/* =========================================================
   boye-now.com.cn — 共享站点样式 /assets/site.css
   ========================================================= */

/* 1) 变量 */
:root{
  --ink:#12100E;
  --ink-2:#241B16;
  --cream:#F5EEE4;
  --copper:#B87A3D;
  --copper-bright:#D9A469;
  --amber:#E7A63C;
  --teal:#17453C;
  --silver:#C7CCD1;
  --stone:#6E6157;
  --white:#FFFFFF;

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

  --header-h:84px;
  --rail:220px;
  --edge:clamp(20px,5vw,64px);
  --maxw:1240px;
  --hair:1px solid rgba(184,122,61,.35);
  --hair-soft:1px solid rgba(36,27,22,.14);
}

@media (max-width:960px){
  :root{--header-h:64px}
}

/* 2) Reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul[class],ol[class]{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}
main{display:block}
body.nav-open{overflow:hidden}

/* 3) 基础与中文排版 */
body{
  background:var(--cream);
  color:var(--ink-2);
  font-family:var(--font-sans);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.75;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-serif);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--ink);
}
h1{font-size:clamp(32px,4.8vw,54px)}
h2{font-size:clamp(26px,3.6vw,40px)}
h3{font-size:clamp(19px,2.2vw,24px)}
h4{font-size:17px}

p{max-width:68ch}
a{text-decoration:underline;text-decoration-color:rgba(184,122,61,.5);text-underline-offset:3px}
a:hover{text-decoration-color:var(--copper)}

:focus-visible{outline:2px solid var(--copper-bright);outline-offset:3px}

.sr-only{
  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;
}
.mono{font-family:var(--font-mono);letter-spacing:.08em}

/* 4) 布局工具 */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--edge)}
.container--narrow{max-width:820px}

.section{padding:clamp(56px,9vw,120px) 0;position:relative}
.section--cream{background:var(--cream);color:var(--ink-2)}
.section--dark{background:var(--ink);color:var(--cream)}
.section--deep{background:var(--ink-2);color:var(--cream)}
.section--teal{background:var(--teal);color:var(--white)}

.page-top{padding-top:calc(var(--header-h) + clamp(36px,6vw,76px))}

.section--dark h2,.section--dark h3,.section--deep h2,.section--deep h3,.section--teal h2,.section--teal h3{color:var(--cream)}

.section-title{
  font-family:var(--font-serif);
  font-size:clamp(28px,4.2vw,46px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.02em;
  margin:0 0 .5em;
}
.display-1{
  font-family:var(--font-serif);
  font-weight:900;
  font-size:clamp(44px,7vw,96px);
  line-height:.98;
  letter-spacing:-.03em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-size:12px;letter-spacing:.14em;font-weight:600;
  color:var(--copper);text-transform:uppercase;
  margin:0 0 14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}
.section--dark .eyebrow,.section--deep .eyebrow,.section--teal .eyebrow{color:var(--copper-bright)}

.lede{
  font-size:clamp(16px,1.6vw,18px);
  line-height:1.85;
  color:var(--stone);
  max-width:60ch;
}
.section--dark .lede,.section--deep .lede,.section--teal .lede{color:rgba(245,238,228,.76)}
.text-soft{color:var(--stone)}
.section--dark .text-soft,.section--deep .text-soft,.section--teal .text-soft{color:rgba(245,238,228,.7)}

.prose{max-width:64ch}
.prose p{margin:0 0 1.15em;line-height:1.85}
.prose h2,.prose h3{margin:1.6em 0 .6em}
.prose ul,.prose ol{margin:0 0 1.15em;padding-left:1.3em;list-style:disc}
.prose li{margin:.25em 0}

.divider{height:1px;background:rgba(184,122,61,.35);border:0;margin:clamp(28px,4vw,56px) 0}
.section--dark .divider,.section--deep .divider{background:rgba(184,122,61,.4)}

