/* ============================================================
   /assets/site.css — 米乐体育 · 赛季内容档案馆 共享样式
   外壳：侧边轨道导航 + 框景内容区 + 刻度页脚
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --night-ink:#081713;
  --moss-panel:#0E2A22;
  --pitch-deep:#164036;
  --bone-white:#EDEAE1;
  --stone-grey:#8A948C;
  --lime-signal:#C6F24E;
  --gold-record:#E0A63C;
  --plum-verdict:#7A3E63;
  --plum-text:#C58AB4;
  --clay-accent:#B4694A;
  --hairline:#2C4A40;
  --focus-ring:#EAF7B8;

  --rail-w:84px;
  --bar-h:60px;
  --maxw:1400px;
  --gutter:clamp(18px,4vw,56px);

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","Noto Sans Mono CJK SC",ui-monospace,SFMono-Regular,Menlo,"Courier New",monospace;
  --font-body:"Inter","Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

/* ---------- 2. Reset 与基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html.is-nav-locked{overflow:hidden}
body{
  margin:0;
  background:var(--night-ink);
  color:var(--bone-white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;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}
:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}
::selection{background:var(--lime-signal);color:var(--night-ink)}

/* ---------- 3. 工具类 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.rule{height:1px;background:var(--hairline);border:0;margin:0}
.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}

.display{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(32px,5.2vw,64px);
  line-height:1.02;
  letter-spacing:-.02em;
}
.h2{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(20px,2.4vw,26px);
  line-height:1.2;
  letter-spacing:-.01em;
}
.kicker{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--stone-grey);
  text-transform:uppercase;
}
.lead{font-size:clamp(17px,1.35vw,20px);line-height:1.75;max-width:62ch}
.note{font-size:13px;line-height:1.7;color:var(--stone-grey)}
.quote{
  border-left:2px solid var(--gold-record);
  padding-left:18px;
  font-weight:500;
  max-width:60ch;
}

/* ---------- 4. 侧边轨道导航 ---------- */
.site-header{position:relative;z-index:60}

.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  background:var(--lime-signal);color:var(--night-ink);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  padding:10px 16px;transition:transform .16s ease-out;
}
.skip-link:focus{transform:none}

.rail-scrim{
  display:none;
  position:fixed;inset:0;z-index:65;
  background:rgba(4,12,10,.68);
  opacity:0;pointer-events:none;
  transition:opacity .18s ease-out;
}

.rail{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--rail-w);
  display:flex;flex-direction:column;align-items:center;
  padding:16px 0 18px;
  background:linear-gradient(180deg,var(--moss-panel) 0%,var(--night-ink) 70%);
  border-right:1px solid var(--hairline);
  overflow-y:auto;overflow-x:hidden;
  overscroll-behavior:contain;
  scrollbar-width:none;
  z-index:70;
}
.rail::-webkit-scrollbar{display:none}

.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding-top:2px;color:var(--bone-white);
}
.rail__mark{
  width:38px;height:38px;display:grid;place-items:center;
  background:var(--night-ink);
  border:1px solid var(--pitch-deep);
  color:var(--lime-signal);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.02em;
}
.rail__word{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-display);font-weight:700;
  font-size:15px;line-height:1;letter-spacing:.22em;
}

.rail__nav{margin:auto 0;padding:22px 0}
.rail__list{display:flex;flex-direction:column;align-items:center;gap:2px}
.rail__item{display:block}

.rail__link{
  display:flex;flex-direction:row;align-items:center;gap:7px;
  writing-mode:vertical-rl;text-orientation:upright;
  padding:9px 7px;
  color:var(--stone-grey);
  font-size:12px;line-height:1;letter-spacing:.16em;
  border-right:2px solid transparent;
  transition:color .16s ease-out,background-color .16s ease-out,border-color .16s ease-out;
}
.rail__link::before{
  content:"";flex:none;
  width:5px;height:5px;
  background:currentColor;opacity:.55;
  transition:opacity .16s ease-out;
}
.rail__link:hover{color:var(--bone-white);background:rgba(198,242,78,.06)}
.rail__link[aria-current="page"]{
  color:var(--lime-signal);
  border-right-color:var(--lime-signal);
  background:rgba(198,242,78,.08);
}
.rail__link[aria-current="page"]::before{opacity:1}
.rail__label{display:block}

.rail__meta{
  writing-mode:vertical-rl;text-orientation:upright;
  border-top:1px solid var(--hairline);
  padding-top:12px;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:10px;line-height:1;letter-spacing:.24em;
  color:var(--stone-grey);opacity:.85;
}

