/* =========================================================
   开云竞猜站 · 共享 Site Kit  /assets/site.css
   深夜战术板：轮次轴 + 居中刊头 + 纸层数据卡
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root{
  --ink:#0A1330;
  --charcoal:#121417;
  --night:#1B2A52;
  --cyan:#2FF0D6;
  --cyan-soft:#9FF6EA;
  --orange:#FF7A33;
  --orange-soft:#FFC39A;
  --paper:#F5F1E8;
  --text:#C9CEDB;
  --text-dim:#8B94AC;
  --text-dark:#16181D;
  --stroke:#2C3350;
  --rail:112px;
  --shell:1280px;
  --gutter:clamp(18px,4vw,40px);
  --gap:24px;
  --shadow-layer:6px 6px 0 rgba(0,0,0,.38);
  --font-body:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-left:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg,
    rgba(44,51,80,.55) 0 1px,
    transparent 1px 96px);
  opacity:.35;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
#main-content{display:block;position:relative;z-index:1}
#main-content [id]{scroll-margin-top:148px}

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

/* ---------- 3. 通用容器 / 展区 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.shell--narrow{max-width:860px}
.zone{padding:clamp(44px,7vw,96px) 0;border-top:1px solid var(--stroke)}
.zone:first-child{border-top:0}
.zone__head{display:flex;align-items:baseline;flex-wrap:wrap;gap:14px;margin-bottom:clamp(22px,3vw,36px)}
.zone__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--cyan);font-variant-numeric:tabular-nums}
.zone__label{font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--text-dim)}
.zone__rule{flex:1;min-width:40px;height:1px;background:var(--stroke)}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split-8-5{display:grid;grid-template-columns:8fr 5fr;gap:clamp(22px,3vw,48px);align-items:start}
.split-5-8{display:grid;grid-template-columns:5fr 8fr;gap:clamp(22px,3vw,48px);align-items:start}

/* ---------- 4. 排版 ---------- */
.display-xl{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:90%;
  font-size:clamp(2.6rem,8.4vw,7rem);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--paper);
}
.display-l{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:90%;
  font-size:clamp(1.9rem,5vw,3.4rem);
  line-height:1.08;
  letter-spacing:-.02em;
  color:var(--paper);
}
.h-section{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(1.4rem,3vw,2.2rem);
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--paper);
}
.lede{font-size:clamp(1rem,1.5vw,1.12rem);line-height:1.8;color:var(--text);max-width:62ch}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.text-dim{color:var(--text-dim)}
.annotation{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:var(--cyan-soft);
}

/* ---------- 5. 标签 / 展签 / 按钮 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border:1px solid currentColor;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  line-height:1.4;
}
.tag--cyan{color:var(--cyan)}
.tag--orange{color:var(--orange)}
.tag--paper{color:var(--text-dark);border-color:var(--text-dark)}
.plate{
  display:inline-flex;
  align-items:center;
  padding:5px 11px;
  background:var(--paper);
  color:var(--text-dark);
  border:1px solid var(--ink);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  line-height:1.4;
}
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  font-family:var(--font-mono);
  font-size:13.5px;
  letter-spacing:.1em;
  line-height:1.2;
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
  transition:background-color .22s ease,color .22s ease,border-color .22s ease;
}
.btn--cyan{background:var(--cyan);color:var(--ink);font-weight:700}
.btn--cyan:hover{background:var(--cyan-soft)}
.btn--orange{background:var(--orange);color:#200F04;font-weight:700}
.btn--orange:hover{background:var(--orange-soft)}
.btn--ghost{border-color:var(--stroke);color:var(--text)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

.split-line{height:2px;border:0;margin:0;background:linear-gradient(90deg,var(--cyan) 0%,var(--cyan-soft) 38%,rgba(44,51,80,0) 50%,var(--orange-soft) 62%,var(--orange) 100%)}

