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

:root{
  --ink:#001e3c;
  --ink2:#02294a;
  --mint:#99ffcc;
  --neon:#00ff41;
  --text:#d7f6e8;
  --dim:#9fc4bb;
  --line:rgba(153,255,204,.22);
  --line-soft:rgba(153,255,204,.12);
  --r:28px;
  --font:'Outfit','Work Sans',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
}

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

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

body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  font-weight:300;
  line-height:1.75;
  letter-spacing:.012em;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:-25vh -15vw;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(34% 30% at 16% 10%,rgba(0,255,65,.20),transparent 70%),
    radial-gradient(28% 26% at 84% 6%,rgba(153,255,204,.20),transparent 72%),
    radial-gradient(44% 40% at 74% 92%,rgba(0,255,65,.11),transparent 74%);
  filter:blur(46px);
  animation:breathe 15s ease-in-out infinite;
}

@keyframes breathe{
  0%,100%{transform:scale(1) translate3d(0,0,0);opacity:.85}
  50%{transform:scale(1.13) translate3d(0,-2%,0);opacity:1}
}

img{max-width:100%;height:auto;display:block}

a{color:var(--neon);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}

h1,h2,h3,h4{
  font-weight:600;
  line-height:1.22;
  letter-spacing:-.015em;
  color:var(--mint);
  margin:0 0 .5em;
}

p{margin:0 0 1.05em}

hr{
  border:0;
  height:2px;
  margin:.55rem 0 1.5rem;
  background:linear-gradient(90deg,var(--neon),rgba(0,255,65,0));
  opacity:.75;
}

.skip{
  position:absolute;
  left:12px;
  top:-60px;
  z-index:120;
  padding:10px 18px;
  border-radius:999px;
  background:var(--neon);
  color:var(--ink);
  font-weight:600;
  transition:top .2s ease;
}
.skip:focus{top:12px}

/* ---------- 头部 ---------- */
.masthead{
  position:relative;
  z-index:50;
  padding:14px 16px 6px;
}
.mast-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  max-width:1240px;
  margin:0 auto;
}
.brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  border-radius:18px;
  border:1px solid var(--line);
  background:rgba(153,255,204,.07);
  overflow:hidden;
  flex:0 0 auto;
}
.brand img{width:100%;height:100%;object-fit:cover}
.brand-txt{
  width:auto;
  padding:0 16px;
  height:44px;
  font-size:16px;
  font-weight:600;
  color:var(--mint);
  letter-spacing:.04em;
}
.cta{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 20px;
  border-radius:999px;
  background:var(--neon);
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  white-space:nowrap;
}
.cta:hover{text-decoration:none;filter:brightness(1.08)}

/* ---------- 粘性胶囊锚点条 ---------- */
.railbar{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(0,30,60,.86);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
}
.rail{
  display:flex;
  gap:8px;
  padding:10px 16px;
  max-width:1240px;
  margin:0 auto;
  overflow-x:auto;
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none}
.pill{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 17px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--mint);
  font-size:16px;
  font-weight:500;
  white-space:nowrap;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.pill:hover{background:rgba(153,255,204,.12);text-decoration:none}
.pill.is-on{background:var(--neon);border-color:var(--neon);color:var(--ink);font-weight:600}

/* ---------- 头部大图 ---------- */
.hero{
  position:relative;
  z-index:1;
  display:flex;
  align-items:flex-end;
  min-height:45vh;
  padding:clamp(30px,7vw,60px) clamp(18px,5vw,64px) clamp(30px,6vw,58px);
  overflow:hidden;
  isolation:isolate;
  background:
    radial-gradient(60% 80% at 8% 100%,rgba(0,255,65,.22),transparent 70%),
    radial-gradient(50% 70% at 92% 0%,rgba(153,255,204,.18),transparent 72%),
    linear-gradient(160deg,#012b4d,#001e3c 65%);
}
.hero-img{
  position:absolute;
  inset:0;
  z-index:-3;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(1.05) contrast(1.02);
}
.veil{
  position:absolute;
  inset:0;
  z-index:-2;
  background:linear-gradient(100deg,rgba(0,30,60,.95) 10%,rgba(0,30,60,.68) 48%,rgba(0,30,60,.34) 100%);
}
.hero-img-on .veil{
  background:linear-gradient(100deg,rgba(0,30,60,.96) 8%,rgba(0,30,60,.7) 46%,rgba(0,30,60,.3) 100%);
}
.memb{
  position:absolute;
  border-radius:46% 54% 58% 42%/52% 44% 56% 48%;
  border:1px solid rgba(153,255,204,.3);
  filter:blur(1px);
  pointer-events:none;
  z-index:-1;
}
.m1{
  width:230px;
  height:210px;
  right:-70px;
  bottom:-60px;
  background:radial-gradient(circle at 35% 30%,rgba(0,255,65,.22),transparent 68%);
  animation:breathe 11s ease-in-out infinite,drift 18s ease-in-out infinite;
}
.m2{
  width:150px;
  height:140px;
  right:120px;
  top:-50px;
  background:radial-gradient(circle at 60% 60%,rgba(153,255,204,.2),transparent 70%);
  animation:breathe 9s ease-in-out infinite reverse;
}
@keyframes drift{
  0%,100%{transform:translate3d(0,0,0) rotate(0deg)}
  50%{transform:translate3d(-14px,-10px,0) rotate(8deg)}
}
.badge{
  position:absolute;
  top:16px;
  right:16px;
  padding:7px 15px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(0,30,60,.6);
  color:var(--mint);
  font-size:15px;
  font-weight:500;
  letter-spacing:.06em;
  backdrop-filter:blur(6px);
  animation:float 7s ease-in-out infinite;
}
@keyframes float{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-7px)}
}
.hero-inner{
  position:relative;
  max-width:800px;
}
.hero h1{
  font-size:clamp(30px,6vw,56px);
  font-weight:700;
  color:var(--mint);
  margin:0 0 .35em;
  text-shadow:0 2px 30px rgba(0,30,60,.75);
}
.lead{
  max-width:56ch;
  margin:0;
  font-size:17px;
  color:#c3ebdc;
}

