/* =========================================================
   旭博综合站 · /assets/site.css
   共享层：变量 / 重置 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 01 设计变量 ---------- */
:root{
  --orange:#F26A2E;
  --orange-deep:#C9501A;
  --indigo:#182A4A;
  --indigo-soft:#DCE6F2;
  --sand:#F3E7D3;
  --cream:#FFF9F0;
  --rock:#5B6470;
  --teal:#009E73;
  --teal-deep:#006D4F;
  --amber:#FFB347;
  --ink:#0D1726;
  --clay:#C2412D;

  --line:rgba(24,42,74,.18);
  --line-strong:rgba(24,42,74,.40);
  --on-dark:rgba(255,249,240,.74);
  --on-dark-soft:rgba(255,249,240,.52);

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

  --shell:1240px;
  --pad:clamp(16px,3.4vw,40px);
  --ease:cubic-bezier(.22,.7,.3,1);
  --paper-shadow:0 1px 0 rgba(255,255,255,.7) inset,0 20px 34px -30px rgba(13,23,38,.8);
  --stack-shadow:6px 6px 0 -1px rgba(24,42,74,.12),0 20px 34px -30px rgba(13,23,38,.8);
}

/* ---------- 02 重置与中文排版 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  color:var(--indigo);
  background-color:var(--sand);
  background-image:
    radial-gradient(120% 62% at 84% -10%,rgba(242,106,46,.18),transparent 60%),
    linear-gradient(180deg,#F8EFE0 0%,var(--sand) 46%,#EBDCC3 100%);
  background-repeat:no-repeat;
}
img,svg{display:block;max-width:100%;}
img{height:auto;}
h1,h2,h3,h4,h5{margin:0 0 .55em;font-weight:800;line-height:1.22;letter-spacing:-.015em;color:var(--indigo);}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem);line-height:1.1;letter-spacing:-.03em;}
h2{font-size:clamp(1.5rem,2.6vw,2rem);}
h3{font-size:1.15rem;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.25em;}
a{color:var(--orange-deep);}
strong{font-weight:800;}
::selection{background:rgba(242,106,46,.26);color:var(--ink);}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:3px solid var(--orange);
  outline-offset:3px;
  border-radius:2px;
}
.mono{font-family:var(--font-mono);font-size:.84em;letter-spacing:.1em;}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ---------- 03 容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.shell--narrow{max-width:860px;}

/* ---------- 04 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:var(--pad);
  top:-72px;
  z-index:120;
  padding:10px 18px;
  background:var(--ink);
  color:var(--cream);
  border:2px solid var(--amber);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:10px;}

/* ---------- 05 头部：双层信息结构 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  isolation:isolate;
}
.header-top{
  background:linear-gradient(102deg,var(--ink) 0%,#152A4C 46%,var(--indigo) 100%);
  border-bottom:1px solid rgba(255,249,240,.14);
  color:var(--cream);
}
.header-top__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2.2vw,30px);
  min-height:70px;
  padding-block:10px;
  transition:min-height .26s var(--ease);
}
.site-header[data-scrolled] .header-top__inner{min-height:58px;}
.site-header[data-scrolled] .header-top{
  box-shadow:0 16px 28px -26px rgba(13,23,38,.9);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--cream);
  flex:none;
}
.brand__mark{
  position:relative;
  width:36px;
  height:36px;
  flex:none;
  border-radius:50%;
  background:linear-gradient(180deg,var(--orange) 0 54%,var(--amber) 54% 100%);
  box-shadow:inset 0 0 0 2px rgba(13,23,38,.28);
}
.brand__mark::after{
  content:"";
  position:absolute;
  left:-3px;
  right:-3px;
  bottom:11px;
  height:3px;
  background:var(--ink);
  box-shadow:0 0 0 1px rgba(255,249,240,.34);
}
.brand__text{display:flex;flex-direction:column;line-height:1.16;}
.brand__title{
  font-size:19px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--cream);
}
.brand__line{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.42em;
  color:var(--amber);
}

/* 头部说明 */
.header-note{
  margin:0;
  max-width:32ch;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.62;
  letter-spacing:.03em;
  color:var(--on-dark-soft);
}

