:root{
  --ink-900:#0B1020;
  --ink-800:#141B33;
  --ink-700:#1F2A4A;
  --line:#2E3A5C;
  --signal:#FF4D1A;
  --gold:#FFB300;
  --arc:#00E5FF;
  --ember:#FF8A5C;
  --text:#F4F6FB;
  --text-dim:#A8B2CC;
  --legacy:#6B7590;
  --radius-xl:28px;
  --radius-lg:22px;
  --radius-md:14px;
  --radius-pill:999px;
  --rail:216px;
  --gap:clamp(14px,2vw,26px);
  --pad:clamp(16px,4vw,40px);
  --shell:1240px;
  --header-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"Arial Narrow","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 24px);
}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink-900);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.55;
  letter-spacing:.006em;
  background-image:
    radial-gradient(900px 520px at 84% -8%,rgba(255,77,26,.16),transparent 68%),
    radial-gradient(760px 520px at 4% 6%,rgba(0,229,255,.10),transparent 70%),
    repeating-linear-gradient(90deg,rgba(46,58,92,.34) 0 1px,transparent 1px 88px),
    repeating-linear-gradient(0deg,rgba(46,58,92,.24) 0 1px,transparent 1px 88px);
  background-attachment:fixed,fixed,scroll,scroll;
}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit}
::selection{background:var(--signal);color:var(--ink-900)}

h1,h2,h3,h4{line-height:1.2;letter-spacing:-.01em}
h1{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:condensed;
  font-size:clamp(34px,5.4vw,64px);
  line-height:1.02;
  letter-spacing:-.02em;
}
h2{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(22px,2.8vw,32px);
  line-height:1.26;
}
h3{font-size:clamp(17px,1.7vw,21px);font-weight:700;line-height:1.3}
p{margin:0 0 .9em}
small{font-size:12px}

:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--arc);
  outline-offset:3px;
  border-radius:8px;
}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ===== 跳过链接 ===== */
.skip-link{
  position:absolute;
  left:12px;
  top:-80px;
  z-index:120;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 20px;
  background:var(--arc);
  color:#04121A;
  font-size:14px;
  font-weight:800;
  text-decoration:none;
  border-radius:0 0 14px 14px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:0;outline-offset:-2px}

/* ===== 头部命令栏 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,16,32,.93);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
}
.site-header__grid{
  display:grid;
  grid-template-columns:auto auto minmax(0,1fr) auto;
  grid-template-areas:"brand status nav actions";
  align-items:center;
  gap:clamp(10px,1.6vw,24px);
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:12px var(--pad);
  min-height:var(--header-h);
}

.brand{
  grid-area:brand;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:4px 6px;
  border-radius:var(--radius-md);
  color:var(--text);
  text-decoration:none;
}
.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:none;
  border-radius:12px;
  background:linear-gradient(150deg,var(--signal) 0%,#B32700 62%,#6C1B00 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.16),0 0 18px rgba(255,77,26,.45);
}
.brand__mark i{
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--ink-900);
}
.brand__mark i + i{width:9px;margin-top:5px;margin-left:-7px;background:#FFE0D4}
.brand__text{display:grid;gap:1px;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:condensed;
  font-size:17px;
  letter-spacing:.01em;
  line-height:1.1;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.2em;
  color:var(--text-dim);
  text-transform:uppercase;
}

.status-chip{
  grid-area:status;
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:28px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(0,229,255,.34);
  background:rgba(0,229,255,.09);
  color:#BFF7FF;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  white-space:nowrap;
}
.status-chip__dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--arc);
  box-shadow:0 0 9px var(--arc);
  animation:pulse-dot 2.4s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.45;transform:scale(.78)}
}

