/* =========================================================
   百博赛场 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 01 Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,figcaption,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

/* ---------- 02 变量 ---------- */
:root{
  --ink:#081C16;
  --pitch:#0F2E26;
  --grid:#1B4A3C;
  --cyan:#45F2CE;
  --mist:#B6FFF1;
  --orange:#FF8B3D;
  --paper:#F3F8F5;
  --fog:#93AFA5;
  --black:#030907;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-num:"Barlow Condensed","Oswald","DIN Alternate","Arial Narrow",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --r-sm:10px;
  --r-md:18px;
  --r-lg:26px;
  --r-pill:999px;

  --line:rgba(27,74,60,.9);
  --line-soft:rgba(147,175,165,.2);
  --line-cyan:rgba(69,242,206,.28);

  --wide:1240px;
  --gutter:clamp(16px,4vw,40px);
  --sp:clamp(20px,3vw,36px);
  --ease:cubic-bezier(.2,.8,.2,1);
}

/* ---------- 03 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(1200px 620px at 50% -8%,rgba(69,242,206,.10),transparent 72%),
    linear-gradient(rgba(27,74,60,.42) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,74,60,.42) 1px,transparent 1px);
  background-size:auto,88px 88px,88px 88px;
  background-position:center top,center top,center top;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
}
body.is-nav-open{overflow:hidden}
#main-content{display:block}
#main-content:focus{outline:none}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.16;letter-spacing:-.01em;color:var(--paper)}
h1{font-size:clamp(30px,4.6vw,54px);font-weight:900;letter-spacing:-.02em}
h2{font-size:clamp(23px,3vw,34px)}
h3{font-size:clamp(18px,2vw,22px)}
h4{font-size:16px}
p{max-width:46em}
strong{font-weight:700;color:var(--paper)}
::selection{background:var(--cyan);color:#04150F}

.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.01em}
.mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--fog)}

/* ---------- 04 布局 ---------- */
.container{width:min(var(--wide),calc(100% - var(--gutter) * 2));margin-inline:auto}
.container--narrow{width:min(820px,calc(100% - var(--gutter) * 2));margin-inline:auto}
.section{padding-block:clamp(40px,6vw,80px)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:clamp(20px,3vw,32px)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan)}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--cyan);opacity:.7}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--line-cyan),rgba(27,74,60,0));margin-block:clamp(20px,3vw,32px)}

.grid{display:grid;gap:var(--gap,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(0,1fr) minmax(260px,320px);gap:clamp(20px,3vw,40px)}

/* ---------- 05 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-pill);
  font-family:var(--font-body);font-weight:700;font-size:14px;letter-spacing:.04em;
  border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn--signal{background:var(--cyan);color:#04150F}
.btn--signal:hover{background:var(--mist);transform:translateY(-1px)}
.btn--ghost{border-color:var(--line-cyan);color:var(--mist);background:rgba(15,46,38,.6)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(27,74,60,.75)}
.btn--sm{padding:8px 15px;font-size:12.5px}

.panel{background:linear-gradient(160deg,rgba(15,46,38,.95),rgba(8,28,22,.95));border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(18px,2.4vw,30px)}
.card{position:relative;background:rgba(15,46,38,.72);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(16px,2vw,26px);transition:border-color .24s var(--ease),background .24s var(--ease),transform .24s var(--ease)}
.card:hover{border-color:var(--line-cyan);background:rgba(27,74,60,.7);transform:translateY(-2px)}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:var(--r-pill);border:1px solid var(--line-cyan);font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist);text-transform:uppercase}
.tag--warn{border-color:rgba(255,139,61,.5);color:var(--orange)}

.stat{display:grid;gap:2px}
.stat__num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-weight:600;font-size:clamp(34px,5vw,56px);line-height:1;color:var(--cyan);letter-spacing:-.01em}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--fog);padding-block:14px 0}
.breadcrumb a{color:rgba(243,248,245,.7);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--grid)}
.breadcrumb [aria-current="page"]{color:var(--mist)}

.prose{max-width:44em;font-size:16.5px;line-height:1.85;color:rgba(243,248,245,.86)}
.prose h2{margin-block:1.6em .6em}
.prose h3{margin-block:1.4em .5em;color:var(--mist)}
.prose p{margin-bottom:1.1em}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(69,242,206,.4)}
.prose a:hover{color:var(--mist);border-color:var(--mist)}
.prose ul,.prose ol{list-style:disc;padding-left:1.4em;margin-bottom:1.1em}
.prose li{margin-bottom:.4em}
.prose blockquote{border-left:2px solid var(--cyan);padding-left:16px;color:var(--fog);margin-block:1.4em}

