/* ============================================================
   悦博体育 · 共享样式 /assets/site.css
   深墨蓝战术底板 · 荧光青绿数据高亮 · 琥珀橙状态标记
   ============================================================ */

:root{
  --ink:#0B1B2B;
  --ink-2:#10263D;
  --ink-3:#0D2033;
  --cyan:#29F2C2;
  --cyan-deep:#0F6B5A;
  --amber:#FFA23A;
  --amber-deep:#B65E1A;
  --cold:#F2F7FB;
  --white:#FFFFFF;
  --mist:#9FB6C9;
  --line:#2A4058;
  --line-2:rgba(42,64,88,.55);
  --cyan-a08:rgba(41,242,194,.08);
  --cyan-a16:rgba(41,242,194,.16);
  --amber-a12:rgba(255,162,58,.12);

  --rail-w:76px;
  --rail-open:240px;
  --bar-h:60px;
  --shell:1340px;
  --gutter:clamp(16px,4.2vw,44px);
  --gap:clamp(16px,2vw,26px);

  --r-xs:3px;
  --r-sm:6px;
  --r-md:10px;
  --shadow:0 20px 44px -30px rgba(0,0,0,.95);
  --shadow-soft:0 1px 0 rgba(255,255,255,.04),0 12px 26px -22px rgba(0,0,0,.9);

  --ease:cubic-bezier(.2,.8,.2,1);
  --t-fast:180ms;
  --t:280ms;
  --t-slow:360ms;

  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,sans-serif;
  --font-num:"Oswald","DIN Condensed","Bebas Neue","Inter","Noto Sans SC",sans-serif;
}

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;border-spacing:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:2px}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
html.is-locked{overflow:hidden}

/* ---------- 2. 底板与中文排版 ---------- */
body{
  min-height:100vh;
  padding-top:var(--bar-h);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 84% -14%, rgba(41,242,194,.09), transparent 62%),
    radial-gradient(820px 460px at -8% 22%, rgba(255,162,58,.06), transparent 58%),
    linear-gradient(rgba(42,64,88,.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42,64,88,.2) 1px, transparent 1px);
  background-size:auto,auto,100% 96px,96px 100%;
  color:var(--cold);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.78;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{font-family:var(--font-serif);font-weight:700;line-height:1.22;color:var(--white);letter-spacing:.004em}
p{text-wrap:pretty}
#main-content{display:block;min-height:52vh}
::selection{background:var(--cyan);color:#03231C}

/* ---------- 3. 容器与网格 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.shell--flush{padding-inline:0}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
.stack>*+*{margin-top:var(--stack-gap,16px)}
.rule{height:1px;background:var(--line);border:0;margin-block:clamp(20px,3vw,36px)}
.nowrap{white-space:nowrap}

/* ---------- 4. 区块与标题 ---------- */
.section{padding-block:clamp(48px,7vw,96px);border-top:1px solid var(--line-2)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.section__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:clamp(20px,3vw,34px)}
.section__title{font-size:clamp(1.5rem,3vw,2.3rem)}
.section__lead{max-width:62ch;color:var(--mist);font-size:.95rem}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-num);font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan)}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.75}

.display{font-family:var(--font-serif);color:var(--white);line-height:1.06;letter-spacing:-.012em}
.display--xl{font-size:clamp(2.5rem,7.4vw,5.4rem)}
.display--lg{font-size:clamp(2rem,5vw,3.4rem)}
.lede{font-size:clamp(1rem,1.5vw,1.14rem);color:var(--mist);max-width:64ch}

.num{font-family:var(--font-num);font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.02em;line-height:1}
.num--xl{font-size:clamp(2.6rem,7vw,4.6rem);color:var(--white)}
.num--cyan{color:var(--cyan)}
.num--amber{color:var(--amber)}
.mono-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.05em}
.muted{color:var(--mist)}
.accent{color:var(--cyan)}
.accent--amber{color:var(--amber)}