.primary-nav{
  grid-area:nav;
  min-width:0;
}
.primary-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  counter-reset:navidx;
}
.primary-nav__list li{counter-increment:navidx;display:flex}
.primary-nav__list a{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:9px 11px;
  border-radius:var(--radius-pill);
  color:var(--text-dim);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.primary-nav__list a::before{
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.04em;
  color:rgba(168,178,204,.55);
  transition:color .18s var(--ease);
}
.primary-nav__list a:hover{color:var(--text);background:var(--ink-700)}
.primary-nav__list a[aria-current="page"]{
  color:#fff;
  background:var(--ink-700);
  box-shadow:inset 3px 0 0 var(--signal);
}
.primary-nav__list a[aria-current="page"]::before{color:var(--signal)}

.cmd-actions{
  grid-area:actions;
  display:flex;
  align-items:center;
  gap:8px;
  justify-content:flex-end;
}

.pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:0 16px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.pill--solid{
  background:linear-gradient(135deg,var(--signal),#FF7A3D);
  color:#180804;
  box-shadow:0 12px 26px -16px rgba(255,77,26,.95);
}
.pill--solid:hover{transform:translateY(-1px);box-shadow:0 16px 30px -14px rgba(255,77,26,1)}
.pill--ghost{
  background:rgba(31,42,74,.5);
  border-color:var(--line);
  color:var(--text-dim);
}
.pill--ghost:hover{border-color:rgba(0,229,255,.55);color:var(--text)}

.cmd-trigger{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  flex:none;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:rgba(11,16,32,.7);
  color:var(--text-dim);
  text-decoration:none;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.cmd-trigger:hover{border-color:var(--arc);color:var(--arc);background:rgba(0,229,255,.08)}
.cmd-trigger__glyph{
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  line-height:1;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  min-height:40px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--ink-700);
  color:var(--text);
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  cursor:pointer;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:14px;
  height:10px;
  flex:none;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[data-open="true"] .nav-toggle__bars::before{transform:translateY(4px) rotate(45deg)}
.nav-toggle[data-open="true"] .nav-toggle__bars::after{transform:translateY(-4px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

.progress-track{
  position:relative;
  height:2px;
  background:linear-gradient(90deg,rgba(46,58,92,.9),rgba(46,58,92,.15));
}
.progress-track__fill{
  display:block;
  height:100%;
  width:var(--scroll-progress,0%);
  background:linear-gradient(90deg,var(--arc),var(--signal));
  box-shadow:0 0 12px rgba(255,77,26,.65);
  transition:width .12s linear;
}

/* ===== 通用容器与骨架 ===== */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.page-frame{
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  gap:clamp(20px,3vw,44px);
  align-items:start;
  padding-block:clamp(26px,4vw,52px);
}
.index-rail{
  position:sticky;
  top:calc(var(--header-h) + 18px);
  display:grid;
  gap:4px;
  padding:14px 12px;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(180deg,var(--ink-800),rgba(20,27,51,.62));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
}
.index-rail__title{
  padding:0 8px 8px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--text-dim);
  text-transform:uppercase;
}
.index-rail__list{display:grid;gap:2px}
.index-rail__list a{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:40px;
  padding:8px 10px;
  border-radius:12px;
  color:var(--text-dim);
  font-size:13.5px;
  font-weight:600;
  text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.index-rail__list a::before{
  content:"";
  width:6px;height:6px;
  flex:none;
  border-radius:50%;
  border:1.5px solid currentColor;
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.index-rail__list a:hover{background:var(--ink-700);color:var(--text)}
.index-rail__list a[aria-current="true"]{
  background:var(--ink-700);
  color:#fff;
  box-shadow:inset 3px 0 0 var(--signal);
}
.index-rail__list a[aria-current="true"]::before{
  background:var(--signal);
  border-color:var(--signal);
  box-shadow:0 0 10px var(--signal);
}

