/* ============================================================
   博电竞赛区 · 共享样式 /assets/site.css
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;}
button{background:none;border:0;font:inherit;color:inherit;cursor:pointer;}
input{font:inherit;color:inherit;}
img,svg,video{display:block;max-width:100%;}
[hidden]{display:none !important;}

/* ---------- 2. tokens ---------- */
:root{
  --ink-900:#03050F;
  --ink-800:#070B1F;
  --ink-700:#0E1633;
  --ink-600:#1C2748;
  --cyan:#35F0E0;
  --violet:#8C5BFF;
  --amber:#FF8A3D;
  --frost:#EAF2FF;
  --mist:#93A4C8;
  --mint:#5CE1A0;

  --bg:var(--ink-800);
  --surface:var(--ink-700);
  --surface-2:var(--ink-600);
  --text:var(--frost);
  --text-dim:var(--mist);

  --edge:1px solid rgba(147,164,200,.20);
  --edge-hot:1px solid rgba(53,240,224,.45);
  --edge-violet:1px solid rgba(140,91,255,.42);

  --font-display:"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-body:var(--font-display);
  --font-data:ui-monospace,SFMono-Regular,Menlo,Consolas,"JetBrains Mono","Courier New",monospace;

  --shell:1280px;
  --gut:clamp(16px,4vw,44px);
  --stack:clamp(48px,7vw,96px);
  --shadow-paper:10px 12px 0 rgba(3,5,15,.85);
  --shadow-lift:0 18px 38px rgba(3,5,15,.60);
  --ease:cubic-bezier(.22,.68,.32,1);
}

/* ---------- 3. base / 中文排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 84% -10%,rgba(140,91,255,.20),transparent 62%),
    radial-gradient(900px 520px at 4% 2%,rgba(53,240,224,.12),transparent 60%),
    linear-gradient(rgba(147,164,200,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(147,164,200,.045) 1px,transparent 1px);
  background-size:auto,auto,100% 72px,72px 100%;
  color:var(--text);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
#main-content{scroll-margin-top:140px;}

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

.skip-link{
  position:absolute;left:50%;top:0;z-index:200;
  transform:translate(-50%,-160%);
  padding:10px 20px;
  background:var(--cyan);color:var(--ink-900);
  font-family:var(--font-data);font-size:13px;letter-spacing:.16em;
}
.skip-link:focus{transform:translate(-50%,0);}

.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gut);}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- 4. header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(7,11,31,.985),rgba(7,11,31,.93));
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--ink-600);
  color:var(--text);
}
.site-header::before{
  content:"";display:block;height:3px;
  background:linear-gradient(90deg,var(--cyan) 0 30%,var(--violet) 30% 54%,var(--amber) 54% 62%,transparent 62%);
}
.site-header[data-scrolled="true"]{box-shadow:0 16px 36px rgba(3,5,15,.66);}

.masthead{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:14px 18px;
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(14px,2vw,20px) var(--gut) 10px;
}
.masthead__side{display:flex;align-items:center;gap:12px;min-width:0;}
.masthead__side--start{justify-self:start;}
.masthead__side--end{justify-self:end;}
.masthead__brand{justify-self:center;min-width:0;display:flex;justify-content:center;}

.brand{display:inline-flex;align-items:center;gap:14px;min-width:0;text-align:left;}
.brand__mark{
  flex:none;display:grid;place-items:center;
  width:46px;height:46px;
  background:linear-gradient(135deg,var(--cyan),var(--violet) 62%,var(--amber));
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  color:var(--ink-900);
  font-family:var(--font-data);font-size:15px;font-weight:700;letter-spacing:.04em;
}
.brand__text{display:block;min-width:0;}
.brand__name{display:block;font-size:clamp(1.3rem,2.4vw,1.95rem);font-weight:600;letter-spacing:.06em;line-height:1.16;}
.brand__line{display:block;font-family:var(--font-data);font-size:12px;letter-spacing:.18em;color:var(--mist);text-transform:uppercase;}

