/* ============================================================
   开云体育 · 城市心脏主场看台 — 共享样式 /assets/site.css
   ============================================================ */

*, *::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, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; }
img { display: block; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

:root {
  --ky-night: #071426;
  --ky-ink: #0D223D;
  --ky-steppe: #123A5E;
  --ky-orange: #FF6B1A;
  --ky-amber: #FFA24D;
  --ky-green: #39FF88;
  --ky-red: #FF3B4E;
  --ky-white: #F2F7FF;
  --ky-mist: #8FA5BF;
  --ky-line: #2A4A6B;
  --ky-line-soft: rgba(42, 74, 107, .55);
  --ky-line-faint: rgba(42, 74, 107, .28);
  --ky-shell: 1340px;
  --ky-gutter: clamp(18px, 4.2vw, 60px);
  --ky-header-h: 68px;
  --ky-font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ky-font-mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --ky-ease: cubic-bezier(.22, .72, .24, 1);
}

html { background-color: var(--ky-night); }

body {
  min-height: 100%;
  background-color: var(--ky-night);
  background-image:
    linear-gradient(rgba(42, 74, 107, .13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 74, 107, .13) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: center top;
  color: var(--ky-white);
  font-family: var(--ky-font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-weight: 800; line-height: 1.1; letter-spacing: -.01em; }
h1 { font-size: clamp(32px, 5.4vw, 72px); line-height: 1.03; }
h2 { font-size: clamp(24px, 3vw, 40px); }
h3 { font-size: clamp(19px, 1.8vw, 26px); line-height: 1.25; }

::selection { background: var(--ky-orange); color: #08131f; }

:focus-visible {
  outline: 2px solid var(--ky-orange);
  outline-offset: 3px;
}

/* ---------- 布局容器 ---------- */
.ky-shell {
  width: 100%;
  max-width: var(--ky-shell);
  margin-inline: auto;
  padding-inline: var(--ky-gutter);
}

.ky-main { display: block; min-height: 62vh; }

.ky-prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ky-mist);
}
.ky-prose > * + * { margin-top: 1.05em; }
.ky-prose h2, .ky-prose h3 { color: var(--ky-white); margin-top: 1.7em; }
.ky-prose strong { color: var(--ky-white); font-weight: 700; }
.ky-prose a { color: var(--ky-amber); text-decoration: none; border-bottom: 1px solid var(--ky-line); }
.ky-prose a:hover { border-bottom-color: var(--ky-orange); }

/* ---------- 面包屑 ---------- */
.ky-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 8px;
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ky-mist);
}
.ky-breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.ky-breadcrumb li + li::before { content: "/"; color: var(--ky-line); }
.ky-breadcrumb a { color: var(--ky-mist); text-decoration: none; transition: color .18s var(--ky-ease); }
.ky-breadcrumb a:hover { color: var(--ky-amber); }
.ky-breadcrumb [aria-current="page"] { color: var(--ky-white); }

/* ---------- 跳过链接 ---------- */
.ky-skip {
  position: absolute;
  left: var(--ky-gutter);
  top: -80px;
  z-index: 130;
  display: inline-block;
  padding: 11px 18px;
  background: var(--ky-orange);
  color: #08131f;
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  transition: top .2s var(--ky-ease);
}
.ky-skip:focus-visible { top: 12px; }

/* ============================================================
   头部 · 紧凑命令栏
   ============================================================ */
.ky-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 20, 38, .9);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--ky-line);
}

.ky-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(42, 74, 107, .45);
  overflow: hidden;
  pointer-events: none;
}
.ky-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--ky-orange), var(--ky-amber));
  transition: width .12s linear;
}

.ky-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.2vw, 32px);
  width: 100%;
  max-width: var(--ky-shell);
  min-height: var(--ky-header-h);
  margin-inline: auto;
  padding: 10px var(--ky-gutter);
}

/* 品牌 */
.ky-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  text-decoration: none;
}
.ky-brand__pulse {
  width: 11px;
  height: 11px;
  flex: 0 0 auto;
  background: var(--ky-orange);
  box-shadow: 0 0 12px rgba(255, 107, 26, .8);
  animation: ky-pulse 2.6s var(--ky-ease) infinite;
}
.ky-brand__text { display: flex; flex-direction: column; line-height: 1; }
.ky-brand__name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--ky-white);
}
.ky-brand__sub {
  margin-top: 5px;
  font-family: var(--ky-font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--ky-mist);
}

@keyframes ky-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(255, 107, 26, .55), 0 0 12px rgba(255, 107, 26, .8); }
  70%  { box-shadow: 0 0 0 13px rgba(255, 107, 26, 0), 0 0 12px rgba(255, 107, 26, .4); }
  100% { box-shadow: 0 0 0 0 rgba(255, 107, 26, 0), 0 0 12px rgba(255, 107, 26, .8); }
}