/* ===== 堆叠面板 ===== */
.panel{
  display:grid;
  gap:16px;
  padding:clamp(18px,2.4vw,30px);
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  background:var(--ink-800);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.045),0 26px 44px -34px rgba(0,0,0,.95);
}
.panel + .panel{margin-top:clamp(18px,2.6vw,32px)}
.panel__head{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 12px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.panel__index{
  padding:4px 9px;
  border:1px solid rgba(255,77,26,.35);
  border-radius:var(--radius-pill);
  background:rgba(255,77,26,.12);
  color:#FFB59A;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}
.panel__title{
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:condensed;
  font-size:clamp(20px,2.4vw,28px);
  letter-spacing:-.01em;
  line-height:1.15;
}
.panel__body{display:grid;gap:14px}
.panel--offset{margin-left:clamp(0px,3vw,36px)}
.panel--tilt{border-radius:var(--radius-xl) var(--radius-xl) var(--radius-xl) 6px}

/* ===== 刻度打断带 ===== */
.band{
  position:relative;
  display:grid;
  gap:10px;
  margin-block:clamp(20px,3vw,36px);
  padding:20px clamp(16px,2.4vw,28px) 26px;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(100deg,rgba(255,77,26,.16),rgba(0,229,255,.1) 70%,rgba(255,179,0,.08));
  overflow:hidden;
}
.band::before{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:10px;
  background-image:repeating-linear-gradient(90deg,rgba(244,246,251,.32) 0 1px,transparent 1px 12px);
}
.band__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--text-dim);
  text-transform:uppercase;
}
.band__title{
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:condensed;
  font-size:clamp(18px,2.2vw,24px);
  line-height:1.2;
}

/* ===== 刻度条 ===== */
.meter{display:grid;gap:8px}
.meter__top{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--text-dim);
}
.meter__track{
  height:10px;
  border-radius:var(--radius-pill);
  background:var(--ink-700);
  overflow:hidden;
  box-shadow:inset 0 0 0 1px rgba(46,58,92,.9);
}
.meter__fill{
  display:block;
  height:100%;
  width:var(--fill,0%);
  border-radius:inherit;
  background:linear-gradient(90deg,var(--arc),var(--signal));
}
.meter__fill--gold{background:linear-gradient(90deg,var(--gold),var(--signal))}

/* ===== 数据锚点 ===== */
.stat{display:grid;gap:3px}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.6vw,44px);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--text);
}
.stat__unit{
  margin-left:6px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--signal);
  white-space:nowrap;
}
.stat__label{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--text-dim);
}

/* ===== 状态胶囊 ===== */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:30px;
  padding:3px 11px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(31,42,74,.6);
  color:var(--text-dim);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.06em;
  white-space:nowrap;
}
.tag--signal{color:#FFD9CC;border-color:rgba(255,77,26,.5);background:rgba(255,77,26,.14)}
.tag--gold{color:#FFE7B0;border-color:rgba(255,179,0,.5);background:rgba(255,179,0,.14)}
.tag--arc{color:#C6F6FF;border-color:rgba(0,229,255,.45);background:rgba(0,229,255,.12)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:0 22px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{
  background:linear-gradient(135deg,var(--signal),#FF7A3D);
  color:#180804;
  box-shadow:0 16px 32px -18px rgba(255,77,26,.95);
}
.btn--primary:hover{transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:rgba(0,229,255,.55);color:#D9FBFF}
.btn--arc{background:rgba(0,229,255,.12);border-color:rgba(0,229,255,.5);color:#D6FBFF}
.btn--arc:hover{background:rgba(0,229,255,.2)}

/* ===== 面包屑 ===== */
.breadcrumb{padding-block:14px}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--text-dim);
}
.breadcrumb__list li{display:flex;align-items:center;gap:8px}
.breadcrumb__list li:not(:last-child)::after{content:"/";color:var(--line)}
.breadcrumb__list a{color:var(--text-dim);text-decoration:none}
.breadcrumb__list a:hover{color:var(--arc)}
.breadcrumb__list [aria-current="page"]{color:var(--text)}

