/* ==========================================================================
   永乐高体育 · 共享样式 /assets/site.css
   档案式栅格 + 调度台质感：青灰 / 朱砂红 / 米黄纸 / 深靛蓝
   ========================================================================== */

:root{
  --ink:#12161e;
  --ink-soft:#1b2230;
  --indigo:#22344f;
  --indigo-deep:#16233a;
  --red:#b3251b;
  --red-bright:#c8382a;
  --paper:#f5f0e6;
  --paper-2:#ebe3d3;
  --paper-3:#ddd3bf;
  --stone:#6e7684;
  --stone-2:#9aa1ac;
  --line:rgba(18,22,30,.14);
  --line-2:rgba(18,22,30,.28);
  --line-paper:rgba(245,240,230,.18);
  --shadow-1:0 1px 0 rgba(18,22,30,.04), 0 16px 34px -26px rgba(18,22,30,.5);
  --wrap:1200px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:76px;
  --step:clamp(52px,7.5vw,112px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --font-narrow:"Helvetica Neue Condensed","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:clamp(15px,1.02vw,16.5px);
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body[data-header="solid"]{padding-top:var(--header-h)}
body[data-nav-lock]{overflow:hidden}
h1,h2,h3,h4,h5,h6,p,figure,dl,dd,dt,blockquote{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%;height:auto}
main{display:block}
:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:2px}
::selection{background:var(--red);color:#fff}
#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 20px)}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{font-family:var(--font-narrow);font-weight:800;line-height:1.08;letter-spacing:-.015em}
h1{font-size:clamp(2.1rem,5.2vw,4.2rem);line-height:1.02}
h2{font-size:clamp(1.5rem,3.1vw,2.45rem)}
h3{font-size:clamp(1.1rem,1.7vw,1.4rem);line-height:1.25}
h4{font-size:1.02rem;line-height:1.3}
p{max-width:74ch}
strong{font-weight:700}
.mono{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase}
.mono-label{display:inline-flex;align-items:center;gap:.7em;font-family:var(--font-mono);font-size:.71rem;letter-spacing:.22em;text-transform:uppercase;color:var(--stone)}
.mono-label::before{content:"";width:24px;height:1px;background:var(--red);flex:none}
.lead{font-size:clamp(1rem,1.25vw,1.12rem);color:var(--stone);max-width:60ch}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- 布局 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--narrow{max-width:860px}
.wrap--wide{max-width:1400px}
.section{padding-block:var(--step)}
.section--tight{padding-block:clamp(30px,4.5vw,60px)}
.section--paper{background:var(--paper)}
.section--sand{background:var(--paper-2)}
.section--ink{background:var(--ink);color:var(--paper)}
.section--ink .lead,.section--ink .card__body{color:rgba(245,240,230,.68)}
.section__head{display:grid;gap:.85rem;max-width:72ch;margin-bottom:clamp(24px,3.6vw,46px)}
.section__head--split{grid-template-columns:auto minmax(0,1fr);align-items:end;gap:clamp(14px,2.5vw,32px)}
.grid{display:grid;gap:clamp(16px,2.4vw,30px)}
.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--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}
.rule{height:1px;border:0;background:var(--line);margin:0}
.rule--paper{background:var(--line-paper)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:.82em 1.5em;border:1px solid transparent;border-radius:0;
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.14em;line-height:1;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn--primary{background:var(--red);border-color:var(--red);color:#fff}
.btn--primary:hover{background:var(--red-bright);border-color:var(--red-bright)}
.btn--ghost{border-color:var(--line-2);color:inherit;background:transparent}
.btn--ghost:hover{border-color:var(--red);color:var(--red)}
.btn--paper{border-color:var(--line-paper);color:var(--paper)}
.btn--paper:hover{border-color:var(--paper);color:#fff}
.btn--sm{padding:.62em 1.05em;font-size:.7rem}
.btn--block{width:100%}