/* ---------- 主体骨架 ---------- */
.wrap{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,236px) minmax(0,1fr);
  gap:clamp(26px,4vw,60px);
  max-width:1240px;
  margin:0 auto;
  padding:clamp(30px,5vw,64px) clamp(18px,5vw,64px) 90px;
}

.side{
  position:sticky;
  top:84px;
  align-self:start;
  padding:20px 18px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(2,41,74,.62);
}
.side h2{
  font-size:17px;
  letter-spacing:.16em;
  color:var(--mint);
  margin:0;
}
.side hr{margin:.5rem 0 1rem}
.side-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}
.side-list a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  padding:2px 0;
  color:var(--text);
  font-size:16px;
  line-height:1.3;
  border-bottom:1px solid var(--line-soft);
}
.side-list li:last-child a{border-bottom:0}
.side-list a:hover{color:var(--neon);text-decoration:none}
.idx{
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--neon);
  opacity:.85;
  font-variant-numeric:tabular-nums;
}

.stage{min-width:0}
.prose{max-width:70ch}

.prose div{
  position:relative;
  padding:clamp(26px,4vw,46px) 0;
  border-top:1px solid var(--line-soft);
  scroll-margin-top:96px;
}
.prose div:first-child{border-top:0;padding-top:0}
.prose h2{
  font-size:clamp(22px,3.2vw,32px);
  margin-bottom:.2em;
}
.prose h3{
  font-size:clamp(19px,2.2vw,22px);
  color:var(--mint);
  margin-top:1.5em;
}
.prose p{color:var(--text)}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin:.35em 0}
.prose strong{color:var(--mint);font-weight:600}
.prose blockquote{
  margin:1.4em 0;
  padding:16px 22px;
  border-left:3px solid var(--neon);
  border-radius:0 var(--r) var(--r) 0;
  background:rgba(0,255,65,.07);
  color:#e2fff3;
}
.prose blockquote p:last-child{margin:0}
.prose img{
  margin:1.4em 0;
  border-radius:var(--r);
  border:1px solid var(--line);
}
.prose figure{margin:1.4em 0}
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:1.2em 0;
  font-size:16px;
  display:block;
  overflow-x:auto;
}
.prose th,.prose td{
  border:1px solid var(--line);
  padding:10px 12px;
  text-align:left;
}
.prose th{color:var(--mint);background:rgba(153,255,204,.08)}
.prose code{
  font-family:ui-monospace,'SFMono-Regular',Menlo,monospace;
  font-size:.92em;
  background:rgba(153,255,204,.12);
  border-radius:6px;
  padding:.1em .4em;
}

/* ---------- 页脚 ---------- */
.site-foot{
  position:relative;
  z-index:1;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(2,41,74,.55),rgba(0,30,60,.95));
  padding:clamp(34px,5vw,56px) clamp(18px,5vw,64px) 26px;
}
.foot-top{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(22px,4vw,54px);
  max-width:1240px;
  margin:0 auto;
}
.fcol{margin:0}
.fcol dt{
  font-size:16px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--neon);
  margin-bottom:12px;
}
.fcol dd{
  margin:0;
  font-size:16px;
  color:var(--dim);
  line-height:1.6;
}
.fnav dd a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 2px;
  color:var(--text);
  border-bottom:1px solid transparent;
}
.fnav dd a:hover{color:var(--neon);border-bottom-color:var(--neon);text-decoration:none}

.subform{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  max-width:260px;
}
.subform input{
  flex:1 1 120px;
  min-height:44px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(0,30,60,.7);
  color:var(--text);
  font-family:inherit;
  font-size:16px;
}
.subform input::placeholder{color:rgba(215,246,232,.55)}
.subform input:focus{outline:2px solid var(--neon);outline-offset:1px}
.subform button{
  min-height:44px;
  padding:0 20px;
  border:0;
  border-radius:999px;
  background:var(--neon);
  color:var(--ink);
  font-family:inherit;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
}
.subform button:hover{filter:brightness(1.08)}

.foot-end{
  max-width:1240px;
  margin:clamp(28px,4vw,44px) auto 0;
  padding-top:18px;
  border-top:1px solid var(--line-soft);
  text-align:center;
}
.foot-end p{
  margin:0;
  font-size:15px;
  color:var(--dim);
  letter-spacing:.06em;
}

/* ---------- 滚动显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1);
  transition-delay:var(--d,0ms);
}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr);gap:24px}
  .side{position:static;top:auto}
  .side-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 14px}
  .foot-top{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .fsub{grid-column:1 / -1}
}

@media (max-width:600px){
  body{font-size:16px}
  .hero{min-height:44vh;padding-top:44px}
  .badge{top:12px;right:12px;font-size:14px;padding:6px 13px}
  .side{padding:16px 14px}
  .side-list{grid-template-columns:minmax(0,1fr)}
  .foot-top{grid-template-columns:minmax(0,1fr)}
  .fsub{grid-column:auto}
  .subform{max-width:none}
  .m1{width:170px;height:160px;right:-60px}
  .m2{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before,.m1,.m2,.badge{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
}

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