/* ===========================================================
   江南体育 · 共享样式 /assets/site.css
   骨架：命令栏页头 + 档案底盘页脚 + 通用粗野主义构件
   =========================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --jn-jade:#0F6F6B;
  --jn-jade-deep:#083F47;
  --jn-jade-pale:#D7E8E3;
  --jn-flame:#FF5A2B;
  --jn-flame-dark:#C43A12;
  --jn-night:#0B1B33;
  --jn-silver:#C6CFD4;
  --jn-paper:#F6F4EE;
  --jn-ink:#12181C;
  --jn-gold:#F2A93B;
  --jn-wine:#7A2138;

  --jn-font-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Heiti SC",system-ui,sans-serif;
  --jn-font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --jn-font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --jn-max:1240px;
  --jn-gutter:clamp(16px,3.4vw,32px);
  --jn-border:3px solid var(--jn-ink);
  --jn-shadow-hard:6px 6px 0 rgba(18,24,28,.9);
  --jn-shadow-jade:8px 8px 0 rgba(8,63,71,.28);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;
  background:var(--jn-paper);
  color:var(--jn-ink);
  font-family:var(--jn-font-body);
  font-size:clamp(16px,0.55vw + 14.6px,18px);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0}
a{color:var(--jn-jade);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--jn-flame-dark)}
:focus-visible{outline:2px solid var(--jn-gold);outline-offset:3px}

/* ---------- 3. 排版工具 ---------- */
.jn-mono{font-family:var(--jn-font-mono);font-size:.84em;letter-spacing:.08em;font-variant-numeric:tabular-nums}
.jn-timestamp{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid var(--jn-silver);background:rgba(255,255,255,.6);
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.1em;color:var(--jn-jade-deep);
}
.jn-vertical-note{
  writing-mode:vertical-rl;font-family:var(--jn-font-mono);
  font-size:11.5px;letter-spacing:.28em;color:var(--jn-jade-deep);opacity:.82;
}
.jn-rule{height:3px;border:0;margin:0;background:var(--jn-ink)}
.jn-rule--thin{height:1px;background:var(--jn-silver)}

/* ---------- 4. 容器与章节 ---------- */
.jn-container{width:100%;max-width:var(--jn-max);margin-inline:auto;padding-inline:var(--jn-gutter)}
.jn-section{padding-block:clamp(40px,6vw,80px)}
.jn-section--tight{padding-block:clamp(24px,3.5vw,48px)}
.jn-section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:clamp(12px,2vw,22px);
  padding-bottom:14px;margin-bottom:clamp(20px,3vw,36px);
  border-bottom:3px solid var(--jn-ink);
}
.jn-num{
  display:inline-block;font-family:var(--jn-font-display);font-weight:900;
  font-size:clamp(28px,4.4vw,50px);line-height:1;letter-spacing:-.05em;
  color:transparent;-webkit-text-stroke:2px var(--jn-jade);
}
@supports not (-webkit-text-stroke:1px #000){.jn-num{color:var(--jn-jade)}}
.jn-kicker{
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--jn-wine);
}
.jn-title{
  font-family:var(--jn-font-display);font-weight:900;letter-spacing:-.02em;
  line-height:1.12;font-size:clamp(28px,4.6vw,52px);color:var(--jn-night);
}
.jn-lede{
  max-width:62ch;font-size:clamp(16px,1.05vw + 13px,19px);
  line-height:1.78;color:rgba(18,24,28,.78);
}

/* ---------- 5. 网格 ---------- */
.jn-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,2vw,24px)}
.jn-span-3{grid-column:span 3}
.jn-span-4{grid-column:span 4}
.jn-span-5{grid-column:span 5}
.jn-span-6{grid-column:span 6}
.jn-span-7{grid-column:span 7}
.jn-span-8{grid-column:span 8}
.jn-span-12{grid-column:span 12}
@media (max-width:980px){
  .jn-span-3,.jn-span-4,.jn-span-5{grid-column:span 6}
  .jn-span-7,.jn-span-8{grid-column:span 12}
}
@media (max-width:640px){
  .jn-grid{grid-template-columns:1fr}
  .jn-span-3,.jn-span-4,.jn-span-5,.jn-span-6,.jn-span-7,.jn-span-8,.jn-span-12{grid-column:auto}
}

