/* ==========================================================================
   333体育 — 共享样式表 /assets/site.css
   夜场底黑 · 炭黑面板 · 深绿分区 · 荧光绿数据高亮 · 亮橙对比
   ========================================================================== */

:root{
  --ink-black:#071410;
  --panel:#16181A;
  --deep-green:#0E3B2A;
  --pitch-green:#14512F;
  --neon:#B6FF3C;
  --orange:#FF7A1A;
  --paper:#F2F6EF;
  --archive:#D9DFD4;
  --note:#8A9490;
  --note-on-paper:#4C5A54;
  --line:#2C3A34;
  --line-on-paper:rgba(7,20,16,.22);
  --header-h:72px;
  --shell:1180px;
  --shell-wide:1440px;
  --gutter:clamp(16px,4.2vw,52px);
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","IBM Plex Mono",Menlo,Consolas,"Courier New",monospace;
  --shadow-brut:8px 8px 0 rgba(14,59,42,.6);
  --shadow-brut-paper:10px 10px 0 rgba(7,20,16,.85);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}
body{
  margin:0;
  background:var(--ink-black);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.008em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,picture,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
::selection{background:var(--neon);color:var(--ink-black)}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:1px}

/* ---------- 中文排版层级 ---------- */
h1,h2,h3,h4{font-weight:900;letter-spacing:-.02em;line-height:1.14}
h1{font-size:clamp(38px,6.4vw,88px)}
h2{font-size:clamp(26px,3.8vw,50px)}
h3{font-size:clamp(20px,2.4vw,30px)}
h4{font-size:clamp(17px,1.6vw,20px)}
strong,b{font-weight:700;color:var(--neon)}
.paper-block strong,.panel--paper strong,.section--paper strong{color:var(--deep-green)}

/* ---------- 工具类 ---------- */
.u-visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.u-skip{
  position:fixed;left:12px;top:-72px;z-index:200;
  padding:10px 18px;background:var(--neon);color:var(--ink-black);
  font-weight:700;font-size:15px;transition:top .2s ease;
}
.u-skip:focus{top:12px}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

/* ---------- 容器与区块 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.shell--wide{max-width:var(--shell-wide)}

.section{padding:clamp(48px,7vw,104px) 0}
.section--paper{background:var(--paper);color:var(--ink-black)}

.page-intro{
  position:relative;
  padding-top:calc(var(--header-h) + clamp(40px,7vw,100px));
  padding-bottom:clamp(40px,6vw,88px);
  background:
    linear-gradient(180deg,rgba(14,59,42,.55),rgba(7,20,16,0) 72%),
    var(--ink-black);
  overflow:hidden;
}
.page-intro::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--line);
}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--neon);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--neon);flex:0 0 auto}

.rule{height:2px;width:100%;background:var(--line);border:0}
.rule--neon{background:var(--neon)}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(20px,3vw,36px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
.grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--four{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:2px solid var(--line);background:var(--panel);
  color:var(--paper);font-size:15px;font-weight:700;line-height:1.2;
  letter-spacing:.02em;white-space:nowrap;
  box-shadow:5px 5px 0 rgba(7,20,16,.9);
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(182,255,60,.3);border-color:var(--neon);color:var(--neon)}
.btn--accent{background:var(--neon);border-color:var(--neon);color:var(--ink-black)}
.btn--accent:hover{background:var(--orange);border-color:var(--orange);color:var(--ink-black);box-shadow:7px 7px 0 var(--deep-green)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--paper);box-shadow:none}
.btn--ghost:hover{border-color:var(--neon);color:var(--neon);transform:none}

/* ---------- 标签 ---------- */
.tag{
  display:inline-block;padding:4px 12px 3px;
  background:var(--deep-green);color:var(--neon);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  clip-path:polygon(0 0,100% 0,100% 68%,calc(100% - 9px) 100%,0 100%);
}
.tag--alt{background:var(--orange);color:var(--ink-black)}

/* ---------- 面板 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:2px solid var(--line);
  padding:clamp(20px,3vw,34px);
  box-shadow:var(--shadow-brut);
}
.panel--dark{background:var(--deep-green);border-color:var(--neon)}
.panel--paper{
  background:var(--archive);color:var(--ink-black);
  border-color:var(--ink-black);box-shadow:var(--shadow-brut-paper);
}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px;
  padding-bottom:14px;margin-bottom:18px;border-bottom:2px solid var(--line);
}
.panel--paper .panel__head{border-bottom-color:var(--line-on-paper)}
.panel--dark .panel__head{border-bottom-color:var(--neon)}
.panel__title{font-size:clamp(18px,2vw,22px);font-weight:900;letter-spacing:-.01em}