/* ---------- 5. 按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:.72rem 1.2rem;border:1px solid var(--line);border-radius:var(--r-sm);
  background:rgba(16,38,61,.55);color:var(--cold);
  font-size:.88rem;font-weight:600;letter-spacing:.08em;text-decoration:none;
  transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease),width var(--t) var(--ease);
}
.btn:hover{border-color:var(--cyan);color:var(--white);background:var(--cyan-a08)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:#03231C}
.btn--primary:hover{background:#5CF7D8;border-color:#5CF7D8;color:#03231C}
.btn--amber{border-color:var(--amber-deep);color:var(--amber);background:var(--amber-a12)}
.btn--amber:hover{background:var(--amber);border-color:var(--amber);color:#2B1400}
.btn--sm{padding:.5rem .85rem;font-size:.78rem}
.btn--block{width:100%}

.tag{display:inline-flex;align-items:center;gap:6px;padding:.2rem .58rem;border:1px solid var(--line);border-radius:999px;font-size:.72rem;letter-spacing:.1em;color:var(--mist);background:rgba(11,27,43,.6)}
.tag--cyan{border-color:rgba(41,242,194,.45);color:var(--cyan)}
.tag--amber{border-color:rgba(255,162,58,.45);color:var(--amber)}
.tag--solid{background:var(--cyan);border-color:var(--cyan);color:#03231C;font-weight:700}

/* ---------- 6. 面板 / 摘要板 ---------- */
.panel{
  position:relative;padding:clamp(16px,2.2vw,26px);
  border:1px solid var(--line);border-radius:var(--r-md);
  background:linear-gradient(180deg,rgba(16,38,61,.72),rgba(11,27,43,.72));
  box-shadow:var(--shadow-soft);
  transition:border-color var(--t) var(--ease),transform var(--t) var(--ease);
}
.panel:hover{border-color:rgba(41,242,194,.5)}
.panel--alt{background:linear-gradient(180deg,rgba(13,32,51,.92),rgba(9,22,36,.92))}
.panel--amber{border-color:rgba(255,162,58,.35)}
.panel--amber:hover{border-color:rgba(255,162,58,.7)}
.panel--flush{padding:0;overflow:hidden}
.panel__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:12px;margin-bottom:14px;border-bottom:1px solid var(--line-2)}
.panel__title{font-family:var(--font-sans);font-size:1.02rem;font-weight:700;color:var(--white);letter-spacing:.04em}
.panel__body{color:var(--mist);font-size:.92rem}
.panel__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line-2);font-size:.79rem;color:var(--mist)}

/* ---------- 7. 数据元件 ---------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-num);font-weight:600;font-size:clamp(1.6rem,3.4vw,2.4rem);line-height:1;color:var(--white);font-variant-numeric:tabular-nums}
.stat__label{font-family:var(--font-num);font-size:.74rem;letter-spacing:.2em;color:var(--mist);text-transform:uppercase}
.stat__delta{font-size:.78rem;color:var(--cyan)}
.stat__delta--warn{color:var(--amber)}

.strip{border-block:1px solid var(--line);background:linear-gradient(90deg,rgba(41,242,194,.07),rgba(11,27,43,0) 42%,rgba(255,162,58,.07))}
.strip__track{display:flex;align-items:center;gap:clamp(20px,4vw,56px);overflow-x:auto;padding:16px var(--gutter);scrollbar-width:thin}
.strip__track::-webkit-scrollbar{height:5px}
.strip__track::-webkit-scrollbar-thumb{background:var(--line);border-radius:99px}
.strip__item{flex:0 0 auto;display:flex;align-items:baseline;gap:10px}
.strip__value{font-family:var(--font-num);font-weight:600;font-size:1.5rem;color:var(--cyan);font-variant-numeric:tabular-nums}
.strip__label{font-size:.78rem;letter-spacing:.14em;color:var(--mist)}

.ledger__scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:rgba(13,32,51,.55)}
.ledger{width:100%;min-width:520px;font-size:.9rem}
.ledger caption{text-align:left;padding:14px 14px 0;color:var(--mist);font-size:.78rem;letter-spacing:.12em}
.ledger th{font-family:var(--font-sans);font-size:.74rem;font-weight:600;letter-spacing:.14em;color:var(--mist);text-align:left;white-space:nowrap;padding:13px 14px;border-bottom:1px solid var(--line)}
.ledger td{padding:13px 14px;border-bottom:1px solid var(--line-2);color:var(--cold);vertical-align:middle}
.ledger tbody tr{transition:background var(--t-fast) var(--ease)}
.ledger tbody tr:hover{background:var(--cyan-a08)}
.ledger tbody tr:last-child td{border-bottom:0}
.ledger__num{font-family:var(--font-num);font-weight:600;color:var(--white);font-variant-numeric:tabular-nums}
.ledger__note{display:block;font-size:.73rem;color:var(--mist);letter-spacing:.02em}

