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

:root{
  --g:#69ff69;
  --c:#00ffff;
  --ink:#172617;
  --deep:#0a130c;
  --line:rgba(105,255,105,.28);
  --txt:#dff8e4;
  --dim:#a9cfb5;
  --r:18px;
  --chrome:linear-gradient(158deg,#f4fff7 0%,#cdf8da 16%,#69ff69 40%,#00ffff 64%,#10231a 100%);
  --serif:"Newsreader",Georgia,"Songti SC",serif;
  --sans:"Roboto",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}

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

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

body{
  margin:0;
  min-height:100vh;
  overflow-x:hidden;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  color:var(--txt);
  background:
    radial-gradient(1100px 620px at 88% -8%, rgba(0,255,255,.20), transparent 62%),
    radial-gradient(880px 520px at 6% 14%, rgba(105,255,105,.15), transparent 66%),
    linear-gradient(180deg,#0b140d 0%,#172617 46%,#0a130c 100%);
  background-attachment:fixed;
}

a{color:var(--g)}
img{max-width:100%;height:auto;display:block}

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky;
  top:0;
  z-index:60;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:8px 16px;
  background:linear-gradient(180deg,rgba(15,28,18,.96),rgba(15,28,18,.72));
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 26px -18px rgba(0,255,255,.9);
}

.mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:44px;
  min-height:44px;
  text-decoration:none;
  border-radius:50%;
}

.mark-glyph{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:50%;
  font-family:var(--serif);
  font-weight:700;
  font-size:20px;
  color:#07160b;
  background:var(--chrome);
  box-shadow:0 0 20px rgba(105,255,105,.6),inset 0 1px 0 rgba(255,255,255,.9);
}

.top-acts{display:flex;align-items:center;gap:10px}

.contact,
.burger{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:42px;
  padding:0 16px;
  font-size:16px;
  font-family:var(--sans);
  font-weight:500;
  color:#06200e;
  text-decoration:none;
  border:1px solid rgba(255,255,255,.7);
  border-radius:999px;
  background:linear-gradient(160deg,#f0fff5,#69ff69 55%,#00ffff);
  box-shadow:0 0 16px rgba(0,255,255,.35),inset 0 1px 0 #fff;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease;
}
.contact:hover,.burger:hover{transform:translateY(-2px);box-shadow:0 0 24px rgba(105,255,105,.75),inset 0 1px 0 #fff}
.contact:active,.burger:active{transform:translateY(0) scale(.98)}

.burger-bars{display:inline-flex;flex-direction:column;gap:3px}
.burger-bars i{display:block;width:16px;height:2px;border-radius:2px;background:#06200e}

/* ---------- 全屏遮罩菜单 ---------- */
.veil{
  position:fixed;
  inset:0;
  z-index:80;
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:20px 22px 32px;
  overflow-y:auto;
  background:
    radial-gradient(700px 420px at 82% 0%, rgba(0,255,255,.28), transparent 68%),
    linear-gradient(180deg,#0d1a12 0%,#172617 60%,#0b140e 100%);
  visibility:hidden;
  transform:translateY(-102%);
  transition:transform .48s cubic-bezier(.2,.85,.25,1),visibility .48s;
}
.menu-open .veil{transform:translateY(0);visibility:visible}

.veil-head{display:flex;align-items:center;justify-content:space-between;gap:16px}
.veil-title{margin:0;font-family:var(--serif);font-size:15px;letter-spacing:.24em;color:var(--c)}
.veil-title span{border-bottom:1px solid rgba(0,255,255,.5);padding-bottom:4px}

.veil-x{
  width:44px;
  height:44px;
  font-size:24px;
  line-height:1;
  color:#06200e;
  border:1px solid #fff;
  border-radius:50%;
  background:var(--chrome);
  cursor:pointer;
}