/* ---------- 6. 按钮与芯片 ---------- */
.jn-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:2px solid transparent;border-radius:0;
  font-family:var(--jn-font-body);font-size:14px;font-weight:700;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.jn-btn-primary{
  background:var(--jn-flame);color:var(--jn-ink);
  border-color:var(--jn-ink);box-shadow:4px 4px 0 var(--jn-ink);
}
.jn-btn-primary:hover,.jn-btn-primary:focus-visible{
  background:var(--jn-flame-dark);color:#fff;
  box-shadow:2px 2px 0 var(--jn-ink);transform:translate(2px,2px);
}
.jn-btn-ghost{
  background:transparent;color:var(--jn-jade-deep);border-color:var(--jn-jade-deep);
}
.jn-btn-ghost:hover,.jn-btn-ghost:focus-visible{background:var(--jn-jade-pale);color:var(--jn-night)}

.jn-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;background:var(--jn-paper);color:var(--jn-jade-deep);
  border:2px solid var(--jn-ink);font-size:14px;font-weight:600;cursor:pointer;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.jn-chip:hover{background:var(--jn-jade-pale)}
.jn-chip[aria-pressed="true"],.jn-chip.is-active{
  background:var(--jn-flame);color:var(--jn-ink);
  box-shadow:3px 3px 0 var(--jn-ink);transform:translate(-1px,-1px);
}

/* ---------- 7. 卡片 / 标签 / 框景 / 数据条 ---------- */
.jn-card{
  position:relative;background:var(--jn-paper);border:var(--jn-border);
  padding:clamp(18px,2.6vw,30px);box-shadow:var(--jn-shadow-hard);
}
.jn-card--dark{background:var(--jn-jade-deep);color:var(--jn-paper)}
.jn-card--jade{background:var(--jn-jade);color:#fff}
.jn-card--pale{background:var(--jn-jade-pale)}
.jn-card--night{background:var(--jn-night);color:var(--jn-silver)}
.jn-card--float{box-shadow:10px 10px 0 var(--jn-flame);transform:translateY(-4px)}
.jn-card-title{
  font-family:var(--jn-font-display);font-weight:800;
  font-size:clamp(19px,1.6vw,24px);line-height:1.25;letter-spacing:-.01em;
}
.jn-card--dark .jn-card-title,.jn-card--jade .jn-card-title,.jn-card--night .jn-card-title{color:#fff}
.jn-card-body{margin-top:10px;font-size:15.5px;line-height:1.72}
.jn-card-meta{
  margin-top:14px;padding-top:12px;border-top:1px dashed var(--jn-silver);
  display:flex;flex-wrap:wrap;gap:8px 14px;
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.08em;color:var(--jn-jade-deep);
}
.jn-card--dark .jn-card-meta,.jn-card--night .jn-card-meta{
  border-color:rgba(198,207,212,.35);color:var(--jn-silver);
}

.jn-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border:1px solid currentColor;
  font-family:var(--jn-font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--jn-wine);background:rgba(122,33,56,.06);
}
.jn-tag--jade{color:var(--jn-jade);background:rgba(15,111,107,.09)}
.jn-tag--gold{color:#8A5A0B;background:rgba(242,169,59,.16)}

.jn-frame{
  position:relative;overflow:hidden;
  padding:clamp(20px,3.6vw,44px);
  background:var(--jn-night);color:var(--jn-paper);
  border:3px solid var(--jn-ink);box-shadow:12px 12px 0 rgba(15,111,107,.35);
}
.jn-frame::before{
  content:"";position:absolute;inset:8px;
  border:1px dashed rgba(198,207,212,.32);pointer-events:none;
}
.jn-frame::after{
  content:"";position:absolute;left:0;top:0;width:100%;height:6px;
  background-image:repeating-linear-gradient(90deg,var(--jn-flame) 0 2px,transparent 2px 18px);
  opacity:.85;
}
.jn-frame-inner{position:relative;z-index:1}
.jn-frame-side{
  position:absolute;right:12px;top:50%;transform:translateY(-50%);
  writing-mode:vertical-rl;
  font-family:var(--jn-font-mono);font-size:11px;letter-spacing:.3em;
  color:rgba(198,207,212,.72);
}

.jn-data-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px clamp(14px,2.4vw,30px);
  padding:12px clamp(14px,2vw,20px);
  background:var(--jn-night);color:var(--jn-silver);
  border-top:3px solid var(--jn-ink);
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.1em;
}
.jn-data-item{display:inline-flex;align-items:center;gap:8px}
.jn-data-item strong{color:var(--jn-gold);font-weight:700}

