/* ==========================================================================
   YD赛场 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 按钮 / 面包屑 / 正文 / 网格
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0}

:root{
  --ink:#07141B;
  --ink2:#101C22;
  --signal:#00C46A;
  --flash:#E9FF3F;
  --mist:#F7FAF7;
  --grid:#6F8579;
  --ice:#8FD8FF;
  --warn:#FF6B3D;
  --field:#0B5D3B;
  --black:#050708;

  --line-d:rgba(247,250,247,.16);
  --line-d-soft:rgba(247,250,247,.08);
  --line-l:rgba(7,20,27,.16);
  --line-l-soft:rgba(7,20,27,.08);
  --mist-dim:rgba(247,250,247,.72);
  --ink-dim:rgba(7,20,27,.66);

  --font-display:"Oswald","Barlow Condensed","Arial Narrow","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;

  --shell:1560px;
  --gutter:clamp(16px,3.2vw,44px);
  --header-h:74px;
  --radius:0px;
}

html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden}

h1,h2,h3,h4{font-weight:700;line-height:1.15}
p,li,dd{text-wrap:pretty}
strong,b{font-weight:700;color:var(--mist)}

:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
#main-content{display:block}
#main-content:focus-visible{outline:2px solid var(--signal);outline-offset:-4px}

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

/* ---------- 布局基元 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(36px,5.5vw,84px)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,2vw,28px)}
.grid-auto{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:clamp(14px,2vw,24px)}
.rule{height:1px;background:var(--line-d);border:0;margin:0}
.rule--light{background:var(--line-l)}
.mono{font-family:var(--font-mono)}
.dim{color:var(--mist-dim)}
.center{text-align:center}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:16px;top:-120px;z-index:200;
  display:inline-block;
  background:var(--flash);color:var(--ink);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;
  padding:10px 18px;border:1px solid var(--black);
  transition:top .18s ease;
}
.skip-link:focus{top:14px;outline:2px solid var(--signal);outline-offset:2px}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid var(--line-d);
}
.site-header::before{
  content:"";display:block;height:3px;
  background:linear-gradient(90deg,var(--signal) 0 22%,var(--flash) 22% 27%,rgba(247,250,247,.14) 27% 100%);
}
.site-header__bar{
  display:flex;align-items:stretch;
  gap:clamp(10px,1.6vw,26px);
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
}

.brand{
  display:flex;align-items:center;gap:10px;
  flex:0 0 auto;
  padding-right:clamp(12px,2vw,26px);
  border-right:1px solid var(--line-d);
  color:var(--mist);
  transition:color .18s ease;
}
.brand:hover{color:var(--mist)}
.brand__mark{
  width:14px;height:14px;flex:none;
  background:var(--signal);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  box-shadow:0 0 16px rgba(0,196,106,.55);
}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;font-size:22px;line-height:1;
  letter-spacing:.02em;text-transform:uppercase;
  white-space:nowrap;
}
.brand__ver{
  font-family:var(--font-mono);
  font-size:11px;line-height:1.5;letter-spacing:.1em;
  color:var(--signal);
  border:1px solid rgba(0,196,106,.5);
  padding:0 5px;
  white-space:nowrap;
}
.brand__dot{
  width:7px;height:7px;flex:none;
  background:var(--signal);
  animation:yd-pulse 2.6s ease-in-out infinite;
}
@keyframes yd-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.4;transform:scale(.72)}
}

.header-rail{
  flex:1 1 auto;min-width:26px;
  align-self:center;height:14px;
  background:repeating-linear-gradient(90deg,var(--line-d) 0 1px,transparent 1px 12px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);
}

