/* ============================================================
   拿大正规平台 · 共享站点样式 /assets/site.css
   目录型内容地图 / 透明叠压导航 / 墨蓝 · 橙红 · 青绿 · 暖沙
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-950:#0B1B2B;
  --ink-800:#15344F;
  --ink-600:#2B5575;
  --orange:#C93B12;
  --orange-bright:#F05A28;
  --teal:#0C7C7C;
  --sand:#F3E7D3;
  --sand-deep:#E4D1B5;
  --slate:#3A4A5C;
  --mist:#B9CBD8;
  --white:#FFFFFF;

  --font-display:'Noto Sans SC','Source Han Sans SC','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-label:'IBM Plex Mono','JetBrains Mono','SFMono-Regular',ui-monospace,monospace;

  --shell:1280px;
  --gutter:clamp(18px,4vw,32px);
  --header-h:76px;
  --radius:4px;
  --shadow-hard:8px 8px 0 var(--ink-950);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
}

@media (max-width:760px){
  :root{--header-h:64px;}
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--sand);
  color:var(--slate);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video,canvas{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;}
table{border-collapse:collapse;width:100%;}
[hidden]{display:none !important;}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--ink-950);
  line-height:1.16;
  letter-spacing:-0.01em;
  text-wrap:balance;
}
h1{
  font-size:clamp(2.4rem,6vw,5.6rem);
  font-weight:900;
  letter-spacing:-0.03em;
}
h2{
  font-size:clamp(1.6rem,3.2vw,2.6rem);
  font-weight:800;
}
h3{
  font-size:clamp(1.12rem,1.8vw,1.4rem);
  font-weight:700;
}
h4{
  font-size:1rem;
  font-weight:700;
  letter-spacing:0.01em;
}
strong,b{font-weight:700;color:var(--ink-950);}
small{font-size:0.84em;}
code,kbd,samp{
  font-family:var(--font-label);
  font-size:0.88em;
  background:var(--sand-deep);
  color:var(--ink-950);
  padding:0.1em 0.36em;
  border-radius:2px;
}

/* ---------- 4. 可访问性 ---------- */
:focus-visible{
  outline:3px solid var(--orange-bright);
  outline-offset:3px;
  border-radius:2px;
}
.visually-hidden{
  position:absolute !important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}
.skip-link{
  position:fixed;
  top:0;left:0;
  z-index:400;
  transform:translateY(-160%);
  background-color:var(--orange);
  color:var(--white);
  font-weight:700;
  font-size:14px;
  letter-spacing:0.04em;
  padding:12px 22px;
  border:2px solid var(--ink-950);
  border-radius:0 0 var(--radius) 0;
  transition:transform var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{
  transform:translateY(0);
}
/* ---------- 5. 布局基础 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
#main-content{
  display:block;
  padding-top:var(--header-h);
  scroll-margin-top:var(--header-h);
}
.u-flush-top{padding-top:0 !important;}

.section{
  padding-block:clamp(44px,6vw,84px);
}
.section--ink{
  background-color:var(--ink-950);
  color:var(--sand);
}
.section--ink h1,
.section--ink h2,
.section--ink h3,
.section--ink strong{color:var(--white);}
.section--sand{
  background-color:var(--sand);
  color:var(--slate);
}
.section--deep{
  background-color:var(--sand-deep);
  color:var(--slate);
}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px 20px;
  margin-bottom:clamp(20px,3vw,34px);
  padding-bottom:14px;
  border-bottom:2px solid var(--ink-950);
}
.section--ink .section__head{border-bottom-color:var(--ink-600);}

.prose{
  max-width:70ch;
  font-size:clamp(15px,1.05vw,17px);
  line-height:1.85;
}
.prose p + p{margin-top:1em;}
.prose ul,
.prose ol{margin-top:1em;padding-left:1.35em;}
.prose ul{list-style:square;}
.prose ol{list-style:decimal;}
.prose li + li{margin-top:0.45em;}
.prose a{
  color:var(--ink-950);
  border-bottom:2px solid var(--orange);
  font-weight:600;
}
.prose a:hover{color:var(--orange);}

