@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@700&display=swap');

:root{
  --neon:#87ff71;
  --cyan:#01cdfe;
  --ink:#192617;
  --deep:#0b120c;
  --pink:#ff71ce;
  --line:#2d4632;
  --txt:#d9f7d2;
  --disp:'Space Grotesk',ui-sans-serif,system-ui,'Segoe UI',sans-serif;
  --body:ui-sans-serif,system-ui,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--txt);
  font-family:var(--body);
  font-size:17px;
  line-height:1.72;
  overflow-x:hidden;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:60;
  pointer-events:none;
  opacity:.42;
  background:repeating-linear-gradient(180deg,rgba(6,14,8,.55) 0 1px,rgba(6,14,8,0) 1px 3px);
}
img{max-width:100%;height:auto}
menu{margin:0;padding:0;list-style:none}
a{color:var(--neon)}
:focus-visible{outline:3px solid var(--cyan);outline-offset:2px}

/* ---------- 顶部两行：品牌行 + 菜单行 ---------- */
.top{
  position:sticky;
  top:0;
  z-index:50;
  padding:10px clamp(14px,4vw,42px) 12px;
  background:rgba(11,18,12,.94);
  border-bottom:2px solid var(--neon);
  box-shadow:0 6px 0 rgba(1,205,254,.18);
}
.brand{
  margin:0 0 8px;
  font-family:var(--disp);
  font-size:clamp(24px,5.2vw,36px);
  line-height:1.08;
  letter-spacing:.04em;
}
.brand a{
  color:var(--neon);
  text-decoration:none;
  text-shadow:0 0 20px rgba(135,255,113,.55);
}
.drawer summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  padding:6px 16px;
  border:2px solid var(--cyan);
  border-radius:10px;
  color:var(--cyan);
  font-family:var(--disp);
  font-size:16px;
  letter-spacing:.08em;
  user-select:none;
}
.drawer summary::-webkit-details-marker{display:none}
.drawer summary::after{content:"＋";font-size:15px}
.drawer[open] summary::after{content:"－"}
.chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:12px 0 2px;
}
.chips a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 14px;
  border:2px solid var(--line);
  border-radius:10px;
  color:#cdf6c6;
  text-decoration:none;
  font-size:16px;
  transition:background-color .16s linear,color .16s linear,border-color .16s linear;
}
.chips a:hover,.chips a:focus-visible{
  border-color:var(--neon);
  background:var(--neon);
  color:#0a1208;
}

/* ---------- Hero：落日网格 + 斜切底边 ---------- */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  min-height:70vh;
  padding:clamp(26px,6vw,64px) clamp(16px,5vw,58px) clamp(64px,11vw,116px);
  overflow:hidden;
  isolation:isolate;
  background:radial-gradient(130% 90% at 16% 102%,#ff71ce 0%,#01cdfe 40%,#192617 79%);
  clip-path:polygon(0 0,100% 0,100% 90%,0 100%);
}
.hero::before{
  content:"";
  position:absolute;
  left:-25%;
  right:-25%;
  bottom:-8%;
  height:58%;
  z-index:0;
  background-image:
    linear-gradient(rgba(19,42,26,.55) 1px,transparent 1px),
    linear-gradient(90deg,rgba(19,42,26,.45) 1px,transparent 1px);
  background-size:64px 42px;
  transform:perspective(340px) rotateX(66deg);
  transform-origin:bottom center;
  opacity:.55;
  pointer-events:none;
}
.ghost{
  position:absolute;
  left:-2vw;
  bottom:8%;
  z-index:1;
  font-family:var(--disp);
  font-size:clamp(64px,19vw,210px);
  line-height:.78;
  letter-spacing:-.04em;
  white-space:nowrap;
  color:rgba(14,32,18,.26);
  pointer-events:none;
  will-change:transform;
}
.hero-in{position:relative;z-index:3;max-width:760px}
.hero h1{
  margin:0;
  font-family:var(--disp);
  font-size:clamp(30px,7.4vw,64px);
  line-height:1.04;
  letter-spacing:-.01em;
  color:#08110a;
  text-shadow:0 0 22px rgba(135,255,113,.9),3px 3px 0 rgba(255,255,255,.55);
  overflow-wrap:break-word;
}
.lede{
  max-width:54ch;
  margin:16px 0 0;
  font-size:17px;
  font-weight:600;
  color:#0a150c;
}
.hero-media{
  position:relative;
  z-index:2;
  margin-top:24px;
  width:min(520px,100%);
  border:3px solid var(--ink);
  border-radius:10px;
  overflow:hidden;
  background:var(--deep);
}
.hero-media img{display:block;width:100%;height:auto}