/* 5) 网格 */
.grid{display:grid;gap:clamp(18px,3vw,34px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr)}
.rail-layout{
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  gap:clamp(24px,4vw,64px);
  align-items:start;
}

/* 6) 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  padding:.95em 1.55em;
  border-radius:2px;
  border:1px solid transparent;
  font-family:var(--font-sans);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.06em;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--copper{background:var(--copper);color:var(--ink);border-color:var(--copper)}
.btn--copper:hover{background:var(--copper-bright);border-color:var(--copper-bright)}
.btn--ghost{background:transparent;color:var(--ink);border-color:rgba(36,27,22,.35)}
.btn--ghost:hover{border-color:var(--copper);color:var(--copper)}
.section--dark .btn--ghost,.section--deep .btn--ghost,.section--teal .btn--ghost{color:var(--cream);border-color:rgba(217,164,105,.55)}
.section--dark .btn--ghost:hover,.section--deep .btn--ghost:hover,.section--teal .btn--ghost:hover{color:var(--copper-bright);border-color:var(--copper-bright)}
.btn--silver{background:var(--silver);color:#20262b;border-color:rgba(18,16,14,.18)}
.btn--silver:hover{background:var(--white)}

/* 7) 门牌索引（章节刻度栏） */
.chapter-rail{
  position:sticky;top:calc(var(--header-h) + 26px);
  align-self:start;
  display:flex;flex-direction:column;gap:2px;
  border-left:1px solid rgba(184,122,61,.4);
}
.chapter-rail__link{
  display:flex;align-items:baseline;gap:10px;
  padding:10px 0 10px 16px;
  margin-left:-1px;
  border-left:2px solid transparent;
  font-size:13.5px;letter-spacing:.05em;
  color:var(--stone);text-decoration:none;
  transition:color .2s ease,border-color .2s ease;
}
.chapter-rail__link:hover{color:var(--ink)}
.chapter-rail__link.is-active,
.chapter-rail__link[aria-current]{
  color:var(--ink);font-weight:600;border-left-color:var(--copper);
}
.chapter-rail__num{font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;color:var(--copper)}
.chapter-rail--on-dark{border-left-color:rgba(217,164,105,.4)}
.chapter-rail--on-dark .chapter-rail__link{color:rgba(245,238,228,.6)}
.chapter-rail--on-dark .chapter-rail__link:hover{color:var(--cream)}
.chapter-rail--on-dark .chapter-rail__link.is-active,
.chapter-rail--on-dark .chapter-rail__link[aria-current]{color:var(--cream);border-left-color:var(--copper-bright)}
.chapter-rail--on-dark .chapter-rail__num{color:var(--copper-bright)}

/* 8) 展签卡片 */
.plate{
  position:relative;display:block;
  padding:clamp(20px,2.6vw,30px);
  background:var(--white);
  border:1px solid rgba(36,27,22,.14);
  border-top:2px solid var(--copper);
  color:inherit;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.plate:hover{
  transform:translateY(-2px);
  border-color:var(--copper);
  box-shadow:0 18px 32px -24px rgba(18,16,14,.75);
}
.plate--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%)}
.plate--dark{background:var(--ink-2);color:var(--cream);border-color:rgba(184,122,61,.32);border-top-color:var(--copper-bright)}
.plate--silver{background:var(--silver);color:#20262b;border-top-color:#8e979e}
.plate__num{
  display:block;margin-bottom:12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--copper);
}
.plate--dark .plate__num{color:var(--copper-bright)}
.plate--silver .plate__num{color:#4c565d}
.plate__title{
  font-family:var(--font-serif);
  font-size:clamp(19px,2.2vw,24px);
  font-weight:800;line-height:1.25;letter-spacing:-.01em;
  margin:0 0 .45em;
}
.plate__text{margin:0;font-size:14.5px;line-height:1.8;color:var(--stone)}
.plate--dark .plate__text{color:rgba(245,238,228,.72)}
.plate--silver .plate__text{color:#4c565d}

