/* =========================================================
   云体育赛事 · 共享样式 /assets/site.css
   深空蓝基底 · 荧光青时间轴 · 信号橙状态
   ========================================================= */

/* ---------- 1. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol,pre{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video,canvas{display:block;max-width:100%;}
button{border:0;background:none;font:inherit;color:inherit;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
fieldset{border:0;padding:0;margin:0;}

/* ---------- 2. 变量 ---------- */
:root{
  --bg-0:#0A1730;
  --bg-1:#11294B;
  --bg-2:#0C1D3A;
  --bg-deep:#071224;
  --bg-read:#142F52;

  --line:#1F3A63;
  --line-soft:rgba(31,58,99,.62);

  --cyan:#2BE8D0;
  --cyan-deep:#16A79A;
  --orange:#FF7A2F;
  --orange-soft:#FFB37A;
  --purple:#7A5CFF;
  --red:#FF5470;

  --ink:#E9F1FF;
  --ink-dim:#93A7C4;

  --cyan-a08:rgba(43,232,208,.08);
  --cyan-a16:rgba(43,232,208,.16);
  --orange-a14:rgba(255,122,47,.14);
  --purple-a14:rgba(122,92,255,.14);
  --red-a14:rgba(255,84,112,.14);

  --shell:1240px;
  --r-lg:22px;
  --r-md:14px;
  --r-sm:10px;
  --r-pill:999px;

  --ticker-h:38px;
  --bar-h:66px;
  --offset-top:calc(var(--ticker-h) + var(--bar-h));

  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --font-display:"Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"DejaVu Sans Mono",monospace;

  --ease:cubic-bezier(.22,.68,.32,1);
}
@media (max-width:1024px){:root{--bar-h:62px;}}
@media (max-width:640px){:root{--ticker-h:34px;--bar-h:58px;--r-lg:18px;--r-md:12px;}}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  padding-top:var(--offset-top);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(920px 540px at 82% -6%, rgba(43,232,208,.10), transparent 68%),
    radial-gradient(760px 500px at -8% 8%, rgba(122,92,255,.13), transparent 70%),
    linear-gradient(rgba(31,58,99,.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31,58,99,.28) 1px, transparent 1px);
  background-size:auto,auto,72px 72px,72px 72px;
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  overflow-x:hidden;
}
@media (max-width:900px){body{background-attachment:scroll;}}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.16;letter-spacing:-.01em;color:var(--ink);}
h1{font-size:clamp(34px,5.2vw,60px);}
h2{font-size:clamp(24px,3vw,34px);}
h3{font-size:clamp(18px,2vw,22px);font-weight:700;letter-spacing:0;}
h4{font-size:16.5px;font-weight:700;letter-spacing:0;}
strong,b{font-weight:700;color:#fff;}
b{font-family:var(--font-mono);font-weight:700;}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.muted{color:var(--ink-dim);}
.lede{max-width:42em;color:var(--ink-dim);font-size:17px;}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

/* ---------- 4. 布局骨架 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 clamp(16px,4vw,40px);}
.section{padding:clamp(36px,5.5vw,80px) 0;}
.section--tight{padding:clamp(22px,3.5vw,48px) 0;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:clamp(20px,3vw,34px);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.2em;color:var(--cyan);text-transform:uppercase;}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);}
.divider{height:1px;border:0;background:var(--line-soft);margin:clamp(22px,3vw,40px) 0;}

.stack{display:flex;flex-direction:column;gap:clamp(14px,2vw,22px);}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.grid{display:grid;gap:clamp(14px,2vw,20px);}
.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));}
.grid--main{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);}
.grid--wide{grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--4,.grid--main,.grid--wide{grid-template-columns:minmax(0,1fr);}
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 18px;border-radius:var(--r-pill);
  border:1px solid transparent;font-size:14.5px;font-weight:700;letter-spacing:.01em;
  background:var(--bg-1);color:var(--ink);white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn--signal{background:var(--orange);color:#0A1730;box-shadow:0 12px 28px -16px rgba(255,122,47,.95);}
.btn--signal:hover{background:var(--orange-soft);}
.btn--cyan{background:var(--cyan);color:#06182B;}
.btn--cyan:hover{background:#5BF2DE;}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--quiet{background:rgba(17,41,75,.7);color:var(--ink);border-color:var(--line);}
.btn--quiet:hover{border-color:var(--cyan-deep);color:var(--cyan);}
.btn--block{width:100%;}

