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

:root{
  --g:#87ff71;
  --c:#01cdfe;
  --ink:#192617;
  --pink:#ff71ce;
  --violet:#b967ff;
  --bg:#0a120e;
  --txt:#e8f6e5;
  --dim:#9dbc9a;
  --line:rgba(135,255,113,.26);
  --hair:rgba(1,205,254,.3);
}

*{box-sizing:border-box}

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

body{
  margin:0;
  min-height:100vh;
  color:var(--txt);
  font-family:'Nunito Sans',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.78;
  background:
    radial-gradient(circle at 1px 1px, rgba(135,255,113,.14) 1px, transparent 1.7px) 0 0/24px 24px,
    radial-gradient(880px 520px at 82% -6%, rgba(255,113,206,.28), transparent 62%),
    radial-gradient(720px 480px at 4% 2%, rgba(1,205,254,.22), transparent 64%),
    linear-gradient(180deg,#101d16 0%,#0a120e 56%,#192617 100%);
  background-attachment:fixed,fixed,fixed,fixed;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:70;
  pointer-events:none;
  opacity:.42;
  mix-blend-mode:overlay;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.05) 0 1px,transparent 1px 3px);
}

::selection{background:var(--g);color:var(--ink)}

a{color:var(--c)}

:focus-visible{outline:2px solid var(--g);outline-offset:2px}

.pip{
  width:8px;
  height:8px;
  flex:0 0 auto;
  background:var(--c);
  transform:rotate(45deg);
  box-shadow:0 0 8px var(--c);
}

/* ---------- 顶栏 ---------- */
.bar{
  position:sticky;
  top:0;
  z-index:50;
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 12px;
  border-bottom:1px solid var(--line);
  background:rgba(9,17,13,.86);
  backdrop-filter:blur(9px);
}

.mark{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  text-decoration:none;
  color:var(--g);
  font-family:'Rubik',sans-serif;
  font-size:19px;
  font-weight:700;
  border:1px solid var(--g);
  background:linear-gradient(180deg,rgba(135,255,113,.16),rgba(135,255,113,.02));
  text-shadow:0 0 10px rgba(135,255,113,.8);
}

.mark img{width:26px;height:26px;object-fit:contain;display:block}

.rail{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  gap:8px;
  padding:2px;
  overflow-x:auto;
  scrollbar-width:thin;
  scrollbar-color:var(--c) transparent;
  -webkit-overflow-scrolling:touch;
}

.rail::-webkit-scrollbar{height:3px}
.rail::-webkit-scrollbar-thumb{background:var(--hair)}

.chip{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:40px;
  padding:0 12px;
  font-size:16px;
  color:var(--txt);
  text-decoration:none;
  border:1px solid rgba(1,205,254,.32);
  background:rgba(1,205,254,.07);
  white-space:nowrap;
  transition:color .18s,border-color .18s,background .18s,transform .18s;
}

.chip:hover,.chip:focus-visible,.chip.on{
  color:var(--g);
  border-color:var(--g);
  background:rgba(135,255,113,.1);
  transform:translateY(-1px);
}

.chip:hover .pip,.chip.on .pip{background:var(--g);box-shadow:0 0 10px var(--g)}

.say{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:40px;
  padding:0 11px;
  font-size:16px;
  color:var(--ink);
  text-decoration:none;
  font-family:'Rubik',sans-serif;
  font-weight:600;
  background:var(--g);
  border:1px solid var(--g);
}

.say .pip{background:var(--ink);box-shadow:none}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  min-height:70vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  padding:clamp(26px,6vw,54px) 18px clamp(18px,3vw,30px);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(255,113,206,.16),transparent 46%);
  filter:hue-rotate(-8deg);
}

.brand-line{
  position:relative;
  margin:0 0 14px;
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:'Rubik',sans-serif;
  font-size:13px;
  letter-spacing:.26em;
  color:var(--g);
  text-shadow:0 0 10px rgba(135,255,113,.5);
}

.hero h1{
  position:relative;
  margin:0 0 22px;
  max-width:15em;
  font-family:'Rubik',sans-serif;
  font-weight:700;
  font-size:clamp(29px,6.6vw,58px);
  line-height:1.16;
  letter-spacing:.01em;
  color:#f5fff3;
  text-shadow:0 0 14px rgba(135,255,113,.55),0 0 42px rgba(1,205,254,.4),2px 2px 0 rgba(255,113,206,.35);
}

