@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400&family=Playfair+Display:ital@1&display=swap');

:root{
  --neon:#69ff69;
  --cyan:#00ffff;
  --ink:#0a140b;
  --panel:#152618;
  --panel-2:#1b3320;
  --line:rgba(105,255,105,.2);
  --text:#e3ffe6;
  --dim:#a9c9ae;
  --chrome:linear-gradient(135deg,#effff3 0%,#9fb6a6 26%,#ffffff 48%,#7f9c86 66%,#dff6e6 100%);
  --r:28px;
  --dock:96px;
}

*{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  background:var(--ink);
  -webkit-text-size-adjust:100%;
  max-width:100%;
  overflow-x:hidden;
}

body{
  margin:0;
  max-width:100%;
  overflow-x:hidden;
  font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(circle at 12% 6%, rgba(0,255,255,.16), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(105,255,105,.14), transparent 46%),
    radial-gradient(circle at 50% 98%, rgba(0,255,255,.1), transparent 55%),
    var(--ink);
  background-attachment:fixed;
  padding-bottom:var(--dock);
}

img,svg,video,iframe{max-width:100%}
img{height:auto}
a{-webkit-tap-highlight-color:transparent}
main,.stage,.content,.side,.content>section{min-width:0}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:8px;
  padding:8px clamp(10px,3vw,28px) calc(8px + env(safe-area-inset-bottom));
  background:linear-gradient(180deg,rgba(21,38,24,.93),rgba(10,20,11,.99));
  border-top:1px solid var(--line);
  backdrop-filter:blur(14px);
}

.dock-nav{display:none;min-width:0}
.dock-nav p{display:flex;gap:2px;margin:0;min-width:0}
.dock-l{justify-content:flex-start}
.dock-r{justify-content:flex-end}
.dock-r p{justify-content:flex-end}

.dock-nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 10px;
  font-size:16px;
  line-height:1.2;
  color:var(--dim);
  text-decoration:none;
  border-radius:999px;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.dock-nav a:hover,
.dock-nav a:focus-visible{
  color:#04170a;
  background:var(--neon);
  box-shadow:0 0 18px rgba(105,255,105,.55);
}

.brand{
  grid-column:2;
  justify-self:center;
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  font-size:18px;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  background:var(--chrome);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 10px rgba(105,255,105,.5));
}

/* ---------- 汉堡 ---------- */
.burger{
  position:fixed;
  right:14px;
  bottom:calc(var(--dock) + 8px);
  z-index:70;
  width:60px;height:60px;
  display:grid;place-items:center;
  border:0;border-radius:50%;
  font:700 15px/1 Inter,system-ui,sans-serif;
  color:#04170a;
  background:radial-gradient(circle at 30% 22%,#ffffff,var(--neon) 55%,#2fce59);
  box-shadow:0 0 0 2px rgba(105,255,105,.32),0 0 26px rgba(105,255,105,.45);
  cursor:pointer;
  transition:transform .18s ease;
}
.burger:active{transform:scale(.93)}

/* ---------- 全屏遮罩 ---------- */
.veil{
  position:fixed;
  inset:0;
  z-index:80;
  display:flex;
  flex-direction:column;
  width:100%;
  max-width:100%;
  padding:clamp(16px,4vw,40px);
  padding-bottom:120px;
  overflow-y:auto;
  overflow-x:hidden;
  background:
    radial-gradient(circle at 82% 8%,rgba(0,255,255,.24),transparent 50%),
    radial-gradient(circle at 8% 92%,rgba(105,255,105,.18),transparent 46%),
    rgba(7,15,8,.975);
  transform:translateY(103%);
  transition:transform .36s cubic-bezier(.2,.8,.3,1);
}
body.veil-open .veil{transform:translateY(0)}
body.veil-open{overflow:hidden}