/* ---------- 6. 头部：追踪条 + 导航 ---------- */
.skip-link{
  position:fixed;top:10px;left:14px;z-index:140;
  padding:10px 18px;border-radius:var(--r-pill);
  background:var(--cyan);color:#06182B;font-size:14px;font-weight:700;
  transform:translateY(-200%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);}

.site-header{position:fixed;top:0;left:0;right:0;z-index:100;}

.ticker{background:var(--bg-deep);border-bottom:1px solid var(--line);}
.ticker__inner{
  display:flex;align-items:center;gap:20px;
  height:var(--ticker-h);overflow:hidden;white-space:nowrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--ink-dim);
}
.ticker__live{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-weight:700;}
.dot{
  width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 4px rgba(43,232,208,.16);
  animation:pulse 2s var(--ease) infinite;
}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(43,232,208,.14);}50%{box-shadow:0 0 0 7px rgba(43,232,208,.04);}}
.ticker__item{display:inline-flex;align-items:center;gap:6px;}
.ticker__item + .ticker__item::before{content:"";width:1px;height:12px;background:var(--line);margin-right:14px;}
.ticker__item b{color:var(--cyan);font-family:var(--font-mono);}

.header__bar{
  position:relative;background:transparent;
  transition:background .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header[data-scrolled] .header__bar{
  background:rgba(10,23,48,.93);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 24px 48px -34px rgba(0,0,0,.95);
}
.header__inner{display:flex;align-items:center;gap:20px;height:var(--bar-h);}

.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand__mark{
  width:36px;height:36px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--cyan) 0%,var(--cyan-deep) 52%,var(--purple) 130%);
  color:#06182B;font-family:var(--font-display);font-weight:800;font-size:17px;
  box-shadow:0 10px 24px -14px rgba(43,232,208,.9);
}
.brand__text{display:flex;flex-direction:column;line-height:1.3;}
.brand__name{font-family:var(--font-display);font-size:17px;font-weight:800;letter-spacing:.01em;color:var(--ink);}
.brand__tag{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--ink-dim);}

.nav{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav__list{display:flex;align-items:center;gap:2px;}
.nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 12px;border-radius:var(--r-pill);
  font-size:14.5px;color:var(--ink-dim);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav__idx{font-family:var(--font-mono);font-size:10px;color:var(--cyan-deep);letter-spacing:.06em;}
.nav__link:hover{color:var(--ink);background:var(--cyan-a08);}
.nav__link:hover .nav__idx{color:var(--cyan);}
.nav__link[aria-current="page"]{
  color:var(--cyan);background:var(--cyan-a08);
  box-shadow:inset 0 0 0 1px rgba(43,232,208,.34);
}
.nav__link[aria-current="page"] .nav__idx{color:var(--cyan);}
.nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  border-radius:2px;background:var(--cyan);
}
.nav__cta{margin-left:6px;}

.nav-toggle{
  display:none;align-items:center;gap:9px;height:40px;padding:0 15px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  background:rgba(17,41,75,.7);color:var(--ink);font-size:13px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px;height:14px;}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:var(--cyan);transition:transform .22s var(--ease),width .22s var(--ease);}
.nav-toggle__bars span:nth-child(2){width:70%;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){width:100%;transform:translateY(-3px) rotate(-45deg);}
.nav-toggle__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;}

.header__progress{height:2px;background:transparent;overflow:hidden;}
.site-header[data-scrolled] .header__progress{background:rgba(31,58,99,.5);}
.header__progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--orange));transition:width .12s linear;}

