/* ==========================================================================
   PG俱乐部 · 共享站点样式  /assets/site.css
   深靛蓝底 + 电光青 / 暖琥珀 / 红橙点色 · 左侧索引轨道 + 切角面板
   ========================================================================== */

:root{
  --ink-900:#0B1230;
  --ink-800:#131C46;
  --line:#2A3668;
  --paper:#F4EFE3;
  --paper-ink:#221C18;
  --paper-accent:#A83C12;
  --cyan:#3FE3D2;
  --amber:#FFB13B;
  --flame:#FF6B3D;
  --hi:#E9ECFF;
  --mute:#A8B0DA;
  --rail-w:78px;
  --topbar-h:56px;
  --wrap:1080px;
  --cut:16px;
  --font-display:"Archivo Black","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-sub:"Inter","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"IBM Plex Sans Condensed","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--topbar-h);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 560px at 82% -12%,rgba(63,227,210,.08),transparent 68%),
    radial-gradient(900px 520px at 6% 108%,rgba(255,177,59,.06),transparent 70%);
  background-repeat:no-repeat;
  color:var(--hi);
  font:400 17px/1.75 var(--font-body);
  word-break:break-word;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-family:var(--font-sub);font-weight:700;line-height:1.26;letter-spacing:-.01em}
p{margin:0}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--amber)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
::selection{background:var(--amber);color:var(--paper-ink)}
[hidden]{display:none !important}

@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:14px;top:-120px;z-index:200;
  padding:12px 20px;background:var(--amber);color:var(--paper-ink);
  font:700 14px/1 var(--font-sub);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:top .2s ease;
}
.skip-link:focus{top:14px;color:var(--paper-ink)}

/* ---------- 头部外壳 ---------- */
.site-header{position:fixed;inset:0;z-index:80;pointer-events:none}
.site-header a,.site-header button{pointer-events:auto}

.rail{
  position:absolute;top:0;left:0;bottom:0;width:var(--rail-w);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:0 0 16px;background:var(--ink-900);
  border-right:1px solid var(--line);
}
.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  width:100%;padding:16px 6px 14px;border-bottom:1px solid var(--line);
  color:var(--hi);
}
.rail__brand:hover{color:var(--hi)}
.rail__mark{
  display:grid;place-items:center;width:40px;height:40px;
  background:var(--amber);color:var(--ink-900);
  font:900 15px/1 var(--font-display);letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 11px),calc(100% - 11px) 100%,0 100%);
}
.rail__brand-text{display:flex;flex-direction:column;align-items:center;gap:5px;text-align:center}
.rail__brand-name{font:900 13px/1 var(--font-display);letter-spacing:.02em;color:var(--paper)}
.rail__brand-sub{font:500 10px/1 var(--font-mono);letter-spacing:.08em;color:var(--amber)}

.rail__nav{width:100%;flex:1 1 auto;overflow-y:auto;overflow-x:hidden;padding:6px 0}
.rail__list{display:flex;flex-direction:column;align-items:center;gap:2px}
.rail__item{width:100%}
.rail__link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:7px;
  padding:11px 4px;color:var(--mute);
  transition:color .2s ease,background-color .2s ease;
}
.rail__link:hover{color:var(--hi)}
.rail__num{font:500 10px/1 var(--font-mono);letter-spacing:.1em;color:var(--mute);opacity:.7}
.rail__label{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-sub);font-weight:600;font-size:13px;letter-spacing:.16em;line-height:1;
}
.rail__link[aria-current="page"]{color:var(--cyan)}
.rail__link[aria-current="page"] .rail__num{color:var(--amber);opacity:1}
.rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  background:var(--cyan);border-radius:0 2px 2px 0;transform-origin:top center;
  animation:rail-extend .24s ease-out both;
}
@keyframes rail-extend{from{transform:scaleY(.2);opacity:0}to{transform:scaleY(1);opacity:1}}