/* ---------- 6. 索引与标签 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-label);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--teal);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background-color:currentColor;
  flex:none;
}
.section--ink .eyebrow{color:var(--sand-deep);}

.index-num{
  display:inline-block;
  font-family:var(--font-label);
  font-size:clamp(12px,1.1vw,14px);
  font-weight:600;
  letter-spacing:0.2em;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
}
.section--ink .index-num{color:var(--orange-bright);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-label);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.06em;
  line-height:1.4;
  padding:4px 10px;
  border-radius:2px;
  background-color:var(--teal);
  color:var(--white);
  border:2px solid var(--ink-950);
  white-space:nowrap;
}
.tag--orange{background-color:var(--orange);}
.tag--sand{background-color:var(--sand-deep);color:var(--ink-950);}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  line-height:1;
  letter-spacing:0.02em;
  padding:13px 22px;
  border-radius:var(--radius);
  border:2px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform var(--ease),box-shadow var(--ease),
             background-color var(--ease),color var(--ease),
             border-color var(--ease);
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

.btn--action{
  background-color:var(--orange);
  color:var(--white);
  border-color:var(--ink-950);
  box-shadow:4px 4px 0 rgba(11,27,43,0.55);
}
.btn--action:hover{
  background-color:var(--orange-bright);
  box-shadow:6px 6px 0 rgba(11,27,43,0.55);
}
.btn--ghost{
  background-color:transparent;
  color:var(--white);
  border-color:rgba(255,255,255,0.5);
}
.btn--ghost:hover{
  background-color:rgba(255,255,255,0.12);
  border-color:var(--white);
}
.btn--solid{
  background-color:var(--ink-950);
  color:var(--sand);
  border-color:var(--ink-950);
  box-shadow:4px 4px 0 var(--orange);
}
.btn--solid:hover{box-shadow:6px 6px 0 var(--orange);}
.btn--teal{
  background-color:var(--teal);
  color:var(--white);
  border-color:var(--ink-950);
  box-shadow:4px 4px 0 var(--ink-950);
}
.btn--teal:hover{box-shadow:6px 6px 0 var(--ink-950);}
.btn--quiet{
  background-color:var(--sand-deep);
  color:var(--ink-950);
  border-color:var(--ink-950);
  box-shadow:4px 4px 0 var(--ink-950);
}
.btn--quiet:hover{box-shadow:6px 6px 0 var(--ink-950);}

/* ---------- 8. 头部 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:150;
  background-color:transparent;
  border-bottom:2px solid transparent;
  transition:background-color 200ms ease,border-color 200ms ease,
             box-shadow 200ms ease;
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(180deg,rgba(11,27,43,0.78),rgba(11,27,43,0));
  opacity:1;
  transition:opacity 200ms ease;
  pointer-events:none;
}
.site-header[data-state="solid"],
.site-header[data-open="true"]{
  background-color:var(--ink-950);
  border-bottom-color:var(--ink-600);
  box-shadow:0 12px 28px rgba(11,27,43,0.32);
}
.site-header[data-state="solid"]::before,
.site-header[data-open="true"]::before{opacity:0;}

.header-shell{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,32px);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:none;
  color:var(--white);
  padding:4px 0;
}
.brand__mark{
  position:relative;
  width:36px;
  height:36px;
  flex:none;
  border-radius:3px;
  background-color:var(--orange-bright);
  border:2px solid var(--ink-950);
  box-shadow:3px 3px 0 rgba(11,27,43,0.6);
}
.brand__mark::before{
  content:"";
  position:absolute;
  top:9px;left:7px;
  width:5px;height:5px;
  border-radius:1px;
  background-color:var(--ink-950);
  box-shadow:9px 0 0 var(--ink-950),18px 0 0 var(--ink-950);
}
.brand__mark::after{
  content:"";
  position:absolute;
  left:6px;bottom:9px;
  width:21px;height:2px;
  background-color:var(--ink-950);
}
.brand__text{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
}
.brand__name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  line-height:1.2;
  letter-spacing:0.02em;
  color:var(--white);
  white-space:nowrap;
}
.brand__tagline{
  font-family:var(--font-label);
  font-size:10px;
  font-weight:500;
  letter-spacing:0.14em;
  line-height:1.3;
  color:var(--mist);
  white-space:nowrap;
}