.veil-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.veil-link{
  display:block;
  padding:12px 4px;
  font-family:var(--serif);
  font-size:clamp(22px,4.4vw,34px);
  line-height:1.3;
  color:#effff4;
  text-decoration:none;
  border-bottom:1px dashed rgba(105,255,105,.22);
  transition:color .2s ease,padding-left .2s ease,text-shadow .2s ease;
}
.veil-link:hover{color:var(--c);padding-left:12px;text-shadow:0 0 18px rgba(0,255,255,.7)}

.veil-foot{
  margin:auto 0 0;
  font-family:var(--serif);
  font-size:14px;
  letter-spacing:.18em;
  color:var(--dim);
}

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

.wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 248px;
  gap:44px;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px 64px;
}

.doc{min-width:0}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  justify-content:center;
  gap:18px;
  min-height:70vh;
  padding:64px 0 48px;
  text-align:right;
  overflow:hidden;
  isolation:isolate;
}
.hero::before{
  content:"";
  position:absolute;
  z-index:-1;
  top:10%;
  right:-6%;
  width:min(46vw,340px);
  aspect-ratio:1;
  border-radius:50%;
  background:radial-gradient(circle at 32% 28%,#f6fff9 0%,#69ff69 30%,#00ffff 60%,rgba(0,255,255,0) 72%);
  opacity:.5;
  filter:blur(2px);
}
.hero::after{
  content:"✦";
  position:absolute;
  top:16%;
  left:4%;
  font-size:28px;
  color:var(--c);
  text-shadow:0 0 16px var(--c);
  animation:twinkle 3.4s ease-in-out infinite;
}
@keyframes twinkle{0%,100%{opacity:.35;transform:scale(.85)}50%{opacity:1;transform:scale(1.1)}}

.hero-ghost{
  position:absolute;
  z-index:-1;
  top:26%;
  right:0;
  margin:0;
  font-family:var(--serif);
  font-size:clamp(58px,15vw,170px);
  line-height:.9;
  letter-spacing:-.02em;
  white-space:nowrap;
  color:transparent;
  -webkit-text-stroke:1px rgba(105,255,105,.32);
  pointer-events:none;
}

.hero-title{
  margin:0;
  max-width:16ch;
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(34px,7.2vw,74px);
  line-height:1.04;
  letter-spacing:-.01em;
  background:linear-gradient(178deg,#ffffff 8%,#c9ffd8 46%,#69ff69 78%,#00ffff 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 22px rgba(105,255,105,.42));
}

.hero-lede{
  margin:0;
  max-width:44ch;
  font-size:17px;
  color:var(--dim);
  border-right:3px solid var(--c);
  padding-right:16px;
}

/* ---------- 正文 ---------- */
.paper{display:block}

.paper div{
  position:relative;
  padding:clamp(32px,5vw,58px) 0;
  border-top:1px solid rgba(105,255,105,.18);
  scroll-margin-top:92px;
}

.paper div:first-of-type{border-top:0}

.paper h2{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(24px,4vw,38px);
  line-height:1.2;
  margin:0 0 18px;
  color:#f3fff7;
  text-shadow:0 0 24px rgba(0,255,255,.3);
}
.paper h2::before{
  content:"✦";
  display:inline-block;
  margin-right:.4em;
  font-size:.62em;
  color:var(--g);
  vertical-align:.28em;
  text-shadow:0 0 14px var(--g);
}
.paper h3{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(20px,3vw,26px);
  margin:26px 0 12px;
  color:#e9fff0;
}
.paper p{margin:0 0 18px;max-width:72ch}
.paper ul,.paper ol{margin:0 0 18px;padding-left:22px;max-width:72ch}
.paper li{margin:0 0 8px}
.paper li::marker{color:var(--c)}
.paper a{color:var(--c);text-underline-offset:4px}
.paper strong{color:#fff}
.paper blockquote{
  margin:0 0 20px;
  padding:16px 20px;
  border-radius:var(--r);
  border:1px solid rgba(0,255,255,.32);
  background:linear-gradient(150deg,rgba(0,255,255,.10),rgba(105,255,105,.05));
  box-shadow:0 14px 36px -22px #000;
}
.paper blockquote p:last-child{margin-bottom:0}
.paper div > *{min-width:0}

