";
  display:block;height:2px;
  background:linear-gradient(90deg,var(--pri),var(--acc) 45%,transparent 92%);
}
.topnav{
  display:flex;align-items:center;gap:10px;
  max-width:var(--maxw);margin:0 auto;
  padding:12px var(--pad);
}
.nav-l,.nav-r{
  display:flex;flex-wrap:wrap;gap:8px;
  flex:1 1 0;min-width:0;
}
.nav-r{justify-content:flex-end}
.brand{
  flex:0 0 auto;display:inline-flex;align-items:center;
  min-height:40px;padding:8px 6px;
  text-decoration:none;color:#fff;
  font-size:19px;font-weight:700;letter-spacing:.14em;
  text-shadow:0 0 12px rgba(255,0,255,.85),0 0 26px rgba(128,0,255,.6);
  animation:hit 8s infinite;
}
.pill{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:8px 13px;
  font-size:16px;letter-spacing:.03em;
  text-decoration:none;color:var(--fg);
  border:1px solid var(--line);
  background:rgba(128,0,255,.07);
  transition:color .18s,border-color .18s,box-shadow .18s,background .18s;
}
.pill:hover,.pill:focus-visible{
  color:#fff;border-color:var(--acc);
  box-shadow:0 0 0 1px var(--acc),0 0 20px rgba(255,0,255,.45);
  text-shadow:0 0 9px rgba(255,0,255,.9);
}
.nav-r li:last-child .pill{
  color:#fff;font-weight:600;border-color:transparent;
  background:linear-gradient(90deg,var(--pri),var(--acc));
  box-shadow:0 0 18px rgba(255,0,255,.42);
}
.nav-r li:last-child .pill:hover{box-shadow:0 0 0 1px #fff,0 0 26px rgba(255,0,255,.7)}

/* 粘性锚点条 */
.anchorbar{
  position:sticky;top:0;z-index:29;
  background:rgba(13,13,13,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line2);
  overflow-x:auto;
  scrollbar-width:none;
}
.anchorbar::-webkit-scrollbar{display:none}
.anchorbar ul{display:flex;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.anchorbar a{
  display:block;white-space:nowrap;
  min-height:40px;padding:9px 14px;line-height:22px;
  font-size:16px;color:var(--mut);text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .15s,border-color .15s;
}
.anchorbar a:hover,.anchorbar a:focus-visible,.anchorbar a.is-on{
  color:#fff;border-bottom-color:var(--acc);
  text-shadow:0 0 9px var(--acc);
}

/* ===== 主体骨架 ===== */
.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(20px,4vw,40px) var(--pad) clamp(40px,6vw,72px);
  display:grid;
  grid-template-columns:minmax(0,1fr) 272px;
  gap:clamp(22px,3.4vw,44px);
  align-items:start;
}
div section[id]{scroll-margin-top:110px}

/* Hero */
.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);
  gap:clamp(16px,3vw,30px);
  align-items:center;
  min-height:45vh;
  padding:clamp(14px,3vw,26px);
  margin-bottom:clamp(26px,4vw,48px);
  border:1px solid var(--line);
  border-bottom:3px solid var(--acc);
  background:
    radial-gradient(120% 120% at 0% 0%,rgba(128,0,255,.24),transparent 62%),
    var(--ink2);
  overflow:hidden;
}
.hero.no-media{grid-template-columns:minmax(0,1fr)}
.hero::before{
  content:"";
  position:absolute;left:0;right:0;bottom:3px;height:1px;
  background:linear-gradient(90deg,transparent,var(--acc),transparent);
}
.hero-media{
  position:relative;margin:0;overflow:hidden;
  aspect-ratio:1 / 1.15;
  border:1px solid var(--line2);
  box-shadow:inset 0 0 0 1px rgba(255,0,255,.16),0 0 30px rgba(128,0,255,.32);
}
.hero-media img{width:100%;height:100%;object-fit:cover;filter:saturate(1.12) contrast(1.06)}
.badge{
  position:absolute;left:0;bottom:0;max-width:calc(100% - 14px);
  padding:8px 10px;
  font-size:16px;line-height:1.4;font-weight:600;letter-spacing:.02em;
  color:#0d0d0d;background:var(--ok);
  box-shadow:0 0 20px rgba(57,255,136,.5);
}
.hero-copy{text-align:center}

