:root{
  --bg:#000000;
  --panel:#121212;
  --ink:#e9edf5;
  --dim:#8e98ab;
  --line:rgba(255,255,255,.09);
  --neon:#3d6bff;
  --cyan:#39e6ff;
  --r:4px;
  --sans:"Barlow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --cond:"Barlow Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{color-scheme:dark;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding-bottom:96px;background:var(--bg);color:var(--ink);
  font:400 17px/1.68 var(--sans);overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block;border-radius:var(--r)}
h1,h2,h3{font-family:var(--cond);font-weight:700;margin:0}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(8,9,13,.82);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
}
.burger,.cta,.veil-close{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 16px;border-radius:var(--r);
  border:1px solid var(--line);background:rgba(255,255,255,.05);
  color:var(--ink);font:inherit;font-size:.95rem;letter-spacing:.08em;
  cursor:pointer;transition:background .2s,border-color .2s,box-shadow .2s;
}
.burger:active,.cta:active,.veil-close:active{background:rgba(61,107,255,.2)}
.cta{
  border-color:rgba(61,107,255,.55);color:#cfdcff;
  box-shadow:0 0 14px rgba(61,107,255,.24);
}
.dock-brand{
  justify-self:center;display:inline-flex;align-items:center;min-height:44px;
  font-family:var(--cond);font-size:1.12rem;letter-spacing:.14em;color:#fff;
  text-shadow:0 0 14px rgba(61,107,255,.55);
}
.dock-links{display:none}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;min-height:100svh;display:flex;flex-direction:column;
  justify-content:flex-end;align-items:flex-end;text-align:right;
  padding:76px 20px 100px;gap:16px;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:62%;pointer-events:none;
  background:radial-gradient(62% 84% at 102% 100%,rgba(61,107,255,.18),transparent 70%);
}
.hero h1{
  position:relative;z-index:1;max-width:100%;word-break:break-word;
  font-size:clamp(2.5rem,11vw,6.6rem);line-height:.98;letter-spacing:-.01em;
  text-shadow:0 0 30px rgba(57,230,255,.22);
}
.badge{
  position:absolute;top:64px;left:20px;z-index:2;margin:0;
  padding:6px 12px;border:1px solid rgba(57,230,255,.4);border-radius:var(--r);
  background:rgba(57,230,255,.08);color:var(--cyan);
  font-size:.9rem;letter-spacing:.2em;
  text-shadow:0 0 10px rgba(57,230,255,.6);
  animation:float 5.5s ease-in-out infinite;
}
@keyframes float{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-7px)}
}
.lead{
  position:relative;z-index:1;max-width:31ch;margin:0;
  color:var(--dim);font-size:1rem;
}

/* ---------- 正文 ---------- */
.wrap{
  display:grid;grid-template-columns:minmax(0,1fr);gap:18px;
  max-width:1200px;margin:0 auto;padding:0 20px 56px;
}
.prose{min-width:0}
.prose > div{
  position:relative;margin:0 0 18px;padding:24px 20px;scroll-margin-top:22px;
  border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(160deg,rgba(26,29,38,.86),rgba(11,12,17,.94));
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  box-shadow:inset 2px 0 0 rgba(61,107,255,.45);
}
.prose h2{
  font-size:clamp(1.5rem,4.4vw,2.05rem);line-height:1.16;
  margin:0 0 .55em;color:#fff;
}
.prose h3{font-size:1.2rem;margin:1.3em 0 .5em;color:#dbe4f6}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.3em}
.prose li{margin:.35em 0}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:#fff}
.prose blockquote{
  margin:1em 0;padding:.5em 0 .5em 14px;
  border-left:2px solid var(--neon);color:var(--dim);
}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1em;font-size:.98rem}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left}

/* ---------- 侧栏 ---------- */
.side{
  padding:20px;border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(160deg,rgba(22,25,33,.9),rgba(10,11,15,.94));
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.side h2{font-size:1.35rem;margin:0 0 .2em}
.subtitle{margin:0 0 14px;color:var(--dim);font-size:.95rem;letter-spacing:.14em}
.side-list{list-style:none;margin:0;padding:0;counter-reset:s}
.side-list li{counter-increment:s}
.side-list a{
  display:flex;align-items:center;gap:10px;min-height:40px;padding:4px 0;
  border-bottom:1px solid rgba(255,255,255,.05);
  color:var(--dim);font-size:.98rem;
}
.side-list a::before{
  content:counter(s,decimal-leading-zero);
  font-family:var(--cond);font-size:.9rem;letter-spacing:.1em;color:var(--neon);
}
.side-list a:hover{color:#fff}