.site-nav{flex:0 0 auto;display:flex;align-items:stretch}
.site-nav__list{display:flex;align-items:stretch;counter-reset:nav}
.site-nav__item{display:flex}
.site-nav__link{
  position:relative;
  display:flex;align-items:center;
  padding:0 clamp(9px,1vw,17px);
  font-size:15px;font-weight:500;line-height:1.2;
  color:var(--mist-dim);
  border-left:1px solid var(--line-d-soft);
  white-space:nowrap;
  transition:color .18s ease,background-color .18s ease;
}
.site-nav__item:first-child .site-nav__link{border-left:0}
.site-nav__link::after{
  content:"";position:absolute;left:50%;bottom:16px;
  width:0;height:2px;background:var(--flash);
  transform:translateX(-50%);
  transition:width .2s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--mist);background:rgba(0,196,106,.08)}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{width:16px}
.site-nav__link[aria-current="page"]{
  color:var(--flash);
  background:rgba(233,255,63,.07);
}
.site-nav__link[aria-current="page"]::after{width:22px;background:var(--flash)}
.site-nav__quick{display:none}

.header-actions{
  display:flex;align-items:center;gap:8px;
  flex:0 0 auto;
  padding-left:clamp(10px,1.6vw,22px);
  border-left:1px solid var(--line-d);
}

.nav-toggle{
  display:none;align-items:center;gap:12px;
  margin-left:auto;
  padding:0 2px 0 16px;
  border-left:1px solid var(--line-d);
  color:var(--mist);
  font-family:var(--font-mono);font-size:11px;
  letter-spacing:.16em;text-transform:uppercase;
}
.nav-toggle__bars{display:grid;gap:4px;width:20px}
.nav-toggle__bars i{
  display:block;height:2px;background:var(--flash);
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--mist);
  --btn-bd:var(--line-d);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  background:var(--btn-bg);color:var(--btn-fg);
  border:1px solid var(--btn-bd);
  font-family:var(--font-display);
  font-weight:600;font-size:14px;line-height:1.2;
  letter-spacing:.06em;text-transform:uppercase;
  text-align:center;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{--btn-bg:var(--signal);--btn-fg:var(--ink);--btn-bd:var(--signal);font-weight:700}
.btn--primary:hover{--btn-bg:#00dd79;--btn-bd:#00dd79}
.btn--flash{--btn-bg:var(--flash);--btn-fg:var(--ink);--btn-bd:var(--flash);font-weight:700}
.btn--flash:hover{--btn-bg:#f3ff68;--btn-bd:#f3ff68}
.btn--ghost{--btn-bg:transparent;--btn-fg:var(--mist);--btn-bd:rgba(247,250,247,.3)}
.btn--ghost:hover{--btn-bg:rgba(247,250,247,.1);--btn-bd:var(--mist)}
.btn--light{--btn-bg:var(--ink);--btn-fg:var(--mist);--btn-bd:var(--ink)}
.btn--light:hover{--btn-bg:var(--field);--btn-bd:var(--field)}
.btn--sm{padding:8px 13px;font-size:12px}
.btn--block{width:100%}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--ice);
  border-bottom:1px solid rgba(143,216,255,.4);
  padding-bottom:2px;
  transition:color .18s ease,border-color .18s ease;
}
.text-link:hover{color:var(--signal);border-color:var(--signal)}

/* ---------- 面板 ---------- */
.panel{
  position:relative;
  background:var(--ink2);
  border:1px solid var(--line-d);
  padding:clamp(20px,2.8vw,36px);
}
.panel--light{background:var(--mist);color:var(--ink);border-color:var(--line-l)}
.panel--light strong,.panel--light b{color:var(--ink)}
.panel--signal{background:var(--signal);color:var(--ink);border-color:var(--signal)}
.panel--signal strong,.panel--signal b{color:var(--ink)}
.panel--flush{padding:0}
.panel--stack{
  box-shadow:10px 10px 0 0 var(--ink),11px 11px 0 0 var(--line-d);
}
.panel--light.panel--stack{
  box-shadow:10px 10px 0 0 var(--ink),11px 11px 0 0 rgba(247,250,247,.22);
}

/* ---------- 标题与标签 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11px;line-height:1.4;letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--signal);
}
.eyebrow::before{content:"";width:18px;height:1px;background:currentColor;flex:none}
.eyebrow--flash{color:var(--flash)}
.eyebrow--muted{color:var(--grid)}
.eyebrow--ink{color:#0A8F52}

