/* ============================================================
   大江体育主站 · 共享样式 /assets/site.css
   深场底 + 印刷边框 + 电光青 / 荧光橙 / 暗金 三段强调
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#050B18;
  --ink-deep:#03070F;
  --panel:#0C1730;
  --line:#1B2A4A;
  --text:#E8EEFB;
  --muted:#93A6C4;
  --cyan:#20E3D2;
  --orange:#FF6A18;
  --gold:#C9A227;
  --violet:#6E5BA6;
  --teal:#0E3A46;

  --font-narrow:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --wrap-max:1280px;
  --pad:clamp(16px,4vw,40px);
  --gap:clamp(16px,2.2vw,28px);
  --ease:cubic-bezier(.22,.7,.3,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit}
img,svg,video{max-width:100%;height:auto;display:block}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* ---------- 3. 中文排版基础 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--ink);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.display,.h-xl,.h-lg,.h-md,.h-sm,.brand__name,.footer-brand__name{
  font-family:var(--font-narrow);
  font-weight:900;
  line-height:1.02;
  letter-spacing:-.01em;
  color:var(--text);
}
.display{font-size:clamp(48px,11vw,120px);line-height:.94;letter-spacing:-.02em}
.h-xl{font-size:clamp(40px,6vw,80px)}
.h-lg{font-size:clamp(30px,4.4vw,56px)}
.h-md{font-size:clamp(22px,2.6vw,36px);line-height:1.15}
.h-sm{font-size:clamp(18px,1.8vw,24px);line-height:1.35}
.lead{font-size:clamp(16px,1.5vw,18px);line-height:1.75;color:var(--muted);max-width:40em}
.prose{max-width:46em}
.prose p{font-size:16px;line-height:1.75;color:var(--text);margin-bottom:1em}
.prose p:last-child{margin-bottom:0}
.meta{font-size:12px;line-height:1.6;letter-spacing:.06em;color:var(--muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);font-weight:700;
}
.rule{height:1px;border:0;background:var(--line)}

/* ---------- 4. 色点与标签 ---------- */
.dot{display:inline-block;width:6px;height:6px;flex:none;background:var(--muted)}
.dot--cyan{background:var(--cyan)}
.dot--gold{background:var(--gold)}
.dot--violet{background:var(--violet)}
.dot--orange{background:var(--orange)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.06em;line-height:1;
  padding:5px 10px;border:1px solid var(--line);
  background:var(--panel);color:var(--muted);
}
.tag--cyan{color:var(--cyan);border-color:rgba(32,227,210,.45)}
.tag--gold{color:var(--gold);border-color:rgba(201,162,39,.5)}
.tag--orange{color:var(--orange);border-color:rgba(255,106,24,.5)}

/* ---------- 5. 布局：容器 / 栅格 / 章节 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.grid{display:grid;gap:var(--gap)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.section{
  padding-block:clamp(44px,6.5vw,96px);
  border-bottom:1px solid var(--line);
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border:1px solid transparent;
  font-family:var(--font-body);font-size:14px;font-weight:700;
  letter-spacing:.04em;line-height:1.2;text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--cta{color:var(--orange);border-color:var(--orange);background:transparent}
.btn--cta:hover,.btn--cta:focus-visible{background:var(--orange);color:var(--ink-deep)}
.btn--ghost{color:var(--cyan);border-color:rgba(32,227,210,.5);background:transparent}
.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--cyan);color:var(--ink-deep);border-color:var(--cyan)}

/* ---------- 7. 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(20px,2.4vw,28px);
  background:var(--panel);
  border:1px solid var(--line);
}
.card--teal{
  background:linear-gradient(180deg,rgba(14,58,70,.72),rgba(12,23,48,.94));
  border-color:#17455A;
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{
  padding-block:16px;
  border-bottom:1px solid var(--line);
  font-size:12px;letter-spacing:.08em;color:var(--muted);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--muted);text-decoration:none;transition:color .18s var(--ease)}
.breadcrumb a:hover,.breadcrumb a:focus-visible{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--text)}

/* ---------- 9. 媒体容器（供页面阶段放图） ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--teal);
  border:1px solid var(--line);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--skew{
  clip-path:polygon(0 0,100% 0,100% 86%,0 100%);
  border-color:#17455A;
}
.media__cap{
  position:absolute;left:0;bottom:0;
  padding:8px 12px;
  font-size:12px;letter-spacing:.06em;
  color:var(--text);
  background:rgba(5,11,24,.82);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
}

/* ---------- 10. 显现协议 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. 滚动进度条 ---------- */
.scroll-meter{
  position:fixed;top:0;left:0;right:0;
  height:2px;z-index:200;
  pointer-events:none;
  background:transparent;
}
.scroll-meter__fill{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* ---------- 12. 跳转链接 ---------- */
.skip-link{
  position:absolute;left:var(--pad);top:-80px;z-index:300;
  padding:10px 16px;
  font-size:13px;font-weight:700;letter-spacing:.04em;
  color:var(--ink-deep);background:var(--cyan);
  text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:8px}

/* ---------- 13. 头部 ---------- */
.site-header{
  position:relative;
  background:var(--ink);
  border-bottom:1px solid var(--line);
  z-index:80;
}

/* 顶部信息带 */
.utility-bar{
  background:var(--teal);
  border-bottom:1px solid var(--line);
}
.utility-bar__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:34px;flex-wrap:wrap;
}
.utility-bar__status{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.08em;color:var(--text);
}
.utility-bar__quick{
  display:inline-flex;align-items:center;gap:18px;
  font-size:12px;letter-spacing:.08em;
}
.utility-bar__quick a{
  color:var(--cyan);text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.utility-bar__quick a:hover,.utility-bar__quick a:focus-visible{border-bottom-color:var(--cyan)}
.pulse-dot{
  display:inline-block;width:7px;height:7px;flex:none;
  background:var(--orange);
  box-shadow:0 0 0 0 rgba(255,106,24,.6);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(255,106,24,.5)}
  50%{opacity:.55;box-shadow:0 0 0 6px rgba(255,106,24,0)}
}