/* ---------- 正文 + 右侧栏 ---------- */
.sheet{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:clamp(22px,4vw,48px);
  align-items:start;
  max-width:1180px;
  margin:clamp(38px,7vw,74px) auto 0;
  padding:0 clamp(16px,4vw,40px);
}
.prose{min-width:0;overflow-wrap:break-word}
.prose div{
  padding:clamp(24px,4vw,46px) 0;
  border-top:2px dashed var(--line);
  scroll-margin-top:150px;
}
.prose div:first-child{border-top:0;padding-top:0}
.prose small{
  display:block;
  font-family:var(--disp);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--cyan);
  margin-bottom:6px;
}
.prose h2,.prose h3{
  font-family:var(--disp);
  line-height:1.16;
  margin:.1em 0 .55em;
  color:var(--neon);
  text-shadow:0 0 18px rgba(135,255,113,.35);
  overflow-wrap:break-word;
}
.prose h2{font-size:clamp(23px,4.2vw,34px)}
.prose h3{font-size:clamp(19px,3.2vw,24px);color:#b6ffa9}
.prose p{margin:0 0 1.05em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.35em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--cyan)}
.prose a{color:var(--neon);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:#f0fff0}
.prose blockquote{
  margin:0 0 1.1em;
  padding:12px 18px;
  border-left:4px solid var(--cyan);
  background:rgba(1,205,254,.08);
  border-radius:0 10px 10px 0;
  color:#e6ffe2;
}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.1em;font-size:16px}
.prose th,.prose td{border:1px solid var(--line);padding:9px 11px;text-align:left}
.prose th{background:rgba(135,255,113,.1);color:var(--neon)}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  background:rgba(1,205,254,.12);
  padding:1px 5px;
  border-radius:6px;
}
.prose hr{border:0;border-top:2px dashed var(--line);margin:1.4em 0}

.side{
  position:sticky;
  top:150px;
  align-self:start;
  padding:18px;
  border:2px solid var(--line);
  border-radius:10px;
  background:rgba(135,255,113,.045);
}
.side small{
  display:block;
  font-family:var(--disp);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--cyan);
}
.side h2{
  margin:.35em 0 .8em;
  font-family:var(--disp);
  font-size:19px;
  line-height:1.25;
  color:var(--neon);
  overflow-wrap:break-word;
}
.side-list{display:grid;gap:6px}
.side-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  border:2px solid transparent;
  border-radius:8px;
  color:#cdf6c6;
  text-decoration:none;
  font-size:16px;
}
.side-list a:hover,.side-list a:focus-visible{
  border-color:var(--cyan);
  background:rgba(1,205,254,.12);
  color:#eafff8;
}
.side-top{margin:14px 0 0}
.side-top a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 12px;
  border:2px solid var(--neon);
  border-radius:8px;
  color:var(--neon);
  text-decoration:none;
  font-size:16px;
}

/* ---------- 页脚：三栏 + 大块 + 底栏 ---------- */
.foot{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:16px 22px;
  margin-top:clamp(48px,9vw,92px);
  padding:clamp(30px,6vw,60px) clamp(16px,4vw,40px) clamp(24px,4vw,38px);
  border-top:3px solid var(--neon);
  background:linear-gradient(180deg,#0b120c 0%,#0f2018 100%);
}
.foot-cta{
  grid-column:1/-1;
  margin:0;
  font-family:var(--disp);
  font-size:clamp(32px,8.4vw,74px);
  line-height:.94;
  letter-spacing:-.02em;
  color:transparent;
  -webkit-text-stroke:2px var(--neon);
  overflow-wrap:break-word;
}
.foot-links{
  grid-column:1/3;
  margin:0;
  display:flex;
  flex-wrap:wrap;
  gap:4px 6px;
}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 10px;
  border-radius:8px;
  color:#bfe9b8;
  text-decoration:none;
  font-size:16px;
}
.foot-links a:hover,.foot-links a:focus-visible{background:rgba(135,255,113,.16);color:#f2fff0}
.foot-to{margin:0}
.foot-to a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 12px;
  border:2px solid var(--cyan);
  border-radius:8px;
  color:var(--cyan);
  text-decoration:none;
  font-size:16px;
}
.foot-to a:hover,.foot-to a:focus-visible{background:var(--cyan);color:#08130a}
.foot-bar{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:10px 16px;
  margin:8px 0 0;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.foot-bar small{color:#8fb291;font-size:14px}
.foot-bar a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 10px;
  color:#8fb291;
  text-decoration:none;
  font-size:16px;
}
.foot-bar a:hover,.foot-bar a:focus-visible{color:var(--neon)}

/* ---------- 滚动显现（无 JS 时默认可见） ---------- */
.rv{opacity:0;transform:translate3d(0,16px,0);transition:opacity .55s ease,transform .55s ease}
.rv-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .ghost{will-change:auto}
}

@media (max-width:900px){
  .sheet{grid-template-columns:minmax(0,1fr)}
  .side{position:static;order:2}
  .prose div{scroll-margin-top:170px}
}

@media (max-width:700px){
  .foot{grid-template-columns:1fr}
  .foot-links,.foot-to,.foot-bar{grid-column:1/-1}
  .hero{min-height:auto;padding-bottom:clamp(52px,14vw,84px);clip-path:polygon(0 0,100% 0,100% 93%,0 100%)}
  .ghost{bottom:4%}
}

@media (max-width:420px){
  body{font-size:16px}
  .chips a{padding:0 12px}
  .foot-links a{padding:0 8px}
}

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