/* 正文排版 */
.prose{min-width:0}
.prose h1{
  font-size:clamp(27px,4.4vw,44px);
  line-height:1.14;margin:0 0 .45em;
  text-shadow:0 0 16px rgba(128,0,255,.7),0 0 34px rgba(255,0,255,.32);
  animation:hit 9s infinite;
}
.lede{
  max-width:34em;margin:0 auto;
  font-size:16px;line-height:1.7;color:var(--mut);
}
.prose section{
  padding-bottom:1.4em;
  margin-bottom:2.2em;
  border-bottom:1px dashed rgba(128,0,255,.3);
  animation:up .5s both;
}
.prose section:nth-of-type(1){animation-delay:.04s}
.prose section:nth-of-type(2){animation-delay:.1s}
.prose section:nth-of-type(3){animation-delay:.16s}
.prose section:nth-of-type(4){animation-delay:.22s}
.prose section:nth-of-type(5){animation-delay:.28s}
.prose section:nth-of-type(6){animation-delay:.34s}
.prose section:nth-of-type(7){animation-delay:.4s}
.prose section:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:0}
.prose h2{
  position:relative;
  padding-left:15px;
  margin:2.1em 0 .5em;
  font-size:clamp(21px,2.7vw,29px);
  color:#fff;
  text-shadow:0 0 14px rgba(128,0,255,.72);
}
.prose h2::before{
  content:"";
  position:absolute;left:0;top:.3em;bottom:.12em;width:4px;
  background:linear-gradient(180deg,var(--acc),var(--pri));
  box-shadow:0 0 12px rgba(255,0,255,.7);
}
.prose h2 + hr{
  border-top:1px solid var(--line2);
  margin:.7em 0 1.3em;
  box-shadow:0 0 10px rgba(128,0,255,.45);
}
.prose h3{
  margin:1.8em 0 .4em;
  font-size:19px;color:var(--acc);
  text-shadow:0 0 10px rgba(255,0,255,.45);
}
.prose h3 + hr{border-top:1px solid var(--line);margin:.6em 0 1em}
.prose p{font-size:17px;line-height:1.8;color:#d9d3e8;margin:0 0 1.05em}
.prose strong{color:#fff}
.prose a{color:var(--acc);text-decoration:none;border-bottom:1px solid rgba(255,0,255,.5)}
.prose a:hover{text-shadow:0 0 9px var(--acc)}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.35em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li{font-size:17px;line-height:1.75;color:#d9d3e8;margin:.4em 0}
.prose blockquote{
  margin:1.3em 0;padding:.9em 1.1em;
  border-left:3px solid var(--acc);
  background:rgba(255,0,255,.07);
  color:#eae2f7;
}
.prose blockquote p:last-child{margin:0}

/* 侧栏 */
.side{
  position:sticky;top:72px;
  padding:16px 14px;
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(128,0,255,.14),rgba(13,13,13,.7));
}
.side-h{font-size:16px;letter-spacing:.18em;color:#fff}
.side hr{
  border-top:2px solid var(--acc);
  margin:10px 0 12px;
  box-shadow:0 0 12px rgba(255,0,255,.6);
}
.side-list{display:grid;gap:2px}
.side-list a{
  display:flex;align-items:center;
  min-height:40px;padding:4px 9px;
  font-size:16px;color:var(--mut);text-decoration:none;
  border-left:2px solid transparent;
  transition:color .15s,border-color .15s,background .15s;
}
.side-list a:hover,.side-list a:focus-visible,.side-list a.is-on{
  color:#fff;border-left-color:var(--acc);
  background:rgba(255,0,255,.1);
  text-shadow:0 0 8px var(--acc);
}

/* ===== 页脚 ===== */
.hud-foot{
  display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;
  gap:16px 28px;
  padding:20px var(--pad) 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#0d0d0d,#150c22);
}
.foot-brand,.foot-meta,.foot-copy{flex:0 0 auto}
.foot-brand .brand{font-size:17px;letter-spacing:.12em}
.foot-nav{flex:1 1 320px;min-width:0}
.foot-nav dl{display:flex;flex-wrap:wrap;align-items:center;gap:2px 6px;margin:0}
.foot-nav dt{font-size:16px;letter-spacing:.16em;color:var(--mut);margin-right:4px}
.foot-nav dd{margin:0}
.foot-nav a{
  display:inline-flex;align-items:center;
  min-height:40px;padding:2px 8px;
  font-size:16px;color:var(--fg);text-decoration:none;
  border:1px solid transparent;
  transition:color .15s,border-color .15s;
}
.foot-nav a:hover,.foot-nav a:focus-visible{
  color:#fff;border-color:var(--line2);
  text-shadow:0 0 8px var(--acc);
}
.sub{display:flex}
.sub input{
  width:150px;min-height:40px;padding:0 12px;
  font:inherit;font-size:16px;
  color:var(--fg);background:#080808;
  border:1px solid var(--line);border-right:0;
  border-radius:0;
}
.sub input::placeholder{color:var(--mut)}
.sub input:focus{outline:0;border-color:var(--acc);box-shadow:0 0 14px rgba(255,0,255,.4)}
.sub button{
  min-height:40px;padding:0 16px;
  font:inherit;font-size:16px;font-weight:600;cursor:pointer;
  color:#fff;border:0;border-radius:0;
  background:linear-gradient(90deg,var(--pri),var(--acc));
}
.sub button:hover{box-shadow:0 0 18px rgba(255,0,255,.6)}
.foot-copy p{margin:0;font-size:16px;line-height:40px;color:var(--mut)}

/* ===== 动效 ===== */
@keyframes up{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes hit{
  0%,90%,100%{transform:none}
  93%{transform:translate(-1px,1px) skewX(-1.4deg)}
  96%{transform:translate(1px,-1px) skewX(1.4deg)}
}

/* ===== 断点 ===== */
@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr)}
  .side{position:static;order:2}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0}
  .hero-media{aspect-ratio:16 / 10}
}
@media (max-width:820px){
  .topnav{flex-direction:column;align-items:stretch;gap:8px}
  .brand{align-self:center;order:-1;padding:6px 0}
  .nav-l,.nav-r{flex:0 0 auto;width:100%;justify-content:center;gap:6px}
  .nav-r li:last-child{width:100%}
  .nav-r li:last-child .pill{width:100%}
}
@media (max-width:700px){
  .hud-foot{flex-direction:column;align-items:stretch;gap:14px}
  .foot-copy p{line-height:1.6}
  .sub input{flex:1 1 auto;width:auto}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
}

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