@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root{
  --v:#8000ff;
  --p:#ff00ff;
  --k:#0d0d0d;
  --ink:#ece4fb;
  --dim:#a99cc6;
  --glass:rgba(255,255,255,.045);
  --glass-2:rgba(255,255,255,.07);
  --line:rgba(128,0,255,.38);
  --line-2:rgba(255,0,255,.42);
  --r:28px;
}

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

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

body{
  margin:0;
  overflow-x:hidden;
  background:
    radial-gradient(920px 520px at 84% -8%, rgba(255,0,255,.16), transparent 62%),
    radial-gradient(720px 460px at 2% 18%, rgba(128,0,255,.22), transparent 64%),
    var(--k);
  background-attachment:fixed;
  color:var(--ink);
  font-family:'DM Sans','Space Grotesk',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.72;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,0) 0 2px,rgba(255,255,255,.032) 2px 3px);
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ol,ul{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}

.shell{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 16px 40px;
}

/* ---------- 顶部细条 ---------- */
.strip{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:'Space Grotesk',ui-monospace,monospace;
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--dim);
  padding:9px 4px 7px;
  border-bottom:1px dashed rgba(255,255,255,.1);
}
.strip .dot{
  width:8px;height:8px;flex:0 0 8px;
  background:var(--p);
  box-shadow:0 0 10px var(--p);
  animation:pulse 2.4s ease-in-out infinite;
}
.strip .sep{color:var(--v);opacity:.9}

@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.35;transform:scale(.7)}
}

/* ---------- 头部 / 导航 ---------- */
.hud{
  position:sticky;
  top:0;
  z-index:30;
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 0;
  background:rgba(13,13,13,.9);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}

.mark{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:44px;
  height:44px;
  padding:0 10px;
  border:1px solid var(--line-2);
  border-radius:10px;
  background:linear-gradient(135deg,rgba(128,0,255,.32),rgba(255,0,255,.14));
  clip-path:polygon(0 0,100% 0,100% 72%,88% 100%,0 100%);
  box-shadow:0 0 16px rgba(255,0,255,.24);
}
.mark-t{
  font-family:'Space Grotesk',monospace;
  font-weight:700;
  font-size:19px;
  letter-spacing:.04em;
  color:#fff;
  text-shadow:0 0 10px var(--p);
}
.mark-pic{width:26px;height:26px;object-fit:contain}
.mark.small{min-width:38px;height:38px}

.rail{
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:thin;
}
.rail ol{
  display:flex;
  align-items:center;
  gap:6px;
  width:max-content;
  padding:2px;
}
.rail a{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:44px;
  padding:8px 13px;
  font-size:15px;
  white-space:nowrap;
  color:var(--ink);
  border:1px solid transparent;
  border-radius:9px;
  transition:border-color .2s ease,background .2s ease,transform .2s ease,color .2s ease;
}
.rail a i{
  font-family:'Space Grotesk',monospace;
  font-style:normal;
  font-size:11px;
  letter-spacing:.08em;
  color:var(--p);
  opacity:.85;
}
.rail a:hover,.rail a:focus-visible{
  border-color:var(--line-2);
  background:rgba(255,0,255,.1);
  color:#fff;
  transform:translateY(-2px);
}

/* ---------- 视觉区 ---------- */
.hero{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  align-items:center;
  gap:0;
  min-height:70vh;
  margin:18px 0 30px;
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--r);
  overflow:hidden;
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.hero::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:8px;
  background:linear-gradient(90deg,var(--v),var(--p) 45%,var(--v));
  box-shadow:0 0 22px rgba(255,0,255,.5);
}

.hero-visual{
  position:relative;
  align-self:stretch;
  min-height:100%;
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% 88%,0 100%);
  background:#111;
}
.hero-pic{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(118%) contrast(106%);
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(128,0,255,.34),rgba(255,0,255,.12) 55%,rgba(13,13,13,.7));
  mix-blend-mode:screen;
  pointer-events:none;
}
.void{
  width:100%;
  height:100%;
  min-height:320px;
  background:
    repeating-linear-gradient(0deg,rgba(128,0,255,.22) 0 1px,transparent 1px 42px),
    repeating-linear-gradient(90deg,rgba(255,0,255,.18) 0 1px,transparent 1px 42px),
    radial-gradient(circle at 50% 50%,rgba(255,0,255,.25),transparent 62%),
    #111;
}