/* 9) 规则摘要 */
.rule-summary{
  border-left:3px solid var(--amber);
  background:rgba(231,166,60,.12);
  padding:18px 20px;
  font-size:15px;line-height:1.95;
  color:var(--stone);
}
.rule-summary__label{
  display:block;margin:0 0 8px;
  font-size:12px;letter-spacing:.14em;font-weight:600;
  color:var(--copper);
}
.section--dark .rule-summary,.section--deep .rule-summary{
  background:rgba(231,166,60,.14);
  color:rgba(245,238,228,.84);
}
.section--dark .rule-summary__label,.section--deep .rule-summary__label{color:var(--amber)}

/* 10) 折叠面板 */
.accordion{border-top:var(--hair-soft)}
.accordion__item{border-bottom:var(--hair-soft)}
.accordion__trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;
  background:none;border:0;
  text-align:left;font-family:inherit;font-size:16px;font-weight:600;
  color:inherit;cursor:pointer;
}
.accordion__trigger:hover{color:var(--copper)}
.accordion__icon{position:relative;flex:0 0 auto;width:14px;height:14px}
.accordion__icon::before,.accordion__icon::after{content:"";position:absolute;background:var(--copper)}
.accordion__icon::before{left:0;right:0;top:6px;height:1.5px}
.accordion__icon::after{top:0;bottom:0;left:6px;width:1.5px;transition:transform .24s ease}
.accordion__item[data-open="true"] .accordion__icon::after{transform:scaleY(0)}
.accordion__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s ease}
.accordion__item[data-open="true"] .accordion__panel{grid-template-rows:1fr}
.accordion__inner{overflow:hidden}
.accordion__inner p{
  margin:0 0 18px;padding-right:26px;
  font-size:15px;line-height:1.95;color:var(--stone);
}
.section--dark .accordion,.section--deep .accordion{border-top-color:rgba(245,238,228,.16)}
.section--dark .accordion__item,.section--deep .accordion__item{border-bottom-color:rgba(245,238,228,.16)}
.section--dark .accordion__inner p,.section--deep .accordion__inner p{color:rgba(245,238,228,.74)}

/* 11) 面包屑 */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 22px;
  font-size:12px;letter-spacing:.08em;
  color:var(--stone);
}
.breadcrumb__link{color:inherit;text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb__link:hover{color:var(--copper);border-bottom-color:var(--copper)}
.breadcrumb__sep{color:rgba(184,122,61,.7)}
.breadcrumb__current{color:var(--ink);font-weight:600}
.section--dark .breadcrumb,.section--deep .breadcrumb{color:rgba(245,238,228,.6)}
.section--dark .breadcrumb__current,.section--deep .breadcrumb__current{color:var(--cream)}

/* 12) 图片容器基础规则 */
.img-frame{
  --ar:4/3;
  position:relative;
  aspect-ratio:var(--ar);
  width:100%;
  overflow:hidden;
  background:var(--ink-2);
  border:1px solid rgba(184,122,61,.35);
}
.img-frame img{width:100%;height:100%;object-fit:cover}
.img-frame--wide{--ar:16/9}
.img-frame--tall{--ar:3/4}
.img-frame--square{--ar:1/1}
.img-frame--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 34px),calc(100% - 34px) 100%,0 100%)}
.img-frame--placeholder{
  background-color:var(--ink-2);
  background-image:repeating-linear-gradient(45deg,rgba(184,122,61,.16) 0 1px,transparent 1px 12px);
}
.img-frame__caption{
  margin-top:10px;
  font-size:13px;line-height:1.7;letter-spacing:.02em;
  color:var(--stone);
}
.section--dark .img-frame__caption,.section--deep .img-frame__caption{color:rgba(245,238,228,.6)}
figure.img-frame{margin:0}

/* 13) 首屏出血容器（供页面首个深色区块使用） */
.hero--bleed{
  position:relative;
  padding-top:calc(var(--header-h) + clamp(48px,8vw,110px));
  padding-bottom:clamp(48px,8vw,110px);
  background:var(--ink);
  color:var(--cream);
  overflow:hidden;
}

