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

*,*::before,*::after{box-sizing:border-box;border-radius:0}

:root{
  --neon:#87ff71;
  --cyan:#01cdfe;
  --ink:#192617;
  --pink:#ff6ec7;
  --violet:#b967ff;
  --bg:#0a1009;
  --bg2:#101a10;
  --fg:#dcf6d6;
  --dim:#8fbb95;
  --line:rgba(1,205,254,.3);
  --line2:rgba(135,255,113,.3);
  --font:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.78;
  color:var(--fg);
  background:
    radial-gradient(1100px 560px at 84% -12%,rgba(255,110,199,.20),transparent 62%),
    radial-gradient(880px 520px at -6% 8%,rgba(1,205,254,.17),transparent 62%),
    linear-gradient(180deg,#0a1009 0%,#12200f 52%,#0a1009 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:9;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.035) 0 1px,transparent 1px 3px);
  opacity:.6;
}

::selection{background:var(--neon);color:var(--ink)}

a{color:var(--cyan)}
a:hover{color:var(--neon)}

/* 顶栏 */
.topbar{
  position:relative;
  z-index:30;
  border-bottom:1px solid var(--line);
  background:rgba(9,15,9,.88);
  -webkit-backdrop-filter:blur(9px);
  backdrop-filter:blur(9px);
}

.bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6rem;
  max-width:1180px;
  margin:0 auto;
  padding:.55rem 1rem;
}

.menu{order:1;position:relative}
.menu summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  min-height:44px;
  padding:.5rem .95rem;
  border:1px solid var(--line2);
  color:var(--neon);
  font-size:.92rem;
  letter-spacing:.18em;
  background:rgba(135,255,113,.05);
  transition:background .2s ease,color .2s ease;
}
.menu summary::-webkit-details-marker{display:none}
.menu summary:hover,.menu[open] summary{background:rgba(135,255,113,.16);color:#eafff0}

.dropdown{
  position:absolute;
  top:calc(100% + .45rem);
  left:0;
  z-index:40;
  min-width:216px;
  margin:0;
  padding:.4rem;
  list-style:none;
  border:1px solid var(--line);
  background:#0d170d;
  box-shadow:0 0 0 1px rgba(0,0,0,.5);
}
.dropdown li{margin:0}
.dropdown a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:.5rem .7rem;
  color:var(--fg);
  text-decoration:none;
  font-size:.95rem;
  border-left:2px solid transparent;
}
.dropdown a:hover{background:rgba(1,205,254,.12);color:var(--neon);border-left-color:var(--neon)}

.brand{
  order:2;
  margin:0 auto;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  min-height:44px;
  padding:.3rem .2rem;
  color:var(--neon);
  text-decoration:none;
  font-weight:600;
  letter-spacing:.22em;
  font-size:1.02rem;
  text-shadow:0 0 8px rgba(135,255,113,.5);
}
.brand:hover{color:#eafff0}
.logo{display:block;width:34px;height:34px;object-fit:contain;border:1px solid var(--line2);padding:2px}

.search{
  order:3;
  display:flex;
  flex:0 1 176px;
  gap:.35rem;
  margin:0;
}
.search input{
  flex:1 1 auto;
  min-width:0;
  min-height:42px;
  padding:.4rem .6rem;
  font-family:inherit;
  font-size:.9rem;
  color:var(--fg);
  background:rgba(0,0,0,.42);
  border:1px solid var(--line);
}
.search input::placeholder{color:#6f9678}
.search button{
  min-height:42px;
  padding:.4rem .7rem;
  font-family:inherit;
  font-size:.9rem;
  color:var(--neon);
  background:transparent;
  border:1px solid var(--line2);
  cursor:pointer;
}
.search button:hover{background:rgba(135,255,113,.16)}

/* 二级粘性锚点条 */
.chips{
  position:sticky;
  top:0;
  z-index:25;
  border-bottom:1px solid var(--line);
  background:rgba(9,15,9,.93);
  -webkit-backdrop-filter:blur(7px);
  backdrop-filter:blur(7px);
}
.chips menu{
  display:flex;
  gap:.1rem;
  max-width:1180px;
  margin:0 auto;
  padding:.3rem .8rem;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:none;
}
.chips menu::-webkit-scrollbar{display:none}
.chips li{flex:0 0 auto}
.chips a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:.4rem .68rem;
  color:var(--dim);
  text-decoration:none;
  font-size:.88rem;
  letter-spacing:.05em;
  border-bottom:2px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.chips a:hover,.chips a.is-on{color:var(--neon);border-bottom-color:var(--neon)}

