/* =========================================================
   斗球主页 · 共享样式  /assets/site.css
   高原竞技场：左侧品牌轨道 + 右侧正文横向层级
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --red-clay:#9E2B1F;
  --red-deep:#6B1A12;
  --turq:#1F6F63;
  --lake:#0E3B36;
  --turq-lite:#8CC3B4;
  --gold:#D9A441;
  --gold-lite:#F1E2BE;
  --cream:#F6F1E7;
  --paper:#FFFFFF;
  --ink:#14100E;
  --taupe:#6E6259;

  --line:rgba(20,16,14,.14);
  --line-soft:rgba(241,226,190,.22);

  --rail-w:88px;
  --max:1360px;
  --gutter:clamp(1.1rem,3.6vw,2.6rem);

  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --r-pill:999px;

  --ease:cubic-bezier(.22,.61,.36,1);

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

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
img,svg,video{max-width:100%;height:auto;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
table{border-collapse:collapse;width:100%;}

/* ---------- 3. 中文排版与基础 ---------- */
body{
  padding-left:var(--rail-w);
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:clamp(16px,.35vw + 15px,18px);
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-weight:300;letter-spacing:-.02em;line-height:1.08;}
h1{font-size:clamp(2.6rem,6.5vw,5.2rem);}
h2{font-size:clamp(1.9rem,3.6vw,2.75rem);}
h3{font-size:clamp(1.2rem,1.8vw,1.55rem);font-weight:500;letter-spacing:-.01em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
strong{font-weight:900;}
hr{border:0;border-top:1px solid var(--line);margin:2rem 0;}

.display{font-size:clamp(2.6rem,6.5vw,5.2rem);font-weight:300;line-height:1.05;letter-spacing:-.02em;}
.h-2{font-size:clamp(1.6rem,3vw,2rem);font-weight:300;letter-spacing:-.02em;line-height:1.15;}
.h-3{font-size:clamp(1.15rem,1.7vw,1.4rem);font-weight:500;line-height:1.3;}
.lead{font-size:clamp(1.04rem,1.4vw,1.2rem);line-height:1.78;max-width:34em;}
.mono,.num{font-family:var(--font-mono);font-weight:500;letter-spacing:.02em;font-variant-numeric:tabular-nums;}
.index-label{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--taupe);
  margin-bottom:.9rem;
}
.index-label--onDark{color:var(--turq-lite);}
.index-label--gold{color:var(--gold);}

.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  border:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;
}

:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:6px;}

#main-content{outline:none;}
#main-content,[data-section]{scroll-margin-top:108px;}

/* ---------- 4. 布局容器与网格 ---------- */
.wrap{
  width:min(var(--max),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
}
.section{padding-block:clamp(3rem,7vw,6rem);}
.section--cream{background:var(--cream);color:var(--ink);}
.section--lake{background:var(--lake);color:var(--gold-lite);}
.section--turq{background:var(--turq);color:#fff;}
.section--tight{padding-block:clamp(1.8rem,4vw,3rem);}

.grid{display:grid;gap:clamp(1rem,2.4vw,2rem);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.col-main{grid-column:span 7;min-width:0;}
.col-aside{grid-column:span 3;min-width:0;}
.col-breath{grid-column:span 2;min-width:0;}
.measure{max-width:68ch;}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:.6rem;
  left:calc(var(--rail-w) + .8rem);
  z-index:120;
  transform:translateY(-180%);
  background:var(--ink);
  color:var(--gold-lite);
  padding:.72rem 1.15rem;
  border-radius:var(--r-pill);
  font-size:.85rem;
  letter-spacing:.04em;
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 6. 左侧品牌轨道 ---------- */
.brand-rail{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail-w);
  z-index:70;
  background:var(--lake);
  border-right:1px solid rgba(217,164,65,.3);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:1.5rem 0 1.6rem;
}
.brand-rail__brand{display:flex;flex-direction:column;align-items:center;gap:.8rem;}
.brand-rail__glyph{
  width:42px;height:42px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--red-clay);
  color:var(--gold-lite);
  font-size:1.2rem;font-weight:900;
  border:1px solid var(--gold);
}
.brand-rail__name{
  writing-mode:vertical-rl;
  font-size:.76rem;
  letter-spacing:.34em;
  color:var(--gold-lite);
}
.brand-rail__seal{
  width:10px;height:10px;border-radius:3px;
  background:var(--gold);
  transform:rotate(45deg);
  opacity:.85;
}

