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

:root{
  --ink:#001e3c;
  --mint:#99ffcc;
  --neon:#00ff41;
  --paper:#e2f8ee;
  --muted:#9cc0cf;
  --line:rgba(153,255,204,.24);
  --card:rgba(153,255,204,.07);
  --display:'Amatic SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --body:'Cabin','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  padding-bottom:86px;
  font-family:var(--body);
  font-size:17px;
  line-height:1.8;
  color:var(--paper);
  background:
    radial-gradient(circle at 14% 8%, rgba(0,255,65,.13), transparent 44%),
    radial-gradient(circle at 88% 72%, rgba(153,255,204,.12), transparent 52%),
    var(--ink);
  background-attachment:fixed;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(153,255,204,.17) 1px, transparent 1.5px);
  background-size:23px 23px;
  opacity:.55;
  mask-image:radial-gradient(circle at 50% 30%, #000 10%, transparent 92%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%, #000 10%, transparent 92%);
}

h1,h2,h3{
  font-family:var(--display);
  font-weight:700;
  letter-spacing:.01em;
}

p{margin:0 0 1em}

a{color:var(--neon)}

/* ---------- hero ---------- */
.hero{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin:0 auto;
  padding:clamp(18px,3vw,34px) clamp(16px,4vw,40px) 0;
  min-height:45vh;
  display:grid;
  grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  gap:clamp(16px,3vw,38px);
  align-items:center;
}

.hero-copy{text-align:right}

.kicker{
  display:inline-block;
  font-size:1rem;
  letter-spacing:.26em;
  color:var(--neon);
  text-transform:uppercase;
}

.hero-copy h1{
  margin:.12em 0 .28em;
  font-size:clamp(2.4rem,7vw,4.1rem);
  line-height:1.04;
  color:var(--mint);
  text-shadow:0 0 34px rgba(0,255,65,.3);
}

.lede{
  font-size:1.05rem;
  color:var(--paper);
  opacity:.85;
  max-width:34ch;
  margin-left:auto;
}

.cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  margin-top:10px;
  padding:12px 28px;
  border-radius:999px;
  background:linear-gradient(120deg,var(--neon),var(--mint));
  color:#002616;
  font-weight:700;
  text-decoration:none;
  box-shadow:0 8px 26px rgba(0,255,65,.22);
  transition:transform .25s ease, box-shadow .25s ease;
}

.cta:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,255,65,.35)}

.hero-art{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  max-height:32vh;
  overflow:hidden;
  border-radius:56% 44% 48% 52% / 50% 52% 48% 50%;
  background:conic-gradient(from 30deg, rgba(0,255,65,.4), rgba(153,255,204,.16) 35%, rgba(0,30,60,.92) 62%, rgba(0,255,65,.4));
  box-shadow:inset 0 0 70px rgba(0,255,65,.3), 0 0 70px rgba(0,255,65,.14);
  animation:morph 17s ease-in-out infinite, breathe 8s ease-in-out infinite;
}

.hero-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  mix-blend-mode:luminosity;
  opacity:.92;
}

@keyframes morph{
  0%,100%{border-radius:56% 44% 48% 52% / 50% 52% 48% 50%}
  33%{border-radius:44% 56% 62% 38% / 46% 60% 40% 54%}
  66%{border-radius:60% 40% 42% 58% / 58% 42% 58% 42%}
}

@keyframes breathe{
  0%,100%{transform:scale(1)}
  50%{transform:scale(1.035)}
}

/* ---------- 主栅格 ---------- */
main{position:relative;z-index:1}

.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:clamp(28px,5vw,58px) clamp(16px,4vw,40px) 44px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 248px;
  gap:clamp(24px,4vw,48px);
  align-items:start;
}

.rail{
  position:sticky;
  top:24px;
  padding-left:20px;
  border-left:1px solid var(--line);
}

.eyebrow{
  display:block;
  font-size:.95rem;
  letter-spacing:.24em;
  color:var(--neon);
  margin-bottom:2px;
}

.rail h2{
  margin:0 0 12px;
  font-size:2rem;
  line-height:1.1;
  color:var(--mint);
}

.toc{
  list-style:none;
  margin:0;
  padding:0;
  counter-reset:toc;
}

.toc li{counter-increment:toc}

.toc a{
  display:block;
  padding:10px 0;
  min-height:42px;
  font-size:1rem;
  color:var(--paper);
  text-decoration:none;
  border-bottom:1px dashed rgba(153,255,204,.16);
  transition:color .2s ease, padding-left .2s ease;
}

.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--display);
  font-size:1.15rem;
  margin-right:8px;
  color:var(--neon);
}

.toc a:hover{color:var(--neon);padding-left:5px}

/* ---------- 正文 ---------- */
.prose{min-width:0}

.prose article{
  position:relative;
  margin-bottom:26px;
  padding:26px clamp(18px,3vw,34px);
  border-radius:10px;
  background:linear-gradient(180deg, var(--card), rgba(0,30,60,.34));
  scroll-margin-top:18px;
  scroll-margin-bottom:100px;
}

.prose article::after{
  content:"";
  position:absolute;
  left:18px;
  right:18px;
  bottom:0;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg, var(--neon), rgba(153,255,204,.12));
}

