:root{
  --bg: #070a15;
  --bg2: #0b1020;
  --paper: rgba(255,255,255,.06);
  --border: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.70);
  --muted2: rgba(255,255,255,.56);
  --brand: #7c5cff;
  --brand2:#2dd4bf;
  --radius: 18px;
  --container: 980px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: "Noto Sans TC", system-ui, -apple-system, Segoe UI, Roboto, Arial, "PingFang TC", "Microsoft JhengHei", sans-serif;
  background:
    radial-gradient(900px 600px at 12% 0%, rgba(45,212,191,.16), transparent 60%),
    radial-gradient(900px 600px at 88% 8%, rgba(124,92,255,.22), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  color: var(--text);
  line-height: 1.65;
  letter-spacing: .2px;
}

a{color:inherit; text-decoration:none}
.container{width:min(var(--container), calc(100% - 40px)); margin:0 auto}

.skip-link{
  position:absolute;
  left:-999px;
  top:10px;
  padding:10px 12px;
  background:#111836;
  border:1px solid var(--border);
  border-radius: 12px;
  z-index:9999;
}
.skip-link:focus{left:20px}

.site-header{
  position: sticky;
  top:0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(7,10,21,.68);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.site-header[data-elevate="true"]{
  border-bottom-color: rgba(255,255,255,.10);
  background: rgba(7,10,21,.82);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  padding: 14px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap: 10px;
}
.brand-mark{
  width: 38px;
  height: 38px;
  display:grid;
  place-items:center;
  font-weight:800;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(124,92,255,.95), rgba(45,212,191,.85));
}
.brand-text{display:flex; flex-direction:column; line-height:1.1}
.brand-zh{font-weight:700; font-size:15px}
.brand-en{font-size:12px; color: var(--muted2)}

.nav{display:flex; gap: 10px; flex-wrap:wrap; justify-content:flex-end}
.nav-link{
  color: rgba(255,255,255,.76);
  font-weight: 800;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
}
.nav-link:hover{background: rgba(255,255,255,.08)}
.nav-link:focus-visible{outline: 3px solid rgba(124,92,255,.45); outline-offset: 2px}

.main{padding: 30px 0 44px}
.page-head{padding: 18px 0 18px}
.title{margin: 0 0 10px; font-size: clamp(28px, 3.5vw, 38px); line-height: 1.15}
.subtitle{margin: 0 0 12px; color: var(--muted); max-width: 85ch}
.meta{
  display:flex;
  align-items:center;
  gap: 10px;
  color: rgba(255,255,255,.62);
  font-weight: 700;
  flex-wrap:wrap;
}
.meta .dot{opacity:.7}

.paper{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius);
  padding: 18px 18px;
  box-shadow: 0 16px 50px rgba(0,0,0,.32);
}
.section{padding: 10px 0}
.h2{
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: .2px;
}
.p{margin: 0 0 10px; color: rgba(255,255,255,.82)}
.list{
  margin: 0 0 10px;
  padding-left: 18px;
  color: rgba(255,255,255,.80);
}
.list li{margin: 8px 0}

.link{
  color: rgba(255,255,255,.88);
  font-weight: 900;
  border-bottom: 1px solid rgba(255,255,255,.26);
  padding-bottom: 2px;
}
.link:hover{border-bottom-color: rgba(45,212,191,.75)}
.link:focus-visible{outline: 3px solid rgba(124,92,255,.45); outline-offset: 2px}

.back-row{
  display:flex;
  gap: 10px;
  flex-wrap:wrap;
  margin-top: 14px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  font-weight: 900;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  padding: 12px 14px;
  background: rgba(255,255,255,.04);
  cursor: pointer;
}
.btn:hover{background: rgba(255,255,255,.08)}
.btn:focus-visible{outline: 3px solid rgba(124,92,255,.45); outline-offset: 2px}
.btn-secondary{
  background: linear-gradient(135deg, rgba(45,212,191,.85), rgba(124,92,255,.90));
  border-color: transparent;
  color: #071015;
}
.btn-secondary:hover{filter: brightness(1.03)}

.site-footer{
  padding: 26px 0 36px;
  border-top: 1px solid rgba(255,255,255,.08);
  background: rgba(0,0,0,.10);
}
.footer-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}
.footer-note{margin: 0; color: rgba(255,255,255,.58)}
.footer-links{display:flex; gap: 12px; flex-wrap:wrap}
.footer-link{
  color: rgba(255,255,255,.70);
  font-weight: 900;
  padding: 10px 0;
  border-bottom: 1px solid transparent;
}
.footer-link:hover{color: rgba(255,255,255,.90); border-bottom-color: rgba(124,92,255,.5)}

@media (max-width: 720px){
  .paper{padding: 16px 14px}
}

@media (prefers-reduced-motion: reduce){
  *{scroll-behavior:auto !important; transition: none !important; animation: none !important}
}