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

:root{
  --ink:#001e3c;
  --deep:#00121f;
  --mint:#99ffcc;
  --neon:#00ff41;
  --line:rgba(153,255,204,.2);
  --line-soft:rgba(153,255,204,.1);
  --text:#dcf7ec;
  --muted:#8bb2a9;
  --sans:'Exo',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'Roboto Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:hidden}
body{
  margin:0;font-family:var(--sans);font-size:17px;line-height:1.75;color:var(--text);
  overflow-x:hidden;
  background:
    radial-gradient(880px 620px at 86% -12%,rgba(0,255,65,.16),transparent 62%),
    radial-gradient(760px 540px at 2% 14%,rgba(153,255,204,.13),transparent 64%),
    var(--deep);
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(153,255,204,.17) 1px,transparent 1px);
  background-size:28px 28px;
  -webkit-mask-image:radial-gradient(circle at 50% 32%,#000,transparent 78%);
  mask-image:radial-gradient(circle at 50% 32%,#000,transparent 78%);
}
body.locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--mint)}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px}
.shell{position:relative;z-index:1}

.skip{
  position:absolute;left:14px;top:-72px;z-index:400;padding:12px 18px;
  background:var(--mint);color:#002a12;text-decoration:none;
  font-family:var(--mono);font-size:14px;transition:top .22s var(--ease);
}
.skip:focus{top:14px}

/* ---------- 顶部两行 ---------- */
.masthead{
  position:sticky;top:0;z-index:60;
  background:rgba(0,18,31,.88);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.brand-row{
  max-width:var(--max);margin:0 auto;padding:13px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{
  display:inline-flex;align-items:center;gap:12px;min-height:44px;
  color:var(--mint);text-decoration:none;font-weight:600;
  letter-spacing:.05em;font-size:clamp(18px,3.4vw,23px);
}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;
  background:conic-gradient(from 200deg,var(--neon),var(--mint),#0a6b52,var(--neon));
  clip-path:polygon(50% 0,72% 14%,95% 32%,100% 60%,82% 88%,50% 100%,18% 88%,0 60%,6% 30%,26% 10%);
  animation:breathe 6.5s ease-in-out infinite;
  filter:drop-shadow(0 0 10px rgba(0,255,65,.45));
}
@keyframes breathe{0%,100%{transform:scale(1);opacity:.92}50%{transform:scale(1.09);opacity:1}}
.cta{
  display:inline-flex;align-items:center;min-height:44px;padding:11px 22px;
  background:var(--neon);color:#00240f;text-decoration:none;
  font-family:var(--mono);font-size:13px;font-weight:500;letter-spacing:.14em;
  clip-path:polygon(0 0,100% 0,100% 68%,92% 100%,0 100%);
  transition:transform .25s var(--ease),filter .25s var(--ease);
}
.cta:hover{transform:translateY(-2px);filter:brightness(1.12)}
.menu-row{max-width:var(--max);margin:0 auto;padding:0 24px 10px;display:flex;align-items:center}
.burger{
  display:inline-flex;align-items:center;gap:11px;min-height:42px;padding:9px 16px;
  border:1px solid var(--line);background:rgba(153,255,204,.04);
  color:var(--mint);font-family:var(--mono);font-size:13px;letter-spacing:.16em;
  cursor:pointer;transition:background .25s var(--ease),border-color .25s var(--ease);
}
.burger:hover{background:rgba(153,255,204,.12);border-color:var(--mint)}
.burger-bars{width:17px;height:2px;background:currentColor;box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor}

/* ---------- 全屏遮罩菜单 ---------- */
.overlay{
  position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;justify-content:center;
  padding:90px 24px 60px;overflow-y:auto;
  background:rgba(0,18,31,.97);
  -webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);
  opacity:0;visibility:hidden;
  transition:opacity .34s var(--ease),visibility .34s var(--ease);
}
.overlay.is-open{opacity:1;visibility:visible}
.overlay-close{
  position:absolute;top:18px;right:18px;min-height:44px;padding:10px 20px;
  border:1px solid var(--mint);background:transparent;color:var(--mint);
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;cursor:pointer;
}
.overlay-close:hover{background:var(--mint);color:#00240f}
.overlay-nav{width:100%;max-width:720px;margin:0 auto}
.overlay-nav ul{list-style:none;margin:0;padding:0;counter-reset:m}
.overlay-nav li{counter-increment:m}
.overlay-nav a{
  display:flex;align-items:center;gap:16px;min-height:56px;padding:11px 4px;
  color:var(--text);text-decoration:none;font-weight:500;
  font-size:clamp(20px,4.6vw,30px);border-bottom:1px solid var(--line);
  transition:color .2s var(--ease),padding-left .25s var(--ease);
}
.overlay-nav a::before{
  content:counter(m,decimal-leading-zero);
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--neon);
}
.overlay-nav a:hover{color:var(--neon);padding-left:14px}

