*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
:root{
  --ink:#001e3c;--mint:#99ffcc;--neon:#00ff41;
  --fg:#e9f8f0;--dim:#a3c4b7;--line:rgba(153,255,204,.22);
  --r:28px;--max:1180px;
  --ff:Lexend,"Source Sans 3",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
body{margin:0;background:var(--ink);color:var(--fg);font-family:var(--ff);font-size:17px;line-height:1.7;overflow-x:hidden}
body::before{
  content:"";position:fixed;inset:-25vh -15vw;z-index:0;pointer-events:none;
  background:
    radial-gradient(42vw 40vw at 82% 6%,rgba(0,255,65,.30),transparent 62%),
    radial-gradient(38vw 36vw at 8% 30%,rgba(153,255,204,.20),transparent 64%),
    radial-gradient(46vw 38vw at 52% 98%,rgba(0,255,65,.15),transparent 68%);
  filter:blur(30px);
  animation:breathe 17s ease-in-out infinite;
}
@keyframes breathe{0%,100%{transform:scale(1);opacity:.72}50%{transform:scale(1.09);opacity:1}}
.top,main,.foot{position:relative;z-index:1}
a{color:var(--mint)}
img{max-width:100%;height:auto}
hr{border:0;height:2px;width:64px;margin:.7rem 0 1.2rem;border-radius:2px;
  background:linear-gradient(90deg,var(--neon),var(--mint) 60%,rgba(153,255,204,0))}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:6px}

/* 顶栏 */
.top{display:grid;grid-template-columns:1fr auto 1fr;
  grid-template-areas:"l b r" "d d d";align-items:center;gap:.7rem 1rem;
  padding:1rem clamp(1rem,4vw,2.4rem) 0}
.slot{grid-area:l}
.brand{grid-area:b;display:inline-flex;align-items:center;gap:.55rem;min-height:44px;
  text-decoration:none;color:var(--fg);font-weight:600;font-size:1.08rem;letter-spacing:.16em;
  transition:color .25s}
.brand img{width:36px;height:36px;border-radius:12px;object-fit:cover}
.brand span{padding-block:.2rem}
.brand:hover{color:var(--mint)}
.call{grid-area:r;justify-self:end;display:inline-flex;align-items:center;min-height:44px;
  padding:.45rem 1.15rem;border-radius:999px;border:1px solid var(--line);color:var(--mint);
  text-decoration:none;font-size:1rem;
  transition:background .25s,color .25s,border-color .25s}
.call:hover{background:var(--mint);color:var(--ink);border-color:var(--mint)}
.dock{grid-area:d}
.dock>summary{display:none;list-style:none;cursor:pointer;width:100%;min-height:44px;
  align-items:center;justify-content:center;gap:.45rem;border-radius:14px;
  border:1px solid var(--line);background:rgba(0,0,0,.25);color:var(--mint);
  font-size:1rem;letter-spacing:.22em}
.dock>summary::-webkit-details-marker{display:none}
.dock>summary::after{content:"＋";letter-spacing:0}
.dock[open]>summary::after{content:"－"}
.pills{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem;
  margin:.85rem 0 0;padding:0}
.pills a{display:inline-flex;align-items:center;min-height:42px;padding:.45rem 1.1rem;
  border-radius:999px;border:1px solid var(--line);background:rgba(0,30,60,.5);
  color:var(--dim);text-decoration:none;font-size:1rem;
  transition:transform .3s,background .3s,color .3s,border-color .3s}
.pills a:hover{color:var(--ink);background:var(--neon);border-color:var(--neon);transform:translateY(-2px)}

/* 主区 */
.wrap{display:grid;grid-template-columns:248px minmax(0,1fr);
  gap:clamp(1.2rem,3vw,2.6rem);max-width:var(--max);margin:0 auto;
  padding:clamp(1.6rem,3.5vw,2.6rem) clamp(1rem,4vw,2.4rem) 0;align-items:start}
.side{position:sticky;top:1.4rem;min-width:0}
.side-h{margin:0;font-size:1rem;font-weight:500;letter-spacing:.3em;color:var(--mint)}
.side hr{width:38px;margin:.7rem 0 0}
.toc{list-style:none;margin:1rem 0 0;padding:0;display:grid;gap:.1rem}
.toc a{display:flex;align-items:center;gap:.6rem;min-height:40px;padding:.25rem .1rem;
  color:var(--dim);text-decoration:none;font-size:1rem;
  border-bottom:1px solid rgba(153,255,204,.12)}
.toc a::before{content:"";flex:none;width:10px;height:2px;border-radius:2px;background:var(--neon);
  transition:width .3s}
.toc a:hover{color:var(--fg)}
.toc a:hover::before{width:24px}
.stage{min-width:0}