@media (max-width:1024px){
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav{
    position:fixed;top:var(--offset-top);left:0;right:0;margin:0;
    flex-direction:column;align-items:stretch;gap:14px;
    padding:18px clamp(16px,4vw,40px) 26px;
    background:rgba(9,20,41,.98);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    box-shadow:0 40px 70px -40px #000;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .nav[data-open]{opacity:1;visibility:visible;transform:translateY(0);}
  .nav__list{flex-direction:column;align-items:stretch;gap:4px;}
  .nav__link{
    justify-content:flex-start;gap:12px;padding:13px 14px;
    border:1px solid transparent;border-radius:var(--r-md);
    font-size:16px;color:var(--ink);
  }
  .nav__link::after{display:none;}
  .nav__link[aria-current="page"]{border-color:rgba(43,232,208,.34);}
  .nav__cta{width:100%;height:46px;font-size:15px;}
}
@media (max-width:480px){
  .brand__tag{display:none;}
  .brand__mark{width:32px;height:32px;font-size:15px;}
}
@media (max-width:760px){
  .ticker__item--sm-hide{display:none;}
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(52px,8vw,110px);
  background:var(--bg-deep);border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);opacity:.65;
}
.footer__main{
  display:grid;grid-template-columns:minmax(240px,.9fr) minmax(0,2fr);
  gap:clamp(28px,4vw,64px);padding:clamp(38px,5.5vw,72px) 0 30px;
}
.footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px;}
.footer__logo{font-family:var(--font-display);font-size:24px;font-weight:800;letter-spacing:-.01em;}
.footer__tagline{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--cyan);}
.footer__lede{font-size:14px;color:var(--ink-dim);max-width:24em;}
.footer__cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.footer__group-title{
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;
  letter-spacing:.16em;color:var(--cyan);margin-bottom:14px;
}
.footer__list{display:flex;flex-direction:column;gap:2px;}
.footer__link{
  display:inline-flex;align-items:center;gap:8px;padding:5px 0;
  font-size:15px;color:var(--ink-dim);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer__link::before{content:"";width:6px;height:1px;background:var(--line);transition:width .2s var(--ease),background .2s var(--ease);}
.footer__link:hover{color:var(--cyan);transform:translateX(2px);}
.footer__link:hover::before{width:14px;background:var(--cyan);}

.footer__contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:16px 24px;padding:clamp(18px,2.4vw,24px);
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(17,41,75,.75),rgba(10,23,48,.25));
}
.footer__field{display:flex;flex-direction:column;gap:5px;min-width:0;}
.footer__field--wide{grid-column:span 2;}
.footer__field-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--cyan-deep);}
.footer__field-value{font-size:14.5px;color:var(--ink);word-break:break-word;}
.footer__hint{
  grid-column:1 / -1;padding-top:14px;margin-top:2px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;color:var(--ink-dim);
}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 24px;margin-top:26px;padding:20px 0 40px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;color:var(--ink-dim);
}
.footer__meta{font-family:var(--font-mono);letter-spacing:.04em;}
.footer__note{flex:1 1 220px;}
@media (max-width:1024px){
  .footer__main{grid-template-columns:minmax(0,1fr);gap:32px;}
  .footer__cols{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));}
}
@media (max-width:560px){
  .footer__field--wide{grid-column:1 / -1;}
}

/* ---------- 8. 状态与小元件 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  border-radius:var(--r-pill);border:1px solid transparent;
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;letter-spacing:.08em;
  white-space:nowrap;
}
.badge--update{background:var(--orange-a14);color:var(--orange-soft);border-color:rgba(255,122,47,.4);animation:breathe 2s var(--ease) infinite;}
.badge--live{background:var(--cyan-a16);color:var(--cyan);border-color:rgba(43,232,208,.38);}
.badge--version{background:var(--purple-a14);color:#B7A6FF;border-color:rgba(122,92,255,.42);}
.badge--alert{background:var(--red-a14);color:#FF8EA1;border-color:rgba(255,84,112,.42);}
.badge--quiet{background:rgba(147,167,196,.1);color:var(--ink-dim);border-color:var(--line);}
@keyframes breathe{0%,100%{box-shadow:0 0 0 0 rgba(255,122,47,0);}50%{box-shadow:0 0 0 5px rgba(255,122,47,.12);}}