/* ---------- 8. 图片容器（页面阶段使用） ---------- */
.media{
  position:relative;display:block;width:100%;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-md);
  background-color:var(--ink-3);
  background-image:
    linear-gradient(135deg,rgba(41,242,194,.06),transparent 46%),
    linear-gradient(315deg,rgba(255,162,58,.06),transparent 46%),
    repeating-linear-gradient(90deg,rgba(42,64,88,.4) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(0deg,rgba(42,64,88,.3) 0 1px,transparent 1px 48px);
}
.media--21x9{aspect-ratio:21/9}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--3x4{aspect-ratio:3/4}
.media--tall{aspect-ratio:2/3}
.media__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media__cap{position:absolute;inset:auto 0 0 0;padding:28px 14px 12px;font-size:.76rem;letter-spacing:.05em;color:var(--cold);background:linear-gradient(180deg,rgba(11,27,43,0),rgba(11,27,43,.92))}
.media__tag{position:absolute;top:12px;left:12px}
.media__ratio-note{position:absolute;right:12px;bottom:12px;font-family:var(--font-num);font-size:.68rem;letter-spacing:.22em;color:rgba(159,182,201,.7)}

/* ---------- 9. 面包屑与工具类 ---------- */
.crumbs{padding-block:14px;border-bottom:1px solid var(--line-2)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:.8rem;color:var(--mist)}
.crumbs__item{display:flex;align-items:center;gap:10px}
.crumbs__item+.crumbs__item::before{content:"/";color:var(--line)}
.crumbs__link{color:var(--mist);text-decoration:none;border-bottom:1px solid transparent;transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease)}
.crumbs__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.crumbs__current{color:var(--cold)}

.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}

/* ---------- 10. 滚动显现 ---------- */
[data-reveal]{opacity:0;transform:translate3d(0,16px,0);transition:opacity var(--t-slow) var(--ease),transform var(--t-slow) var(--ease);transition-delay:var(--reveal-delay,0ms)}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 11. 头部：侧边轨道导航 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:400;
  transform:translateY(-220%);
  padding:.55rem 1rem;border-radius:var(--r-sm);
  background:var(--cyan);color:#03231C;
  font-size:.85rem;font-weight:700;letter-spacing:.08em;text-decoration:none;
  box-shadow:var(--shadow);
  transition:transform var(--t) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.rail{
  position:fixed;top:0;left:0;right:0;height:var(--bar-h);z-index:130;
  display:flex;align-items:center;gap:10px;padding:0 12px;
  background:rgba(9,22,36,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.rail__brand{flex:1 1 auto;min-width:0}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.brand__mark{
  flex:0 0 auto;display:grid;place-items:center;width:38px;height:38px;
  border:1px solid rgba(41,242,194,.5);border-radius:var(--r-sm);
  background:linear-gradient(160deg,rgba(41,242,194,.16),rgba(41,242,194,0));
  font-family:var(--font-serif);font-size:19px;font-weight:700;color:var(--cyan);
}
.brand__text{display:flex;flex-direction:column;min-width:0;line-height:1.18}
.brand__name{font-family:var(--font-serif);font-size:1rem;font-weight:700;color:var(--white);letter-spacing:.06em;white-space:nowrap}
.brand__tagline{font-size:.66rem;letter-spacing:.16em;color:var(--mist);white-space:nowrap}