/* ---------- 8. 图片容器（页面阶段放图） ---------- */
.jn-media{
  position:relative;display:block;overflow:hidden;
  background:linear-gradient(150deg,var(--jn-jade-deep),var(--jn-night));
  border:3px solid var(--jn-ink);box-shadow:var(--jn-shadow-hard);
}
.jn-media img{width:100%;height:100%;object-fit:cover;display:block}
.jn-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(160deg,rgba(15,111,107,.16),rgba(11,27,51,.44));
}
.jn-media--16x9{aspect-ratio:16/9}
.jn-media--4x3{aspect-ratio:4/3}
.jn-media--1x1{aspect-ratio:1/1}
.jn-media--3x4{aspect-ratio:3/4}
.jn-media--wide{aspect-ratio:21/9}
.jn-media--flat{border-width:0;box-shadow:none}
.jn-media figcaption{
  position:absolute;left:0;bottom:0;right:0;z-index:2;
  padding:10px 14px;background:rgba(11,27,51,.82);color:var(--jn-silver);
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.08em;
}

/* ---------- 9. 面包屑 ---------- */
.jn-breadcrumb{padding-block:14px}
.jn-breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.1em;color:var(--jn-jade-deep);
}
.jn-breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.jn-breadcrumb-item + .jn-breadcrumb-item::before{content:"/";color:var(--jn-flame)}
.jn-breadcrumb-link{color:var(--jn-jade);text-decoration:none;border-bottom:1px solid transparent}
.jn-breadcrumb-link:hover{border-bottom-color:var(--jn-flame);color:var(--jn-flame-dark)}
.jn-breadcrumb-item[aria-current="page"]{color:var(--jn-ink)}

/* ---------- 10. 滚动显现 ---------- */
.jn-reveal{opacity:1;transform:none}
html.jn-js .jn-reveal{
  opacity:0;transform:translateY(16px);
  transition:opacity 320ms ease-out,transform 320ms ease-out;
}
html.jn-js .jn-reveal.is-in{opacity:1;transform:none}

/* ---------- 11. 页头：刻度 + 命令栏 ---------- */
.jn-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(90deg,var(--jn-night) 0%,var(--jn-jade-deep) 52%,var(--jn-night) 100%);
  color:var(--jn-paper);
  border-bottom:3px solid var(--jn-ink);
}
.jn-scale{
  height:6px;
  background-image:repeating-linear-gradient(90deg,rgba(198,207,212,.55) 0 1px,transparent 1px 16px);
  border-bottom:1px solid rgba(198,207,212,.18);
}
.jn-skip{
  position:absolute;left:12px;top:-72px;z-index:120;
  padding:10px 16px;background:var(--jn-flame);color:var(--jn-ink);
  font-weight:700;text-decoration:none;border:2px solid var(--jn-ink);
  transition:top .18s ease;
}
.jn-skip:focus{top:12px;color:var(--jn-ink)}

.jn-cmdbar{
  display:flex;align-items:center;gap:clamp(10px,1.4vw,20px);
  min-height:66px;padding-block:10px;
}

.jn-brand{
  display:flex;align-items:center;gap:10px;flex:0 0 auto;
  padding:4px 2px;text-decoration:none;color:inherit;
}
.jn-brand-mark{
  position:relative;display:block;width:30px;height:30px;flex:0 0 auto;
  background:var(--jn-jade);border:2px solid var(--jn-ink);
  box-shadow:3px 3px 0 var(--jn-flame);
}
.jn-brand-mark-core{
  position:absolute;inset:0;
  background:linear-gradient(135deg,transparent 0 46%,var(--jn-flame) 46% 100%);
}
.jn-brand-text{display:flex;flex-direction:column;line-height:1.15}
.jn-brand-name{
  font-family:var(--jn-font-display);font-weight:900;font-size:19px;
  letter-spacing:.02em;color:#fff;
}
.jn-brand-tag{
  font-family:var(--jn-font-mono);font-size:10.5px;letter-spacing:.18em;
  color:rgba(198,207,212,.78);
}

