/* =========================================================================
   英亚平台主站 · /assets/site.css
   共享外壳：侧边轨道导航 + 页脚 + 通用组件
   ========================================================================= */

/* ---------- 01 变量 ---------- */
:root{
  --ink:#16202B;
  --ink-2:#2C3A47;
  --wash:#E8EDF1;
  --paper:#FBF9F5;
  --copper:#C2622A;
  --copper-deep:#A8521F;
  --copper-soft:#F0D9C6;
  --mint:#3E8F76;
  --mint-deep:#2E6E5A;
  --mint-soft:#DFF0E9;
  --amber:#E0A32E;
  --amber-deep:#8A6414;
  --amber-soft:#FBEBCB;
  --graphite:#5A6572;
  --line:#CBD4DC;
  --alert:#9B3B2E;

  --rail-w:120px;
  --bar-h:60px;
  --shell:1180px;
  --gap-s:24px;
  --gap-m:32px;
  --gap-l:48px;

  --ease:cubic-bezier(.2,.7,.2,1);
  --rail-line:#26323D;

  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-head);
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shadow-none:none;
}

/* ---------- 02 reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{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;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--copper);outline-offset:3px}

/* ---------- 03 中文排版基底 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.005em;
  padding-left:var(--rail-w);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);font-weight:800;line-height:1.26;letter-spacing:-.02em;color:var(--ink)}
p{max-width:76ch}
strong{font-weight:800}
small{font-size:13px;color:var(--graphite)}
.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.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}
.skip-link{
  position:fixed;left:10px;top:10px;z-index:300;
  display:inline-block;padding:10px 16px;
  background:var(--copper);color:#FFF8F2;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  transform:translateY(-200%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 04 内容容器 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gap-m)}
.shell--wide{max-width:1360px}
.shell--narrow{max-width:820px}

.sec{padding:var(--gap-l) 0}
.sec--tight{padding:var(--gap-m) 0}
.band{
  background:var(--wash);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:var(--gap-l) 0;
}
.band--ink{background:var(--ink);border-color:var(--ink);color:#D5DEE6}
.band--ink h1,.band--ink h2,.band--ink h3{color:var(--paper)}
.band--copper{background:var(--copper-soft);border-color:#E4C4A8}
.texture-lines{background-image:repeating-linear-gradient(to bottom,rgba(203,212,220,.55) 0 1px,transparent 1px 28px)}
.rule{height:1px;border:0;background:var(--line);margin:var(--gap-m) 0}

/* ---------- 05 排版刻度 ---------- */
.t-display{font-size:clamp(42px,7vw,104px);font-weight:900;line-height:.98;letter-spacing:-.045em}
.t-xl{font-size:clamp(28px,3.4vw,44px);font-weight:900;line-height:1.14}
.t-lg{font-size:clamp(22px,2.2vw,30px);font-weight:800}
.t-md{font-size:20px;font-weight:800}
.t-sm{font-size:17px;font-weight:700}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--copper-deep);line-height:1.6}
.lede{font-size:19px;line-height:1.8;color:var(--ink-2);font-weight:400;max-width:62ch}
.prose{color:var(--ink-2)}
.prose p{margin-bottom:18px;font-size:16.5px;line-height:1.8;max-width:68ch}
.prose h2{margin:var(--gap-m) 0 14px;font-size:24px}
.prose h3{margin:var(--gap-s) 0 10px;font-size:19px}
.prose ul{margin:0 0 18px;padding-left:0;max-width:68ch}
.prose ul li{position:relative;padding-left:20px;margin-bottom:8px;font-size:16px;line-height:1.75}
.prose ul li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:1px;background:var(--copper)}
.prose--senior{font-size:18px;line-height:1.95}

.note{
  font-size:13.5px;line-height:1.7;color:var(--copper-deep);
  border-top:1px dashed var(--copper-soft);
  padding-top:10px;transform:rotate(-.6deg);font-style:italic;
}

/* ---------- 06 侧边轨道（页头） ---------- */
.site-rail{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--rail-w);
  z-index:60;
  display:flex;flex-direction:column;gap:20px;
  padding:20px 14px 18px;
  background:var(--ink);
  color:#C2CDD6;
  border-right:1px solid var(--rail-line);
  overflow:hidden;
}
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%}

