/* =========================================================
   亿兆体育 · 共享站点样式  /assets/site.css
   夜间球场控制室 · 印刷标签 · 荧光青 / 琥珀黄数据层
   ========================================================= */

/* ---------- 0. 设计变量 ---------- */
:root{
  --ink-900:#07130F;
  --ink-800:#0C1F18;
  --ink-750:#0A1D17;
  --ink-700:#102E24;
  --line:#1F3B31;
  --line-soft:rgba(31,59,49,.65);
  --cyan:#5CF2D6;
  --cyan-dim:rgba(92,242,214,.14);
  --amber:#FFB84A;
  --amber-dim:rgba(255,184,74,.12);
  --cream:#F3EBDD;
  --mist:#A8C0B7;
  --pale:#C9DAD3;
  --orange:#FF6B3D;
  --tag:#0E4A3D;

  --font-body:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-display:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"PingFang SC",sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --pad:clamp(18px,4vw,40px);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --ease:240ms cubic-bezier(.2,.7,.3,1);
}

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--pale);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 8% -8%,rgba(92,242,214,.10),transparent 62%),
    radial-gradient(900px 520px at 92% 2%,rgba(255,184,74,.08),transparent 58%),
    linear-gradient(180deg,#07130F 0%,#081A15 55%,#06110E 100%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,var(--line-soft) 1px,transparent 1px),
    linear-gradient(to bottom,var(--line-soft) 1px,transparent 1px);
  background-size:80px 80px;
  opacity:.22;
  -webkit-mask-image:radial-gradient(120% 80% at 50% 0%,#000 0%,transparent 72%);
  mask-image:radial-gradient(120% 80% at 50% 0%,#000 0%,transparent 72%);
}
main{position:relative;z-index:1;display:block}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.12;
  letter-spacing:-.03em;
  color:var(--cream);
}
p{max-width:68ch}
::selection{background:var(--cyan);color:#04120e}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:6px;
}
[data-nav] a:focus-visible{outline-offset:2px}

/* ---------- 3. 布局基础 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.section{
  position:relative;
  z-index:1;
  padding-block:clamp(40px,6vw,88px);
}
.section--tight{padding-block:clamp(26px,4vw,52px)}

.grid-12{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(16px,2vw,28px)}
.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:1 / -1}
@media (min-width:860px){
  .grid-12{grid-template-columns:repeat(12,minmax(0,1fr))}
  .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-12{grid-column:1 / -1}
}

/* ---------- 4. 工具类 ---------- */
.u-lead{
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.8;
  color:var(--pale);
  max-width:68ch;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:800;
  letter-spacing:-.01em;
}
.is-cyan{color:var(--cyan)}
.is-amber{color:var(--amber)}
.meta-label{
  display:block;
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:14px;
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease);
}
.btn--primary{
  background:var(--cyan);
  color:#04120e;
  box-shadow:0 14px 30px -20px rgba(92,242,214,.9);
}
.btn--primary:hover{background:#7cf7e1;transform:translateY(-2px)}
.btn--ghost{
  border-color:rgba(92,242,214,.45);
  color:var(--cyan);
  background:rgba(92,242,214,.06);
}
.btn--ghost:hover{background:rgba(92,242,214,.16);transform:translateY(-2px)}
.btn--amber{
  background:var(--amber);
  color:#1a1206;
  box-shadow:0 14px 30px -20px rgba(255,184,74,.9);
}
.btn--amber:hover{background:#ffc76e;transform:translateY(-2px)}

/* ---------- 6. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:999px;
  border:1px solid rgba(92,242,214,.28);
  background:var(--tag);
  color:var(--cyan);
  font-size:11px;
  font-weight:800;
  letter-spacing:.12em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag--amber{
  border-color:rgba(255,184,74,.42);
  background:var(--amber-dim);
  color:var(--amber);
}
.tag--muted{
  border-color:var(--line);
  background:transparent;
  color:var(--mist);
}
.tag-scroll{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding-bottom:10px;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
  scrollbar-color:rgba(92,242,214,.35) transparent;
}
.tag-scroll > *{flex:0 0 auto;scroll-snap-align:start}
.tag-scroll::-webkit-scrollbar{height:4px}
.tag-scroll::-webkit-scrollbar-track{background:transparent}
.tag-scroll::-webkit-scrollbar-thumb{background:rgba(92,242,214,.32);border-radius:4px}

