/* ============================================================
   OP7 Site Kit — /assets/site.css
   共享层：重置、变量、中文排版、页头、页脚、通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,dl,dd,figure,figcaption,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
[hidden]{display:none!important}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#081826;
  --panel:#122C42;
  --panel-hi:#17364E;
  --paper:#F4EBDD;
  --warm:#FFF8EC;
  --brown:#241A14;
  --cyan:#33E0D0;
  --orange:#FF6B3D;
  --steel:#8FA6B8;
  --line:#2B4A63;
  --teal:#1D8F82;
  --ink-deep:#040C14;

  --bg:var(--ink);
  --fg:var(--warm);
  --fg-soft:var(--steel);
  --border:var(--line);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --wrap:1240px;
  --gutter:clamp(20px,4.6vw,88px);
  --shadow-brutal:8px 8px 0 rgba(4,12,20,.55);
  --focus:0 0 0 4px rgba(51,224,208,.22);
  --ease:cubic-bezier(.3,.7,.3,1);
  --radius:2px;
}

/* ---------- 3. 中文排版基线 ---------- */
body{
  min-height:100vh;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-sans);
  font-size:clamp(16px,.55vw + 14.6px,18px);
  line-height:1.8;
  letter-spacing:.02em;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{font-weight:800;line-height:1.22;letter-spacing:-.01em}
p{text-wrap:pretty}
strong{font-weight:700;color:var(--warm)}
code,kbd,samp{font-family:var(--font-mono);font-size:.94em;letter-spacing:.06em}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;box-shadow:var(--focus)}
html.drawer-open{overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. Skip link 与滚动进度 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  padding:10px 16px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  background:var(--orange);color:#1B0B05;border:2px solid var(--ink);
  transition:transform .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);color:#1B0B05}
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:150;
  background:rgba(43,74,99,.4);pointer-events:none;
}
.scroll-progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}

/* ---------- 5. 页头：状态轨 ---------- */
.site-header{
  position:relative;
  background:var(--ink);
  color:var(--warm);
  border-bottom:6px solid var(--line);
}
.header-rail{
  background:rgba(18,44,66,.6);
  border-bottom:1px solid var(--line);
}
.rail-inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:8px var(--gutter);
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
}
.rail-status{
  display:flex;align-items:center;gap:10px;
  color:var(--steel);min-width:0;
}
.pulse-dot{
  width:8px;height:8px;flex:0 0 auto;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(51,224,208,.16);
  animation:pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(51,224,208,.16)}
  50%{opacity:.5;box-shadow:0 0 0 6px rgba(51,224,208,.05)}
}
.rail-meta{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.rail-version{color:var(--cyan);font-size:12px;letter-spacing:.08em;white-space:nowrap}
.drawer-trigger{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 12px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--warm);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  transition:transform .18s var(--ease),border-color .18s,background .18s,color .18s;
}
.drawer-trigger:hover,.drawer-trigger:focus-visible{
  transform:translateY(-2px);
  border-color:var(--cyan);
  background:var(--panel-hi);
  color:var(--cyan);
}
.drawer-trigger-label{white-space:nowrap}
.drawer-trigger-icon{
  width:16px;height:10px;flex:0 0 auto;
  background:
    linear-gradient(var(--orange),var(--orange)) 0 0/100% 2px no-repeat,
    linear-gradient(var(--cyan),var(--cyan)) 0 4px/100% 2px no-repeat,
    linear-gradient(var(--cyan),var(--cyan)) 0 8px/100% 2px no-repeat;
}
.drawer-trigger--footer{padding:6px 10px;font-size:11px}

