/* =========================================================
   星空赛场 · 共享样式 /assets/site.css
   深空观测站：深底、等宽数据、纸色结论、冷光青交互
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:var(--cyan);text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 变量 ---------- */
:root{
  --ink-void:#050A1A;
  --ink-deep:#0B1533;
  --ink-mid:#12224D;
  --paper:#E8E2D6;
  --paper-ink:#241F16;
  --silver:#C9D3E6;
  --silver-dim:#8FA3C4;
  --cyan:#5FE3D0;
  --orange:#FF7A2F;
  --white:#F5F7FB;
  --line:#2A3F73;
  --line-soft:rgba(42,63,115,.55);
  --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","JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Noto Sans Mono",monospace;
  --shell-max:1280px;
  --shell-pad:clamp(1rem,4vw,2.5rem);
  --ribbon-h:78px;
  --ease:160ms ease;
}

/* ---------- 3. 基础与氛围 ---------- */
body{
  background-color:var(--ink-void);
  color:var(--silver);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(42,63,115,.45) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,63,115,.45) 1px,transparent 1px);
  background-size:96px 96px;
  opacity:.26;
  -webkit-mask-image:radial-gradient(130% 90% at 18% 0%,#000 0%,transparent 72%);
  mask-image:radial-gradient(130% 90% at 18% 0%,#000 0%,transparent 72%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(58% 44% at 80% 6%,rgba(95,227,208,.10),transparent 70%),
    radial-gradient(52% 40% at 6% 94%,rgba(255,122,47,.07),transparent 70%);
}
main{position:relative;z-index:1;display:block}
[data-section]{scroll-margin-top:104px}

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

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

.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--shell-pad)}

/* ---------- 4. 排版工具 ---------- */
.display-xl{font-size:clamp(2.75rem,8vw,7rem);line-height:.98;font-weight:900;letter-spacing:-.02em;color:var(--white)}
.display-l{font-size:clamp(2rem,4.6vw,2.75rem);line-height:1.14;font-weight:900;letter-spacing:-.01em;color:var(--white)}
.display-m{font-size:clamp(1.375rem,2.6vw,1.75rem);line-height:1.3;font-weight:800;color:var(--white)}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;color:var(--silver-dim);text-transform:uppercase}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:600;color:var(--orange)}
.v-note{writing-mode:vertical-rl;text-orientation:mixed;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--silver-dim)}
.prose{max-width:38em}
.prose>*+*{margin-top:1.1em}
.prose h2{margin-top:2em}
.prose strong{color:var(--white)}
.prose a{border-bottom:1px solid rgba(95,227,208,.45)}
.flow>*+*{margin-top:var(--flow,1.5rem)}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 5. 页面色带与纸面 ---------- */
.band{
  position:relative;display:flex;align-items:center;gap:1rem;flex-wrap:wrap;
  min-height:56px;padding:.75rem var(--shell-pad);
  background:var(--ink-deep);border-block:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;color:var(--silver-dim);
  text-transform:uppercase;
}
.band--paper{background:var(--paper);color:#4A4234;border-color:#CBC4B2}
.band__index{color:var(--orange);font-weight:600}
.band--paper .band__index{color:#8A3C0C}
.band__label{color:inherit}
.band[data-flash]{animation:band-flash 1.1s ease-out 1}
.band--paper[data-flash]{animation-name:band-flash-paper}
@keyframes band-flash{
  0%{background-color:rgba(95,227,208,.34);box-shadow:inset 0 0 0 1px rgba(95,227,208,.65)}
  100%{background-color:var(--ink-deep);box-shadow:inset 0 0 0 1px rgba(95,227,208,0)}
}
@keyframes band-flash-paper{
  0%{background-color:#FFF1E2}
  100%{background-color:var(--paper)}
}
.paper{background:var(--paper);color:var(--paper-ink);padding:clamp(2rem,5vw,4rem) 0}
.paper .display-xl,.paper .display-l,.paper .display-m{color:#14110B}
.paper .eyebrow,.paper .v-note,.paper .mono{color:#5A5245}
.paper a{color:#0B5F55}
.paper a:hover{color:#B34A0E}
.paper .rule{background:#CBC4B2}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:44px;padding:.6rem 1.25rem;
  border:1px solid var(--line);background:rgba(18,34,77,.55);color:var(--silver);
  font-size:14px;font-weight:600;letter-spacing:.04em;line-height:1.2;
  transition:border-color var(--ease),color var(--ease),background-color var(--ease);
}
.btn:hover,.btn:focus-visible{border-color:var(--cyan);color:var(--cyan);background:rgba(95,227,208,.09)}
.btn--signal{border-color:rgba(255,122,47,.65);color:var(--orange)}
.btn--signal:hover,.btn--signal:focus-visible{background:var(--orange);border-color:var(--orange);color:var(--ink-void)}
.btn--paper{background:var(--paper);border-color:var(--paper);color:var(--ink-void)}
.btn--paper:hover,.btn--paper:focus-visible{background:transparent;color:var(--paper);border-color:var(--paper)}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;padding-block:1rem;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--silver-dim)}
.breadcrumb li{display:flex;align-items:center;gap:.4rem}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a{display:inline-flex;align-items:center;min-height:32px;color:var(--silver-dim);border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease)}
.breadcrumb a:hover{color:var(--cyan);border-color:var(--cyan)}