/* 首屏 */
.hero{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  min-height:70vh;
  padding:4.5rem 1.2rem 5.5rem;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(1,205,254,.38) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(180deg,#000 10%,transparent 88%);
  mask-image:linear-gradient(180deg,#000 10%,transparent 88%);
  opacity:.5;
}
.hero::after{
  content:"";
  position:absolute;
  left:-10%;
  right:-10%;
  bottom:-2px;
  height:40%;
  pointer-events:none;
  background:
    repeating-linear-gradient(90deg,rgba(135,255,113,.42) 0 1px,transparent 1px 46px),
    repeating-linear-gradient(0deg,rgba(1,205,254,.34) 0 1px,transparent 1px 26px);
  transform:perspective(340px) rotateX(66deg);
  transform-origin:bottom;
  opacity:.55;
}
.hero-inner{position:relative;z-index:2;width:100%;max-width:1180px;margin:0 auto;text-align:right}
.hero h1{
  margin:0;
  font-size:clamp(2.4rem,8.4vw,6.2rem);
  line-height:1.03;
  font-weight:600;
  letter-spacing:-.02em;
  color:#eafff0;
  word-break:break-word;
  text-shadow:
    0 0 7px rgba(135,255,113,.55),
    0 0 28px rgba(1,205,254,.5),
    5px 4px 0 rgba(255,110,199,.34);
}

/* 主体 */
.wrap{
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:2rem;
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:2.4rem 1.1rem 3.2rem;
}

.rail{
  position:sticky;
  top:62px;
  padding:1rem .9rem;
  border:1px solid var(--line);
  background:rgba(13,22,13,.72);
}
.rail-title{
  margin:0 0 .3rem;
  font-size:1rem;
  letter-spacing:.16em;
  color:var(--neon);
  text-shadow:0 0 10px rgba(135,255,113,.45);
}
.subtitle{
  margin:0 0 .9rem;
  font-size:.85rem;
  line-height:1.6;
  color:var(--dim);
}
.rail-list{margin:0;padding:0;list-style:none;display:grid;gap:.1rem}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.35rem .45rem;
  color:var(--dim);
  text-decoration:none;
  font-size:.9rem;
  border-left:2px solid transparent;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.rail-list a:hover{color:var(--neon);border-left-color:var(--neon);background:rgba(1,205,254,.09)}

.content{min-width:0}

article{font-size:1.0625rem;line-height:1.88}
article div{
  margin:0 0 1.6rem;
  padding:1.5rem 1.35rem;
  border:1px solid var(--line2);
  background:rgba(255,255,255,.022);
  scroll-margin-top:100px;
}
article div:last-child{margin-bottom:0}
article p{margin:0 0 1.05rem}
article p:last-child{margin-bottom:0}
article h2{
  margin:.1rem 0 .7rem;
  padding-left:.7rem;
  font-size:clamp(1.25rem,3vw,1.62rem);
  line-height:1.35;
  font-weight:600;
  color:#eafff0;
  letter-spacing:.02em;
  border-left:3px solid var(--neon);
  text-shadow:0 0 12px rgba(1,205,254,.4);
}
article h3{
  margin:1.2rem 0 .5rem;
  font-size:1.1rem;
  font-weight:600;
  color:var(--cyan);
  letter-spacing:.03em;
}
article h2 + p{color:#c3ecca}
article ul,article ol{padding-left:1.25rem;margin:0 0 1.05rem}
article li{margin:.35rem 0}
article li::marker{color:var(--neon)}
article strong{color:var(--neon);font-weight:500}
article img{max-width:100%;height:auto;border:1px solid var(--line);display:block;margin:0 0 1rem}
article a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
article a:hover{color:var(--neon)}
article blockquote{
  margin:0 0 1.05rem;
  padding:.7rem 1rem;
  border-left:3px solid var(--pink);
  background:rgba(255,110,199,.08);
  color:#f0ffe9;
}
article code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;
  padding:.1em .35em;
  border:1px solid var(--line);
  background:rgba(1,205,254,.1);
}
article time{font-size:.9em;color:var(--dim);letter-spacing:.04em}