.rail__toggle{
  flex:0 0 auto;display:grid;place-items:center;width:44px;height:38px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:rgba(16,38,61,.6);
  transition:border-color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
}
.rail__toggle:hover{border-color:var(--cyan);background:var(--cyan-a08)}
.rail__bars{display:grid;gap:4px;width:18px}
.rail__bars span{display:block;height:2px;border-radius:2px;background:var(--cold);transition:transform var(--t) var(--ease),opacity var(--t-fast) var(--ease)}
.rail__toggle[aria-expanded="true"] .rail__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.rail__toggle[aria-expanded="true"] .rail__bars span:nth-child(2){opacity:0}
.rail__toggle[aria-expanded="true"] .rail__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.rail__nav{
  position:fixed;top:var(--bar-h);left:0;bottom:0;z-index:118;
  width:min(86vw,340px);padding:16px 0 128px;overflow-y:auto;
  background:linear-gradient(180deg,var(--ink-2),#0A1926);
  border-right:1px solid var(--line);
  transform:translateX(-102%);visibility:hidden;
  transition:transform var(--t-slow) var(--ease),visibility 0s linear var(--t-slow);
}
.rail__nav[data-open]{transform:translateX(0);visibility:visible;transition:transform var(--t-slow) var(--ease),visibility 0s}
.rail__list{display:flex;flex-direction:column}
.rail__link{
  display:flex;align-items:center;gap:14px;padding:14px 18px;
  color:var(--mist);text-decoration:none;border-left:2px solid transparent;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.rail__link:hover{color:var(--white);background:var(--cyan-a08)}
.rail__link[aria-current="page"]{color:var(--white);border-left-color:var(--cyan);background:var(--cyan-a08)}
.rail__idx{font-family:var(--font-num);font-size:.82rem;font-weight:600;letter-spacing:.08em;color:var(--mist)}
.rail__link[aria-current="page"] .rail__idx{color:var(--cyan)}
.rail__label{font-size:.95rem;letter-spacing:.08em;white-space:nowrap}

.rail__foot{
  position:fixed;left:0;bottom:0;z-index:119;width:min(86vw,340px);
  padding:16px 18px 22px;
  background:linear-gradient(180deg,rgba(16,38,61,0),rgba(16,38,61,.98) 46%);
  transform:translateX(-102%);visibility:hidden;
  transition:transform var(--t-slow) var(--ease),visibility 0s linear var(--t-slow);
}
.rail__nav[data-open] ~ .rail__foot{transform:translateX(0);visibility:visible;transition:transform var(--t-slow) var(--ease),visibility 0s}
.rail__cta{width:100%;justify-content:center}
.rail__cta-icon{font-size:.95rem;line-height:1}
.rail__cta-text{white-space:nowrap;overflow:hidden;max-width:200px;opacity:1;transition:opacity var(--t) var(--ease),max-width var(--t) var(--ease)}

.rail__scrim{
  position:fixed;inset:0;z-index:117;padding:0;border:0;
  background:rgba(4,10,18,.62);
  opacity:0;visibility:hidden;
  transition:opacity var(--t) var(--ease),visibility 0s linear var(--t);
}
.rail__nav[data-open] ~ .rail__scrim{opacity:1;visibility:visible;transition:opacity var(--t) var(--ease),visibility 0s}

.rail__progress{
  position:fixed;left:0;right:0;top:calc(var(--bar-h) - 2px);height:2px;z-index:126;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
  transition:transform 120ms linear;
}

/* ---------- 12. 页脚 ---------- */
.colophon{
  margin-top:clamp(48px,7vw,92px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#0A1926,var(--ink-2) 58%,#0A1926);
}
.colophon__tape{
  display:flex;flex-wrap:wrap;gap:12px clamp(14px,3vw,34px);
  padding:13px var(--gutter);
  border-bottom:1px solid var(--line-2);
  font-family:var(--font-num);font-size:.71rem;letter-spacing:.24em;text-transform:uppercase;
  color:rgba(159,182,201,.8);
}
.colophon__tape-item{display:inline-flex;align-items:center;gap:10px}
.colophon__tape-item::before{content:"";width:5px;height:5px;background:var(--cyan);transform:rotate(45deg)}
.colophon__inner{
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(24px,4vw,58px);
  padding-block:clamp(34px,5vw,68px);
}
.colophon__brand{min-width:0}
.colophon__mark{font-family:var(--font-serif);font-size:clamp(1.6rem,3.6vw,2.4rem);font-weight:700;color:var(--white);letter-spacing:.06em;line-height:1.16}
.colophon__tagline{margin-top:8px;font-family:var(--font-num);font-size:.76rem;letter-spacing:.24em;color:var(--cyan)}
.colophon__note{margin-top:16px;max-width:46ch;font-size:.84rem;color:var(--mist)}
.colophon__col{min-width:0}
.colophon__title{font-family:var(--font-num);font-size:.72rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--mist);margin-bottom:15px}
.colophon__list{display:grid;gap:11px}
.colophon__link{display:inline-flex;align-items:center;gap:10px;color:var(--cold);font-size:.9rem;text-decoration:none;transition:color var(--t-fast) var(--ease)}
.colophon__link::before{content:"";width:14px;height:1px;background:var(--line);transition:background var(--t-fast) var(--ease),width var(--t) var(--ease)}
.colophon__link:hover{color:var(--cyan)}
.colophon__link:hover::before{width:24px;background:var(--cyan)}
.colophon__info{display:grid;gap:12px;font-size:.87rem}
.colophon__row{display:grid;grid-template-columns:46px minmax(0,1fr);gap:12px;align-items:baseline}
.colophon__key{font-family:var(--font-num);font-size:.7rem;letter-spacing:.18em;color:var(--mist)}
.colophon__val{color:var(--cold);word-break:break-word}
.colophon__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 26px;
  padding:16px var(--gutter) 30px;
  border-top:1px solid var(--line-2);
  font-size:.78rem;color:var(--mist);
}
.colophon__legal{display:flex;flex-wrap:wrap;align-items:center;gap:6px 20px}
.colophon__year{font-family:var(--font-num);letter-spacing:.06em;color:var(--cold)}
.colophon__area{color:var(--mist)}
.colophon__meta{color:var(--mist)}