/* 品牌与动作行 */
.header-main{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;padding-block:20px 16px;
}
.brand{
  display:inline-flex;align-items:center;gap:14px;
  text-decoration:none;color:var(--text);
}
.brand__name{font-size:clamp(22px,2.4vw,30px);letter-spacing:.02em}
.brand__rule{display:block;width:1px;height:26px;background:var(--gold);opacity:.9}
.brand__tagline{
  font-size:12px;letter-spacing:.08em;color:var(--muted);
  white-space:nowrap;
}
.header-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
.header-help{
  font-size:13px;color:var(--muted);text-decoration:none;
  border-bottom:1px dashed var(--line);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.header-help:hover,.header-help:focus-visible{color:var(--text);border-bottom-color:var(--cyan)}

/* 移动端开关 */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 14px;
  font-size:12px;letter-spacing:.08em;font-weight:700;
  color:var(--text);background:transparent;
  border:1px solid var(--line);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:var(--cyan)}
.nav-toggle__bars{
  position:relative;display:block;width:16px;height:2px;
  background:var(--cyan);
  transition:background-color .18s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;
  background:var(--cyan);
  transition:transform .18s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 主导航：导航条即页面顶边框 */
.site-nav{
  background:var(--ink);
  border-top:1px solid var(--line);
}
.site-nav__list{
  display:flex;flex-wrap:wrap;align-items:stretch;
}
.site-nav__list li{display:flex}
.site-nav__list a{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 20px;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  color:var(--muted);text-decoration:none;
  border-bottom:2px solid transparent;
  border-right:1px solid var(--line);
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.site-nav__list a:hover{
  color:var(--text);
  background:var(--panel);
  border-bottom-color:var(--line);
}
.site-nav__list a[aria-current="page"]{
  color:var(--text);
  background:linear-gradient(180deg,rgba(32,227,210,0),rgba(32,227,210,.10));
  border-bottom-color:var(--cyan);
}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  background:var(--ink-deep);
  border-top:1px solid var(--line);
  color:var(--muted);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3vw,48px);
  padding-block:clamp(40px,6vw,72px) clamp(32px,4vw,48px);
}
.footer-brand__name{
  font-size:24px;color:var(--text);letter-spacing:.02em;
}
.footer-brand__rule{
  display:block;height:1px;margin:14px 0;
  background:linear-gradient(90deg,var(--gold),rgba(201,162,39,0));
}
.footer-brand__note{
  font-size:14px;line-height:1.75;color:var(--muted);max-width:32em;
}
.footer-brand__service{
  margin-top:16px;
  font-size:13px;line-height:1.9;color:var(--text);
}
.footer-brand__service{
  border-left:1px solid var(--line);
  padding-left:14px;
}
.footer-brand__address{
  margin-top:14px;
  font-size:13px;line-height:1.7;color:var(--muted);
}
.footer-col__title{
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;
  font-size:12px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--text);
}
.footer-col__list li{margin-bottom:2px}
.footer-col__list a{
  display:inline-block;
  padding-block:6px;
  font-size:14px;color:var(--muted);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-col__list a:hover,.footer-col__list a:focus-visible{
  color:var(--cyan);border-bottom-color:var(--cyan);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;
  padding-block:20px 28px;
  border-top:1px solid var(--line);
}
.footer-bottom__legal{
  font-size:12px;line-height:1.7;letter-spacing:.04em;color:var(--muted);
  max-width:60em;
}
.footer-bottom__links{
  display:flex;flex-wrap:wrap;gap:18px;
  font-size:12px;letter-spacing:.06em;
}
.footer-bottom__links a{
  color:var(--muted);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-bottom__links a:hover,.footer-bottom__links a:focus-visible{
  color:var(--cyan);border-bottom-color:var(--cyan);
}

/* ---------- 15. 响应式：平板 ---------- */
@media (max-width:1080px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 16. 响应式：移动与折叠导航 ---------- */
@media (max-width:860px){
  .utility-bar__inner{min-height:32px}
  .utility-bar__status{font-size:11px}
  .header-main{
    align-items:center;
    padding-block:16px 14px;
    gap:12px;
  }
  .brand{flex-wrap:wrap;gap:10px}
  .brand__tagline{display:none}
  .header-actions{gap:12px}
  .header-help{display:none}
  .btn--cta{padding:9px 14px;font-size:13px}
  .nav-toggle{display:inline-flex}

  .site-nav{display:none}
  .site-nav[data-open]{
    display:block;
    background:var(--panel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--cyan);
  }
  .site-nav__list{flex-direction:column;padding-block:8px}
  .site-nav__list li{width:100%}
  .site-nav__list a{
    width:100%;
    padding:14px 20px;
    border-right:0;
    border-bottom:1px solid var(--line);
    border-left:2px solid transparent;
  }
  .site-nav__list a[aria-current="page"]{
    border-bottom-color:var(--line);
    border-left-color:var(--cyan);
    background:rgba(32,227,210,.08);
  }

  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:560px){
  .footer-top{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .brand__rule{height:22px}
}

/* ---------- 17. 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js [data-reveal]{opacity:1;transform:none;transition:none}
  .pulse-dot{animation:none}
  .nav-toggle__bars,
  .nav-toggle__bars::before,
  .nav-toggle__bars::after,
  .skip-link,
  .btn,
  .site-nav__list a,
  .footer-col__list a,
  .footer-bottom__links a{transition:none}
}