.rail__foot{
  width:100%;display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:12px 8px 0;border-top:1px solid var(--line);
}
.rail__stamp{font:500 10px/1 var(--font-mono);letter-spacing:.06em;color:var(--mute)}
.rail__top{
  display:flex;flex-direction:column;align-items:center;gap:3px;width:50px;padding:8px 0;
  border:1px solid var(--line);background:var(--ink-800);color:var(--cyan);
  font:500 10px/1 var(--font-mono);
  transition:border-color .2s ease,transform .2s ease;
  animation:rail-rise .24s ease-out both;
}
.rail__top:hover{border-color:var(--cyan);transform:translateY(-2px)}
.rail__top-icon{font-size:14px;line-height:1}
.rail__top-text{letter-spacing:.08em}
@keyframes rail-rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

.nav-scrim{
  position:absolute;inset:0;z-index:1;
  background:rgba(11,18,48,.76);
  backdrop-filter:blur(2px);
}

.topbar{
  position:absolute;top:0;left:0;right:0;height:var(--topbar-h);z-index:3;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 16px;background:rgba(11,18,48,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
  pointer-events:auto;
}
.topbar__lead{display:flex;align-items:baseline;gap:12px;min-width:0}
.topbar__brand{display:none;font:900 15px/1 var(--font-display);color:var(--paper);letter-spacing:.01em}
.topbar__brand:hover{color:var(--amber)}
.topbar__sub{
  font:500 12px/1 var(--font-mono);letter-spacing:.16em;color:var(--mute);
  text-transform:uppercase;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.topbar__progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.topbar__progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--amber) 100%);
  transition:width .12s linear;
}

/* 版本胶囊 */
.status-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--line);background:var(--ink-800);color:var(--hi);
  font:500 12px/1 var(--font-mono);letter-spacing:.06em;white-space:nowrap;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .2s ease,background-color .2s ease,color .2s ease;
}
.status-pill:hover{border-color:var(--cyan);color:#FFFFFF}
.status-pill__dot{
  width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(63,227,210,.16);
  animation:pulse 2.6s ease-in-out infinite;
}
.status-pill__chev{font-size:10px;line-height:1;color:var(--mute);transition:transform .24s ease}
.status-pill[aria-expanded="true"]{border-color:var(--cyan)}
.status-pill[aria-expanded="true"] .status-pill__chev{transform:rotate(180deg);color:var(--cyan)}
.status-pill--static{cursor:default}
.status-pill--static:hover{border-color:var(--line);color:var(--hi)}
.status-pill--warn .status-pill__dot{background:var(--amber);box-shadow:0 0 0 3px rgba(255,177,59,.18)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.42}}

/* 移动导航按钮 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;padding:8px 12px;
  border:1px solid var(--line);background:var(--ink-800);color:var(--hi);
  font:500 12px/1 var(--font-mono);letter-spacing:.08em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .2s ease;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:11px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--cyan);
  transition:transform .24s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle__text{letter-spacing:.1em}

