/* ============================================================
   NG 体育入口 — 共享样式表 /assets/site.css
   夜间场馆陈列：深底双层导航 × 奶油展签 × 霓虹记分 × 斜切轨道
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: #0B0D0C;
  background-image:
    radial-gradient(1100px 560px at 88% -12%, rgba(47, 182, 255, .10), transparent 62%),
    radial-gradient(880px 520px at 4% 14%, rgba(182, 255, 60, .055), transparent 60%);
  background-repeat: no-repeat;
  color: var(--cream);
  font-family: var(--font-sans);
  font-size: clamp(15px, .95rem + .18vw, 17px);
  line-height: 1.75;
  letter-spacing: .01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }

h1, h2, h3, h4, h5, h6 { margin: 0 0 .6em; line-height: 1.25; font-weight: 800; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }

::selection { background: var(--neon); color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
  border-radius: 2px;
}

#main-content { scroll-margin-top: 120px; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B0D0C;
  --carbon: #14181A;
  --cream: #F2E9DA;
  --orange: #FF6A2B;
  --neon: #B6FF3C;
  --blue: #2FB6FF;
  --clay: #6B4A32;
  --gray: #9AA3A0;
  --amber: #FFB020;
  --red: #E0453A;

  --line: rgba(107, 74, 50, .58);
  --line-soft: rgba(107, 74, 50, .32);
  --ink-soft: rgba(242, 233, 218, .74);
  --veil: rgba(242, 233, 218, .05);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system,
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono",
               Consolas, "Liberation Mono", Menlo, monospace;

  --maxw: 1280px;
  --gutter: clamp(16px, 4vw, 48px);
  --radius: 2px;
  --skew: -7deg;
}

/* ---------- 3. 通用布局 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 88px); }

.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.rule-slash {
  height: 12px;
  border: 0;
  margin: 0;
  background-image: repeating-linear-gradient(
    108deg,
    rgba(107, 74, 50, .9) 0 2px,
    transparent 2px 13px
  );
}

.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;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -68px;
  z-index: 999;
  display: inline-block;
  padding: 10px 18px;
  background: var(--neon);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top .2s ease;
}
.skip-link:focus { top: 12px; text-decoration: none; }

/* ---------- 4. 文字体系 ---------- */
.display {
  display: inline-block;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  transform: skewX(var(--skew));
  transform-origin: left bottom;
  text-wrap: balance;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 .5em;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gray);
}
.eyebrow::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--orange);
  transform: skewX(-30deg);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -.01em;
  color: var(--cream);
}
.num--lead { color: var(--orange); }
.num--live { color: var(--neon); }
.num-unit {
  font-size: .62em;
  letter-spacing: .12em;
  color: var(--gray);
  margin-left: .28em;
  font-family: var(--font-sans);
}

.exhibit-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  background: var(--veil);
  color: var(--cream);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  border-radius: var(--radius);
}
.exhibit-tag::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--neon);
  transform: rotate(45deg);
}
.exhibit-tag--amber::before { background: var(--amber); }
.exhibit-tag--red::before { background: var(--red); }
.exhibit-tag--blue::before { background: var(--blue); }

.plate {
  background: var(--cream);
  color: #1B120C;
  border-radius: var(--radius);
  padding: clamp(20px, 2.8vw, 34px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .38);
}
.plate h2, .plate h3, .plate h4 { color: #120C08; }
.plate p { color: #33241A; }
.plate a { color: #8A3A10; }
.plate .eyebrow { color: #8A4A24; }
.plate .exhibit-tag {
  border-color: rgba(27, 18, 12, .28);
  background: rgba(27, 18, 12, .05);
  color: #1B120C;
}

.prose {
  max-width: 38em;
  color: var(--ink-soft);
}
.prose p { max-width: 36em; }
.prose strong { color: var(--cream); }
.prose h2, .prose h3 { color: var(--cream); margin-top: 1.6em; }
.prose ul { color: var(--ink-soft); }

/* ---------- 5. 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px 13px 30px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background .22s ease, color .22s ease,
              border-color .22s ease, transform .22s ease;
}
.btn::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  width: 9px;
  height: 2px;
  background: currentColor;
  transform: translateY(-50%) skewX(-30deg);
  transition: width .22s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:hover::before { width: 15px; }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--orange); color: #170D05; }
.btn--primary:hover { background: #FF7F4D; }