/* 导航 · 桌面横排 */
.ky-nav { flex: 1 1 auto; min-width: 0; }
.ky-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0px, .7vw, 8px);
}
.ky-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 10px 8px;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  font-weight: 700;
  color: var(--ky-mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ky-ease), border-color .18s var(--ky-ease);
}
.ky-nav__index {
  font-family: var(--ky-font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ky-line);
  transition: color .18s var(--ky-ease);
}
.ky-nav__link:hover { color: var(--ky-white); border-bottom-color: var(--ky-line); }
.ky-nav__link:hover .ky-nav__index { color: var(--ky-amber); }
.ky-nav__link[aria-current="page"] { color: var(--ky-white); border-bottom-color: var(--ky-orange); }
.ky-nav__link[aria-current="page"] .ky-nav__index { color: var(--ky-orange); }

/* 右侧状态与入口 */
.ky-header__side {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex: 0 0 auto;
}
.ky-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1px solid var(--ky-line);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ky-mist);
  white-space: nowrap;
}
.ky-status__dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--ky-green);
  box-shadow: 0 0 9px rgba(57, 255, 136, .9);
}
.ky-header__cta { padding: 10px 16px; font-size: 13px; }

.ky-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--ky-line);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ky-white);
  transition: border-color .18s var(--ky-ease), color .18s var(--ky-ease);
}
.ky-nav-toggle:hover { border-color: var(--ky-orange); color: var(--ky-amber); }
.ky-nav-toggle__bars { position: relative; display: block; width: 16px; height: 10px; }
.ky-nav-toggle__bars::before,
.ky-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--ky-orange);
  transition: transform .22s var(--ky-ease), top .22s var(--ky-ease);
}
.ky-nav-toggle__bars::before { top: 0; }
.ky-nav-toggle__bars::after { top: 8px; }
.ky-nav-toggle[aria-expanded="true"] .ky-nav-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.ky-nav-toggle[aria-expanded="true"] .ky-nav-toggle__bars::after { top: 4px; transform: rotate(-45deg); }

/* ============================================================
   动效协议
   ============================================================ */
html.ky-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .62s var(--ky-ease), transform .68s var(--ky-ease);
  will-change: opacity, transform;
}
html.ky-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   通用原子
   ============================================================ */
.ky-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: 13px 22px;
  border: 1px solid var(--ky-line);
  background: transparent;
  color: var(--ky-white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: 0;
  transition: background-color .18s var(--ky-ease), border-color .18s var(--ky-ease), color .18s var(--ky-ease), transform .18s var(--ky-ease);
}
.ky-btn:hover { border-color: var(--ky-orange); color: var(--ky-amber); }
.ky-btn:active { transform: translateY(1px); }
.ky-btn--primary {
  background: var(--ky-orange);
  border-color: var(--ky-orange);
  color: #08131f;
  font-weight: 800;
}
.ky-btn--primary:hover { background: var(--ky-amber); border-color: var(--ky-amber); color: #08131f; }
.ky-btn--ghost { color: var(--ky-mist); }

.ky-grid { display: grid; gap: clamp(18px, 2.4vw, 30px); }
.ky-grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.ky-grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.ky-grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); }

.ky-panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  background: var(--ky-ink);
  border: 1px solid var(--ky-line);
}
.ky-panel::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 15px;
  height: 15px;
  border-top: 1px solid var(--ky-orange);
  border-right: 1px solid var(--ky-orange);
  opacity: .75;
  pointer-events: none;
}
.ky-panel--accent { border-left: 3px solid var(--ky-orange); }

.ky-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--ky-line);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ky-mist);
}
.ky-label--orange { color: var(--ky-orange); border-color: rgba(255, 107, 26, .5); }
.ky-label--green { color: var(--ky-green); border-color: rgba(57, 255, 136, .38); }
.ky-label--red { color: var(--ky-red); border-color: rgba(255, 59, 78, .4); }

.ky-kicker {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ky-orange);
}

.ky-num {
  display: block;
  font-family: var(--ky-font-mono);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: var(--ky-white);
}
.ky-num--lg { font-size: clamp(36px, 5vw, 64px); }
.ky-num--xl { font-size: clamp(56px, 9vw, 124px); }

.ky-rule { height: 1px; border: 0; margin: 0; background: var(--ky-line); }
.ky-rule--accent { background: linear-gradient(90deg, var(--ky-orange), rgba(255, 107, 26, 0)); }

