:root{
  color-scheme:dark;
  --bg:#000;
  --layer:#121212;
  --layer-2:#181818;
  --line:#232323;
  --line-2:#2e2e2e;
  --fg:#ededf0;
  --dim:#9b9ba4;
  --blue:#4d7fd6;
  --blue-lt:#8fb4ef;
  --deep:#0d1728;
  --gold:#c8a659;
  --serif:"Playfair Display",Georgia,"Songti SC","Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{background:#000;scroll-behavior:smooth}
body{
  margin:0;padding:0 0 180px;background:var(--bg);color:var(--fg);
  font-family:var(--sans);font-size:16px;line-height:1.72;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:radial-gradient(rgba(120,155,220,.10) 1px,transparent 1px);
  background-size:20px 20px;
}
main,.dock,.foot{position:relative;z-index:1}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
p{margin:0 0 1em}
h1,h2,h3{margin:0;font-weight:600}
:focus-visible{outline:2px solid var(--blue-lt);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:0;z-index:40;padding:12px 18px;background:var(--layer);border:1px solid var(--blue)}
.skip:focus{left:12px;top:12px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- 底部固定导航条 ---------- */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  background:rgba(6,6,8,.95);border-top:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  box-shadow:0 -18px 44px rgba(0,0,0,.8);
}
.dock__in{
  display:grid;grid-template-columns:1fr auto 1fr auto;
  grid-template-areas:"l brand r s";align-items:center;gap:8px;
  max-width:1180px;margin:0 auto;padding:8px 16px;
}
.dock__navs{display:contents}
.dock__nav p{display:flex;gap:0;margin:0}
.dock__nav--l{grid-area:l;justify-self:end}
.dock__nav--r{grid-area:r;justify-self:start}
.dock__link{
  display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:10px 8px;
  font-size:16px;color:var(--dim);text-decoration:none;white-space:nowrap;
  border-bottom:1px solid transparent;transition:color .25s,border-color .25s;
}
.dock__link .ico{color:#2f4468;flex:0 0 auto;transition:color .25s,transform .3s}
.dock__link:hover,.dock__link:focus-visible{color:#fff;border-bottom-color:var(--blue)}
.dock__link:hover .ico{color:var(--blue-lt);transform:rotate(45deg)}
.dock__link.is-active{color:#fff}
.dock__link.is-active .ico{color:var(--gold)}
.dock__brand{
  grid-area:brand;justify-self:center;display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:6px 14px;font-family:var(--serif);font-size:17px;font-weight:600;
  letter-spacing:.06em;color:#fff;text-decoration:none;white-space:nowrap;
  text-shadow:0 0 14px rgba(77,127,214,.55);
}
.dock__mark{width:8px;height:8px;flex:0 0 auto;background:var(--blue);box-shadow:0 0 12px var(--blue);transform:rotate(45deg)}
.dock__logo{width:22px;height:22px;object-fit:contain}
.dock__search{grid-area:s;justify-self:end;display:flex;border:1px solid var(--line-2);background:#0a0a0c}
.dock__search input{
  width:100px;min-height:40px;padding:0 10px;border:0;background:transparent;
  color:var(--fg);font:inherit;font-size:16px;outline:none;
}
.dock__search input::placeholder{color:#5e5e68}
.dock__search input.is-miss{color:var(--gold)}
.dock__search button{
  min-height:40px;padding:0 13px;border:0;border-left:1px solid var(--line-2);
  background:#101014;color:var(--dim);font:inherit;font-size:16px;cursor:pointer;
}
.dock__search button:hover{color:#fff;background:#171a22}

/* ---------- 首屏 ---------- */
.hero{
  display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  align-items:center;gap:36px;max-width:1180px;min-height:70vh;
  margin:0 auto;padding:52px 18px 44px;text-align:right;
}
.hero__art{margin:0;order:1;justify-self:center;width:100%;max-width:340px}
.art{width:100%;height:auto;filter:drop-shadow(0 0 22px rgba(48,90,160,.32));will-change:transform}
.hero__copy{order:2}
.kicker{
  display:inline-flex;align-items:center;gap:9px;margin:0;
  font-size:16px;letter-spacing:.2em;color:var(--gold);
}
.kicker::before{content:"";width:26px;height:1px;background:var(--gold)}
.hero h1{
  margin:.34em 0 0;font-family:var(--serif);font-size:clamp(2rem,5.2vw,3.5rem);
  line-height:1.14;letter-spacing:.01em;color:#fff;
  text-shadow:0 0 26px rgba(77,127,214,.3);
}
.hero__lead{margin:1em 0 0 auto;max-width:44ch;color:var(--dim)}
.hero__hint{margin:1.1em 0 0;color:#7d7e88;font-size:16px}
.hero__hint::before{content:"";display:inline-block;width:6px;height:6px;margin-right:8px;background:var(--blue);transform:rotate(45deg) translateY(-1px)}

