:root{
  --ink:#1c1726;
  --ink-2:#241d33;
  --ink-3:#2c1b46;
  --violet:#6514ff;
  --neon:#bf00ff;
  --mist:#f1ecfa;
  --muted:#b9aecf;
  --radius:18px;
  --rail:248px;
}

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

html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--ink);
  color:var(--mist);
  font-family:"Noto Sans TC",-apple-system,"PingFang TC","Microsoft JhengHei",sans-serif;
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}

body::before{
  content:"";
  position:fixed;
  inset:-22%;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 80% 10%,rgba(191,0,255,.30),transparent 44%),
    radial-gradient(circle at 10% 82%,rgba(101,20,255,.32),transparent 48%),
    repeating-linear-gradient(135deg,rgba(255,255,255,.022) 0 14px,transparent 14px 30px);
  animation:drift 24s ease-in-out infinite alternate;
}

@keyframes drift{
  from{transform:translate3d(0,0,0) scale(1)}
  to{transform:translate3d(-3%,2%,0) scale(1.08)}
}

a{color:inherit}
a:focus-visible,button:focus-visible{outline:3px solid var(--neon);outline-offset:3px}

/* 左侧竖排固定导航 */
.siderail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail);
  z-index:40;
  display:flex;
  flex-direction:column;
  gap:26px;
  padding:26px 16px 22px;
  background:linear-gradient(180deg,rgba(20,15,29,.98),rgba(28,23,38,.86));
  border-right:1px solid rgba(191,0,255,.30);
  backdrop-filter:blur(8px);
}

.brand{
  display:block;
  padding:14px 14px 20px;
  border-radius:14px;
  font-family:"Noto Serif TC","Songti SC",serif;
  font-size:21px;
  font-weight:700;
  line-height:1.35;
  letter-spacing:.02em;
  color:#fff;
  text-decoration:none;
  background:linear-gradient(125deg,var(--violet),var(--neon));
  clip-path:polygon(0 0,100% 0,100% 74%,0 100%);
  transition:transform .24s ease;
}
.brand:hover{transform:translateY(-2px)}

.dock ol{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:6px;
}

.dock a{
  display:flex;
  align-items:center;
  gap:11px;
  min-height:44px;
  padding:10px 12px;
  border-radius:12px;
  color:var(--muted);
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
  transition:background .24s ease,color .24s ease,transform .24s ease;
}

.pip{
  flex:none;
  width:9px;height:9px;
  background:var(--violet);
  transform:rotate(45deg);
  transition:background .24s ease;
}

.dock a:hover,.dock a:focus-visible{
  background:var(--violet);
  color:#fff;
  transform:translateX(5px);
}
.dock a:hover .pip,.dock a:focus-visible .pip{background:#fff}

/* 主区 */
main{
  position:relative;
  z-index:1;
  margin-left:var(--rail);
}

.wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 286px;
  gap:52px;
  align-items:start;
  max-width:1240px;
  margin:0 auto;
  padding:34px 44px 72px;
}

.stream{min-width:0}
.doc{min-width:0}

/* 首屏 */
.hero{
  position:relative;
  display:flex;
  align-items:flex-end;
  justify-content:flex-end;
  min-height:45vh;
  padding:30px 28px 46px;
  border-radius:var(--radius);
  overflow:hidden;
  isolation:isolate;
  clip-path:polygon(0 0,100% 0,100% 100%,0 83%);
  background:linear-gradient(118deg,#32096e,var(--violet) 56%,var(--neon));
}

.hero-art{position:absolute;inset:0;z-index:-1}

.hero-art img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.46;
  filter:grayscale(1) contrast(1.12);
  mix-blend-mode:luminosity;
  will-change:transform;
}

.hero-txt{
  max-width:26ch;
  text-align:right;
}

h1{
  margin:0;
  font-family:"Noto Serif TC","Songti SC",serif;
  font-size:clamp(34px,4.5vw,64px);
  font-weight:700;
  line-height:1.12;
  color:#fff;
  text-shadow:0 6px 28px rgba(20,15,29,.55);
}

/* 正文 */
.prose{margin-top:46px}

.prose>div{
  position:relative;
  overflow:hidden;
  margin-bottom:32px;
  padding:34px 30px;
  border-radius:var(--radius);
  background:var(--ink-2);
  scroll-margin-top:26px;
}

.prose>div:nth-child(even){background:var(--ink-3)}

.prose>div::before{
  content:"";
  position:absolute;
  top:0;bottom:0;left:0;
  width:6px;
  background:linear-gradient(180deg,var(--violet),var(--neon));
}

.prose h2{
  margin:0 0 14px;
  font-family:"Noto Serif TC","Songti SC",serif;
  font-size:clamp(24px,2.6vw,36px);
  font-weight:700;
  line-height:1.26;
  color:#fff;
}

