/* ==========================================================================
   NG体育入口 · 共享样式 /assets/site.css
   01 变量  02 重置  03 排版  04 组件  05 头部  06 页脚  07 动效  08 响应式
   ========================================================================== */

/* 01 · 设计变量 ----------------------------------------------------------- */
:root{
  --ink:#071426;
  --panel:#0C1E34;
  --cyan:#38F2CF;
  --orange:#FF7A2F;
  --paper:#F2E9DA;
  --mist:#8CA3BC;
  --teal:#0B5D57;
  --red:#FF5A5F;
  --white:#F8FBFF;
  --shadow:#02060C;
  --text:#D6E3F0;
  --line:rgba(140,163,188,.22);
  --line-cyan:rgba(56,242,207,.30);
  --font-sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1440px;
  --pad:32px;
  --hard-shadow:4px 4px 0 var(--shadow);
  --ease:cubic-bezier(.22,1,.36,1);
}

/* 02 · 重置 --------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
::selection{background:var(--cyan);color:var(--ink)}
#main-content{display:block;scroll-margin-top:132px}

/* 03 · 基础排版 ----------------------------------------------------------- */
body{
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  font-weight:400;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(920px 520px at 84% -10%, rgba(56,242,207,.10), transparent 62%),
    repeating-linear-gradient(90deg, rgba(140,163,188,.055) 0 1px, transparent 1px 120px);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  min-height:100vh;
}
h1,h2,h3,h4,h5{
  color:var(--white);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.16;
  text-wrap:balance;
}
h1{font-size:clamp(1.75rem,4.4vw,2.5rem)}
h2{font-size:clamp(1.5rem,3.1vw,2rem)}
h3{font-size:clamp(1.25rem,2.2vw,1.5rem)}
h4{font-size:1.0625rem;letter-spacing:-.01em}
h5{font-size:.9375rem;letter-spacing:0}
strong{font-weight:700;color:var(--white)}

/* 04 · 通用组件 ----------------------------------------------------------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.container--narrow{max-width:920px}
.section{padding-block:clamp(48px,7vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,48px)}
.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--cyan)}
.lead{font-size:1.0625rem;line-height:1.8;color:var(--white);max-width:60ch}

.panel{
  background:var(--panel);
  border:2px solid var(--line-cyan);
  box-shadow:var(--hard-shadow);
  padding:24px;
}
.paper-block{
  background:var(--paper);
  color:#12293F;
  border:2px solid var(--shadow);
  box-shadow:var(--hard-shadow);
  padding:clamp(24px,4vw,48px);
}

.prose{max-width:68ch;font-size:1rem;line-height:1.85;color:var(--text)}
.prose > * + *{margin-top:1.1em}
.prose h2,.prose h3{color:var(--white);margin-top:1.6em}
.prose h2{font-size:clamp(1.35rem,2.6vw,1.75rem)}
.prose h3{font-size:clamp(1.125rem,2vw,1.3rem)}
.prose ul,.prose ol{list-style:disc;padding-left:1.2em}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.45em}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{background:rgba(56,242,207,.14)}
.prose code{font-family:var(--font-mono);font-size:.8125rem;background:var(--panel);border:1px solid var(--line);padding:.1em .45em}
.prose--paper{color:#12293F}
.prose--paper h2,.prose--paper h3,.prose--paper strong{color:#071426}
.prose--paper a{color:var(--teal)}
.prose--paper code{background:rgba(7,20,38,.08);border-color:rgba(7,20,38,.22)}

.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(--mist);
}
.breadcrumb a{color:var(--mist);border-bottom:1px solid transparent;padding-bottom:1px}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb__sep{color:rgba(140,163,188,.5)}
.breadcrumb [aria-current="page"]{color:var(--cyan)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  letter-spacing:.08em;line-height:1.2;
  padding:11px 16px;
  border:2px solid var(--cyan);
  background:transparent;
  color:var(--cyan);
  box-shadow:var(--hard-shadow);
  transition:transform .12s ease,box-shadow .12s ease,background-color .12s ease,color .12s ease,border-color .12s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--shadow);background:rgba(56,242,207,.12)}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 var(--shadow)}
.btn--primary{background:var(--orange);border-color:var(--orange);color:var(--ink)}
.btn--primary:hover{background:#ff9257;border-color:#ff9257;color:var(--ink)}
.btn--ghost{border-color:var(--line);color:var(--text);box-shadow:none}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(56,242,207,.08);transform:none;box-shadow:none}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:10px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;
  padding:3px 8px;border:1px solid var(--cyan);color:var(--cyan);
}
.tag--orange{border-color:var(--orange);color:var(--orange)}