/* ---------- 标签 / 印章 / 卡片 ---------- */
.tag{display:inline-flex;align-items:center;gap:.45em;padding:.24em .75em;border:1px solid var(--line-2);background:rgba(255,255,255,.6);font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--stone)}
.tag--red{border-color:var(--red);color:var(--red);background:rgba(179,37,27,.05)}
.tag--indigo{border-color:var(--indigo);color:var(--indigo);background:rgba(34,52,79,.05)}
.stamp{
  display:inline-grid;place-items:center;width:56px;height:56px;
  border:1px solid var(--red);background:rgba(179,37,27,.06);color:var(--red);
  font-family:var(--font-narrow);font-weight:800;font-size:.95rem;line-height:1;letter-spacing:.04em;
  transform:rotate(-3deg);
}
.stamp--lg{width:72px;height:72px;font-size:1.15rem}
.stamp--ink{border-color:var(--indigo);color:var(--indigo);background:rgba(34,52,79,.06)}
.card{
  position:relative;display:grid;gap:.7rem;align-content:start;
  padding:clamp(18px,2.1vw,28px);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:var(--line-2)}
.card--flat{background:transparent;box-shadow:none}
.card--flat:hover{transform:none}
.card--ink{background:var(--ink);border-color:rgba(245,240,230,.14);color:var(--paper)}
.card--ink .card__body{color:rgba(245,240,230,.68)}
.card__index{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;color:var(--red)}
.card__title{font-family:var(--font-narrow);font-weight:700;font-size:1.14rem;line-height:1.28}
.card__body{font-size:.94rem;color:var(--stone)}

/* ---------- 档案表 / 时间线 ---------- */
.ledger{display:grid;border-top:1px solid var(--line);font-size:.92rem}
.ledger__row{display:grid;grid-template-columns:minmax(88px,132px) minmax(0,1fr);gap:1rem;padding:.72rem 0;border-bottom:1px solid var(--line)}
.ledger dt{font-family:var(--font-mono);font-size:.71rem;letter-spacing:.14em;color:var(--stone);padding-top:.28em}
.ledger dd{margin:0}
.ledger--paper{border-color:var(--line-paper)}
.ledger--paper .ledger__row{border-color:var(--line-paper)}
.ledger--paper dt{color:rgba(245,240,230,.52)}
.ledger--paper dd{color:var(--paper)}
.timeline{display:grid;gap:clamp(18px,2.6vw,32px);border-left:1px solid var(--line-2);padding-left:clamp(22px,3vw,38px);margin-left:6px}
.timeline__item{position:relative}
.timeline__item::before{content:"";position:absolute;left:calc(-1 * clamp(22px,3vw,38px) - 5px);top:.6em;width:9px;height:9px;background:var(--paper);border:1px solid var(--red)}
.timeline__meta{display:block;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;color:var(--stone)}

/* ---------- 图片容器 ---------- */
.figure{display:grid;gap:.65rem;margin:0}
.figure__media{position:relative;overflow:hidden;background:var(--paper-3);border:1px solid var(--line);aspect-ratio:4/3}
.figure__media img{width:100%;height:100%;object-fit:cover;filter:saturate(.82) contrast(1.03)}
.figure__ph{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:1rem;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.2em;color:var(--stone);
  background:repeating-linear-gradient(45deg,rgba(18,22,30,.04) 0 8px,transparent 8px 16px);
}
.figure__cap{display:flex;align-items:baseline;gap:.6em;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;color:var(--stone)}
.figure__cap::before{content:"";width:14px;height:1px;background:var(--red);flex:none;transform:translateY(-4px)}
.figure--wide .figure__media{aspect-ratio:16/9}
.figure--tall .figure__media{aspect-ratio:3/4}
.figure--square .figure__media{aspect-ratio:1/1}

/* ---------- 面包屑 / 章节导航 ---------- */
.breadcrumb{padding-block:clamp(14px,2vw,22px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.5em;font-family:var(--font-mono);font-size:.71rem;letter-spacing:.14em;color:var(--stone)}
.breadcrumb__item{display:flex;align-items:center;gap:.5em}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--stone-2)}
.breadcrumb__link{transition:color .2s var(--ease)}
.breadcrumb__link:hover{color:var(--red)}
.breadcrumb__item[aria-current="page"]{color:var(--ink)}
.watch-nav{display:flex;flex-wrap:wrap;gap:.4rem;border-top:1px solid var(--line);padding-top:.9rem}
.watch-nav__link{display:inline-flex;align-items:center;gap:.5em;padding:.34em .7em;border:1px solid transparent;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;color:var(--stone);transition:color .25s var(--ease),border-color .25s var(--ease)}
.watch-nav__link:hover{color:var(--ink);border-color:var(--line-2)}
.watch-nav__link[aria-current="true"],.watch-nav__link.is-active{color:var(--red);border-color:var(--red)}