.rail-scale{display:flex;justify-content:center;flex:0 1 auto;}
.rail-scale__list{display:flex;flex-direction:column;align-items:center;gap:.9rem;}
.rail-scale__item{display:block;}
.rail-scale__jump{
  position:relative;
  display:block;
  padding:5px;
  border-radius:50%;
  cursor:pointer;
  transition:transform .18s var(--ease);
}
.rail-scale__dot{
  display:block;width:8px;height:8px;border-radius:50%;
  background:transparent;
  border:1px solid rgba(241,226,190,.55);
  transition:background .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.rail-scale__jump:hover .rail-scale__dot{border-color:var(--gold);}
.rail-scale__jump[aria-current="true"] .rail-scale__dot{
  background:var(--gold);border-color:var(--gold);transform:scale(1.4);
}
.rail-scale__label{
  position:absolute;left:calc(100% + 10px);top:50%;
  transform:translateY(-50%) translateX(-6px);
  white-space:nowrap;
  background:var(--ink);color:var(--gold-lite);
  font-size:.72rem;letter-spacing:.1em;
  padding:.34rem .62rem;border-radius:var(--r-pill);
  opacity:0;pointer-events:none;
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.rail-scale__jump:hover .rail-scale__label,
.rail-scale__jump:focus-visible .rail-scale__label{
  opacity:1;transform:translateY(-50%) translateX(0);
}

/* ---------- 7. 阅读进度 ---------- */
.read-progress{
  position:fixed;
  top:0;left:var(--rail-w);right:0;
  height:3px;
  z-index:95;
  background:rgba(20,16,14,.08);
  pointer-events:none;
}
.read-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--red-clay),var(--gold));
}

/* ---------- 8. 上层信息条 ---------- */
.topbar{
  background:var(--cream);
  border-bottom:1px solid var(--line);
  max-height:80px;
  overflow:hidden;
  transition:max-height .28s var(--ease),opacity .2s var(--ease),border-color .28s var(--ease);
}
.topbar__inner{
  max-width:var(--max);
  margin-inline:auto;
  padding:.68rem var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  font-size:.78rem;
  letter-spacing:.08em;
  color:var(--taupe);
}
.topbar__claim{display:inline-flex;align-items:center;gap:.55rem;margin:0;color:var(--ink);}
.topbar__spark{
  width:7px;height:7px;border-radius:50%;
  background:var(--red-clay);
  box-shadow:0 0 0 3px rgba(158,43,31,.14);
}
.topbar__meta{display:inline-flex;align-items:center;gap:1.1rem;}
.topbar__item{white-space:nowrap;}
.topbar__item--icp{font-family:var(--font-mono);letter-spacing:.06em;color:var(--red-deep);}

/* ---------- 9. 主导航 ---------- */
.navbar{
  position:sticky;
  top:0;
  z-index:85;
  background:var(--cream);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.navbar__inner{
  max-width:var(--max);
  margin-inline:auto;
  padding:.8rem var(--gutter);
  display:flex;
  align-items:center;
  gap:1rem;
  min-height:64px;
}
.navbar__brand{
  display:none;
  align-items:center;
  gap:.5rem;
  font-size:1.05rem;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--ink);
}
.navbar__brand-dot{
  width:10px;height:10px;border-radius:3px;
  background:var(--red-clay);
  transform:rotate(45deg);
}

.mainnav{display:flex;align-items:center;gap:.7rem;margin-left:auto;}
.mainnav__list{display:flex;align-items:center;gap:.15rem;}
.mainnav__link{
  display:inline-flex;
  align-items:center;
  padding:.5rem .82rem;
  border-radius:var(--r-pill);
  font-size:.92rem;
  font-weight:500;
  color:var(--ink);
  white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.mainnav__link:hover{background:rgba(31,111,99,.12);transform:translateY(-2px);}
.mainnav__link[aria-current="page"]{background:var(--turq);color:#fff;}
.mainnav__link[aria-current="page"]::after{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--gold);
  margin-left:.5rem;
}
.mainnav__cta{flex:0 0 auto;padding:.62rem 1.15rem;font-size:.88rem;}

