/* ==========================================================================
   完美体育主站 — 共享样式 /assets/site.css
   设计语言：夜场竞技 × 档案库｜深墨绿 · 场地线白 · 荧光青 · 琥珀橙
   ========================================================================== */

/* 1. 令牌与重置 ---------------------------------------------------------- */
:root{
  --ink-900:#0A1F1A;
  --ink-800:#123A2E;
  --line-white:#F7F9F4;
  --paper:#F4EFE3;
  --paper-dim:#E6DFCE;
  --cyan:#2FE3C6;
  --amber:#F2A03C;
  --muted:#5E7269;
  --alert:#C8503C;

  --rule:rgba(10,31,26,.14);
  --rule-strong:rgba(10,31,26,.3);
  --rule-dark:rgba(247,249,244,.16);
  --rule-dark-strong:rgba(247,249,244,.34);

  --maxw:1240px;
  --gutter:clamp(1.1rem,4vw,3rem);
  --nav-h:64px;
  --t:160ms cubic-bezier(.2,.7,.3,1);

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-num:"SFMono-Regular",ui-monospace,Menlo,Consolas,"Roboto Mono","Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

img,svg,video{display:block;max-width:100%;height:auto}

a{color:inherit}

button,input,select,textarea{font:inherit;color:inherit}

ul,ol{margin:0;padding:0;list-style:none}

h1,h2,h3,h4,h5{
  margin:0 0 .6em;
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.022em;
}

h1{font-size:clamp(2.1rem,5.4vw,3.5rem)}
h2{font-size:clamp(1.65rem,3.6vw,2.5rem)}
h3{font-size:clamp(1.25rem,2.4vw,1.75rem)}
h4{font-size:1.375rem}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

:focus-visible{outline:2px solid var(--amber);outline-offset:3px}

/* 2. 工具与容器 ---------------------------------------------------------- */
.wrap{
  width:min(calc(100% - 2 * var(--gutter)),var(--maxw));
  margin-inline:auto;
}

.prose{max-width:34em}
.prose p{margin-bottom:1.1em}

.lead{font-size:1.12rem;line-height:1.8;max-width:36em}

.muted{color:var(--muted)}

.eyebrow{
  margin:0 0 .6rem;
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--amber);
}

.rule{
  border:0;
  border-top:1px solid var(--rule);
  margin:2rem 0;
}

hr{border:0;border-top:1px solid var(--rule);margin:2rem 0}

.grid{
  display:grid;
  gap:clamp(1rem,2.2vw,1.75rem);
  grid-template-columns:repeat(12,minmax(0,1fr));
}

.u-span-3,.u-span-4,.u-span-5,.u-span-6,.u-span-7,.u-span-8,.u-span-9,.u-span-12{grid-column:span 12}
.u-span-3{grid-column:span 3}
.u-span-4{grid-column:span 4}
.u-span-5{grid-column:span 5}
.u-span-6{grid-column:span 6}
.u-span-7{grid-column:span 7}
.u-span-8{grid-column:span 8}
.u-span-9{grid-column:span 9}

/* 3. 区块与标题组 -------------------------------------------------------- */
.section{
  position:relative;
  padding-block:clamp(3rem,7vw,6rem);
}

.section--dark,
.panel--dark,
.site-footer{
  --rule:var(--rule-dark);
  --rule-strong:var(--rule-dark-strong);
}

.section--dark{
  background:var(--ink-900);
  color:var(--line-white);
  line-height:1.85;
}

.section--dark .muted{color:rgba(247,249,244,.66)}

.sec-head{
  border-top:1px solid var(--rule-strong);
  padding-top:1.1rem;
  margin-bottom:clamp(1.6rem,3vw,2.6rem);
}

.sec-head__idx{
  display:block;
  margin:0 0 .5rem;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:.8rem;
  letter-spacing:.2em;
  color:var(--amber);
}

.sec-head__title{margin:0}

.sec-head__note{
  margin:.6rem 0 0;
  max-width:46ch;
  font-size:.95rem;
  color:var(--muted);
}

.section--dark .sec-head__note{color:rgba(247,249,244,.66)}

/* 4. 按钮 ---------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:.68rem 1.1rem;
  border:1px solid var(--rule-strong);
  border-radius:0;
  background:transparent;
  color:var(--ink-900);
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.04em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t);
}

.btn:hover{background:var(--ink-900);border-color:var(--ink-900);color:var(--line-white)}

.btn--cta{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink-900);
}

.btn--cta:hover{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--ink-900);
}

.btn--ghost{
  background:transparent;
  border-color:var(--rule-dark-strong);
  color:var(--line-white);
}