/* ---------- 6. 页头：居中刊头 ---------- */
.masthead{
  position:relative;
  max-width:var(--wrap);
  margin:0 auto;
  padding:clamp(18px,3.2vw,34px) var(--gutter) clamp(12px,1.8vw,18px);
  display:grid;justify-items:center;gap:10px;
  text-align:center;
}
.masthead::before,
.masthead::after{
  content:"";position:absolute;top:44%;height:2px;
  width:clamp(0px,10vw,150px);
  background:repeating-linear-gradient(90deg,var(--line) 0 10px,transparent 10px 18px);
}
.masthead::before{left:var(--gutter)}
.masthead::after{right:var(--gutter)}
.brand{
  display:grid;justify-items:center;gap:4px;
  transition:color .18s;
}
.brand-mark{
  display:block;
  font-size:clamp(46px,9vw,88px);
  font-weight:800;line-height:.9;letter-spacing:-.035em;
  color:var(--warm);
  transition:color .18s;
}
.brand-mark-accent{color:var(--cyan);transition:color .18s}
.brand:hover .brand-mark{color:var(--warm)}
.brand:hover .brand-mark-accent{color:var(--orange)}
.brand-line{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.34em;
  color:var(--steel);
}
.brand-badge{
  display:inline-block;
  padding:4px 10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--cyan);
  border:1px solid var(--teal);
  background:rgba(29,143,130,.12);
  border-radius:1px;
}

/* ---------- 7. 页头：导航 ---------- */
.nav-bar{
  position:relative;
  border-top:2px solid var(--line);
}
.nav-toggle{display:none}
.nav-toggle-bars{
  display:block;width:22px;height:2px;flex:0 0 auto;
  background:var(--cyan);
  box-shadow:0 6px 0 var(--cyan),0 12px 0 var(--cyan);
  transition:background .18s,box-shadow .18s;
}
.nav-toggle-text{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em}
.nav-toggle[aria-expanded="true"]{border-color:var(--orange);color:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{
  background:var(--orange);
  box-shadow:0 6px 0 var(--orange),0 12px 0 var(--orange);
}
.site-nav{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--gutter);
}
.nav-list{display:flex;justify-content:center;flex-wrap:wrap}
.nav-item{border-left:1px solid rgba(43,74,99,.75)}
.nav-item:first-child{border-left:0}
.nav-item:last-child{border-right:1px solid rgba(43,74,99,.75)}
.nav-link{
  position:relative;
  display:flex;align-items:baseline;gap:8px;
  padding:14px clamp(10px,1.6vw,20px);
  font-size:15px;font-weight:500;color:var(--warm);
  transition:color .18s,background .18s;
}
.nav-num{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.1em;
  color:var(--steel);
  transition:color .18s;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cyan)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--orange)}
.nav-link[aria-current="page"] .nav-num{color:var(--orange)}
.nav-link[aria-current="page"]::after{background:var(--orange);transform:scaleX(1)}