.version-toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 14px;
  border:var(--edge-violet);
  background:rgba(140,91,255,.10);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.version-toggle:hover{background:rgba(140,91,255,.20);border-color:rgba(140,91,255,.72);}
.version-toggle__num{font-family:var(--font-data);font-size:16px;letter-spacing:.04em;color:var(--violet);}
.version-toggle__meta{font-size:12px;letter-spacing:.14em;color:var(--mist);}

.version-panel{
  position:absolute;left:50%;top:calc(100% - 2px);z-index:90;
  transform:translateX(-50%);
  width:min(660px,calc(100vw - 32px));
  padding:22px 24px;
  background:var(--ink-700);
  border:var(--edge-violet);
  box-shadow:var(--shadow-paper);
}
.version-panel__title{
  font-family:var(--font-data);font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:16px;
}
.version-panel__list{display:grid;gap:14px;}
.version-panel__item{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:baseline;}
.version-panel__tag{
  padding:2px 9px;border:1px solid rgba(255,138,61,.5);
  font-family:var(--font-data);font-size:11px;letter-spacing:.14em;color:var(--amber);
}
.version-panel__text{font-size:14px;line-height:1.65;color:var(--mist);}

.search-field{display:flex;align-items:center;gap:10px;min-width:0;}
.search-field__label{font-family:var(--font-data);font-size:11px;letter-spacing:.2em;color:var(--mist);}
.search-field__input{
  width:min(22vw,210px);
  padding:9px 12px;
  background:rgba(3,5,15,.62);
  border:1px solid rgba(147,164,200,.24);
  color:var(--frost);font-size:14px;letter-spacing:.04em;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.search-field__input::placeholder{color:rgba(147,164,200,.7);}
.search-field__input:focus-visible{border-color:var(--cyan);background:rgba(3,5,15,.9);}
.search-field__key{
  font-family:var(--font-data);font-size:11px;letter-spacing:.12em;color:var(--amber);
  white-space:nowrap;
}

.site-nav{
  position:relative;
  display:flex;align-items:center;justify-content:center;gap:16px;
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding:0 var(--gut);
  border-top:1px solid rgba(147,164,200,.12);
}
.site-nav__list{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:clamp(6px,2vw,26px);}
.nav-link{
  display:inline-block;padding:13px 4px;
  font-size:14px;letter-spacing:.14em;color:var(--mist);
  border-bottom:2px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.nav-link:hover{color:var(--frost);border-bottom-color:var(--violet);}
.nav-link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--cyan);}

.nav-toggle{
  display:none;align-items:center;gap:12px;
  padding:14px 2px;
  font-family:var(--font-data);font-size:12px;letter-spacing:.16em;color:var(--frost);
}
.nav-toggle__bars{display:block;width:22px;height:2px;background:currentColor;box-shadow:0 -7px 0 currentColor,0 7px 0 currentColor;}
.nav-toggle[aria-expanded="true"]{color:var(--cyan);}

.region-index{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding:10px var(--gut) 12px;
  border-top:1px solid rgba(147,164,200,.10);
}
.region-index__label{font-family:var(--font-data);font-size:11px;letter-spacing:.2em;color:var(--mist);}
.region-index__list{display:flex;flex-wrap:wrap;gap:8px;}
.region-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;
  border:1px solid rgba(147,164,200,.20);
  background:rgba(14,22,51,.72);
  color:var(--mist);font-size:13px;letter-spacing:.06em;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.region-chip__code{font-family:var(--font-data);font-size:11px;letter-spacing:.08em;color:var(--violet);}
.region-chip:hover{color:var(--frost);border-color:rgba(53,240,224,.42);}
.region-chip[aria-pressed="true"]{background:rgba(53,240,224,.14);border-color:var(--cyan);color:var(--cyan);}
.region-chip[aria-pressed="true"] .region-chip__code{color:var(--amber);}