/* 图片容器基础规则 */
.media{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(150deg,#0F2E26,#081C16);aspect-ratio:16/10;margin:0}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__tag{position:absolute;top:12px;left:12px;z-index:2}
.media__caption{margin-top:10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--fog)}

/* 显现 */
.js-reveal [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 06 跳转链接与进度条 ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 18px;border-radius:var(--r-pill);
  background:var(--cyan);color:#04150F;font-weight:800;font-size:14px;
  transform:translateY(-180%);transition:transform .22s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

.scroll-progress{position:fixed;inset:0 0 auto 0;height:2px;z-index:120;background:rgba(27,74,60,.55);pointer-events:none}
.scroll-progress__bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--cyan),var(--mist));transition:transform .1s linear}

/* ---------- 07 头部 ---------- */
.site-header{
  position:relative;z-index:60;
  background:linear-gradient(180deg,#0A241C 0%,#081C16 100%);
  border-bottom:1px solid var(--line-cyan);
}
.header-shell{width:min(var(--wide),calc(100% - var(--gutter) * 2));margin-inline:auto}

.topline{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-block:9px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--fog);
  border-bottom:1px solid rgba(27,74,60,.7);
}
.topline__cell{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topline__cell--mid{display:inline-flex;align-items:center;gap:8px;color:var(--mist)}
.topline__cell--end{color:var(--fog)}
.pulse-dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 0 rgba(69,242,206,.55);
  animation:pulse 1.8s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(69,242,206,.5)}
  70%{box-shadow:0 0 0 7px rgba(69,242,206,0)}
  100%{box-shadow:0 0 0 0 rgba(69,242,206,0)}
}

.masthead{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:clamp(12px,2vw,32px);
  padding-block:18px 20px;
}
.masthead__col{min-width:0}
.masthead__col--start{justify-self:start;position:relative}
.masthead__col--brand{justify-self:center;text-align:center}
.masthead__col--end{justify-self:end;display:flex;align-items:center;gap:10px}

/* 品牌报头 */
.brand{
  display:inline-grid;
  grid-template-columns:auto 1fr;
  grid-template-areas:"glyph name" "glyph meta";
  align-items:center;column-gap:12px;row-gap:1px;text-align:left;
}
.brand__glyph{
  grid-area:glyph;position:relative;
  width:36px;height:36px;border-radius:12px;
  border:1px solid rgba(69,242,206,.55);
  background:radial-gradient(circle at 30% 20%,rgba(69,242,206,.22),rgba(15,46,38,.9));
}
.brand__glyph::before{content:"";position:absolute;inset:9px 6px;border-left:1px solid rgba(69,242,206,.65);border-right:1px solid rgba(69,242,206,.65)}
.brand__glyph::after{content:"";position:absolute;left:50%;top:50%;width:9px;height:9px;transform:translate(-50%,-50%);border:1px solid var(--cyan);border-radius:50%}
.brand__glyph--lg{width:52px;height:52px;border-radius:16px}
.brand__glyph--lg::before{inset:13px 9px}
.brand__glyph--lg::after{width:13px;height:13px}
.brand__name{
  grid-area:name;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(21px,2.4vw,30px);line-height:1.08;letter-spacing:.16em;
  color:var(--paper);
}
.brand__meta{
  grid-area:meta;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;color:var(--fog);
}

/* 赛事切换器 */
.event-switch{position:relative}
.event-switch__button{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--r-pill);
  border:1px solid var(--line-cyan);background:rgba(15,46,38,.82);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--mist);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.event-switch__button:hover{border-color:var(--cyan);background:rgba(27,74,60,.9)}
.event-switch__key{color:var(--fog)}
.event-switch__value{font-family:var(--font-body);font-weight:700;font-size:12.5px;letter-spacing:.02em;color:var(--paper)}
.event-switch__caret{
  width:6px;height:6px;border-right:1.5px solid var(--cyan);border-bottom:1.5px solid var(--cyan);
  transform:rotate(45deg) translateY(-1px);
  transition:transform .24s var(--ease);
}
.event-switch__button[aria-expanded="true"] .event-switch__caret{transform:rotate(-135deg) translateY(-1px)}