/* ---------- 8. 版本索引抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:180;
  pointer-events:none;visibility:hidden;
  transition:visibility 0s linear .24s;
}
.drawer[data-open]{pointer-events:auto;visibility:visible;transition-delay:0s}
.drawer-backdrop{
  position:absolute;inset:0;
  background:rgba(4,12,20,.72);
  opacity:0;
  transition:opacity .22s var(--ease);
}
.drawer[data-open] .drawer-backdrop{opacity:1}
.drawer-panel{
  position:absolute;top:0;right:0;
  width:min(430px,92vw);height:100%;
  display:flex;flex-direction:column;
  overflow-y:auto;
  background:var(--panel);
  color:var(--warm);
  border-left:2px solid var(--line);
  box-shadow:-14px 0 0 rgba(4,12,20,.45);
  transform:translateX(100%);
  transition:transform .24s var(--ease);
}
.drawer[data-open] .drawer-panel{transform:translateX(0)}
.drawer-head{
  position:relative;
  padding:22px 24px 18px;
  display:grid;gap:6px;
  border-bottom:2px solid var(--line);
  background:linear-gradient(180deg,rgba(51,224,208,.08),transparent);
}
.drawer-kicker{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;
  color:var(--steel);
}
.drawer-title{font-size:24px;font-weight:800;color:var(--warm)}
.drawer-close{
  position:absolute;top:16px;right:16px;
  width:36px;height:36px;
  display:grid;place-items:center;
  border:2px solid var(--line);
  transition:border-color .18s,transform .18s var(--ease);
}
.drawer-close:hover,.drawer-close:focus-visible{border-color:var(--orange);transform:translateY(-2px)}
.drawer-close-mark{position:relative;width:14px;height:14px;display:block}
.drawer-close-mark::before,
.drawer-close-mark::after{
  content:"";position:absolute;top:6px;left:0;
  width:14px;height:2px;background:var(--cyan);
}
.drawer-close-mark::before{transform:rotate(45deg)}
.drawer-close-mark::after{transform:rotate(-45deg)}
.drawer-body{padding:22px 24px 36px;display:grid;gap:22px}
.version-plate{
  display:grid;gap:2px;
  padding:16px 18px;
  background:var(--ink);
  border:2px solid var(--line);
  box-shadow:6px 6px 0 rgba(4,12,20,.55);
}
.version-plate-label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--steel);
}
.version-plate-value{
  font-family:var(--font-mono);
  font-size:44px;line-height:1.05;font-weight:700;letter-spacing:.02em;
  color:var(--cyan);
}
.version-plate-note{font-size:13px;line-height:1.7;color:var(--steel)}
.drawer-list{border-top:1px solid var(--line)}
.drawer-item{border-bottom:1px solid var(--line)}
.drawer-link{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;
  padding:13px 4px;
  transition:color .16s,background .16s,padding-left .16s;
}
.drawer-num{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--orange)}
.drawer-link-text{font-size:15px;font-weight:600}
.drawer-link-meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--steel)}
.drawer-link:hover,.drawer-link:focus-visible{
  color:var(--cyan);background:rgba(51,224,208,.07);padding-left:10px;
}
.meta-list{display:grid;gap:10px}
.meta-row{
  display:grid;grid-template-columns:84px 1fr;gap:10px;
  padding-top:10px;
  border-top:1px dashed rgba(43,74,99,.95);
}
.meta-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--steel)}
.meta-val{font-size:13px;color:var(--warm)}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,120px);
  background:var(--ink);
  color:var(--warm);
  border-top:6px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-6px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(51,224,208,0) 42%,rgba(255,107,61,0) 58%,var(--orange));
}
.footer-inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:clamp(36px,5vw,64px) var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:clamp(28px,5vw,64px);
  align-items:start;
  padding-bottom:clamp(24px,3vw,40px);
  border-bottom:2px solid var(--line);
}
.footer-brand{display:grid;gap:10px;justify-items:start}
.footer-mark{
  font-size:clamp(38px,6vw,64px);
  font-weight:800;line-height:.95;letter-spacing:-.035em;
  color:var(--warm);
}
.footer-tag{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;color:var(--cyan);
}
.footer-summary{max-width:34em;font-size:14px;line-height:1.85;color:var(--steel)}
.footer-badge{
  display:inline-block;margin-top:4px;
  padding:4px 10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--cyan);
  border:1px solid var(--teal);
  background:rgba(29,143,130,.12);
}
.footer-contact{
  display:grid;gap:12px;
  border-left:2px solid var(--line);
  padding-left:clamp(16px,2.4vw,28px);
}
.footer-heading{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;font-weight:600;
  color:var(--steel);
}
.contact-list{display:grid;gap:8px}
.contact-item{
  display:grid;grid-template-columns:76px 1fr;gap:10px;align-items:baseline;
  font-size:14px;line-height:1.7;
}
.contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--orange)}
.contact-val{color:var(--warm);word-break:break-word}
.footer-mid{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:24px;align-items:start;
  padding:clamp(20px,2.6vw,30px) 0;
  border-bottom:1px solid var(--line);
}
.footer-legal{display:grid;gap:2px}
.legal-list{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:10px}
.legal-link{
  font-size:14px;color:var(--warm);
  border-bottom:1px solid var(--line);padding-bottom:2px;
  transition:color .16s,border-color .16s;
}
.legal-link:hover,.legal-link:focus-visible{color:var(--cyan);border-color:var(--cyan)}
.footer-note{
  max-width:28em;justify-self:end;text-align:right;
  font-size:13px;line-height:1.8;color:var(--steel);
}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;
  padding-top:20px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--steel);
}
.footer-icp,.footer-copy{color:var(--steel)}