/* 压缩态：上层收起，下层变胶囊 */
.site-header.is-condensed .topbar{
  max-height:0;opacity:0;border-bottom-color:transparent;
}
.site-header.is-condensed .navbar{
  background:transparent;
  border-bottom-color:transparent;
}
.site-header.is-condensed .navbar__inner{
  max-width:min(var(--max),calc(100% - var(--gutter) * 2));
  margin:.6rem auto;
  min-height:0;
  padding:.32rem .6rem .32rem 1.1rem;
  background:var(--lake);
  border-radius:var(--r-pill);
  box-shadow:0 14px 34px rgba(14,59,54,.24);
}
.site-header.is-condensed .mainnav__link{color:var(--gold-lite);}
.site-header.is-condensed .mainnav__link:hover{background:rgba(241,226,190,.14);}
.site-header.is-condensed .mainnav__link[aria-current="page"]{background:var(--gold);color:var(--ink);}

/* ---------- 10. 移动导航开关 ---------- */
.nav-toggle{
  display:none;
  margin-left:auto;
  width:46px;height:46px;
  border-radius:50%;
  border:1.5px solid var(--red-clay);
  background:transparent;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(158,43,31,.1);}
.nav-toggle__bars{display:flex;flex-direction:column;align-items:center;gap:5px;}
.nav-toggle__bar{
  display:block;
  width:20px;height:2px;
  border-radius:2px;
  background:var(--red-clay);
  transition:transform .22s var(--ease),opacity .18s var(--ease),background .18s var(--ease);
}
.site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0;}
.site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.nav-scrim{
  position:fixed;
  inset:0;
  background:rgba(14,59,54,.55);
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
  z-index:-1;
}
.site-header[data-open] .nav-scrim{opacity:1;visibility:visible;}

/* ---------- 11. 公告胶囊 ---------- */
.announce-dock{
  position:fixed;
  right:clamp(.9rem,2.4vw,1.7rem);
  bottom:clamp(.9rem,2.4vw,1.5rem);
  z-index:74;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:.55rem;
  transition:opacity .2s var(--ease);
}
.site-header[data-open] .announce-dock{opacity:0;pointer-events:none;}
.announce-dock__toggle{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.6rem 1.05rem;
  border-radius:var(--r-pill);
  border:1px solid rgba(241,226,190,.36);
  background:var(--lake);
  color:var(--gold-lite);
  font-size:.8rem;
  font-weight:500;
  letter-spacing:.06em;
  cursor:pointer;
  box-shadow:0 10px 26px rgba(14,59,54,.28);
  transition:transform .18s var(--ease),background .18s var(--ease);
}
.announce-dock__toggle:hover{transform:translateY(-4px);background:var(--turq);}
.announce-dock__pulse{
  position:relative;
  width:8px;height:8px;border-radius:50%;
  background:var(--gold);
}
.announce-dock__pulse::after{
  content:"";
  position:absolute;inset:-4px;
  border-radius:50%;
  border:1px solid var(--gold);
  animation:dockPulse 2.4s ease-out infinite;
}
@keyframes dockPulse{
  0%{transform:scale(.6);opacity:.65;}
  70%{transform:scale(1.6);opacity:0;}
  100%{transform:scale(1.6);opacity:0;}
}
.announce-dock__panel{
  width:min(282px,74vw);
  background:var(--paper);
  border:1.5px solid var(--red-clay);
  border-radius:var(--r-md);
  padding:1rem 1.1rem;
  box-shadow:0 18px 38px rgba(20,16,14,.18);
}
.announce-dock__panel[hidden]{display:none;}
.announce-dock__title{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--red-clay);
  margin:0 0 .45rem;
}
.announce-dock__body{font-size:.86rem;line-height:1.62;color:var(--ink);margin:0 0 .75rem;}
.announce-dock__link{
  font-size:.82rem;
  font-weight:700;
  color:var(--turq);
  border-bottom:1.5px solid var(--gold);
  padding-bottom:2px;
}
.announce-dock__link:hover{color:var(--red-clay);}

/* ---------- 12. 通用按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.85rem 1.5rem;
  border-radius:var(--r-pill);
  border:1.5px solid transparent;
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.02em;
  cursor:pointer;
  text-align:center;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{transform:translateY(-4px);}
.btn--primary{background:var(--red-clay);color:#fff;}
.btn--primary:hover{background:var(--red-deep);}
.btn--ghost{border-color:var(--red-clay);color:var(--red-clay);background:transparent;}
.btn--ghost:hover{background:var(--red-clay);color:#fff;}
.btn--gold{background:var(--gold);color:var(--ink);}
.btn--gold:hover{background:var(--gold-lite);}
.btn--turq{background:var(--turq);color:#fff;}
.btn--turq:hover{background:var(--lake);}
.btn--block{display:flex;width:100%;}