.sun{
  position:relative;
  margin:auto auto 0;
  width:min(100%,560px);
  aspect-ratio:2/1;
  overflow:hidden;
  border:1px solid rgba(135,255,113,.34);
  background:linear-gradient(180deg,rgba(255,113,206,.12),rgba(25,38,23,.94));
}

.sun .orb{
  position:absolute;
  left:50%;
  top:16%;
  transform:translateX(-50%);
  width:42%;
  aspect-ratio:1;
  border-radius:50%;
  background:linear-gradient(180deg,#ff71ce,#b967ff 54%,#01cdfe);
  box-shadow:0 0 46px rgba(255,113,206,.55);
  opacity:.9;
}

.sun .grid{
  position:absolute;
  inset:auto 0 0;
  height:50%;
  background:
    repeating-linear-gradient(90deg,rgba(1,205,254,.5) 0 1px,transparent 1px 32px),
    repeating-linear-gradient(0deg,rgba(1,205,254,.42) 0 1px,transparent 1px 21px);
  transform:perspective(190px) rotateX(62deg);
  transform-origin:bottom center;
  opacity:.72;
}

.hero-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.55;
  mix-blend-mode:screen;
}

/* ---------- 主体 ---------- */
main{display:block}

.shell{
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  gap:clamp(18px,3vw,40px);
  max-width:1120px;
  margin:0 auto;
  padding:clamp(24px,4vw,46px) 16px clamp(38px,6vw,70px);
}

.side{
  align-self:start;
  position:sticky;
  top:74px;
  padding:16px 15px;
  border:1px solid var(--hair);
  border-left:3px solid var(--c);
  background:linear-gradient(180deg,rgba(1,205,254,.09),rgba(25,38,23,.5));
}

.side small{
  display:block;
  font-family:'Rubik',sans-serif;
  font-size:12px;
  letter-spacing:.28em;
  color:var(--g);
  margin-bottom:4px;
}

.side h2{
  margin:0 0 12px;
  font-family:'Rubik',sans-serif;
  font-size:19px;
  line-height:1.4;
  color:#f0fff8;
  text-shadow:0 0 12px rgba(1,205,254,.45);
}

.side-list{list-style:none;margin:0;padding:0;display:grid;gap:2px}

.side-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:0 2px 0 14px;
  position:relative;
  font-size:16px;
  color:var(--txt);
  text-decoration:none;
  border-bottom:1px dashed rgba(135,255,113,.16);
}

.side-list a::before{
  content:"";
  position:absolute;
  left:0;
  width:6px;
  height:6px;
  background:var(--c);
  transform:rotate(45deg);
}

.side-list a:hover{color:var(--g)}
.side-list a:hover::before{background:var(--g)}

.prose{max-width:760px;min-width:0}

.prose section{
  padding:clamp(18px,3vw,30px) 0;
  scroll-margin-top:78px;
  border-bottom:1px dashed rgba(135,255,113,.18);
}

.prose section:last-child{border-bottom:0;padding-bottom:0}

.prose small{
  display:block;
  font-family:'Rubik',sans-serif;
  font-size:12.5px;
  letter-spacing:.26em;
  color:var(--g);
  margin-bottom:2px;
  text-shadow:0 0 8px rgba(135,255,113,.4);
}

.prose h2,.prose h3{
  font-family:'Rubik',sans-serif;
  line-height:1.3;
  color:#effff3;
  text-shadow:0 0 13px rgba(1,205,254,.4);
}

.prose h2{font-size:clamp(21px,3.3vw,29px);margin:.1em 0 .55em}
.prose h3{font-size:clamp(18px,2.4vw,21px);margin:1.3em 0 .4em}

.prose p{margin:0 0 1em}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.25em}
.prose li{margin:.3em 0}
.prose li::marker{color:var(--g)}

.prose a{color:var(--c);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--g)}

.prose blockquote{
  margin:1.2em 0;
  padding:12px 16px;
  border-left:3px solid var(--pink);
  background:rgba(255,113,206,.08);
  color:#f6e9f6;
}

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

.prose img{
  max-width:100%;
  height:auto;
  border:1px solid var(--line);
  display:block;
  margin:1em 0;
}

.prose figure{margin:1.2em 0}
.prose figcaption{font-size:15px;color:var(--dim);margin-top:6px}

