/* =========================================================
   天博全站 · 共享样式 /assets/site.css
   1 变量与重置  2 排版  3 通用组件  4 页头  5 页脚  6 响应式
   ========================================================= */

/* ---------- 1. 变量与重置 ---------- */
:root{
  --ink:#07130F;
  --pitch:#0B2B22;
  --board:#14503F;
  --volt:#E8FF3A;
  --lime:#C6F000;
  --cyan:#26F0C8;
  --red:#FF4D4D;
  --amber:#FFC42E;
  --paper:#F2F4EF;
  --ink-2:#101A16;
  --muted:#8FA39A;

  --line:rgba(242,244,239,.14);
  --line-soft:rgba(242,244,239,.08);
  --line-volt:rgba(232,255,58,.45);

  --font-head:"Barlow Condensed","Oswald","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --max:1240px;
  --gutter:clamp(16px,4vw,40px);
  --cut:14px;
  --cut-sm:8px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --rail-top:1.5rem;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:0}

body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

::selection{background:var(--volt);color:var(--ink)}

:focus-visible{
  outline:2px solid var(--volt);
  outline-offset:3px;
  border-radius:var(--radius);
}

#main-content{scroll-margin-top:160px;display:block}

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

.skip-link{
  position:absolute;left:var(--gutter);top:-100px;z-index:200;
  display:inline-block;padding:10px 18px;
  background:var(--volt);color:var(--ink);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 2. 排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.16;
  letter-spacing:.005em;
}
h1{font-size:clamp(34px,5.2vw,60px)}
h2{font-size:clamp(26px,3.4vw,38px)}
h3{font-size:clamp(20px,2.2vw,24px)}
h4{font-size:clamp(17px,1.8vw,20px)}
p{max-width:66ch}
strong{font-weight:700;color:var(--paper)}
small{font-size:13px}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--lime);
}
.eyebrow::before{
  content:"";width:18px;height:2px;background:var(--volt);display:inline-block;
}
.link-underline{
  color:var(--volt);
  border-bottom:1px solid var(--line-volt);
  padding-bottom:1px;
}
.link-underline:hover{border-bottom-color:var(--volt)}

/* ---------- 3. 通用组件 ---------- */
.container{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.divider{height:1px;background:var(--line);margin-block:clamp(24px,3vw,40px)}
.divider--slash{
  height:10px;background:none;border:0;
  background-image:repeating-linear-gradient(104deg,var(--line-volt) 0 2px,transparent 2px 12px);
  opacity:.75;
}

/* 页面骨架 */
.page-shell{display:block;padding-block:clamp(28px,4vw,56px)}
.page-shell--wide{display:block}
.index-rail{
  display:none;
}
@media (min-width:1024px){
  .page-shell{
    display:grid;
    grid-template-columns:minmax(200px,240px) minmax(0,1fr);
    gap:clamp(24px,3.4vw,52px);
    align-items:start;
  }
  .page-shell--wide{grid-template-columns:minmax(0,1fr)}
  .index-rail{
    display:block;
    border-left:2px solid var(--line);
    padding-left:16px;
  }
  .index-rail--sticky{
    position:sticky;
    top:var(--rail-top);
  }
}
.index-rail__title{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:12px;
}
.toc{display:flex;flex-direction:column;gap:2px}
.toc__link{
  display:block;
  padding:8px 10px 8px 12px;
  font-size:14px;
  color:rgba(242,244,239,.72);
  border-left:2px solid transparent;
  margin-left:-18px;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.toc__link:hover{color:var(--paper);background:rgba(20,80,63,.35)}
.toc__link[aria-current="true"]{
  color:var(--ink);
  background:var(--volt);
  border-left-color:var(--lime);
  font-weight:700;
}

/* 面包屑 */
.breadcrumb{margin-bottom:clamp(16px,2vw,26px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__sep{color:rgba(143,163,154,.6)}
.breadcrumb__link{color:rgba(242,244,239,.75);border-bottom:1px solid transparent}
.breadcrumb__link:hover{color:var(--volt);border-bottom-color:var(--line-volt)}
.breadcrumb__link[aria-current="page"]{color:var(--volt);border-bottom:0}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 26px;
  font-family:var(--font-head);
  font-size:16px;font-weight:700;letter-spacing:.1em;
  border:1px solid transparent;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--volt{background:var(--volt);color:var(--ink)}
.btn--volt:hover{background:var(--lime)}
.btn--ghost{
  background:transparent;color:var(--volt);
  border-color:var(--line-volt);
  box-shadow:inset 0 0 0 1px rgba(232,255,58,.06);
}
.btn--ghost:hover{background:rgba(232,255,58,.1);color:var(--volt)}
.btn--sm{padding:9px 18px;font-size:14px;letter-spacing:.08em}

