/* =========================================================
   云开体育主站 · 共享样式 /assets/site.css
   夜间赛场控制台 · 深墨蓝底 + 青柠荧光绿 + 琥珀橙
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; }
input, select, textarea { font: inherit; color: inherit; }

/* ---------- 变量 ---------- */
:root {
  --ink: #0A1324;
  --panel: #111D33;
  --line: #22304C;
  --lime: #B6FF3B;
  --lime-soft: rgba(182, 255, 59, 0.10);
  --amber: #FF9C2B;
  --amber-soft: rgba(255, 156, 43, 0.12);
  --cyan: #2FE3C4;
  --muted: #6E6A8A;
  --snow: #E9F0F8;
  --dim: #93A2B8;
  --alert: #FF6B5E;

  --rail: 76px;
  --gap: 24px;
  --maxw: 1280px;

  --font-display: "Barlow Condensed", "Oswald", "Arial Narrow", "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
  --font-body: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --r-lg: 14px;
  --r-sm: 4px;
  --t-fast: 120ms ease;
  --t-base: 200ms ease;
  --t-drawer: 260ms cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 页面骨架 ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail);
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 560px at 12% -6%, rgba(47, 227, 196, 0.06), transparent 62%),
    radial-gradient(760px 480px at 96% 4%, rgba(255, 156, 43, 0.05), transparent 60%);
  background-repeat: no-repeat;
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ---------- 跳转链接 ---------- */
.yk-skip {
  position: fixed;
  top: 10px;
  left: calc(var(--rail) + 12px);
  z-index: 300;
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--r-sm);
  background: var(--lime);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: translateY(-240%);
  transition: transform var(--t-base);
}
.yk-skip:focus { transform: translateY(0); }

/* =========================================================
   品牌轨道 / 页头
   ========================================================= */
.yk-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 120;
  width: var(--rail);
  display: flex;
  flex-direction: column;
}

.yk-rail {
  position: relative;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 22px;
  background-color: transparent;
  border-right: 1px solid transparent;
  transition: background-color var(--t-base), border-color var(--t-base);
}
.yk-header[data-scrolled="true"] .yk-rail {
  background-color: rgba(17, 29, 51, 0.92);
  border-right-color: var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

/* 品牌 */
.yk-rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 4px;
}

.yk-bmark {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
  width: 32px;
  height: 32px;
}
.yk-bmark--sm { width: 22px; height: 22px; gap: 2px; }
.yk-bmark__bar {
  display: block;
  width: 100%;
  border-radius: 1px;
  background-color: var(--line);
  transition: background-color var(--t-fast);
}
.yk-bmark__bar:nth-child(1) { height: 38%; }
.yk-bmark__bar:nth-child(2) { height: 68%; }
.yk-bmark__bar:nth-child(3) { height: 100%; background-color: var(--lime); }
.yk-rail__brand:hover .yk-bmark__bar,
.yk-rail__brand:focus-visible .yk-bmark__bar { background-color: var(--cyan); }

.yk-rail__brandtext { display: flex; flex-direction: column; align-items: center; }
.yk-rail__cname {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--snow);
  transition: color var(--t-fast);
}
.yk-rail__brand:hover .yk-rail__cname { color: var(--lime); }

/* 移动端汉堡（桌面隐藏） */
.yk-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--snow);
  transition: border-color var(--t-fast), color var(--t-fast);
}
.yk-nav-toggle:hover { border-color: var(--lime); color: var(--lime); }
.yk-nav-toggle__box { display: grid; gap: 4px; width: 16px; }
.yk-nav-toggle__box span {
  display: block;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.yk-nav-toggle__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
}

/* 主导航 */
.yk-rail__nav {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  scrollbar-width: none;
}
.yk-rail__nav::-webkit-scrollbar { width: 0; height: 0; }

