/* =========================================================
   N体育赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中英混排 / 命令栏 / 页脚 / 通用组件
   ========================================================= */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;border-spacing:0}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--signal-cyan);
  outline-offset:2px;
  border-radius:0;
}

/* ---------- 变量 ---------- */
:root{
  --deep-field:#08120F;
  --graphite:#14181B;
  --moss-line:#1E3A32;
  --slate-line:#2A3237;
  --turf:#1B6B52;
  --signal-cyan:#2FE0C8;
  --cyan-soft:#8FF3E6;
  --amber:#FF8A3D;
  --paper:#F2F5F4;
  --ink:#E8EFED;
  --muted:#93A6A0;
  --alert:#D64545;

  --font-display:"Archivo Narrow","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --wrap:1320px;
  --wrap-narrow:780px;
  --gutter:24px;
  --hair:1px solid var(--slate-line);
  --ease:cubic-bezier(.2,.8,.3,1);
  --t-fast:160ms;
  --header-h:68px;
}

/* ---------- 基础排版 ---------- */
html{scroll-behavior:smooth}
body{
  background:var(--deep-field);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.005em;
  line-height:1.18;
  color:var(--ink);
}
h1{font-size:clamp(28px,4vw,52px)}
h2{font-size:clamp(22px,2.6vw,34px)}
h3{font-size:clamp(18px,1.8vw,22px)}
p{max-width:40em}
strong,b{font-weight:700}
small{font-size:.8125rem}
code,kbd,pre,.num,[data-num]{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:500;
}
::selection{background:var(--signal-cyan);color:var(--deep-field)}

/* ---------- 布局容器 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--narrow{max-width:var(--wrap-narrow)}
#main-content{display:block}

.section{padding-block:clamp(56px,7vw,96px);border-top:var(--hair)}
.section__head{display:flex;flex-direction:column;gap:10px;position:relative;margin-bottom:40px}
.section__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--signal-cyan);
  font-variant-numeric:tabular-nums;
}
.section__title{position:relative;display:inline-block;padding-bottom:14px}
.section__title::after{
  content:"";position:absolute;left:0;bottom:0;width:56px;height:2px;background:var(--turf);
}
.section__note{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--muted);
}
.rule{height:1px;background:var(--slate-line);border:0;width:100%}

.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-display);
  font-weight:700;font-size:14px;letter-spacing:.04em;
  padding:11px 18px;border:1px solid transparent;
  transition:color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.btn--primary{
  background:var(--signal-cyan);color:#04100D;border-color:var(--signal-cyan);
}
.btn--primary:hover{background:var(--cyan-soft);border-color:var(--cyan-soft)}
.btn--ghost{
  background:transparent;color:var(--ink);border-color:var(--slate-line);
}
.btn--ghost:hover{color:var(--cyan-soft);border-color:var(--signal-cyan)}
.btn--sm{padding:8px 14px;font-size:13px}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  padding:3px 8px;border:1px solid var(--slate-line);color:var(--muted);
  background:rgba(20,24,27,.6);
}
.tag--cyan{color:var(--signal-cyan);border-color:rgba(47,224,200,.45)}
.tag--amber{color:var(--amber);border-color:rgba(255,138,61,.5)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:18px;border-bottom:var(--hair)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em}
.breadcrumb__item+ .breadcrumb__item::before{content:"/";color:var(--slate-line)}
.breadcrumb__link{color:var(--muted);transition:color var(--t-fast) var(--ease)}
.breadcrumb__link:hover{color:var(--signal-cyan)}
.breadcrumb__current{color:var(--cyan-soft)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--moss-line);
  border:1px solid var(--slate-line);
  padding:20px 22px;
  transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--signal-cyan)}
.card--float{
  background:var(--graphite);
  border-color:rgba(47,224,200,.55);
  box-shadow:0 18px 40px rgba(0,0,0,.45);
}
.card__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--muted);margin-bottom:10px;
}
.card__value{
  font-family:var(--font-mono);font-weight:500;font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3vw,40px);line-height:1.1;color:var(--ink);
}
.card__meta{font-size:13px;color:var(--muted);margin-top:8px}

/* ---------- 锚点导航（长文页使用） ---------- */
.anchor-nav{display:flex;flex-direction:column;gap:2px}
.anchor-nav__link{
  display:block;padding:8px 12px;font-size:13px;color:var(--muted);
  border-left:2px solid transparent;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),
             background-color var(--t-fast) var(--ease);
}
.anchor-nav__link:hover{color:var(--cyan-soft);background:rgba(47,224,200,.06)}
.anchor-nav__link.is-current{
  color:var(--signal-cyan);border-left-color:var(--signal-cyan);
  background:rgba(47,224,200,.08);
}