.rail-brand{display:flex;flex-direction:column;gap:9px;min-width:0}
.rail-brand__mark{
  display:block;width:22px;height:22px;background:var(--copper);position:relative;flex:0 0 auto;
}
.rail-brand__mark::before{content:"";position:absolute;top:6px;right:6px;width:10px;height:1.5px;background:var(--ink)}
.rail-brand__mark::after{content:"";position:absolute;bottom:6px;left:6px;width:1.5px;height:10px;background:var(--ink)}
.rail-brand__text{display:block;min-width:0}
.rail-brand__name{display:block;font-size:16px;font-weight:900;letter-spacing:.06em;line-height:1.2;color:var(--paper)}
.rail-brand__sub{display:block;margin-top:5px;font-size:10px;line-height:1.6;letter-spacing:.06em;color:#7E8E9C}

.rail-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 11px;
  border:1px solid rgba(251,249,245,.26);
  color:var(--paper);font-size:12px;letter-spacing:.14em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.rail-toggle:hover{border-color:var(--copper);color:#FFF3E9}
.rail-toggle__bars{position:relative;display:block;width:18px;height:12px}
.rail-toggle__bars::before,
.rail-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:currentColor;
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.rail-toggle__bars::before{top:1px}
.rail-toggle__bars::after{top:9px}
.site-rail[data-open] .rail-toggle__bars::before{top:5px;transform:rotate(45deg)}
.site-rail[data-open] .rail-toggle__bars::after{top:5px;transform:rotate(-45deg)}

.rail-nav{
  flex:1 1 auto;min-height:0;overflow-y:auto;
  scrollbar-width:thin;scrollbar-color:#3A4754 transparent;
}
.rail-nav__list{counter-reset:rail;display:flex;flex-direction:column;gap:2px}
.rail-nav__list li{counter-increment:rail}
.rail-nav__link{
  display:flex;align-items:flex-start;gap:7px;
  padding:9px 8px 9px 10px;
  font-size:12.5px;line-height:1.5;
  color:#93A4B2;
  border-left:2px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.rail-nav__link::before{
  content:counter(rail,decimal-leading-zero);
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:9.5px;line-height:2;
  color:#5A6572;letter-spacing:0;
}
.rail-nav__link:hover{color:var(--paper);background:rgba(232,237,241,.07)}
.rail-nav__link[aria-current="page"]{
  color:var(--paper);
  font-weight:700;
  background:rgba(194,98,42,.18);
  border-left-color:var(--copper);
}
.rail-nav__link[aria-current="page"]::before{color:var(--copper)}
.rail-nav__hint{
  margin-top:16px;padding-top:14px;
  border-top:1px solid var(--rail-line);
  font-size:10.5px;line-height:1.7;letter-spacing:.04em;color:#7E8E9C;max-width:none;
}

.rail-cta{display:flex;flex-direction:column;gap:8px}
.rail-legend{
  display:flex;flex-direction:column;gap:7px;
  padding-top:14px;border-top:1px solid var(--rail-line);
  font-size:10.5px;letter-spacing:.04em;color:#8A99A6;
}
.status-dot{display:flex;align-items:center;gap:6px}
.status-dot i{display:block;width:8px;height:8px;flex:0 0 auto;background:var(--graphite)}
.status-dot--done i{background:var(--mint)}
.status-dot--pending i{background:var(--amber)}
.status-dot--action i{background:var(--copper)}
.rail-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--rail-line);
  display:flex;flex-direction:column;gap:2px;
}
.rail-foot__num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:700;line-height:1.1;letter-spacing:-.02em;color:var(--copper);
}
.rail-foot__label{font-size:10.5px;letter-spacing:.06em;color:#7E8E9C}

.rail-progress{
  position:absolute;top:0;right:0;width:3px;height:100%;
  background:var(--copper);
  transform-origin:top center;
  transform:scaleY(var(--p,0));
  pointer-events:none;z-index:5;
}

/* ---------- 07 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1.3;
  border:1px solid transparent;border-radius:0;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--copper{background:var(--copper);border-color:var(--copper);color:#FFF8F2}
.btn--copper:hover{background:var(--copper-deep);border-color:var(--copper-deep)}
.btn--ink{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn--ink:hover{background:var(--ink-2);border-color:var(--ink-2)}
.btn--quiet{background:var(--copper-soft);border-color:#E4C4A8;color:var(--copper-deep)}
.btn--quiet:hover{background:#E7C9AE}
.btn--ghost{background:transparent;border-color:rgba(251,249,245,.3);color:var(--paper)}
.btn--ghost:hover{border-color:var(--copper);color:#FFF3E9}
.btn--block{width:100%}