/* ---------- 主区网格 ---------- */
main{
  display:grid;grid-template-columns:minmax(0,1fr) 282px;gap:0 46px;
  max-width:var(--max);margin:0 auto;padding:0 24px 92px;
}
main > div{grid-column:1;min-width:0}
main > aside{grid-column:2;grid-row:2}
main > div.hero{grid-column:1 / -1}

/* ---------- Hero ---------- */
.hero{
  position:relative;display:grid;grid-template-columns:1.02fr .98fr;align-items:center;
  gap:38px;min-height:calc(100vh - 130px);padding:44px 0 86px;overflow:hidden;
}
.hero-copy{text-align:center;min-width:0}
.hero h1{
  margin:0 0 18px;font-size:clamp(30px,5.6vw,56px);line-height:1.1;font-weight:600;
  letter-spacing:-.015em;color:#eafff6;
  text-shadow:0 0 34px rgba(0,255,65,.28);
  animation:rise .9s var(--ease) both;
}
.hero-lead{
  margin:0 auto 26px;max-width:44ch;color:var(--muted);font-size:16px;line-height:1.85;
  animation:rise 1s .08s var(--ease) both;
}
.hero-actions{margin:0;animation:rise 1.1s .16s var(--ease) both}
.line-cta{
  display:inline-flex;align-items:center;min-height:44px;padding:10px 26px;
  border:1px solid var(--mint);color:var(--mint);text-decoration:none;
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;
  transition:background .25s var(--ease),color .25s var(--ease);
}
.line-cta:hover{background:var(--mint);color:#00240f}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

.hero-media{
  margin:0;justify-self:center;width:min(100%,430px);aspect-ratio:4/5;overflow:hidden;
  border-radius:46% 54% 38% 62% / 54% 42% 58% 46%;
  background:rgba(153,255,204,.07);
  box-shadow:0 34px 74px -44px rgba(0,255,65,.6),inset 0 0 0 1px rgba(153,255,204,.24);
  animation:morph 16s ease-in-out infinite;
}
.hero-media:empty{display:none}
.hero-media img{width:100%;height:100%;object-fit:cover;filter:saturate(1.06) contrast(1.03)}
@keyframes morph{
  0%,100%{border-radius:46% 54% 38% 62% / 54% 42% 58% 46%}
  50%{border-radius:58% 42% 60% 40% / 42% 58% 42% 58%}
}
.slash{
  position:absolute;left:0;right:0;bottom:0;height:130px;pointer-events:none;
  background:linear-gradient(100deg,rgba(153,255,204,.05),rgba(0,255,65,.3),rgba(153,255,204,.05));
  clip-path:polygon(0 100%,100% 8%,100% 100%);
  filter:blur(1px);
}

/* ---------- 右侧 aside ---------- */
.side{
  align-self:start;position:sticky;top:132px;
  padding:20px 18px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(153,255,204,.07),rgba(153,255,204,.015));
  box-shadow:0 22px 48px -34px rgba(0,0,0,.95);
}
.side h2{
  margin:0 0 14px;font-family:var(--mono);font-size:13px;font-weight:500;
  letter-spacing:.2em;color:var(--mint);
}
.side ul{list-style:none;margin:0;padding:0}
.side a{
  display:flex;align-items:center;min-height:40px;padding:9px 0;
  color:var(--text);text-decoration:none;font-size:15px;
  border-bottom:1px dashed var(--line-soft);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.side a:hover{color:var(--neon);padding-left:7px}