/* ---------- 8. 栅格 ---------- */
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(1rem,2.2vw,1.75rem)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
.offset-1{grid-column-start:2}
.offset-2{grid-column-start:3}

/* ---------- 9. 数据组件 ---------- */
.stat{display:flex;flex-direction:column;gap:.35rem}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(2.5rem,6vw,4.5rem);line-height:1;font-weight:600;color:var(--white);
  transition:color var(--ease);
}
.stat:hover .stat__value{color:var(--orange)}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--silver-dim)}
.stat--signal .stat__value{color:var(--orange)}
.stat--signal:hover .stat__value{color:var(--cyan)}

.conclusion{background:var(--paper);color:var(--paper-ink);padding:clamp(1.25rem,3vw,2rem);border-left:4px solid var(--orange)}
.conclusion__label{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:#8A3C0C;margin-bottom:.5rem;text-transform:uppercase}
.conclusion p{font-size:clamp(1.05rem,2vw,1.375rem);font-weight:700;line-height:1.5}

.card{background:var(--ink-deep);border-top:2px solid var(--line);padding:clamp(1rem,2.5vw,1.5rem);transition:border-color var(--ease),background-color var(--ease)}
.card:hover{border-top-color:var(--cyan);background:rgba(18,34,77,.7)}
.glass{background:rgba(18,34,77,.55);-webkit-backdrop-filter:blur(10px) saturate(1.2);backdrop-filter:blur(10px) saturate(1.2);border:1px solid var(--line);padding:1rem 1.25rem}

.tag{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .6rem;border:1px solid var(--line);font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--silver-dim)}
.tag--cyan{color:var(--cyan);border-color:rgba(95,227,208,.45)}
.tag--signal{color:var(--orange);border-color:rgba(255,122,47,.5)}

.link-list li+li{border-top:1px solid var(--line-soft)}
.link-list a{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:48px;padding:.5rem .25rem;color:var(--silver);transition:color var(--ease),padding-left var(--ease),border-color var(--ease)}
.link-list a:hover{color:var(--cyan);padding-left:.75rem}

.field{position:relative;display:inline-flex;align-items:center;gap:.35rem;border-bottom:1px dashed var(--line);cursor:help}
.field__tip{
  position:absolute;left:0;bottom:calc(100% + .55rem);z-index:6;
  width:max-content;max-width:min(300px,78vw);padding:.55rem .75rem;
  background:var(--paper);color:var(--paper-ink);font-size:12px;line-height:1.55;font-family:var(--font-sans);letter-spacing:0;
  opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.field:hover .field__tip,.field:focus-within .field__tip{opacity:1;visibility:visible;transform:translateY(0)}

.data-table{font-family:var(--font-mono);font-size:13px;font-variant-numeric:tabular-nums;border-top:1px solid var(--line)}
.data-table caption{text-align:left;font-family:var(--font-sans);font-size:12px;letter-spacing:.2em;color:var(--silver-dim);padding-block:.6rem}
.data-table th,.data-table td{padding:.6rem .75rem;text-align:left;border-bottom:1px solid var(--line-soft)}
.data-table thead th{background:rgba(18,34,77,.6);color:var(--silver-dim);font-weight:500;letter-spacing:.08em}
.data-table tbody tr:nth-child(odd){background:rgba(18,34,77,.3)}
.data-table tbody tr:hover{background:rgba(95,227,208,.07)}

