/* ============================================================
   开博体育 / KAIBO PLAY — 共享站点样式 /assets/site.css
   夜间赛场 · 技术蓝图 · 侧边轨道
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#07111F;
  --ink-2:#0C1B2E;
  --ink-3:#091625;
  --line:#1C3550;
  --cyan:#35F2E0;
  --orange:#FF7A2F;
  --green:#3DDC84;
  --red:#FF4D5E;
  --violet:#7B61FF;
  --paper:#F2F7FA;
  --mute:#8CA3B8;

  --rail-w:284px;
  --cut:22px;
  --wrap:1160px;

  --font-display:"Oswald","Arial Narrow","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",Georgia,serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"SFMono-Regular","JetBrains Mono","Roboto Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,.68,.28,1);
  --shadow:0 18px 42px rgba(0,0,0,.38);
  --shadow-soft:0 10px 26px rgba(0,0,0,.28);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  background-color:var(--ink);
}
body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 84% -8%, rgba(53,242,224,.10), transparent 68%),
    radial-gradient(760px 480px at 2% 104%, rgba(123,97,255,.12), transparent 70%),
    linear-gradient(to right, rgba(28,53,80,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28,53,80,.5) 1px, transparent 1px);
  background-size:auto,auto,72px 72px,72px 72px;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  background-position:0 0,0 0,0 0,0 0;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video,canvas{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit}
hr{border:0;border-top:1px solid var(--line);margin:2rem 0}
::selection{background:rgba(53,242,224,.28);color:#fff}

/* ---------- 3. 中文排版与标题 ---------- */
h1,h2,h3,h4,h5{
  margin:0 0 .62em;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.12;
  letter-spacing:.01em;
  color:var(--paper);
  text-wrap:balance;
}
h1{font-size:clamp(2rem,4.6vw,3rem)}
h2{font-size:clamp(1.55rem,3.2vw,2.15rem)}
h3{font-size:clamp(1.2rem,2.2vw,1.5rem)}
p{margin:0 0 1.05em}
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.4rem,7vw,4.4rem);
  line-height:1.02;
  letter-spacing:.005em;
  transform:skewX(-4deg);
  transform-origin:left center;
}
.display--left{transform-origin:left center}
.serif{
  font-family:var(--font-serif);
  font-weight:600;
  letter-spacing:.02em;
}
.label{
  display:block;
  margin:0 0 .5rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mute);
}
.prose{max-width:68ch;font-size:1.02rem;line-height:1.82;color:#C6D8E6}
.prose p{margin:0 0 1.15em}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(53,242,224,.4)}
.prose a:hover{border-bottom-color:var(--cyan)}

/* ---------- 4. 布局容器与网格 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}
.site-main{position:relative;display:block}
.grid{display:grid;gap:18px}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid{gap:22px}
}

/* ---------- 5. 面板 · 切角 · 状态 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.6vw,26px);
  background:linear-gradient(158deg,#0C1B2E 0%,#091625 100%);
  border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
}
.panel--cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}
.cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}
.panel::before{
  content:"";
  position:absolute;left:0;top:14px;
  width:3px;height:26px;
  background:linear-gradient(180deg,var(--cyan),transparent);
}
.dot{
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 0 rgba(61,220,132,.45);
  animation:pulse 2.6s var(--ease) infinite;
  flex:0 0 auto;
}
.dot--green{background:var(--green);box-shadow:0 0 0 0 rgba(61,220,132,.45)}
.dot--orange{background:var(--orange);box-shadow:0 0 0 0 rgba(255,122,47,.45);animation-delay:.6s}
.dot--red{background:var(--red);box-shadow:0 0 0 0 rgba(255,77,94,.45);animation-delay:.3s}
.dot--cyan{background:var(--cyan);box-shadow:0 0 0 0 rgba(53,242,224,.45)}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(53,242,224,.35)}
  70%{box-shadow:0 0 0 8px rgba(53,242,224,0)}
  100%{box-shadow:0 0 0 0 rgba(53,242,224,0)}
}
.tag{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.26rem .62rem;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mute);
  background:rgba(28,53,80,.4);
  border:1px solid var(--line);
}
.tag--cyan{color:var(--cyan);border-color:rgba(53,242,224,.45);background:rgba(53,242,224,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,47,.45);background:rgba(255,122,47,.08)}
.tag--violet{color:var(--violet);border-color:rgba(123,97,255,.5);background:rgba(123,97,255,.1)}
.tag--green{color:var(--green);border-color:rgba(61,220,132,.45);background:rgba(61,220,132,.08)}
.tag--red{color:var(--red);border-color:rgba(255,77,94,.45);background:rgba(255,77,94,.08)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.8rem 1.15rem;
  font-family:var(--font-body);
  font-size:.92rem;font-weight:700;letter-spacing:.07em;line-height:1;
  color:var(--paper);
  text-decoration:none;
  background:rgba(12,27,46,.9);
  border:1px solid var(--line);
  border-radius:0;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:hover{transform:translateY(-2px);border-color:rgba(53,242,224,.6);color:#fff}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:#04141A}
.btn--primary:hover{background:#5FF8E9;border-color:#5FF8E9;color:#04141A;box-shadow:0 10px 26px rgba(53,242,224,.25)}
.btn--orange{background:var(--orange);border-color:var(--orange);color:#1A0B03}
.btn--orange:hover{background:#FF9155;border-color:#FF9155;color:#1A0B03;box-shadow:0 10px 26px rgba(255,122,47,.24)}
.btn--ghost{background:transparent;color:var(--paper)}
.btn--ghost:hover{background:rgba(53,242,224,.08)}
.btn--sm{padding:.52rem .72rem;font-size:.76rem;letter-spacing:.1em}