.btn--ghost { border-color: rgba(242, 233, 218, .28); color: var(--cream); }
.btn--ghost:hover { border-color: var(--neon); color: var(--neon); background: rgba(182, 255, 60, .08); }

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 13, 12, .94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.header-upper {
  max-height: 180px;
  overflow: hidden;
  background: var(--carbon);
  border-bottom: 1px solid var(--line-soft);
  transition: max-height .34s ease, opacity .24s ease;
}
.site-header[data-compact] .header-upper {
  max-height: 0;
  opacity: 0;
}

.header-row {
  display: flex;
  align-items: center;
  gap: 12px 24px;
}
.header-row--upper {
  flex-wrap: wrap;
  padding-block: 10px;
}
.header-row--lower {
  justify-content: space-between;
  flex-wrap: nowrap;
  padding-block: 12px;
}

.brand-line {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--cream);
  white-space: nowrap;
}
.brand-line__glyph {
  display: inline-block;
  padding: 2px 8px 3px;
  background: var(--orange);
  color: var(--ink);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .06em;
  transform: skewX(-9deg);
}

.header-statement {
  flex: 1 1 280px;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--gray);
}

.status-cluster {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 11px;
  border: 1px solid rgba(182, 255, 60, .34);
  border-radius: 999px;
  background: rgba(182, 255, 60, .07);
  color: var(--neon);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  white-space: nowrap;
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--neon);
  animation: ng-pulse 2s ease-in-out infinite;
}
@keyframes ng-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.82); }
}

.utility-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.utility-link {
  padding: 4px 8px;
  color: var(--gray);
  font-size: 12.5px;
  letter-spacing: .04em;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.utility-link:hover {
  color: var(--blue);
  border-bottom-color: var(--blue);
  text-decoration: none;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--cream);
  text-decoration: none;
  flex: 0 1 auto;
  min-width: 0;
}
.brand-lockup:hover { text-decoration: none; }
.brand-lockup__glyph {
  display: inline-block;
  padding: 2px 10px 5px;
  background: var(--neon);
  color: var(--ink);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.03em;
  line-height: 1.1;
  transform: skewX(-9deg);
  flex: 0 0 auto;
}
.brand-lockup__words {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.brand-lockup__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1.2;
  white-space: nowrap;
}
.brand-lockup__sub {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--blue);
  line-height: 1.4;
}
.brand-lockup--footer { margin-bottom: 14px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--carbon);
  color: var(--cream);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  position: relative;
  z-index: 95;
}
.nav-toggle:hover { border-color: var(--neon); color: var(--neon); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 12px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transform: skewX(-24deg);
  transition: width .22s ease;
}
.nav-toggle__bars i:last-child { width: 66%; }

.primary-nav { display: block; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-item { margin: 0; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 13px;
  border-radius: var(--radius);
  color: var(--cream);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
  text-decoration: none;
  transition: color .2s ease, background .2s ease;
}
.nav-link:hover {
  color: var(--neon);
  background: rgba(182, 255, 60, .08);
  text-decoration: none;
}
.nav-link[aria-current="page"] {
  background: var(--cream);
  color: var(--ink);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 5px;
  height: 2px;
  background: var(--orange);
}

.scroll-rail {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--orange));
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 104px);
  padding-block: clamp(36px, 5vw, 68px) 24px;
  background: var(--carbon);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 10px;
  background-image: repeating-linear-gradient(
    108deg,
    rgba(255, 106, 43, .85) 0 3px,
    transparent 3px 16px
  );
  opacity: .7;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 3fr;
  gap: clamp(28px, 3.4vw, 56px);
  align-items: start;
}

.footer-identity { min-width: 0; }

.footer-brandline {
  margin: 0 0 4px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--cream);
}
.footer-cities {
  margin: 0 0 22px;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--neon);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 36px);
}

.footer-col__title {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gray);
}
.footer-col__title::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  margin-top: 8px;
  background: var(--orange);
  transform: skewX(-30deg);
}

.footer-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-list li { margin-bottom: 9px; }