.mobile-bar{display:none}

.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:9px 12px;
  border:1px solid var(--hairline);
  color:var(--bone-white);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .16s ease-out,color .16s ease-out;
}
.nav-toggle:hover{border-color:var(--lime-signal);color:var(--lime-signal)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:14px}
.nav-toggle__bars span{
  display:block;width:100%;height:1px;background:currentColor;
  transition:transform .16s ease-out,opacity .16s ease-out;
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{display:inline-block}

/* ---------- 5. 主内容区偏移 ---------- */
#main-content{
  display:block;
  margin-left:var(--rail-w);
  min-height:60vh;
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-left:var(--rail-w);
  background:var(--moss-panel);
  border-top:1px solid var(--hairline);
  color:var(--bone-white);
}
.footer__ruler{
  height:10px;
  background-image:repeating-linear-gradient(90deg,var(--hairline) 0 1px,transparent 1px 18px);
  opacity:.85;
}
.footer__inner{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,2.4fr) minmax(0,1.3fr);
  gap:clamp(30px,4vw,64px);
  max-width:var(--maxw);margin-inline:auto;
  padding:clamp(38px,5vw,72px) var(--gutter) clamp(26px,3vw,44px);
}
.footer__brand{max-width:42ch}
.footer__mark{
  font-family:var(--font-display);font-weight:700;
  font-size:26px;line-height:1.1;letter-spacing:.04em;
}
.footer__sub{
  margin-top:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--lime-signal);
}
.footer__text{margin-top:16px;font-size:14px;line-height:1.75;color:var(--stone-grey)}
.footer__stamp{
  margin-top:18px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  color:var(--stone-grey);opacity:.8;
}
.footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
}
.footer__col{min-width:0}
.footer__title{
  font-family:var(--font-mono);font-weight:500;
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--stone-grey);
  padding-bottom:12px;margin-bottom:14px;
  border-bottom:1px solid var(--hairline);
}
.footer__list{display:flex;flex-direction:column;gap:10px;font-size:14px;line-height:1.6}
.footer__list a{
  color:var(--bone-white);opacity:.85;
  transition:color .16s ease-out,opacity .16s ease-out;
}
.footer__list a:hover{color:var(--lime-signal);opacity:1}
.footer__list--meta{gap:12px;font-family:var(--font-mono);font-size:12px}
.footer__label{
  display:block;
  font-size:10px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--stone-grey);
}
.footer__value{display:block;color:var(--bone-white);word-break:break-word}
.footer__contact{min-width:0}

.footer__base{
  display:flex;flex-wrap:wrap;gap:10px 30px;justify-content:space-between;
  max-width:var(--maxw);margin-inline:auto;
  padding:20px var(--gutter) 44px;
  border-top:1px solid var(--hairline);
  font-family:var(--font-mono);font-size:12px;line-height:1.6;
  color:var(--stone-grey);
}
.footer__legal{max-width:56ch}
.footer__editor{max-width:56ch}
.footer__copy{color:var(--stone-grey)}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;
  border:1px solid var(--lime-signal);
  color:var(--lime-signal);
  background:transparent;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;line-height:1;
  cursor:pointer;
  transition:background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out;
}
.btn:hover{background:var(--lime-signal);color:var(--night-ink)}
.btn--solid{background:var(--lime-signal);color:var(--night-ink)}
.btn--solid:hover{background:transparent;color:var(--lime-signal)}
.btn--ghost{border-color:var(--hairline);color:var(--bone-white)}
.btn--ghost:hover{background:var(--pitch-deep);border-color:var(--pitch-deep);color:var(--bone-white)}
.btn--gold{border-color:var(--gold-record);color:var(--gold-record)}
.btn--gold:hover{background:var(--gold-record);color:var(--night-ink)}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--stone-grey);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li+li::before{content:"/";color:var(--hairline)}
.breadcrumbs a{color:var(--stone-grey)}
.breadcrumbs a:hover{color:var(--lime-signal)}
.breadcrumbs [aria-current="page"]{color:var(--bone-white)}

/* ---------- 9. 版式节奏与网格 ---------- */
.section{padding-block:clamp(72px,9vw,132px)}
.section--tight{padding-block:clamp(40px,5vw,72px)}
.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

/* ---------- 10. 框景与索引行 ---------- */
.frame{
  position:relative;
  border:1px solid var(--hairline);
  padding:clamp(26px,4vw,56px);
  background:linear-gradient(180deg,rgba(14,42,34,.55),rgba(8,23,19,0) 65%);
}
.frame::before,
.frame::after{
  content:"";position:absolute;left:0;right:0;height:9px;
  background-image:repeating-linear-gradient(90deg,var(--hairline) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.frame::before{top:0}
.frame::after{bottom:0}
.frame__tag{
  position:absolute;top:0;left:clamp(16px,3vw,40px);
  transform:translateY(-50%);
  background:var(--night-ink);padding:0 10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  color:var(--lime-signal);
}