/* ---------- 08 网格 ---------- */
.grid{display:grid;gap:var(--gap-m)}
.grid--split{grid-template-columns:minmax(0,62fr) minmax(0,30fr);gap:var(--gap-l)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1080px){
  .grid--split{grid-template-columns:minmax(0,1fr);gap:var(--gap-m)}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:820px){
  .grid--3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .grid--2,.grid--4{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 09 卡片 / 数据 / 标签 ---------- */
.card{
  display:flex;flex-direction:column;gap:12px;
  padding:24px;
  background:var(--paper);
  border:1px solid var(--line);border-radius:0;
}
.card--wash{background:var(--wash)}
.card--ink{background:var(--ink);border-color:var(--ink);color:#C2CDD6}
.card--ink .card__title{color:var(--paper)}
.card__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding-bottom:12px;border-bottom:1px solid var(--line);
}
.card__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--graphite)}
.card__title{font-size:19px;font-weight:800}
.card__body,.card__text{font-size:15px;line-height:1.72;color:var(--ink-2)}

.stat{display:flex;flex-direction:column;gap:4px;padding:18px 0;border-top:1px solid var(--line)}
.stat__num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:34px;font-weight:700;line-height:1.1;letter-spacing:-.02em;color:var(--copper-deep);
}
.stat__num--outline{-webkit-text-stroke:1px var(--copper);color:transparent}
.stat__unit{font-size:13px;color:var(--graphite);margin-left:4px}
.stat__label{font-size:13px;letter-spacing:.06em;color:var(--graphite)}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;font-size:12px;font-weight:600;letter-spacing:.06em;
  border:1px solid var(--line);background:#fff;color:var(--graphite);
}
.chip--done{background:var(--mint-soft);border-color:#BFE0D4;color:var(--mint-deep)}
.chip--pending{background:var(--amber-soft);border-color:#F0D9A0;color:var(--amber-deep)}
.chip--action{background:var(--copper-soft);border-color:#E4C4A8;color:var(--copper-deep)}
.chip--alert{background:#F7E4E0;border-color:#E6C0B8;color:var(--alert)}
.tag{
  display:inline-block;padding:3px 8px;
  font-size:11.5px;letter-spacing:.08em;color:var(--graphite);
  border:1px solid var(--line);background:var(--paper);
}

/* ---------- 10 流程条 / 通栏面板 ---------- */
.flow{
  display:grid;grid-auto-flow:column;grid-auto-columns:1fr;
  border:1px solid var(--line);background:var(--paper);
}
.flow__step{padding:18px 20px;border-right:1px solid var(--line);min-width:0}
.flow__step:last-child{border-right:0}
.flow__idx{display:block;margin-bottom:6px;font-family:var(--font-mono);font-size:12px;color:var(--copper)}
.flow__title{font-size:16px;font-weight:800;line-height:1.4}
.flow__text{margin-top:6px;font-size:13.5px;line-height:1.68;color:var(--graphite)}
@media (max-width:820px){
  .flow{grid-auto-flow:row;grid-auto-columns:auto}
  .flow__step{border-right:0;border-bottom:1px solid var(--line)}
  .flow__step:last-child{border-bottom:0}
}

.panel{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;
  padding:22px 24px;
  background:var(--paper);
  border:1px solid var(--line);border-left:4px solid var(--copper);border-radius:0;
}
.panel--done{border-left-color:var(--mint)}
.panel--pending{border-left-color:var(--amber)}
.panel--alert{border-left-color:var(--alert)}
.panel__k{font-size:12px;letter-spacing:.12em;color:var(--graphite)}
.panel__v{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:22px;font-weight:700;color:var(--ink)}
@media (max-width:640px){
  .panel{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 11 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.04em;color:var(--graphite);
}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--copper-deep);text-decoration:underline;text-underline-offset:3px}
.crumb__sep{color:var(--line)}

/* ---------- 12 粘性小节索引 ---------- */
.toc{position:sticky;top:32px;padding-top:14px;border-top:2px solid var(--ink);font-size:13.5px}
.toc__title{margin-bottom:10px;font-size:12px;letter-spacing:.12em;color:var(--graphite);font-weight:700}
.toc__link{
  display:block;padding:7px 0 7px 12px;
  border-left:2px solid var(--line);color:var(--graphite);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc__link:hover{color:var(--ink)}
.toc__link.is-current,
.toc__link[aria-current]{border-left-color:var(--copper);color:var(--ink);font-weight:700}

