/* =========================================================
   顺发体育中心 — 共享样式 /assets/site.css
   轨道式导航 · 夜空场蓝 · 信号青绿
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid #2BE8A5; outline-offset: 2px; border-radius: 2px; }

/* ---------- 2. Tokens ---------- */
:root {
  --night: #070C16;
  --panel: #0E1726;
  --track: #16243A;
  --sig: #2BE8A5;
  --sig-deep: #14A87A;
  --amber: #FF8A3D;
  --mist: #E9F0F8;
  --cool: #94A6BD;
  --line: #22334D;
  --blue: #4EA8FF;

  --rail-w: 272px;
  --bar-h: 62px;
  --gutter: clamp(18px, 4vw, 64px);
  --measure: 70ch;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Noto Sans Mono CJK SC", "Courier New", monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 200ms;
}

/* ---------- 3. Base ---------- */
html {
  background: var(--night);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--bar-h) + 20px);
}
body {
  min-height: 100vh;
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1200px 620px at 78% -12%, rgba(43, 232, 165, .10), transparent 62%),
    radial-gradient(900px 520px at 6% 112%, rgba(78, 168, 255, .07), transparent 66%),
    repeating-linear-gradient(90deg, rgba(34, 51, 77, .30) 0 1px, transparent 1px 96px);
}
main { display: block; }
#main-content { scroll-margin-top: calc(var(--bar-h) + 20px); }
::selection { background: rgba(43, 232, 165, .28); color: var(--mist); }

/* ---------- 4. Typography ---------- */
h1, h2, h3, h4 { font-weight: 700; color: var(--mist); }
.display-1 { font-size: clamp(38px, 6vw, 76px); line-height: 1.02; letter-spacing: -.03em; font-weight: 800; }
.display-2 { font-size: clamp(28px, 4vw, 48px); line-height: 1.1; letter-spacing: -.02em; font-weight: 800; }
.display-3 { font-size: clamp(21px, 2.6vw, 32px); line-height: 1.22; letter-spacing: -.02em; font-weight: 700; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: .01em; }
.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--sig);
}
.note-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  letter-spacing: .22em;
  line-height: 1;
  color: var(--cool);
}
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 34px);
}
.section-head h2 { font-size: clamp(22px, 2.8vw, 32px); letter-spacing: -.02em; line-height: 1.2; }
.section-head p { font-size: 14px; color: var(--cool); }

/* ---------- 5. Layout ---------- */
.wrap {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.prose { max-width: var(--measure); font-size: 17px; line-height: 1.85; color: var(--mist); }
.prose > * + * { margin-top: 1.4em; }
.prose h2 { font-size: clamp(20px, 2.4vw, 26px); letter-spacing: -.02em; margin-top: 1.8em; }
.prose h3 { font-size: 18px; margin-top: 1.6em; }
.prose p + p { margin-top: 1.4em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose ul li { list-style: none; position: relative; padding-left: 1em; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: .82em; width: 8px; height: 1px; background: var(--sig); }
.prose ol { list-style: decimal; }
.prose ol li { padding-left: .2em; }
.prose a { color: var(--sig); border-bottom: 1px solid rgba(43, 232, 165, .35); }
.prose a:hover { border-bottom-color: var(--sig); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 1.6vw, 24px);
}
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(14px, 1.8vw, 24px);
}
.stack { display: flex; flex-direction: column; gap: clamp(12px, 1.6vw, 22px); }
.rule { height: 1px; background: var(--line); border: 0; }
.breath { height: clamp(48px, 8vw, 120px); }