.footer-link {
  color: var(--cream);
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.footer-link:hover {
  color: var(--blue);
  border-bottom-color: var(--blue);
  text-decoration: none;
}
.footer-link--muted { color: var(--gray); font-size: 12.5px; }
.footer-link--muted:hover { color: var(--blue); }

.contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}
.contact-item {
  display: grid;
  grid-template-columns: 3.4em minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}
.contact-key {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gray);
}
.contact-value {
  font-size: 13.5px;
  color: var(--ink-soft);
  word-break: break-all;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  color: var(--gray);
}
.footer-legal p { margin: 0; }
.footer-legal__links { display: inline-flex; align-items: center; gap: 8px; }
.legal-sep { color: var(--clay); }

/* ---------- 8. 通用组件 ---------- */
.breadcrumb {
  font-size: 13px;
  color: var(--gray);
  margin-bottom: clamp(14px, 2vw, 24px);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: "/";
  color: var(--clay);
}
.breadcrumb a { color: var(--blue); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--cream); }

.data-card {
  position: relative;
  background: var(--carbon);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.data-card:hover,
.data-card:focus-within {
  transform: translateY(-2px);
  border-color: rgba(182, 255, 60, .5);
  background: #171C1E;
}
.data-card__meta {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
  opacity: 0;
  transition: opacity .25s ease;
}
.data-card:hover .data-card__meta,
.data-card:focus-within .data-card__meta { opacity: 1; }

.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #171C1E, #0E1213 70%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.figure > img,
.figure > picture,
.figure > picture > img,
.figure > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure--wide { aspect-ratio: 21 / 9; }
.figure--tall { aspect-ratio: 3 / 4; }
.figure--square { aspect-ratio: 1 / 1; }

.figure__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 92%;
  padding: 8px 14px;
  background: var(--cream);
  color: #1B120C;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .02em;
}

.tabs { margin-block: clamp(18px, 2.6vw, 32px); }

.tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--line);
}

.tab {
  appearance: none;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--gray);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 10px 15px;
  cursor: pointer;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}
.tab:hover { color: var(--cream); background: rgba(242, 233, 218, .06); }
.tab[aria-selected="true"] {
  background: var(--cream);
  color: var(--ink);
  border-bottom-color: var(--orange);
}

.tabpanel { padding-top: clamp(16px, 2vw, 26px); }
.tabpanel[hidden] { display: none; }

/* ---------- 9. 动效 ---------- */
.reveal {
  transition: opacity .6s ease-out, transform .6s ease-out;
}
body.js-ready .reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(14px);
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1120px) {
  .header-row--upper { gap: 10px 16px; }
  .header-statement { flex: 1 1 100%; order: 3; }
  .nav-link { padding: 9px 10px; font-size: 14px; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    width: min(86vw, 340px);
    padding: 96px 20px 40px;
    background: var(--carbon);
    border-left: 1px solid var(--line);
    box-shadow: -28px 0 70px rgba(0, 0, 0, .55);
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform .32s cubic-bezier(.4, 0, .2, 1);
  }
  .primary-nav[data-open] { transform: translateX(0); }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-link {
    display: block;
    padding: 15px 12px;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 0;
    font-size: 17px;
  }
  .nav-link[aria-current="page"] {
    background: transparent;
    color: var(--orange);
  }
  .nav-link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 50%;
    bottom: auto;
    width: 3px;
    height: 20px;
    transform: translateY(-50%);
    border-radius: 2px;
  }

  body.nav-open { overflow: hidden; }

  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .header-statement { display: none; }
  .status-cluster { gap: 10px; }
  .utility-nav { flex-wrap: wrap; justify-content: flex-end; }
  .utility-link { padding: 4px 6px; font-size: 12px; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-legal { flex-direction: column; align-items: flex-start; }

  .grid12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .brand-lockup__sub { letter-spacing: .22em; }
  .brand-lockup__glyph { font-size: 19px; padding: 2px 8px 4px; }
  .footer-cols { grid-template-columns: 1fr; }
  .tab { padding: 9px 11px; font-size: 13px; }
}

/* ---------- 11. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  body.js-ready .reveal:not(.is-visible) {
    opacity: 1;
    transform: none;
  }
  .scroll-rail { transition: none; }
}