/* ============================================================
   加拿大指南 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

:root{
  --maple:#C8102E;
  --maple-deep:#8B0A1E;
  --fir:#0B6E4F;
  --fir-deep:#08251C;
  --glacier:#2E7DA6;
  --gold:#D99A2B;
  --aurora:#6C5CE7;
  --paper:#FDFCF8;
  --snow:#FFFFFF;
  --mist:#E9ECEF;
  --ink:#1A1D1F;
  --ink-soft:#4C545B;
  --ink-faint:#7A838B;
  --line:rgba(11,110,79,.18);
  --line-soft:rgba(26,29,31,.10);

  --font-head:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Heiti SC",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Heiti SC",system-ui,sans-serif;
  --font-mono:"SF Mono","Roboto Mono",Consolas,"Courier New",monospace;

  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:12px;
  --radius-pill:999px;

  --shadow-1:0 2px 8px rgba(26,29,31,.06);
  --shadow-2:0 12px 32px rgba(26,29,31,.08);
  --shadow-3:0 20px 48px rgba(26,29,31,.14);

  --container:1200px;
  --gutter:clamp(16px,4vw,32px);
  --rail-h:42px;
  --bar-h:66px;
  --header-h:calc(var(--rail-h) + var(--bar-h));
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 18px);
}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:1rem;
  font-weight:400;
  line-height:1.7;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-head);font-weight:900;line-height:1.15;letter-spacing:-.02em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
hr{border:0}
[hidden]{display:none !important}
:focus-visible{outline:3px solid var(--glacier);outline-offset:3px;border-radius:6px}

/* ---------- 布局基元 ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,80px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px 28px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section-title{font-size:clamp(1.6rem,3vw,2.2rem);letter-spacing:-.025em}
.section-head .lead{margin:0;max-width:64ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.75rem;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--fir);
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--maple)}
.display{font-size:clamp(2.4rem,5vw,4.2rem);line-height:1.04;letter-spacing:-.035em;font-weight:900}
.lead{font-size:clamp(1rem,1.3vw,1.125rem);line-height:1.75;color:var(--ink-soft)}
.muted{color:var(--ink-faint)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.divider{height:1px;border:0;background:var(--line);margin-block:clamp(24px,4vw,44px)}

.prose{max-width:72ch;font-size:1.0625rem;line-height:1.8;color:var(--ink-soft)}
.prose h2{font-size:1.4rem;color:var(--ink);margin:1.6em 0 .6em}
.prose h3{font-size:1.15rem;color:var(--ink);margin:1.4em 0 .5em}
.prose ul{list-style:disc;padding-left:1.35em;margin:0 0 1.1em}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--ink);font-weight:700}
.prose a{color:var(--glacier);border-bottom:1px solid currentColor}

.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* Bento 信息板 */
.bento{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:clamp(14px,2vw,22px)}
.bento-cell{
  grid-column:span 2;
  background:var(--snow);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:var(--shadow-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.bento-cell:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--line)}
.bento-cell--half{grid-column:span 3}
.bento-cell--wide{grid-column:span 4}
.bento-cell--full{grid-column:1/-1}
.bento-cell--tall{grid-row:span 2}

/* 面板 / 卡片 / 旁注 */
.panel{
  background:var(--snow);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:var(--shadow-1);
}
.card{
  position:relative;
  background:var(--snow);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-md);
  padding:clamp(16px,2vw,22px);
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.note{
  border-left:3px solid var(--gold);
  background:rgba(217,154,43,.09);
  padding:14px 18px;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.9375rem;
  color:var(--ink-soft);
}

/* 标签与印章 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:.25em .72em;border-radius:var(--radius-pill);
  font-size:.75rem;font-weight:700;line-height:1.5;
  background:var(--mist);color:var(--ink-soft);
}
.tag--maple{background:rgba(200,16,46,.10);color:var(--maple-deep)}
.tag--fir{background:rgba(11,110,79,.12);color:var(--fir)}
.tag--glacier{background:rgba(46,125,166,.14);color:#1E5B7B}
.tag--gold{background:rgba(217,154,43,.20);color:#7A5407}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:.25em .72em;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--snow);
  font-size:.75rem;font-weight:700;color:var(--ink-soft);
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:.72em 1.4em;border-radius:var(--radius-pill);
  font-size:.9375rem;font-weight:700;line-height:1.2;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),
             border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--maple);color:#fff;box-shadow:0 8px 20px rgba(200,16,46,.24)}
.btn-primary:hover{background:var(--maple-deep)}
.btn-fir{background:var(--fir);color:#fff;box-shadow:0 8px 20px rgba(11,110,79,.22)}
.btn-fir:hover{background:#095B41}
.btn-ghost{background:var(--snow);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--fir);color:var(--fir)}
.btn-quiet{background:var(--mist);color:var(--ink)}
.btn-quiet:hover{background:#DEE3E8}