.btn--ghost:hover{
  background:var(--line-white);
  border-color:var(--line-white);
  color:var(--ink-900);
}

/* 5. 面包屑 -------------------------------------------------------------- */
.breadcrumbs{
  font-size:.78rem;
  letter-spacing:.1em;
  color:var(--muted);
}

.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem}

.breadcrumbs li{display:flex;align-items:center;gap:.45rem}

.breadcrumbs li + li::before{
  content:"/";
  color:var(--rule-strong);
}

.breadcrumbs a{
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--t),border-color var(--t);
}

.breadcrumbs a:hover{color:var(--ink-900);border-bottom-color:var(--cyan)}

/* 6. 数据组件 ------------------------------------------------------------ */
.stat{display:block}

.stat__num{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(2rem,5vw,4rem);
  font-weight:600;
  line-height:1;
  letter-spacing:-.03em;
}

.stat__label{
  display:block;
  margin-top:.6rem;
  font-size:.78rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}

.section--dark .stat__label{color:rgba(247,249,244,.6)}

.stat--accent .stat__num{color:var(--amber)}

.scorecard{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1px;
  background:var(--rule-strong);
  border:1px solid var(--rule-strong);
}

.scorecard__cell{
  background:var(--paper);
  padding:1rem 1.1rem;
}

.section--dark .scorecard__cell{background:var(--ink-800)}

.scorecard__label{
  margin:0 0 .5rem;
  font-size:.74rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

.section--dark .scorecard__label{color:rgba(247,249,244,.6)}

.scorecard__value{
  margin:0;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(1.6rem,3.4vw,2.4rem);
  line-height:1.05;
  letter-spacing:-.02em;
}

.scorecard__value--accent{color:var(--amber)}

.panel{
  border:1px solid var(--rule-strong);
  background:var(--line-white);
  padding:clamp(1.15rem,2.6vw,1.8rem);
  transition:transform var(--t),border-color var(--t),background-color var(--t);
}

.panel:hover{
  transform:translateY(-4px);
  border-color:var(--ink-900);
}

.panel--dark{
  background:var(--ink-800);
  color:var(--line-white);
}

.panel--dark:hover{border-color:var(--cyan)}

.data-table__wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:.94rem;
  font-variant-numeric:tabular-nums;
}

.data-table caption{
  padding-bottom:.7rem;
  text-align:left;
  font-size:.76rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}

.data-table th,
.data-table td{
  border-bottom:1px solid var(--rule);
  padding:.65rem .7rem;
  text-align:left;
}

.data-table th{
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
}

.data-table td.num,
.data-table th.num{
  font-family:var(--font-num);
  text-align:right;
}

.data-table tbody tr:nth-child(even){background:var(--paper-dim)}

.section--dark .data-table tbody tr:nth-child(even){background:rgba(247,249,244,.05)}

.data-table tbody tr:hover{background:rgba(47,227,198,.16)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.2rem .55rem;
  border:1px solid var(--rule-strong);
  font-size:.74rem;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
}

.tag--live{
  border-color:var(--cyan);
  background:rgba(47,227,198,.18);
  color:var(--ink-900);
}

.tag--warn{
  border-color:var(--alert);
  color:var(--alert);
}

/* 7. 折叠与索引 ---------------------------------------------------------- */
.accordion{border-top:1px solid var(--rule-strong)}

.accordion__item{border-bottom:1px solid var(--rule)}

.accordion__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  width:100%;
  padding:1.05rem 0;
  border:0;
  background:none;
  font-weight:700;
  text-align:left;
  cursor:pointer;
}

.accordion__trigger::after{
  content:"+";
  font-family:var(--font-num);
  font-size:1.15rem;
  line-height:1;
  color:var(--amber);
}

.accordion__trigger[aria-expanded="true"]::after{content:"–"}

.accordion__panel{padding-bottom:1.15rem;color:var(--muted)}

.accordion__panel[hidden]{display:none}

.chapter-rail{
  position:sticky;
  top:calc(var(--nav-h) + 24px);
  display:flex;
  flex-direction:column;
  gap:.5rem;
  font-size:.82rem;
}

.chapter-rail__link{
  display:flex;
  gap:.6rem;
  padding-left:.75rem;
  border-left:1px solid var(--rule-strong);
  color:var(--muted);
  text-decoration:none;
  transition:color var(--t),border-color var(--t);
}

.chapter-rail__link:hover,
.chapter-rail__link[data-active],
.chapter-rail__link[aria-current="true"]{
  color:var(--ink-900);
  border-left-color:var(--amber);
}

/* 8. 图片容器（页面阶段放置素材） ---------------------------------------- */
.figure{margin:0}