.jn-nav{flex:1 1 auto;min-width:0}
.jn-nav-list{display:flex;align-items:stretch;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.jn-nav-list::-webkit-scrollbar{display:none}
.jn-nav-item{display:flex}
.jn-nav-link{
  position:relative;display:flex;flex-direction:column;gap:1px;
  padding:9px 12px;color:var(--jn-silver);text-decoration:none;white-space:nowrap;
  border-left:1px solid rgba(198,207,212,.16);
  transition:color .18s ease,background .18s ease;
}
.jn-nav-item:last-child .jn-nav-link{border-right:1px solid rgba(198,207,212,.16)}
.jn-nav-index{
  font-family:var(--jn-font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(198,207,212,.55);
}
.jn-nav-label{font-size:14px;font-weight:600;letter-spacing:.03em}
.jn-nav-link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:3px;height:2px;
  background:var(--jn-flame);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.jn-nav-link:hover,.jn-nav-link:focus-visible{color:#fff;background:rgba(15,111,107,.36)}
.jn-nav-link:hover::after,.jn-nav-link:focus-visible::after{transform:scaleX(1)}
.jn-nav-link[aria-current="page"]{color:#fff;background:rgba(15,111,107,.52)}
.jn-nav-link[aria-current="page"] .jn-nav-index{color:var(--jn-gold)}
.jn-nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--jn-flame)}

.jn-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.jn-status{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 11px;border:1px solid rgba(198,207,212,.4);border-radius:999px;
  font-family:var(--jn-font-mono);font-size:11px;letter-spacing:.12em;color:var(--jn-silver);
}
.jn-status-dot{
  width:8px;height:8px;border-radius:50%;flex:0 0 auto;
  background:var(--jn-silver);box-shadow:0 0 0 3px rgba(198,207,212,.16);
}
.jn-status[data-status="refresh"] .jn-status-dot{
  background:var(--jn-flame);box-shadow:0 0 0 3px rgba(255,90,43,.22);
  animation:jn-pulse 2.4s ease-in-out infinite;
}
.jn-status[data-status="lock"] .jn-status-dot{
  background:var(--jn-wine);box-shadow:0 0 0 3px rgba(122,33,56,.28);
}
.jn-status[data-status="wait"] .jn-status-dot{
  background:var(--jn-silver);box-shadow:0 0 0 3px rgba(198,207,212,.16);
}
@keyframes jn-pulse{
  0%,100%{transform:scale(1);opacity:1}
  50%{transform:scale(1.35);opacity:.62}
}

.jn-nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:8px 12px;color:var(--jn-paper);
  border:2px solid rgba(198,207,212,.5);border-radius:0;
  font-size:13px;font-weight:600;letter-spacing:.16em;cursor:pointer;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.jn-nav-toggle:hover,.jn-nav-toggle:focus-visible{
  border-color:var(--jn-flame);color:#fff;background:rgba(255,90,43,.14);
}
.jn-nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:18px}
.jn-nav-toggle-bars i{display:block;height:2px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle-bars i:nth-child(2){opacity:0}
.jn-nav-toggle[aria-expanded="true"] .jn-nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.jn-progress{
  position:absolute;left:0;bottom:0;z-index:2;
  width:0;height:3px;background:var(--jn-flame);
}

@media (max-width:1180px){
  .jn-nav-index{display:none}
  .jn-status-text{display:none}
  .jn-nav-link{padding:10px 10px}
}

/* ---------- 12. 页头：移动导航 ---------- */
@media (max-width:900px){
  .jn-nav-toggle{display:inline-flex;margin-left:auto}
  .jn-cmdbar{position:relative;gap:10px;min-height:60px}
  .jn-nav{
    position:absolute;top:100%;left:0;right:0;z-index:90;
    max-height:calc(100vh - 80px);overflow-y:auto;
    background:var(--jn-night);
    border-bottom:3px solid var(--jn-flame);
    box-shadow:0 22px 44px rgba(11,27,51,.55);
    visibility:hidden;opacity:0;transform:translateY(-8px);
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  }
  .jn-nav[data-open]{
    visibility:visible;opacity:1;transform:translateY(0);
  }
  .jn-nav-list{display:block;overflow:visible;padding:6px var(--jn-gutter) 16px}
  .jn-nav-item{display:block;border-bottom:1px solid rgba(198,207,212,.14)}
  .jn-nav-link{
    flex-direction:row;align-items:center;gap:14px;
    padding:14px 2px;border-left:0;color:var(--jn-paper);
  }
  .jn-nav-item:last-child .jn-nav-link{border-right:0}
  .jn-nav-index{display:inline-block;font-size:11.5px;color:rgba(198,207,212,.6)}
  .jn-nav-label{font-size:17px}
  .jn-nav-link::after{left:2px;right:auto;width:26px;bottom:9px}
}

