@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@300;400;600;700&family=Orbitron:wght@500;600;700&display=swap');

:root{
--mint:#99ffcc;
--neon:#00ff41;
--ink:#001e3c;
--ink2:#012a52;
--ink3:#01406b;
--text:#e3f6ef;
--dim:#9dc2cb;
--line:rgba(153,255,204,.16);
--cap:999px;
--r:4px;
--wrap:1160px;
--fd:"Orbitron","Exo 2",system-ui,-apple-system,"Segoe UI",sans-serif;
--fb:"Exo 2",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-color:var(--ink);
background-image:
radial-gradient(62vw 52vw at 86% -6%,rgba(0,255,65,.14),rgba(0,255,65,0) 62%),
radial-gradient(52vw 46vw at 3% 32%,rgba(153,255,204,.11),rgba(153,255,204,0) 66%);
background-repeat:no-repeat;
background-attachment:fixed;
color:var(--text);
font-family:var(--fb);
font-size:17px;
line-height:1.72;
overflow-x:hidden;
}

img{max-width:100%;display:block}
a{color:var(--mint)}
h1,h2,h3,h4{font-family:var(--fd);font-weight:600;line-height:1.26;text-wrap:balance;overflow-wrap:break-word}

:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:2px}

.skip{
position:absolute;left:12px;top:-60px;z-index:60;
background:var(--neon);color:#00220f;text-decoration:none;
padding:10px 16px;border-radius:var(--cap);font-size:16px;
transition:top .2s ease;
}
.skip:focus{top:12px}

/* 顶部 */
.top{
position:sticky;top:0;z-index:40;
display:flex;align-items:center;gap:14px;
padding:10px 18px;
background:rgba(0,22,44,.84);
-webkit-backdrop-filter:blur(14px);
backdrop-filter:blur(14px);
border-bottom:1px solid var(--line);
}
.brand{
display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;
min-height:44px;text-decoration:none;
color:var(--mint);font-family:var(--fd);font-size:16px;letter-spacing:.06em;
}
.brand-img{width:30px;height:30px;border-radius:50%;object-fit:cover}
.brand-mark{
width:30px;height:30px;border-radius:50%;
background:conic-gradient(from 40deg,var(--neon),var(--mint),#00663a,var(--neon));
box-shadow:0 0 0 1px rgba(153,255,204,.45),0 0 18px rgba(0,255,65,.42);
animation:breathe 8s ease-in-out infinite;
}
.brand:hover{color:#eafff5}

.menu{margin-left:auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.menu::-webkit-scrollbar{display:none}
.menu p{display:flex;gap:8px;margin:0;padding:2px 0}
.menu a{
display:inline-flex;align-items:center;min-height:40px;
padding:8px 15px;border-radius:var(--cap);
background:rgba(153,255,204,.09);
color:var(--mint);text-decoration:none;font-size:16px;white-space:nowrap;
transition:background .25s ease,color .25s ease,transform .25s ease;
}
.menu a:hover,.menu a:focus-visible{background:var(--mint);color:#00281a;transform:translateY(-2px)}

/* 首屏 */
.hero{
max-width:var(--wrap);margin:0 auto;
padding:26px 18px 0;min-height:45vh;
display:flex;flex-direction:column;gap:18px;
}
.hero-copy{display:flex;flex-direction:column;gap:14px;align-items:flex-start}

.badge{
display:inline-flex;align-items:center;align-self:flex-start;
margin:0;padding:7px 16px 7px 14px;border-radius:var(--cap);
background:rgba(0,255,65,.13);color:var(--neon);
font-family:var(--fd);font-size:16px;font-weight:500;letter-spacing:.1em;
box-shadow:0 0 26px rgba(0,255,65,.18);
}
.badge span{display:inline-flex;align-items:center;gap:9px}
.badge span::before{
content:"";width:8px;height:8px;border-radius:50%;
background:var(--neon);box-shadow:0 0 10px var(--neon);
animation:breathe 4.5s ease-in-out infinite;
}

.hero h1{
margin:0;font-size:clamp(27px,5.6vw,46px);
letter-spacing:.01em;color:#f2fffa;
}
.lede{margin:0;max-width:50ch;color:#b7d8ce;font-size:17px}