/* ---------- 13. 断点：网格塌陷 ---------- */
@media (max-width:900px){
  .col-3,.col-4{grid-column:span 6}
  .col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .colophon__inner{grid-template-columns:1fr 1fr}
  .colophon__brand{grid-column:1 / -1}
}
@media (max-width:620px){
  .grid--2,.grid--3,.grid--auto{grid-template-columns:1fr}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:span 12}
  .colophon__inner{grid-template-columns:1fr}
  .colophon__row{grid-template-columns:1fr;gap:2px}
  .colophon__legal{flex-direction:column;align-items:flex-start;gap:6px}
}

/* ---------- 14. 断点：桌面端竖直轨道 ---------- */
@media (min-width:960px){
  :root{--bar-h:0px}
  body{padding-top:0;padding-left:var(--rail-w)}

  .rail{
    top:0;bottom:0;left:0;right:auto;
    width:var(--rail-w);height:auto;
    flex-direction:column;align-items:stretch;gap:0;
    padding:14px 0 16px;
    border-bottom:0;border-right:1px solid var(--line);
    background:linear-gradient(180deg,#0C1E30,#0A1725);
    backdrop-filter:none;-webkit-backdrop-filter:none;
    overflow:hidden;
    transition:width var(--t) var(--ease),box-shadow var(--t) var(--ease);
  }
  .rail:hover,.rail:focus-within{width:var(--rail-open);box-shadow:28px 0 60px -44px rgba(0,0,0,1)}

  .rail__brand{flex:0 0 auto;display:flex;align-items:center;height:52px;padding:0 15px}
  .rail__toggle{display:none}

  .rail__nav{
    position:static;transform:none;visibility:visible;
    width:auto;height:auto;flex:1 1 auto;padding:16px 0;
    overflow:visible;background:transparent;border:0;
    transition:none;
  }
  .rail__nav[data-open]{transform:none;visibility:visible}
  .rail__link{padding:11px 16px;gap:12px}
  .rail__idx{font-size:.75rem;min-width:22px}
  .rail__label{opacity:0;max-width:0;overflow:hidden;transition:opacity var(--t) var(--ease),max-width var(--t) var(--ease)}
  .rail:hover .rail__label,.rail:focus-within .rail__label{opacity:1;max-width:180px}

  .rail__foot{
    position:static;transform:none;visibility:visible;
    width:auto;padding:0 12px;background:none;
    transition:none;
  }
  .rail__nav[data-open] ~ .rail__foot{transform:none;visibility:visible}
  .rail__cta{width:52px;padding:.72rem 0;gap:0;justify-content:center;overflow:hidden}
  .rail__cta-text{max-width:0;opacity:0}
  .rail:hover .rail__cta,.rail:focus-within .rail__cta{width:100%;padding:.72rem .9rem;gap:10px;justify-content:flex-start}
  .rail:hover .rail__cta-text,.rail:focus-within .rail__cta-text{max-width:200px;opacity:1}

  .rail__scrim{display:none}

  .rail__progress{
    top:0;bottom:0;left:0;right:auto;width:2px;height:auto;
    transform:scaleY(0);transform-origin:50% 0;
  }
}

/* ---------- 15. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
}