/* 首屏 */
.hero{position:relative;overflow:hidden;min-height:70vh;display:grid;
  align-content:center;justify-items:end;text-align:right;
  padding:clamp(2rem,6vw,4rem) 0 clamp(2.4rem,6vw,4rem)}
.hero .big{position:absolute;right:-.06em;bottom:-.08em;z-index:0;pointer-events:none;
  font-size:clamp(3rem,15vw,10rem);font-weight:700;line-height:.78;letter-spacing:-.05em;
  color:transparent;-webkit-text-stroke:1px rgba(153,255,204,.30);white-space:nowrap;
  animation:drift 12s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(-1.2%,-1.4%,0)}}
.hero h1{position:relative;z-index:1;margin:0;max-width:20ch;font-size:clamp(2.05rem,5.4vw,3.9rem);
  line-height:1.12;letter-spacing:-.02em;font-weight:600;color:var(--mint)}
@supports (-webkit-background-clip:text) or (background-clip:text){
  .hero h1{background:linear-gradient(96deg,#ffffff,var(--mint) 52%,var(--neon));
    -webkit-background-clip:text;background-clip:text;color:transparent}
}
.hero .lede{position:relative;z-index:1;margin:1.1rem 0 0;max-width:42ch;color:var(--dim);font-size:1.02rem}
.hero .cue{position:relative;z-index:1;margin-top:1.6rem;color:var(--neon);font-size:1.2rem;
  animation:cue 2.4s ease-in-out infinite}
@keyframes cue{0%,100%{transform:translateY(0)}50%{transform:translateY(6px)}}

/* 正文分节 */
div>article{position:relative;margin:0 0 1.4rem;padding:clamp(1.2rem,3vw,2.2rem);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;scroll-margin-top:1.6rem;
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.018))}
div>article::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
  background:linear-gradient(90deg,var(--neon),var(--mint),rgba(153,255,204,0));
  transform:scaleX(.28);transform-origin:left;
  transition:transform .7s cubic-bezier(.2,.8,.2,1)}
div>article:hover::after{transform:scaleX(1)}
div h2{margin:0;font-size:clamp(1.35rem,2.8vw,1.9rem);line-height:1.25;
  letter-spacing:-.01em;color:#f0fff8}
div h3{margin:1.4rem 0 .4rem;font-size:1.15rem;color:var(--mint)}
div p{margin:.9rem 0}
div ul,div ol{margin:.9rem 0;padding-left:1.35rem}
div li{margin:.35rem 0}
div strong{color:#fff}
div img{margin:.8rem 0;border-radius:18px;border:1px solid var(--line)}
div a{text-underline-offset:3px;text-decoration-color:rgba(0,255,65,.6)}

/* 页脚 */
.foot{max-width:var(--max);margin:clamp(3rem,7vw,5rem) auto 0;
  padding:clamp(2rem,4vw,3rem) clamp(1rem,4vw,2.4rem) 1.2rem;
  border-top:1px solid var(--line);display:grid;
  grid-template-columns:1.1fr 1fr 1.4fr;gap:clamp(1.2rem,3vw,2.4rem)}
.foot h2{margin:0;font-size:1.05rem;font-weight:500;letter-spacing:.24em;color:var(--mint)}
.foot hr{width:32px;margin:.6rem 0 .9rem}
.fmark{display:block;width:48px;height:48px;margin-bottom:.7rem;border-radius:16px;object-fit:cover}
.f-name{margin:0;font-size:1.05rem;font-weight:600;letter-spacing:.16em}
.f-list{list-style:none;margin:0;padding:0;display:grid;gap:.15rem}
.f-list a{display:inline-flex;align-items:center;min-height:40px;color:var(--dim);
  text-decoration:none;font-size:1rem}
.f-list a:hover{color:var(--neon)}
.sub{display:flex;flex-wrap:wrap;gap:.5rem}
.sub input{flex:1 1 150px;min-height:46px;padding:.5rem 1rem;border-radius:999px;
  border:1px solid var(--line);background:rgba(0,0,0,.3);color:var(--fg);
  font:inherit;font-size:1rem}
.sub input::placeholder{color:rgba(163,196,183,.8)}
.sub button{min-height:46px;padding:.5rem 1.4rem;border-radius:999px;border:1px solid var(--neon);
  background:rgba(0,255,65,.14);color:var(--mint);font:inherit;font-size:1rem;cursor:pointer;
  transition:background .25s,color .25s}
.sub button:hover{background:var(--neon);color:var(--ink)}
.legal{grid-column:1/-1;margin-top:.6rem;padding-top:.9rem;border-top:1px solid var(--line)}
.legal p{margin:0;font-size:1rem;color:var(--dim)}

/* 动效 */
.js .reveal{opacity:0;transform:translateY(22px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:860px){
  .wrap{grid-template-columns:1fr}
  .side{display:none}
  .foot{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .dock>summary{display:flex}
  .pills{flex-direction:column;gap:.4rem;margin-top:.7rem}
  .pills a{justify-content:flex-start;min-height:46px;padding-left:1rem;border-radius:16px}
  .hero{min-height:56vh;padding-top:1.5rem}
  .hero .big{font-size:24vw}
  .foot{grid-template-columns:1fr}
  .legal{grid-column:auto}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important}
  .js .reveal{opacity:1;transform:none}
}

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