@import url('https://fonts.googleapis.com/css2?family=Calistoga:ital@0;1&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --ink:#001e3c;
  --deep:#00121f;
  --mint:#99ffcc;
  --neon:#00ff41;
  --text:#d9f4ea;
  --muted:#88b3ab;
  --line:rgba(153,255,204,.16);
  --pad:clamp(16px,4vw,48px);
  --rail:236px;
  --r:4px;
  --shadow:0 22px 44px -26px rgba(0,0,0,.95);
}

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

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

body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(circle at 90% -10%,rgba(0,255,65,.16),transparent 44%),
    radial-gradient(circle at 4% 8%,rgba(153,255,204,.12),transparent 40%),
    radial-gradient(circle at 62% 112%,rgba(0,255,65,.1),transparent 56%),
    var(--deep);
  color:var(--text);
  font-family:Inter,"Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.68;
  overflow-x:clip;
}

h1,h2,h3,h4{
  margin:0;
  font-family:Calistoga,Georgia,"Noto Serif SC",serif;
  font-weight:400;
  line-height:1.16;
  color:var(--mint);
  letter-spacing:.01em;
}

a{color:var(--mint);text-decoration:none}
a:hover{color:var(--neon)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--neon);outline-offset:2px}

img{max-width:100%}

.skip{
  position:absolute;left:14px;top:-70px;z-index:60;
  padding:10px 16px;border-radius:var(--r);
  background:var(--neon);color:var(--ink);font-weight:600;
  transition:top .25s ease;
}
.skip:focus{top:14px;color:var(--ink)}

/* ---- 侧栏 ---- */
.rail{
  position:fixed;inset:0 auto 0 0;width:var(--rail);z-index:20;
  display:flex;flex-direction:column;gap:20px;
  padding:22px 18px 26px;
  background:linear-gradient(180deg,rgba(0,30,60,.95),rgba(0,18,31,.98));
  border-right:1px solid var(--line);
  overflow-y:auto;
  overscroll-behavior:contain;
}

.logo{
  display:inline-flex;align-items:center;justify-content:center;
  width:50px;height:50px;min-height:50px;border-radius:var(--r);
  background:linear-gradient(145deg,var(--mint),rgba(0,255,65,.4));
  box-shadow:0 0 26px -6px rgba(0,255,65,.75);
  transition:transform .3s ease,box-shadow .3s ease;
}
.logo:hover{transform:translateY(-2px) scale(1.04);box-shadow:0 0 32px -2px rgba(0,255,65,.9)}
.logo-img{width:34px;height:34px;object-fit:contain;display:block;border-radius:2px}
.logo-txt{font-family:Calistoga,serif;font-size:18px;color:var(--ink);letter-spacing:.05em}

.rail-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.rail-list > li{animation:rise .55s ease both}
.rail-list > li:nth-child(2){animation-delay:.08s}
.rail-list > li:nth-child(3){animation-delay:.16s}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.rail-cap{
  display:block;margin-bottom:5px;
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:11.5px;letter-spacing:.24em;color:var(--muted);
}

.rail-nav a{
  display:flex;align-items:center;min-height:42px;
  padding:7px 11px;border:1px solid transparent;border-radius:var(--r);
  color:var(--text);font-size:15.5px;line-height:1.35;
  transition:background .25s ease,color .25s ease,transform .25s ease,border-color .25s ease;
}
.rail-nav a:hover{background:rgba(153,255,204,.09);border-color:var(--line);color:var(--mint);transform:translateX(3px)}
.rail-nav a.is-current{background:rgba(0,255,65,.13);border-color:rgba(0,255,65,.38);color:var(--neon)}

.rail-sub{
  list-style:none;margin:0;padding:0 0 0 12px;
  display:grid;gap:3px;
  border-left:1px solid var(--line);
  max-height:0;opacity:0;transform:translateY(-4px);overflow:hidden;
  transition:max-height .4s ease,opacity .3s ease,transform .3s ease;
}
.rail-group:hover .rail-sub,
.rail-group:focus-within .rail-sub{max-height:260px;opacity:1;transform:none}