@media (max-width:560px){
  .jn-cta{padding:9px 12px;font-size:12.5px;box-shadow:3px 3px 0 var(--jn-ink)}
  .jn-cta:hover,.jn-cta:focus-visible{box-shadow:1px 1px 0 var(--jn-ink)}
  .jn-nav-toggle{padding:7px 9px}
  .jn-nav-toggle-label{display:none}
  .jn-brand-tag{display:none}
}
@media (max-width:420px){
  .jn-brand-name{font-size:16px}
  .jn-brand-mark{width:26px;height:26px}
}

/* ---------- 13. 页脚：档案底盘 ---------- */
.jn-footer{
  margin-top:clamp(48px,8vw,110px);
  background:var(--jn-night);color:var(--jn-silver);
  border-top:3px solid var(--jn-ink);
}
.jn-footer-strip{
  height:6px;
  background:repeating-linear-gradient(90deg,
    var(--jn-jade) 0 64px,
    var(--jn-flame) 64px 78px,
    var(--jn-jade-deep) 78px 150px);
}
.jn-footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:clamp(20px,3.4vw,44px);
  padding-block:clamp(34px,5vw,62px);
}
.jn-footer-brandline{
  font-family:var(--jn-font-display);font-weight:900;
  font-size:clamp(20px,2.2vw,26px);line-height:1.28;letter-spacing:-.01em;
  color:var(--jn-paper);
}
.jn-footer-note{
  margin-top:12px;max-width:36ch;font-size:14.5px;line-height:1.72;
  color:rgba(198,207,212,.82);
}
.jn-footer-mono{
  display:inline-block;margin-top:16px;padding:5px 10px;
  border:1px solid rgba(242,169,59,.45);color:var(--jn-gold);
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.16em;
}
.jn-footer-title{
  margin-bottom:14px;padding-bottom:8px;
  border-bottom:1px solid rgba(198,207,212,.3);
  font-family:var(--jn-font-mono);font-size:12px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--jn-paper);
}
.jn-footer-links{display:flex;flex-direction:column;gap:2px}
.jn-footer-link{
  display:inline-flex;align-items:center;gap:9px;padding:6px 0;
  color:var(--jn-silver);text-decoration:none;font-size:15px;
  border-bottom:1px solid transparent;
  transition:color .18s ease,padding-left .18s ease;
}
.jn-footer-link::before{
  content:"";flex:0 0 auto;width:6px;height:6px;
  background:var(--jn-silver);opacity:.5;
  transition:background .18s ease,opacity .18s ease;
}
.jn-footer-link:hover,.jn-footer-link:focus-visible{color:#fff;padding-left:4px}
.jn-footer-link:hover::before,.jn-footer-link:focus-visible::before{background:var(--jn-flame);opacity:1}

.jn-footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 24px;
  padding-block:18px 28px;
  border-top:1px solid rgba(198,207,212,.22);
}
.jn-footer-contact{
  flex:1 1 320px;
  font-family:var(--jn-font-mono);font-size:12.5px;letter-spacing:.05em;
  line-height:1.75;color:rgba(198,207,212,.85);
}
.jn-footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;
  font-family:var(--jn-font-mono);font-size:12px;letter-spacing:.1em;
  color:rgba(198,207,212,.75);
}
.jn-footer-sep{color:var(--jn-gold)}
.jn-to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;background:transparent;color:var(--jn-silver);
  border:2px solid rgba(198,207,212,.5);
  font-family:var(--jn-font-mono);font-size:11.5px;letter-spacing:.16em;cursor:pointer;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.jn-to-top::after{content:"↑";font-size:14px;line-height:1}
.jn-to-top:hover,.jn-to-top:focus-visible{
  border-color:var(--jn-flame);color:#fff;background:rgba(255,90,43,.14);
}

@media (max-width:980px){
  .jn-footer-grid{grid-template-columns:1fr 1fr}
  .jn-footer-brand{grid-column:1 / -1}
}
@media (max-width:600px){
  .jn-footer-grid{grid-template-columns:1fr}
}

/* ---------- 14. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html.jn-js .jn-reveal{opacity:1;transform:none;transition:none}
  .jn-status[data-status="refresh"] .jn-status-dot{animation:none}
  .jn-chip[aria-pressed="true"]{transform:none}
  .jn-card--float{transform:none}
}