.scroll-progress{
  position:absolute;left:0;bottom:-1px;height:2px;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 68%,var(--amber));
  transition:width .12s linear;
}

/* ---------- 5. footer ---------- */
.site-footer{
  position:relative;
  margin-top:var(--stack);
  background:linear-gradient(180deg,var(--ink-700) 0%,var(--ink-900) 80%);
  border-top:1px solid var(--ink-600);
}
.site-footer::before{
  content:"";position:absolute;left:0;top:-1px;width:min(38%,420px);height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
}
.footer-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,2.1fr) minmax(0,1fr);
  gap:clamp(24px,4vw,54px);
  padding-block:clamp(36px,5vw,64px) clamp(20px,3vw,34px);
}
.footer-brand__mark{
  display:grid;place-items:center;
  width:40px;height:40px;margin-bottom:14px;
  background:linear-gradient(135deg,var(--cyan),var(--violet) 60%,var(--amber));
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  color:var(--ink-900);font-family:var(--font-data);font-size:13px;font-weight:700;
}
.footer-brand__name{font-size:1.3rem;font-weight:600;letter-spacing:.06em;}
.footer-brand__line{font-family:var(--font-data);font-size:12px;letter-spacing:.14em;color:var(--mist);margin-top:4px;}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,32px);}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-data);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);
}
.footer-col__list{display:grid;gap:2px;}
.footer-link{
  display:inline-block;padding:6px 0;
  font-size:15px;color:var(--frost);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(4px);}

.footer-contact__list{display:grid;gap:10px;}
.footer-contact__item{font-size:14px;color:var(--mist);line-height:1.6;word-break:break-word;}
.footer-contact__key{
  display:inline-block;margin-right:8px;
  font-family:var(--font-data);font-size:11px;letter-spacing:.16em;color:var(--amber);
}

.footer-service{
  padding-block:18px;
  border-top:1px solid rgba(147,164,200,.14);
  color:var(--mist);font-size:14px;line-height:1.7;
  max-width:88ch;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;justify-content:space-between;
  padding-block:16px 28px;
  border-top:1px solid rgba(147,164,200,.14);
  font-family:var(--font-data);font-size:12px;letter-spacing:.1em;color:var(--mist);
}
.footer-legal{color:var(--mist);}
.footer-copy{color:var(--frost);}

/* ---------- 6. 通用排版组件 ---------- */
.section{padding-block:var(--stack);}
.section--tint{
  background:linear-gradient(180deg,rgba(14,22,51,.92),rgba(7,11,31,0));
  border-block:1px solid var(--ink-600);
}
.section--slant{clip-path:polygon(0 0,100% 2.6%,100% 100%,0 97.4%);}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,28px);}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}

.display-title{
  font-size:clamp(2.6rem,7vw,6rem);
  font-weight:300;line-height:1.02;letter-spacing:-.02em;
}
.index-label{
  font-family:var(--font-data);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--mist);
}
.index-label::before{content:"[";color:var(--violet);}
.index-label::after{content:"]";color:var(--violet);}
.eyebrow{
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);
  font-family:var(--font-data);
}
.data-num{font-family:var(--font-data);letter-spacing:.02em;font-variant-numeric:tabular-nums;}

.section-head{display:grid;gap:10px;margin-bottom:clamp(20px,3vw,34px);}
.section-head__title{font-size:clamp(1.6rem,3.4vw,2.6rem);font-weight:400;line-height:1.2;letter-spacing:-.01em;}
.section-head__note{max-width:62ch;color:var(--mist);font-size:15px;}

.divider-slant{
  height:2px;margin-block:clamp(28px,4vw,52px);
  background:linear-gradient(90deg,transparent,rgba(140,91,255,.6) 45%,rgba(53,240,224,.5) 70%,transparent);
}

