/* ============================================================
   NG体育 · 中文官方站  /assets/site.css
   共享基础层：reset、变量、排版、头部、页脚、通用组件
   视觉母题：赛场数据指挥中心 · 精密网格 · 等宽数字 · 锐利直角
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#050B0A;
  --green-900:#0A1F1A;
  --green-700:#12362C;
  --carbon:#161B1A;
  --wine:#5A1D2E;
  --indigo:#241F4A;
  --cyan:#38F2D0;
  --cyan-soft:#A8FFF0;
  --orange:#FF6A2B;
  --text:#E3EFEA;
  --text-dim:#9DB3AC;
  --line:#23372F;
  --amber:#D9A22B;
  --on-signal:#0B0604;

  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell:1440px;
  --gutter:48px;
  --header-h:76px;
  --gap:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

@media (max-width:1180px){
  :root{ --gutter:32px; }
}
@media (max-width:900px){
  :root{ --gutter:20px; --header-h:64px; --gap:16px; }
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }

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

body{
  margin:0;
  min-height:100%;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(35,55,47,.42) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(35,55,47,.42) 1px,transparent 1px);
  background-size:96px 96px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-head);
  font-size:16px;
  font-weight:400;
  line-height:1.7;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

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

h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{ color:var(--cyan); text-decoration:none; }
button{ font:inherit; color:inherit; }
table{ border-collapse:collapse; border-spacing:0; }

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

#main-content{ scroll-margin-top:calc(var(--header-h) + 16px); }

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--text);
}
h1{ font-size:clamp(38px,7vw,88px); font-weight:900; }
h2{ font-size:clamp(26px,3.6vw,44px); }
h3{ font-size:clamp(19px,2vw,26px); }
h4{ font-size:17px; }

strong{ font-weight:800; }

.prose{ max-width:68ch; }
.prose p{ margin-bottom:1em; color:var(--text); }
.prose p:last-child{ margin-bottom:0; }
.prose a{ border-bottom:1px solid rgba(56,242,208,.45); }
.prose a:hover{ border-bottom-color:var(--cyan); }

/* ---------- 4. 布局骨架 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

.section{
  position:relative;
  padding:112px 0;
}
@media (max-width:900px){
  .section{ padding:72px 0; }
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.span-2{ grid-column:span 2; }
.span-3{ grid-column:span 3; }
.span-4{ grid-column:span 4; }
.span-5{ grid-column:span 5; }
.span-6{ grid-column:span 6; }
.span-7{ grid-column:span 7; }
.span-8{ grid-column:span 8; }
.span-9{ grid-column:span 9; }
.span-10{ grid-column:span 10; }
.span-12{ grid-column:span 12; }

@media (max-width:980px){
  .grid-12{ grid-template-columns:1fr; }
  .span-2,.span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-10,.span-12{
    grid-column:1 / -1;
  }
}

/* ---------- 5. 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  display:inline-block;
  padding:11px 18px;
  background:var(--orange);
  color:var(--on-signal);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  transition:top .18s var(--ease);
}
.skip-link:focus{
  top:14px;
  outline:2px solid var(--cyan);
  outline-offset:2px;
}

/* ---------- 6. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background-color:transparent;
  background-image:linear-gradient(180deg,rgba(5,11,10,.94),rgba(5,11,10,0));
  border-bottom:1px solid transparent;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.site-header[data-scrolled="true"]{
  background-color:var(--carbon);
  background-image:none;
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px rgba(5,11,10,.6);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan) 0,rgba(56,242,208,.35) 14%,transparent 14%,transparent 100%);
  opacity:0;
  transition:opacity .18s var(--ease);
  pointer-events:none;
}
.site-header[data-scrolled="true"]::after{ opacity:1; }

.site-header__inner{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  min-height:var(--header-h);
  padding:0 var(--gutter);
  display:flex;
  align-items:center;
  gap:28px;
}

/* 品牌 */
.brand{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:13px;
  color:var(--text);
  text-decoration:none;
}
.brand:hover .brand__mark{ background:var(--cyan-soft); }
.brand__mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
  transition:background-color .16s var(--ease);
}
.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.2;
}
.brand__line{
  font-size:15px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
  white-space:nowrap;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--text-dim);
}

/* 导航 */
.site-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav__link{
  position:relative;
  display:block;
  padding:10px 12px;
  color:var(--text-dim);
  font-size:14px;
  font-weight:600;
  letter-spacing:.015em;
  white-space:nowrap;
  transition:color .16s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:3px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.site-nav__link:hover{ color:var(--text); }
.site-nav__link:hover::after{ transform:scaleX(1); }
.site-nav__link[aria-current="page"]{ color:var(--text); }
.site-nav__link[aria-current="page"]::after{ transform:scaleX(1); }