/* ---------- 图片容器（无远程资源，自带网格底纹占位） ---------- */
.ky-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--ky-line);
  background-color: var(--ky-steppe);
  background-image:
    linear-gradient(135deg, rgba(18, 58, 94, .9), rgba(7, 20, 38, .96)),
    repeating-linear-gradient(0deg, rgba(42, 74, 107, .5) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(90deg, rgba(42, 74, 107, .5) 0 1px, transparent 1px 30px);
}
.ky-media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.ky-media__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 11px;
  background: var(--ky-orange);
  color: #08131f;
  font-family: var(--ky-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
}
.ky-media--wide { aspect-ratio: 21 / 9; }
.ky-media--tall { aspect-ratio: 3 / 4; }
.ky-media--portrait { aspect-ratio: 4 / 5; }
.ky-media--square { aspect-ratio: 1 / 1; }

/* ============================================================
   页脚
   ============================================================ */
.ky-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 148px);
  background: var(--ky-ink);
  border-top: 1px solid var(--ky-line);
  overflow: hidden;
}
.ky-footer__glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--ky-orange), rgba(255, 107, 26, .1) 48%, var(--ky-green));
  opacity: .9;
}
.ky-footer__inner {
  width: 100%;
  max-width: var(--ky-shell);
  margin-inline: auto;
  padding: clamp(38px, 5vw, 74px) var(--ky-gutter) 26px;
}
.ky-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.1fr 1fr;
  gap: clamp(24px, 3.4vw, 54px);
  padding-bottom: clamp(28px, 3.4vw, 46px);
  border-bottom: 1px solid var(--ky-line);
}
.ky-footer__col { min-width: 0; }

.ky-footer__brand {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--ky-white);
}
.ky-footer__tag {
  margin-top: 9px;
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ky-orange);
}
.ky-footer__note {
  margin-top: 14px;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ky-mist);
}
.ky-footer__icp {
  display: inline-block;
  margin-top: 18px;
  padding: 6px 10px;
  border: 1px solid var(--ky-line);
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ky-mist);
}

.ky-footer__title {
  margin-bottom: 15px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--ky-line);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ky-white);
}

.ky-footer__list { display: grid; gap: 10px; font-size: 14px; }
.ky-footer__list a {
  color: var(--ky-mist);
  text-decoration: none;
  transition: color .18s var(--ky-ease);
}
.ky-footer__list a:hover { color: var(--ky-amber); }

.ky-footer__list--index a { display: inline-flex; align-items: center; gap: 9px; }
.ky-footer__list--index a::before {
  content: "";
  width: 6px;
  height: 1px;
  background: var(--ky-line);
  transition: width .2s var(--ky-ease), background-color .2s var(--ky-ease);
}
.ky-footer__list--index a:hover::before { width: 18px; background: var(--ky-orange); }

.ky-footer__list--meta li { display: grid; gap: 3px; color: var(--ky-mist); }
.ky-footer__k {
  font-family: var(--ky-font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: rgba(143, 165, 191, .62);
}

.ky-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding-top: 22px;
}
.ky-footer__legal-links { display: flex; flex-wrap: wrap; gap: 18px; }
.ky-footer__legal-links a {
  font-size: 13px;
  color: var(--ky-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ky-ease), border-color .18s var(--ky-ease);
}
.ky-footer__legal-links a:hover { color: var(--ky-white); border-bottom-color: var(--ky-orange); }
.ky-footer__copy {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ky-mist);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .ky-status { display: none; }
}

@media (max-width: 1000px) {
  .ky-nav-toggle { display: inline-flex; }
  .ky-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100vh - var(--ky-header-h));
    overflow-y: auto;
    padding: 8px var(--ky-gutter) 26px;
    background: var(--ky-ink);
    border-bottom: 2px solid var(--ky-orange);
    box-shadow: 0 30px 70px rgba(0, 0, 0, .62);
  }
  .ky-nav[data-open="true"] {
    display: block;
    animation: ky-drawer .26s var(--ky-ease);
  }
  .ky-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .ky-nav__link {
    justify-content: flex-start;
    padding: 16px 2px;
    border-bottom: 1px solid var(--ky-line-soft);
    font-size: 16px;
  }
  .ky-nav__link[aria-current="page"] { border-bottom-color: var(--ky-orange); }
  .ky-nav__index { font-size: 11px; }

  .ky-footer__grid { grid-template-columns: 1fr 1fr; }
}

@keyframes ky-drawer {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: none; }
}

@media (max-width: 720px) {
  .ky-brand__sub { display: none; }
  .ky-prose { font-size: 16px; }
  .ky-footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .ky-footer__note { max-width: none; }
  .ky-footer__legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 600px) {
  .ky-header__cta { display: none; }
  .ky-breadcrumb { font-size: 10px; letter-spacing: .08em; }
}

@media (max-width: 400px) {
  .ky-nav-toggle__label { display: none; }
}

/* ============================================================
   可访问性 · 减弱动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.ky-js [data-reveal],
  html.ky-js [data-reveal].is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}