/* 猫头鹰体育 · 共享样式 /assets/site.css
   夜蓝底 / 深墨绿面板 / 三色数据高亮：荧光青柠、琥珀金、冰蓝
   印刷边框、纸张叠层、边缘刻度 —— 不使用圆角卡片式默认企业骨架 */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:var(--ice);text-decoration:underline;text-underline-offset:.24em;text-decoration-thickness:1px}
a:hover{color:var(--lime)}
:focus{outline:none}
:focus-visible{outline:2px solid var(--ice);outline-offset:3px}
::selection{background:var(--lime);color:var(--night)}

:root{
  --night:#0A1A22;
  --deep:#102B27;
  --rock:#2B3438;
  --moss:#4F6B4B;
  --clay:#B5643C;
  --paper:#F1EBE0;
  --lime:#C8F24E;
  --amber:#E9A93C;
  --ice:#7ED4E9;
  --paper-72:rgba(241,235,224,.72);
  --paper-56:rgba(241,235,224,.56);
  --paper-38:rgba(241,235,224,.38);
  --rule:rgba(241,235,224,.14);
  --rule-strong:rgba(241,235,224,.3);
  --deep-veil:rgba(16,43,39,.72);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --shell:1320px;
  --shell-wide:1440px;
  --shell-narrow:820px;
  --gutter:clamp(18px,4vw,56px);
  --header-upper-h:38px;
  --header-lower-h:76px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  background-color:var(--night);
  background-image:
    radial-gradient(120% 55% at 86% -12%,rgba(16,43,39,.95),rgba(10,26,34,0) 62%),
    radial-gradient(80% 40% at 4% 4%,rgba(181,100,60,.09),rgba(10,26,34,0) 60%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
#main-content{display:block;flex:1 1 auto}
body.nav-open{overflow:hidden}

/* ---------- 版心 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.shell--wide{max-width:var(--shell-wide)}
.shell--narrow{max-width:var(--shell-narrow)}

/* ---------- 跳转链接 ---------- */
.skip-link{position:fixed;left:var(--gutter);top:0;z-index:200;transform:translateY(-160%);
  background:var(--lime);color:var(--night);font-size:13px;font-weight:800;letter-spacing:.1em;
  padding:10px 16px;text-decoration:none;transition:transform .2s var(--ease)}
.skip-link:focus{transform:translateY(0);color:var(--night)}

/* ---------- 头部：双层信息导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:var(--night);border-bottom:1px solid var(--rule-strong)}
.site-header__tier{position:relative}
.site-header__tier--upper{background:var(--deep);border-bottom:1px solid var(--rule);
  height:var(--header-upper-h);overflow:hidden;opacity:1;
  transition:height .32s var(--ease),opacity .24s linear,border-color .24s linear}
.site-header[data-condensed="true"] .site-header__tier--upper{height:0;opacity:0;border-bottom-color:transparent}

.header-upper{display:flex;align-items:center;gap:clamp(12px,2vw,24px);height:var(--header-upper-h)}
.header-upper__label{flex:0 0 auto;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.26em;
  color:var(--lime);text-transform:uppercase}
.header-upper__track{display:flex;align-items:center;gap:clamp(18px,3vw,34px);flex:1 1 auto;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.header-upper__track::-webkit-scrollbar{display:none}
.header-upper__item{display:flex;align-items:center;gap:8px;white-space:nowrap;
  font-size:12.5px;letter-spacing:.02em;color:var(--paper-72)}
.header-upper__note{flex:0 0 auto;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  color:var(--paper-38);white-space:nowrap}

.header-lower{display:flex;align-items:center;gap:clamp(14px,3vw,40px);
  min-height:var(--header-lower-h);padding-block:12px;transition:padding .28s var(--ease),min-height .28s var(--ease)}
.site-header[data-condensed="true"] .header-lower{min-height:60px;padding-block:8px}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--paper);text-decoration:none}
.brand:hover{color:var(--paper)}
.brand__mark{position:relative;flex:0 0 auto;width:28px;height:28px;border:1.5px solid var(--moss);border-radius:50%;
  background:radial-gradient(70% 70% at 50% 40%,rgba(200,242,78,.14),rgba(10,26,34,0))}
.brand__mark::before{content:"";position:absolute;left:7px;top:9px;width:4px;height:4px;border-radius:50%;
  background:var(--lime);box-shadow:10px 0 0 var(--lime)}
.brand__mark::after{content:"";position:absolute;left:50%;top:13px;transform:translateX(-50%);
  width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid var(--clay)}
.brand__text{display:grid;gap:2px}
.brand__name{font-size:17px;font-weight:800;letter-spacing:-.01em;line-height:1.1}
.brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--paper-56);line-height:1.2}