.hero-txt{
  text-align:center;
  padding:44px 26px;
}
.hero-txt h1{
  margin:0 0 14px;
  font-family:'Space Grotesk',system-ui,sans-serif;
  font-size:clamp(2rem,4.6vw,3.3rem);
  line-height:1.16;
  letter-spacing:.01em;
  font-weight:700;
  color:#fff;
  text-shadow:0 0 18px rgba(255,0,255,.65),0 0 46px rgba(128,0,255,.55);
  animation:glitch 6.5s steps(1,end) infinite;
}
@keyframes glitch{
  0%,92%,100%{transform:none}
  93%{transform:skewX(-3deg) translateX(-3px)}
  95%{transform:skewX(2deg) translateX(3px)}
  97%{transform:skewX(-1.5deg)}
}
.lede{
  margin:0 auto 22px;
  max-width:38ch;
  color:var(--dim);
  font-size:16px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:12px 30px;
  font-family:'Space Grotesk',system-ui,sans-serif;
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
  color:#fff;
  border:1px solid var(--line-2);
  border-radius:14px;
  background:linear-gradient(135deg,rgba(128,0,255,.55),rgba(255,0,255,.38));
  box-shadow:0 0 18px rgba(255,0,255,.3),inset 0 0 16px rgba(255,255,255,.09);
  clip-path:polygon(0 0,100% 0,100% 74%,92% 100%,0 100%);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.btn:hover,.btn:focus-visible{
  transform:translateY(-2px) skewX(-1.5deg);
  box-shadow:0 0 26px rgba(255,0,255,.55),inset 0 0 20px rgba(255,255,255,.16);
  filter:brightness(1.12);
}
.btn.ghost{
  background:transparent;
  border-color:var(--line);
  box-shadow:none;
  color:var(--dim);
}

/* ---------- 主区 ---------- */
.deck{
  display:grid;
  grid-template-columns:minmax(0,1fr) 258px;
  gap:24px;
  align-items:start;
}

.core{min-width:0}
.core > article{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:26px 24px;
  margin-bottom:24px;
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  box-shadow:0 18px 46px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.06);
  scroll-margin-top:132px;
  position:relative;
}
.core > article::before{
  content:"";
  position:absolute;
  left:0;top:22px;bottom:22px;
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--v),var(--p));
  box-shadow:0 0 12px var(--p);
}

.core h2,.core h3{
  font-family:'Space Grotesk',system-ui,sans-serif;
  line-height:1.32;
  color:#fff;
  letter-spacing:.01em;
  margin:1.3em 0 .6em;
}
.core h2{
  font-size:clamp(1.28rem,2.4vw,1.62rem);
  text-shadow:0 0 14px rgba(128,0,255,.7);
}
.core h3{
  font-size:1.12rem;
  text-shadow:0 0 12px rgba(255,0,255,.42);
}
.core > article > h2:first-child,
.core > article > h3:first-child{margin-top:0}
.core h2 > span,.core h3 > span{
  border-bottom:1px solid var(--line-2);
  padding-bottom:2px;
}
.core p{color:#d9d0ec}
.core a{
  color:#f0c6ff;
  border-bottom:1px solid rgba(255,0,255,.45);
  transition:color .16s ease,border-color .16s ease;
}
.core a:hover{color:#fff;border-color:#fff}
.core ul,.core ol{margin:0 0 1em;padding-left:1.15em;list-style:disc}
.core ol{list-style:decimal}
.core li{margin:.3em 0}
.core strong{color:#fff}
.core blockquote{
  margin:1.2em 0;
  padding:12px 18px;
  border-left:3px solid var(--p);
  background:rgba(255,0,255,.07);
  border-radius:0 14px 14px 0;
  color:#e7dcff;
}
.core code{
  font-family:ui-monospace,'Space Grotesk',monospace;
  background:rgba(128,0,255,.22);
  padding:1px 6px;
  border-radius:6px;
  font-size:.94em;
}
.core article article{margin:14px 0}

