/* ============================================================
   加加体育赛场 — 共享样式 /assets/site.css
   ============================================================ */

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

/* ---------- tokens ---------- */
:root {
  --pitch: #0B2E24;
  --night: #0A1428;
  --ink: #050807;
  --panel: #12251E;
  --grass: #1E7A5A;
  --paper: #F7F9F5;
  --data: #8A9A92;
  --line: #C9D3CC;
  --volt: #D7FF3F;
  --ember: #FF5C35;

  --rail-w: 268px;
  --bar-h: 65px;
  --maxw: 1180px;

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

  --edge: 1px solid rgba(201, 211, 204, 0.18);
  --edge-soft: 1px solid rgba(201, 211, 204, 0.12);
  --radius: 12px;
  --radius-sm: 6px;

  --shadow-panel: 0 18px 44px rgba(5, 8, 7, 0.42);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- base ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  background-color: var(--pitch);
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 211, 204, 0.045) 0 1px, transparent 1px 108px),
    radial-gradient(1100px 620px at 82% -12%, rgba(215, 255, 63, 0.10), transparent 62%),
    radial-gradient(900px 520px at 6% 108%, rgba(255, 92, 53, 0.09), transparent 66%),
    linear-gradient(180deg, #0B2E24 0%, #08201A 42%, #0A1428 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-weight: 900; line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.1rem, 5.4vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.6vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.4vw, 1.5rem); }
p  { max-width: 68ch; }
small { font-size: 12px; }
strong { font-weight: 800; }

.num, [data-num] {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}
.muted { color: var(--data); }
.rule { height: 1px; background: rgba(201, 211, 204, 0.2); border: 0; margin: 32px 0; }

/* ---------- layout ---------- */
.container { width: min(100% - 36px, var(--maxw)); margin-inline: auto; }
.section { position: relative; margin-block: clamp(48px, 7vw, 88px); }
.section__index {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--volt);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.section__index::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--volt);
}
.eyebrow {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--data);
  text-transform: uppercase;
}
.heading-display {
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  font-size: clamp(2rem, 5vw, 3.4rem);
}
.lede { font-size: clamp(1rem, 1.4vw, 1.12rem); color: var(--line); }

.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--aside { grid-template-columns: 1fr; }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--volt);
  color: var(--ink);
  font-weight: 800;
  font-size: 14px;
  transform: translateY(-220%);
  transition: transform 0.22s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  display: flex;
  flex-direction: column;
  padding: 0 14px;
  background: rgba(10, 20, 40, 0.96);
  border-bottom: var(--edge);
  backdrop-filter: blur(10px);
}
.rail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--bar-h);
}

.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand__mark {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--volt);
  color: var(--ink);
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
  transform: rotate(-3deg);
  box-shadow: 0 0 0 1px rgba(5, 8, 7, 0.55), 0 8px 22px rgba(215, 255, 63, 0.22);
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--paper);
  white-space: nowrap;
}
.brand__tagline {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--data);
  line-height: 1.4;
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: var(--edge);
  border-radius: var(--radius-sm);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.1em;
  background: rgba(30, 122, 90, 0.22);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 18px; }
.nav-toggle__bars i { display: block; height: 2px; background: var(--volt); border-radius: 2px; transition: transform 0.22s var(--ease), opacity 0.22s var(--ease); }
.nav-toggle__label { font-weight: 700; }
.nav-toggle[aria-expanded="true"] { border-color: var(--volt); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.rail-nav {
  position: fixed;
  left: 0;
  top: var(--bar-h);
  bottom: 0;
  z-index: 90;
  width: min(86vw, 330px);
  padding: 20px 16px 28px;
  overflow-y: auto;
  background: linear-gradient(180deg, #0A1428 0%, #08211B 100%);
  border-right: var(--edge);
  border-top: var(--edge-soft);
  transform: translateX(-104%);
  transition: transform 0.34s var(--ease);
}
.site-header[data-open] .rail-nav { transform: translateX(0); }