/* ---------- 13 折叠问答组 ---------- */
.acc{border-top:1px solid var(--line)}
.acc__item{border-bottom:1px solid var(--line)}
.acc__h{margin:0;font-size:inherit}
.acc__trigger{
  display:flex;width:100%;align-items:flex-start;gap:14px;text-align:left;
  padding:16px 4px;font-size:16.5px;font-weight:700;line-height:1.55;color:var(--ink);
  transition:color .18s var(--ease);
}
.acc__trigger:hover{color:var(--copper-deep)}
.acc__idx{flex:0 0 auto;padding-top:4px;font-family:var(--font-mono);font-size:12px;color:var(--copper)}
.acc__sign{position:relative;flex:0 0 auto;width:14px;height:14px;margin-top:6px;margin-left:auto}
.acc__sign::before,
.acc__sign::after{content:"";position:absolute;background:var(--ink-2)}
.acc__sign::before{left:0;top:6px;width:14px;height:1.5px}
.acc__sign::after{left:6px;top:0;width:1.5px;height:14px;transition:transform .24s var(--ease)}
.acc__trigger[aria-expanded="true"] .acc__sign::after{transform:scaleY(0)}
.acc__panel{
  padding:0 4px 20px 34px;
  font-size:15.5px;line-height:1.8;color:var(--ink-2);
  animation:accIn .22s var(--ease) both;
}
.acc__panel[hidden]{display:none}
@keyframes accIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .acc__panel{animation:none}
  .acc__sign::after{transition:none}
}

/* ---------- 14 图片容器 ---------- */
.media{
  position:relative;overflow:hidden;
  background:var(--wash);
  border:1px solid var(--line);
  aspect-ratio:4/3;
}
.media img{width:100%;height:100%;object-fit:cover;object-position:center}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--placeholder{
  background-image:repeating-linear-gradient(45deg,rgba(203,212,220,.6) 0 1px,transparent 1px 10px);
}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 12px;
  background:linear-gradient(to top,rgba(22,32,43,.72),rgba(22,32,43,0));
  color:#F1F5F8;font-size:12px;letter-spacing:.04em;
}
.media__note{
  position:absolute;right:10px;bottom:10px;
  padding:4px 8px;
  background:var(--copper-soft);border:1px solid #E4C4A8;color:var(--copper-deep);
  font-size:12px;line-height:1.5;transform:rotate(-1.2deg);
}

/* ---------- 15 进入视口 ---------- */
.has-js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.has-js [data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .has-js [data-reveal]{opacity:1;transform:none;transition:none}
}

/* ---------- 16 页脚 ---------- */
.site-foot{
  background:var(--ink);
  color:#AEBDC8;
  border-top:3px solid var(--copper);
}
.site-foot__top{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));
  gap:40px;
  padding:56px 0 40px;
}
.site-foot__name{font-size:20px;font-weight:900;letter-spacing:.02em;color:var(--paper);line-height:1.3}
.site-foot__tag{margin-top:8px;font-size:12px;letter-spacing:.14em;color:var(--copper)}
.site-foot__summary{margin-top:18px;max-width:38ch;font-size:14.5px;line-height:1.85;color:#93A4B2}
.site-foot__title{
  margin-bottom:16px;padding-bottom:10px;
  border-bottom:1px solid var(--rail-line);
  font-size:12px;font-weight:700;letter-spacing:.14em;color:#7E8E9C;
}
.site-foot__list li{margin:0}
.site-foot__list a{
  display:block;padding:7px 0;
  font-size:14.5px;line-height:1.6;color:#C2CDD6;
  transition:color .18s var(--ease);
}
.site-foot__list a:hover{color:var(--copper);text-decoration:underline;text-underline-offset:3px}
.site-foot__contact{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
  padding:24px 0;
  border-top:1px solid var(--rail-line);
  border-bottom:1px solid var(--rail-line);
}
.site-foot__cell{display:flex;flex-direction:column;gap:6px;min-width:0}
.site-foot__ck{font-size:11.5px;letter-spacing:.12em;color:#7E8E9C}
.site-foot__cv{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:14.5px;line-height:1.6;color:#E8EDF1;
  word-break:break-word;
}
.site-foot__end{padding:22px 0 40px}
.site-foot__legal{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center}
.site-foot__legal a{
  font-size:13px;color:#AEBDC8;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.site-foot__legal a:hover{color:var(--copper);border-bottom-color:var(--copper)}
.site-foot__meta{margin-top:14px;font-size:12.5px;color:#7E8E9C;letter-spacing:.03em}
.site-foot__footnote{margin-top:8px;max-width:64ch;font-size:12.5px;line-height:1.75;color:#6E7E8C}

