/* ==========================================================
   开云体育入口 · 共享样式表 /assets/site.css
   控制室底色 + 电光青刻度 + 信号橙行动色
   ========================================================== */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dt, dd, figure, blockquote {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; background: none; border: 0; }

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

table { border-collapse: collapse; }

/* ---------- tokens ---------- */
:root {
  --ink-900: #060C18;
  --ink-800: #0C1728;
  --ink-700: #16233A;
  --cy: #3CE0E0;
  --cy-soft: #8CF3F0;
  --signal: #FF6A2B;
  --amber: #FFB648;
  --lime: #9DFF6B;
  --text: #C6D2E2;
  --dim: #7E8EA6;
  --paper: #F1ECE2;
  --paper-ink: #2A1F1A;
  --head: #EAF2FF;

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

  --fs-12: 0.75rem;
  --fs-13: 0.8125rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-24: 1.5rem;
  --fs-32: 2rem;
  --fs-48: 3rem;
  --fs-72: 4.5rem;
  --fs-112: 7rem;
  --fs-160: 10rem;

  --bar-h: 64px;
  --gut: clamp(16px, 4vw, 56px);
  --gap: clamp(16px, 2.4vw, 32px);
  --r-lg: 28px;
  --r-md: 18px;
  --r-sm: 10px;
  --r-pill: 999px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --hair: 1px solid var(--ink-700);
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  padding-top: var(--bar-h);
  background-color: var(--ink-900);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 78% -6%, rgba(60, 224, 224, 0.10), transparent 68%),
    radial-gradient(720px 440px at 4% 98%, rgba(255, 106, 43, 0.07), transparent 70%);
}

body > header,
body > main,
body > footer,
body > .cmd-rail { position: relative; z-index: 1; }

main { display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--head);
}

p { line-height: 1.75; }

strong { color: var(--head); font-weight: 700; }

::selection { background: var(--cy); color: #04141a; }

:focus-visible {
  outline: 2px solid var(--cy);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- typography utilities ---------- */
.display-1 {
  font-size: clamp(2.75rem, 7.6vw, 7rem);
  letter-spacing: -0.03em;
  color: var(--head);
}

.display-2 {
  font-size: clamp(1.9rem, 4.4vw, 4.5rem);
  letter-spacing: -0.025em;
  color: var(--head);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cy);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cy);
  opacity: 0.7;
}

.lede {
  max-width: 42ch;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.8;
  color: var(--dim);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- layout ---------- */
.wrap {
  width: min(1440px, 100% - 2 * var(--gut));
  margin-inline: auto;
}

.wrap--narrow {
  width: min(960px, 100% - 2 * var(--gut));
  margin-inline: auto;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
}

@media (min-width: 768px) {
  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

  .rail-col {
    grid-column: 1 / span 2;
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .content-col { grid-column: 3 / span 10; }
}

/* ---------- breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--dim);
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 10px; }

.breadcrumb li::after {
  content: "/";
  color: var(--ink-700);
}

.breadcrumb li:last-child::after { content: none; }

.breadcrumb a:hover { color: var(--cy); }

/* ---------- buttons ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--cy);
  --btn-bd: var(--cy);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--btn-bd);
  border-radius: var(--r-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--signal {
  --btn-bg: var(--signal);
  --btn-fg: #190A02;
  --btn-bd: var(--signal);
}

.btn--signal:hover { box-shadow: 0 10px 28px -12px rgba(255, 106, 43, 0.9); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  --btn-bd: var(--ink-700);
}

.btn--ghost:hover { --btn-fg: var(--cy); --btn-bd: var(--cy); }

.btn--sm { padding: 7px 14px; font-size: 12px; }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  left: 14px;
  top: 12px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--signal);
  color: #190A02;
  font-size: var(--fs-13);
  font-weight: 700;
  transform: translateY(-220%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- command bar ---------- */
.cmd-bar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(6, 12, 24, 0.92);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: var(--hair);
  color: var(--text);
}

.cmd-bar__inner {
  width: min(1600px, 100%);
  margin-inline: auto;
  padding-inline: clamp(12px, 2vw, 28px);
  height: var(--bar-h);
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.5vw, 24px);
  transition: height 0.24s var(--ease);
}

.cmd-bar.is-condensed .cmd-bar__inner { height: 52px; }

.cmd-bar__brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.cmd-bar__mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: linear-gradient(140deg, var(--cy) 0%, #17A2B4 100%);
  color: #04141a;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.cmd-bar__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-16);
  letter-spacing: 0.01em;
  color: var(--head);
  white-space: nowrap;
}