.prose h2+p{margin-top:0}

.prose h3{
  margin:26px 0 10px;
  font-size:20px;
  line-height:1.4;
  color:#e7d9ff;
}

.prose p{margin:0 0 18px}

.prose ul,.prose ol{margin:0 0 18px;padding-left:1.3em}
.prose li{margin:0 0 8px}
.prose li::marker{color:var(--neon)}
.prose strong{color:#e9d3ff}
.prose a{color:#d3b1ff;text-underline-offset:3px}

.prose blockquote{
  margin:22px 0;
  padding:16px 20px;
  border-left:5px solid var(--neon);
  border-radius:0 14px 14px 0;
  background:rgba(191,0,255,.13);
}
.prose blockquote p:last-child{margin:0}

.prose img{display:block;max-width:100%;height:auto;margin:20px 0;border-radius:14px}

.prose table{width:100%;margin:20px 0;border-collapse:collapse;font-size:16px}
.prose th,.prose td{padding:10px;text-align:left;border-bottom:1px solid rgba(191,0,255,.28)}
.prose th{color:#fff}

/* 侧栏 */
.side{
  position:sticky;
  top:26px;
  display:flex;
  flex-direction:column;
  gap:18px;
}

.sidebox{
  padding:24px 20px;
  border-radius:var(--radius);
  background:var(--ink-3);
}

.sidebox h2{
  margin:0 0 6px;
  font-family:"Noto Serif TC","Songti SC",serif;
  font-size:22px;
  line-height:1.3;
  color:#fff;
}

.subtitle{
  margin:0 0 16px;
  color:var(--muted);
  font-size:16px;
  line-height:1.5;
}

.anchors{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
}

.anchors a{
  display:block;
  min-height:44px;
  padding:11px 2px;
  border-bottom:1px dashed rgba(191,0,255,.32);
  color:var(--muted);
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}

.anchors a:hover,.anchors a:focus-visible{color:#fff;padding-left:10px}

.totop{
  width:100%;
  min-height:48px;
  margin-top:18px;
  padding:12px;
  border:0;
  border-radius:14px;
  background:var(--neon);
  color:#fff;
  font:inherit;
  font-size:16px;
  cursor:pointer;
  transition:background .24s ease,transform .24s ease;
}
.totop:hover{background:var(--violet);transform:translateY(-2px)}

/* 页脚 */
.foot{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px 28px;
  padding:38px 44px 38px calc(var(--rail) + 44px);
  background:#140f1d;
  border-top:3px solid var(--violet);
}

.foot-brand a{
  font-family:"Noto Serif TC","Songti SC",serif;
  font-size:clamp(22px,2.4vw,34px);
  font-weight:700;
  line-height:1.2;
  color:#fff;
  text-decoration:none;
}
.foot-brand a:hover{color:var(--neon)}

.foot-nav ol{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:4px 18px;
  margin:0;
  padding:0;
}

.foot-nav a{
  display:inline-block;
  min-height:44px;
  padding:10px 2px;
  color:var(--muted);
  font-size:16px;
  text-decoration:none;
  transition:color .2s ease;
}
.foot-nav a:hover,.foot-nav a:focus-visible{color:var(--neon)}

.copy{margin:0;color:var(--muted);font-size:16px;text-align:center}

@media (max-width:1160px){
  .wrap{grid-template-columns:minmax(0,1fr) 250px;gap:32px;padding-right:28px;padding-left:28px}
  .foot{padding-right:28px;padding-left:calc(var(--rail) + 28px)}
}

@media (max-width:900px){
  .siderail{
    right:0;
    bottom:auto;
    width:auto;
    height:auto;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:8px 12px;
    border-right:0;
    border-bottom:1px solid rgba(191,0,255,.32);
    background:rgba(20,15,29,.95);
  }

  .brand{
    flex:none;
    padding:11px 12px 15px;
    font-size:17px;
    white-space:nowrap;
  }

  .dock{flex:1;min-width:0}
  .dock ol{
    flex-direction:row;
    gap:4px;
    overflow-x:auto;
    scrollbar-width:none;
  }
  .dock ol::-webkit-scrollbar{display:none}
  .dock a{
    white-space:nowrap;
    padding:8px 10px;
    font-size:16px;
    min-height:44px;
  }
  .pip{display:none}

  main{margin-left:0;padding-top:80px}

  .wrap{
    grid-template-columns:1fr;
    gap:34px;
    padding:18px 16px 48px;
  }

  .hero{
    min-height:42vh;
    padding:26px 18px 42px;
    clip-path:polygon(0 0,100% 0,100% 100%,0 88%);
  }

  .hero-txt{max-width:100%}

  .prose{margin-top:32px}
  .prose>div{padding:26px 20px;scroll-margin-top:94px}

  .side{position:static}

  .foot{
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
    padding:26px 16px 34px;
  }
  .copy{text-align:left}
}

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

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