/* ---------- 7. 面板 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:linear-gradient(180deg,rgba(14,36,28,.92),rgba(10,26,20,.92));
  box-shadow:inset 0 1px 0 rgba(92,242,214,.08);
}
.panel::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  border-radius:var(--radius-md) var(--radius-md) 0 0;
  background:linear-gradient(90deg,var(--cyan),rgba(92,242,214,0) 55%);
  opacity:.55;
}
.panel__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
  padding-bottom:12px;
  margin-bottom:16px;
  border-bottom:1px dashed var(--line);
}
.panel__head h2,
.panel__head h3{font-size:clamp(18px,2vw,22px)}

/* ---------- 8. 编号章节 ---------- */
.chapter{
  display:flex;
  align-items:baseline;
  gap:clamp(10px,2vw,20px);
  margin-bottom:clamp(14px,2vw,22px);
}
.chapter__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:800;
  font-size:clamp(34px,5vw,64px);
  line-height:1;
  color:rgba(255,184,74,.24);
  -webkit-text-stroke:1px rgba(255,184,74,.55);
  letter-spacing:-.02em;
}
.chapter__title{
  font-size:clamp(20px,2.4vw,30px);
  font-weight:900;
  letter-spacing:-.03em;
  color:var(--cream);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(16px,2.4vw,26px)}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"›";color:rgba(92,242,214,.55);font-size:13px}
.breadcrumb a{
  color:var(--pale);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:rgba(92,242,214,.6)}
.breadcrumb [aria-current="page"]{color:var(--amber)}

/* ---------- 10. 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:
    repeating-linear-gradient(135deg,rgba(92,242,214,.05) 0 2px,transparent 2px 10px),
    var(--ink-750);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(7,19,15,0) 45%,rgba(7,19,15,.72));
}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-caption{
  margin-top:8px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 11. 显现动效 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity var(--ease),transform var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 12. 章节目录跟随 ---------- */
[data-section-nav] a{
  color:var(--mist);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
[data-section-nav] a:hover{color:var(--cyan)}
[data-section-nav] a[aria-current="true"]{
  color:var(--amber);
  border-left-color:var(--amber);
}

/* ---------- 13. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 20px;
  border-radius:8px;
  background:var(--cyan);
  color:#04120e;
  font-size:13px;
  font-weight:800;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 14. 头部：悬浮胶囊浮岛 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:clamp(10px,1.4vw,16px) clamp(14px,3vw,28px);
  pointer-events:none;
}
.header-shell{
  position:relative;
  pointer-events:auto;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,24px);
  padding:9px 10px 9px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(12,31,24,.78);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:
    0 22px 44px -30px #000,
    inset 0 1px 0 rgba(92,242,214,.14);
  transition:background-color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled .header-shell{
  background:rgba(7,19,15,.94);
  border-color:rgba(92,242,214,.32);
  box-shadow:
    0 26px 50px -30px #000,
    inset 0 1px 0 rgba(92,242,214,.2);
}

/* 品牌方章 */
.brand{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}
.brand-mark{
  position:relative;
  flex:none;
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  border-radius:12px;
  border:1px solid rgba(92,242,214,.45);
  background:linear-gradient(150deg,var(--tag),#08251C);
  color:var(--cyan);
  font-family:var(--font-display);
  font-size:18px;
  font-weight:900;
  letter-spacing:-.06em;
  line-height:1;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:4px;
  border-radius:8px;
  border:1px dashed rgba(92,242,214,.22);
  pointer-events:none;
}
.brand-text{display:block;min-width:0}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:17px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--cream);
}
.brand-sub{
  display:block;
  font-size:10px;
  font-weight:700;
  line-height:1.4;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.4vw,18px);
  margin-left:auto;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-link{
  display:inline-block;
  padding:8px 11px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:14px;
  font-weight:600;
  color:var(--pale);
  text-decoration:none;
  white-space:nowrap;
  transition:color var(--ease),background-color var(--ease),border-color var(--ease);
}
.nav-link:hover{color:var(--cyan);background:rgba(92,242,214,.09)}
.nav-link[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#04120e;
  font-weight:800;
}
.nav-link--hot{
  border-color:rgba(92,242,214,.55);
  color:var(--cyan);
  box-shadow:0 0 0 3px rgba(92,242,214,.07),inset 0 0 14px rgba(92,242,214,.1);
}
.nav-link--hot:hover{background:rgba(92,242,214,.16)}
.nav-link--hot[aria-current="page"]{
  background:var(--cyan);
  color:#04120e;
  box-shadow:0 0 0 3px rgba(92,242,214,.18);
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:9px 17px;
  border-radius:999px;
  background:var(--amber);
  color:#1a1206;
  font-size:13px;
  font-weight:900;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 12px 26px -16px rgba(255,184,74,.95);
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.nav-cta:hover{background:#ffc76e;transform:translateY(-1px);box-shadow:0 16px 30px -16px rgba(255,184,74,.95)}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:8px 14px;
  border:1px solid rgba(92,242,214,.35);
  border-radius:999px;
  color:var(--cream);
  font-size:11px;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color var(--ease),background-color var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(92,242,214,.08)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:1200px){
  .nav-link{font-size:13px;padding:7px 9px}
  .nav-cta{font-size:12px;padding:8px 13px}
}