.cmd-bar__index {
  flex: 0 0 auto;
  padding-left: clamp(10px, 1.4vw, 18px);
  border-left: var(--hair);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--cy);
  white-space: nowrap;
}

.cmd-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.cmd-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.cmd-nav__list::-webkit-scrollbar { display: none; }

.cmd-nav__item { flex: 0 0 auto; }

.cmd-nav__link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--r-pill);
  font-size: var(--fs-13);
  color: var(--dim);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.cmd-nav__link:hover {
  color: var(--cy-soft);
  background: rgba(60, 224, 224, 0.08);
}

.cmd-nav__link[aria-current="page"] {
  background: var(--cy);
  color: #04141a;
  font-weight: 700;
}

.cmd-bar__tail {
  flex: 0 0 auto;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-dot {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border: 1px solid rgba(157, 255, 107, 0.28);
  border-radius: var(--r-pill);
  background: rgba(157, 255, 107, 0.06);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lime);
  white-space: nowrap;
}

.live-dot__pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  animation: livePulse 2.4s ease-out infinite;
}

@keyframes livePulse {
  0% { box-shadow: 0 0 0 0 rgba(157, 255, 107, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(157, 255, 107, 0); }
  100% { box-shadow: 0 0 0 0 rgba(157, 255, 107, 0); }
}

.cmd-bar__cta { margin-left: 2px; }

.cmd-bar__toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: var(--hair);
  border-radius: var(--r-pill);
  cursor: pointer;
}

.cmd-bar__toggle-bars {
  position: relative;
  display: block;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--cy);
  transition: background-color 0.2s var(--ease);
}

.cmd-bar__toggle-bars::before,
.cmd-bar__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--cy);
  transition: transform 0.2s var(--ease);
}

.cmd-bar__toggle-bars::before { top: -4px; }
.cmd-bar__toggle-bars::after { top: 4px; }

.cmd-bar[data-open] .cmd-bar__toggle-bars { background: transparent; }
.cmd-bar[data-open] .cmd-bar__toggle-bars::before { transform: translateY(4px) rotate(45deg); }
.cmd-bar[data-open] .cmd-bar__toggle-bars::after { transform: translateY(-4px) rotate(-45deg); }

.cmd-bar__toggle-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--dim);
}

.cmd-bar__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cy) 0%, var(--cy-soft) 55%, var(--signal) 100%);
  will-change: transform;
}

/* ---------- vertical rail ---------- */
.cmd-rail {
  position: fixed;
  left: 10px;
  top: 50%;
  translate: 0 -50%;
  z-index: 80;
  display: none;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease);
}

.cmd-rail.is-on { opacity: 1; }

.cmd-rail__tick {
  display: block;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-700);
  transition: background-color 0.25s var(--ease), width 0.25s var(--ease);
}

.cmd-rail__tick.is-lit {
  width: 18px;
  background: var(--cy);
}

@media (min-width: 1024px) {
  .cmd-rail { display: flex; }
}

/* ---------- mobile navigation ---------- */
@media (max-width: 900px) {
  .live-dot { display: none; }
  .cmd-bar__name { display: none; }
  .cmd-bar__toggle { display: inline-flex; }
}

@media (max-width: 900px) {
  .cmd-bar[data-open] .cmd-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: min(72vh, 520px);
    overflow-y: auto;
    padding: 14px clamp(12px, 4vw, 24px) 20px;
    background: rgba(8, 15, 30, 0.98);
    border-top: 1px solid var(--cy);
    border-bottom: var(--hair);
    box-shadow: 0 26px 60px -30px rgba(0, 0, 0, 0.95);
  }

  .cmd-bar[data-open] .cmd-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 3px;
    overflow: visible;
  }

  .cmd-bar[data-open] .cmd-nav__link {
    display: block;
    padding: 13px 14px;
    border-radius: var(--r-sm);
    border: 1px solid transparent;
    font-size: var(--fs-16);
    color: var(--text);
  }

  .cmd-bar[data-open] .cmd-nav__link:hover {
    border-color: rgba(60, 224, 224, 0.4);
    background: rgba(60, 224, 224, 0.08);
    color: var(--cy-soft);
  }

  .cmd-bar[data-open] .cmd-nav__link[aria-current="page"] {
    background: var(--cy);
    color: #04141a;
  }
}

@media (max-width: 620px) {
  :root { --bar-h: 96px; }

  .cmd-bar__inner {
    height: var(--bar-h);
    flex-wrap: wrap;
    align-content: center;
    row-gap: 8px;
    padding-block: 8px;
  }