/* ---------- 正文 + 右栏 ---------- */
.cols{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:52px;
  max-width:1180px;margin:0 auto;padding:0 18px 40px;align-items:start;
}
.stream{min-width:0}
.stream section{position:relative;padding:40px 0 8px;border-top:1px dashed var(--line-2);scroll-margin-top:28px}
.stream section:first-child{border-top:0;padding-top:4px}
.stream h2{
  position:relative;font-family:var(--serif);font-size:clamp(1.4rem,2.6vw,1.9rem);
  line-height:1.28;color:#fff;margin:0 0 .5em;
}
.stream h2::before{
  content:"";display:inline-block;width:8px;height:8px;margin-right:11px;
  background:var(--blue);box-shadow:0 0 10px var(--blue);
  transform:rotate(45deg) translateY(-2px);
}
.stream h3{font-size:1.06rem;letter-spacing:.04em;color:#e8eaf1;margin:1.7em 0 .5em}
.stream p{color:#cdcdd4}
.stream p:last-child{margin-bottom:0}
.stream ul,.stream ol{padding-left:1.3em;color:#cdcdd4}
.stream li{margin:.36em 0}
.stream strong{color:#fff}
.stream em{color:#dfe3ee}
.stream a{color:var(--blue-lt);text-decoration:underline;text-underline-offset:3px}
.stream a:hover{color:#fff}
.stream blockquote{margin:1.4em 0;padding:4px 0 4px 16px;border-left:2px solid var(--blue);color:#b9bcc6}
.stream figure{margin:1.5em 0}
.stream figure img{border:1px solid var(--line)}
.stream img{margin:1.2em 0}
.stream hr{border:0;border-top:1px dashed var(--line-2);margin:2em 0}
.stream table{width:100%;border-collapse:collapse;font-size:16px}
.stream th,.stream td{border:1px solid var(--line-2);padding:10px 12px;text-align:left}
.stream code{font-size:16px;background:var(--layer-2);padding:1px 5px}
.is-hit{outline:1px solid var(--blue);outline-offset:10px}

/* ---------- 右栏 ---------- */
.rail{position:sticky;top:20px;display:grid;gap:16px}
.rail__block{
  padding:18px;background:var(--layer);border:1px solid var(--line);
  box-shadow:0 16px 38px rgba(0,0,0,.6);
}
.rail h2{font-family:var(--serif);font-size:1.16rem;color:#fff}
.subtitle{margin:.42em 0 0;font-size:16px;color:var(--gold);letter-spacing:.04em}
.rail__block > p{margin:.9em 0 0;color:var(--dim)}
.rail__list{list-style:none;margin:14px 0 0;padding:0}
.rail__list a{
  display:flex;align-items:center;gap:9px;min-height:44px;padding:4px 0;
  color:#c7c9d2;text-decoration:none;border-bottom:1px dotted var(--line-2);
}
.rail__list li:last-child a{border-bottom:0}
.rail__list a::before{content:"";width:5px;height:5px;flex:0 0 auto;background:#3d5f9c;transform:rotate(45deg)}
.rail__list a:hover{color:#fff}
.rail__list a:hover::before{background:var(--gold);box-shadow:0 0 10px var(--gold)}

/* ---------- 页脚 ---------- */
.foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 28px;
  max-width:1180px;margin:36px auto 0;padding:26px 18px 34px;border-top:1px solid var(--line);
}
.foot__brand{display:flex;align-items:center;gap:14px;flex:1 1 260px;min-width:0}
.foot__logo{
  font-family:var(--serif);font-size:18px;letter-spacing:.06em;color:#fff;
  text-decoration:none;white-space:nowrap;text-shadow:0 0 12px rgba(77,127,214,.4);
}
.foot__desc{margin:0;color:#6f7078;font-size:16px}
.foot__nav p{display:flex;flex-wrap:wrap;gap:2px 16px;margin:0}
.foot__nav a{display:inline-flex;align-items:center;min-height:40px;color:var(--dim);text-decoration:none;font-size:16px}
.foot__nav a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.foot__meta p{margin:0;color:#6f7078;font-size:16px}
.foot__meta p:first-child{color:#8d8e98}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .65s ease,transform .65s cubic-bezier(.2,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (max-width:1140px){
  body{padding-bottom:186px}
  .dock__in{
    grid-template-columns:1fr auto;grid-template-areas:"brand search" "navs navs";
    gap:6px 10px;padding:8px 12px;
  }
  .dock__brand{justify-self:start;padding-left:2px}
  .dock__search{justify-self:end}
  .dock__navs{
    grid-area:navs;display:flex;gap:2px;overflow-x:auto;
    scrollbar-width:none;padding-bottom:2px;
  }
  .dock__navs::-webkit-scrollbar{display:none}
  .dock__nav--l,.dock__nav--r{justify-self:start}
}
@media (max-width:960px){
  .cols{grid-template-columns:1fr;gap:32px;padding-bottom:24px}
  .rail{position:static}
}
@media (max-width:720px){
  .hero{grid-template-columns:1fr;min-height:0;gap:20px;padding:26px 16px 30px}
  .hero__copy{order:1}
  .hero__art{order:2;max-width:190px;justify-self:end}
  .hero__lead{margin-left:auto}
  .cols{padding-left:16px;padding-right:16px}
  .foot{flex-direction:column;align-items:flex-start;padding-left:16px;padding-right:16px}
  .foot__brand{flex:0 0 auto;flex-direction:column;align-items:flex-start;gap:6px}
  .foot__meta{width:100%;padding-top:10px;border-top:1px dashed var(--line-2)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .art{transform:none!important}
}

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