/* 头部右侧动作 */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}
.header-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  padding:6px 11px;
  border:1px solid rgba(255,249,240,.26);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--on-dark);
  white-space:nowrap;
}
.header-status__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(0,158,115,.24);
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border:2px solid transparent;
  border-radius:2px;
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  background:none;
  color:inherit;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--primary{
  background:var(--orange);
  border-color:var(--orange);
  color:#12203A;
}
.btn--primary:hover{background:var(--amber);border-color:var(--amber);transform:translateY(-1px);}
.btn--ghost{
  background:transparent;
  border-color:currentColor;
  color:inherit;
}
.btn--ghost:hover{background:rgba(255,249,240,.12);}
.btn--sm{min-height:38px;padding:0 14px;font-size:14px;}
.btn--block{width:100%;}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  min-height:40px;
  padding:0 12px;
  border:1px solid rgba(255,249,240,.42);
  border-radius:2px;
  background:transparent;
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(255,249,240,.12);border-color:var(--amber);}
.nav-toggle__icon{
  position:relative;
  display:block;
  width:18px;
  height:12px;
  flex:none;
}
.nav-toggle__icon::before,
.nav-toggle__icon::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:currentColor;
  transition:transform .24s var(--ease),top .24s var(--ease),bottom .24s var(--ease);
}
.nav-toggle__icon::before{top:0;}
.nav-toggle__icon::after{bottom:0;}
.site-header[data-open] .nav-toggle__icon::before{top:5px;transform:rotate(45deg);}
.site-header[data-open] .nav-toggle__icon::after{bottom:5px;transform:rotate(-45deg);}
.nav-toggle__label{white-space:nowrap;}

/* 导航路径条 */
.header-nav{
  position:relative;
  background:var(--cream);
  border-bottom:2px solid var(--indigo);
}
.header-nav__inner{
  display:flex;
  align-items:stretch;
  justify-content:space-between;
  gap:20px;
}
.site-nav{min-width:0;}
.nav-list{
  display:flex;
  align-items:stretch;
  gap:0;
  margin:0;
  padding:0;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-list::-webkit-scrollbar{display:none;}
.nav-list__item{display:flex;flex:none;}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px clamp(9px,1.3vw,18px);
  border-bottom:3px solid transparent;
  color:var(--indigo);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.nav-link__index{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--orange);
  transition:color .16s var(--ease);
}
.nav-link__label{display:inline-block;}
.nav-link:hover{background:var(--indigo-soft);}
.nav-link:hover .nav-link__index{color:var(--orange-deep);}
.nav-link:focus-visible{outline-offset:-4px;}
.nav-link[aria-current="page"]{
  background:var(--indigo);
  color:var(--cream);
  border-bottom-color:var(--orange);
}
.nav-link[aria-current="page"] .nav-link__index{color:var(--amber);}

/* 路径读数 */
.header-readout{
  display:flex;
  align-items:center;
  margin:0;
  padding-left:14px;
  border-left:2px solid var(--orange);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--rock);
}
.header-readout__text{
  display:block;
  max-width:26ch;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* 滚动光带 */
.header-beam{
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:3px;
  background:rgba(24,42,74,.16);
  overflow:hidden;
  pointer-events:none;
}
.header-beam__fill{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--orange),var(--amber));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ---------- 06 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,7vw,96px);
  padding-block:clamp(38px,5.4vw,64px) 0;
  background:var(--ink);
  color:var(--cream);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:5px;
  background:linear-gradient(90deg,var(--orange) 0%,var(--amber) 46%,var(--teal) 100%);
}
.footer-shell{position:relative;z-index:1;}

.footer-top{
  display:grid;
  grid-template-columns:minmax(260px,1.05fr) minmax(0,1.9fr);
  gap:clamp(26px,4vw,64px);
  padding-bottom:clamp(24px,3.4vw,40px);
  border-bottom:1px solid rgba(255,249,240,.16);
}
.footer-brand__title{
  margin:0 0 10px;
  font-size:22px;
  font-weight:900;
  letter-spacing:.05em;
  color:var(--cream);
}
.footer-brand__summary{
  margin:0 0 16px;
  max-width:34ch;
  font-size:15px;
  line-height:1.85;
  color:var(--on-dark);
}
.footer-brand__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--amber);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.footer-col__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--on-dark-soft);
}
.footer-list{
  display:grid;
  gap:9px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-link{
  display:inline-block;
  padding-bottom:1px;
  border-bottom:1px solid transparent;
  color:var(--on-dark);
  font-size:15px;
  text-decoration:none;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-link:hover{color:var(--amber);border-bottom-color:var(--amber);}
.footer-link:focus-visible{outline-color:var(--amber);}