/* ===== 图片容器基础（页面阶段放图或占位） ===== */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:
    radial-gradient(120% 90% at 20% 0%,rgba(0,229,255,.14),transparent 60%),
    linear-gradient(160deg,var(--ink-700),var(--ink-800));
}
.media-frame > img,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.04);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,16,32,0) 46%,rgba(11,16,32,.78));
}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame__caption{
  position:absolute;
  left:14px;
  right:14px;
  bottom:12px;
  z-index:1;
  padding-left:10px;
  border-left:2px solid var(--signal);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.05em;
  color:#DCE4F5;
}

/* ===== 正文排版 ===== */
.prose{
  max-width:68ch;
  color:#DDE3F2;
  font-size:16px;
  line-height:1.7;
  text-wrap:pretty;
}
.prose > * + *{margin-top:.9em}
.prose h2{margin-top:1.4em;color:var(--text)}
.prose h3{margin-top:1.2em;color:var(--text)}
.prose a{color:var(--arc);text-underline-offset:3px}
.prose a:hover{color:#8CF2FF}
.prose strong{color:#fff;font-weight:700}
.prose ul,.prose ol{padding-left:1.2em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose blockquote{
  margin:1.2em 0;
  padding:2px 0 2px 16px;
  border-left:3px solid var(--signal);
  color:var(--text-dim);
  font-family:var(--font-serif);
}
.prose code{
  padding:2px 6px;
  border-radius:6px;
  background:var(--ink-700);
  font-family:var(--font-mono);
  font-size:.88em;
  color:#FFD9CC;
}

/* ===== 网格 ===== */
.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--4-8{grid-template-columns:4fr 8fr}

/* ===== 显现动效 ===== */
[data-reveal]{transition:opacity .24s var(--ease),transform .24s var(--ease)}
.js [data-reveal]{opacity:0;transform:translateY(12px)}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(20,27,51,.92),var(--ink-900) 62%);
}
.site-footer__band{
  height:8px;
  background-image:repeating-linear-gradient(90deg,var(--signal) 0 3px,transparent 3px 16px);
  opacity:.55;
}
.site-footer__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(30px,5vw,56px) var(--pad) 0;
}
.site-footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,.9fr);
  gap:clamp(20px,3vw,40px);
  align-items:start;
  padding-bottom:clamp(24px,3vw,36px);
  border-bottom:1px solid var(--line);
}
.site-footer__intro{display:grid;gap:12px;justify-items:start}
.brand--footer{padding-left:0}
.brand--footer .brand__name{font-size:19px}
.site-footer__lede{
  max-width:46ch;
  color:#D5DCEC;
  font-family:var(--font-serif);
  font-size:15px;
  line-height:1.65;
}
.site-footer__note{
  max-width:46ch;
  font-size:12.5px;
  line-height:1.6;
  color:var(--text-dim);
}
.version-switch{
  display:grid;
  gap:8px;
  padding:16px;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:var(--ink-800);
  box-shadow:inset 0 0 40px rgba(0,229,255,.06);
}
.version-switch__title{
  margin:0 0 2px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--text-dim);
  text-transform:uppercase;
}
.version-switch__link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  min-height:44px;
  padding:8px 12px;
  border-radius:var(--radius-md);
  font-size:13px;
  font-weight:700;
  text-decoration:none;
  transition:border-color .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.version-switch__link--new{
  border:1px solid rgba(255,77,26,.45);
  background:rgba(255,77,26,.14);
  color:#FFD9CC;
}
.version-switch__link--new:hover{background:rgba(255,77,26,.24);border-color:var(--signal)}
.version-switch__link--old{
  border:1px solid rgba(107,117,144,.38);
  background:rgba(107,117,144,.12);
  color:var(--legacy);
}
.version-switch__link--old:hover{color:#AEB6CC;border-color:var(--legacy)}
.version-switch__ver{font-family:var(--font-mono);font-size:12px}