/* 移动端：下拉控制台面板 */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 10px);
    margin:0;
    padding:14px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    border:1px solid var(--line);
    border-radius:22px;
    background:rgba(8,22,18,.985);
    box-shadow:0 34px 64px -34px #000,inset 0 1px 0 rgba(92,242,214,.12);
  }
  .site-nav[data-open]{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px}
  .nav-link{padding:12px 14px;border-radius:14px;font-size:15px}
  .nav-link--hot{order:-1}
  .nav-cta{justify-content:center;padding:12px 16px;font-size:14px;border-radius:14px}
}
@media (max-width:520px){
  .brand-sub{display:none}
  .nav-toggle-label{display:none}
}

/* ---------- 15. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,7vw,104px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#0A1D17 0%,#06110E 100%);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(92,242,214,.55),rgba(255,184,74,.4),transparent);
}
.footer-shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(34px,5vw,64px) var(--pad) 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(26px,4vw,56px);
  padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid var(--line);
}
@media (min-width:760px){
  .footer-grid{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}
}
@media (min-width:1040px){
  .footer-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1.05fr)}
}
.footer-brand{max-width:42ch}
.footer-logo{
  font-family:var(--font-display);
  font-size:clamp(26px,3vw,34px);
  font-weight:900;
  line-height:1;
  letter-spacing:-.04em;
  color:var(--cream);
}
.footer-logo::after{
  content:"";
  display:block;
  width:46px;
  height:3px;
  margin-top:14px;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  border-radius:3px;
}
.footer-tagline{
  margin-top:16px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
  max-width:none;
}
.footer-note{
  margin-top:12px;
  font-size:14px;
  line-height:1.75;
  color:var(--mist);
}
.footer-cta{margin-top:20px}
.footer-heading{
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:16px;
  font-family:var(--font-body);
  font-size:11px;
  font-weight:800;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-heading::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--cyan);
  transform:rotate(45deg);
}
.footer-list{display:grid;gap:2px}
.footer-link{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:var(--pale);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-link:hover{color:var(--cyan);border-bottom-color:rgba(92,242,214,.55)}
.contact-list{display:grid;gap:14px}
.contact-item{display:grid;gap:3px}
.contact-value{
  font-size:14px;
  line-height:1.6;
  color:var(--pale);
  overflow-wrap:anywhere;
}
.contact-value--num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  letter-spacing:.05em;
  color:var(--cream);
}
.contact-note{
  margin-top:16px;
  max-width:34ch;
  font-size:12px;
  line-height:1.75;
  color:var(--mist);
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 26px;
  padding-block:20px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-base p{max-width:none}
.footer-copy{color:var(--pale)}
.footer-legal{
  font-family:var(--font-mono);
  letter-spacing:.08em;
  color:var(--mist);
}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:14px}
.footer-legal-links a{
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
  font-size:12px;
  transition:color var(--ease),border-color var(--ease);
}
.footer-legal-links a:hover{color:var(--cyan);border-bottom-color:rgba(92,242,214,.55)}

/* ---------- 16. 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:clamp(14px,2.4vw,28px);
  bottom:clamp(14px,2.4vw,28px);
  z-index:70;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid rgba(92,242,214,.42);
  border-radius:999px;
  background:rgba(12,31,24,.94);
  color:var(--cyan);
  font-size:11px;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
  cursor:pointer;
  box-shadow:0 18px 34px -22px #000;
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity var(--ease),transform var(--ease),border-color var(--ease);
}
.to-top.is-on{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--amber);color:var(--amber)}

/* ---------- 17. 响应式补丁 ---------- */
@media (min-width:1081px){
  .site-nav{flex-wrap:nowrap}
}
@media (max-width:860px){
  body{font-size:15.5px}
  .chapter__num{font-size:clamp(30px,8vw,44px)}
  .footer-base{flex-direction:column;align-items:flex-start}
}

/* ---------- 18. 降低动效偏好 ---------- */
@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;
  }
  .has-js [data-reveal]{opacity:1 !important;transform:none !important}
  .to-top{transform:none}
  .btn:hover,.nav-cta:hover{transform:none}
}