/* ---------- 显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ==========================================================================
   头部：透明叠加 → 实色阅读态
   ========================================================================== */
.skip-link{
  position:fixed;left:12px;top:-80px;z-index:99;
  padding:.72rem 1.1rem;background:var(--red);color:#fff;
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.14em;
  transition:top .25s var(--ease);
}
.skip-link:focus{top:12px}

.site-header{
  --hdr-fg:var(--paper);
  --hdr-muted:rgba(245,240,230,.66);
  --hdr-hair:rgba(245,240,230,.2);
  position:fixed;top:0;left:0;right:0;z-index:60;
  color:var(--hdr-fg);
  background:linear-gradient(180deg,rgba(11,14,20,.9) 0%,rgba(11,14,20,.56) 58%,rgba(11,14,20,0) 100%);
  transition:background .35s var(--ease),color .35s var(--ease),box-shadow .35s var(--ease);
}
.site-header[data-scrolled],
body[data-header="solid"] .site-header{
  --hdr-fg:var(--ink);
  --hdr-muted:var(--stone);
  --hdr-hair:var(--line);
  background:rgba(245,240,230,.94);
  -webkit-backdrop-filter:blur(10px) saturate(1.1);
  backdrop-filter:blur(10px) saturate(1.1);
  box-shadow:0 1px 0 var(--line),0 18px 44px -36px rgba(18,22,30,.75);
}
.site-header[data-open],
body[data-header="solid"] .site-header[data-open]{
  --hdr-fg:var(--paper);
  --hdr-muted:rgba(245,240,230,.6);
  --hdr-hair:rgba(245,240,230,.2);
  background:linear-gradient(180deg,rgba(11,14,20,.9) 0%,rgba(11,14,20,.5) 60%,rgba(11,14,20,0) 100%);
  box-shadow:none;
  -webkit-backdrop-filter:none;
  backdrop-filter:none;
}
.site-header__inner{
  position:relative;z-index:80;
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  height:var(--header-h);max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gutter);
}
.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden;pointer-events:none}
.progress__bar{display:block;width:0;height:100%;background:var(--red)}

.brand{display:flex;align-items:center;gap:.7rem;flex:none}
.brand__seal{
  display:grid;place-items:center;width:38px;height:38px;flex:none;
  background:var(--red);border:1px solid var(--red);color:#fff;
  font-family:var(--font-narrow);font-weight:800;font-size:.92rem;line-height:1;letter-spacing:.02em;
  transform:rotate(-2deg);
}
.brand__text{display:grid;line-height:1.2}
.brand__name{font-family:var(--font-narrow);font-weight:800;font-size:1.06rem;letter-spacing:.05em}
.brand__code{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;color:var(--hdr-muted);transition:color .35s var(--ease)}

.nav{display:flex;align-items:center;gap:clamp(8px,1.5vw,20px);margin-left:auto}
.nav__list{display:flex;align-items:center;gap:clamp(2px,.5vw,8px)}
.nav__item{display:block}
.nav__link{position:relative;display:inline-flex;align-items:baseline;gap:.5em;padding:.55em .7em;font-size:.94rem;letter-spacing:.03em;color:var(--hdr-fg);transition:color .25s var(--ease)}
.nav__label{display:inline}
.nav__index{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;color:var(--hdr-muted);transition:color .25s var(--ease)}
.nav__link::after{content:"";position:absolute;left:.7em;right:.7em;bottom:.28em;height:1px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav__link:hover .nav__index{color:var(--red)}
.nav__link:hover::after,
.nav__link[aria-current="page"]::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{font-weight:600}
.nav__foot{display:none}
.nav__note{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;line-height:1.7;color:rgba(245,240,230,.55)}
.header-cta{display:flex;align-items:center;margin-left:clamp(6px,1.2vw,16px)}

.nav-toggle{display:none;align-items:center;gap:.6rem;margin-left:auto;padding:.6rem .2rem .6rem .6rem;color:var(--hdr-fg);font-family:var(--font-mono);font-size:.68rem;letter-spacing:.2em;transition:color .35s var(--ease)}
.nav-toggle__bars{display:grid;gap:5px;width:22px}
.nav-toggle__bar{display:block;height:1px;background:currentColor;transition:transform .3s var(--ease),opacity .25s var(--ease)}