/* 版本状态面板 */
.status-panel{
  position:absolute;top:calc(var(--topbar-h) + 10px);right:16px;z-index:4;
  width:min(340px,calc(100vw - 32px));padding:18px;
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(0,0,0,.52);
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
  pointer-events:auto;
}
.status-panel__title{
  font:500 12px/1 var(--font-mono);letter-spacing:.14em;color:var(--amber);
  text-transform:uppercase;padding-bottom:12px;border-bottom:1px solid var(--line);
}
.status-panel__rows{display:flex;flex-direction:column;gap:1px;margin:14px 0 16px}
.status-panel__row{display:flex;justify-content:space-between;gap:14px;padding:7px 0;font:500 13px/1.5 var(--font-mono)}
.status-panel__key{color:var(--mute);letter-spacing:.04em}
.status-panel__row dd{margin:0}
.status-panel__val{color:var(--hi);text-align:right}
.status-panel__val--warn{color:var(--flame)}
.status-panel__foot{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(56px,7vw,96px);
  background:var(--ink-900);border-top:1px solid var(--line);color:var(--hi);
}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;width:180px;height:2px;background:var(--amber)}
.footer__inner{width:min(100% - 40px,var(--wrap));margin-inline:auto}
.footer__grid{
  display:grid;grid-template-columns:1fr;gap:36px;
  padding:clamp(40px,5vw,64px) 0 40px;
}
.footer__col{min-width:0}
.footer__col--brand{display:flex;flex-direction:column;align-items:flex-start}
.footer__title{
  font:700 12px/1 var(--font-sub);letter-spacing:.16em;color:var(--mute);
  text-transform:uppercase;padding-bottom:12px;margin-bottom:16px;border-bottom:1px solid var(--line);
}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{
  color:var(--hi);font-size:15px;border-bottom:1px dashed transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer__list a:hover{color:var(--cyan);border-color:var(--cyan)}
.footer__brand{font:900 clamp(22px,3vw,28px)/1 var(--font-display);letter-spacing:-.01em;color:var(--paper)}
.footer__sub{margin-top:10px;font:500 12px/1 var(--font-mono);letter-spacing:.2em;color:var(--amber)}
.footer__note{margin-top:14px;max-width:34ch;font-size:14.5px;line-height:1.7;color:var(--mute)}
.footer__col--brand .status-pill{margin-top:18px}
.footer__bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 28px;padding:22px 0 30px;border-top:1px solid var(--line);
  color:var(--mute);font-size:13px;
}
.footer__legal{font-family:var(--font-mono);font-size:12px;letter-spacing:.03em}
.footer__contact{display:flex;flex-wrap:wrap;gap:8px 22px;font-family:var(--font-mono);font-size:12px;color:var(--mute)}
.footer__contact li{color:var(--mute)}
.footer__strong{color:var(--hi)}
.footer__hours{font:500 12px/1 var(--font-mono);letter-spacing:.06em;color:var(--amber)}

/* ---------- 布局容器 ---------- */
.wrap{width:min(100% - 40px,var(--wrap));margin-inline:auto}
.section{padding:clamp(48px,6vw,92px) 0}
.section--tight{padding:clamp(32px,4vw,52px) 0}

.grid{display:grid;gap:clamp(18px,2.2vw,28px);grid-template-columns:1fr}
@media (min-width:768px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:900px){
  .grid--7-5{grid-template-columns:7fr 5fr}
  .grid--5-7{grid-template-columns:5fr 7fr}
}

/* ---------- 编号章节 ---------- */
.chapter{
  display:grid;grid-template-columns:1fr;gap:14px;
  padding-top:clamp(28px,4vw,48px);border-top:1px solid var(--line);
}
@media (min-width:768px){
  .chapter{grid-template-columns:120px minmax(0,1fr);gap:36px}
}
.chapter__num{
  font:900 clamp(40px,6.4vw,80px)/.88 var(--font-display);letter-spacing:-.03em;
  color:transparent;-webkit-text-stroke:1px var(--line);
  font-variant-numeric:tabular-nums;
}
.chapter__num--solid{color:var(--amber);-webkit-text-stroke:0}
.chapter__kicker{
  font:500 12px/1 var(--font-mono);letter-spacing:.16em;color:var(--amber);
  text-transform:uppercase;margin-bottom:12px;
}
.chapter__title{font:800 clamp(24px,3.2vw,36px)/1.2 var(--font-display);color:var(--hi)}
.chapter__body{margin-top:18px}
.lede{max-width:38em;font-size:clamp(17px,1.9vw,20px);line-height:1.7;color:var(--hi)}

.prose{max-width:38em;font-size:17px;line-height:1.75;color:var(--hi)}
.prose p + p{margin-top:1.1em}
.prose h3{margin:1.7em 0 .6em;font-size:20px;color:var(--amber)}
.prose a{border-bottom:1px solid rgba(63,227,210,.5)}
.prose a:hover{border-color:var(--amber)}
.prose ul,.prose ol{margin:1em 0;padding-left:1.15em}
.prose li{margin:.45em 0}
.prose strong{color:#FFFFFF;font-weight:700}