/* ---------- 7. 标签 / 按钮 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid currentColor;
  font-family:var(--font-data);font-size:11px;letter-spacing:.14em;
}
.tag--cyan{color:var(--cyan);background:rgba(53,240,224,.10);}
.tag--violet{color:var(--violet);background:rgba(140,91,255,.12);}
.tag--amber{color:var(--amber);background:rgba(255,138,61,.10);}
.tag--mint{color:var(--mint);background:rgba(92,225,160,.10);}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 24px;
  font-size:14px;letter-spacing:.12em;
  border:1px solid transparent;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
}
.btn--primary{background:var(--cyan);color:var(--ink-900);}
.btn--primary:hover{background:var(--frost);}
.btn--ghost{border-color:rgba(53,240,224,.5);color:var(--cyan);}
.btn--ghost:hover{background:rgba(53,240,224,.12);color:var(--frost);}
.btn--violet{background:var(--violet);color:var(--frost);}
.btn--violet:hover{background:#a075ff;}

/* ---------- 8. 纸层卡片 ---------- */
.paper-card{
  position:relative;
  padding:clamp(20px,3vw,32px);
  background:var(--surface);
  border:var(--edge);
  box-shadow:var(--shadow-paper);
}
.paper-card--stack{
  box-shadow:6px 6px 0 rgba(140,91,255,.26),14px 16px 0 rgba(3,5,15,.82);
}
.paper-card__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px;
  padding-bottom:14px;margin-bottom:18px;
  border-bottom:1px solid rgba(147,164,200,.16);
}
.paper-card__title{font-size:1.1rem;font-weight:500;letter-spacing:.02em;}

/* ---------- 9. 正文 / 面包屑 ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.75;color:#D8E2F7;}
.prose p + p{margin-top:1.1em;}
.prose h2{font-size:clamp(1.35rem,2.4vw,1.85rem);font-weight:500;margin:1.9em 0 .6em;letter-spacing:.01em;}
.prose h3{font-size:1.15rem;font-weight:500;margin:1.5em 0 .5em;color:var(--frost);}
.prose ul{display:grid;gap:.5em;margin:1em 0;}
.prose li{padding-left:1.3em;position:relative;}
.prose li::before{content:"—";position:absolute;left:0;color:var(--violet);}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(53,240,224,.35);}
.prose a:hover{border-bottom-color:var(--cyan);}
.prose blockquote{
  margin:1.4em 0;padding-left:18px;
  border-left:2px solid var(--violet);
  color:var(--mist);
}

.breadcrumb{
  padding-top:clamp(20px,3vw,32px);
  font-family:var(--font-data);font-size:12px;letter-spacing:.14em;
  color:var(--mist);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.breadcrumb__item{display:inline-flex;align-items:center;gap:10px;}
.breadcrumb__link{color:var(--mist);transition:color .2s var(--ease);}
.breadcrumb__link:hover{color:var(--cyan);}
.breadcrumb__sep{color:var(--ink-600);}
.breadcrumb__current{color:var(--frost);}

/* ---------- 10. 数据可视化基础件 ---------- */
.meter{display:grid;gap:8px;}
.meter__track{
  position:relative;height:10px;
  background:rgba(28,39,72,.85);
  border:1px solid rgba(147,164,200,.18);
  overflow:hidden;
}
.meter__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transition:width .9s var(--ease);
}
.meter__value{font-family:var(--font-data);font-size:12px;letter-spacing:.06em;color:var(--amber);}

.legend{display:flex;flex-wrap:wrap;gap:16px;}
.legend__item{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--mist);}
.legend__swatch{width:12px;height:12px;background:var(--cyan);flex:none;}
.legend__item:nth-child(2) .legend__swatch{background:var(--violet);}
.legend__item:nth-child(3) .legend__swatch{background:var(--amber);}
.legend__item:nth-child(4) .legend__swatch{background:var(--mint);}