/* 14) 显现动效 */
.js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.js [data-reveal].is-inview{opacity:1;transform:none}

/* 15) 头部 */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;
  background:var(--copper-bright);color:var(--ink);
  font-size:13px;font-weight:600;letter-spacing:.06em;
  text-decoration:none;border-radius:2px;
  transform:translateY(-160%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  color:var(--cream);
  background:linear-gradient(180deg,rgba(18,16,14,.9) 0%,rgba(18,16,14,.6) 62%,rgba(18,16,14,0) 100%);
  transition:background .28s ease,box-shadow .28s ease;
}
.site-header[data-scrolled="true"]{
  background:var(--ink);
  box-shadow:0 1px 0 rgba(184,122,61,.5),0 22px 44px -34px rgba(0,0,0,.95);
}
.site-header__inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--edge);
  height:var(--header-h);
  display:flex;align-items:center;
  gap:clamp(14px,2.6vw,34px);
}

.read-progress{
  position:fixed;top:0;left:0;right:0;height:3px;
  background:rgba(184,122,61,.18);z-index:120;pointer-events:none;
}
.read-progress__fill{
  display:block;height:100%;width:100%;
  background:var(--copper);
  transform:scaleX(0);transform-origin:left center;
}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;text-decoration:none;color:var(--cream)}
.brand__mark{
  width:40px;height:40px;flex:0 0 auto;
  display:grid;place-items:center;
  border:1px solid var(--copper);
  background:rgba(184,122,61,.14);
  color:var(--copper-bright);
  font-family:var(--font-serif);font-weight:800;font-size:19px;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  transition:background .2s ease,color .2s ease;
}
.brand:hover .brand__mark{background:rgba(184,122,61,.3);color:var(--white)}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__name{font-family:var(--font-serif);font-weight:800;font-size:17px;letter-spacing:.04em}
.brand__sub{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.2em;color:var(--copper-bright);opacity:.85}

.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(10px,1.8vw,26px)}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 2px;
  font-size:14.5px;letter-spacing:.05em;
  color:rgba(245,238,228,.82);
  text-decoration:none;
  transition:color .2s ease;
}
.site-nav__num{font-size:9.5px;letter-spacing:.08em;color:var(--copper);opacity:.8;transform:translateY(-2px)}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--copper);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s ease;
}
.site-nav__link:hover{color:var(--white)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--copper-bright)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--copper-bright);opacity:1}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--copper-bright)}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:clamp(8px,1.6vw,20px)}
.quick-slot{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 12px;
  background:var(--silver);color:#20262b;
  border:1px solid rgba(18,16,14,.2);
  font-size:12px;letter-spacing:.08em;text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% 100%,10px 100%,0 calc(100% - 10px));
  transition:background .2s ease;
}
.quick-slot:hover{background:var(--white)}
.quick-slot__glyph{position:relative;width:11px;height:13px;border:1.5px solid currentColor;border-radius:2px}
.quick-slot__glyph::after{content:"";position:absolute;left:50%;top:-4px;width:1.5px;height:4px;background:currentColor;transform:translateX(-50%)}
.quick-slot__label{white-space:nowrap}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 11px;
  background:transparent;
  border:1px solid rgba(184,122,61,.6);
  border-radius:2px;
  color:var(--cream);
  font-size:12px;letter-spacing:.1em;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--copper-bright);color:var(--copper-bright)}
.nav-toggle__bars{display:grid;gap:3px}
.nav-toggle__bar{display:block;width:16px;height:1.5px;background:currentColor;transition:transform .24s ease,opacity .24s ease}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(1){transform:translateY(4.5px) 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(-4.5px) rotate(-45deg)}