/* ---------- 7. 媒体容器（页面阶段放图） ---------- */
.media{
  position:relative;
  overflow:hidden;
  display:block;
  aspect-ratio:16/9;
  background:
    linear-gradient(135deg,#0C1B2E 0%,#122A45 55%,#0A1A2C 100%);
  border:1px solid var(--line);
}
.media img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.06);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(53,242,224,.07) 0 1px,transparent 1px 3px);
  opacity:.55;
  mix-blend-mode:screen;
}
.media__caption{
  position:absolute;left:0;bottom:0;
  padding:.35rem .7rem;
  font-family:var(--font-mono);
  font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--paper);
  background:rgba(7,17,31,.82);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
  z-index:2;
}
.media__badge{
  position:absolute;top:0;right:0;z-index:2;
  padding:.35rem .7rem;
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;
  background:var(--cyan);color:#04141A;
}

/* ---------- 8. 面包屑与章节头 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  padding-block:18px 6px;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.1em;
  color:var(--mute);
}
.crumbs a{
  color:var(--mute);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.crumbs a:hover{color:var(--cyan);border-bottom-color:rgba(53,242,224,.5)}
.crumbs li+li::before{content:"/";margin-right:.5rem;color:var(--line)}
.crumbs [aria-current="page"]{color:var(--paper)}
.chapter{
  display:flex;align-items:baseline;gap:14px;
  margin-bottom:18px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.chapter__index{
  font-family:var(--font-mono);
  font-size:.76rem;letter-spacing:.2em;
  color:var(--cyan);
}
.chapter__title{
  margin:0;
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(1.15rem,2.4vw,1.5rem);
  letter-spacing:.02em;
  color:var(--paper);
}

/* ---------- 9. 显现动画 ---------- */
@media (prefers-reduced-motion:no-preference){
  [data-reveal]{
    opacity:0;
    transform:translateY(20px);
    transition:opacity .5s var(--ease),transform .5s var(--ease);
    will-change:opacity,transform;
  }
  [data-reveal].is-visible{opacity:1;transform:none}
}

/* ---------- 10. 跳转链接与焦点 ---------- */
.skip-link{
  position:fixed;
  top:-70px;left:14px;
  z-index:200;
  padding:.65rem 1rem;
  font-size:.85rem;font-weight:700;letter-spacing:.06em;
  color:#04141A;background:var(--cyan);
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

/* ---------- 11. 头部 · 阅读进度 ---------- */
.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  background:rgba(28,53,80,.65);
  z-index:95;
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--orange));
  transition:width .12s linear;
}
.read-progress[data-complete] .read-progress__bar{box-shadow:0 0 12px rgba(53,242,224,.7)}

/* ---------- 12. 头部 · 结构 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,17,31,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.rail{width:100%}
.rail__head{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 16px;
}