.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  padding:9px 13px;
  border:2px solid rgba(255,255,255,0.42);
  border-radius:var(--radius);
  background-color:transparent;
  color:var(--white);
  font-family:var(--font-label);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.12em;
  cursor:pointer;
  transition:border-color var(--ease),background-color var(--ease);
}
.nav-toggle:hover{
  border-color:var(--orange-bright);
  background-color:rgba(255,255,255,0.08);
}
.nav-toggle__bars{
  display:grid;
  gap:4px;
  width:18px;
  flex:none;
}
.nav-toggle__bar{
  display:block;
  height:2px;
  width:100%;
  background-color:currentColor;
  transition:transform var(--ease),opacity var(--ease);
}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(1){
  transform:translateY(6px) rotate(45deg);
}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(2){
  opacity:0;
}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(3){
  transform:translateY(-6px) rotate(-45deg);
}
.nav-toggle__label{line-height:1;}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,26px);
  margin-left:auto;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  flex-wrap:wrap;
}
.site-nav__item{display:block;}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  font-size:15px;
  font-weight:500;
  line-height:1.4;
  color:rgba(255,255,255,0.84);
  padding:6px 1px;
  border-bottom:2px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.site-nav__link:hover{
  color:var(--white);
  border-bottom-color:var(--orange-bright);
}
.site-nav__link[aria-current="page"]{
  color:var(--white);
  font-weight:700;
  border-bottom-color:var(--orange-bright);
}
.site-nav__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}
.site-nav__actions .btn{
  padding:10px 16px;
  font-size:13px;
}

.header-progress{
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:3px;
  background-color:transparent;
  pointer-events:none;
  overflow:hidden;
}
.header-progress__bar{
  display:block;
  height:100%;
  width:0;
  background-image:linear-gradient(90deg,var(--teal),var(--orange-bright));
  transition:width 90ms linear;
}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  background-color:var(--ink-950);
  color:var(--sand);
  border-top:6px solid var(--orange);
  padding-top:clamp(40px,5.5vw,68px);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(90deg,rgba(185,203,216,0.07) 1px,transparent 1px);
  background-size:80px 100%;
  pointer-events:none;
}
.footer-shell{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(26px,3.4vw,44px);
  align-items:start;
}

.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(20px,2vw,24px);
  font-weight:900;
  line-height:1.2;
  letter-spacing:-0.01em;
  color:var(--white);
}
.footer-brand__name::after{
  content:"";
  display:block;
  width:46px;height:4px;
  margin-top:14px;
  background-color:var(--orange-bright);
}
.footer-brand__desc{
  margin-top:16px;
  max-width:34ch;
  font-size:14px;
  line-height:1.8;
  color:rgba(243,231,211,0.82);
}
.footer-brand__meta{
  margin-top:16px;
  font-family:var(--font-label);
  font-size:11px;
  letter-spacing:0.08em;
  line-height:1.7;
  color:var(--mist);
}

.footer-col__title{
  position:relative;
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-label);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.18em;
  line-height:1.4;
  text-transform:uppercase;
  color:var(--sand-deep);
  margin:0 0 16px;
}
.footer-col__title::before{
  content:"";
  width:7px;height:7px;
  flex:none;
  background-color:var(--teal);
  border:2px solid var(--ink-600);
}
.footer-col__list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-col__link{
  display:inline-block;
  font-size:15px;
  line-height:1.5;
  color:rgba(243,231,211,0.82);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color var(--ease),border-color var(--ease);
}
.footer-col__link:hover{
  color:var(--white);
  border-bottom-color:var(--orange-bright);
}