.site-footer__grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,2.6vw,28px);
  padding-block:clamp(24px,3vw,36px);
  border-bottom:1px solid var(--line);
}
.site-footer__col{display:grid;gap:10px;align-content:start}
.site-footer__col-title{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--text-dim);
  text-transform:uppercase;
}
.site-footer__links{display:grid;gap:8px}
.site-footer__links a{
  display:inline-block;
  padding-block:3px;
  color:#DEE4F2;
  font-size:14px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.site-footer__links a:hover{color:var(--arc);border-color:rgba(0,229,255,.6)}

.site-footer__contact{
  display:grid;
  gap:6px;
  padding-block:clamp(20px,2.6vw,28px);
  font-size:12.5px;
  line-height:1.6;
  color:var(--text-dim);
}
.site-footer__contact address{font-style:normal;color:#CBD4E8}
.site-footer__contact p{margin:0}

.site-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-block:18px 26px;
  border-top:1px solid var(--line);
  font-size:12px;
  color:var(--text-dim);
}
.site-footer__copyright{margin:0;font-family:var(--font-mono);letter-spacing:.03em}
.site-footer__legal-links{display:flex;flex-wrap:wrap;gap:16px}
.site-footer__legal-links a{
  color:var(--text-dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.site-footer__legal-links a:hover{color:var(--arc);border-color:rgba(0,229,255,.6)}

/* ===== 响应式 ===== */
@media (max-width:1180px){
  .status-chip{display:none}
  .site-header__grid{grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"brand nav actions"}
}
@media (max-width:1024px){
  .page-frame{grid-template-columns:minmax(0,1fr);gap:clamp(16px,3vw,26px)}
  .index-rail{
    position:static;
    display:block;
    padding:10px;
    overflow-x:auto;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .index-rail::-webkit-scrollbar{display:none}
  .index-rail__title{padding:0 6px 8px}
  .index-rail__list{display:flex;flex-wrap:nowrap;gap:6px}
  .index-rail__list a{white-space:nowrap;background:var(--ink-700)}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--5-7,.grid--4-8{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:860px){
  :root{--header-h:112px}
  .site-header__grid{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:"brand actions" "nav nav";
    gap:10px 12px;
    padding-block:10px 8px;
    min-height:0;
  }
  .nav-toggle{display:inline-flex}
  .cmd-trigger{display:none}
  .pill{padding:0 14px;font-size:12.5px}
  .primary-nav{
    display:block;
    overflow-x:auto;
    overscroll-behavior-x:contain;
    scrollbar-width:none;
    margin-inline:calc(var(--pad) * -1);
    padding-inline:var(--pad);
    padding-bottom:2px;
  }
  .primary-nav::-webkit-scrollbar{display:none}
  .primary-nav__list{flex-wrap:nowrap;gap:6px}
  .primary-nav__list a{
    align-items:center;
    min-height:40px;
    padding:0 14px;
    border:1px solid var(--line);
    border-radius:var(--radius-pill);
    background:rgba(20,27,51,.9);
  }
  .primary-nav__list a[aria-current="page"]{
    box-shadow:inset 0 0 0 1px rgba(255,77,26,.6);
    background:rgba(255,77,26,.16);
    color:#FFD9CC;
  }
  .primary-nav[data-open="true"]{overflow:visible}
  .primary-nav[data-open="true"] .primary-nav__list{
    flex-wrap:wrap;
    justify-content:flex-start;
    padding-top:4px;
  }
  .primary-nav[data-open="true"] .primary-nav__list a{flex:1 1 auto;justify-content:center}
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__top{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:720px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .panel--offset{margin-left:0}
  h1{font-size:clamp(30px,8vw,46px)}
}
@media (max-width:560px){
  .pill--ghost{display:none}
  .site-footer__grid{grid-template-columns:minmax(0,1fr)}
  .site-footer__legal{justify-content:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .progress-track__fill{transition:none}
  .status-chip__dot{animation:none}
}