/* 品牌 */
.brand{
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;color:var(--paper);
}
.brand__mark{
  display:grid;place-items:center;
  width:38px;height:38px;flex:0 0 auto;
  font-family:var(--font-display);
  font-size:.92rem;font-weight:900;letter-spacing:.02em;
  color:#04141A;
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.brand:hover .brand__mark{background:var(--orange);color:#1A0B03}
.brand__text{display:block}
.brand__cn{
  display:block;
  font-family:var(--font-display);
  font-size:1.05rem;font-weight:900;letter-spacing:.08em;line-height:1.1;
}
.brand__en{
  display:block;
  font-family:var(--font-mono);
  font-size:.6rem;letter-spacing:.26em;
  color:var(--mute);
}

/* 移动菜单按钮 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:.52rem .72rem;
  font-family:var(--font-body);
  font-size:.76rem;font-weight:700;letter-spacing:.16em;
  color:var(--paper);
  background:transparent;
  border:1px solid var(--line);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(53,242,224,.6);background:rgba(53,242,224,.08)}
.nav-toggle__bars{display:grid;gap:3px;width:18px}
.nav-toggle__bars i{
  display:block;height:2px;width:100%;
  background:var(--cyan);
  transition:transform .25s var(--ease),opacity .2s var(--ease),width .25s var(--ease);
}
.nav-toggle__bars i:nth-child(2){width:70%}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg);width:100%}

/* 抽屉面板（移动端） */
.rail__panel{
  position:fixed;
  top:0;right:0;bottom:0;
  width:min(88vw,340px);
  display:flex;flex-direction:column;gap:20px;
  padding:64px 20px 26px;
  background:linear-gradient(180deg,#0C1B2E 0%,#07111F 100%);
  border-left:1px solid var(--line);
  box-shadow:var(--shadow);
  transform:translateX(103%);
  transition:transform .3s var(--ease);
  overflow-y:auto;
  z-index:90;
}
.rail__panel[data-open]{transform:translateX(0)}
.rail__close{
  align-self:flex-end;
  padding:.5rem .72rem;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.16em;
  color:var(--mute);
  border:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.rail__close:hover{color:var(--cyan);border-color:rgba(53,242,224,.55)}
.rail__scrim{
  position:fixed;inset:0;
  z-index:85;
  background:rgba(4,10,18,.68);
  -webkit-backdrop-filter:blur(2px);
  backdrop-filter:blur(2px);
  opacity:0;visibility:hidden;
  transition:opacity .26s var(--ease),visibility .26s var(--ease);
}
.rail__panel[data-open] ~ .rail__scrim{opacity:1;visibility:visible}

/* 状态行 */
.rail__status{
  display:flex;align-items:center;gap:9px;
  margin:0;
  padding:.55rem .7rem;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.08em;line-height:1.5;
  color:var(--mute);
  background:rgba(28,53,80,.32);
  border-left:2px solid rgba(53,242,224,.5);
}

/* 导航 */
.rail-nav__list{display:flex;flex-direction:column;gap:2px}
.rail-nav__link{
  display:flex;align-items:center;gap:12px;
  padding:.7rem .8rem;
  font-family:var(--font-display);
  font-size:1rem;font-weight:700;letter-spacing:.05em;
  color:var(--paper);
  text-decoration:none;
  border-left:2px solid transparent;
  background:transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.rail-nav__index{
  font-family:var(--font-mono);
  font-size:.66rem;letter-spacing:.12em;
  color:var(--mute);
  transition:color .22s var(--ease);
}
.rail-nav__link:hover{
  background:rgba(53,242,224,.08);
  border-left-color:var(--cyan);
  transform:translateX(3px);
}
.rail-nav__link:hover .rail-nav__index{color:var(--cyan)}
.rail-nav__link[aria-current="page"]{
  color:#FFFFFF;
  border-left-color:var(--cyan);
  background:linear-gradient(90deg,rgba(53,242,224,.18),rgba(53,242,224,0));
}
.rail-nav__link[aria-current="page"] .rail-nav__index{color:var(--cyan)}