.rail-foot{margin-top:auto}
.contact{
  display:inline-flex;align-items:center;min-height:42px;
  padding:0 14px;border:1px solid rgba(0,255,65,.4);border-radius:var(--r);
  background:rgba(0,255,65,.08);color:var(--neon);font-size:15px;
  transition:background .25s ease,transform .25s ease;
}
.contact:hover{background:rgba(0,255,65,.18);transform:translateY(-2px)}

/* ---- 主体 ---- */
.main{margin-left:var(--rail);min-width:0}
.wrap{max-width:1180px;margin:0 auto;padding:clamp(16px,3vw,34px) var(--pad) 0}

.hero{
  position:relative;overflow:hidden;
  margin:0 calc(-1 * var(--pad));
  min-height:min(45vh,440px);
  display:flex;flex-direction:column;justify-content:flex-end;align-items:flex-end;
  padding:clamp(20px,5vw,46px);
  border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(160deg,#002c4c,#00121f);
  box-shadow:var(--shadow);
}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.62;filter:saturate(1.18) contrast(1.06)}
.hero-veil{
  position:absolute;inset:0;
  background:
    linear-gradient(256deg,rgba(0,18,31,.96) 6%,rgba(0,30,60,.42) 54%,rgba(0,18,31,.92)),
    radial-gradient(circle at 82% 78%,rgba(0,255,65,.22),transparent 52%);
}
.hero-blobs{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.hero-blobs span{position:absolute;border-radius:50%;filter:blur(46px);opacity:.5;animation:breathe 12s ease-in-out infinite}
.hero-blobs span:nth-child(1){width:220px;height:220px;left:-50px;top:-70px;background:var(--neon)}
.hero-blobs span:nth-child(2){width:280px;height:280px;right:4%;bottom:-110px;background:var(--mint);opacity:.32;animation-delay:-4s}
.hero-blobs span:nth-child(3){width:170px;height:170px;left:44%;top:8%;background:#00c8a0;opacity:.28;animation-delay:-8s}
@keyframes breathe{0%,100%{transform:scale(1) translateY(0)}50%{transform:scale(1.24) translateY(-16px)}}

.hero-copy{position:relative;z-index:2;text-align:right;max-width:min(680px,94%)}
.hero h1{font-size:clamp(30px,5.2vw,58px);color:#edfff7;text-shadow:0 8px 34px rgba(0,0,0,.65)}
.hero-sub{margin:12px 0 0;color:#bfe6da;font-size:16px;line-height:1.6}

.hero-band{
  position:absolute;left:0;right:0;bottom:0;height:10px;z-index:3;
  background:linear-gradient(90deg,var(--neon),var(--mint) 46%,rgba(153,255,204,0));
  clip-path:polygon(0 58%,100% 0,100% 100%,0 100%);
}

.masthead{padding:34px 0 4px}
.masthead h2{font-size:clamp(20px,2.6vw,28px);letter-spacing:.05em}
.masthead hr{
  border:0;height:2px;width:88px;margin:14px 0 0;border-radius:2px;
  background:linear-gradient(90deg,var(--neon),rgba(153,255,204,0));
}