/* ---------- 10. 展开控件 ---------- */
.disclosure{border-top:1px solid var(--line)}
.disclosure>summary{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  min-height:52px;padding-block:.75rem;cursor:pointer;
  font-weight:600;color:var(--silver);list-style:none;
  transition:color var(--ease);
}
.disclosure>summary::-webkit-details-marker{display:none}
.disclosure>summary::after{content:"+";font-family:var(--font-mono);font-size:1.25rem;line-height:1;color:var(--cyan);transition:color var(--ease)}
.disclosure>summary:hover{color:var(--cyan)}
.disclosure[open]>summary::after{content:"−";color:var(--orange)}
.disclosure__body{padding-bottom:1.25rem;color:var(--silver-dim);font-size:15px}
.disclosure[open] .disclosure__body{animation:disclosure-in .26s ease-out both}
@keyframes disclosure-in{from{clip-path:inset(0 0 100% 0)}to{clip-path:inset(0 0 0 0)}}

/* ---------- 11. 图片容器 ---------- */
.media-frame{position:relative;overflow:hidden;background:linear-gradient(155deg,var(--ink-mid),var(--ink-deep));border:1px solid var(--line)}
.media-frame>img,.media-frame>picture>img,.media-frame>svg,.media-frame>video{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(42,63,115,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,63,115,.55) 1px,transparent 1px);
  background-size:38px 38px;opacity:.3;
}
.media-frame figcaption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:.6rem .8rem;background:linear-gradient(to top,rgba(5,10,26,.94),transparent);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--silver-dim);
}
.media-frame__note{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--silver-dim);text-align:center;
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}

/* ---------- 12. 跳转链接 ---------- */
.skip-link{
  position:fixed;left:var(--shell-pad);top:-120px;z-index:200;
  padding:.75rem 1.25rem;background:var(--paper);color:var(--ink-void);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transition:top var(--ease);
}
.skip-link:hover{color:var(--ink-void)}
.skip-link:focus{top:.5rem}

/* ---------- 13. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,26,.9);
  -webkit-backdrop-filter:blur(14px) saturate(1.25);
  backdrop-filter:blur(14px) saturate(1.25);
  border-bottom:1px solid var(--line);
}
.header-ribbon{
  max-height:var(--ribbon-h);overflow:hidden;
  background:linear-gradient(90deg,rgba(18,34,77,.85),rgba(5,10,26,.25));
  border-bottom:1px solid var(--line-soft);
  transition:max-height .28s ease,opacity .2s ease,border-color .2s ease;
}
.ribbon-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-block:.6rem}
.ribbon-brand{display:flex;align-items:baseline;gap:.65rem;flex-wrap:wrap}
.ribbon-mark{font-size:13px;font-weight:800;letter-spacing:.22em;color:var(--white)}
.ribbon-tagline{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--silver-dim)}
.ribbon-meta{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.ribbon-vnote{writing-mode:vertical-rl;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:rgba(143,163,196,.75);max-height:46px}
.ribbon-status{display:flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--silver-dim)}
.status-dot{width:7px;height:7px;flex:none;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 3px rgba(95,227,208,.16)}
.ribbon-cta{
  display:inline-flex;align-items:center;min-height:34px;padding:.25rem .8rem;
  border:1px solid var(--line);color:var(--silver);font-size:12px;font-weight:600;letter-spacing:.08em;
  transition:border-color var(--ease),color var(--ease),background-color var(--ease);
}
.ribbon-cta:hover,.ribbon-cta:focus-visible{border-color:var(--orange);color:var(--orange);background:rgba(255,122,47,.1)}
.site-header[data-compact] .header-ribbon{max-height:0;opacity:0;border-bottom-color:transparent}

.header-nav{position:relative}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px}
.nav-brand{display:inline-flex;align-items:center;gap:.65rem;min-height:44px;color:var(--white);font-weight:800;letter-spacing:.06em}
.nav-brand:hover{color:var(--white)}
.nav-brand-glyph{width:13px;height:13px;flex:none;border:1px solid var(--cyan);transform:rotate(45deg);box-shadow:0 0 0 4px rgba(95,227,208,.12)}
.nav-brand-text{font-size:16px}
.nav-brand-note{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--silver-dim)}