.display{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(44px,8vw,104px);
  line-height:.92;
  letter-spacing:-.02em;
  text-transform:uppercase;
}
.h2{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(28px,4vw,52px);
  line-height:1.02;
  letter-spacing:-.015em;
}
.h3{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(20px,2.4vw,28px);
  line-height:1.16;
  letter-spacing:0;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}

.index-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;line-height:1.5;letter-spacing:.14em;
  text-transform:uppercase;
  padding:3px 8px;
  border:1px solid currentColor;
  color:var(--signal);
}
.index-tag--flash{color:var(--flash)}
.index-tag--warn{color:var(--warn)}
.index-tag--ice{color:var(--ice)}
.index-tag--muted{color:var(--grid)}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);
  font-size:11px;line-height:1.6;letter-spacing:.08em;
  text-transform:uppercase;
  padding:4px 9px;
  border:1px solid var(--line-d);
  color:var(--mist-dim);
  white-space:nowrap;
}
.chip--signal{border-color:rgba(0,196,106,.5);color:var(--signal)}
.chip--flash{border-color:rgba(233,255,63,.5);color:var(--flash)}
.chip--warn{border-color:rgba(255,107,61,.55);color:var(--warn)}
.chip--ice{border-color:rgba(143,216,255,.5);color:var(--ice)}
.chip--solid{background:var(--flash);border-color:var(--flash);color:var(--ink);font-weight:600}

/* ---------- 数据单元 ---------- */
.stat{margin:0;display:block}
.stat__value{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(32px,4.6vw,60px);
  line-height:1;font-weight:600;
  color:var(--signal);
}
.stat__unit{font-size:.5em;margin-left:4px;color:var(--mist-dim);font-weight:400}
.stat__label{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--grid);
}
.panel--light .stat__unit{color:var(--ink-dim)}
.panel--light .stat__label{color:#5C6F64}

/* ---------- 旁注 ---------- */
.note{
  margin:0;
  font-size:13px;line-height:1.72;
  color:var(--mist-dim);
  border-left:2px solid var(--signal);
  padding:2px 0 2px 14px;
}
.note--flash{border-left-color:var(--flash)}
.note--muted{border-left-color:var(--grid);color:var(--grid)}
.panel--light .note{color:#4B5A52;border-left-color:#0A8F52}
.panel--light .note--flash{border-left-color:#8A9A00}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  --bc-fg:var(--grid);
  --bc-link:var(--mist-dim);
  --bc-cur:var(--flash);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12px;line-height:1.5;letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--bc-fg);
  padding:14px 0;
}
.breadcrumbs a{color:var(--bc-link);transition:color .16s ease}
.breadcrumbs a:hover{color:var(--signal)}
.breadcrumbs__sep{opacity:.55}
.breadcrumbs [aria-current="page"]{color:var(--bc-cur)}
.breadcrumbs--ink{--bc-fg:#5C6F64;--bc-link:var(--ink);--bc-cur:#7E8C00}

/* ---------- 正文容器 ---------- */
.prose{
  max-width:68ch;
  font-size:16px;line-height:1.85;
  color:var(--mist-dim);
}
.prose > * + *{margin-top:1.1em}
.prose h2,.prose h3{color:var(--mist);margin-top:1.8em}
.prose h2{font-family:var(--font-display);font-size:clamp(24px,2.6vw,32px);line-height:1.15;letter-spacing:0}
.prose h3{font-family:var(--font-display);font-size:clamp(19px,2vw,23px);line-height:1.25}
.prose ul,.prose ol{padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose a{color:var(--ice);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--signal)}
.prose strong{color:var(--mist)}
.prose--ink{color:#3A4842}
.prose--ink h2,.prose--ink h3,.prose--ink strong{color:var(--ink)}
.prose--ink a{color:#0A6E96}
.prose--ink a:hover{color:#0A8F52}