/* 筛选条（仅筛选当前页内容） */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  width:max-content;max-width:100%;
  padding:6px;border:1px solid var(--line);border-radius:var(--radius-pill);
  background:var(--snow);box-shadow:var(--shadow-1);
}
.filter-btn{
  padding:.42em 1em;border-radius:var(--radius-pill);
  font-size:.875rem;font-weight:700;color:var(--ink-soft);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.filter-btn:hover{background:var(--mist);color:var(--fir)}
.filter-btn[aria-pressed="true"]{background:var(--glacier);color:#fff}
.filter-status{
  padding-inline:10px 14px;
  font-family:var(--font-mono);font-size:.75rem;color:var(--ink-faint);
}
[data-filtered-out]{display:none !important}

/* 统计数字 */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:18px}
.stat{padding:14px 0 14px 16px;border-left:2px solid var(--mist)}
.stat-value{display:block;font-family:var(--font-mono);font-size:clamp(1.4rem,2.4vw,1.8rem);font-weight:700;color:var(--maple);line-height:1.2}
.stat-label{display:block;font-size:.8125rem;color:var(--ink-faint)}

/* 面包屑 */
.breadcrumbs{padding-block:14px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8125rem;color:var(--ink-faint)}
.crumb{color:var(--ink-soft)}
.crumb a:hover{color:var(--maple)}
.crumb[aria-current="page"]{color:var(--ink);font-weight:700}
.crumb:not(:first-child)::before{content:"/";margin-inline-end:8px;color:var(--ink-faint);opacity:.55}

/* 图片容器 */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  border-radius:var(--radius-md);
  background:linear-gradient(145deg,var(--fir),var(--glacier));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(26,29,31,0) 42%,rgba(26,29,31,.46) 100%);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--band{aspect-ratio:21/9}
.media-frame--soft::after{display:none}

/* 显现 */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
[data-reveal="in"]{opacity:1;transform:none}

/* ---------- 页头 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:.6em 1.1em;border-radius:var(--radius-pill);
  background:var(--ink);color:var(--snow);
  font-size:.875rem;font-weight:700;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:none}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  --hdr-fg:#FFFFFF;
  --hdr-mute:rgba(255,255,255,.76);
  --hdr-line:rgba(255,255,255,.22);
  --hdr-chip:rgba(255,255,255,.12);
  --hdr-chip-line:rgba(255,255,255,.34);
  color:var(--hdr-fg);
  background:linear-gradient(180deg,rgba(10,26,23,.74) 0%,rgba(10,26,23,.44) 54%,rgba(10,26,23,0) 100%);
  transition:background-color .28s var(--ease),color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header[data-scrolled],
.site-header[data-nav-open]{
  --hdr-fg:var(--ink);
  --hdr-mute:var(--ink-soft);
  --hdr-line:var(--line);
  --hdr-chip:var(--mist);
  --hdr-chip-line:var(--line);
  background:rgba(253,252,248,.96);
  box-shadow:0 1px 0 var(--line),0 10px 30px rgba(26,29,31,.07);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  backdrop-filter:saturate(140%) blur(10px);
}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--maple) 0%,var(--gold) 42%,var(--glacier) 72%,var(--fir) 100%);
  pointer-events:none;
}

/* 顶部快捷定位栏 */
.header-rail{border-bottom:1px solid var(--hdr-line);transition:border-color .28s var(--ease)}
.rail-inner{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:clamp(10px,1.6vw,20px);
  min-height:var(--rail-h);padding-block:6px;
}
.rail-lead{
  margin:0;flex:none;
  font-size:.75rem;font-weight:700;letter-spacing:.1em;
  color:var(--hdr-mute);
}
.quick-jumps{display:flex;flex-wrap:wrap;gap:8px;margin-inline-end:auto}
.quick-jump{
  padding:.28em .85em;border-radius:var(--radius-pill);
  border:1px solid var(--hdr-chip-line);
  background:var(--hdr-chip);
  color:var(--hdr-fg);
  font-size:.8125rem;font-weight:600;line-height:1.5;white-space:nowrap;
  transition:transform .2s var(--ease),background-color .2s var(--ease),
             border-color .2s var(--ease),color .2s var(--ease);
}
.quick-jump:hover{transform:translateY(-1px);border-color:var(--maple);color:var(--maple)}
.site-header:not([data-scrolled]):not([data-nav-open]) .quick-jump:hover{
  background:rgba(200,16,46,.88);border-color:transparent;color:#fff;
}
.quick-jump[data-active]{background:var(--maple);border-color:transparent;color:#fff}