/* ---------- 页脚 ---------- */
.foot{
  padding:46px 20px 18px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(18,18,18,.9),#000);
}
.foot-top{margin-bottom:26px}
.foot-big{
  margin:0;overflow-wrap:anywhere;
  font-family:var(--cond);font-weight:700;line-height:.86;letter-spacing:.01em;
  font-size:clamp(2.5rem,13vw,7rem);
  color:rgba(255,255,255,.14);-webkit-text-stroke:1px rgba(255,255,255,.34);
}
.foot-nav{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;
  max-width:1200px;margin:0 auto 24px;
}
.foot-nav dl{margin:0}
.foot-nav dt{
  font-size:.9rem;letter-spacing:.2em;color:var(--neon);margin-bottom:6px;
}
.foot-nav dd{margin:0}
.foot-nav a{
  display:inline-flex;align-items:center;min-height:40px;padding:2px 0;
  color:var(--dim);font-size:.98rem;
}
.foot-nav a:hover{color:#fff}
.foot-legal{
  max-width:1200px;margin:0 auto;padding-top:16px;
  border-top:1px solid var(--line);text-align:center;
  color:#6c768c;font-size:.95rem;
}
.foot-legal p{margin:0}

/* ---------- 全屏遮罩菜单 ---------- */
.veil{
  position:fixed;inset:0;z-index:60;display:grid;
  grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
  padding:76px 20px 124px;
  background:rgba(0,0,0,.95);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;pointer-events:none;transition:opacity .26s ease;
}
body.menu-open{overflow:hidden}
body.menu-open .veil{opacity:1;pointer-events:auto}
.veil-close{position:absolute;top:14px;right:14px}
.veil-col{display:flex;flex-direction:column;gap:4px;min-width:0}
.veil-col.r{align-items:flex-end;text-align:right}
.veil-col a{
  display:inline-flex;align-items:center;min-height:46px;padding:4px 2px;
  border-bottom:1px solid rgba(255,255,255,.07);color:var(--ink);
  font-family:var(--cond);font-size:clamp(1.05rem,4.6vw,1.7rem);letter-spacing:.04em;
}
.veil-col a:hover{color:var(--cyan)}
.veil-brand{
  margin:0;writing-mode:vertical-rl;
  font-family:var(--cond);font-size:.9rem;letter-spacing:.3em;color:var(--cyan);
  text-shadow:0 0 12px rgba(57,230,255,.6);
}

/* ---------- 滚动显现 ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.in{opacity:1;transform:none;transition:opacity .5s ease,transform .5s ease}

/* ---------- 断点 ---------- */
@media (min-width:980px){
  .wrap{grid-template-columns:minmax(0,1fr) 296px;gap:26px;align-items:start}
  .side{position:sticky;top:22px}
  .hero{padding:96px 46px 116px}
  .badge{left:46px;top:84px}
}
@media (min-width:900px){
  .dock{display:flex;align-items:center;justify-content:center;gap:18px}
  .dock-links{display:flex;align-items:center;gap:4px}
  .dock-links a{
    display:inline-flex;align-items:center;min-height:44px;padding:0 9px;
    color:var(--dim);font-size:.95rem;
  }
  .dock-links a:hover{color:#fff}
  .burger{display:none}
  .cta{margin-left:14px}
  .veil{padding:80px 60px 120px}
  .veil-close{top:22px;right:22px}
}
@media (max-width:480px){
  body{font-size:16px}
  .hero{padding:78px 18px 96px}
  .badge{left:18px;top:66px}
  .prose > div{padding:20px 15px}
  .foot{padding:38px 16px 16px}
  .foot-nav{gap:10px}
  .foot-nav a,.foot-nav dt{font-size:.88rem}
  .veil{padding:72px 14px 128px;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

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