/* 面板 */
.panel{
  position:relative;
  background:linear-gradient(158deg,var(--pitch),var(--ink) 88%);
  border:1px solid var(--line);
  padding:clamp(20px,2.4vw,28px);
  border-radius:var(--radius);
}
.panel--cut{
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  border-color:rgba(38,240,200,.18);
}
.panel--paper{
  background:var(--paper);
  color:var(--ink-2);
  border-color:rgba(16,26,22,.12);
}
.panel--paper p{color:#2A3A33}
.panel__title{
  font-family:var(--font-head);
  font-size:clamp(19px,2vw,23px);
  margin-bottom:10px;
}

/* 标签 */
.chip,.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;
  padding:4px 10px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  color:rgba(242,244,239,.85);
}
.tag--volt{background:var(--volt);color:var(--ink);border-color:var(--volt);font-weight:700}
.tag--cyan{color:var(--cyan);border-color:rgba(38,240,200,.5)}
.tag--red{background:rgba(255,77,77,.16);color:#FF8A8A;border-color:rgba(255,77,77,.55)}
.tag--amber{background:rgba(255,196,46,.16);color:var(--amber);border-color:rgba(255,196,46,.5)}

/* 数据块 */
.stat{display:flex;flex-direction:column;gap:4px}
.stat__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1;
  color:var(--volt);
  letter-spacing:-.01em;
}
.stat__label{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);
}

/* 数据表 */
.data-table{width:100%;font-size:14px}
.data-table caption{
  text-align:left;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.14em;color:var(--muted);padding-bottom:10px;
}
.data-table th,.data-table td{
  padding:11px 14px;text-align:left;
  border-bottom:1px solid var(--line-soft);
  vertical-align:top;
}
.data-table thead th{
  background:var(--board);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  border-bottom:1px solid rgba(232,255,58,.35);
}
.data-table tbody tr:hover{background:rgba(20,80,63,.35)}
.data-table td.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* 可展开组 */
.disclosure{
  border:1px solid var(--line);
  background:rgba(20,80,63,.26);
  border-radius:var(--radius);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.disclosure+.disclosure{margin-top:10px}
.disclosure__summary{
  display:flex;align-items:center;gap:12px;
  padding:16px 20px;
  cursor:pointer;
  list-style:none;
  font-family:var(--font-head);
  font-size:clamp(16px,1.8vw,19px);
  letter-spacing:.03em;
}
.disclosure__summary::-webkit-details-marker{display:none}
.disclosure__summary::before{
  content:"+";
  font-family:var(--font-mono);
  color:var(--volt);
  width:1.2ch;flex:none;
}
.disclosure[open] .disclosure__summary::before{content:"–"}
.disclosure[open]{
  border-color:var(--line-volt);
  box-shadow:inset 3px 0 0 var(--volt);
}
.disclosure__body{
  padding:0 20px 18px 20px;
  font-size:15px;
  color:rgba(242,244,239,.82);
}

/* 图片容器基础规则 */
.media-frame{
  position:relative;
  width:100%;
  aspect-ratio:var(--media-ratio,16/9);
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    repeating-linear-gradient(118deg,rgba(38,240,200,.10) 0 2px,transparent 2px 11px),
    linear-gradient(154deg,var(--board),var(--ink) 82%);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.media-frame__img{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.05);
}
.media-frame--tall{--media-ratio:4/5}
.media-frame--square{--media-ratio:1/1}
.media-frame--wide{--media-ratio:21/9}

/* 网格工具 */
.grid{display:grid;gap:clamp(16px,2vw,26px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.split{display:grid;gap:clamp(20px,3vw,40px);align-items:start}
@media (min-width:900px){
  .split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}
}

/* 主题带 */
.section{padding-block:clamp(36px,5vw,72px)}
.section--paper{background:var(--paper);color:var(--ink-2)}
.section--paper h2,.section--paper h3{color:var(--ink-2)}
.section--paper p{color:#2A3A33}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:clamp(20px,2.6vw,32px);
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.section--paper .section__head{border-bottom-color:rgba(16,26,22,.15)}

