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

*,*::before,*::after{box-sizing:border-box}
:root{
  --neon:#69ff69;
  --cyan:#00ffff;
  --ink:#172617;
  --deep:#0b160c;
  --chrome:linear-gradient(178deg,#f7fff8 0%,#c8dccd 33%,#ffffff 50%,#8aa48f 67%,#e8fff0 100%);
  --bubble:linear-gradient(135deg,#69ff69 0%,#c8ffd9 44%,#00ffff 100%);
  --r:18px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--ink);
  background-image:radial-gradient(rgba(105,255,105,.14) 1px,transparent 1px);
  background-size:24px 24px;
  color:#e3f6e5;
  font-family:Karla,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.7;
  overflow-x:hidden;
}
h1,h2,.mark,.foot-mark{font-family:"Playfair Display SC","Songti SC","STSong",Georgia,serif;font-weight:700;line-height:1.14}
a{color:inherit}
img{max-width:100%}
[id]{scroll-margin-top:122px}

.mark,.foot-mark,h1,.prose h2{
  background:var(--chrome);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 16px rgba(0,255,255,.42));
}

/* ---------- 顶部 dock ---------- */
.dock{
  position:sticky;top:0;z-index:80;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;
  padding:10px 20px;
  background:linear-gradient(180deg,rgba(23,38,23,.95),rgba(11,22,12,.88));
  backdrop-filter:blur(14px);
  box-shadow:inset 0 -1px 0 rgba(0,255,255,.35),0 16px 34px rgba(0,0,0,.5);
}
.dock-nav{min-width:0}
.dock-nav ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.dock-nav--left{justify-self:end}
.dock-nav--right{justify-self:start}
.dock-nav a{
  display:inline-flex;align-items:center;min-height:42px;padding:6px 12px;
  border-radius:999px;color:#d9f7dc;text-decoration:none;font-size:16px;white-space:nowrap;
  transition:background .2s,color .2s,text-shadow .2s;
}
.dock-nav a:hover,.dock-nav a:focus-visible{background:rgba(0,255,255,.2);color:#fff;text-shadow:0 0 12px rgba(0,255,255,.9)}
.dock-nav a[aria-current]{background:rgba(105,255,105,.22);color:#fff}
.drop{position:relative}
.drop>a::after{content:"◦";margin-left:6px;color:var(--cyan);font-size:14px}
.drop ul{
  position:absolute;top:100%;left:0;display:none;flex-direction:column;gap:2px;
  min-width:170px;padding:8px;border-radius:16px;
  background:rgba(9,20,10,.97);
  box-shadow:0 20px 38px rgba(0,0,0,.55),inset 0 0 0 1px rgba(0,255,255,.4);
}
.drop:hover ul,.drop:focus-within ul{display:flex}
.cta-item>a{
  background:var(--bubble);color:#0c1c0d;font-weight:700;padding:8px 18px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.8),0 8px 22px rgba(105,255,105,.35);
}
.cta-item>a:hover{filter:brightness(1.08);color:#0c1c0d;text-shadow:none}
.mark{font-size:24px;letter-spacing:.08em;text-decoration:none;padding:4px 10px;white-space:nowrap}