/* ---------- 6. 卡片 / 数据卡 ---------- */
.card{
  position:relative;
  padding:22px;
  background:linear-gradient(165deg,rgba(27,42,82,.72),rgba(18,20,23,.94));
  border:1px solid var(--stroke);
  box-shadow:var(--shadow-layer);
}
.card__tag{
  display:inline-block;
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--cyan-soft);
}
.card__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:auto;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
  color:var(--cyan);
}
.card__link::after{content:"→";transition:transform .2s ease}
.card__link:hover::after{transform:translateX(4px)}
.slant-card{clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);box-shadow:none}

.data-card{display:flex;flex-direction:column;gap:12px;min-height:180px}
.data-card__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(2rem,4vw,3rem);
  line-height:1;
  color:var(--cyan);
}
.data-card__value--warm{color:var(--orange)}
.data-card__desc{font-size:14px;line-height:1.7;color:var(--text-dim)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(1.5rem,3vw,2.3rem);line-height:1;color:var(--paper)}
.stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--text-dim)}

/* ---------- 7. 面包屑 / 正文 / 图片容器 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:22px 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--text-dim)}
.crumbs__item{display:inline-flex;align-items:center;gap:8px}
.crumbs__item a:hover{color:var(--cyan)}
.crumbs__sep{color:var(--stroke)}

.prose{max-width:72ch;font-size:16.5px;line-height:1.85;color:var(--text)}
.prose p+p,.prose ul+p,.prose p+ul{margin-top:1em}
.prose h2{font-family:var(--font-display);font-size:1.45rem;font-weight:800;color:var(--paper);margin:1.8em 0 .6em;line-height:1.3}
.prose h3{font-size:1.1rem;font-weight:700;color:var(--paper);margin:1.5em 0 .5em}
.prose ul{list-style:none}
.prose li{position:relative;padding-left:20px;margin-top:.55em}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--cyan)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(47,240,214,.45)}
.prose--paper{
  background:var(--paper);
  color:var(--text-dark);
  border:1px solid var(--stroke);
  padding:clamp(20px,4vw,44px);
}
.prose--paper h2,.prose--paper h3{color:var(--text-dark)}
.prose--paper a{color:#0C5F57;border-bottom-color:rgba(12,95,87,.5)}
.prose--paper li::before{background:var(--orange)}

.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--stroke);
  background:linear-gradient(135deg,rgba(27,42,82,.85),rgba(10,19,48,.92));
}
.media img{width:100%;height:100%;object-fit:cover}
.media--3-2{aspect-ratio:3/2}
.media--16-9{aspect-ratio:16/9}
.media--1-1{aspect-ratio:1/1}
.media--placeholder::after{
  content:attr(data-label);
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--stroke);
}
.media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 12px;
  background:linear-gradient(0deg,rgba(10,19,48,.94),rgba(10,19,48,0));
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--cyan-soft);
}

/* ---------- 8. Skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  padding:10px 16px;
  background:var(--paper);
  color:var(--text-dark);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 9. 左侧轮次轴 ---------- */
.round-rail{display:none}
.round-rail{
  position:fixed;
  top:0;left:0;
  width:var(--rail);
  height:100vh;
  z-index:80;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:24px 0 28px;
  background:var(--charcoal);
  border-right:1px solid var(--stroke);
}
.round-rail__label{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.42em;
  color:var(--text-dim);
}
.round-rail__ticks{position:relative;display:flex;flex-direction:column;align-items:center;gap:24px}
.round-rail__ticks::before{content:"";position:absolute;top:0;bottom:0;width:1px;background:var(--stroke)}
.round-rail__tick{
  position:relative;
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--text-dim);
  transition:color .3s ease;
}
.round-rail__tick::before{content:"";width:12px;height:1px;background:currentColor;transition:width .3s ease,background-color .3s ease}
.round-rail__tick.is-active{color:var(--cyan)}
.round-rail__tick.is-active::before{width:24px;background:var(--cyan);box-shadow:0 0 10px rgba(47,240,214,.75)}
.round-rail__foot{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.3em;
  color:var(--text-dim);
}