/* ---------- 图片容器（页面阶段填充） ---------- */
.media{
  position:relative;border:1px solid var(--slate-line);
  background:linear-gradient(160deg,#0C1A16 0%,var(--graphite) 100%);
  overflow:hidden;
}
.media__frame{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(150deg,var(--turf) 0%,#0D211C 60%,var(--graphite) 100%);
}
.media--4x3 .media__frame{aspect-ratio:4/3}
.media--1x1 .media__frame{aspect-ratio:1/1}
.media--21x9 .media__frame{aspect-ratio:21/9}
.media__img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.82) contrast(1.06) brightness(.86);
}
.media__grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(47,224,200,.10) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(47,224,200,.10) 1px,transparent 1px);
  background-size:48px 48px;
  mix-blend-mode:screen;
}
.media__tag{
  position:absolute;top:12px;left:12px;z-index:2;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  padding:3px 8px;background:rgba(8,18,15,.82);
  border:1px solid rgba(47,224,200,.45);color:var(--cyan-soft);
}
.media__caption{
  padding:12px 14px;font-size:12px;color:var(--muted);
  font-family:var(--font-mono);letter-spacing:.04em;
  border-top:var(--hair);
}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:60;
  background:transparent;pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:var(--signal-cyan);
  transform-origin:0 50%;
}

/* ---------- 显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 无障碍隐藏 ---------- */
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* =========================================================
   头部命令栏
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(8,18,15,.95);
  border-bottom:1px solid var(--slate-line);
  backdrop-filter:blur(10px);
}
.skip-link{
  position:absolute;left:16px;top:0;z-index:80;
  transform:translateY(-120%);
  background:var(--signal-cyan);color:#04100D;
  font-family:var(--font-display);font-weight:700;font-size:13px;letter-spacing:.04em;
  padding:10px 16px;
  transition:transform var(--t-fast) var(--ease);
}
.skip-link:focus-visible{transform:translateY(8px)}

.header-rail{
  background:#0A1714;
  border-bottom:1px solid var(--slate-line);
}
.header-rail__inner{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:32px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.rail-status{display:inline-flex;align-items:center;gap:8px;color:var(--cyan-soft)}
.rail-dot{
  width:6px;height:6px;background:var(--signal-cyan);display:inline-block;
  box-shadow:0 0 0 3px rgba(47,224,200,.16);
  animation:rail-pulse 2.4s ease-in-out infinite;
}
@keyframes rail-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(47,224,200,.16)}
  50%{opacity:.55;box-shadow:0 0 0 5px rgba(47,224,200,.06)}
}
.rail-meta{color:var(--muted)}

.header-bar{position:relative;border-bottom:0}
.header-bar__inner{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;align-items:center;gap:24px;
}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  width:34px;height:34px;display:grid;place-items:center;
  background:linear-gradient(160deg,var(--turf) 0%,#0C231C 100%);
  border:1px solid rgba(47,224,200,.38);
  color:var(--cyan-soft);
  font-family:var(--font-display);font-weight:900;font-size:17px;letter-spacing:0;
}
.brand__name{
  font-family:var(--font-display);font-weight:800;font-size:18px;
  letter-spacing:.02em;color:var(--ink);white-space:nowrap;
}
.brand__version{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;
  color:var(--cyan-soft);border:1px solid rgba(47,224,200,.4);
  padding:3px 7px;white-space:nowrap;background:rgba(47,224,200,.05);
}

.main-nav{flex:1 1 auto;min-width:0}
.main-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.main-nav__list::-webkit-scrollbar{display:none}
.main-nav__item{display:block;flex:0 0 auto}
.main-nav__link{
  position:relative;display:block;
  padding:9px 12px;
  font-size:14px;line-height:1.4;color:var(--muted);white-space:nowrap;
  transition:color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.main-nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--signal-cyan);transform:scaleX(0);transform-origin:0 50%;
  transition:transform var(--t-fast) var(--ease);
}
.main-nav__link:hover{color:var(--cyan-soft);background:rgba(47,224,200,.06)}
.main-nav__link:hover::after{transform:scaleX(1)}
.main-nav__link[aria-current="page"]{color:var(--signal-cyan);background:rgba(47,224,200,.08)}
.main-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto}
.header-flag{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted);
  white-space:nowrap;
}
.header-flag::before{
  content:"";width:5px;height:5px;background:var(--signal-cyan);display:inline-block;
}
.header-cta{white-space:nowrap}