/* ---------- 图片容器基础（页面阶段放置占位） ---------- */
.figure{margin:0}
.figure figcaption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;line-height:1.6;letter-spacing:.1em;text-transform:uppercase;
  color:var(--grid);
}
.media-frame{
  position:relative;display:block;width:100%;
  aspect-ratio:16/9;
  background:var(--ink2);
  border:1px solid var(--line-d);
  overflow:hidden;
}
.media-frame > img,.media-frame > picture > img{
  width:100%;height:100%;object-fit:cover;display:block;
}
.media-frame--square{aspect-ratio:1/1}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--grid{
  background-image:
    linear-gradient(var(--line-d-soft) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-d-soft) 1px,transparent 1px);
  background-size:32px 32px;
}
.panel--light .media-frame{background:var(--ink)}

/* ---------- 显现 ---------- */
.reveal{transition:opacity .5s ease,transform .5s ease}
html.has-reveal .reveal{opacity:0;transform:translateY(10px)}
html.has-reveal .reveal.is-in{opacity:1;transform:none}

/* ---------- 脚本注入组件 ---------- */
.scroll-progress{
  position:fixed;left:0;right:0;top:0;height:3px;z-index:100;
  pointer-events:none;background:transparent;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:var(--signal);
  box-shadow:0 0 14px rgba(0,196,106,.7);
  transition:transform .1s linear;
}
.to-top{
  position:fixed;
  right:clamp(14px,2vw,30px);
  bottom:clamp(14px,2vw,30px);
  z-index:90;
  display:inline-flex;align-items:center;justify-content:center;
  width:54px;height:54px;
  background:var(--ink);
  color:var(--flash);
  border:1px solid var(--line-d);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  box-shadow:6px 6px 0 0 var(--ink),7px 7px 0 0 var(--line-d);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,background-color .2s ease,color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--signal);color:var(--ink);border-color:var(--signal)}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  background:var(--ink);
  color:var(--mist);
  border-top:1px solid var(--line-d);
}
.site-footer::before{
  content:"";display:block;height:3px;
  background:linear-gradient(90deg,var(--flash) 0 7%,var(--signal) 7% 30%,rgba(247,250,247,.14) 30% 100%);
}
.site-footer__inner{
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  padding-bottom:clamp(16px,2vw,24px);
}
.site-footer__top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);
  gap:clamp(28px,4vw,72px);
  padding-block:clamp(34px,4.6vw,62px) clamp(26px,3.4vw,42px);
}
.brand--footer{
  display:inline-flex;
  padding:0;border-right:0;
  margin-bottom:18px;
}
.site-footer__line{
  font-family:var(--font-display);
  font-size:clamp(18px,2vw,24px);
  line-height:1.36;
  letter-spacing:.01em;
  color:var(--mist);
  max-width:26ch;
}
.site-footer__chips{
  display:flex;flex-wrap:wrap;gap:8px;
  margin-top:20px;
}
.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;line-height:1.5;letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--grid);
  font-weight:500;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-d);
  margin-bottom:14px;
}
.footer-col__list{display:grid;gap:10px}
.footer-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;line-height:1.5;
  color:var(--mist-dim);
  transition:color .16s ease,transform .16s ease;
}
.footer-link::before{
  content:"";width:6px;height:1px;flex:none;
  background:var(--grid);
  transition:width .16s ease,background-color .16s ease;
}
.footer-link:hover{color:var(--signal);transform:translateX(2px)}
.footer-link:hover::before{width:14px;background:var(--signal)}

.site-footer__meta{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
  padding-top:clamp(20px,2.6vw,30px);
  border-top:1px solid var(--line-d-soft);
}
.meta-item{min-width:0}
.meta-item__label{
  font-family:var(--font-mono);
  font-size:11px;line-height:1.5;letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--grid);
  margin-bottom:6px;
}
.meta-item__value{
  font-size:15px;line-height:1.6;
  color:var(--mist);
  word-break:break-word;
}
.meta-item__value--mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.site-footer__note{
  grid-column:1 / -1;
  max-width:62ch;
  font-size:13px;line-height:1.7;
  color:var(--grid);
  border-left:2px solid var(--field);
  padding-left:14px;
}