/* ---------- 10. 刊头 Masthead ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:70;
  --progress:0;
  background:rgba(10,19,48,.93);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--stroke);
}
.masthead__progress{
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-soft) 42%,var(--orange));
}
.masthead__inner{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:16px var(--gutter) 0;
}
.masthead__top{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  padding-bottom:14px;
}
.masthead__plate{
  justify-self:start;
  transition:opacity .25s ease,visibility .25s ease;
}
.masthead__tools{justify-self:end;display:flex;align-items:center;gap:14px}

.brand{display:inline-flex;align-items:center;gap:12px;justify-self:center}
.brand__mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  background:linear-gradient(135deg,var(--cyan),var(--orange));
  color:var(--ink);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:.04em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
}
.brand__text{display:block;text-align:left}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  letter-spacing:.06em;
  line-height:1.3;
  color:var(--paper);
}
.brand__line{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.4;
  color:var(--text-dim);
}

.channel-entry{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 17px;
  background:linear-gradient(90deg,rgba(255,122,51,.18),rgba(47,240,214,.16));
  border:1px solid var(--orange);
  color:var(--paper);
  font-size:13px;
  letter-spacing:.08em;
  line-height:1.3;
  clip-path:polygon(0 0,100% 0,calc(100% - 14px) 100%,0 100%);
  transition:background-color .22s ease,color .22s ease;
}
.channel-entry:hover{background:var(--orange);color:#200F04}
.channel-entry__label{white-space:nowrap}
.channel-entry__ver{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--cyan)}
.channel-entry:hover .channel-entry__ver{color:#200F04}

.nav-toggle{display:none;align-items:center;gap:9px;padding:8px 12px;border:1px solid var(--stroke);color:var(--text);font-size:12px;letter-spacing:.16em;line-height:1.3}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bar{display:block;height:1.5px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open .nav-toggle__bar:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle.is-open .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle.is-open .nav-toggle__bar:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}

.mainnav{padding-bottom:12px}
.mainnav__list{display:flex;justify-content:center;gap:clamp(14px,3vw,46px)}
.mainnav__link{
  position:relative;
  display:inline-block;
  padding:10px 2px 13px;
  font-size:14px;
  letter-spacing:.14em;
  color:var(--text);
  transition:color .2s ease;
}
.mainnav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:7px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s ease;
}
.mainnav__link:hover{color:var(--paper)}
.mainnav__link:hover::after{transform:scaleX(1)}
.mainnav__link[aria-current="page"]{color:var(--cyan)}
.mainnav__link[aria-current="page"]::after{transform:scaleX(1)}

/* 数据带 */
.ticker{
  display:flex;
  align-items:center;
  height:34px;
  overflow:hidden;
  border-top:1px solid var(--stroke);
  background:linear-gradient(90deg,rgba(47,240,214,.09),rgba(255,122,51,.09));
  transition:height .3s ease,opacity .3s ease;
}
.ticker__track{display:flex;width:max-content;animation:ticker-scroll 38s linear infinite}
.ticker__group{display:flex;align-items:center;gap:34px;padding-right:34px;white-space:nowrap}
.ticker__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--orange-soft)}
.ticker__item{font-size:12.5px;letter-spacing:.08em;color:var(--text)}
.ticker__num{margin-left:7px;font-weight:400;color:var(--cyan)}
@keyframes ticker-scroll{from{transform:translate3d(0,0,0)}to{transform:translate3d(-50%,0,0)}}

.masthead.is-condensed .masthead__plate{opacity:0;visibility:hidden}
.masthead.is-condensed .masthead__inner{padding-top:11px}
.masthead.is-condensed .masthead__top{padding-bottom:10px}
.masthead.is-condensed .mainnav{padding-bottom:6px}
.masthead.is-condensed .mainnav__link{padding:8px 2px 10px}
.masthead.is-condensed .ticker{height:0;opacity:0;border-top-color:transparent}

/* ---------- 11. 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:22px;
  bottom:22px;
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  background:var(--charcoal);
  border:1px solid var(--stroke);
  border-left:3px solid var(--cyan);
  color:var(--text-dim);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,color .2s ease,border-color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--cyan);border-color:var(--cyan)}
.to-top__num{color:var(--cyan)}