.prose h2{
  margin:0 0 .45em;
  font-size:clamp(1.7rem,3.6vw,2.3rem);
  line-height:1.14;
  color:var(--mint);
}

.prose h3{
  margin:1.4em 0 .4em;
  font-size:1.32rem;
  color:var(--mint);
}

.prose ul,.prose ol{padding-left:1.25em}
.prose li{margin-bottom:.45em}
.prose strong{color:var(--mint)}

.prose a{
  color:var(--neon);
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}

.prose blockquote{
  margin:1.2em 0;
  padding:12px 20px;
  border-left:3px solid var(--neon);
  border-radius:0 10px 10px 0;
  background:rgba(0,255,65,.07);
  color:var(--paper);
}

.prose blockquote p:last-child{margin-bottom:0}

.prose img{
  max-width:100%;
  height:auto;
  border-radius:10px;
}

.prose hr{
  border:0;
  height:1px;
  margin:1.6em 0;
  background:var(--line);
}

/* ---------- 页脚 ---------- */
footer{
  position:relative;
  z-index:1;
  max-width:1180px;
  margin:0 auto;
  padding:26px clamp(16px,4vw,40px) 40px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:8px 24px;
  border-top:1px solid var(--line);
}

.foot-brand{
  margin:0;
  font-family:var(--display);
  font-size:1.7rem;
  line-height:1.2;
  color:var(--mint);
}

.foot-links{
  margin:0;
  display:flex;
  flex-wrap:wrap;
  gap:2px 16px;
  justify-content:flex-end;
}

.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 2px;
  font-size:1rem;
  color:var(--paper);
  text-decoration:none;
}

.foot-links a:hover{color:var(--neon)}

footer small{
  grid-column:1 / -1;
  margin-top:10px;
  padding-top:12px;
  text-align:center;
  font-size:1rem;
  color:var(--muted);
  border-top:1px dashed rgba(153,255,204,.14);
}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:70;
  display:flex;
  align-items:center;
  gap:18px;
  padding:8px clamp(14px,4vw,32px);
  background:rgba(0,22,44,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
}

.mark{
  display:flex;
  align-items:center;
  min-height:44px;
  font-family:var(--display);
  font-size:1.75rem;
  line-height:1;
  color:var(--mint);
  text-decoration:none;
}

.dock-list{
  list-style:none;
  display:flex;
  gap:16px;
  margin:0 auto 0 0;
  padding:0;
}

.dock-list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 2px;
  font-size:1rem;
  color:var(--paper);
  text-decoration:none;
  white-space:nowrap;
}

.dock-list a:hover{color:var(--neon)}

.burger{
  margin-left:auto;
  min-height:44px;
  padding:10px 22px;
  font-family:var(--body);
  font-size:1rem;
  color:var(--neon);
  background:transparent;
  border:1px solid var(--neon);
  border-radius:999px;
  cursor:pointer;
  transition:background .25s ease, color .25s ease;
}

.burger:hover{background:rgba(0,255,65,.14)}
.burger:focus-visible{outline:2px solid var(--mint);outline-offset:3px}

/* ---------- 全屏遮罩菜单 ---------- */
.veil{
  position:fixed;
  inset:0;
  z-index:65;
  display:grid;
  place-items:center;
  padding:80px 24px 110px;
  overflow-y:auto;
  background:rgba(0,18,36,.96);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  opacity:0;
  visibility:hidden;
  transition:opacity .35s ease, visibility .35s ease;
}

.veil.open{opacity:1;visibility:visible}

.veil-list{
  list-style:none;
  margin:0;
  padding:0;
  text-align:center;
}

.veil-list a{
  display:block;
  min-height:48px;
  padding:14px 12px;
  font-family:var(--display);
  font-size:clamp(1.7rem,5vw,2.4rem);
  line-height:1.2;
  color:var(--mint);
  text-decoration:none;
  letter-spacing:.04em;
  transition:color .2s ease, transform .2s ease;
}

.veil-list a:hover{color:var(--neon);transform:translateY(-2px)}

/* ---------- 滚动显现 ---------- */
.rv{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .65s ease, transform .65s ease;
}

.rv.in{opacity:1;transform:none}

/* ---------- 窄屏 ---------- */
@media (max-width:880px){
  body{font-size:17px}
  .hero{
    grid-template-columns:1fr;
    min-height:0;
    padding-bottom:6px;
  }
  .hero-copy{text-align:left;order:1}
  .lede{margin-left:0;max-width:none}
  .hero-art{
    order:2;
    aspect-ratio:16/7;
    max-height:20vh;
    min-height:88px;
    margin-top:6px;
  }
  .wrap{grid-template-columns:1fr;padding-top:26px}
  .rail{
    position:static;
    border-left:0;
    border-top:1px solid var(--line);
    padding-left:0;
    padding-top:18px;
  }
  .toc{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}
  .dock-list{display:none}
  footer{grid-template-columns:1fr}
  .foot-links{justify-content:flex-start}
}

@media (max-width:420px){
  .mark{font-size:1.5rem}
  .toc{grid-template-columns:1fr}
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .rv{opacity:1;transform:none}
}

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