.nav-toggle{
  display:none;
  width:42px;height:42px;place-items:center;
  border:1px solid var(--slate-line);background:rgba(20,24,27,.7);
  transition:border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.nav-toggle:hover{border-color:var(--signal-cyan);background:rgba(47,224,200,.08)}
.nav-toggle__bars{display:grid;gap:5px;width:18px}
.nav-toggle__bar{
  display:block;height:1px;width:100%;background:var(--ink);
  transition:transform var(--t-fast) var(--ease),opacity var(--t-fast) var(--ease);
}
.site-header[data-open] .nav-toggle{border-color:var(--signal-cyan)}
.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)}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  background:var(--deep-field);
  border-top:1px solid var(--slate-line);
  color:var(--ink);
  padding-top:clamp(48px,6vw,72px);
  margin-top:clamp(48px,6vw,96px);
}
.footer__inner{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1.25fr;
  gap:40px;
  padding-bottom:48px;
  border-bottom:1px solid var(--slate-line);
}
.footer-col{display:flex;flex-direction:column;gap:12px;min-width:0}
.footer-col__index{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--signal-cyan);font-variant-numeric:tabular-nums;
}
.footer-col__title{
  font-family:var(--font-display);font-weight:800;font-size:15px;
  letter-spacing:.06em;color:var(--ink);text-transform:none;
}
.footer-brand__name{
  font-family:var(--font-display);font-weight:900;font-size:22px;color:var(--ink);
}
.footer-brand__desc{font-size:13.5px;line-height:1.8;color:var(--muted);max-width:34em}
.footer-brand__icp{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--muted);
  border-left:2px solid var(--turf);padding-left:10px;
}
.footer__links{display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}
.footer__link{
  display:inline-block;font-size:13.5px;color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.footer__link:hover{color:var(--signal-cyan);border-bottom-color:var(--signal-cyan)}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.contact-item{display:flex;flex-direction:column;gap:2px}
.contact-item__label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--muted);
}
.contact-item__value{
  font-family:var(--font-mono);font-size:13.5px;letter-spacing:.02em;color:var(--ink);
  font-variant-numeric:tabular-nums;word-break:break-word;
}
.footer-col__cta{align-self:flex-start;margin-top:6px}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-block:20px 28px;
}
.footer__version,.footer__note{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted);
}
.footer__note{color:var(--muted);opacity:.85}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .header-flag{display:none}
}
@media (max-width:1000px){
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-col:first-child{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--header-h:60px;--gutter:16px}
  .header-rail__inner{min-height:30px;font-size:10.5px;letter-spacing:.1em}
  .rail-meta{display:none}
  .header-bar__inner{gap:12px}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    background:var(--graphite);
    border-top:1px solid var(--slate-line);
    border-bottom:1px solid var(--slate-line);
    padding:6px 0 14px;
    max-height:calc(100vh - 100px);
    overflow-y:auto;
    box-shadow:0 24px 40px rgba(0,0,0,.5);
  }
  .main-nav[data-open]{display:block}
  .main-nav__list{flex-direction:column;align-items:stretch;gap:0;overflow:visible}
  .main-nav__link{
    padding:13px var(--gutter);
    font-size:15px;
    border-left:2px solid transparent;
  }
  .main-nav__link::after{display:none}
  .main-nav__link:hover{background:rgba(47,224,200,.06)}
  .main-nav__link[aria-current="page"]{
    border-left-color:var(--signal-cyan);
    color:var(--signal-cyan);
    background:rgba(47,224,200,.08);
  }
  .nav-toggle{display:grid}
  .header-cta{display:none}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-3,.col-4{grid-column:span 3}
  .col-6,.col-8{grid-column:span 6}
  .section{padding-block:48px}
  .section__head{margin-bottom:28px}
}
@media (max-width:640px){
  .brand__version{display:none}
  .footer__links{grid-template-columns:1fr}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .grid--12{grid-template-columns:1fr}
  .col-3,.col-4,.col-6,.col-8{grid-column:span 1}
}
@media (min-width:901px){
  .section__note{
    position:absolute;right:0;top:6px;
    writing-mode:vertical-rl;
    text-orientation:mixed;
    padding-left:10px;
    border-left:1px solid var(--slate-line);
  }
}

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