/* 常用入口 */
.rail__quick{
  display:flex;flex-direction:column;gap:8px;
  padding-top:16px;
  border-top:1px dashed var(--line);
}
.rail__quick-title{
  margin:0 0 2px;
  font-family:var(--font-mono);
  font-size:.65rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--mute);
}
.rail__quick .btn{width:100%;justify-content:flex-start}
.rail__meta{
  display:flex;align-items:center;gap:8px;
  margin-top:auto;
  padding-top:18px;
  font-family:var(--font-mono);
  font-size:.6rem;letter-spacing:.22em;
  color:rgba(140,163,184,.72);
}
.rail__tick{width:26px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(44px,7vw,80px);
  padding:clamp(32px,5vw,60px) 0 26px;
  background:linear-gradient(180deg,#091625 0%,#050D18 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 42%,var(--orange));
  opacity:.9;
}
.footer-top{
  display:grid;
  gap:32px;
  grid-template-columns:minmax(0,1fr);
}
@media (min-width:720px){
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 26px}
}
@media (min-width:1024px){
  .footer-top{grid-template-columns:1.6fr 1fr 1fr 1fr}
}
.footer-brand__note{
  margin:14px 0 16px;
  max-width:32ch;
  font-size:.9rem;line-height:1.7;
  color:var(--mute);
}
.footer-status{display:grid;gap:8px}
.footer-status li{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.06em;
  color:#A9BFD0;
}
.footer-col__title{
  position:relative;
  margin:0 0 16px;
  padding-bottom:10px;
  font-family:var(--font-serif);
  font-size:.98rem;font-weight:600;letter-spacing:.08em;
  color:var(--paper);
  border-bottom:1px solid var(--line);
}
.footer-col__title::after{
  content:"";
  position:absolute;left:0;bottom:-1px;
  width:30px;height:1px;background:var(--cyan);
}
.footer-col__list{display:grid;gap:10px}
.footer-col__list a{
  display:inline-block;
  font-size:.92rem;
  color:var(--mute);
  text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col__list a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{
  display:grid;
  gap:16px;
  margin-top:36px;
  padding-top:26px;
  border-top:1px dashed var(--line);
}
@media (min-width:720px){
  .footer-contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .footer-contact{grid-template-columns:1fr 1fr 1.6fr}
}
.contact-card .label{margin-bottom:.35rem}
.contact-card__value{
  margin:0;
  font-family:var(--font-mono);
  font-size:.86rem;letter-spacing:.02em;line-height:1.6;
  color:var(--paper);
  word-break:break-word;
}
.footer-note{
  margin:18px 0 0;
  font-size:.8rem;line-height:1.7;
  color:rgba(140,163,184,.9);
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.06em;
  color:var(--mute);
}
.footer-legal__copy,.footer-legal__icp{margin:0}
.to-top{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.45rem .8rem;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.14em;
  color:var(--paper);
  border:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.to-top:hover{color:var(--cyan);border-color:rgba(53,242,224,.6);transform:translateY(-2px)}

/* ---------- 14. 桌面端 · 侧边轨道 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .read-progress{left:var(--rail-w)}

  .site-header{
    position:fixed;
    inset:0 auto 0 0;
    width:var(--rail-w);
    display:flex;
    border-bottom:0;
    border-right:1px solid var(--line);
    background:linear-gradient(180deg,#0C1B2E 0%,#07111F 64%);
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }
  .rail{
    display:flex;flex-direction:column;
    width:100%;height:100%;
  }
  .rail__head{
    flex-direction:column;align-items:flex-start;gap:0;
    padding:28px 22px 22px;
    border-bottom:1px solid var(--line);
  }
  .brand__cn{font-size:1.16rem}
  .brand__en{font-size:.62rem}
  .nav-toggle{display:none}
  .rail__panel{
    position:static;
    inset:auto;
    transform:none;
    width:auto;
    flex:1 1 auto;
    padding:22px 14px 22px;
    background:transparent;
    border-left:0;
    box-shadow:none;
    overflow-y:auto;
  }
  .rail__close{display:none}
  .rail__scrim{display:none}
  .rail-nav__link{font-size:1rem;padding:.72rem .85rem}
  .rail__status{font-size:.66rem}
}

/* ---------- 15. 平板微调 ---------- */
@media (min-width:720px) and (max-width:1023px){
  .rail__head{padding:12px 24px}
  .rail__panel{padding:72px 26px 28px}
  .site-footer{padding-top:44px}
}

/* ---------- 16. 减少动态偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .rail__panel{transition:none}
  .read-progress__bar{transition:none}
}