/* 数据止期印章 */
.header-stamp{
  flex:0 0 auto;
  margin-left:26px;
  padding:6px 11px;
  border:1px solid var(--line);
  background:rgba(10,31,26,.6);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  cursor:pointer;
}
.nav-toggle:hover{ border-color:var(--cyan); color:var(--cyan); }
.nav-toggle__bars{
  display:block;
  width:16px;
  height:2px;
  background:var(--cyan);
  box-shadow:0 -5px 0 var(--cyan),0 5px 0 var(--cyan);
  transition:box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{
  background:var(--orange);
  box-shadow:0 -5px 0 var(--orange),0 5px 0 var(--orange);
}
.nav-toggle__text{ line-height:1; }

@media (max-width:1280px){
  .site-nav__link{ font-size:13px; padding:10px 9px; }
  .site-nav__link::after{ left:9px; right:9px; }
  .header-stamp{ margin-left:18px; }
}

@media (max-width:980px){
  .brand__sub{ display:none; }
  .header-stamp{ display:none; }
  .nav-toggle{ display:flex; }

  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    margin-left:0;
    display:block;
    background:var(--carbon);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    visibility:hidden;
    opacity:0;
    max-height:0;
    overflow:hidden;
    transition:opacity .18s var(--ease),max-height .24s var(--ease),visibility .18s linear;
  }
  .site-nav[data-open="true"]{
    visibility:visible;
    opacity:1;
    max-height:min(560px,calc(100vh - var(--header-h)));
    overflow-y:auto;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--gutter) 18px;
  }
  .site-nav__item + .site-nav__item{ border-top:1px solid var(--line); }
  .site-nav__link{
    padding:15px 0;
    font-size:16px;
    font-weight:700;
  }
  .site-nav__link::after{
    left:0;
    right:auto;
    bottom:9px;
    width:26px;
  }
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  background-color:var(--carbon);
  background-image:
    linear-gradient(180deg,rgba(10,31,26,.85),rgba(22,27,26,0) 220px),
    linear-gradient(to right,rgba(35,55,47,.5) 1px,transparent 1px);
  background-size:auto,96px 100%;
  border-top:1px solid var(--line);
  color:var(--text-dim);
}
.site-footer__shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:68px var(--gutter) 30px;
}

.site-footer__grid{
  display:grid;
  grid-template-columns:1.5fr .85fr .85fr 1.4fr;
  gap:52px 40px;
}
@media (max-width:1180px){
  .site-footer__grid{ grid-template-columns:1fr 1fr; gap:44px 32px; }
}
@media (max-width:640px){
  .site-footer__grid{ grid-template-columns:1fr; gap:36px; }
}

/* 页脚品牌 */
.footer-brand{ min-width:0; }
.footer-brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  margin-bottom:16px;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.footer-brand__name{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
  line-height:1.35;
}
.footer-brand__desc{
  margin-top:10px;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.75;
  color:var(--text-dim);
}
.footer-brand__copy{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--text-dim);
}

/* 页脚栏目 */
.footer-col__title{
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-col__list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-col__link{
  display:inline-block;
  color:var(--text-dim);
  font-size:14px;
  line-height:1.5;
  border-left:2px solid transparent;
  padding-left:0;
  transition:color .16s var(--ease),border-color .16s var(--ease),padding-left .16s var(--ease);
}
.footer-col__link:hover{
  color:var(--cyan);
  border-left-color:var(--cyan);
  padding-left:9px;
}

/* 页脚联系块 */
.footer-contact__line{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
  margin-bottom:9px;
  font-size:13.5px;
  color:var(--text);
  word-break:break-word;
}
.footer-contact__key{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.footer-contact__note{
  margin-top:14px;
  padding:12px 14px;
  border:1px solid var(--line);
  border-left:3px solid var(--amber);
  background:rgba(10,31,26,.75);
  font-size:12.5px;
  line-height:1.7;
  color:var(--text-dim);
}

/* 页脚底栏 */
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 32px;
  margin-top:56px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.site-footer__legal{
  font-size:12.5px;
  color:var(--text-dim);
}
.site-footer__closing{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
  white-space:nowrap;
}
@media (max-width:640px){
  .site-footer__shell{ padding-top:52px; }
  .site-footer__closing{ white-space:normal; }
}

/* ---------- 8. 通用组件 ---------- */
.label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.label--dim{ color:var(--text-dim); }
.label--signal{ color:var(--orange); }

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border:1px solid var(--line);
  background:var(--green-900);
  color:var(--text-dim);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag--cyan{ border-color:rgba(56,242,208,.5); color:var(--cyan); }
.tag--orange{ border-color:rgba(255,106,43,.55); color:var(--orange); }