.site-nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:.15rem}
.nav-link{
  position:relative;display:flex;align-items:center;gap:.45rem;
  min-height:44px;padding:.4rem .7rem;
  border:1px solid transparent;color:var(--silver);font-size:14px;letter-spacing:.02em;
  transition:color var(--ease),border-color var(--ease),background-color var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cyan);border-color:var(--line);background:rgba(95,227,208,.06)}
.nav-index{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--silver-dim);transition:color var(--ease)}
.nav-link:hover .nav-index{color:var(--cyan)}
.nav-link[aria-current="page"]{color:var(--white);border-color:var(--line);background:rgba(18,34,77,.85)}
.nav-link[aria-current="page"] .nav-index{color:var(--orange)}
.nav-link[aria-current="page"]::after{content:"";position:absolute;left:.7rem;right:.7rem;bottom:-1px;height:2px;background:var(--orange)}

.nav-toggle{
  display:none;align-items:center;gap:.6rem;min-height:44px;padding:.4rem .8rem;
  border:1px solid var(--line);color:var(--silver);font-size:13px;letter-spacing:.12em;
  transition:border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:18px}
.nav-toggle-bars span{display:block;height:2px;width:100%;background:currentColor;transition:transform var(--ease),opacity var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.progress-track{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(42,63,115,.5);pointer-events:none}
.progress-fill{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--cyan),var(--orange));transition:transform 120ms linear}

/* ---------- 14. 页脚 ---------- */
.site-footer{position:relative;z-index:1;margin-top:clamp(3rem,8vw,6rem);background:var(--ink-deep);border-top:1px solid var(--line)}
.site-footer::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--orange) 0%,var(--cyan) 30%,var(--line) 62%,var(--paper) 100%)}
.footer-top{display:grid;grid-template-columns:1.35fr 2fr 1.2fr;gap:clamp(1.75rem,4vw,3rem);padding-block:clamp(2.5rem,6vw,4rem)}
.footer-mark{font-size:18px;font-weight:800;letter-spacing:.2em;color:var(--white)}
.footer-tagline{margin-top:.35rem;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;color:var(--silver-dim)}
.footer-desc{margin-top:1rem;max-width:30em;font-size:14px;line-height:1.8;color:var(--silver-dim)}
.footer-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}
.footer-group-title{font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.24em;color:var(--cyan);text-transform:uppercase}
.footer-list{margin-top:.5rem}
.footer-link{display:inline-flex;align-items:center;min-height:44px;color:var(--silver-dim);font-size:14px;transition:color var(--ease),padding-left var(--ease)}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan);padding-left:.4rem}
.footer-contact{display:flex;flex-direction:column;align-items:flex-start;gap:.35rem}
.contact-line{font-size:13.5px;color:var(--silver);word-break:break-all}
.contact-note{margin-top:.5rem;font-size:12.5px;line-height:1.7;color:var(--silver-dim)}
.footer-contact .btn{margin-top:.75rem}
.footer-bottom{border-top:1px solid var(--line);background:rgba(5,10,26,.65)}
.footer-bottom-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem 2rem;padding-block:1.25rem;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--silver-dim)}
.footer-note{max-width:62ch}
.footer-copy{color:var(--silver-dim)}
.footer-icp{color:var(--silver-dim);border-bottom:1px solid var(--line);padding-bottom:1px}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1080px){
  .nav-link{font-size:13px;padding-inline:.55rem}
  .nav-index{display:none}
}
@media (max-width:1099px){
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:899px){
  :root{--ribbon-h:118px}
  .ribbon-vnote{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;
    padding-inline:var(--shell-pad);
    background:rgba(11,21,51,.98);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;visibility:hidden;
    transition:max-height .26s ease,visibility .26s ease;
  }
  .site-nav[data-open]{max-height:calc(100vh - 120px);overflow-y:auto;visibility:visible}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding-block:.5rem}
  .nav-link{min-height:52px;padding-inline:0;border:0;border-bottom:1px solid var(--line-soft)}
  .nav-link[aria-current="page"]{background:transparent;border-color:var(--orange)}
  .nav-link[aria-current="page"]::after{display:none}
  .nav-index{display:inline}
  .grid-12{grid-template-columns:repeat(12,minmax(0,1fr));gap:1rem}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .offset-1,.offset-2{grid-column-start:auto}
  .footer-groups{grid-template-columns:1fr 1fr}
}
@media (max-width:599px){
  .ribbon-tagline{display:none}
  .ribbon-status{font-size:11px}
  .footer-groups{grid-template-columns:1fr}
  .ribbon-cta{min-height:36px}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start}
}

/* ---------- 16. 降低动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}