/* ---------- 6. Header / Rail ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 60;
  display: block;
  background: linear-gradient(180deg, rgba(14, 23, 38, .98) 0%, rgba(7, 12, 22, .99) 100%);
  border-right: 1px solid var(--line);
}
.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  bottom: 0;
  width: 1px;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 0%, rgba(43, 232, 165, .50) 18%, rgba(43, 232, 165, .14) 62%, transparent 100%);
}
.rail {
  display: flex;
  flex-direction: column;
  gap: 24px;
  height: 100%;
  padding: 26px 20px 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.rail__top { display: flex; flex-direction: column; gap: 18px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--night);
  background: var(--sig);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name { font-size: 17px; font-weight: 700; letter-spacing: -.01em; color: var(--mist); }
.brand__tagline { font-size: 12px; letter-spacing: .14em; color: var(--cool); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--mist);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--sig-deep); background: rgba(43, 232, 165, .08); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; justify-content: center; gap: 4px; width: 18px; }
.nav-toggle__bars i { display: block; height: 1.5px; background: var(--sig); transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.nav-toggle__text { font-family: var(--font-mono); }
.site-header[data-open="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.rail__nav { display: flex; flex-direction: column; gap: 4px; flex: 1 1 auto; min-height: 0; }
.rail__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cool);
  padding-left: 12px;
  margin-bottom: 10px;
}
.nav-list { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.nav-list__item { border-bottom: 1px solid var(--line); }
.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 12px 11px 14px;
  font-size: 15px;
  color: var(--cool);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--sig);
  transform: translateY(-50%);
  transition: height var(--dur) var(--ease);
}
.nav-link:hover { color: var(--mist); background: rgba(43, 232, 165, .07); padding-left: 18px; }
.nav-link:hover::before { height: 58%; }
.nav-link__num { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: #3d5473; }
.nav-link__text { letter-spacing: .01em; }
.nav-link[aria-current="page"] {
  color: #04140E;
  font-weight: 600;
  padding-left: 16px;
  padding-right: 20px;
  background: var(--sig);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 100%, 0 100%);
}
.nav-link[aria-current="page"]::before { height: 0; }
.nav-link[aria-current="page"] .nav-link__num { color: rgba(4, 20, 14, .58); }

.rail__cta {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.rail__hint { font-size: 12px; line-height: 1.7; color: var(--cool); }

.skip-link {
  position: absolute;
  left: 10px;
  top: -70px;
  z-index: 120;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: #04140E;
  background: var(--sig);
  border-radius: 2px;
  transition: top .16s var(--ease);
}
.skip-link:focus { top: 10px; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  background: rgba(34, 51, 77, .55);
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--sig-deep), var(--sig));
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

/* ---------- 7. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 128px);
  background: linear-gradient(180deg, rgba(7, 12, 22, 0) 0%, rgba(5, 9, 18, .96) 42%, #050912 100%);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 128px;
  height: 2px;
  background: var(--sig);
}
.footer__inner {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) 2fr;
  gap: clamp(26px, 4vw, 64px);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(32px, 5vw, 64px) var(--gutter) 30px;
}
.footer__brand { display: flex; flex-direction: column; gap: 14px; }
.footer__brand .brand__name { font-size: 16px; }
.footer__line { font-size: 14px; line-height: 1.75; color: var(--cool); }
.footer__line--addr { color: #6f88a6; }
.footer__cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(18px, 3vw, 40px); }
.footer__col { min-width: 0; }
.footer__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--sig);
  margin-bottom: 14px;
}
.footer__list { display: flex; flex-direction: column; gap: 9px; }
.footer__link {
  font-size: 14px;
  color: var(--cool);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.footer__link:hover { color: var(--mist); padding-left: 5px; }
.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 22px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px var(--gutter) 28px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: #61789A;
}
.footer__icp { color: var(--cool); }

/* ---------- 8. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  min-height: 44px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--sig-deep);
  border-radius: 2px;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn--primary { background: var(--sig); border-color: var(--sig); color: #04140E; }
.btn--primary:hover { background: #4ff5b8; border-color: #4ff5b8; transform: translateY(-1px); }
.btn--ghost { border-color: var(--line); color: var(--cool); }
.btn--ghost:hover { border-color: var(--sig); color: var(--sig); background: rgba(43, 232, 165, .08); }