/* ---------- 10. 通用版式 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-narrow{max-width:760px}
.section{padding-block:clamp(40px,6vw,88px)}
.section-head{display:grid;gap:12px;margin-bottom:clamp(22px,3vw,36px)}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.2em;
  color:var(--cyan);
}
.section-num{
  font-family:var(--font-mono);
  font-size:clamp(28px,4vw,48px);font-weight:700;line-height:1;
  letter-spacing:.06em;color:var(--orange);
}
.lede{font-size:clamp(17px,1.5vw,20px);line-height:1.75;max-width:34em;color:var(--warm)}
.rule{height:2px;border:0;background:repeating-linear-gradient(90deg,var(--line) 0 14px,transparent 14px 26px)}
.paper-zone{background:var(--paper);color:var(--brown)}
.paper-zone .eyebrow{color:var(--teal)}
.paper-zone .lede{color:var(--brown)}
.paper-zone .section-num{color:var(--orange)}
.paper-zone .rule{background:repeating-linear-gradient(90deg,rgba(36,26,20,.35) 0 14px,transparent 14px 26px)}
.paper-zone a{color:var(--brown);border-bottom:1px solid rgba(36,26,20,.4)}
.paper-zone a:hover{color:var(--teal);border-color:var(--teal)}
.prose{
  display:grid;gap:1em;
  max-width:68ch;
  font-size:17px;line-height:1.85;
}
.prose h2{font-size:clamp(24px,2.6vw,32px);margin-top:.6em}
.prose h3{font-size:20px;margin-top:.4em}
.prose ul,.prose ol{display:grid;gap:.55em}
.prose li{position:relative;padding-left:1.15em}
.prose li::before{
  content:"";position:absolute;left:0;top:.85em;
  width:8px;height:2px;background:var(--cyan);
}
.paper-zone .prose li::before{background:var(--teal)}

/* ---------- 11. 网格 ---------- */
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ---------- 12. 面板 / 按钮 / 标签 ---------- */
.panel{
  padding:clamp(18px,2.4vw,28px);
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-brutal);
  color:var(--warm);
}
.paper-zone .panel{background:#FBF4E8;border-color:var(--brown);color:var(--brown);box-shadow:8px 8px 0 rgba(36,26,20,.22)}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;
  font-size:15px;font-weight:600;line-height:1.4;
  border:2px solid transparent;border-radius:var(--radius);
  transition:transform .18s var(--ease),border-color .18s,background .18s,color .18s;
}
.btn:hover,.btn:focus-visible{transform:translateY(-2px)}
.btn-primary{background:var(--orange);color:#1B0B05;border-color:#1B0B05}
.btn-primary:hover,.btn-primary:focus-visible{background:#FF8358;border-color:var(--orange);color:#1B0B05}
.btn-ghost{background:transparent;color:var(--warm);border-color:var(--line)}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.paper-zone .btn-ghost{color:var(--brown);border-color:rgba(36,26,20,.45)}
.paper-zone .btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--steel);
  border:1px solid var(--line);
  background:rgba(18,44,66,.65);
}
.paper-zone .tag{color:var(--brown);border-color:rgba(36,26,20,.3);background:rgba(36,26,20,.05)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 13. 面包屑 ---------- */
.crumbs{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;
  color:var(--steel);
}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb-list>li{display:flex;align-items:center;gap:8px}
.crumb-list>li+li::before{content:"/";color:var(--line)}
.crumb-link{color:var(--warm);border-bottom:1px solid transparent;transition:color .16s,border-color .16s}
.crumb-link:hover,.crumb-link:focus-visible{color:var(--cyan);border-color:var(--cyan)}
.crumb-current{color:var(--cyan)}