.veil-top{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  min-width:0;
}
.veil-lab{
  font-size:16px;
  letter-spacing:.18em;
  color:var(--neon);
}
#veil-q{
  flex:1 1 160px;
  min-width:0;
  min-height:50px;
  padding:0 18px;
  font:inherit;
  font-size:17px;
  color:var(--text);
  background:rgba(0,255,255,.08);
  border:1px solid rgba(0,255,255,.55);
  border-radius:999px;
  outline-offset:3px;
}
#veil-q::placeholder{color:rgba(169,201,174,.8)}
.veil-close{
  min-height:50px;
  padding:0 22px;
  font:700 16px/1 inherit;
  color:#04170a;
  background:var(--cyan);
  border:0;
  border-radius:999px;
  cursor:pointer;
  box-shadow:0 0 22px rgba(0,255,255,.45);
}

.veil-nav p{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:26px 0 0;
  min-width:0;
}
.veil-nav a{
  display:flex;
  align-items:center;
  min-height:58px;
  padding:0 20px;
  font-size:21px;
  font-weight:700;
  color:var(--text);
  text-decoration:none;
  border-radius:20px;
  background:rgba(105,255,105,.08);
  border-bottom:1px solid rgba(0,255,255,.14);
}
.veil-nav a:hover,
.veil-nav a:focus-visible{
  color:#04170a;
  background:linear-gradient(100deg,var(--neon),var(--cyan));
}
body.veil-open .veil-nav a{animation:pop .4s both ease}
body.veil-open .veil-nav a:nth-child(1){animation-delay:.04s}
body.veil-open .veil-nav a:nth-child(2){animation-delay:.08s}
body.veil-open .veil-nav a:nth-child(3){animation-delay:.12s}
body.veil-open .veil-nav a:nth-child(4){animation-delay:.16s}
body.veil-open .veil-nav a:nth-child(5){animation-delay:.2s}
body.veil-open .veil-nav a:nth-child(6){animation-delay:.24s}
body.veil-open .veil-nav a:nth-child(7){animation-delay:.28s}
@keyframes pop{
  from{opacity:0;transform:translateY(14px) scale(.98)}
  to{opacity:1;transform:none}
}

/* ---------- 首屏 ---------- */
.hero{
  display:flex;
  flex-direction:column-reverse;
  gap:20px;
  max-width:1240px;
  margin:0 auto;
  padding:clamp(18px,4vw,44px) clamp(14px,4vw,48px) 22px;
  min-height:70vh;
}

.hero-fig{
  position:relative;
  margin:0;
  width:100%;
  min-height:38vh;
  border-radius:36px;
  overflow:hidden;
  background:linear-gradient(135deg,rgba(0,255,255,.36),rgba(105,255,105,.46));
  box-shadow:0 0 0 1px rgba(0,255,255,.3),0 22px 60px rgba(0,255,255,.16);
}
.hero-fig img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.bubble{
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 30% 30%,rgba(255,255,255,.85),transparent 32%),
    radial-gradient(circle at 70% 66%,rgba(0,255,255,.75),transparent 30%),
    radial-gradient(circle at 48% 78%,rgba(105,255,105,.8),transparent 38%),
    linear-gradient(150deg,#0d3a2c,#0a2634);
}

.badge{
  position:absolute;
  top:14px;left:14px;
  z-index:2;
  display:grid;
  padding:8px 16px;
  font-size:16px;
  letter-spacing:.14em;
  color:var(--neon);
  background:rgba(9,18,10,.78);
  border:1px solid var(--neon);
  border-radius:999px;
  box-shadow:0 0 18px rgba(105,255,105,.4);
}
.badge-slide{
  grid-area:1/1;
  opacity:0;
  animation:swap 9s infinite both;
}
.badge-slide.s2{animation-delay:4.5s}
@keyframes swap{
  0%{opacity:0}
  6%{opacity:1}
  44%{opacity:1}
  50%{opacity:0}
  100%{opacity:0}
}