.nav{display:flex;align-items:center;gap:clamp(14px,2.6vw,34px);margin-left:auto}
.nav__list{display:flex;align-items:center;gap:clamp(12px,2vw,26px);flex-wrap:wrap}
.nav__link{position:relative;display:inline-block;padding:8px 2px;font-size:14.5px;font-weight:600;
  letter-spacing:.06em;color:var(--paper-72);text-decoration:none;transition:color .2s var(--ease)}
.nav__link:hover{color:var(--paper);text-decoration:none}
.nav__link[aria-current="page"]{color:var(--lime)}
.nav__link[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime)}

.cta-link{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid var(--rule-strong);
  border-radius:var(--radius);background:rgba(233,169,60,.07);color:var(--amber);
  font-size:13.5px;font-weight:800;letter-spacing:.09em;text-decoration:none;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
.cta-link:hover,.cta-link:focus-visible{background:var(--lime);border-color:var(--lime);color:var(--night);text-decoration:none}

.nav-toggle{display:none;align-items:center;gap:8px;margin-left:auto;padding:10px 12px;
  border:1px solid var(--rule-strong);border-radius:var(--radius);color:var(--paper)}
.nav-toggle__bar{display:block;width:16px;height:1.5px;background:var(--paper);
  transition:transform .24s var(--ease)}
.nav-toggle__bar+.nav-toggle__bar{margin-top:4px}
.nav-toggle__text{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  writing-mode:horizontal-tb;margin-left:2px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-of-type{transform:translateY(2.75px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(2){transform:translateY(-2.75px) rotate(-45deg)}

/* 边缘刻度：随滚动进度点亮，与章节编号一致 */
.edge-ticks{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:60;
  display:grid;gap:5px;justify-items:end;pointer-events:none}
.edge-ticks__tick{width:11px;height:1px;background:var(--rock);
  transition:width .24s var(--ease),background-color .24s var(--ease)}
.edge-ticks__tick.is-lit{width:22px;background:var(--lime)}

/* 实时呼吸点 */
.ticker-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);flex:0 0 auto;
  animation:breathe 2.8s linear infinite}
@keyframes breathe{
  0%{box-shadow:0 0 0 0 rgba(200,242,78,.45)}
  60%{box-shadow:0 0 0 6px rgba(200,242,78,0)}
  100%{box-shadow:0 0 0 0 rgba(200,242,78,0)}
}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:clamp(56px,9vw,132px);background:var(--deep);
  border-top:1px solid var(--rule-strong);position:relative}
.site-footer::before{content:"";position:absolute;inset:0 0 auto 0;height:6px;opacity:.6;
  background-image:repeating-linear-gradient(90deg,var(--moss) 0 1px,transparent 1px 14px)}
.footer-inner{padding-block:clamp(36px,6vw,72px) 26px}

.footer-top{display:grid;grid-template-columns:minmax(220px,.85fr) minmax(0,1.15fr);
  gap:clamp(20px,4vw,48px);align-items:end;padding-bottom:clamp(20px,3vw,32px);border-bottom:1px solid var(--rule)}
.footer-brand{display:grid;gap:6px;justify-items:start}
.footer-brand .brand__mark{width:34px;height:34px}
.footer-brand .brand__mark::before{left:9px;top:11px;box-shadow:11px 0 0 var(--lime)}
.footer-brand .brand__mark::after{top:16px}
.footer-brand__name{font-size:21px;font-weight:900;letter-spacing:-.01em;line-height:1.1}
.footer-brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--paper-56)}
.footer-statement{font-size:15px;line-height:1.8;color:var(--paper-72);max-width:42ch;
  border-left:2px solid var(--clay);padding-left:16px}

.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(24px,4vw,56px);padding-block:clamp(24px,4vw,40px)}
.footer-col__title{font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.28em;
  color:var(--lime);text-transform:uppercase;margin-bottom:14px}
.footer-list{display:grid;gap:10px}
.footer-list__link{display:inline-block;width:fit-content;font-size:14.5px;color:var(--paper-72);
  text-decoration:none;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-list__link:hover{color:var(--paper);border-bottom-color:var(--ice)}
.footer-contact{display:grid;gap:12px}
.footer-contact__row{display:grid;gap:3px}
.footer-contact__label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;color:var(--paper-38)}
.footer-contact__value{font-family:var(--font-mono);font-size:13.5px;line-height:1.5;
  letter-spacing:.02em;color:var(--paper);word-break:break-word}
.footer-contact__value--text{font-family:var(--font-sans);font-size:13.5px;line-height:1.7;color:var(--paper-72)}
.footer-note{margin-top:16px;font-size:12.5px;line-height:1.7;color:var(--paper-56);
  border-left:2px solid var(--moss);padding-left:12px}