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  cursor:pointer;
  transition:transform .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease),background-color .16s var(--ease);
}
.btn:hover{
  transform:translateY(-2px);
  border-color:var(--cyan);
  color:var(--cyan);
}
.btn--signal{
  background:var(--orange);
  border-color:var(--orange);
  color:var(--on-signal);
  font-weight:700;
}
.btn--signal:hover{
  background:transparent;
  color:var(--orange);
}
.btn--ghost{ color:var(--text-dim); }
.btn--cyan{ border-color:rgba(56,242,208,.6); color:var(--cyan); }

.stat{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(34px,5vw,64px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--cyan);
  border-bottom:1px solid rgba(56,242,208,.35);
  padding-bottom:10px;
  align-self:flex-start;
}
.stat__num--signal{
  color:var(--orange);
  border-bottom-color:rgba(255,106,43,.4);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-dim);
}

.panel{
  position:relative;
  padding:28px;
  border:1px solid var(--line);
  background:var(--green-900);
  transition:transform .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.panel:hover{
  transform:translateY(-2px);
  border-color:var(--cyan);
}
.panel--overlap{
  margin-top:-48px;
  z-index:2;
}
.panel--wine{ background:var(--wine); }
.panel--indigo{ background:var(--indigo); }
.panel--clip{
  clip-path:polygon(0 0,100% 2.2%,100% 100%,0 97.8%);
}
@media (max-width:900px){
  .panel{ padding:20px; }
  .panel--overlap{ margin-top:-24px; }
  .panel--clip{ clip-path:none; }
}

.callout{
  display:flex;
  flex-wrap:wrap;
  gap:6px 14px;
  padding:15px 18px;
  border:1px solid var(--line);
  border-left:3px solid var(--amber);
  background:var(--green-900);
  font-size:13.5px;
  line-height:1.7;
  color:var(--text-dim);
}
.callout__key{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--amber);
}
.callout--gap{
  border-left-color:var(--orange);
}
.callout--gap .callout__key{ color:var(--orange); }

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.breadcrumb__link{
  color:var(--text-dim);
  transition:color .16s var(--ease);
}
.breadcrumb__link:hover{ color:var(--cyan); }
.breadcrumb__sep{ color:var(--line); }
.breadcrumb__current{ color:var(--cyan); }

.data-table{
  width:100%;
  font-size:14px;
  border:1px solid var(--line);
}
.data-table caption{
  padding-bottom:12px;
  text-align:left;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.data-table th,
.data-table td{
  padding:11px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.data-table thead th{
  background:var(--green-700);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.13em;
  text-transform:uppercase;
  color:var(--text-dim);
  white-space:nowrap;
}
.data-table tbody tr:nth-child(even){ background:rgba(18,54,44,.42); }
.data-table tbody tr:hover{ background:rgba(56,242,208,.08); }
.data-table td.num{
  font-family:var(--font-mono);
  color:var(--cyan);
  text-align:right;
  white-space:nowrap;
}
.data-table td.num--signal{ color:var(--orange); }
.data-table tbody tr:last-child td{ border-bottom:none; }

/* ---------- 9. 图片容器（供页面阶段放置占位） ---------- */
.figure{
  position:relative;
  margin:0;
  border:1px solid var(--line);
  background:var(--green-900);
  overflow:hidden;
}
.figure__img{
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  object-fit:cover;
  background-image:linear-gradient(135deg,var(--green-700) 0%,var(--green-900) 55%,var(--ink) 100%);
  filter:saturate(.88) contrast(1.06);
}
.figure--tall .figure__img{ aspect-ratio:3 / 4; }
.figure--square .figure__img{ aspect-ratio:1 / 1; }
.figure--wide .figure__img{ aspect-ratio:21 / 9; }
.figure--tilt{
  clip-path:polygon(0 0,100% 2.4%,100% 100%,0 97.6%);
}
.figure__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 16px;
  background:linear-gradient(180deg,rgba(5,11,10,0),rgba(5,11,10,.94) 70%);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--cyan-soft);
}
@media (max-width:900px){
  .figure--tilt{ clip-path:none; }
}

/* ---------- 10. 状态与工具 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:80;
  width:0;
  height:2px;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(56,242,208,.6);
  pointer-events:none;
}

.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:70;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  padding:0;
  background:var(--carbon);
  border:1px solid var(--line);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:16px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transition:opacity .2s var(--ease),visibility .2s linear,border-color .16s var(--ease);
}
.to-top[data-visible="true"]{
  opacity:1;
  visibility:visible;
}
.to-top:hover{ border-color:var(--cyan); }
@media (max-width:640px){
  .to-top{ right:14px; bottom:14px; width:40px; height:40px; }
}

/* ---------- 11. 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{ opacity:1; transform:none; }
  .panel:hover,
  .btn:hover{ transform:none; }
}