.chip{
  display:inline-flex;
  align-items:center;
  gap:.42rem;
  padding:.32rem .8rem;
  border-radius:var(--r-pill);
  font-size:.78rem;
  font-weight:500;
  letter-spacing:.08em;
  background:var(--gold-lite);
  color:var(--red-deep);
  border:1px solid rgba(158,43,31,.25);
}
.chip--live{background:var(--turq);color:#fff;border-color:transparent;}
.chip--plain{background:transparent;color:var(--taupe);border-color:var(--line);}

/* ---------- 13. 面包屑 ---------- */
.breadcrumb{padding-block:1rem;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;font-size:.78rem;letter-spacing:.08em;color:var(--taupe);}
.breadcrumb li{display:inline-flex;align-items:center;gap:.45rem;}
.breadcrumb li + li::before{content:"/";color:var(--gold);}
.breadcrumb a{color:var(--taupe);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease);}
.breadcrumb a:hover{color:var(--red-clay);border-bottom-color:var(--red-clay);}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:500;}

/* ---------- 14. 框景窗口 ---------- */
.frame{
  position:relative;
  border:2px solid var(--red-clay);
  border-radius:var(--r-lg);
  padding:clamp(1.3rem,3.4vw,2.6rem);
  background:var(--cream);
}
.frame::before{
  content:"";
  position:absolute;
  top:-2px;left:clamp(1.4rem,5vw,3.4rem);
  width:78px;height:4px;
  background:var(--gold);
  border-radius:0 0 4px 4px;
}
.frame--offset{margin-top:clamp(0px,2vw,24px);margin-left:clamp(0px,2vw,32px);}
.frame--onLake{border-color:var(--gold);background:transparent;}

/* ---------- 15. 卡片 ---------- */
.card{
  background:var(--paper);
  border:1.5px solid var(--line);
  border-radius:var(--r-md);
  padding:clamp(1.1rem,2vw,1.6rem);
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--red-clay);}
.card__title{font-size:1.08rem;font-weight:500;margin:0 0 .5rem;}
.card__meta{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  color:var(--taupe);
  margin-bottom:.7rem;
}
.card__text{font-size:.94rem;color:var(--taupe);}

/* ---------- 16. 图片容器基础规则 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--r-lg);
  background:var(--lake);
  border:2px solid var(--red-clay);
  aspect-ratio:16 / 9;
  margin:0;
}
.media__img{width:100%;height:100%;object-fit:cover;}
.media__cap{
  position:absolute;
  left:0;bottom:0;
  padding:.5rem .9rem;
  background:var(--lake);
  color:var(--gold-lite);
  font-size:.74rem;
  letter-spacing:.1em;
  border-radius:0 var(--r-sm) 0 0;
}
.media--wide{aspect-ratio:21 / 9;}
.media--tall{aspect-ratio:4 / 5;}
.media--square{aspect-ratio:1 / 1;}
.media--plain{border-color:transparent;background:var(--gold-lite);}

/* ---------- 17. 滚动显现 ---------- */
[data-reveal]{transition:opacity .55s var(--ease),transform .55s var(--ease);}
.reveal-ready [data-reveal]:not(.is-revealed){opacity:0;transform:translateY(14px);}
.reveal-stagger > [data-reveal]:nth-child(2){transition-delay:.06s;}
.reveal-stagger > [data-reveal]:nth-child(3){transition-delay:.12s;}
.reveal-stagger > [data-reveal]:nth-child(4){transition-delay:.18s;}
.reveal-stagger > [data-reveal]:nth-child(n+5){transition-delay:.24s;}