.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--panel);
  border:2px solid rgba(140,163,188,.35);
  box-shadow:var(--hard-shadow);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg, rgba(56,242,207,.10) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(56,242,207,.10) 0 1px, transparent 1px 40px);
}
.media-frame img,.media-frame svg{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-caption{
  margin-top:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--mist);
}

/* 05 · 头部 --------------------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,20,38,.94);
  border-bottom:2px solid var(--line-cyan);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  transition:box-shadow .18s ease;
}
.site-header[data-scrolled="true"]{box-shadow:0 6px 0 rgba(2,6,12,.55)}
.site-header[data-nav-open="true"]{border-bottom-color:var(--orange)}

.skip-link{
  position:absolute;top:4px;left:16px;z-index:200;
  display:inline-block;
  padding:10px 16px;
  background:var(--cyan);color:var(--ink);
  border:2px solid var(--ink);
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.06em;
  transform:translateY(-240%);
  transition:transform .16s ease;
}
.skip-link:focus{transform:translateY(0)}

.header__rail{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:7px var(--pad);
  font-family:var(--font-mono);font-size:10.5px;font-weight:500;
  letter-spacing:.14em;color:var(--mist);
  border-bottom:1px solid rgba(140,163,188,.14);
}
.rail__coord{white-space:nowrap}
.rail__status{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);white-space:nowrap}
.rail__ver{white-space:nowrap}
.dot{
  width:6px;height:6px;flex:none;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(56,242,207,.18);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(56,242,207,.18)}
  50%{opacity:.45;box-shadow:0 0 0 6px rgba(56,242,207,.06)}
}

.header__main{
  position:relative;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:24px;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:14px var(--pad);
}

.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  display:inline-grid;place-items:center;flex:none;
  width:44px;height:44px;
  background:var(--cyan);color:var(--ink);
  border:2px solid var(--cyan);
  box-shadow:3px 3px 0 var(--shadow);
  font-family:var(--font-mono);font-size:15px;font-weight:700;letter-spacing:.02em;
  transition:background-color .12s ease,border-color .12s ease,color .12s ease;
}
.brand__mark--lg{width:56px;height:56px;font-size:18px}
.brand:hover .brand__mark{background:var(--orange);border-color:var(--orange);color:var(--ink)}
.brand__text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand__name{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--white);white-space:nowrap}
.brand__meta{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--mist);white-space:nowrap}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 12px;
  background:var(--panel);
  border:2px solid var(--line-cyan);
  color:var(--cyan);
  box-shadow:3px 3px 0 var(--shadow);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:var(--cyan);transition:transform .18s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

.site-nav{display:flex;align-items:center;justify-self:center;min-width:0}
.site-nav__list{display:flex;align-items:center;gap:2px;counter-reset:navidx}
.site-nav__item{display:flex;counter-increment:navidx}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 10px;
  border:2px solid transparent;
  font-size:13px;font-weight:500;color:var(--text);white-space:nowrap;
  transition:color .12s ease,border-color .12s ease,background-color .12s ease,transform .12s ease;
}
.nav-link::before{
  content:"0" counter(navidx);
  font-family:var(--font-mono);font-size:10px;font-weight:500;
  letter-spacing:.06em;color:var(--mist);
}
.nav-link:hover{color:var(--cyan);border-color:var(--line-cyan);transform:translateY(-2px)}
.nav-link:hover::before{color:var(--cyan)}
.nav-link[aria-current="page"]{
  background:var(--cyan);border-color:var(--cyan);
  color:var(--ink);font-weight:700;
}
.nav-link[aria-current="page"]::before{color:rgba(7,20,38,.62)}

.header__aside{display:flex;align-items:center;gap:16px;justify-self:end;min-width:0}
.utility{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 10px;
  border:1px dashed rgba(140,163,188,.38);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--mist);
  white-space:nowrap;
}
.utility__key{
  display:inline-grid;place-items:center;
  min-width:18px;height:18px;padding:0 4px;
  border:1px solid var(--line-cyan);
  color:var(--cyan);font-weight:700;
}
.header__cta{white-space:nowrap;font-size:11px;padding:9px 13px}