.hero-copy{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:16px;
  text-align:right;
  min-width:0;
}

h1{
  margin:0;
  font-size:clamp(31px,6vw,60px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-.012em;
  overflow-wrap:anywhere;
  background:linear-gradient(120deg,#ffffff 0%,#c9ffd4 28%,var(--neon) 62%,var(--cyan) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 18px rgba(105,255,105,.35));
}

.lead{
  margin:0;
  max-width:48ch;
  font-size:17px;
  color:var(--dim);
}

.hero-cta{margin:0}
.hero-cta a{
  display:inline-flex;
  align-items:center;
  min-height:50px;
  padding:0 28px;
  font-weight:700;
  color:#04170a;
  text-decoration:none;
  border-radius:999px;
  background:radial-gradient(circle at 28% 20%,#ffffff,var(--neon) 58%,#2fce59);
  box-shadow:0 0 26px rgba(105,255,105,.45);
  transition:transform .18s ease;
}
.hero-cta a:active{transform:scale(.96)}

/* ---------- 主体 ---------- */
.stage{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:20px;
  max-width:1240px;
  margin:0 auto;
  padding:16px clamp(14px,3vw,40px) 48px;
}

.side{
  padding:16px;
  border-radius:var(--r);
  background:linear-gradient(160deg,rgba(0,255,255,.14),rgba(105,255,105,.05));
}
.side-label{
  margin:0 0 10px;
  font-size:16px;
  letter-spacing:.2em;
  color:var(--cyan);
}
.toc{
  display:flex;
  gap:8px;
  margin:0;
  padding:0 0 6px;
  list-style:none;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  -webkit-overflow-scrolling:touch;
}
.toc li{flex:0 0 auto}
.toc a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:16px;
  color:var(--text);
  text-decoration:none;
  background:rgba(10,20,11,.55);
  border-radius:999px;
  white-space:nowrap;
}
.toc a:hover,
.toc a:focus-visible{color:#04170a;background:var(--cyan)}
.totop{display:none}

.content{
  min-width:0;
  max-width:100%;
  overflow-wrap:anywhere;
}
.content > section{
  margin-bottom:22px;
  padding:clamp(20px,3vw,36px);
  border-radius:var(--r);
  background:var(--panel);
  scroll-margin-top:22px;
  scroll-margin-bottom:calc(var(--dock) + 22px);
  overflow-x:clip;
}
.content > section > *{max-width:100%}
.content > section:nth-child(even){background:var(--panel-2)}
.content > section:last-child{margin-bottom:0}

.content h2{
  margin:0 0 8px;
  font-size:clamp(21px,3vw,29px);
  line-height:1.32;
  font-weight:800;
  color:#ffffff;
  letter-spacing:-.006em;
  overflow-wrap:anywhere;
}
.content h3{
  margin:24px 0 8px;
  font-size:19px;
  line-height:1.4;
  color:var(--neon);
  overflow-wrap:anywhere;
}
.content p{margin:0 0 14px;color:#d7f2db}
.content p:last-child{margin-bottom:0}
.content .subtitle,
.subtitle{
  margin:0 0 12px;
  font-size:17px;
  color:var(--dim);
}
.content ul,.content ol{margin:0 0 16px;padding-left:1.25em}
.content li{margin-bottom:8px}
.content a{color:var(--cyan);text-underline-offset:3px;overflow-wrap:anywhere}
.content strong{color:var(--neon)}
.content blockquote{
  margin:16px 0;
  padding:12px 16px;
  border-left:3px solid var(--neon);
  border-radius:0 16px 16px 0;
  background:rgba(105,255,105,.08);
}
.content table{
  display:block;
  width:100%;
  max-width:100%;
  margin:0 0 16px;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  -webkit-overflow-scrolling:touch;
  border-collapse:collapse;
  font-size:16px;
}
.content th,.content td{
  padding:8px 10px;
  border-bottom:1px solid var(--line);
  text-align:left;
  white-space:nowrap;
}
.content code{
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:15px;
  color:var(--cyan);
  overflow-wrap:anywhere;
}
.content pre{
  max-width:100%;
  padding:12px 14px;
  overflow-x:auto;
  border-radius:16px;
  background:rgba(0,255,255,.07);
}
.content pre code{white-space:pre}
.content figure,.content aside{margin-left:0;margin-right:0;max-width:100%}
.content img{border-radius:20px}