.figure__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--rule-strong);
  background:var(--ink-800);
}

.figure__frame--wide{aspect-ratio:21 / 9}
.figure__frame--tall{aspect-ratio:4 / 5}
.figure__frame--square{aspect-ratio:1 / 1}

.figure__img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.figure__caption{
  margin-top:.65rem;
  padding-left:.65rem;
  border-left:2px solid var(--amber);
  font-size:.82rem;
  line-height:1.6;
  color:var(--muted);
}

.section--dark .figure__caption{color:rgba(247,249,244,.66)}

/* 9. 头部：双层信息导航 -------------------------------------------------- */
.site-header{position:relative;z-index:60}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:200;
  padding:.6rem 1rem;
  background:var(--amber);
  color:var(--ink-900);
  font-size:.85rem;
  font-weight:700;
  text-decoration:none;
}

.skip-link:focus{left:1rem;top:1rem}

/* 上层：品牌说明带 */
.brand-band{
  background:var(--ink-900);
  color:var(--line-white);
  border-bottom:1px solid var(--rule-dark);
}

.brand-band__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.2rem;
  min-height:46px;
  padding-block:.5rem;
  font-size:.82rem;
}

.brand-band__sig{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:.4rem .8rem;
  margin:0;
}

.brand-band__mark{
  font-weight:900;
  letter-spacing:.16em;
  color:var(--cyan);
}

.brand-band__line{
  color:rgba(247,249,244,.62);
  letter-spacing:.03em;
}

.util-nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.35rem;
  margin-left:auto;
}

.util-link{
  padding:.3rem .6rem;
  border:1px solid transparent;
  color:rgba(247,249,244,.74);
  font-size:.82rem;
  text-decoration:none;
  transition:color var(--t),border-color var(--t);
}

.util-link:hover{
  color:var(--cyan);
  border-color:var(--rule-dark-strong);
}

.brand-band .btn--cta{
  padding:.36rem .85rem;
  font-size:.8rem;
}

/* 下层：栏目带（吸顶） */
.nav-band{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--paper);
  border-bottom:1px solid var(--rule-strong);
}

.nav-band__inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(.9rem,2.4vw,1.8rem);
  min-height:var(--nav-h);
}

.nav-band__brand{
  display:none;
  font-size:1.02rem;
  font-weight:900;
  letter-spacing:.1em;
  text-decoration:none;
}

.nav-band__meta{
  display:inline-flex;
  align-items:center;
  font-size:.72rem;
  letter-spacing:.24em;
  color:var(--muted);
  white-space:nowrap;
}

.nav-band__meta::before{
  content:"";
  width:6px;
  height:6px;
  margin-right:.55rem;
  background:var(--cyan);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.45rem .7rem;
  border:1px solid var(--rule-strong);
  background:transparent;
  font-size:.76rem;
  letter-spacing:.16em;
  cursor:pointer;
  transition:background-color var(--t),color var(--t),border-color var(--t);
}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
  border-top:2px solid currentColor;
  border-bottom:2px solid currentColor;
}

.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:50%;
  border-top:2px solid currentColor;
}

.nav-toggle[aria-expanded="true"]{
  background:var(--ink-900);
  border-color:var(--ink-900);
  color:var(--line-white);
}

.primary-nav{margin-right:auto}

.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(.9rem,2.2vw,1.7rem);
}

.nav-link{
  position:relative;
  display:inline-block;
  padding:.35rem 0;
  font-size:.95rem;
  font-weight:600;
  letter-spacing:.02em;
  text-decoration:none;
  color:var(--ink-900);
  transition:color var(--t);
}

.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-4px;
  height:2px;
  background:var(--ink-900);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t),background-color var(--t);
}

.nav-link:hover::after{transform:scaleX(1)}

.nav-link[aria-current="page"]{color:var(--ink-800)}

.nav-link[aria-current="page"]::after{
  background:var(--amber);
  transform:scaleX(1);
}

.nav-band__readout{
  display:flex;
  align-items:baseline;
  gap:.5rem;
  margin:0;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--muted);
}

.nav-band__readout-value{
  font-size:.92rem;
  color:var(--ink-900);
}

.progress-rail{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(10,31,26,.08);
}

.progress-rail__fill{
  display:block;
  width:0;
  height:100%;
  background:var(--cyan);
  transition:width 120ms linear;
}

/* 10. 页脚：档案索引层 --------------------------------------------------- */
.site-footer{
  background:var(--ink-900);
  color:var(--line-white);
  border-top:1px solid var(--rule-dark-strong);
}

.site-footer__inner{
  display:grid;
  gap:clamp(2rem,4vw,3.2rem);
  padding-block:clamp(2.6rem,6vw,4.5rem);
}