.nav-scrim {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--bar-h);
  bottom: 0;
  z-index: 85;
  background: rgba(5, 8, 7, 0.66);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.site-header[data-open] .nav-scrim { opacity: 1; pointer-events: auto; }

.rail-label {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--data);
  margin-bottom: 12px;
}
.rail-nav__list { display: flex; flex-direction: column; gap: 4px; }
.rail-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  color: var(--line);
  font-size: 15px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.rail-link__idx { font-family: var(--font-num); font-size: 11px; color: var(--data); min-width: 20px; }
.rail-link:hover { background: rgba(30, 122, 90, 0.3); color: var(--paper); }
.rail-link[aria-current="page"] {
  background: rgba(215, 255, 63, 0.12);
  border-left-color: var(--volt);
  color: var(--volt);
  font-weight: 800;
}
.rail-link[aria-current="page"] .rail-link__idx { color: var(--volt); }

.rail-meta { margin-top: 26px; padding-top: 20px; border-top: var(--edge-soft); display: grid; gap: 10px; }
.rail-meta__line {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--line);
}
.rail-meta__note { font-size: 12px; color: var(--data); letter-spacing: 0.06em; }
.pulse {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--volt);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(215, 255, 63, 0.55); }
  70% { box-shadow: 0 0 0 11px rgba(215, 255, 63, 0); }
  100% { box-shadow: 0 0 0 0 rgba(215, 255, 63, 0); }
}

html.nav-open, html.nav-open body { overflow: hidden; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(56px, 8vw, 96px);
  background: linear-gradient(180deg, rgba(10, 20, 40, 0.35) 0%, #050807 62%);
  border-top: var(--edge);
  color: var(--line);
}
.tape {
  overflow: hidden;
  background: rgba(11, 46, 36, 0.55);
  border-bottom: var(--edge-soft);
}
.tape__track { display: flex; width: max-content; padding: 10px 0; }
.tape[data-ready] .tape__track { animation: tape-slide 42s linear infinite; }
.tape__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: 34px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--data);
  white-space: nowrap;
}
.tape__item::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--volt);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
@keyframes tape-slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.footer__inner { width: min(100% - 36px, var(--maxw)); margin-inline: auto; padding: 46px 0 30px; }
.footer__grid { display: grid; gap: 30px; grid-template-columns: 1fr; }
.footer__col { min-width: 0; }
.footer__brand .brand { margin-bottom: 14px; }
.footer__pitch { font-size: 14px; color: var(--data); max-width: 34ch; }
.footer__help { margin-top: 18px; }
.footer__help-title {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--volt);
  margin-bottom: 8px;
}
.footer__title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--paper);
  margin-bottom: 14px;
}
.footer__list { display: grid; gap: 9px; }
.footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--line);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.footer__link:hover { color: var(--volt); border-bottom-color: var(--volt); }

.footer__contact {
  margin-top: 40px;
  padding: 24px;
  border: var(--edge);
  border-radius: var(--radius);
  background: rgba(18, 37, 30, 0.72);
}
.contact-grid { display: grid; gap: 14px; }
.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: var(--edge-soft);
}
.contact-line:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-line__label {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--volt);
  min-width: 76px;
}
.contact-line__value { font-size: 14px; color: var(--paper); word-break: break-all; }
.copy-status { font-size: 12px; color: var(--ember); min-height: 1em; }
.footer__note { margin-top: 14px; font-size: 12px; color: var(--data); }

.footer__base {
  margin-top: 30px;
  padding-top: 22px;
  border-top: var(--edge-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
}
.footer__legal, .footer__service, .footer__year {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--data);
}
.footer__legal { color: var(--line); }

/* ============================================================
   BUTTONS / TAGS / PANELS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-align: center;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--volt); color: var(--ink); }
.btn--primary:hover { background: #e6ff7a; }
.btn--ghost { background: transparent; border-color: rgba(201, 211, 204, 0.34); color: var(--paper); }
.btn--ghost:hover { border-color: var(--volt); color: var(--volt); }
.btn--ember { background: var(--ember); color: #1A0703; }
.btn--block { width: 100%; }
.btn--sm { padding: 7px 13px; font-size: 12.5px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 3px;
  border: var(--edge);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--line);
  background: rgba(30, 122, 90, 0.22);
}
.tag--volt { background: var(--volt); color: var(--ink); border-color: var(--volt); }
.tag--ember { background: rgba(255, 92, 53, 0.16); color: var(--ember); border-color: rgba(255, 92, 53, 0.5); }
.tag--live::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-out infinite;
}