/* ---------- 4. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--line);
}

/* 顶部信息带 */
.header-utility{
  background:var(--pitch);
  border-bottom:1px solid var(--line-soft);
}
.header-utility__inner{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:34px;
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.1em;
  color:var(--muted);
}
.utility-meta{
  display:inline-flex;align-items:center;gap:8px;
  color:rgba(242,244,239,.8);
  max-width:none;
}
.ticker-dot{
  width:7px;height:7px;flex:none;
  background:var(--volt);
  display:inline-block;
  animation:pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.35;transform:scale(.7)}
}
.utility-list{display:flex;align-items:center;gap:0}
.utility-item{
  padding-inline:14px;
  border-left:1px solid var(--line-soft);
  color:rgba(242,244,239,.62);
}
.utility-note{max-width:none;color:rgba(143,163,154,.9)}

/* 报头 */
.masthead{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  padding-block:18px 16px;
}
.masthead__meta{
  justify-self:start;
  max-width:none;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.16em;
  color:var(--muted);
  line-height:1.6;
  text-transform:uppercase;
}
.masthead__meta-line{
  display:block;
  color:rgba(242,244,239,.55);
}
.masthead__cta{justify-self:end}
.nav-toggle{display:none}

.brand{
  justify-self:center;
  display:inline-flex;align-items:center;gap:12px;
  transition:opacity .18s var(--ease);
}
.brand:hover{opacity:.88}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;
  background:var(--volt);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:16px;font-weight:700;letter-spacing:.02em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  flex:none;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__cn{
  font-family:var(--font-head);
  font-size:clamp(22px,2.6vw,29px);
  font-weight:700;
  letter-spacing:.06em;
  color:var(--paper);
}
.brand__tag{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--lime);
  text-transform:uppercase;
}

/* 导航 */
.site-nav{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,43,34,.9),var(--ink));
}
.site-nav__list{
  display:flex;
  justify-content:center;
  align-items:stretch;
  flex-wrap:wrap;
}
.site-nav__item{display:flex}
.site-nav__link{
  position:relative;
  display:inline-flex;align-items:center;
  padding:11px 20px;
  font-family:var(--font-head);
  font-size:15.5px;
  font-weight:700;
  letter-spacing:.14em;
  color:rgba(242,244,239,.78);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.site-nav__link::before{
  content:"";
  position:absolute;left:50%;bottom:0;
  width:0;height:2px;
  background:var(--volt);
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.site-nav__link:hover{color:var(--volt);background:rgba(20,80,63,.4)}
.site-nav__link:hover::before{width:60%}
.site-nav__link[aria-current="page"]{
  color:var(--ink);
  background:var(--volt);
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px));
}
.site-nav__link[aria-current="page"]::before{display:none}
.site-nav__link[aria-current="page"]:hover{background:var(--lime);color:var(--ink)}

/* 快速筛选条 */
.filter-strip{
  border-top:1px solid var(--line-soft);
  background:var(--pitch);
}
.filter-strip__inner{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:46px;
  padding-block:7px;
}
.filter-strip__label{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);
  white-space:nowrap;
  flex:none;
}
.filter-strip__chips{
  display:flex;
  gap:8px;
  overflow-x:auto;
  scrollbar-width:thin;
  padding-bottom:2px;
  flex:1 1 auto;
}
.filter-chip{
  flex:none;
  padding:6px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(242,244,239,.78);
  border:1px solid var(--line);
  border-radius:var(--radius);
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  clip-path:polygon(0 0,calc(100% - 7px) 0,100% 7px,100% 100%,7px 100%,0 calc(100% - 7px));
}
.filter-chip:hover{
  color:var(--volt);
  border-color:var(--line-volt);
  background:rgba(232,255,58,.08);
}
.filter-chip[aria-pressed="true"]{
  background:var(--volt);
  border-color:var(--volt);
  color:var(--ink);
  font-weight:700;
}
.filter-strip__count{
  flex:none;
  max-width:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--lime);
}
.filter-strip__count:empty{display:none}

/* 阅读进度 */
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:3px;
  background:rgba(242,244,239,.1);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--volt) 45%,var(--cyan));
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,6vw,88px);
  background:var(--ink);
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;top:-1px;left:0;
  width:clamp(90px,18vw,220px);
  height:3px;
  background:var(--volt);
}
.footer-inner{
  display:grid;
  gap:clamp(28px,4vw,48px);
  padding-block:clamp(36px,5vw,64px) clamp(24px,3vw,36px);
}
@media (min-width:900px){
  .footer-inner{
    grid-template-columns:minmax(250px,1fr) minmax(0,1.75fr);
    align-items:start;
  }
  .footer-contact{grid-column:1 / -1}
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.brand--footer{justify-self:start}
.brand--footer .brand__cn{font-size:clamp(24px,2.8vw,32px)}
.footer-brand__tag{
  max-width:32ch;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}