/* ---------- 统计数字 ---------- */
.stat{display:flex;flex-direction:column;gap:6px;min-width:0}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(30px,4.6vw,52px);font-weight:700;line-height:1;
  color:var(--neon);letter-spacing:-.02em;
}
.stat__value--alt{color:var(--orange)}
.stat__label{font-size:14px;line-height:1.5;color:var(--note)}
.panel--paper .stat__label{color:var(--note-on-paper)}

/* ---------- 正文与旁注 ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.75}
.prose p + p{margin-top:1em}
.prose h2{margin-top:1.8em;margin-bottom:.5em}
.prose h3{margin-top:1.5em;margin-bottom:.4em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc}
.prose li + li{margin-top:.35em}

.paper-block{
  background:var(--paper);color:var(--ink-black);
  border:2px solid var(--ink-black);
  padding:clamp(24px,4vw,64px);
  box-shadow:var(--shadow-brut-paper);
}
.paper-block .eyebrow{color:var(--deep-green)}
.paper-block .eyebrow::before{background:var(--deep-green)}

.side-note{
  border-left:2px solid var(--neon);
  padding-left:14px;
  font-size:16px;line-height:1.6;color:var(--note);
}
.side-note__label{
  display:block;margin-bottom:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--neon);
}

/* ---------- 图片容器（页面阶段放占位或实图） ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:2px solid var(--line);
  background:var(--panel);
}
.media--wide{grid-column:span 2}
.media__frame{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background-image:
    repeating-linear-gradient(135deg,rgba(182,255,60,.07) 0 12px,rgba(182,255,60,0) 12px 24px),
    linear-gradient(160deg,var(--deep-green) 0%,var(--panel) 62%,var(--ink-black) 100%);
}
.media--wide .media__frame{aspect-ratio:21/9}
.media--portrait .media__frame{aspect-ratio:3/4}
.media__img{
  width:100%;height:100%;object-fit:cover;display:block;
  filter:saturate(1.05) contrast(1.04);
}
.media__cap{
  display:block;
  padding:10px 14px;
  border-top:2px solid var(--line);
  background:var(--panel);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;line-height:1.5;
  color:var(--note);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:14px 0;border-bottom:2px solid var(--line)}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--note);
}
.breadcrumb__item{display:inline-flex;align-items:center}
.breadcrumb__item:not(:last-child)::after{content:"/";margin-left:10px;color:var(--line)}
.breadcrumb__link{color:var(--note);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.breadcrumb__link:hover{color:var(--neon);border-bottom-color:var(--neon)}
.breadcrumb__current{color:var(--paper)}

/* ---------- 滚动显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s ease,transform .5s ease;
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 返回顶部 ---------- */
.jump-top{
  position:fixed;
  right:clamp(14px,3vw,34px);
  bottom:clamp(14px,3vw,34px);
  z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;
  border:2px solid var(--neon);
  background:var(--panel);
  color:var(--neon);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  box-shadow:5px 5px 0 rgba(7,20,16,.9);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.jump-top.is-visible{opacity:1;visibility:visible;transform:none}

/* ==========================================================================
   头部
   ========================================================================== */
.masthead{
  position:fixed;top:0;left:0;right:0;z-index:120;
  height:var(--header-h);
  display:flex;align-items:center;
  background:transparent;
  border-bottom:2px solid transparent;
  transition:background-color .3s ease,border-color .3s ease;
}
.masthead[data-scrolled="true"]{
  background:var(--panel);
  border-bottom-color:var(--neon);
}
.scroll-progress{
  position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:var(--orange);z-index:2;
  transition:width .12s linear;
}
.masthead__inner{
  width:100%;
  max-width:var(--shell-wide);
  margin:0 auto;
  padding:0 var(--gutter);
  display:flex;align-items:center;
  gap:clamp(16px,2.4vw,40px);
}

.brand-mark{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark__glyph{
  display:inline-grid;place-items:center;
  width:46px;height:34px;
  background:var(--neon);color:var(--ink-black);
  font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% 66%,calc(100% - 10px) 100%,0 100%);
}
.brand-mark__text{display:flex;flex-direction:column;line-height:1.15}
.brand-mark__name{font-size:19px;font-weight:900;letter-spacing:.05em}
.brand-mark__sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--note);
}
.brand-mark--footer .brand-mark__glyph{width:54px;height:40px;font-size:16px}
.brand-mark--footer .brand-mark__name{font-size:24px}