.stat-tile{
  display:grid;gap:6px;
  padding:18px 20px;
  background:var(--surface);
  border:var(--edge);
}
.stat-tile__value{font-family:var(--font-data);font-size:clamp(1.6rem,3vw,2.3rem);line-height:1.1;letter-spacing:.01em;color:var(--frost);}
.stat-tile__label{font-size:13px;letter-spacing:.06em;color:var(--mist);}
.stat-tile__delta{font-family:var(--font-data);font-size:12px;letter-spacing:.08em;color:var(--amber);}

/* ---------- 11. 图片容器（页面阶段放图） ---------- */
.media-frame{
  position:relative;
  border:1px solid rgba(147,164,200,.22);
  background:linear-gradient(135deg,rgba(14,22,51,.92),rgba(28,39,72,.62));
  overflow:hidden;
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(53,240,224,.06),transparent 42%);
}
.media-frame__img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;}
.media-frame--wide .media-frame__img{aspect-ratio:21/9;}
.media-frame--tall .media-frame__img{aspect-ratio:3/4;}
.media-frame__caption{
  display:block;position:relative;z-index:1;
  padding:10px 14px;
  border-top:1px solid rgba(147,164,200,.18);
  background:rgba(7,11,31,.86);
  font-family:var(--font-data);font-size:11px;letter-spacing:.14em;color:var(--mist);
}

/* ---------- 12. 可展开内容组 ---------- */
.expander{border-top:1px solid rgba(147,164,200,.20);}
.expander:last-of-type{border-bottom:1px solid rgba(147,164,200,.20);}
.expander__summary{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:18px 0;
  cursor:pointer;list-style:none;
  font-size:16px;color:var(--frost);
  transition:color .22s var(--ease);
}
.expander__summary::-webkit-details-marker{display:none;}
.expander__summary::after{content:"+";font-family:var(--font-data);color:var(--cyan);}
.expander__summary:hover{color:var(--cyan);}
details[open] > .expander__summary::after{content:"–";}
.expander__body{max-width:68ch;padding:0 0 22px;color:var(--mist);font-size:15.5px;}

/* ---------- 13. 显现动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1100px){
  .footer-inner{grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);}
  .footer-contact{grid-column:1 / -1;}
  .footer-contact__list{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 22px;}
}

@media (max-width:960px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .span-3{grid-column:span 3;}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 6;}
}

@media (max-width:880px){
  .masthead{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:12px 14px;
  }
  .masthead__brand{order:-1;flex:1 1 100%;display:flex;justify-content:center;}
  .masthead__side--start,.masthead__side--end{flex:0 1 auto;}
  .version-toggle__meta{display:none;}
  .search-field__label{display:none;}
  .search-field__input{width:min(48vw,190px);}

  .site-nav{flex-direction:column;align-items:stretch;gap:0;}
  .nav-toggle{display:inline-flex;width:100%;justify-content:space-between;}
  .site-nav__list{
    display:none;
    width:100%;flex-direction:column;align-items:stretch;gap:0;
    max-height:min(64vh,440px);overflow:auto;
    padding-bottom:8px;
  }
  .site-nav[data-open="true"] .site-nav__list{display:flex;}
  .site-nav__item{border-bottom:1px solid rgba(147,164,200,.12);}
  .nav-link{
    display:block;padding:15px 6px;
    font-size:15px;
    border-bottom:0;border-left:2px solid transparent;
  }
  .nav-link[aria-current="page"]{border-left-color:var(--cyan);padding-left:14px;border-bottom-color:transparent;}

  .version-panel{top:auto;left:var(--gut);right:var(--gut);transform:none;width:auto;}
}

@media (max-width:640px){
  .grid-12{grid-template-columns:1fr;}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:auto;}
  .region-index{gap:10px;}
  .region-index__list{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;}
  .region-chip{flex:0 0 auto;}
  .footer-inner{grid-template-columns:1fr;}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-contact{grid-column:auto;}
  .footer-contact__list{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .section--slant{clip-path:none;}
  .display-title{letter-spacing:-.01em;}
}

/* ---------- 15. 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
  .meter__bar{transition:none;}
  .scroll-progress{transition:none;}
}