.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;
  padding-top:20px;border-top:1px solid var(--rule);font-size:12.5px;color:var(--paper-56)}
.footer-copy{letter-spacing:.06em}
.footer-icp{font-family:var(--font-mono);letter-spacing:.06em}

/* ---------- 章节与编号体系 ---------- */
.section{padding-block:clamp(48px,8vw,110px);position:relative}
.section__head{display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:clamp(16px,3vw,40px);align-items:start}
.section__rail{display:grid;gap:14px;justify-items:start;min-width:0}
.section__num{font-family:var(--font-mono);font-weight:700;font-size:clamp(48px,7vw,96px);
  line-height:.85;letter-spacing:-.04em;color:var(--amber);font-variant-numeric:tabular-nums}
.section__title{font-size:clamp(22px,3.2vw,34px);font-weight:900;letter-spacing:-.02em;line-height:1.22}
.section__lead{margin-top:14px;color:var(--paper-72);max-width:34em}

.annotation{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--paper-38)}
.annotation--vertical{writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.34em}

.prose{max-width:33em;line-height:1.75;color:var(--paper-72)}
.prose p+p{margin-top:1em}
.prose h3{margin:1.6em 0 .6em;font-size:clamp(18px,2.2vw,22px);font-weight:800;
  letter-spacing:-.01em;color:var(--paper);line-height:1.35}
.prose strong{color:var(--paper);font-weight:800}
.prose ul{display:grid;gap:.5em;margin-top:.8em}
.prose ul li{padding-left:1.4em;position:relative}
.prose ul li::before{content:"";position:absolute;left:0;top:.78em;width:8px;height:1px;background:var(--lime)}

.divider{height:1px;background:var(--rule);border:0;margin:0}

/* ---------- 栅格 ---------- */
.grid{display:grid;gap:clamp(18px,3vw,32px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}
.col-main,.col-aside{min-width:0}
.col-aside{align-self:start}

/* ---------- 面板 / 纸张叠层 ---------- */
.panel{position:relative;background:var(--deep);border:1px solid var(--rule);
  border-radius:var(--radius);padding:clamp(20px,3vw,32px)}
.panel--stack{box-shadow:6px 6px 0 -1px rgba(79,107,75,.6),12px 12px 0 -2px rgba(43,52,56,.85)}
.panel--paper{background:var(--paper);border-color:var(--paper);color:var(--night)}
.panel--paper a{color:#8C4A28}
.panel--paper a:hover{color:#5B2E14}
.panel__label{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  color:var(--lime);margin-bottom:14px}
.panel--paper .panel__label{color:#7A5A3A}

/* ---------- 数字与统计 ---------- */
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.stat{display:grid;gap:8px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;
  font-size:clamp(40px,7vw,96px);line-height:.9;letter-spacing:-.03em;color:var(--amber)}
.stat__label{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;color:var(--paper-56)}
.stat--lime .stat__value{color:var(--lime)}
.stat--ice .stat__value{color:var(--ice)}

/* ---------- 标签 ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;padding:3px 9px;border:1px solid var(--rule-strong);
  border-radius:var(--radius);background:rgba(241,235,224,.05);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--paper-72)}
.tag--lime{background:var(--lime);border-color:var(--lime);color:var(--night)}
.tag--clay{background:rgba(181,100,60,.24);border-color:var(--clay);color:var(--paper)}
.tag--moss{background:var(--moss);border-color:var(--moss);color:var(--paper)}
.tag--amber{background:var(--amber);border-color:var(--amber);color:var(--night)}
.tag--rotate{transform:rotate(-2deg)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border:1px solid var(--rule-strong);
  border-radius:var(--radius);font-size:14px;font-weight:800;letter-spacing:.07em;text-decoration:none;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
.btn--primary{background:var(--lime);border-color:var(--lime);color:var(--night)}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--paper);border-color:var(--paper);color:var(--night);text-decoration:none}
.btn--ghost{background:transparent;color:var(--paper)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--ice);color:var(--ice);text-decoration:none}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:16px;border-bottom:1px solid var(--rule)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.06em}
.breadcrumb__item{display:flex;align-items:center;gap:8px;color:var(--paper-56)}
.breadcrumb__link{color:var(--paper-72);text-decoration:none}
.breadcrumb__link:hover{color:var(--ice);text-decoration:underline}
.breadcrumb__sep{color:var(--paper-38);font-family:var(--font-mono)}