.timestamp{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;color:var(--ink-dim);}
.timestamp::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan-deep);flex:0 0 auto;}

.chip{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  background:rgba(17,41,75,.6);font-size:13px;color:var(--ink-dim);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.chip:hover,.chip.is-active,.chip[aria-pressed="true"]{color:var(--cyan);border-color:rgba(43,232,208,.5);background:var(--cyan-a08);}

.copy-chip{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:var(--r-pill);border:1px dashed var(--line);
  background:transparent;color:var(--ink-dim);
  font-family:var(--font-mono);font-size:12px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.copy-chip:hover{color:var(--cyan);border-color:var(--cyan-deep);}
.copy-chip[data-copied="ok"]{color:var(--cyan);border-style:solid;border-color:var(--cyan);}
.copy-chip[data-copied="fail"]{color:#FF8EA1;border-style:solid;border-color:var(--red);}

.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:14.5px;font-weight:600;}
.link-arrow::after{content:"→";transition:transform .22s var(--ease);}
.link-arrow:hover::after{transform:translateX(5px);}

/* ---------- 9. 面板 / 数据 / 长文 ---------- */
.panel{
  position:relative;
  background:linear-gradient(180deg,rgba(17,41,75,.92),rgba(10,23,48,.72));
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(16px,2.2vw,24px);
}
.panel--flush{padding:0;overflow:hidden;}
.panel--quiet{background:rgba(12,29,58,.62);}
.panel--read{background:var(--bg-read);border-color:#26456F;}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:15px clamp(16px,2.2vw,24px);border-bottom:1px solid var(--line);
}
.panel__title{font-size:15.5px;font-weight:700;letter-spacing:.01em;}
.panel__body{padding:clamp(16px,2.2vw,24px);}
.panel__foot{
  padding:14px clamp(16px,2.2vw,24px);
  border-top:1px solid var(--line);background:rgba(7,18,36,.5);
  border-radius:0 0 var(--r-lg) var(--r-lg);
}

.kpi{display:flex;flex-direction:column;gap:6px;}
.kpi__num{font-family:var(--font-mono);font-size:clamp(28px,4.4vw,44px);font-weight:700;line-height:1;color:var(--cyan);letter-spacing:-.02em;}
.kpi__unit{font-family:var(--font-mono);font-size:13px;color:var(--ink-dim);}
.kpi__label{font-size:13px;color:var(--ink-dim);letter-spacing:.04em;}
.kpi--signal .kpi__num{color:var(--orange);}
.kpi--plain .kpi__num{color:var(--ink);}

.data-table{width:100%;font-size:14px;}
.data-table caption{text-align:left;font-family:var(--font-mono);font-size:12.5px;color:var(--ink-dim);padding-bottom:10px;}
.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--line-soft);text-align:left;vertical-align:top;}
.data-table thead th{
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.12em;
  color:var(--cyan);background:rgba(17,41,75,.78);
}
.data-table tbody tr:hover{background:rgba(43,232,208,.05);}
.data-table .num{font-family:var(--font-mono);}

.timeline{position:relative;padding-left:22px;}
.timeline::before{
  content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--cyan),rgba(43,232,208,.08));
}
.timeline__item{position:relative;padding:0 0 20px;}
.timeline__item::before{
  content:"";position:absolute;left:-21px;top:8px;width:9px;height:9px;border-radius:50%;
  background:var(--bg-0);border:1px solid var(--cyan-deep);
}
.timeline__item--now::before{background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 0 4px rgba(43,232,208,.16);}

.breadcrumbs{padding-top:16px;}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;color:var(--ink-dim);}
.breadcrumbs li{display:flex;align-items:center;gap:8px;}
.breadcrumbs li + li::before{content:"/";color:var(--line);}
.breadcrumbs a:hover{color:var(--cyan);}
.breadcrumbs [aria-current="page"]{color:var(--ink);}