/* ---------- 侧栏 ---------- */
.dock{
  position:sticky;
  top:80px;
  align-self:start;
  margin-top:34px;
  padding:18px 16px;
  border-radius:var(--r);
  border:1px solid rgba(0,255,255,.24);
  background:linear-gradient(168deg,rgba(255,255,255,.08),rgba(0,255,255,.05) 45%,rgba(23,38,23,.7));
  box-shadow:0 22px 48px -30px #000,inset 0 1px 0 rgba(255,255,255,.18);
}
.dock-title{
  margin:0 0 12px;
  font-family:var(--sans);
  font-size:13px;
  font-weight:500;
  letter-spacing:.26em;
  color:var(--c);
}
.dock-title span{border-bottom:1px solid rgba(0,255,255,.45);padding-bottom:3px}

.dock-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.dock-link{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:4px 8px;
  border-radius:12px;
  font-size:16px;
  line-height:1.4;
  color:var(--txt);
  text-decoration:none;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.dock-link:hover{background:rgba(105,255,105,.14);color:var(--g);transform:translateX(3px)}

.totop{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  margin-top:12px;
  padding:0 12px;
  font-size:15px;
  color:var(--c);
  text-decoration:none;
  border:1px solid rgba(0,255,255,.4);
  border-radius:999px;
  transition:background .2s ease,color .2s ease;
}
.totop:hover{background:rgba(0,255,255,.16);color:#fff}

/* ---------- 页脚 ---------- */
.foot{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,19,12,.4),rgba(10,19,12,.9));
  padding:36px 20px 24px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr;
  gap:24px;
  max-width:1180px;
  margin:0 auto 24px;
}
.fcol{margin:0}
.fcol dt{
  font-size:13px;
  letter-spacing:.24em;
  color:var(--g);
  margin-bottom:10px;
}
.fcol dd{margin:0 0 6px;color:var(--dim);font-size:16px}
.fbrand{
  font-family:var(--serif);
  font-size:22px;
  color:#effff4;
  text-shadow:0 0 18px rgba(105,255,105,.4);
}
.foot-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.foot-link{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 2px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  transition:color .2s ease;
}
.foot-link:hover{color:var(--c)}
.foot-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  max-width:1180px;
  margin:0 auto;
  padding-top:16px;
  border-top:1px dashed rgba(105,255,105,.2);
}
.copy{margin:0;font-size:15px;color:var(--dim);font-family:var(--serif)}

/* ---------- 滚动显现 ---------- */
.js .paper div,
.js .dock,
.js .foot-grid > dl{opacity:0;transform:translateY(20px)}
.js .revealed{opacity:1;transform:none;transition:opacity .6s ease,transform .6s cubic-bezier(.2,.85,.25,1)}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr);gap:24px;padding:0 16px 48px}
  .doc{order:2}
  .dock{order:1;position:static;margin-top:20px}
  .dock-nav ul{flex-direction:row;flex-wrap:wrap;gap:6px}
  .dock-link{min-height:40px;padding:4px 12px;border:1px solid rgba(105,255,105,.28);font-size:15px}
  .dock .totop{margin-top:10px}
  .hero{min-height:62vh;padding:44px 0 32px}
  .hero-ghost{top:34%;font-size:clamp(44px,13vw,110px)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .fcol-brand{grid-column:1 / -1}
}

@media (max-width:560px){
  body{font-size:16px}
  .topbar{padding:6px 12px}
  .contact,.burger{padding:0 12px;font-size:15px}
  .hero{min-height:58vh}
  .hero-lede{border-right-width:2px;padding-right:12px;font-size:16px}
  .foot-grid{grid-template-columns:1fr;gap:16px}
  .foot-bar{justify-content:flex-start}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .paper div,
  .js .dock,
  .js .foot-grid > dl{opacity:1;transform:none}
  .hero::after{animation:none}
  *{transition-duration:.01ms !important}
}

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