.index-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  padding-bottom:14px;border-bottom:1px solid var(--hairline);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--stone-grey);text-transform:uppercase;
}
.index-row__mark{width:6px;height:6px;background:var(--lime-signal);transform:rotate(45deg);flex:none}
.index-row__sep{color:var(--hairline)}

/* ---------- 11. 面板 / 卡片 / 统计 ---------- */
.panel{
  background:var(--moss-panel);
  border:1px solid var(--hairline);
  padding:clamp(20px,3vw,34px);
}
.panel--plum{background:var(--plum-verdict);border-color:#5C2E4A;color:var(--plum-text)}
.panel--plum .kicker,
.panel--plum .note{color:var(--plum-text);opacity:.85}
.panel--plum .stat__value,
.panel--plum .stat__label{color:var(--plum-text)}

.card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--moss-panel);
  border:1px solid var(--hairline);
  padding:22px;
  transition:border-color .16s ease-out,background-color .16s ease-out,outline-color .16s ease-out;
}
.card:hover{border-color:var(--pitch-deep)}
.card--plum{background:var(--plum-verdict);border-color:#5C2E4A;color:var(--plum-text)}
.card--plum .stat__value,
.card--plum .stat__label{color:var(--plum-text)}
.card[data-selected]{border-color:var(--lime-signal);outline:1px solid var(--lime-signal);outline-offset:-1px}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3vw,40px);line-height:1;letter-spacing:-.01em;
  color:var(--lime-signal);
}
.stat__label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--stone-grey);
}

/* ---------- 12. 筛选器 ---------- */
.filters{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:22px 40px;
  padding:18px 0;
  border-top:1px solid var(--hairline);
  border-bottom:1px solid var(--hairline);
}
.filter-group{display:flex;flex-direction:column;gap:10px}
.filter-group__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--stone-grey);text-transform:uppercase;
}
.filter-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;
  padding:6px 12px;
  border:1px solid var(--hairline);
  color:var(--stone-grey);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;line-height:1.2;
  cursor:pointer;
  transition:color .16s ease-out,border-color .16s ease-out,background-color .16s ease-out;
}
.chip:hover{color:var(--bone-white);border-color:var(--pitch-deep)}
.chip[aria-pressed="true"],
.chip[aria-current="page"]{background:var(--lime-signal);border-color:var(--lime-signal);color:var(--night-ink)}

/* ---------- 13. 时间轴 ---------- */
.timeline{
  position:relative;
  display:flex;flex-direction:column;gap:28px;
  padding-left:26px;
  border-left:1px solid var(--hairline);
}
.timeline__item{position:relative}
.timeline__item::before{
  content:"";position:absolute;left:-32px;top:8px;
  width:11px;height:11px;
  background:var(--night-ink);
  border:1px solid var(--stone-grey);
  transform:rotate(45deg);
  transition:background-color .16s ease-out,border-color .16s ease-out;
}
.timeline__item[data-active]::before{background:var(--lime-signal);border-color:var(--lime-signal)}
.timeline__round{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--stone-grey);
}

/* ---------- 14. 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 10px;
  border:1px solid var(--gold-record);
  color:var(--gold-record);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;line-height:1.4;
}
.badge::before{
  content:"";flex:none;
  width:6px;height:6px;
  background:currentColor;
  transform:rotate(45deg);
}
.badge--lime{border-color:var(--lime-signal);color:var(--lime-signal)}
.badge--plum{border-color:var(--plum-text);color:var(--plum-text)}
.badge--muted{border-color:var(--hairline);color:var(--stone-grey)}

/* ---------- 15. 图片容器 ---------- */
.figure{display:block;margin:0}
.img-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--hairline);
  background:
    repeating-linear-gradient(135deg,var(--pitch-deep) 0 6px,var(--moss-panel) 6px 12px);
}
.img-frame img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.06) brightness(.94);
}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(8,23,19,.10),rgba(8,23,19,.52));
}
.img-frame--wide{aspect-ratio:16/9}
.img-frame--tall{aspect-ratio:3/4}
.img-frame--square{aspect-ratio:1/1}
.figure__caption{
  margin-top:10px;padding-top:8px;
  border-top:1px solid var(--hairline);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--stone-grey);
}