.footer-contact__list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-contact__row{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:10px;
  align-items:baseline;
  font-size:14px;
  line-height:1.65;
}
.footer-contact__key{
  font-family:var(--font-label);
  font-size:11px;
  letter-spacing:0.1em;
  color:var(--mist);
}
.footer-contact__value{
  color:rgba(243,231,211,0.92);
  word-break:break-word;
  user-select:all;
}
.footer-contact__note{
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed rgba(185,203,216,0.32);
  font-size:12.5px;
  line-height:1.75;
  color:var(--mist);
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 26px;
  margin-top:clamp(30px,4vw,48px);
  padding-block:22px 30px;
  border-top:1px solid rgba(185,203,216,0.24);
  font-family:var(--font-label);
  font-size:12px;
  letter-spacing:0.05em;
  line-height:1.6;
  color:var(--mist);
}
.footer-legal__copy{margin:0;}
.footer-legal__links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
}
.footer-legal__links a{
  color:rgba(243,231,211,0.82);
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-legal__links a:hover{
  color:var(--white);
  border-bottom-color:var(--orange-bright);
}
.footer-top{
  margin-left:auto;
  padding:8px 14px;
  font-family:var(--font-label);
  font-size:11px;
  letter-spacing:0.12em;
  color:var(--sand);
  background-color:transparent;
  border:2px solid rgba(185,203,216,0.42);
  border-radius:var(--radius);
  cursor:pointer;
  transition:border-color var(--ease),background-color var(--ease),transform var(--ease);
}
.footer-top:hover{
  border-color:var(--orange-bright);
  background-color:rgba(240,90,40,0.16);
  transform:translateY(-2px);
}
[data-year]:empty::before{content:"—";}

/* ---------- 10. 面包屑 ---------- */
.breadcrumb{padding-block:16px 4px;}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-label);
  font-size:12px;
  letter-spacing:0.05em;
  color:var(--slate);
}
.breadcrumb__list li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb__list li + li::before{
  content:"/";
  color:var(--ink-600);
  font-weight:600;
}
.breadcrumb__list a{
  color:var(--ink-800);
  border-bottom:2px solid var(--sand-deep);
  transition:border-color var(--ease),color var(--ease);
}
.breadcrumb__list a:hover{
  color:var(--orange);
  border-bottom-color:var(--orange);
}
.breadcrumb__list [aria-current="page"]{
  color:var(--ink-950);
  font-weight:600;
}

/* ---------- 11. 网格 ---------- */
.grid{
  display:grid;
  gap:var(--gutter);
}
.grid--12{
  grid-template-columns:repeat(12,minmax(0,1fr));
}
.grid--auto{
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}

/* ---------- 12. 卡片 ---------- */
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(18px,2.2vw,26px);
  background-color:var(--white);
  color:var(--slate);
  border:2px solid var(--ink-950);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
  transition:transform var(--ease),box-shadow var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:12px 12px 0 var(--ink-950);
}
.card h3,
.card h2{color:var(--ink-950);}
.card--sand{background-color:var(--sand);}
.card--ink{
  background-color:var(--ink-800);
  color:var(--sand);
  border-color:var(--ink-950);
  box-shadow:8px 8px 0 var(--orange);
}
.card--ink:hover{box-shadow:12px 12px 0 var(--orange);}
.card--ink h2,
.card--ink h3{color:var(--white);}

/* ---------- 13. 索引轴 ---------- */
.index-axis{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.axis-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  font-family:var(--font-label);
  font-size:12px;
  font-weight:500;
  letter-spacing:0.08em;
  line-height:1.5;
  color:var(--slate);
  border-left:2px solid var(--sand-deep);
  transition:color var(--ease),border-color var(--ease),
             background-color var(--ease),padding-left var(--ease);
}
.axis-link:hover{
  color:var(--ink-950);
  border-left-color:var(--ink-950);
  background-color:rgba(228,209,181,0.5);
}
.axis-link.is-current{
  color:var(--ink-950);
  font-weight:600;
  border-left-color:var(--orange);
  background-color:var(--sand-deep);
}