.footer-contact{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:18px 28px;
  padding-block:clamp(20px,3vw,30px);
  border-bottom:1px solid rgba(255,249,240,.16);
}
.footer-contact__row{
  display:flex;
  flex-direction:column;
  gap:6px;
  margin:0;
  min-width:0;
}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--on-dark-soft);
}
.footer-contact__value{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:15px;
  line-height:1.7;
  color:var(--cream);
  word-break:break-word;
}
.copy-btn{
  flex:none;
  padding:2px 9px;
  border:1px solid rgba(255,249,240,.34);
  border-radius:2px;
  background:transparent;
  color:var(--on-dark);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.copy-btn:hover{color:var(--ink);background:var(--amber);border-color:var(--amber);}
.copy-btn[data-state="done"]{color:var(--ink);background:var(--teal);border-color:var(--teal);}
.copy-btn[data-state="fail"]{color:var(--cream);background:var(--clay);border-color:var(--clay);}

.footer-note{
  margin:0;
  padding-block:clamp(16px,2.4vw,24px);
  max-width:62ch;
  font-size:13px;
  line-height:1.8;
  color:var(--on-dark-soft);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:18px 26px;
  border-top:1px solid rgba(255,249,240,.14);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--on-dark-soft);
}
.footer-legal,.footer-icp{margin:0;}

/* ---------- 07 章节与纸张面板 ---------- */
.section{padding-block:clamp(38px,6vw,82px);}
.section__head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(14px,2.2vw,28px);
  align-items:start;
  margin-bottom:clamp(20px,3vw,36px);
}
.section__index{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(26px,3.6vw,42px);
  line-height:.96;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--orange);
  padding-top:4px;
}
.section__title{margin:0;font-size:clamp(1.4rem,2.4vw,1.9rem);}
.section__lede{
  margin:.55em 0 0;
  max-width:42ch;
  font-size:16px;
  line-height:1.85;
  color:var(--rock);
}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:var(--cream);
  border:2px solid var(--indigo);
  box-shadow:var(--stack-shadow);
}
.panel__head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px dashed var(--line-strong);
}
.panel__title{margin:0;font-size:1.05rem;font-weight:800;letter-spacing:.01em;}
.panel__body{font-size:15.5px;line-height:1.85;color:var(--indigo);}
.panel__body > :last-child{margin-bottom:0;}

/* ---------- 08 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);align-items:start;}

/* ---------- 09 正文排版 ---------- */
.prose{max-width:42em;font-size:17px;line-height:1.88;}
.prose p{margin:0 0 1em;}
.prose h2{font-size:clamp(1.32rem,2vw,1.6rem);margin:1.8em 0 .55em;}
.prose h3{font-size:1.1rem;margin:1.6em 0 .5em;}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.35em;}
.prose li{margin:.35em 0;}
.prose strong{font-weight:800;color:var(--ink);}
.prose code{
  font-family:var(--font-mono);
  font-size:.88em;
  padding:1px 6px;
  background:var(--indigo-soft);
  border-radius:2px;
}
.prose > :last-child{margin-bottom:0;}

/* ---------- 10 面包屑 ---------- */
.breadcrumb{padding-block:14px;border-bottom:1px solid var(--line);}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--rock);
}
.breadcrumb__item{display:flex;align-items:center;gap:8px;}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line-strong);}
.breadcrumb__link{
  color:var(--rock);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.breadcrumb__link:hover{color:var(--orange-deep);border-bottom-color:var(--orange);}

/* ---------- 11 标签 / 提示 / 数据 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line-strong);
  border-radius:2px;
  background:var(--cream);
  color:var(--indigo);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.6;
}
.tag--teal{border-color:var(--teal);background:rgba(0,158,115,.1);color:var(--teal-deep);}
.tag--amber{border-color:#C8871F;background:rgba(255,179,71,.24);color:#7A4E0B;}
.tag--clay{border-color:var(--clay);background:rgba(194,65,45,.08);color:var(--clay);}