/* ---------- 18. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--lake);
  color:var(--gold-lite);
  padding:clamp(2.6rem,6vw,4.4rem) 0 1.5rem;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:6px;
  background:var(--red-clay);
}
.site-footer__inner{
  width:min(var(--max),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(190px,1.05fr) minmax(0,2.6fr);
  gap:clamp(2rem,5vw,4rem);
  padding-bottom:clamp(2rem,4.5vw,3.2rem);
  border-bottom:1px solid var(--line-soft);
}
.site-footer__lead{display:flex;flex-direction:column;}
.site-footer__brand{
  display:inline-flex;
  align-items:center;
  gap:.65rem;
  font-size:1.35rem;
  font-weight:900;
  letter-spacing:.02em;
  color:#fff;
}
.site-footer__glyph{
  width:38px;height:38px;
  border-radius:50%;
  display:grid;place-items:center;
  background:var(--red-clay);
  color:var(--gold-lite);
  font-size:1.05rem;
  font-weight:900;
  border:1px solid var(--gold);
}
.site-footer__note{
  margin:1.1rem 0 0;
  font-size:.86rem;
  letter-spacing:.1em;
  color:var(--turq-lite);
}
.site-footer__cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(1.2rem,3vw,2.4rem);
}
.foot-col{min-width:0;}
.foot-col__title{
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--gold);
  margin:0 0 1rem;
}
.foot-col__list{display:flex;flex-direction:column;gap:.55rem;font-size:.9rem;}
.foot-col__list a{
  display:inline-block;
  color:var(--gold-lite);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.foot-col__list a:hover{color:var(--gold);transform:translateX(3px);}
.foot-col__list--plain li{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  color:var(--turq-lite);
  line-height:1.65;
}
.foot-key{
  color:var(--gold);
  font-size:.78rem;
  letter-spacing:.08em;
  min-width:4.4em;
}
.foot-note{
  margin-top:.3rem;
  font-size:.78rem;
  line-height:1.6;
  color:rgba(140,195,180,.92);
}
.site-footer__base{
  width:min(var(--max),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
  padding-top:1.25rem;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.5rem 1.6rem;
  font-size:.78rem;
  letter-spacing:.06em;
  color:rgba(241,226,190,.74);
}
.site-footer__base p{margin:0;}
.site-footer__icp{font-family:var(--font-mono);color:var(--gold-lite);}

/* ---------- 19. 平板 ---------- */
@media (max-width:1120px){
  .mainnav__link{padding:.44rem .62rem;font-size:.86rem;}
  .mainnav__cta{padding:.55rem .95rem;font-size:.82rem;}
  .site-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1024px){
  .col-main{grid-column:span 12;}
  .col-aside{grid-column:span 12;}
  .col-breath{display:none;}
  .site-footer__inner{grid-template-columns:1fr;}
}

/* ---------- 20. 手机 ---------- */
@media (max-width:920px){
  :root{--rail-w:0px;}
  body{padding-left:0;}
  .brand-rail{display:none;}
  .skip-link{left:.8rem;}
  .topbar{display:none;}

  .navbar__brand{display:inline-flex;}
  .nav-toggle{display:flex;}

  .mainnav{
    position:fixed;
    top:0;right:0;bottom:0;
    left:auto;
    width:min(88vw,380px);
    margin-left:0;
    background:var(--lake);
    color:var(--gold-lite);
    padding:5.2rem 1.5rem 2rem;
    display:block;
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .3s var(--ease);
    z-index:1;
    box-shadow:-18px 0 42px rgba(14,59,54,.34);
  }
  .site-header[data-open] .mainnav{transform:translateX(0);}
  .mainnav__list{flex-direction:column;align-items:stretch;gap:.1rem;}
  .mainnav__link{
    display:flex;
    justify-content:space-between;
    padding:.95rem .6rem;
    border-radius:0;
    border-bottom:1px solid var(--line-soft);
    font-size:1.05rem;
    color:var(--gold-lite);
  }
  .mainnav__link:hover{background:transparent;transform:none;color:var(--gold);}
  .mainnav__link[aria-current="page"]{
    background:transparent;
    color:var(--gold);
  }
  .mainnav__link[aria-current="page"]::after{margin-left:auto;}
  .mainnav__cta{margin-top:1.4rem;width:100%;}
  .navbar__inner{padding:.7rem var(--gutter);}
  .announce-dock__toggle{font-size:.74rem;padding:.5rem .85rem;}
}

@media (max-width:560px){
  .site-footer__cols{grid-template-columns:1fr;}
  .site-footer__base{flex-direction:column;align-items:flex-start;}
  .announce-dock__toggle span:last-child{display:none;}
}

/* ---------- 21. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    transition-delay:0s !important;
  }
  .reveal-ready [data-reveal]:not(.is-revealed){opacity:1;transform:none;}
}