/* ---------- 注释展开（点击式字段说明） ---------- */
.note{display:grid}
.note-toggle{display:inline-flex;align-items:center;gap:6px;width:fit-content;text-align:left;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--ice);
  border-bottom:1px dashed rgba(126,212,233,.5);padding:2px 0;
  transition:color .2s var(--ease),border-color .2s var(--ease)}
.note-toggle::after{content:"+";font-size:13px;color:var(--lime);line-height:1}
.note-toggle:hover{color:var(--lime);border-bottom-color:var(--lime)}
.note[data-open="true"] .note-toggle::after{content:"−"}
.note-body{overflow:hidden;max-height:0;transition:max-height .3s var(--ease)}
.note[data-open="true"] .note-body{max-height:24em}
.note-body__inner{margin-top:10px;padding:12px 14px;background:var(--deep-veil);
  border-left:2px solid var(--moss);font-size:13px;line-height:1.7;color:var(--paper-72)}

/* ---------- 图片容器（页面阶段放置素材） ---------- */
.media-frame{position:relative;border:1px solid var(--rule-strong);border-radius:var(--radius);
  overflow:hidden;background:linear-gradient(150deg,#0C1F28,var(--deep))}
.media-frame__inner{position:relative;aspect-ratio:16/9;
  background-image:
    radial-gradient(120% 90% at 72% 8%,rgba(126,212,233,.16),rgba(10,26,34,0) 62%),
    repeating-linear-gradient(115deg,rgba(200,242,78,.05) 0 2px,rgba(10,26,34,0) 2px 14px)}
.media-frame__inner img,.media-frame__inner picture{width:100%;height:100%;object-fit:cover}
.media-frame__caption{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--paper-72);
  background:linear-gradient(to top,rgba(10,26,34,.94),rgba(10,26,34,0))}
.media-frame--wide .media-frame__inner{aspect-ratio:21/9}
.media-frame--tall .media-frame__inner{aspect-ratio:4/5}
.media-frame--square .media-frame__inner{aspect-ratio:1/1}

/* ---------- 滚动显现（仅在 JS 启用动效时隐藏初始状态） ---------- */
html[data-motion="on"] [data-reveal]{opacity:0;transform:translateY(16px);
  transition:opacity .32s var(--ease),transform .32s var(--ease)}
html[data-motion="on"] [data-reveal].is-visible{opacity:1;transform:none}
html[data-motion="on"] [data-reveal-stagger]>*{opacity:0;transform:translateY(14px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);transition-delay:var(--reveal-delay,0ms)}
html[data-motion="on"] [data-reveal-stagger].is-visible>*{opacity:1;transform:none}

/* ---------- 平板 ---------- */
@media (max-width:1080px){
  .header-upper__note{display:none}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--thirds{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .nav-toggle{display:inline-flex;flex-direction:row;align-items:center}
  .nav{position:fixed;top:0;right:0;bottom:0;z-index:70;width:min(90vw,360px);
    display:block;margin-left:0;padding:calc(var(--header-lower-h) + 34px) 24px 32px;
    background:var(--deep);border-left:1px solid var(--rule);overflow-y:auto;
    transform:translateX(101%);visibility:hidden;
    transition:transform .32s var(--ease),visibility .32s linear}
  .nav[data-open="true"]{transform:none;visibility:visible}
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__item{border-bottom:1px solid var(--rule)}
  .nav__link{display:block;padding:16px 4px;font-size:16px}
  .nav__link[aria-current="page"]::after{left:4px;right:auto;width:22px;bottom:10px}
  .cta-link{margin-top:26px;width:100%;justify-content:center}
  .grid--split,.grid--halves,.grid--thirds{grid-template-columns:minmax(0,1fr)}
  .section__head{grid-template-columns:minmax(0,1fr);gap:14px}
  .section__rail{display:flex;align-items:baseline;gap:14px}
  .annotation--vertical{writing-mode:horizontal-tb;letter-spacing:.2em}
}

@media (max-width:600px){
  .brand__line{display:none}
  .header-upper__label{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{justify-content:flex-start}
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important}
  html[data-motion="on"] [data-reveal],
  html[data-motion="on"] [data-reveal-stagger]>*{opacity:1;transform:none}
  .ticker-dot{animation:none;box-shadow:0 0 0 3px rgba(200,242,78,.18)}
}