/* ---------- 奶油纸面板 ---------- */
.paper{
  background:var(--paper);color:var(--paper-ink);
  padding:clamp(24px,4vw,44px);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.paper h1,.paper h2,.paper h3,.paper h4{color:var(--paper-ink)}
.paper .prose{color:var(--paper-ink)}
.paper .prose h3{color:var(--paper-accent)}
.paper .prose strong{color:#120E0B}
.paper a{color:var(--paper-accent)}
.paper a:hover{color:#7A2A0B}
.paper .tag{border-color:rgba(34,28,24,.22);background:rgba(34,28,24,.05);color:#3A3129}
.paper .card__meta{color:rgba(34,28,24,.62)}

/* ---------- 卡片 ---------- */
.card{
  position:relative;display:flex;flex-direction:column;gap:14px;
  padding:clamp(20px,2.4vw,28px);
  background:var(--ink-800);border:1px solid var(--line);color:var(--hi);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:border-color .24s ease,transform .24s ease;
}
.card:hover{border-color:#3C4C8A}
.card--paper{background:var(--paper);color:var(--paper-ink);border-color:transparent}
.card--paper .card__title{color:var(--paper-ink)}
.card--amber{
  border-color:rgba(255,177,59,.45);
  background:linear-gradient(140deg,rgba(255,177,59,.16),rgba(19,28,70,.92) 62%);
}
.card--square{clip-path:none}
.card__head{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.card__title{font:700 clamp(18px,2.1vw,22px)/1.35 var(--font-sub);color:var(--hi)}
.card__meta{font:500 12px/1.5 var(--font-mono);letter-spacing:.05em;color:var(--mute)}
.card__body{font-size:16px;line-height:1.7;color:inherit}
.card__foot{
  margin-top:auto;padding-top:14px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  border-top:1px solid rgba(42,54,104,.9);
}
.card--paper .card__foot{border-top-color:rgba(34,28,24,.16)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;
  border:1px solid rgba(63,227,210,.5);background:rgba(63,227,210,.08);color:var(--cyan);
  font:500 12px/1.4 var(--font-mono);letter-spacing:.06em;
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.tag--amber{color:var(--amber);border-color:rgba(255,177,59,.5);background:rgba(255,177,59,.1)}
.tag--flame{color:#FF8A63;border-color:rgba(255,107,61,.5);background:rgba(255,107,61,.12)}
.tag--mute{color:var(--mute);border-color:var(--line);background:transparent}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid var(--amber);background:var(--amber);color:var(--ink-900);
  font:700 15px/1 var(--font-sub);letter-spacing:.02em;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:hover{background:#FFC466;border-color:#FFC466;color:var(--ink-900);transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--cyan)}
.btn--ghost:hover{background:var(--cyan);border-color:var(--cyan);color:var(--ink-900)}
.btn--quiet{background:transparent;border-color:var(--line);color:var(--mute)}
.btn--quiet:hover{background:rgba(168,176,218,.1);border-color:var(--mute);color:var(--hi);transform:none}
.btn--sm{padding:9px 14px;font-size:13px}

/* ---------- 提示条 ---------- */
.callout{
  display:flex;flex-wrap:wrap;gap:14px;padding:16px 18px;
  background:rgba(19,28,70,.85);border:1px solid var(--line);border-left:3px solid var(--cyan);
  font-size:15.5px;line-height:1.7;color:var(--hi);
}
.callout--info{border-left-color:var(--amber);background:rgba(255,177,59,.08)}
.callout--warn{border-left-color:var(--flame);background:rgba(255,107,61,.1)}
.callout__label{
  font:500 12px/1.6 var(--font-mono);letter-spacing:.1em;color:var(--amber);white-space:nowrap;
}
.callout--warn .callout__label{color:var(--flame)}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);background:var(--ink-800)}
.table{width:100%;min-width:560px;border-collapse:collapse;font-size:15px}
.table caption{
  caption-side:top;text-align:left;padding:12px 16px;
  font:500 12px/1.5 var(--font-mono);letter-spacing:.06em;color:var(--mute);
  border-bottom:1px solid var(--line);
}
.table th,.table td{padding:12px 16px;text-align:left;vertical-align:top;border-bottom:1px solid rgba(42,54,104,.8)}
.table th{font:700 13px/1.5 var(--font-sub);letter-spacing:.06em;color:var(--amber);background:rgba(11,18,48,.6)}
.table td{color:var(--hi);line-height:1.65}
.table tbody tr:hover{background:rgba(63,227,210,.05)}
.table tbody tr:last-child td{border-bottom:0}