.prose code{
  font-family:ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  font-size:.94em;
  background:rgba(1,205,254,.12);
  padding:1px 5px;
}

.prose hr{border:0;border-top:1px dashed rgba(135,255,113,.24);margin:1.6em 0}

.prose time{
  font-family:'Rubik',sans-serif;
  font-size:14px;
  letter-spacing:.08em;
  color:var(--dim);
}

/* ---------- 页脚 ---------- */
.foot{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#101c15,#080f0b);
  padding:0 16px;
}

.foot-cta{
  max-width:1120px;
  margin:0 auto;
  display:grid;
  justify-items:center;
  gap:16px;
  text-align:center;
  padding:clamp(28px,5vw,52px) 0;
  border-bottom:1px dashed rgba(135,255,113,.2);
}

.foot-cta .big{
  margin:0;
  font-family:'Rubik',sans-serif;
  font-weight:700;
  font-size:clamp(21px,4.6vw,38px);
  line-height:1.2;
  color:#f7fff5;
  text-shadow:0 0 16px rgba(255,113,206,.5),0 0 34px rgba(1,205,254,.35);
}

.cta{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:48px;
  padding:0 26px;
  font-family:'Rubik',sans-serif;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--ink);
  background:var(--g);
  border:1px solid var(--g);
  text-decoration:none;
}

.cta .pip{background:var(--ink);box-shadow:none}
.cta:hover{background:var(--c);border-color:var(--c)}

.foot-main{
  max-width:1120px;
  margin:0 auto;
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr;
  gap:26px;
  padding:26px 0;
}

.foot-nav dl{margin:0;display:grid;gap:2px}
.foot-nav dt{
  font-family:'Rubik',sans-serif;
  font-size:12.5px;
  letter-spacing:.24em;
  color:var(--g);
  margin-top:8px;
}
.foot-nav dt:first-child{margin-top:0}
.foot-nav dd{margin:0}

.foot-nav a,
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  color:var(--txt);
  text-decoration:none;
  border-bottom:1px solid transparent;
}

.foot-nav a:hover,
.foot-links a:hover{color:var(--g);border-bottom-color:var(--g)}

.foot-main address{
  font-style:normal;
  font-family:'Rubik',sans-serif;
  font-size:17px;
  line-height:1.6;
  color:var(--c);
  letter-spacing:.04em;
  border-left:2px solid var(--hair);
  padding-left:12px;
}

.foot-links{list-style:none;margin:0;padding:0;display:grid;align-content:start;gap:2px}

.copy{
  max-width:1120px;
  margin:0 auto;
  padding:16px 0 22px;
  text-align:center;
  font-size:14.5px;
  letter-spacing:.1em;
  color:var(--dim);
  border-top:1px solid rgba(135,255,113,.12);
}

/* ---------- 动效 ---------- */
.rv{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s ease,transform .62s ease;
}

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

.rail .chip{animation:crawl .5s ease both}
.rail .chip:nth-child(2){animation-delay:.05s}
.rail .chip:nth-child(3){animation-delay:.1s}
.rail .chip:nth-child(4){animation-delay:.15s}
.rail .chip:nth-child(5){animation-delay:.2s}
.rail .chip:nth-child(6){animation-delay:.25s}
.rail .chip:nth-child(7){animation-delay:.3s}

@keyframes crawl{
  from{opacity:0;transform:translateY(-6px)}
  to{opacity:1;transform:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .rail .chip{animation:none}
  .chip:hover{transform:none}
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .side{position:static;top:auto}
  .side-list{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:4px 12px}
  .side-list a{padding-left:12px;border-bottom:0}
  .prose{max-width:none}
  .foot-main{grid-template-columns:1fr 1fr}
  .foot-nav{grid-column:1 / -1}
  .foot-nav dl{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}
}

@media (max-width:600px){
  body{font-size:16.5px}
  .bar{padding:8px 10px;gap:8px}
  .hero{min-height:62vh;padding-top:22px}
  .hero h1{margin-bottom:18px}
  .brand-line{letter-spacing:.2em}
  .foot-main{grid-template-columns:1fr;gap:16px}
  .foot-nav dl{grid-template-columns:1fr}
  .foot-main address{border-left:0;border-top:2px solid var(--hair);padding:10px 0 0}
  .copy{font-size:14px}
}

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