@media (max-width:980px){
  .site-foot__top{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .site-foot__brand{grid-column:1 / -1;margin-bottom:8px}
}
@media (max-width:700px){
  .site-foot__contact{grid-template-columns:minmax(0,1fr);gap:16px}
}
@media (max-width:560px){
  .site-foot__top{grid-template-columns:minmax(0,1fr);padding-top:40px}
}

/* ---------- 17 移动端：轨道收进抽屉 ---------- */
@media (max-width:1023px){
  body{padding-left:0;padding-top:var(--bar-h)}
  body.is-nav-open{overflow:hidden}

  .site-rail{
    right:0;bottom:auto;width:100%;height:var(--bar-h);
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:0 14px;overflow:visible;
    border-right:0;border-bottom:1px solid var(--rail-line);
  }
  .rail-head{flex:1 1 auto}
  .rail-brand{flex-direction:row;align-items:center;gap:10px}
  .rail-brand__mark{width:20px;height:20px}
  .rail-brand__mark::before{top:5px;right:5px;width:9px}
  .rail-brand__mark::after{bottom:5px;left:5px;height:9px}
  .rail-brand__name{font-size:15px}
  .rail-brand__sub{display:none}

  .rail-nav{
    position:fixed;top:var(--bar-h);left:0;bottom:0;
    width:min(320px,84vw);
    flex:none;min-height:0;
    padding:20px 18px 132px;
    background:var(--paper);color:var(--ink);
    border-right:1px solid var(--line);
    transform:translateX(-102%);
    transition:transform .28s var(--ease);
    overflow-y:auto;
    z-index:70;
  }
  .site-rail[data-open] .rail-nav{transform:translateX(0)}
  .site-rail[data-open]::after{
    content:"";position:fixed;left:0;right:0;top:var(--bar-h);bottom:0;
    background:rgba(22,32,43,.55);
    z-index:65;
  }
  .rail-nav__list{gap:0}
  .rail-nav__link{
    padding:13px 10px 13px 12px;
    font-size:16px;font-weight:600;
    color:var(--ink-2);
    border-left:3px solid transparent;
    border-bottom:1px solid var(--line);
  }
  .rail-nav__link::before{font-size:11px;line-height:2.2;color:var(--graphite)}
  .rail-nav__link:hover{background:var(--wash);color:var(--ink)}
  .rail-nav__link[aria-current="page"]{background:var(--copper-soft);color:var(--copper-deep);border-left-color:var(--copper)}
  .rail-nav__hint{margin-top:20px;color:var(--graphite);border-top-color:var(--line)}

  .rail-cta{
    position:fixed;left:0;bottom:0;
    width:min(320px,84vw);
    padding:14px 18px;
    background:var(--paper);
    border-top:1px solid var(--line);
    transform:translateX(-102%);
    transition:transform .28s var(--ease);
    z-index:75;
  }
  .site-rail[data-open] .rail-cta{transform:translateX(0)}
  .rail-cta .btn--ghost{color:var(--ink-2);border-color:var(--line)}
  .rail-cta .btn--ghost:hover{color:var(--copper-deep);border-color:var(--copper)}

  .rail-legend,.rail-foot{display:none}

  .rail-progress{
    top:auto;bottom:-1px;left:0;right:0;width:auto;height:3px;
    transform-origin:left center;
    transform:scaleX(var(--p,0));
  }
  .write-only-print{display:none}
}

@media (max-width:640px){
  body{--gap-l:32px;--gap-m:24px}
  .shell{padding:0 18px}
  .t-display{font-size:clamp(36px,10vw,58px)}
  .lede{font-size:17px}
  .card{padding:20px}
  .panel{padding:18px}
}

/* ---------- 18 打印 ---------- */
@media print{
  .site-rail,.rail-progress,.skip-link{display:none}
  body{padding:0}
  .site-foot{background:#fff;color:#16202B;border-top:1px solid #16202B}
}