/* ---------- hero ---------- */
.hero{
  position:relative;display:flex;align-items:center;
  min-height:100vh;min-height:100svh;
  padding:88px 20px 64px;overflow:hidden;
  background:
    radial-gradient(circle at 82% 16%,rgba(0,255,255,.24),transparent 55%),
    radial-gradient(circle at 10% 84%,rgba(105,255,105,.2),transparent 58%),
    var(--ink);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(105,255,105,.22) 1px,transparent 1px);
  background-size:26px 26px;opacity:.75;
}
.hero::after{
  content:"";position:absolute;right:-10vw;top:12vh;
  width:44vw;height:44vw;max-width:460px;max-height:460px;border-radius:50%;
  background:conic-gradient(from 120deg,rgba(105,255,105,.6),rgba(0,255,255,.55),rgba(255,255,255,.4),rgba(105,255,105,.6));
  filter:blur(14px);opacity:.34;pointer-events:none;
}
.hero-fig{position:absolute;inset:0;margin:0;z-index:0;
  background:radial-gradient(circle at 72% 28%,rgba(0,255,255,.28),transparent 62%)}
.hero-fig img{width:100%;height:100%;object-fit:cover;opacity:.5;filter:contrast(1.12) saturate(1.05)}
.hero-fig::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,22,12,.96),rgba(11,22,12,.62) 52%,rgba(0,255,255,.16));
}
.hero-copy{position:relative;z-index:2;width:100%;max-width:1120px;margin:0 auto}
.hero h1{font-size:clamp(38px,7.6vw,80px);margin:0 0 .1em;letter-spacing:.01em}
.hero-brand{
  font-size:clamp(18px,2.6vw,27px);margin:.1em 0 .5em;
  letter-spacing:.24em;color:var(--cyan);
  background:none;-webkit-text-fill-color:currentColor;
  filter:drop-shadow(0 0 14px rgba(0,255,255,.75));
}
.subtitle{font-size:18px;line-height:1.75;color:#c9ebcd;max-width:46ch;margin:0}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 0}
.pill{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:11px 26px;border-radius:999px;
  background:var(--bubble);color:#0c1c0d;font-weight:700;font-size:17px;text-decoration:none;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.85),0 12px 28px rgba(105,255,105,.35);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.pill:hover,.pill:focus-visible{transform:translateY(-3px);box-shadow:inset 0 1px 0 #fff,0 16px 34px rgba(0,255,255,.45)}
.pill--ghost{background:transparent;color:var(--cyan);box-shadow:inset 0 0 0 1px rgba(0,255,255,.65)}
.pill--ghost:hover{background:rgba(0,255,255,.14);color:#fff}
.pill--wide{font-size:19px;padding:15px 40px}

/* ---------- 主体与目录 ---------- */
.stage{
  display:grid;grid-template-columns:minmax(0,1fr) 262px;
  gap:30px;align-items:start;
  max-width:1180px;margin:0 auto;padding:34px 20px 72px;
}
.prose{max-width:764px;min-width:0}
.prose>article{
  position:relative;
  background:#1e3520;border-radius:var(--r);
  padding:26px 24px 30px;margin:0 0 22px;
  box-shadow:0 14px 32px rgba(0,0,0,.32);
}
.prose>article:nth-of-type(even){background:#122f34}
.prose>article::before{
  content:"✦";position:absolute;top:14px;right:18px;
  font-size:15px;color:rgba(105,255,105,.85);text-shadow:0 0 12px rgba(105,255,105,.9);
}
.prose h2{font-size:clamp(24px,3.4vw,34px);margin:.1em 0 .3em;letter-spacing:.01em}
.prose h3{font-size:20px;color:var(--neon);margin:1.3em 0 .45em}
.prose p{margin:0 0 1em;color:#dcf0de}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(0,255,255,.45)}
.prose a:hover{border-bottom-color:var(--cyan);text-shadow:0 0 12px rgba(0,255,255,.7)}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1em;color:#dcf0de}
.prose li{margin:.4em 0}
.prose strong{color:#fff}
.prose blockquote{
  margin:1.1em 0;padding:14px 18px;border-radius:14px;
  background:linear-gradient(135deg,rgba(0,255,255,.14),rgba(105,255,105,.1));color:#eafff2;
}
.prose blockquote p:last-child{margin:0}
.prose figure{margin:1.1em 0}
.prose figure img{border-radius:14px;display:block}
.prose hr{border:0;height:1px;margin:1.4em 0;background:linear-gradient(90deg,transparent,rgba(105,255,105,.6),transparent)}
.prose table{width:100%;border-collapse:collapse;font-size:16px}
.prose th,.prose td{padding:8px 10px;text-align:left}
.prose th{color:var(--neon)}
.prose code{font-size:15px;background:rgba(0,0,0,.28);padding:1px 6px;border-radius:6px}