.prose{max-width:74ch;padding-bottom:clamp(40px,7vw,72px)}
.prose div{
  padding:clamp(22px,3.6vw,38px) 0;
  border-top:1px solid var(--line);
  scroll-margin-top:16px;
}
.prose div:first-child{border-top:0;padding-top:clamp(14px,2vw,20px)}
.prose h2{font-size:clamp(22px,3vw,30px)}
.prose h3{font-size:clamp(18px,2.2vw,22px);color:#c9ffe6;margin-top:24px}
.prose p{margin:12px 0;color:#cfe9e2}
.prose ul,.prose ol{margin:14px 0;padding-left:1.25em;color:#cfe9e2}
.prose li{margin:8px 0}
.prose li::marker{color:var(--neon)}
.prose strong{color:#edfff7}
.prose a{border-bottom:1px solid rgba(153,255,204,.42)}
.prose blockquote{
  margin:20px 0;padding:14px 18px;
  border-left:3px solid var(--neon);border-radius:var(--r);
  background:rgba(0,255,65,.06);color:#e2f8f0;
}
.prose img{border-radius:var(--r);height:auto}
.prose table{width:100%;border-collapse:collapse;font-size:15.5px;margin:16px 0}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.prose hr{border:0;height:2px;width:72px;margin:16px 0;background:linear-gradient(90deg,rgba(0,255,65,.7),transparent)}
.prose code{
  font-family:"JetBrains Mono",ui-monospace,monospace;font-size:.92em;
  background:rgba(0,255,65,.1);padding:.12em .38em;border-radius:2px;color:#d6ffe9;
}

/* ---- 页脚 ---- */
.foot{
  margin-left:var(--rail);
  display:grid;grid-template-columns:auto 1fr minmax(200px,auto) auto;
  align-items:center;gap:16px 26px;
  padding:22px var(--pad) 32px;
  border-top:1px solid var(--line);
  background:rgba(0,18,31,.72);
  font-size:14.5px;
}
.foot-brand a{
  display:inline-flex;align-items:center;gap:9px;min-height:40px;
  font-family:Calistoga,serif;font-size:17px;color:var(--mint);
}
.foot-dot{
  width:8px;height:8px;border-radius:50%;background:var(--neon);
  box-shadow:0 0 12px var(--neon);animation:breathe 6s ease-in-out infinite;
}
.foot-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px 10px}
.foot-nav a{display:inline-flex;align-items:center;min-height:40px;padding:0 5px;color:#a9cfc6;font-size:14.5px;transition:color .2s ease}
.foot-nav a:hover{color:var(--neon)}

.sub{display:flex;gap:6px}
.sub input{
  min-height:40px;width:100%;min-width:0;padding:0 11px;
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(0,255,65,.05);color:var(--text);
  font:inherit;font-size:14.5px;
}
.sub input::placeholder{color:var(--muted)}
.sub button{
  min-height:40px;padding:0 16px;border:0;border-radius:var(--r);cursor:pointer;
  background:linear-gradient(135deg,var(--mint),var(--neon));
  color:var(--ink);font:600 14.5px Inter,sans-serif;
  transition:transform .2s ease,box-shadow .2s ease;
}
.sub button:hover{transform:translateY(-2px);box-shadow:0 12px 24px -14px var(--neon)}
.sub button:disabled{opacity:.72;cursor:default;transform:none;box-shadow:none}
.foot-copy{color:var(--muted);font-size:13.5px}

@media (max-width:1080px){
  .foot{grid-template-columns:auto 1fr auto;grid-template-areas:"b n c" "f f f"}
  .foot-brand{grid-area:b}
  .foot-nav{grid-area:n}
  .foot-form{grid-area:f}
  .foot-copy{grid-area:c;white-space:nowrap}
}

@media (max-width:900px){
  :root{--pad:16px}
  .rail{
    position:static;width:auto;inset:auto;
    padding:14px 16px 16px;gap:14px;
    border-right:0;border-bottom:1px solid var(--line);
  }
  .rail-list{display:grid;grid-template-columns:1fr;gap:12px}
  .rail-nav a{min-height:44px}
  .rail-sub{max-height:none;opacity:1;transform:none}
  .rail-foot{margin-top:2px}
  .contact{min-height:44px}
  .main,.foot{margin-left:0}
  .hero{min-height:44vh;align-items:flex-end}
  .hero-copy{max-width:100%}
  .foot{grid-template-columns:1fr;grid-template-areas:"b" "n" "f" "c";gap:10px;padding:20px 16px 28px}
  .foot-copy{white-space:normal}
  .prose{max-width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .rail-sub{max-height:none;opacity:1;transform:none}
}

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