/* ---------- 12. 页脚 ---------- */
.sitefoot{
  position:relative;
  margin-top:clamp(40px,7vw,96px);
  background:var(--charcoal);
  border-top:1px solid var(--stroke);
  overflow:hidden;
}
.sitefoot::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg,
    rgba(44,51,80,.55) 0 1px,
    transparent 1px 96px);
  opacity:.55;
}
.sitefoot__inner{
  position:relative;
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(40px,6vw,76px) var(--gutter) 28px;
}
.sitefoot__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:20px;
  padding-bottom:24px;
  border-bottom:1px solid var(--stroke);
}
.sitefoot__wordmark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2rem,6vw,3.6rem);
  line-height:1;
  letter-spacing:.02em;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--paper) 52%,var(--orange) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.sitefoot__tagline{margin-top:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--text-dim)}
.sitefoot__meta{display:flex;flex-wrap:wrap;gap:10px}

.sitefoot__grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(130px,1fr)) 1.5fr;
  gap:clamp(22px,3vw,44px);
  padding:34px 0;
  border-bottom:1px solid var(--stroke);
}
.sitefoot__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--text-dim);
}
.sitefoot__links{display:flex;flex-direction:column;gap:10px}
.sitefoot__link{
  display:inline-block;
  padding-bottom:2px;
  font-size:14px;
  color:var(--text);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.sitefoot__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

.contact-row{display:flex;align-items:baseline;gap:12px;margin-bottom:10px}
.contact-row__key{
  flex:0 0 54px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--cyan-soft);
}
.contact-row__val{font-size:13.5px;line-height:1.6;color:var(--text);word-break:break-word}
.sitefoot__note{font-size:12.5px;line-height:1.75;color:var(--text-dim)}

.sitefoot__bottom{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:14px;
  padding-top:22px;
}
.sitefoot__legal{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--text-dim);
}

/* ---------- 13. 进入视口 ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-in{opacity:1;transform:translateY(0)}

/* ---------- 14. 响应式 ---------- */
@media (min-width:1101px){
  body{padding-left:var(--rail)}
  .round-rail{display:flex}
}

@media (max-width:1100px){
  .round-rail{display:none}
  body{padding-left:0}
}

@media (max-width:900px){
  .masthead__top{grid-template-columns:auto 1fr;gap:12px}
  .masthead__plate{display:none}
  .brand{justify-self:start}
  .brand__line{display:none}
  .brand__mark{width:34px;height:34px;font-size:12px}
  .brand__name{font-size:17px}
  .masthead__tools{justify-self:end;gap:10px}
  .channel-entry{padding:8px 12px;font-size:12px}
  .nav-toggle{display:inline-flex}

  .mainnav{
    position:absolute;
    top:100%;
    left:0;right:0;
    padding:8px var(--gutter) 20px;
    background:var(--charcoal);
    border-bottom:1px solid var(--stroke);
    max-height:calc(100vh - 96px);
    overflow:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .mainnav[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}
  .mainnav__list{flex-direction:column;gap:0;justify-content:flex-start}
  .mainnav__link{display:block;padding:15px 0;font-size:16px;border-bottom:1px solid var(--stroke)}
  .mainnav__link::after{display:none}
  .masthead.is-condensed .mainnav__link{padding:15px 0}

  .grid--2,.grid--3,.split-8-5,.split-5-8{grid-template-columns:1fr}
  .sitefoot__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .to-top{right:14px;bottom:14px;padding:9px 13px}
}

@media (max-width:560px){
  body{font-size:16px}
  .sitefoot__grid{grid-template-columns:1fr;gap:26px}
  .sitefoot__head{align-items:flex-start}
  .contact-row{flex-direction:column;gap:2px}
  .contact-row__key{flex:none}
  .to-top__text{display:none}
}

/* ---------- 15. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .ticker__track{animation:none;transform:none}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .masthead,.mainnav,.to-top,.mainnav__link,.mainnav__link::after,
  .card__link::after,.ticker,.brand__mark,.masthead__plate,
  .round-rail__tick,.round-rail__tick::before,.skip-link{transition:none}
}