.rail{
  position:sticky;top:96px;
  padding:16px 14px;border-radius:var(--r);
  background:linear-gradient(180deg,rgba(0,255,255,.15),rgba(105,255,105,.08));
  box-shadow:inset 0 0 0 1px rgba(0,255,255,.22);
}
.rail-list{list-style:none;margin:0 0 12px;padding:0;counter-reset:rail}
.rail-list li{counter-increment:rail}
.rail-list a{
  display:flex;align-items:center;gap:9px;min-height:42px;padding:8px 10px;
  border-radius:12px;color:#d6f9da;text-decoration:none;font-size:16px;line-height:1.4;
  transition:background .2s,color .2s;
}
.rail-list a::before{
  content:counter(rail,decimal-leading-zero);
  font-size:12px;letter-spacing:.08em;color:var(--cyan);opacity:.9;
}
.rail-list a:hover,.rail-list a:focus-visible,.rail-list a[aria-current]{background:rgba(105,255,105,.22);color:#fff}
.topper{
  display:inline-flex;align-items:center;min-height:42px;padding:6px 16px;
  border-radius:999px;background:rgba(255,255,255,.12);color:#f0fff1;
  text-decoration:none;font-size:16px;
}
.topper:hover{background:rgba(0,255,255,.25)}

/* ---------- 页脚 ---------- */
footer{
  display:grid;grid-template-columns:1fr auto auto;gap:22px 28px;align-items:center;
  padding:46px 22px 28px;
  background:linear-gradient(180deg,rgba(0,255,255,.16),rgba(11,22,12,.96));
  border-radius:26px 26px 0 0;
  box-shadow:inset 0 1px 0 rgba(105,255,105,.35);
}
.foot-cta{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.foot-mark{font-size:23px;letter-spacing:.06em;text-decoration:none}
.foot-nav ul{display:flex;flex-wrap:wrap;gap:2px 4px;list-style:none;margin:0;padding:0}
.foot-nav a{
  display:inline-flex;align-items:center;min-height:42px;padding:6px 11px;
  border-radius:999px;color:#cfe9d4;text-decoration:none;font-size:16px;white-space:nowrap;
}
.foot-nav a:hover{background:rgba(105,255,105,.2);color:#fff}
.foot-legal p{margin:0;font-size:16px;color:#a2c0a5;white-space:nowrap}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s ease;transition-delay:calc(var(--i,0) * 55ms)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .stage{grid-template-columns:minmax(0,1fr);padding-bottom:56px}
  .rail{position:static;order:2}
  .rail-list{display:flex;flex-wrap:wrap;gap:2px}
  .rail-list a{min-height:40px}
  .prose{max-width:none}
}
@media (max-width:900px){
  .dock{display:flex;flex-wrap:wrap;justify-content:center;padding:8px 12px;gap:4px}
  .mark{order:-1;flex:1 0 100%;text-align:center;font-size:21px}
  .dock-nav{flex:1 0 100%;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .dock-nav::-webkit-scrollbar{display:none}
  .dock-nav ul{justify-content:flex-start}
  .drop ul{position:static;display:flex;flex-direction:row;padding:0;background:none;box-shadow:none;min-width:0;gap:4px}
  .hero{padding-top:56px;align-items:flex-start;padding-bottom:48px}
  .hero h1{margin-top:14vh}
  footer{grid-template-columns:1fr;gap:14px;padding:36px 18px 26px}
  .foot-cta{grid-column:auto}
}
@media (max-width:520px){
  body{font-size:16px}
  .prose>article{padding:22px 17px 24px}
  .hero h1{font-size:clamp(32px,10vw,46px)}
  .pill{min-height:46px;padding:10px 20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}

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