.site-footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(22px,3vw,34px);
  padding-top:18px;
  border-top:1px solid var(--line-d-soft);
  font-family:var(--font-mono);
  font-size:12px;line-height:1.6;letter-spacing:.06em;
  color:var(--grid);
}
.site-footer__copy{color:var(--grid)}
.site-footer__icp{color:var(--grid)}
.site-footer__legal{
  display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px;
  color:var(--grid);
}
.site-footer__legal a{color:var(--mist-dim);transition:color .16s ease}
.site-footer__legal a:hover{color:var(--flash)}
.site-footer__legal span{opacity:.5}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1279px) and (min-width:1100px){
  .site-nav__link{padding:0 10px;font-size:14px}
  .header-actions .btn{padding:8px 12px;font-size:12px}
  .brand__ver{display:none}
}

@media (max-width:1099px){
  :root{--header-h:58px}

  .site-header__bar{justify-content:space-between;gap:12px}
  .header-rail,.header-actions{display:none}
  .nav-toggle{display:flex}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:70;
    display:flex;flex-direction:column;
    padding:calc(var(--header-h) + 26px) var(--gutter) 0;
    background:var(--ink);
    border-top:1px solid var(--line-d);
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-6px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .site-nav::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(var(--line-d-soft) 1px,transparent 1px),
      linear-gradient(90deg,var(--line-d-soft) 1px,transparent 1px);
    background-size:48px 48px;
    opacity:.55;
  }
  .site-nav[data-open="true"]{
    opacity:1;visibility:visible;pointer-events:auto;
    transform:none;
  }
  .site-nav__list{
    position:relative;z-index:1;
    display:flex;flex-direction:column;
    counter-reset:nav;
  }
  .site-nav__item{
    counter-increment:nav;
    display:block;
    border-top:1px solid var(--line-d-soft);
  }
  .site-nav__item:last-child{border-bottom:1px solid var(--line-d-soft)}
  .site-nav__link{
    width:100%;
    display:flex;align-items:center;gap:16px;
    padding:15px 0;
    border-left:0;
    font-family:var(--font-display);
    font-size:clamp(21px,5.4vw,29px);
    font-weight:700;
    letter-spacing:.01em;
    color:var(--mist);
    background:none;
  }
  .site-nav__link::before{
    content:counter(nav,decimal-leading-zero);
    min-width:24px;
    font-family:var(--font-mono);
    font-size:11px;font-weight:400;letter-spacing:.1em;
    color:var(--signal);
  }
  .site-nav__link::after{display:none}
  .site-nav__link:hover,
  .site-nav__link:focus-visible{background:rgba(0,196,106,.08)}
  .site-nav__link[aria-current="page"]{
    color:var(--flash);
    background:rgba(233,255,63,.07);
    box-shadow:inset 2px 0 0 var(--flash);
    padding-left:12px;
  }
  .site-nav__link[aria-current="page"]::before{color:var(--flash)}

  .site-nav__quick{
    position:sticky;bottom:0;z-index:2;
    display:grid;grid-template-columns:1fr 1fr;gap:1px;
    margin-top:auto;
    padding:18px 0 max(22px,env(safe-area-inset-bottom));
    background:var(--ink);
    border-top:1px solid var(--line-d);
  }

  .site-footer__top{grid-template-columns:minmax(0,1fr)}
  .site-footer__nav{grid-template-columns:repeat(3,minmax(0,1fr))}
  .site-footer__meta{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:860px){
  .site-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__meta{grid-template-columns:minmax(0,1fr)}
  .site-footer__bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
}

@media (max-width:520px){
  .site-footer__nav{grid-template-columns:minmax(0,1fr)}
  .brand__name{font-size:19px}
  .brand__ver{display:none}
  .site-nav__quick{grid-template-columns:1fr}
  .btn{padding:10px 16px}
  .to-top{width:48px;height:48px;font-size:10px}
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ==========================================================================
   偏好与打印
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  html.has-reveal .reveal{opacity:1;transform:none}
  .btn:hover,.footer-link:hover,.to-top{transform:none}
}

@media print{
  body{background:#fff;color:#000}
  .site-header,.site-footer,.to-top,.scroll-progress,.skip-link{display:none!important}
  .panel{border:1px solid #999;box-shadow:none}
  a{text-decoration:underline}
}