/* 06 · 页脚 --------------------------------------------------------------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,88px);
  background:var(--panel);
  border-top:2px solid var(--cyan);
  color:var(--text);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg, rgba(140,163,188,.09) 0 1px, transparent 1px 72px),
    radial-gradient(720px 320px at 12% 0%, rgba(56,242,207,.08), transparent 70%);
}
.footer__grid{
  position:relative;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:40px 32px;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:56px var(--pad) 40px;
}
.footer__brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.footer__brandname{
  font-size:1.0625rem;font-weight:800;letter-spacing:-.01em;
  color:var(--white);line-height:1.3;
}
.footer__tagline{
  font-size:.9375rem;line-height:1.7;color:var(--text);
  max-width:26ch;
  border-left:2px solid var(--cyan);padding-left:12px;
}
.footer__meta{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  color:var(--mist);line-height:1.9;
}
.footer__col{min-width:0}
.footer__title{
  margin-bottom:16px;padding-bottom:8px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--mist);
}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__item{min-width:0}
.footer__link{
  display:inline-block;
  font-size:.875rem;color:var(--text);
  border-bottom:1px solid transparent;
  transition:color .12s ease,border-color .12s ease,transform .12s ease;
}
.footer__link:hover{color:var(--cyan);border-bottom-color:var(--cyan);transform:translateX(2px)}
.footer__contact .footer__list{gap:14px}
.footer__row{
  display:grid;grid-template-columns:44px minmax(0,1fr);
  gap:4px 10px;align-items:baseline;
}
.footer__label{
  font-family:var(--font-mono);font-size:10px;font-weight:500;
  letter-spacing:.14em;color:var(--mist);
}
.footer__value{
  font-size:.875rem;line-height:1.6;color:var(--white);
  overflow-wrap:anywhere;
}
.footer__note{
  margin-top:16px;padding-top:12px;
  border-top:1px dashed rgba(140,163,188,.28);
  font-size:.75rem;line-height:1.8;color:var(--mist);
  max-width:34ch;
}
.footer__bottom{
  position:relative;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:18px var(--pad) 28px;
  border-top:1px solid var(--line);
}
.footer__legal{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.08em;color:var(--mist);
}

/* 07 · 动效 --------------------------------------------------------------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:120;
  width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  pointer-events:none;
  transition:transform .08s linear;
}
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s ease,transform .5s var(--ease);
  will-change:opacity,transform;
}
html.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

@keyframes navDrop{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:none}
}

@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.js-reveal [data-reveal]{transform:none;opacity:0;transition:opacity .12s linear}
  html.js-reveal [data-reveal].is-visible{opacity:1}
  .btn:hover,.nav-link:hover,.footer__link:hover{transform:none}
  .scroll-progress{transition:none}
}

/* 08 · 响应式 ------------------------------------------------------------- */
@media (max-width:1199px){
  .utility{display:none}
  .nav-link{padding:7px 8px;font-size:12px}
  .nav-link::before{display:none}
  .header__main{gap:16px}
}

@media (max-width:1023px){
  .header__main{
    grid-template-columns:1fr auto auto;
    gap:12px;
    padding:12px var(--pad);
  }
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    padding:8px 16px 18px;
    background:var(--panel);
    border-top:2px solid var(--cyan);
    border-bottom:2px solid var(--cyan);
    box-shadow:0 12px 0 rgba(2,6,12,.55);
    max-height:calc(100vh - 132px);
    overflow-y:auto;
  }
  .site-nav[data-open="true"]{display:block;animation:navDrop .24s var(--ease)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{width:100%}
  .nav-link{
    display:flex;justify-content:flex-start;
    width:100%;padding:14px 10px;
    border:2px solid transparent;
    border-bottom:1px solid var(--line);
    font-size:14px;
  }
  .nav-link::before{display:inline-block;font-size:10px}
  .nav-link:hover{transform:none;border-color:transparent;border-bottom-color:var(--line)}
  .nav-link[aria-current="page"]{border-bottom-color:var(--cyan)}
  .footer__grid{grid-template-columns:1fr 1fr;gap:36px 28px;padding-top:44px}
  .footer__brand{grid-column:1 / -1}
}

@media (max-width:767px){
  :root{--pad:20px}
  #main-content{scroll-margin-top:112px}
  .header__rail{font-size:9.5px;letter-spacing:.1em;padding:6px var(--pad)}
  .rail__status{display:none}
  .brand__mark{width:38px;height:38px;font-size:13px}
  .brand__mark--lg{width:48px;height:48px;font-size:16px}
  .brand__name{font-size:14px}
  .brand__meta{font-size:9px}
  .header__cta{font-size:10px;padding:8px 10px}
  .footer__grid{grid-template-columns:1fr;gap:32px;padding:36px var(--pad) 28px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .footer__tagline{max-width:none}
  .grid--12{grid-template-columns:1fr}
  .panel{padding:18px}
}

@media (max-width:479px){
  .nav-toggle__label{display:none}
  .header__main{padding:10px var(--pad)}
  .header__cta{padding:8px 9px;letter-spacing:.04em}
  .header__rail{justify-content:space-between;gap:8px}
}