.rail-status{display:flex;align-items:center;gap:12px;margin-inline-start:auto;flex:none}
.version-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:.24em .72em;border-radius:var(--radius-pill);
  background:var(--gold);color:#2A1B05;
  font-family:var(--font-mono);font-size:.75rem;font-weight:700;letter-spacing:.02em;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.version-chip::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.7}
.version-chip:hover{background:#C68A1F}
.version-chip[data-copied]{background:var(--fir);color:#fff}
.rail-link{
  font-size:.8125rem;font-weight:700;color:var(--hdr-fg);
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.rail-link:hover{color:var(--maple);border-color:var(--maple)}

/* 品牌正文栏 */
.header-bar{position:relative;z-index:2}
.bar-inner{
  display:flex;align-items:center;
  gap:clamp(12px,2.4vw,28px);
  min-height:var(--bar-h);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  position:relative;flex:none;width:34px;height:34px;border-radius:11px;
  background:conic-gradient(from 200deg,var(--maple) 0%,var(--gold) 40%,var(--fir) 76%,var(--maple) 100%);
  box-shadow:0 2px 8px rgba(26,29,31,.22);
}
.brand-mark::after{
  content:"";position:absolute;inset:8px;background:var(--paper);
  clip-path:polygon(50% 0%,62% 30%,100% 20%,72% 50%,100% 76%,60% 70%,50% 100%,40% 70%,0% 76%,28% 50%,0% 20%,38% 30%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-name{font-family:var(--font-head);font-weight:900;font-size:1.125rem;letter-spacing:.01em}
.brand-tag{font-size:.6875rem;font-weight:600;letter-spacing:.1em;color:var(--hdr-mute)}

/* 导航 */
.site-nav{display:flex;align-items:center;margin-inline-start:auto}
.nav-list{display:flex;align-items:center;gap:clamp(2px,1vw,12px)}
.nav-link{
  position:relative;display:inline-block;
  padding:.5em .7em;border-radius:10px;
  font-size:.9375rem;font-weight:600;color:var(--hdr-fg);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:.7em;right:.7em;bottom:.3em;height:2px;
  border-radius:2px;background:var(--maple);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .24s var(--ease);
}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--maple)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.site-header:not([data-scrolled]):not([data-nav-open]) .nav-link[aria-current="page"]{color:#fff}
.site-header:not([data-scrolled]):not([data-nav-open]) .nav-link[aria-current="page"]::after{background:var(--snow)}

.drawer-extras{display:none}

/* 移动端按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;margin-inline-start:auto;
  padding:.5em .9em;border-radius:var(--radius-pill);
  border:1px solid var(--hdr-chip-line);
  color:var(--hdr-fg);font-size:.875rem;font-weight:700;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--maple);color:var(--maple)}
.nav-toggle-bars{position:relative;width:18px;height:2px;border-radius:2px;background:currentColor}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:currentColor;
  transition:transform .24s var(--ease),opacity .2s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-label{line-height:1}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,110px);
  color:rgba(255,255,255,.86);
  border-top:1px solid rgba(255,255,255,.12);
  background:
    radial-gradient(120% 90% at 10% 0%,rgba(108,92,231,.30) 0%,rgba(108,92,231,0) 56%),
    radial-gradient(95% 85% at 90% 8%,rgba(46,125,166,.30) 0%,rgba(46,125,166,0) 62%),
    linear-gradient(180deg,#0A2B21 0%,#081C17 58%,#061310 100%);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:
    repeating-linear-gradient(112deg,rgba(255,255,255,.055) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(-64deg,rgba(255,255,255,.045) 0 1px,transparent 1px 62px);
}
.footer-inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--container);
  margin-inline:auto;
  padding:clamp(48px,7vw,80px) var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.15fr 1fr 1fr;
  gap:clamp(28px,4vw,56px);
}
.footer-brandline{
  margin:0 0 10px;
  font-family:var(--font-head);font-weight:900;font-size:1.125rem;
  color:#fff;letter-spacing:-.01em;
}
.footer-lede{margin:0 0 22px;max-width:36ch;font-size:.9375rem;color:rgba(255,255,255,.7)}
.contact-list{display:grid;gap:10px}
.contact-item{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.875rem}
.contact-label{
  flex:none;min-width:4.6em;
  font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--gold);
}
.contact-value{font-family:var(--font-mono);color:rgba(255,255,255,.9);word-break:break-all}
.copy-btn{
  padding:.18em .72em;border-radius:var(--radius-pill);
  border:1px solid rgba(255,255,255,.3);
  font-size:.75rem;font-weight:700;color:rgba(255,255,255,.86);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.copy-btn:hover{border-color:var(--gold);color:var(--gold)}
.copy-btn[data-copied]{background:var(--maple);border-color:transparent;color:#fff}