/* ---------- 面包屑 ---------- */
.crumbs{padding-top:20px}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs__item{
  display:inline-flex;align-items:center;
  font:500 12px/1.4 var(--font-mono);letter-spacing:.05em;color:var(--mute);
}
.crumbs__item + .crumbs__item::before{content:"/";margin-right:8px;color:var(--line)}
.crumbs__link{color:var(--mute)}
.crumbs__link:hover{color:var(--cyan)}
.crumbs__current{color:var(--hi)}

/* ---------- 图片容器（页面阶段放置截图或内联 SVG） ---------- */
.media{
  position:relative;overflow:hidden;display:block;
  background:var(--ink-800);border:1px solid var(--line);aspect-ratio:16/10;
  clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));
}
.media img,.media svg,.media video{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--portrait{aspect-ratio:4/5}
.media__ph{
  display:grid;place-items:center;height:100%;
  font:500 12px/1 var(--font-mono);letter-spacing:.12em;color:var(--line);
}
.media__cap{
  display:block;margin-top:10px;
  font:500 12px/1.6 var(--font-mono);letter-spacing:.04em;color:var(--mute);
}

/* ---------- 滚动目录跟随 ---------- */
[data-spy-link][aria-current="true"]{color:var(--cyan)}

/* ---------- 显现动效 ---------- */
.has-js [data-reveal]{
  opacity:0;transform:translate3d(-16px,0,0);
  transition:opacity .52s ease,transform .52s cubic-bezier(.22,.61,.36,1);
}
.has-js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 移动端抽屉 ---------- */
@media (max-width:1023px){
  .topbar__brand{display:block}
  .topbar__sub{display:none}
  .rail{
    width:min(304px,84vw);
    align-items:stretch;gap:14px;padding:72px 16px 20px;
    transform:translateX(-104%);
    transition:transform .28s cubic-bezier(.22,.61,.36,1);
    box-shadow:24px 0 60px rgba(0,0,0,.46);
    overflow-y:auto;
  }
  .rail[data-open]{transform:translateX(0)}
  .rail__brand{flex-direction:row;align-items:center;gap:12px;padding:0 0 16px;text-align:left}
  .rail__brand-text{align-items:flex-start;text-align:left;gap:5px}
  .rail__brand-name{font-size:17px}
  .rail__brand-sub{font-size:11px;letter-spacing:.12em}
  .rail__nav{overflow:visible;padding:0}
  .rail__list{align-items:stretch;gap:4px}
  .rail__link{flex-direction:row;align-items:center;gap:14px;padding:12px 14px;border:1px solid transparent}
  .rail__link[aria-current="page"]{background:rgba(63,227,210,.08);border-color:rgba(63,227,210,.35)}
  .rail__link[aria-current="page"]::before{display:none}
  .rail__label{writing-mode:horizontal-tb;font-size:16px;letter-spacing:.04em}
  .rail__num{font-size:11px;opacity:.9}
  .rail__foot{flex-direction:row;align-items:center;justify-content:space-between;padding-top:14px}
  .rail__top{animation:none}
  body.nav-open{overflow:hidden}
}

@media (min-width:640px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .topbar{left:var(--rail-w);padding:0 28px}
  .status-panel{right:28px}
  .footer__grid{grid-template-columns:1.5fr .85fr .95fr .8fr;gap:40px}
  .footer__inner{width:min(100% - 72px,var(--wrap))}
  .wrap{width:min(100% - 72px,var(--wrap))}
}

/* 低高度桌面：压缩轨道 */
@media (min-width:1024px) and (max-height:780px){
  .rail__brand{padding:12px 6px 10px}
  .rail__link{padding:8px 4px;gap:5px}
  .rail__label{font-size:12px}
  .rail__stamp{display:none}
}

/* ---------- 无障碍：减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .has-js [data-reveal].is-in{opacity:1;transform:none}
}