.footer-grid{
  display:grid;
  gap:clamp(20px,3vw,32px);
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lime);
  margin-bottom:14px;
  padding-bottom:8px;
  border-bottom:1px solid var(--line-soft);
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links__item{display:flex}
.footer-link{
  font-size:14.5px;
  color:rgba(242,244,239,.75);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-link::after{content:"";display:inline-block;width:0}
.footer-link:hover{color:var(--volt);transform:translateX(3px)}
.footer-link[aria-current="page"]{color:var(--volt);font-weight:700}

.footer-contact{
  display:grid;
  gap:12px;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  padding-top:clamp(20px,2.6vw,28px);
  border-top:1px solid var(--line);
}
.contact-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding:12px 16px;
  background:rgba(20,80,63,.28);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
}
.contact-row__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
  flex:none;
}
.contact-row__value{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--paper);
  word-break:break-all;
  flex:1 1 auto;
}
.copy-btn{
  flex:none;
  padding:3px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--volt);
  border:1px solid var(--line-volt);
  border-radius:var(--radius);
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.copy-btn:hover{background:var(--volt);color:var(--ink)}
.copy-btn[data-copy-state="done"]{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.footer-note{
  grid-column:1 / -1;
  max-width:70ch;
  font-size:13px;
  color:var(--muted);
  line-height:1.75;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-block:16px 24px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.footer-legal,.footer-copy{max-width:none}
.footer-copy{color:rgba(143,163,154,.8)}

/* ---------- 6. 响应式 ---------- */
@media (max-width:900px){
  .header-utility__inner{justify-content:space-between}
  .utility-list{display:none}
  .masthead{
    grid-template-columns:auto 1fr auto;
    gap:12px;
    padding-block:14px;
  }
  .masthead__meta{display:none}
  .masthead__cta{display:none}
  .brand{justify-self:center;gap:10px}
  .brand__mark{width:36px;height:36px;font-size:14px}
  .brand__cn{font-size:22px}

  .nav-toggle{
    display:inline-flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:4px;
    justify-self:start;
    width:44px;height:44px;
    border:1px solid var(--line);
    border-radius:var(--radius);
    color:var(--paper);
    cursor:pointer;
    transition:border-color .18s var(--ease),background .18s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--line-volt)}
  .nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
  .nav-toggle__bars span{
    display:block;height:2px;width:100%;
    background:var(--volt);
    transition:transform .2s var(--ease),opacity .2s var(--ease);
  }
  .nav-toggle__label{
    font-family:var(--font-mono);
    font-size:9px;letter-spacing:.1em;color:var(--muted);
  }
  .site-header[data-open] .nav-toggle{border-color:var(--volt);background:rgba(232,255,58,.1)}
  .site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
  .site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

  .site-nav{display:none}
  .site-header[data-open] .site-nav{
    display:block;
    animation:nav-drop .24s var(--ease) both;
  }
  @keyframes nav-drop{
    from{opacity:0;transform:translateY(-6px)}
    to{opacity:1;transform:translateY(0)}
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    padding-block:6px 12px;
  }
  .site-nav__item{display:block}
  .site-nav__link{
    display:block;
    padding:14px 12px;
    font-size:17px;
    border-left:3px solid transparent;
    border-bottom:1px solid var(--line-soft);
  }
  .site-nav__link::before{display:none}
  .site-nav__link[aria-current="page"]{
    clip-path:none;
    border-left-color:var(--lime);
    background:rgba(232,255,58,.14);
    color:var(--volt);
  }
  .site-nav__link[aria-current="page"]:hover{background:rgba(232,255,58,.2);color:var(--volt)}

  .filter-strip__inner{flex-wrap:wrap;gap:8px;padding-block:9px}
  .filter-strip__label{width:100%}
  .filter-strip__count{width:100%}

  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
}

@media (max-width:640px){
  .header-utility{display:none}
  .filter-chip{font-size:11.5px;padding:6px 12px}
  #main-content{scroll-margin-top:110px}
  .footer-inner{padding-block:32px 20px}
  .contact-row{padding:12px 14px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .btn:hover,.footer-link:hover{transform:none}
  .ticker-dot{animation:none}
}