/* ---------- 正文 ---------- */
main > div:not(.hero){
  position:relative;padding:46px 0 12px;border-top:1px solid var(--line);
  scroll-margin-top:136px;
}
main small{
  display:block;margin-bottom:9px;
  font-family:var(--mono);font-size:12px;letter-spacing:.22em;color:var(--neon);
}
main > div h2{
  margin:0 0 18px;font-size:clamp(22px,3.5vw,30px);line-height:1.28;font-weight:600;
  letter-spacing:-.01em;color:var(--mint);
}
main > div h3{
  margin:30px 0 10px;font-size:clamp(18px,2.6vw,21px);line-height:1.4;
  font-weight:600;color:#c9ffe4;
}
main > div p{margin:0 0 16px;max-width:68ch}
main > div ul,main > div ol{max-width:68ch;padding-left:22px;margin:0 0 18px}
main > div li{margin:7px 0}
main > div ul li::marker{color:var(--neon)}
main > div a{color:var(--mint);text-underline-offset:3px}
main > div a:hover{color:var(--neon)}
main blockquote{
  margin:22px 0;padding:16px 20px;border-left:2px solid var(--neon);
  background:rgba(153,255,204,.05);color:#cff5e6;
}
main blockquote p:last-child{margin:0}
main figure{margin:22px 0}
main figure img{width:100%}
main figcaption{font-family:var(--mono);font-size:12.5px;color:var(--muted);margin-top:8px}
main table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15.5px}
main th,main td{border:1px solid var(--line);padding:10px 12px;text-align:left}
main th{background:rgba(153,255,204,.08);color:var(--mint)}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:70px;border-top:1px solid rgba(0,255,65,.36);
  background:linear-gradient(180deg,rgba(0,30,60,.62),rgba(0,18,31,.96));
  padding:48px 24px 26px;
}
.foot > *{max-width:var(--max);margin-inline:auto}
.sub{
  display:flex;flex-wrap:wrap;max-width:520px;margin:0 auto 42px !important;
  border:1px solid var(--line);background:rgba(0,0,0,.28);
}
.sub input{
  flex:1 1 190px;min-height:48px;padding:12px 16px;border:0;background:transparent;
  color:var(--text);font-family:var(--mono);font-size:15px;
}
.sub input::placeholder{color:var(--muted)}
.sub button{
  min-height:48px;padding:12px 24px;border:0;background:var(--mint);color:#00240f;
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;cursor:pointer;
  transition:filter .22s var(--ease);
}
.sub button:hover{filter:brightness(1.12)}
.foot-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:40px}
address{font-style:normal;display:grid;gap:12px;align-content:start}
.f-brand{font-weight:600;font-size:20px;color:var(--mint);letter-spacing:.04em}
.f-desc{color:var(--muted);font-size:15px;line-height:1.8;max-width:36ch}
.f-links{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.f-links ul{list-style:none;margin:0;padding:0}
.f-links dl{margin:0}
.f-links dt{
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;
  color:var(--neon);margin-bottom:10px;
}
.f-links dd{margin:0}
.f-links a{
  display:flex;align-items:center;min-height:40px;padding:8px 0;
  color:var(--text);text-decoration:none;font-size:15px;
  border-bottom:1px dashed var(--line-soft);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.f-links a:hover{color:var(--neon);padding-left:6px}
.foot-bottom{
  margin-top:36px !important;padding-top:18px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--muted);
  text-align:center;
}

/* ---------- 滚动显现 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.js [data-reveal].in{opacity:1;transform:none}

/* ---------- 响应 ---------- */
@media (max-width:980px){
  main{grid-template-columns:minmax(0,1fr);gap:0;padding:0 20px 70px}
  main > div,main > div.hero,main > aside{grid-column:1}
  main > aside{grid-row:auto;position:static;margin:26px 0 0;order:-1}
  .side ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:0 16px}
  .side a{border-bottom:1px dashed var(--line-soft)}
  .hero{grid-template-columns:1fr;min-height:0;padding:34px 0 66px;gap:28px}
  .hero-media{width:min(100%,340px);aspect-ratio:1/1}
  .foot-grid{grid-template-columns:1fr;gap:30px}
}
@media (max-width:560px){
  body{font-size:16.5px}
  .brand-row{padding:11px 18px}
  .menu-row{padding:0 18px 9px}
  .overlay{padding:84px 18px 50px}
  .foot-grid{gap:26px}
  .f-links{grid-template-columns:1fr;gap:18px}
  .hero h1{font-size:clamp(28px,8.6vw,38px)}
  .side ul{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .js [data-reveal]{opacity:1;transform:none}
}

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