.event-panel{
  position:absolute;top:calc(100% + 10px);left:0;z-index:90;
  width:min(330px,calc(100vw - 32px));
  padding:14px;
  background:#0B2A22;border:1px solid var(--line-cyan);border-radius:var(--r-md);
  box-shadow:0 26px 60px rgba(3,9,7,.66);
}
.event-panel[hidden]{display:none}
.event-panel__title{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--fog)}
.event-panel__grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.chip{
  padding:6px 13px;border-radius:var(--r-pill);
  border:1px solid rgba(147,175,165,.32);background:rgba(8,28,22,.6);
  font-size:12.5px;font-weight:600;color:var(--fog);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.chip:hover{color:var(--mist);border-color:var(--line-cyan)}
.chip[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:#04150F;font-weight:800}

/* 次级链接与移动按钮 */
.ghost-link{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--fog);
  padding:8px 4px;border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.ghost-link:hover{color:var(--cyan);border-bottom-color:var(--line-cyan)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 15px;border-radius:var(--r-pill);
  border:1px solid var(--line-cyan);background:rgba(15,46,38,.8);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--mist);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:3.5px;width:14px}
.nav-toggle__bars i{display:block;height:1.5px;border-radius:2px;background:var(--cyan);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 目录导航 */
.site-nav{
  display:flex;align-items:center;gap:clamp(10px,2vw,26px);
  border-top:1px solid var(--line);
  padding-block:5px 7px;
}
.site-nav__label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;color:var(--fog);white-space:nowrap}
.site-nav__list{display:flex;flex:1;justify-content:center;flex-wrap:wrap;gap:clamp(2px,1.2vw,8px)}
.site-nav__list a{
  display:inline-block;padding:9px 15px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;letter-spacing:.05em;color:rgba(243,248,245,.78);
  transition:color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.site-nav__list a:hover{color:var(--cyan);background:rgba(69,242,206,.08)}
.site-nav__list a[aria-current="page"]{
  color:var(--cyan);background:rgba(69,242,206,.12);
  box-shadow:inset 0 0 0 1px rgba(69,242,206,.38);
  font-weight:800;
}
.site-nav__count{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:13px;letter-spacing:.12em;color:var(--grid)}

.nav-scrim{display:none}

/* ---------- 08 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:var(--black);
  color:var(--fog);
  border-top:1px solid rgba(69,242,206,.22);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(69,242,206,.6),transparent);
}
.footer-shell{width:min(var(--wide),calc(100% - var(--gutter) * 2));margin-inline:auto;padding-block:clamp(36px,5vw,60px) 24px}

.footer-top{display:grid;grid-template-columns:1.05fr 2fr 1.25fr;gap:clamp(24px,4vw,56px)}
.footer-brand{display:grid;gap:10px;align-content:start}
.footer-brand__name{font-family:var(--font-display);font-weight:900;font-size:22px;letter-spacing:.14em;color:var(--paper)}
.footer-brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--fog)}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,32px)}
.footer-col__title{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);font-weight:600;margin-bottom:14px;
}
.footer-col ul{display:grid;gap:9px}
.footer-col a{
  font-size:13.5px;color:rgba(243,248,245,.74);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-col a:hover{color:var(--cyan);padding-left:4px}

.footer-contact{display:grid;gap:12px;align-content:start}
.contact-list{display:grid;gap:10px}
.contact-list__item{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px}
.contact-list__item--stack{display:grid;gap:2px}
.contact-list__key{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;color:var(--fog);min-width:32px}
.contact-list__value{font-size:13.5px;color:var(--paper);word-break:break-all;font-variant-numeric:tabular-nums}
.copy-btn{
  padding:2px 9px;border-radius:var(--r-pill);
  border:1px solid var(--line-cyan);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--fog);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.copy-btn:hover{color:var(--cyan);border-color:var(--cyan)}
.copy-btn[data-state="done"]{background:var(--cyan);border-color:var(--cyan);color:#04150F;font-weight:700}
.copy-btn[data-state="fail"]{border-color:var(--orange);color:var(--orange)}
.footer-note{font-size:12px;line-height:1.7;color:rgba(147,175,165,.86);max-width:30em}

.footer-region{
  display:flex;align-items:center;gap:10px;
  margin-top:clamp(28px,4vw,44px);padding:14px 16px;
  border:1px solid rgba(27,74,60,.9);border-radius:var(--r-md);
  background:rgba(15,46,38,.5);
  font-size:12.5px;color:var(--fog);max-width:none;
}
.footer-region__dot{flex:none;width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(69,242,206,.14)}