/* ---------- 14. 图片容器基础 ---------- */
.figure{
  margin:0;
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-brutal);
  color:var(--warm);
}
.figure-media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background-color:#0B1F30;
  background-image:
    linear-gradient(rgba(43,74,99,.5) 1px,transparent 1px),
    linear-gradient(90deg,rgba(43,74,99,.5) 1px,transparent 1px);
  background-size:36px 36px,36px 36px;
}
.figure-media img{width:100%;height:100%;object-fit:cover}
.figure-media--wide{aspect-ratio:21/9}
.figure-media--tall{aspect-ratio:4/5}
.figure-caption{
  padding:12px 16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--steel);
  border-top:1px solid var(--line);
}

/* ---------- 15. 主题筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-btn{
  padding:8px 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--steel);
  border:2px solid var(--line);
  background:transparent;
  transition:transform .18s var(--ease),border-color .18s,color .18s,background .18s;
}
.filter-btn:hover,.filter-btn:focus-visible{transform:translateY(-2px);border-color:var(--cyan);color:var(--cyan)}
.filter-btn[aria-pressed="true"]{background:var(--orange);border-color:var(--orange);color:#1B0B05}
.filter-count{
  margin-left:auto;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--steel);
}
.filter-item{transition:opacity .16s ease}
.filter-item[data-hidden="true"]{display:none}
.filter-item[data-enter="true"]{animation:filter-in .16s var(--ease) both}
@keyframes filter-in{
  from{opacity:0;transform:translateY(4px)}
  to{opacity:1;transform:none}
}

/* ---------- 16. 响应式 ---------- */
@media (max-width:1100px){
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 6}
}
@media (max-width:900px){
  .masthead::before,.masthead::after{display:none}
  .rail-inner{flex-wrap:wrap;justify-content:center;gap:8px 14px;text-align:center}
  .rail-meta{gap:10px}
  .nav-bar{
    display:flex;flex-direction:column;align-items:center;
    padding:10px var(--gutter) 12px;
  }
  .nav-toggle{
    display:inline-flex;align-items:center;justify-content:center;gap:10px;
    width:max-content;margin:0 auto;padding:10px 18px;
    border:2px solid var(--line);
    background:var(--panel);color:var(--warm);
    transition:border-color .18s,color .18s,background .18s;
  }
  .nav-toggle:hover{background:var(--panel-hi)}
  .site-nav{
    display:none;
    width:100%;max-width:560px;
    padding:0;margin-top:10px;
    border-top:2px solid var(--line);
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch}
  .nav-item{border-left:0;border-right:0;border-bottom:1px solid rgba(43,74,99,.75)}
  .nav-item:last-child{border-right:0;border-bottom:0}
  .nav-link{justify-content:space-between;padding:14px 6px;font-size:16px}
  .nav-link::after{display:none}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:1/-1}
  .footer-top{grid-template-columns:1fr}
  .footer-contact{border-left:0;border-top:2px solid var(--line);padding-left:0;padding-top:18px}
  .footer-mid{grid-template-columns:1fr}
  .footer-note{justify-self:start;text-align:left}
}
@media (max-width:560px){
  .brand-line{letter-spacing:.24em}
  .drawer-panel{width:100%;max-width:100%}
  .drawer-head,.drawer-body{padding-inline:18px}
  .contact-item{grid-template-columns:1fr;gap:2px}
  .footer-base{flex-direction:column;align-items:flex-start}
  .filter-count{margin-left:0;width:100%}
}

/* ---------- 17. Reduced motion ---------- */
@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;
  }
  .drawer-panel{transform:none;display:none}
  .drawer[data-open] .drawer-panel{display:flex}
}