.callout{
  padding:14px 18px;
  border-left:4px solid var(--orange);
  background:var(--cream);
  color:var(--indigo);
  font-size:15.5px;
  line-height:1.8;
  box-shadow:var(--paper-shadow);
}
.callout > :last-child{margin-bottom:0;}
.callout--teal{border-left-color:var(--teal);}
.callout--clay{border-left-color:var(--clay);}

.stat-row{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:1px;
  background:var(--line-strong);
  border:1px solid var(--line-strong);
}
.stat{padding:16px 18px;background:var(--cream);}
.stat__value{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(1.35rem,2.3vw,1.85rem);
  font-weight:600;
  line-height:1.1;
  color:var(--indigo);
}
.stat__label{
  display:block;
  margin-top:6px;
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--rock);
}

/* ---------- 12 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  background:var(--indigo-soft);
  border:2px solid var(--indigo);
  box-shadow:var(--stack-shadow);
}
.media--wide{aspect-ratio:21 / 9;}
.media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

/* ---------- 13 手风琴 / 可展开面板 ---------- */
.disclosure{border:2px solid var(--indigo);background:var(--cream);box-shadow:var(--stack-shadow);}
.disclosure__toggle{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  width:100%;
  padding:15px 18px;
  border:0;
  background:transparent;
  color:var(--indigo);
  font-family:var(--font-sans);
  font-size:15.5px;
  font-weight:700;
  line-height:1.5;
  text-align:left;
  cursor:pointer;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.disclosure__toggle::after{
  content:"+";
  flex:none;
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
  color:var(--orange);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.disclosure__toggle:hover{background:var(--indigo-soft);}
.disclosure__toggle[aria-expanded="true"]{background:var(--indigo);color:var(--cream);}
.disclosure__toggle[aria-expanded="true"]::after{content:"–";color:var(--amber);}
.disclosure__panel{
  display:none;
  padding:16px 18px;
  border-top:1px dashed var(--line-strong);
  font-size:15.5px;
  line-height:1.85;
}
.disclosure__panel[data-open]{display:block;animation:panelIn .28s var(--ease) both;}
.disclosure__panel > :last-child{margin-bottom:0;}
@keyframes panelIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}

/* ---------- 14 文本链接 ---------- */
.text-link{
  color:var(--orange-deep);
  font-weight:700;
  text-decoration:none;
  border-bottom:2px solid rgba(242,106,46,.36);
  padding-bottom:1px;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.text-link:hover{border-bottom-color:var(--orange);color:var(--ink);}

/* ---------- 15 响应式 ---------- */
@media (max-width:1120px){
  .header-readout{display:none;}
  .header-note{max-width:26ch;}
}
@media (max-width:1080px){
  .header-note{display:none;}
}
@media (max-width:960px){
  .footer-top{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .header-status{display:none;}
  .header-top__inner{min-height:62px;}
  .header-nav{display:none;}
  .site-header[data-open] .header-nav{display:block;}
  .header-nav__inner{display:block;}
  .site-nav{width:100%;}
  .nav-list{
    flex-direction:column;
    overflow:visible;
    padding-block:4px;
  }
  .nav-list__item{border-top:1px solid var(--line);}
  .nav-list__item:first-child{border-top:0;}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:13px 8px;
    border-bottom:0;
    border-left:3px solid transparent;
    font-size:15.5px;
  }
  .nav-link[aria-current="page"]{border-left-color:var(--orange);}
  .grid--2,.grid--3,.grid--split{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:720px){
  body{font-size:16.5px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 18px;}
  .footer-brand__summary{max-width:none;}
  .footer-bottom{font-size:11px;letter-spacing:.06em;}
  .section__head{grid-template-columns:auto minmax(0,1fr);}
  .breadcrumb{padding-block:12px;}
}
@media (max-width:560px){
  .header-actions .btn--sm{display:none;}
  .brand__title{font-size:17px;}
  .brand__line{letter-spacing:.3em;font-size:10px;}
  .band-reset,.footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-contact{grid-template-columns:minmax(0,1fr);}
  .media{aspect-ratio:4 / 3;}
  .media--wide{aspect-ratio:16 / 10;}
  .stat-row{grid-template-columns:repeat(2,minmax(0,1fr));}
}

/* ---------- 16 减少动效 ---------- */
@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;
  }
  .header-beam__fill{transition:none;}
  .btn--primary:hover{transform:none;}
}