@media (prefers-reduced-motion:no-preference){
  article div{animation:rise .5s ease both}
  article div:nth-child(2){animation-delay:.07s}
  article div:nth-child(3){animation-delay:.14s}
  article div:nth-child(4){animation-delay:.21s}
  article div:nth-child(5){animation-delay:.28s}
  article div:nth-child(6){animation-delay:.35s}
  article div:nth-child(7){animation-delay:.42s}
  article div:hover{border-color:rgba(135,255,113,.6)}
  .hero h1{animation:glitch 8s steps(1) infinite}
}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes glitch{
  0%,100%{text-shadow:0 0 7px rgba(135,255,113,.55),0 0 28px rgba(1,205,254,.5),5px 4px 0 rgba(255,110,199,.34)}
  48%{text-shadow:0 0 7px rgba(135,255,113,.55),0 0 28px rgba(1,205,254,.5),5px 4px 0 rgba(255,110,199,.34)}
  50%{text-shadow:-3px 0 0 rgba(255,110,199,.7),3px 0 0 rgba(1,205,254,.7),0 0 24px rgba(135,255,113,.5)}
  53%{text-shadow:2px 2px 0 rgba(255,110,199,.6),-2px -2px 0 rgba(1,205,254,.6),0 0 24px rgba(135,255,113,.5)}
}

/* 页脚 */
.foot{
  margin-top:1.6rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(1,205,254,.08),rgba(255,110,199,.07));
}
.foot-top{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:2rem;
  max-width:1180px;
  margin:0 auto;
  padding:2.2rem 1.1rem 1.5rem;
}
.foot-addr{
  font-style:normal;
  display:block;
  margin-bottom:1rem;
  font-size:1.05rem;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--neon);
  text-shadow:0 0 10px rgba(135,255,113,.45);
}
.sub{display:flex;gap:.4rem;margin:0;max-width:360px}
.sub input{
  flex:1 1 auto;
  min-width:0;
  min-height:46px;
  padding:.55rem .7rem;
  font-family:inherit;
  font-size:.92rem;
  color:var(--fg);
  background:rgba(0,0,0,.42);
  border:1px solid var(--line);
}
.sub input::placeholder{color:#6f9678}
.sub button{
  min-height:46px;
  padding:.55rem 1rem;
  font-family:inherit;
  font-size:.92rem;
  letter-spacing:.12em;
  color:var(--neon);
  background:transparent;
  border:1px solid var(--neon);
  cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.sub button:hover{background:var(--neon);color:var(--ink)}

.foot-links ul{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:.15rem;
}
.foot-links a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:.35rem .2rem;
  color:var(--dim);
  text-decoration:none;
  font-size:.92rem;
  border-bottom:1px dashed transparent;
}
.foot-links a:hover{color:var(--neon);border-bottom-color:var(--line2)}

.foot-bottom{
  border-top:1px solid var(--line);
  padding:1rem 1.1rem;
  text-align:center;
  font-size:.85rem;
  letter-spacing:.16em;
  color:var(--dim);
}

/* 响应式 */
@media (max-width:900px){
  .wrap{grid-template-columns:1fr;gap:1.4rem;padding-top:1.8rem}
  .rail{position:static}
  .rail-list{grid-template-columns:1fr 1fr}
  .hero{min-height:62vh;padding:3.4rem 1.1rem 4.2rem}
}

@media (max-width:640px){
  body{font-size:16px}
  .bar{padding:.5rem .8rem}
  .search{order:4;flex:1 1 100%}
  .brand{font-size:.95rem;letter-spacing:.14em}
  .chips menu{padding:.25rem .5rem}
  article div{padding:1.15rem 1rem}
  .foot-top{grid-template-columns:1fr;gap:1.4rem;padding:1.8rem .9rem 1.2rem}
  .wrap{padding:1.6rem .9rem 2.2rem}
  .hero{padding:3rem .9rem 3.6rem;justify-content:flex-end}
  .hero-inner{text-align:right}
}

@media (max-width:420px){
  .rail-list{grid-template-columns:1fr}
  .hero h1{font-size:clamp(2rem,10vw,3rem)}
}

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