/* ---------- 9. Tags / Panels / Crumbs ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .08em;
  color: var(--cool);
  white-space: nowrap;
}
.tag--time { color: var(--amber); border-color: rgba(255, 138, 61, .45); background: rgba(255, 138, 61, .08); }
.tag--link { color: var(--blue); border-color: rgba(78, 168, 255, .40); background: rgba(78, 168, 255, .06); }
.tag--live { color: #04140E; background: var(--sig); border-color: var(--sig); }

.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 28px);
}
.panel::before,
.panel::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--sig-deep);
  pointer-events: none;
}
.panel::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.panel::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cool);
}
.crumbs a { color: var(--cool); transition: color var(--dur) var(--ease); }
.crumbs a:hover { color: var(--sig); }
.crumbs__sep { color: #3d5473; }

/* ---------- 10. Media containers ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--track);
  border: 1px solid var(--line);
}
.media > img,
.media > picture,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.82) contrast(1.06) brightness(.9);
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 12, 22, .10) 0%, rgba(7, 12, 22, .48) 100%);
}
.media--tall { aspect-ratio: 3 / 4; }
.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  background: rgba(7, 12, 22, .7);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}
.media--zoom > img { transition: transform .5s var(--ease); }
.media--zoom:hover > img { transform: scale(1.04); }

/* ---------- 11. Collapse group ---------- */
.collapse {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
}
.collapse + .collapse { margin-top: -1px; }
.collapse__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.collapse__trigger:hover { color: var(--sig); background: rgba(43, 232, 165, .05); }
.collapse__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}
.collapse__icon::before,
.collapse__icon::after {
  content: "";
  position: absolute;
  background: var(--sig);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.collapse__icon::before { left: 0; top: 6px; width: 14px; height: 1.5px; }
.collapse__icon::after { left: 6px; top: 0; width: 1.5px; height: 14px; }
.collapse[data-open="true"] .collapse__icon::after { transform: scaleY(0); opacity: 0; }
.collapse[data-open="true"] { border-color: rgba(43, 232, 165, .45); }
.collapse__panel {
  height: 0;
  overflow: hidden;
  opacity: 0;
  transition: height .28s var(--ease), opacity .28s var(--ease);
}
.collapse[data-open="true"] .collapse__panel { opacity: 1; }
.collapse__inner {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool);
}

/* ---------- 12. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: .06s; }
[data-reveal-delay="2"] { transition-delay: .12s; }
[data-reveal-delay="3"] { transition-delay: .18s; }
[data-reveal-delay="4"] { transition-delay: .24s; }

/* ---------- 13. Responsive ---------- */
@media (max-width: 1023px) {
  .site-header {
    position: sticky;
    top: 0;
    left: auto;
    bottom: auto;
    width: auto;
    display: block;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    background: rgba(7, 12, 22, .94);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
  .site-header::after { display: none; }
  .rail {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    height: auto;
    padding: 10px 16px;
    overflow: visible;
  }
  .rail__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 12px;
  }
  .nav-toggle { display: inline-flex; }
  .brand__mark { width: 38px; height: 38px; font-size: 13px; }
  .brand__name { font-size: 15px; }
  .brand__tagline { font-size: 11px; letter-spacing: .10em; }

  .rail__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-height: calc(100vh - 78px);
    max-height: calc(100dvh - 78px);
    overflow-y: auto;
    padding: 16px 16px 22px;
    background: var(--panel);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) linear;
  }
  .site-header[data-open="true"] .rail__nav {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }
  .rail__label { padding-left: 0; }
  .rail__cta { margin-top: 8px; padding-top: 16px; }
  .nav-link { padding: 13px 12px 13px 14px; }

  body { padding-left: 0; }
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-4, .span-6, .span-8, .span-12 { grid-column: span 6; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .footer__inner { grid-template-columns: 1fr; padding-bottom: 22px; }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 26px; }
  .footer__base { flex-direction: column; align-items: flex-start; }
  .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .footer__cols { grid-template-columns: 1fr; }
  .nav-toggle__text { display: none; }
}

/* ---------- 14. Motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .media--zoom:hover > img { transform: none; }
}