.footer-groups{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,32px)}
.footer-group-title{
  margin:0 0 14px;
  font-family:var(--font-body);
  font-size:.75rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);
}
.footer-links{display:grid;gap:9px}
.footer-link{
  display:inline-block;font-size:.9375rem;color:rgba(255,255,255,.78);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:#fff;border-color:var(--maple)}

.timeline{position:relative;padding-left:20px}
.timeline::before{
  content:"";position:absolute;left:5px;top:10px;bottom:10px;width:1px;
  background:linear-gradient(180deg,var(--maple) 0%,rgba(255,255,255,.18) 100%);
}
.timeline-item{position:relative}
.timeline-node{
  display:flex;align-items:center;gap:10px;width:100%;
  padding:.45em 0;text-align:left;color:rgba(255,255,255,.88);
  transition:color .2s var(--ease);
}
.timeline-node:hover{color:#fff}
.node-dot{
  position:absolute;left:-20px;top:50%;width:11px;height:11px;margin-top:-5.5px;
  border-radius:50%;background:rgba(255,255,255,.34);
  box-shadow:0 0 0 3px rgba(255,255,255,.08);
  transition:background-color .22s var(--ease),box-shadow .22s var(--ease);
}
.timeline-node[aria-expanded="true"] .node-dot{background:var(--maple);box-shadow:0 0 0 4px rgba(200,16,46,.3)}
.node-label{font-family:var(--font-mono);font-size:.9375rem;font-weight:700;color:#fff}
.node-hint{margin-inline-start:auto;padding-left:10px;font-size:.75rem;color:rgba(255,255,255,.58)}
.timeline-body{padding:2px 0 14px;font-size:.875rem;line-height:1.7;color:rgba(255,255,255,.72)}
.timeline-summary{margin:0}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 28px;
  margin-top:clamp(32px,5vw,56px);padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:.8125rem;color:rgba(255,255,255,.62);
}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px}
.legal-link{
  color:rgba(255,255,255,.78);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.legal-link:hover{color:#fff;border-color:var(--gold)}
.footer-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px}
.icp{font-family:var(--font-mono);letter-spacing:.02em}
.copyright{margin:0}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-timeline{grid-column:1/-1}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bento-cell{grid-column:span 3}
  .bento-cell--wide{grid-column:span 6}
}
@media (max-width:960px){
  :root{--rail-h:0px;--bar-h:62px}
  .header-rail{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;inset:0;z-index:1;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:4px;margin:0;
    padding:calc(var(--bar-h) + 26px) var(--gutter) 40px;
    background:var(--paper);color:var(--ink);
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    display:block;font-size:1.25rem;font-weight:800;
    padding:.72em .15em;border-radius:0;color:var(--ink);
    border-bottom:1px solid var(--line-soft);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"],
  .site-header:not([data-scrolled]):not([data-nav-open]) .nav-link[aria-current="page"]{color:var(--maple)}
  .drawer-extras{display:block;margin-top:26px;padding-top:20px;border-top:1px dashed var(--line)}
  .drawer-title{
    margin:0 0 10px;
    font-family:var(--font-mono);font-size:.75rem;font-weight:700;
    letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint);
  }
  .drawer-extras .quick-jumps{margin:0}
  .drawer-extras .quick-jump{color:var(--ink);border-color:var(--line);background:var(--snow)}
  .drawer-extras .quick-jump[data-active]{background:var(--maple);border-color:transparent;color:#fff}
  .brand-tag{display:none}
}
@media (max-width:720px){
  .footer-top{grid-template-columns:1fr}
  .footer-groups{grid-template-columns:1fr 1fr}
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
  .bento{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bento-cell,.bento-cell--half,.bento-cell--wide{grid-column:span 2}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .filter-bar{width:100%;border-radius:var(--radius-md)}
}
@media (max-width:420px){
  .footer-groups{grid-template-columns:1fr}
  .version-chip{display:none}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal],[data-reveal="in"]{opacity:1 !important;transform:none !important}
  .btn:hover,.card:hover,.bento-cell:hover,.quick-jump:hover{transform:none}
}