.site-footer__mark{
  margin:0 0 .4rem;
  font-size:1.4rem;
  font-weight:900;
  letter-spacing:.1em;
}

.site-footer__mark::after{
  content:"";
  display:block;
  width:38px;
  height:2px;
  margin-top:.7rem;
  background:var(--amber);
}

.site-footer__tagline{
  margin:1rem 0 1.6rem;
  font-size:.9rem;
  color:rgba(247,249,244,.66);
}

.site-footer__facts{
  display:grid;
  gap:.5rem;
  margin:0;
  font-size:.8rem;
}

.site-footer__fact{
  display:flex;
  gap:.9rem;
  padding-bottom:.5rem;
  border-bottom:1px solid var(--rule-dark);
}

.site-footer__fact dt{
  min-width:5.5em;
  letter-spacing:.14em;
  color:rgba(247,249,244,.5);
}

.site-footer__fact dd{
  margin:0;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  color:var(--cyan);
}

.footer-grid{
  display:grid;
  gap:clamp(1.6rem,3vw,2.4rem);
  grid-template-columns:repeat(auto-fit,minmax(170px,1fr));
}

.footer-col__title{
  margin:0 0 1rem;
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--amber);
}

.footer-col__list{display:grid;gap:.55rem;font-size:.92rem}

.footer-col__list a{
  text-decoration:none;
  color:rgba(247,249,244,.82);
  border-bottom:1px solid transparent;
  transition:color var(--t),border-color var(--t);
}

.footer-col__list a:hover{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}

.footer-col__list--plain{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:.86rem;
  line-height:1.65;
  color:rgba(247,249,244,.82);
}

.footer-col__list--plain li{
  display:grid;
  grid-template-columns:4.6em minmax(0,1fr);
  gap:.6rem;
  word-break:break-word;
}

.footer-key{
  font-family:var(--font-sans);
  font-size:.76rem;
  letter-spacing:.12em;
  color:rgba(247,249,244,.5);
}

.footer-note{
  margin-top:1rem;
  font-size:.78rem;
  line-height:1.7;
  color:rgba(247,249,244,.5);
}

.site-footer__legal{border-top:1px solid var(--rule-dark)}

.site-footer__legal-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem 1.8rem;
  padding-block:1.05rem;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:.76rem;
  letter-spacing:.08em;
  color:rgba(247,249,244,.58);
}

.site-footer__copy,
.site-footer__icp,
.site-footer__domain{margin:0}

.site-footer__domain{color:rgba(247,249,244,.4)}

/* 11. 动效 --------------------------------------------------------------- */
.js-motion [data-reveal]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .5s ease,transform .5s ease;
}

.js-motion [data-reveal][data-revealed]{
  opacity:1;
  transform:none;
}

/* 12. 响应式 ------------------------------------------------------------- */
@media (min-width:900px){
  .site-footer__inner{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
}

@media (max-width:1024px){
  .u-span-3,.u-span-4,.u-span-5{grid-column:span 6}
  .u-span-7,.u-span-8,.u-span-9{grid-column:span 12}
}

@media (max-width:900px){
  :root{--nav-h:58px}

  .nav-band__meta{display:none}
  .nav-band__brand{display:inline-block;margin-right:auto}
  .nav-toggle{display:inline-flex}

  .nav-band__inner .primary-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    margin:0;
    padding:.4rem var(--gutter) 1.3rem;
    background:var(--ink-900);
    border-bottom:1px solid var(--rule-dark-strong);
  }

  .primary-nav[data-open]{display:block}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }

  .nav-link{
    display:block;
    padding:.85rem 0;
    border-bottom:1px solid var(--rule-dark);
    color:var(--line-white);
    font-size:1rem;
  }

  .nav-link::after{display:none}

  .nav-link[aria-current="page"]{
    color:var(--cyan);
    border-bottom-color:var(--cyan);
  }
}

@media (max-width:720px){
  body{font-size:16px}

  .brand-band__line{display:none}
  .util-nav .util-link{display:none}

  .u-span-3,.u-span-4,.u-span-5,
  .u-span-6,.u-span-7,.u-span-8,
  .u-span-9,.u-span-12{grid-column:span 12}

  .figure__frame--tall{aspect-ratio:3 / 4}
}

@media (max-width:640px){
  .nav-band__readout{display:none}

  .site-footer__legal-inner{gap:.35rem 1rem}

  .site-footer__domain{margin-left:0}
}

/* 13. 无障碍与降级 ------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }

  .panel:hover{transform:none}
  .js-motion [data-reveal]{opacity:1;transform:none}
  .progress-rail__fill{transition:none}
}