/* ---------- 侧栏 ---------- */
.side{
  position:sticky;
  top:128px;
  background:var(--glass-2);
  border:1px solid var(--line-2);
  border-radius:22px;
  padding:18px 16px;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:0 16px 40px rgba(0,0,0,.5);
}
.side h2{
  margin:0 0 12px;
  font-family:'Space Grotesk',system-ui,sans-serif;
  font-size:14px;
  letter-spacing:.2em;
  color:#fff;
  text-shadow:0 0 12px var(--p);
}
.side h2 > span{
  display:inline-block;
  border-bottom:1px solid var(--line-2);
  padding-bottom:3px;
}
.side-list li + li{margin-top:4px}
.side-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  font-size:15px;
  color:var(--dim);
  border-radius:10px;
  border-left:2px solid transparent;
  transition:color .16s ease,background .16s ease,border-color .16s ease,padding-left .16s ease;
}
.side-list a:hover,.side-list a:focus-visible{
  color:#fff;
  background:rgba(128,0,255,.18);
  border-left-color:var(--p);
  padding-left:14px;
}
.side-foot{margin-top:14px;display:flex}
.side-foot .btn{width:100%;min-height:44px;font-size:14px;padding:10px 12px}

/* ---------- CTA ---------- */
.cta{
  margin:10px 0 26px;
  padding:34px 24px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  border:1px solid var(--line-2);
  border-radius:var(--r);
  background:
    linear-gradient(105deg,rgba(128,0,255,.34),rgba(255,0,255,.2) 60%,rgba(128,0,255,.1)),
    var(--glass);
  clip-path:polygon(0 0,100% 0,100% 100%,2.4% 100%);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:0 0 34px rgba(255,0,255,.18) inset;
}
.cta h2{
  margin:0;
  font-family:'Space Grotesk',system-ui,sans-serif;
  font-size:clamp(1.3rem,3vw,1.9rem);
  color:#fff;
  text-shadow:0 0 16px var(--p);
}
.cta h2 > span{border-bottom:2px solid var(--line-2);padding-bottom:2px}

/* ---------- 页脚 ---------- */
.foot{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px 18px;
  padding:20px 6px 10px;
  border-top:1px solid var(--line);
}
.f-brand{display:flex;align-items:center;gap:10px}
.f-name{
  font-family:'Space Grotesk',system-ui,sans-serif;
  font-weight:600;
  letter-spacing:.05em;
  color:#fff;
  text-shadow:0 0 12px rgba(128,0,255,.7);
}
.f-nav{
  flex:1 1 auto;
  display:flex;
  flex-wrap:wrap;
  gap:2px;
}
.f-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  font-size:14px;
  color:var(--dim);
  border-radius:8px;
  transition:color .16s ease,background .16s ease;
}
.f-nav a:hover,.f-nav a:focus-visible{color:#fff;background:rgba(255,0,255,.12)}
.f-meta{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:13px;
  color:#7f7398;
}
.f-meta a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  border:1px solid var(--line);
  border-radius:8px;
  color:var(--dim);
}
.f-meta a:hover,.f-meta a:focus-visible{color:#fff;border-color:var(--line-2)}

/* ---------- 焦点 ---------- */
a:focus-visible{outline:2px solid var(--p);outline-offset:2px}

/* ---------- 断点 ---------- */
@media (max-width:980px){
  .deck{grid-template-columns:minmax(0,1fr)}
  .side{position:static}
  .side-list{display:flex;flex-wrap:wrap;gap:6px}
  .side-list li+li{margin-top:0}
  .side-list a{border-left:0;border:1px solid var(--line);padding:6px 12px;min-height:42px}
  .side-list a:hover{padding-left:12px}
  .side-foot{display:none}
}

@media (max-width:760px){
  body{font-size:16px}
  .shell{padding:0 12px 32px}
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:0;
    margin:14px 0 22px;
  }
  .hero-visual{min-height:190px;height:190px;clip-path:polygon(0 0,100% 0,100% 100%,0 88%)}
  .void{min-height:190px}
  .hero-txt{padding:24px 18px 30px}
  .core > article{padding:20px 16px;border-radius:22px;scroll-margin-top:118px}
  .core > article::before{top:16px;bottom:16px}
  .cta{clip-path:none;border-radius:22px;padding:26px 18px}
  .foot{gap:10px}
  .f-nav{order:3;flex-basis:100%}
  .f-meta{order:2;margin-left:auto}
  .rail ol{gap:2px}
  .rail a{font-size:14px;padding:8px 10px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .hero-txt h1{animation:none}
}

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