.panel {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: var(--edge);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(18, 37, 30, 0.96), rgba(10, 20, 40, 0.92));
  box-shadow: var(--shadow-panel);
}
.panel--stack::before,
.panel--stack::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border: var(--edge-soft);
  border-radius: inherit;
  background: rgba(18, 37, 30, 0.6);
}
.panel--stack::before { transform: translate(9px, 9px) rotate(0.5deg); }
.panel--stack::after { transform: translate(-7px, 15px) rotate(-0.5deg); opacity: 0.5; }

.stat { display: grid; gap: 2px; }
.stat__value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--volt);
}
.stat__label {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--data);
}

.crumbs { font-size: 12.5px; color: var(--data); margin-bottom: 18px; }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: rgba(201, 211, 204, 0.4); }
.crumbs a { color: var(--line); border-bottom: 1px solid transparent; }
.crumbs a:hover { color: var(--volt); border-bottom-color: var(--volt); }
.crumbs [aria-current="page"] { color: var(--paper); }

.note {
  padding: 14px 16px;
  border-left: 3px solid var(--grass);
  background: rgba(30, 122, 90, 0.16);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13.5px;
  color: var(--line);
}
.asidenote {
  font-size: 13px;
  line-height: 1.7;
  color: var(--data);
  padding-left: 14px;
  border-left: 2px solid rgba(201, 211, 204, 0.24);
}

/* ---------- media（页面阶段放图） ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: var(--edge);
  border-radius: var(--radius);
  background: linear-gradient(140deg, #12251E 0%, #0A1428 100%);
}
.media__frame { position: relative; aspect-ratio: 16 / 9; }
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--portrait .media__frame { aspect-ratio: 3 / 4; }
.media--square .media__frame { aspect-ratio: 1 / 1; }
.media img { width: 100%; height: 100%; object-fit: cover; }
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(5, 8, 7, 0.16) 0 1px, transparent 1px 4px);
  mix-blend-mode: multiply;
  opacity: 0.5;
}
.media__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 14px 16px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(5, 8, 7, 0), rgba(5, 8, 7, 0.82));
}
.media--empty .media__frame::before {
  content: "赛场画面";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: rgba(138, 154, 146, 0.7);
}

/* ============================================================
   INTERACTION LAYER
   ============================================================ */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--volt), var(--ember));
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 70;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), background 0.18s var(--ease);
  box-shadow: 0 12px 30px rgba(5, 8, 7, 0.5);
}
.to-top[data-visible] { opacity: 1; pointer-events: auto; transform: none; }

.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.62s var(--ease), transform 0.62s var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- focus ---------- */
:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
  border-radius: 4px;
}
.rail-link:focus-visible,
.footer__link:focus-visible { outline-offset: 2px; }

/* ============================================================
   BREAKPOINTS
   ============================================================ */
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--aside { grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr); }
  .footer__grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail-w);
    padding: 26px 20px 22px;
    overflow-y: auto;
    border-right: var(--edge);
    border-bottom: 0;
    background: linear-gradient(180deg, #0A1428 0%, #08211B 55%, #0B2E24 100%);
    backdrop-filter: none;
  }
  .rail-top { min-height: 0; margin-bottom: 24px; }
  .nav-toggle { display: none; }
  .nav-scrim { display: none; }

  .rail-nav {
    position: static;
    width: auto;
    height: auto;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: visible;
    transform: none;
    background: none;
    border: 0;
    transition: none;
  }
  .rail-meta { margin-top: auto; }
}

@media (min-width: 1280px) {
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .tape[data-ready] .tape__track { animation: none !important; transform: none !important; }
  .progress { transition: none !important; }
  .to-top { transition: none !important; }
}