  .cmd-bar__brand { order: 1; }

  .cmd-bar__index {
    order: 2;
    padding-left: 10px;
    font-size: 11px;
  }

  .cmd-bar__tail {
    order: 3;
    gap: 6px;
  }

  .cmd-nav {
    order: 4;
    flex: 0 0 100%;
    width: 100%;
  }

  .cmd-bar__cta { padding: 9px 15px; }

  .cmd-bar__toggle-label { display: none; }
}

/* ---------- footer ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(56px, 9vw, 140px);
  border-top: var(--hair);
  background-color: var(--ink-900);
}

.site-foot::before {
  content: "";
  display: block;
  height: 6px;
  opacity: 0.42;
  background-image: repeating-linear-gradient(90deg, var(--cy) 0 1px, transparent 1px 14px);
}

.site-foot__inner {
  width: min(1440px, 100% - 2 * var(--gut));
  margin-inline: auto;
  padding-block: clamp(36px, 5vw, 72px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3vw, 48px);
}

@media (min-width: 700px) {
  .site-foot__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1080px) {
  .site-foot__inner { grid-template-columns: 1.5fr 1fr 1fr 1.3fr; }
}

.foot-seg { min-width: 0; }

.foot-slogan {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.6vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--head);
}

.foot-brand {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.18em;
  color: var(--cy);
}

.tick-rule {
  display: block;
  width: 100%;
  max-width: 260px;
  height: 8px;
  margin-top: 16px;
  opacity: 0.5;
  background-image: repeating-linear-gradient(90deg, var(--cy) 0 1px, transparent 1px 10px);
}

.foot-note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--dim);
}

.foot-heading {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
}

.foot-list { display: grid; gap: 9px; }

.foot-link {
  font-size: var(--fs-13);
  color: var(--text);
  transition: color 0.18s var(--ease);
}

.foot-link:hover { color: var(--cy); }

.foot-meta {
  display: grid;
  gap: 4px;
  font-size: var(--fs-13);
}

.foot-meta dt {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--dim);
}

.foot-meta dt:first-child { margin-top: 0; }

.foot-meta dd {
  color: var(--text);
  overflow-wrap: anywhere;
}

.site-foot__bar {
  border-top: var(--hair);
  background-image: repeating-linear-gradient(90deg, rgba(22, 35, 58, 0.9) 0 1px, transparent 1px 18px);
  background-size: 100% 100%;
}

.site-foot__bar-inner {
  width: min(1440px, 100% - 2 * var(--gut));
  margin-inline: auto;
  padding-block: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--dim);
}

/* ---------- media frame ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: var(--hair);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  z-index: 2;
  border: 1px solid rgba(60, 224, 224, 0.22);
  border-radius: calc(var(--r-lg) - 10px);
  pointer-events: none;
}

.img-frame--screen { aspect-ratio: 16 / 9; }

.img-frame--tall {
  aspect-ratio: 3 / 4;
  border-radius: var(--r-md);
}

.img-frame--slant {
  border-radius: var(--r-md);
  clip-path: polygon(0 2.5%, 100% 0, 100% 97.5%, 0 100%);
}

.img-frame--plate {
  aspect-ratio: 4 / 3;
  border-color: #D6CCBB;
  border-radius: var(--r-md);
  background: var(--paper);
}

.img-frame--plate::before {
  border-color: rgba(42, 31, 26, 0.28);
  border-radius: calc(var(--r-md) - 10px);
}

.img-frame__caption {
  display: block;
  max-width: 40ch;
  margin-top: 12px;
  padding: 7px 11px;
  border-radius: 4px;
  background: var(--paper);
  color: var(--paper-ink);
  font-size: var(--fs-12);
  line-height: 1.55;
}

/* ---------- exhibition plate ---------- */
.plate {
  display: block;
  max-width: 34ch;
  padding: 12px 14px;
  border-radius: var(--r-sm);
  background: var(--paper);
  color: var(--paper-ink);
  font-size: var(--fs-12);
  line-height: 1.65;
}

.plate__label {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #7A675A;
}

/* ---------- data table ---------- */
.data-table {
  width: 100%;
  font-size: var(--fs-13);
  line-height: 1.5;
}

.data-table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}

.data-table th,
.data-table td {
  padding: 11px 12px;
  border-bottom: var(--hair);
  text-align: left;
  vertical-align: top;
}

.data-table thead th {
  background: var(--ink-800);
  color: var(--dim);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.data-table tbody tr:nth-child(even) { background: rgba(22, 35, 58, 0.5); }

.data-table tbody tr:hover { background: rgba(60, 224, 224, 0.07); }

.data-table td.num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--head);
}

/* ---------- reveal ---------- */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.js-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- motion preferences ---------- */
@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-ready .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .cmd-bar__progress { transition: none; }
}