@media (max-width:960px){
  .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .nav{
    position:fixed;top:0;right:0;bottom:0;left:auto;z-index:70;
    display:flex;flex-direction:column;align-items:stretch;gap:0;margin:0;
    width:min(88vw,380px);
    padding:calc(var(--header-h) + 20px) clamp(20px,5vw,32px) 36px;
    background:var(--ink);color:var(--paper);
    border-left:1px solid rgba(245,240,230,.14);
    transform:translateX(102%);transition:transform .4s var(--ease);
    overflow-y:auto;overscroll-behavior:contain;
  }
  .site-header[data-open] .nav{transform:translateX(0);box-shadow:-40px 0 70px -40px rgba(0,0,0,.7)}
  .site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0}
  .site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .nav__list{flex-direction:column;align-items:stretch;gap:0;border-top:1px solid rgba(245,240,230,.14)}
  .nav__item{border-bottom:1px solid rgba(245,240,230,.14)}
  .nav__link{width:100%;justify-content:space-between;padding:1.05rem .15rem;font-size:1.04rem;color:var(--paper)}
  .nav__index{color:rgba(245,240,230,.5);font-size:.66rem}
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--red-bright)}
  .nav__foot{display:grid;gap:1rem;margin-top:auto;padding-top:28px}
}
@media (max-width:560px){
  :root{--header-h:62px}
  .brand__seal{width:32px;height:32px;font-size:.8rem}
  .brand__name{font-size:.98rem}
  .brand__code{display:none}
  .nav-toggle__label{display:none}
}

/* ==========================================================================
   页脚：档案柜层次
   ========================================================================== */
.site-footer{position:relative;overflow:hidden;background:var(--ink);color:var(--paper);padding-block:clamp(46px,6.5vw,92px) 0}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:repeating-linear-gradient(0deg,rgba(245,240,230,.05) 0 1px,transparent 1px 48px);
}
.site-footer > .wrap{position:relative}
.footer__top{
  display:grid;grid-template-columns:minmax(220px,1.15fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3.6vw,54px);
  padding-bottom:clamp(30px,4.5vw,62px);
  border-bottom:1px solid var(--line-paper);
}
.footer__brand{display:grid;gap:.75rem;align-content:start}
.footer__name{font-family:var(--font-narrow);font-weight:800;font-size:1.35rem;letter-spacing:.05em}
.footer__code{font-family:var(--font-mono);font-size:.67rem;letter-spacing:.18em;color:rgba(245,240,230,.5)}
.footer__desc{font-size:.87rem;color:rgba(245,240,230,.66);max-width:34ch}
.footer__col{display:grid;gap:.4rem;align-content:start;min-width:0}
.footer__col--contact{max-width:420px}
.footer__title{margin-bottom:.85rem;font-family:var(--font-mono);font-weight:400;font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--red-bright)}
.footer__list{display:grid;gap:.5rem}
.footer__list a{display:inline-block;font-size:.94rem;color:rgba(245,240,230,.78);transition:color .2s var(--ease),transform .2s var(--ease)}
.footer__list a:hover{color:#fff;transform:translateX(3px)}
.footer__note{margin-top:1rem;font-size:.78rem;line-height:1.72;color:rgba(245,240,230,.5);max-width:42ch}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.8rem 1.6rem;
  padding-block:22px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;color:rgba(245,240,230,.5);
}
.footer__legal{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em}
.footer__links{display:flex;flex-wrap:wrap;gap:1.3em}
.footer__links a{transition:color .2s var(--ease)}
.footer__links a:hover{color:var(--paper)}

.to-top{
  position:fixed;right:clamp(14px,2.5vw,28px);bottom:clamp(14px,2.5vw,28px);z-index:65;
  display:inline-flex;align-items:center;gap:.5em;padding:.7rem 1rem;
  background:var(--ink);color:var(--paper);border:1px solid rgba(245,240,230,.22);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background .25s var(--ease),border-color .25s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--red);border-color:var(--red)}

@media (max-width:1000px){
  .footer__top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:1 / -1}
}
@media (max-width:640px){
  .footer__top{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}

/* ---------- 响应式网格收敛 ---------- */
@media (max-width:900px){
  .grid--2,.grid--3,.grid--4,.grid--split{grid-template-columns:1fr}
  .section__head--split{grid-template-columns:1fr;align-items:start}
}
@media (max-width:560px){
  .ledger__row{grid-template-columns:1fr;gap:.15rem}
  .ledger dt{padding-top:0}
}

/* ---------- 动效克制 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .card:hover{transform:none}
}