.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 20px;
  margin-top:22px;padding-top:18px;
  border-top:1px solid rgba(27,74,60,.75);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:rgba(147,175,165,.8);
}
.footer-legal__end{color:rgba(147,175,165,.55)}

.to-top{
  position:fixed;right:16px;bottom:16px;z-index:55;
  display:inline-flex;align-items:center;gap:7px;
  padding:10px 15px;border-radius:var(--r-pill);
  border:1px solid var(--line-cyan);background:rgba(8,28,22,.92);color:var(--mist);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),border-color .2s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan);color:var(--cyan)}
.to-top__arrow{width:7px;height:7px;border-left:1.5px solid currentColor;border-top:1.5px solid currentColor;transform:rotate(45deg) translate(1px,1px)}

/* ---------- 09 响应式 ---------- */
@media (max-width:1100px){
  .site-nav__list a{padding:9px 11px;font-size:13.5px}
  .site-nav__label,.site-nav__count{display:none}
}

@media (max-width:1000px){
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:900px){
  .ghost-link,
  .masthead__col--end .btn{display:none}

  .nav-toggle{display:inline-flex}

  .masthead{
    grid-template-columns:1fr auto;
    grid-template-areas:"brand toggle" "switch switch";
    row-gap:14px;padding-block:14px 16px;
  }
  .masthead__col--brand{grid-area:brand;justify-self:start;text-align:left}
  .masthead__col--end{grid-area:toggle;justify-self:end}
  .masthead__col--start{grid-area:switch;justify-self:stretch}
  .brand__name{letter-spacing:.12em}

  .site-nav{
    position:fixed;left:12px;right:12px;bottom:12px;z-index:80;
    flex-direction:column;align-items:stretch;gap:0;
    padding:16px;min-height:0;max-height:76vh;overflow:auto;
    background:#0A241C;border:1px solid var(--line-cyan);border-radius:24px;
    box-shadow:0 -22px 70px rgba(3,9,7,.72);
    transform:translateY(calc(100% + 28px));opacity:0;visibility:hidden;
    transition:transform .24s var(--ease),opacity .24s var(--ease),visibility .24s var(--ease);
  }
  .site-nav[data-open]{transform:translateY(0);opacity:1;visibility:visible}
  .site-nav__label{display:block;padding-bottom:12px;border-bottom:1px solid rgba(27,74,60,.9);font-size:10.5px}
  .site-nav__count{display:none}
  .site-nav__list{
    flex:1 1 auto;flex-direction:column;justify-content:flex-start;gap:2px;margin-top:10px;width:100%;
  }
  .site-nav__list a{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 14px;border-radius:14px;font-size:16px;font-weight:700;
  }
  .site-nav__list a::after{content:"↗";font-family:var(--font-mono);font-size:12px;color:var(--grid)}
  .site-nav__list a[aria-current="page"]::after{color:var(--cyan)}

  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:70;border:0;
    background:rgba(3,9,7,.66);
    opacity:0;visibility:hidden;
    transition:opacity .24s var(--ease),visibility .24s var(--ease);
  }
  .nav-scrim[data-open]{opacity:1;visibility:visible}

  .to-top{right:14px;bottom:calc(14px + env(safe-area-inset-bottom))}
  .header-shell{padding-bottom:2px}
}

@media (max-width:720px){
  .grid--2{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-contact{grid-column:auto}
  .footer-legal{font-size:10.5px;letter-spacing:.06em}
  .footer-legal__end{display:none}
}

@media (max-width:620px){
  .topline__cell--mid{display:none}
  .topline__cell{font-size:10px;letter-spacing:.12em}
  .brand__meta{font-size:9px;letter-spacing:.16em}
  .brand__glyph{width:30px;height:30px;border-radius:10px}
  .brand__glyph::before{inset:7px 5px}
  .brand__glyph::after{width:7px;height:7px}
  .event-switch__button{width:100%;justify-content:space-between}
  .event-panel{width:calc(100vw - var(--gutter) * 2)}
  .btn--sm{padding:7px 12px;font-size:12px}
}

/* ---------- 10 可访问性与动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .pulse-dot{animation:none;box-shadow:0 0 0 4px rgba(69,242,206,.16)}
  .js-reveal [data-reveal]{opacity:1 !important;transform:none !important}
  .scroll-progress__bar{transition:none}
}