.prose{max-width:34em;font-size:16.5px;line-height:1.85;color:var(--ink);}
.prose h2{margin:1.6em 0 .6em;}
.prose h3{margin:1.4em 0 .5em;}
.prose p{margin:0 0 1.1em;}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.25em;list-style:disc;}
.prose ol{list-style:decimal;}
.prose li{margin:.35em 0;}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;}
.prose blockquote{border-left:2px solid var(--cyan);padding-left:16px;color:var(--ink-dim);}

/* ---------- 10. 章节时间轴侧栏 ---------- */
.page-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:clamp(22px,3vw,48px);align-items:start;}
.rail{position:sticky;top:calc(var(--offset-top) + 22px);align-self:start;}
.rail__title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  color:var(--cyan-deep);margin-bottom:14px;
}
.rail__list{position:relative;border-left:1px solid var(--line);}
.rail__link{
  position:relative;display:block;padding:9px 12px 9px 18px;
  font-size:13.5px;color:var(--ink-dim);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.rail__link::before{
  content:"";position:absolute;left:-4.5px;top:50%;margin-top:-3.5px;
  width:8px;height:8px;border-radius:50%;
  background:var(--bg-0);border:1px solid var(--line);
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.rail__link:hover{color:var(--ink);background:rgba(31,58,99,.32);}
.rail__link.is-active{color:var(--cyan);background:var(--cyan-a08);}
.rail__link.is-active::before{background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 0 4px rgba(43,232,208,.16);}
.rail__link.is-active::after{content:"";position:absolute;left:-1px;top:6px;bottom:6px;width:2px;border-radius:2px;background:var(--cyan);}
@media (max-width:1024px){
  .page-layout{grid-template-columns:minmax(0,1fr);gap:20px;}
  .rail{
    position:sticky;top:var(--offset-top);z-index:20;
    padding:10px 12px;margin-bottom:6px;
    background:rgba(10,23,48,.94);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    border:1px solid var(--line);border-radius:var(--r-md);
  }
  .rail__title{display:none;}
  .rail__list{display:flex;gap:8px;overflow-x:auto;border-left:0;scrollbar-width:none;}
  .rail__list::-webkit-scrollbar{display:none;}
  .rail__link{white-space:nowrap;padding:7px 13px;border:1px solid var(--line);border-radius:var(--r-pill);font-size:13px;}
  .rail__link::before,.rail__link.is-active::after{display:none;}
  .rail__link.is-active{border-color:rgba(43,232,208,.5);}
}

/* ---------- 11. 图片容器 ---------- */
.media{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(160deg,#16345C,#0A1730 72%);
}
.media__frame{position:relative;aspect-ratio:16 / 9;display:grid;place-items:center;}
.media__frame img,.media__frame svg,.media__frame picture{grid-area:1 / 1;width:100%;height:100%;object-fit:cover;}
.media__ph{
  grid-area:1 / 1;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.18em;color:rgba(147,167,196,.72);text-transform:uppercase;
}
.media__scan{
  position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(43,232,208,.07) 0 1px,transparent 1px 5px);
}
.media__caption{
  padding:12px 16px;border-top:1px solid var(--line);
  background:rgba(7,18,36,.72);
  font-family:var(--font-mono);font-size:12px;color:var(--ink-dim);
}
.media--wide .media__frame{aspect-ratio:21 / 9;}
.media--tall .media__frame{aspect-ratio:4 / 5;}
.media--square .media__frame{aspect-ratio:1 / 1;}

/* ---------- 12. 显现与返回顶部 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
html.js [data-reveal][data-shown]{opacity:1;transform:none;}

.to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:90;
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:rgba(17,41,75,.93);color:var(--ink);
  font-size:13px;font-family:var(--font-mono);letter-spacing:.06em;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.to-top::before{content:"↑";color:var(--cyan);}
.to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:var(--cyan);color:var(--cyan);}

/* ---------- 13. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.js [data-reveal]{opacity:1;transform:none;}
}