.hero-art{
position:relative;isolation:isolate;
margin:4px 0 0;height:clamp(140px,24vh,238px);
border-radius:var(--r);overflow:hidden;
background:linear-gradient(118deg,#00294c,#01406b 56%,#005e3c);
}
.blob{
position:absolute;border-radius:50%;
filter:blur(34px);opacity:.62;
translate:0 var(--py,0px);
transition:translate .3s linear;
}
.b1{
width:54%;height:150%;left:-9%;top:-32%;
background:radial-gradient(circle at 42% 42%,var(--neon),rgba(0,255,65,0) 70%);
animation:breathe 9s ease-in-out infinite;
}
.b2{
width:48%;height:132%;right:-7%;bottom:-32%;
background:radial-gradient(circle at 58% 48%,var(--mint),rgba(153,255,204,0) 70%);
animation:breathe 12s ease-in-out infinite reverse;
}
.hero-img{
position:relative;z-index:2;width:100%;height:100%;
object-fit:cover;opacity:.93;
}

/* 正文交错栏 */
.stage{
max-width:var(--wrap);margin:0 auto;
padding:34px 18px 18px;
display:grid;grid-template-columns:minmax(0,1fr) 266px;
gap:44px;align-items:start;
}
.prose{min-width:0;max-width:72ch}

.prose section{
padding-top:28px;margin-top:32px;
border-top:1px solid var(--line);
scroll-margin-top:96px;
}
.prose section:first-child{padding-top:0;margin-top:0;border-top:0}
.prose section:target{border-top-color:rgba(0,255,65,.6)}

.prose h2{
margin:0 0 14px;font-size:clamp(21px,2.8vw,27px);
color:var(--mint);
}
.prose h2 > span,.prose h3 > span{
display:inline-block;position:relative;padding-left:15px;
}
.prose h2 > span::before,.prose h3 > span::before{
content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;
border-radius:2px;background:linear-gradient(var(--neon),var(--mint));
}
.prose h3{margin:26px 0 10px;font-size:19px;color:#d8ffef}
.prose h4{margin:20px 0 8px;font-size:17px;color:#cdeee3}

.prose p{margin:0 0 14px}
.prose strong{color:#ffffff}
.prose a{
color:var(--neon);text-decoration:underline;
text-decoration-style:dotted;text-underline-offset:3px;
word-break:break-word;
}
.prose a:hover{color:var(--mint)}
.prose ul,.prose ol{margin:0 0 14px;padding-left:1.25em}
.prose li{margin:6px 0}
.prose figure{margin:20px 0;border-radius:var(--r);overflow:hidden}
.prose img{border-radius:var(--r)}
.prose blockquote{
margin:20px 0;padding:14px 18px;
background:var(--ink2);border-left:3px solid var(--neon);
border-radius:var(--r);color:#cfeade;
}
.prose table{width:100%;border-collapse:collapse;font-size:16px;margin:16px 0}
.prose th,.prose td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line)}
.prose th{color:var(--mint);font-family:var(--fd);font-weight:500}

/* 侧栏 */
.rail{
position:sticky;top:92px;
background:var(--ink2);border-radius:var(--r);
padding:18px 16px;
box-shadow:inset 0 1px 0 rgba(153,255,204,.16);
}
.rail h2{
margin:0 0 10px;font-family:var(--fd);font-size:16px;
font-weight:500;letter-spacing:.14em;color:var(--neon);
}
.rail-list{display:grid}
.rail-list a{
display:flex;align-items:center;min-height:40px;padding:4px 2px;
color:#c7e9dd;text-decoration:none;font-size:16px;
border-bottom:1px dashed rgba(153,255,204,.16);
transition:color .2s ease,padding-left .2s ease;
}
.rail-list a:last-child{border-bottom:0}
.rail-list a:hover,.rail-list a:focus-visible{color:var(--neon);padding-left:8px}

/* 页脚 */
.foot{
max-width:var(--wrap);margin:26px auto 0;
padding:22px 18px 40px;border-top:1px solid var(--line);
display:flex;flex-wrap:wrap;gap:8px 18px;
align-items:center;justify-content:space-between;
}
.foot p{margin:0;font-family:var(--fd);font-size:16px;color:var(--mint);letter-spacing:.05em}
.foot small{font-size:16px;color:var(--dim)}
.foot small a{
display:inline-flex;align-items:center;min-height:40px;padding:6px 2px;
color:var(--mint);text-decoration:none;
}
.foot small a:hover{color:var(--neon)}

@keyframes breathe{
0%,100%{transform:scale(1);opacity:.58}
50%{transform:scale(1.13);opacity:.92}
}

@media (max-width:880px){
.stage{grid-template-columns:minmax(0,1fr);gap:30px;padding-top:26px}
.prose{max-width:none}
.rail{position:static}
}

@media (max-width:600px){
.top{padding:8px 12px;gap:10px}
.menu a{padding:8px 12px}
.hero{padding:20px 14px 0;gap:14px}
.stage,.foot{padding-left:14px;padding-right:14px}
.prose section{scroll-margin-top:86px}
.hero-art{height:clamp(130px,22vh,190px)}
}

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

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