.nav-toggle{
  display:none;margin-left:auto;
  align-items:center;gap:10px;
  padding:8px 12px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--paper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
}
.nav-toggle__box{display:block;width:20px}
.nav-toggle__bar{display:block;height:2px;margin:3px 0;background:var(--neon);transition:transform .2s ease,opacity .2s ease}

.primary-nav{
  flex:1;
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(12px,2vw,32px);
  min-width:0;
}
.primary-nav__list{display:flex;align-items:center;gap:clamp(10px,1.7vw,26px)}
.primary-nav__item{display:block}
.primary-nav__link{
  position:relative;display:inline-block;
  padding:6px 2px;
  font-size:15px;font-weight:500;
  color:var(--paper);white-space:nowrap;
}
.primary-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--neon);
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--neon);font-weight:700}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.primary-nav__aside{display:flex;align-items:center;gap:14px}

.round-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 11px;
  border:1px solid var(--line);
  background:rgba(22,24,26,.72);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--note);white-space:nowrap;
}
.round-chip__dot{
  width:7px;height:7px;border-radius:50%;background:var(--neon);
  box-shadow:0 0 0 3px rgba(182,255,60,.18);
}
.utility-link{
  padding-bottom:2px;
  border-bottom:2px solid var(--neon);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--paper);white-space:nowrap;
  transition:color .18s ease;
}
.utility-link:hover{color:var(--neon)}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  margin-top:clamp(48px,8vw,120px);
  padding:clamp(44px,6vw,88px) 0 28px;
  background:var(--ink-black);
  border-top:2px solid var(--line);
}
.site-footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr)) minmax(0,1.15fr);
  gap:clamp(24px,3.4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand__line{
  font-size:clamp(18px,1.8vw,22px);font-weight:900;line-height:1.3;letter-spacing:-.01em;
}
.footer-brand__note{
  max-width:38ch;
  font-size:14px;line-height:1.7;color:var(--note);
}
.footer-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.footer-col__title{
  position:relative;
  padding-left:14px;
  font-family:var(--font-mono);
  font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--paper);
}
.footer-col__title::before{
  content:"";position:absolute;left:0;top:.45em;width:6px;height:6px;background:var(--neon);
}
.footer-col__list{display:flex;flex-direction:column;gap:9px}
.footer-col__item{display:block}
.footer-link{
  font-size:15px;color:var(--archive);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover{color:var(--neon);border-bottom-color:var(--neon)}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact__item{display:flex;flex-direction:column;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--note);
}
.footer-contact__value{
  font-size:15px;line-height:1.6;color:var(--archive);
  word-break:break-word;
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  margin-top:clamp(32px,4vw,56px);
  padding-top:20px;
  border-top:2px solid var(--line);
}
.footer-legal__copy,
.footer-legal__icp{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;line-height:1.6;
  color:var(--note);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1080px){
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-brand__note{max-width:60ch}
}
@media (max-width:980px){
  :root{--header-h:64px}
  .nav-toggle{display:inline-flex}
  .masthead__inner{gap:12px}
  .brand-mark__sub{display:none}
  .primary-nav{
    position:fixed;
    top:var(--header-h);left:0;right:0;
    height:calc(100vh - var(--header-h));
    height:calc(100dvh - var(--header-h));
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:24px var(--gutter) 48px;
    background:var(--panel);
    border-top:2px solid var(--line);
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .primary-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  html[data-nav-open="true"]{overflow:hidden}
  html[data-nav-open="true"] .masthead{background:var(--panel);border-bottom-color:var(--neon)}
  .primary-nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    border-top:2px solid var(--line);
  }
  .primary-nav__item{border-bottom:2px solid var(--line)}
  .primary-nav__link{display:block;padding:16px 2px;font-size:22px;font-weight:900}
  .primary-nav__link::after{display:none}
  .primary-nav__aside{
    flex-direction:column;align-items:flex-start;gap:14px;
    margin-top:26px;
  }
  .primary-nav__aside .btn{width:100%}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
}
@media (max-width:900px){
  .grid--split,
  .grid--three{grid-template-columns:minmax(0,1fr)}
  .media--wide{grid-column:auto}
}
@media (max-width:600px){
  body{font-size:16px}
  .site-footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .jump-top{right:12px;bottom:12px;padding:9px 12px}
}

/* ==========================================================================
   减弱动效
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .reveal{opacity:1!important;transform:none!important}
  .btn:hover{transform:none}
  .jump-top{transform:none}
}