/* ---------- 16. 长阅读容器 ---------- */
.prose{max-width:70ch}
.prose p+p{margin-top:1.1em}
.prose h2{margin-top:2.2em;margin-bottom:.6em}
.prose ul{margin-top:1em;display:flex;flex-direction:column;gap:.5em}
.prose ul li{padding-left:18px;position:relative}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.85em;
  width:6px;height:1px;background:var(--lime-signal);
}
.prose--light{
  background:var(--bone-white);color:var(--night-ink);
  padding:clamp(26px,4vw,56px);
  max-width:none;
}
.prose--light a{color:var(--clay-accent);text-decoration:underline}
.prose--light .note{color:#5C6660}

/* ---------- 17. 动效：显现 / 进度 / 返回顶部 ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(6px);
  transition:opacity .22s ease-out,transform .22s ease-out;
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

.read-progress{
  position:fixed;top:0;left:var(--rail-w);right:0;
  height:2px;background:var(--lime-signal);
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;z-index:90;
}
.to-top{
  position:fixed;right:clamp(16px,3vw,36px);bottom:clamp(16px,3vw,36px);
  z-index:85;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;
  border:1px solid var(--hairline);
  background:rgba(8,23,19,.92);
  color:var(--bone-white);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  cursor:pointer;
  opacity:0;pointer-events:none;
  transition:opacity .18s ease-out,color .16s ease-out,border-color .16s ease-out;
}
.to-top.is-visible{opacity:1;pointer-events:auto}
.to-top:hover{color:var(--lime-signal);border-color:var(--lime-signal)}

/* ---------- 18. 响应式 ---------- */
@media (max-width:1080px){
  .footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr)}
  .footer__contact{grid-column:1 / -1}
  .footer__list--meta{flex-direction:row;flex-wrap:wrap;gap:24px}
}
@media (max-width:980px){
  .grid--7-5,
  .grid--8-4{grid-template-columns:minmax(0,1fr)}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:900px){
  html.is-nav-locked{overflow:hidden}

  .rail{
    width:min(82vw,320px);
    align-items:stretch;
    padding:22px 0 26px;
    background:var(--moss-panel);
    border-right:1px solid var(--hairline);
    transform:translateX(-102%);
    transition:transform .18s ease-out;
  }
  .site-header[data-open] .rail{transform:none}

  .rail-scrim{display:block}
  .site-header[data-open] .rail-scrim{opacity:1;pointer-events:auto}

  .rail__brand{
    flex-direction:row;align-items:center;gap:12px;
    padding:0 22px 20px;
  }
  .rail__word{
    writing-mode:horizontal-tb;text-orientation:initial;
    font-size:17px;letter-spacing:.16em;
  }
  .rail__nav{margin:0;padding:8px 0 0;border-top:1px solid var(--hairline)}
  .rail__list{align-items:stretch;gap:0}
  .rail__link{
    writing-mode:horizontal-tb;text-orientation:initial;
    flex-direction:row;justify-content:flex-start;gap:12px;
    padding:15px 22px;
    font-size:15px;letter-spacing:.06em;
    border-right:0;border-left:2px solid transparent;
  }
  .rail__link::before{width:6px;height:6px}
  .rail__link[aria-current="page"]{border-left-color:var(--lime-signal);border-right-color:transparent}
  .rail__meta{
    writing-mode:horizontal-tb;text-orientation:initial;
    margin-top:18px;
    padding:18px 22px 0;
    border-top:1px solid var(--hairline);
    letter-spacing:.2em;
  }

  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:fixed;top:0;left:0;right:0;height:var(--bar-h);
    padding:0 14px 0 18px;
    background:rgba(8,23,19,.94);
    border-bottom:1px solid var(--hairline);
    z-index:80;
  }
  .mobile-bar__brand{display:flex;align-items:center;gap:10px;color:var(--bone-white)}
  .mobile-bar__mark{
    width:28px;height:28px;display:grid;place-items:center;
    border:1px solid var(--pitch-deep);
    color:var(--lime-signal);
    font-family:var(--font-mono);font-size:11px;font-weight:700;
  }
  .mobile-bar__name{
    font-family:var(--font-display);font-weight:700;
    font-size:16px;letter-spacing:.08em;
  }

  #main-content{margin-left:0;padding-top:var(--bar-h)}
  .site-footer{margin-left:0}

  .read-progress{left:0;top:var(--bar-h)}

  .footer__inner{grid-template-columns:minmax(0,1fr);gap:34px}
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 24px}
  .footer__base{flex-direction:column;gap:12px}
}
@media (max-width:560px){
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__nav{grid-template-columns:minmax(0,1fr)}
  .frame{padding:24px 20px}
  .to-top{right:14px;bottom:14px;padding:9px 12px}
}

/* ---------- 19. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .rail{transition:none}
}