/* 16) 页脚 */
.site-footer{
  background:var(--ink-2);
  color:rgba(245,238,228,.76);
  border-top:1px solid rgba(184,122,61,.5);
  padding:clamp(44px,7vw,84px) 0 26px;
  font-size:14px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.3fr) repeat(3,minmax(0,.8fr));
  gap:clamp(24px,4vw,48px);
  padding-bottom:clamp(28px,4vw,46px);
  border-bottom:1px solid rgba(184,122,61,.28);
}
.footer-brand__mark{
  width:44px;height:44px;margin-bottom:14px;
  display:grid;place-items:center;
  border:1px solid var(--copper);
  background:rgba(184,122,61,.16);
  color:var(--copper-bright);
  font-family:var(--font-serif);font-weight:800;font-size:20px;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.footer-brand__name{
  font-family:var(--font-serif);font-size:19px;font-weight:800;
  color:var(--cream);letter-spacing:.04em;margin:0 0 10px;
}
.footer-brand__line{margin:0 0 18px;max-width:32ch;line-height:1.85;color:rgba(245,238,228,.62);font-size:13.5px}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-sans);
  font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--copper-bright);text-transform:uppercase;
}
.footer-list{display:grid;gap:9px}
.footer-list--inline{display:flex;flex-wrap:wrap;gap:8px 16px}
.footer-list__link{
  font-size:13.5px;
  color:rgba(245,238,228,.78);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-list__link:hover{color:var(--copper-bright);border-bottom-color:rgba(217,164,105,.65)}
.footer-contact{display:grid;gap:12px}
.footer-contact__row{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:10px;align-items:baseline;
  font-size:13.5px;line-height:1.75;
}
.footer-contact__key{font-size:11.5px;letter-spacing:.12em;color:var(--copper)}
.footer-contact__val{color:rgba(245,238,228,.84);word-break:break-word}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;
  gap:10px 24px;
  padding-top:22px;
  font-size:12px;letter-spacing:.06em;
}
.footer-copy{margin:0;max-width:none;color:rgba(245,238,228,.55)}
.footer-legal{margin:0;color:rgba(245,238,228,.55);letter-spacing:.1em}

/* 17) 响应式 */
@media (max-width:1080px){
  .footer-top{grid-template-columns:minmax(0,1.2fr) repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;left:0;right:0;top:var(--header-h);
    display:none;
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    padding:6px var(--edge) 30px;
    background:var(--ink);
    border-top:1px solid rgba(184,122,61,.4);
    box-shadow:0 34px 60px -32px rgba(0,0,0,.95);
  }
  .site-header[data-open="true"] .site-nav{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(245,238,228,.1)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    padding:16px 4px;
    font-family:var(--font-serif);font-size:17px;font-weight:700;
  }
  .site-nav__link::after{display:none}
  .site-nav__num{font-size:11px;transform:translateY(-1px)}
  .brand__mark{width:36px;height:36px;font-size:17px}
  .brand__name{font-size:15.5px}
  .header-actions{margin-left:auto}
  .quick-slot{padding:8px 10px;font-size:11.5px}
  .rail-layout{grid-template-columns:minmax(0,1fr)}
  .chapter-rail{position:static;flex-direction:row;flex-wrap:wrap;gap:0 6px;border-left:0;border-top:1px solid rgba(184,122,61,.4);padding-top:8px}
  .chapter-rail__link{padding:8px 10px 8px 0;border-left:0;border-bottom:2px solid transparent}
  .chapter-rail__link.is-active,.chapter-rail__link[aria-current]{border-left:0;border-bottom-color:var(--copper)}
  .chapter-rail--on-dark .chapter-rail__link.is-active,.chapter-rail--on-dark .chapter-rail__link[aria-current]{border-bottom-color:var(--copper-bright)}
}

@media (max-width:820px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--asym{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:620px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-contact__row{grid-template-columns:38px minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .quick-slot__label{display:none}
  .quick-slot{padding:9px 10px}
  .nav-toggle__text{display:none}
}

@media (max-width:380px){
  .brand__sub{display:none}
}

/* 18) 减少动效 */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}
  .js [data-reveal]{opacity:1;transform:none}
  .btn:hover,.plate:hover{transform:none}
  .accordion__panel{transition:none}
}