/* ---------- 页脚 ---------- */
footer{
  max-width:1240px;
  margin:0 auto;
  padding:12px clamp(14px,3vw,40px) 44px;
}

.cta{
  position:relative;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:10px;
  padding:clamp(26px,5vw,54px);
  border-radius:36px;
  background:
    radial-gradient(circle at 18% 12%,rgba(0,255,255,.5),transparent 52%),
    radial-gradient(circle at 88% 82%,rgba(105,255,105,.36),transparent 48%),
    linear-gradient(135deg,#153420,#0a2a2c);
}
.cta::after{
  content:"";
  position:absolute;
  right:-40px;bottom:-60px;
  width:180px;height:180px;
  border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#ffffff,var(--neon) 58%,rgba(0,255,255,.5));
  opacity:.55;
  filter:blur(1px);
}
.cta h2{
  position:relative;
  z-index:1;
  margin:0;
  font-size:clamp(27px,5vw,46px);
  line-height:1.15;
  font-weight:800;
  color:#ffffff;
  letter-spacing:-.01em;
}
.cta .subtitle{
  position:relative;
  z-index:1;
  margin:0;
  color:var(--cyan);
  letter-spacing:.14em;
}
.cta-link{
  position:relative;
  z-index:1;
  display:inline-flex;
  align-items:center;
  min-height:48px;
  margin-top:6px;
  padding:0 26px;
  font-weight:700;
  color:#04170a;
  text-decoration:none;
  border-radius:999px;
  background:linear-gradient(100deg,var(--neon),var(--cyan));
  box-shadow:0 0 24px rgba(0,255,255,.4);
}

.foot-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  min-width:0;
  margin-top:18px;
  font-size:16px;
  color:var(--dim);
}
.foot-brand a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 10px;
  font-weight:800;
  font-size:17px;
  text-decoration:none;
  background:var(--chrome);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.foot-row nav{min-width:0}
.foot-row nav p{display:flex;gap:4px;margin:0;flex-wrap:wrap;min-width:0}
.foot-row nav a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  color:var(--dim);
  text-decoration:none;
  border-radius:999px;
}
.foot-row nav a:hover,
.foot-row nav a:focus-visible{color:#04170a;background:var(--neon)}
.foot-copy{padding:0 10px;font-size:16px}

/* ---------- 断点 ---------- */
@media (min-width:900px){
  .dock-nav{display:flex}
  .dock{gap:14px}
}

@media (min-width:860px){
  .hero{
    flex-direction:row;
    align-items:center;
    gap:clamp(24px,4vw,56px);
  }
  .hero-fig{flex:0 0 46%;min-height:56vh}
  .hero-copy{flex:1 1 auto}
}

@media (min-width:960px){
  .stage{
    grid-template-columns:232px minmax(0,1fr);
    gap:32px;
    align-items:start;
  }
  .side{position:sticky;top:24px}
  .toc{flex-direction:column;overflow:visible;padding-bottom:0}
  .toc li{flex:1 1 auto}
  .toc a{white-space:normal;padding:0 12px}
  .totop{
    display:flex;
    align-items:center;
    min-height:44px;
    margin-top:10px;
    padding:0 12px;
    font-size:16px;
    color:var(--neon);
    text-decoration:none;
    border-radius:999px;
    background:rgba(105,255,105,.12);
  }
  .cta{padding:clamp(34px,4vw,58px)}
}

@media (max-width:400px){
  .brand{font-size:17px;padding:0 6px}
  .hero-copy{gap:12px}
  .content th,.content td{padding:7px 8px;font-size:15px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.001s !important;
    animation-iteration-count:1 !important;
    transition-duration:.001s !important;
  }
}

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