/* ---------- 14. 主题筛选 ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:0 0 clamp(20px,3vw,30px);
  padding:0;
}
.filter-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-label);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.08em;
  line-height:1.4;
  padding:9px 15px;
  color:var(--ink-950);
  background-color:transparent;
  border:2px solid var(--ink-950);
  border-radius:2px;
  cursor:pointer;
  transition:background-color var(--ease),color var(--ease),
             transform var(--ease),box-shadow var(--ease);
}
.filter-btn:hover{
  transform:translateY(-2px);
  background-color:var(--sand-deep);
}
.filter-btn.is-active{
  background-color:var(--orange);
  color:var(--white);
  box-shadow:4px 4px 0 var(--ink-950);
}
.section--ink .filter-btn{
  color:var(--sand);
  border-color:var(--mist);
}
.section--ink .filter-btn:hover{background-color:var(--ink-800);}
.section--ink .filter-btn.is-active{
  background-color:var(--orange);
  color:var(--white);
  border-color:var(--orange);
  box-shadow:4px 4px 0 var(--orange-bright);
}
[data-filter-item][hidden]{display:none !important;}

/* ---------- 15. 图片容器基础 ---------- */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 10;
  background-color:var(--sand-deep);
  border:2px solid var(--ink-950);
  border-radius:var(--radius);
}
.media > img,
.media > svg,
.media > picture{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:21 / 9;}
.media--square{aspect-ratio:1 / 1;}
.media--tall{aspect-ratio:3 / 4;}
.media__overlay{
  position:absolute;
  inset:auto 0 0 0;
  padding:14px 16px;
  font-family:var(--font-label);
  font-size:12px;
  letter-spacing:0.06em;
  line-height:1.5;
  color:var(--white);
  background-image:linear-gradient(180deg,rgba(11,27,43,0),rgba(11,27,43,0.86));
}

/* ---------- 16. 平板 ---------- */
@media (max-width:1024px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
    row-gap:clamp(28px,4vw,40px);
  }
  .footer-brand{grid-column:1 / -1;}
  .footer-brand__desc{max-width:52ch;}
}

/* ---------- 17. 移动导航 ---------- */
@media (max-width:960px){
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:18px var(--gutter) 30px;
    background-color:var(--ink-950);
    border-top:2px solid var(--ink-600);
    border-bottom:2px solid var(--orange);
    max-height:calc(100vh - var(--header-h));
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    overscroll-behavior:contain;
  }
  .site-header[data-open="true"] .site-nav{display:flex;}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
  }
  .site-nav__item{
    border-bottom:1px solid rgba(185,203,216,0.18);
  }
  .site-nav__link{
    display:block;
    width:100%;
    padding:15px 2px;
    font-size:17px;
    font-weight:500;
    color:rgba(255,255,255,0.88);
    border-bottom:0 solid transparent;
  }
  .site-nav__link:hover{color:var(--white);}
  .site-nav__link[aria-current="page"]{
    color:var(--orange-bright);
    border-bottom-color:transparent;
    padding-left:12px;
    border-left:3px solid var(--orange);
  }
  .site-nav__actions{
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    width:100%;
    margin-top:22px;
  }
  .site-nav__actions .btn{
    width:100%;
    padding:14px 18px;
    font-size:14px;
  }
}

/* ---------- 18. 手机 ---------- */
@media (max-width:760px){
  body{font-size:15.5px;}
  .brand__mark{width:32px;height:32px;}
  .brand__mark::before{top:8px;left:6px;box-shadow:8px 0 0 var(--ink-950),16px 0 0 var(--ink-950);}
  .brand__mark::after{width:18px;bottom:8px;left:5px;}
  .brand__name{font-size:15px;}
  .brand__tagline{font-size:9px;letter-spacing:0.1em;}
  .nav-toggle__label{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:14px;}
  .footer-top{margin-left:0;}
  .section__head{flex-direction:column;align-items:flex-start;gap:8px;}
  .breadcrumb__list{font-size:11px;}
}

/* ---------- 19. 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:0.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,
  .card:hover,
  .filter-btn:hover,
  .footer-top:hover{transform:none;}
}