.yk-rail__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 4px 0;
}

.yk-rail__link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  padding: 12px 0;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background-color: rgba(17, 29, 51, 0.42);
  color: var(--dim);
  transition: color var(--t-fast), border-color var(--t-fast), background-color var(--t-fast);
}
.yk-rail__txt {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
}
.yk-rail__link:hover,
.yk-rail__link:focus-visible {
  color: var(--lime);
  border-color: rgba(182, 255, 59, 0.5);
  background-color: var(--lime-soft);
}
.yk-rail__link[aria-current="page"] {
  color: var(--lime);
  border-color: var(--lime);
  background-color: var(--lime-soft);
}

/* 轨道底部：状态 + 主行动 */
.yk-rail__foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 0 8px;
}

.yk-status {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
}
.yk-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--lime);
  box-shadow: 0 0 0 0 rgba(182, 255, 59, 0.55);
  animation: yk-breathe 1.8s ease-in-out infinite;
}
.yk-status__txt {
  writing-mode: vertical-rl;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--dim);
}

@keyframes yk-breathe {
  0%, 100% { box-shadow: 0 0 0 0 rgba(182, 255, 59, 0.5); opacity: 1; }
  60% { box-shadow: 0 0 0 7px rgba(182, 255, 59, 0); opacity: 0.72; }
}

.yk-rail__cta {
  writing-mode: vertical-rl;
  width: auto;
  min-height: 0;
  padding: 16px 11px;
  font-size: 13px;
  letter-spacing: 0.14em;
}

/* 竖向滚动进度 */
.yk-progress {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  display: block;
  background-color: rgba(34, 48, 76, 0.6);
}
.yk-progress__bar {
  display: block;
  width: 100%;
  height: 0;
  background-image: linear-gradient(180deg, var(--lime), var(--cyan));
  transition: height 90ms linear;
}

/* =========================================================
   通用按钮 / 标签 / 卡片 / 栅格 / 正文
   ========================================================= */
.yk-container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

.yk-section { position: relative; padding-block: clamp(48px, 7vw, 96px); }

.yk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background-color: transparent;
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  transition: color var(--t-fast), border-color var(--t-fast), background-color var(--t-fast);
}
.yk-btn:hover { border-color: var(--lime); color: var(--lime); }

.yk-btn--lime {
  background-color: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}
.yk-btn--lime:hover {
  background-color: #C8FF6B;
  border-color: #C8FF6B;
  color: var(--ink);
}

.yk-btn--ghost {
  border-color: rgba(255, 156, 43, 0.65);
  color: var(--amber);
}
.yk-btn--ghost:hover {
  background-color: var(--amber-soft);
  border-color: var(--amber);
  color: var(--amber);
}

.yk-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 24px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}
.yk-chip--lime { border-color: rgba(182, 255, 59, 0.55); color: var(--lime); }
.yk-chip--amber { border-color: rgba(255, 156, 43, 0.55); color: var(--amber); }

.yk-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background-color: rgba(17, 29, 51, 0.6);
  padding: clamp(20px, 3vw, 32px);
  transition: border-color var(--t-fast), background-color var(--t-fast);
}
.yk-card:hover { border-color: rgba(182, 255, 59, 0.45); }
.yk-card--offset { transform: translateY(-16px); }
.yk-card--offset:nth-child(even) { transform: translateY(16px); }

.yk-notch { clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%); }

.yk-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.yk-grid--7-5 > .yk-grid__main { grid-column: span 7; }
.yk-grid--7-5 > .yk-grid__aside { grid-column: span 5; }
.yk-grid--split > * { grid-column: span 6; }

/* 排版基元 */
.yk-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.yk-eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background-color: var(--cyan);
}

.yk-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(48px, 9vw, 112px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--snow);
}
.yk-display em { font-style: normal; color: var(--lime); }

.yk-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.yk-h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--snow);
}

.yk-body { color: var(--dim); max-width: 68ch; }
.yk-body + .yk-body { margin-top: 14px; }

.yk-data {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}

.yk-link {
  color: var(--lime);
  border-bottom: 1px solid rgba(182, 255, 59, 0.35);
  transition: border-color var(--t-fast), color var(--t-fast);
}
.yk-link:hover { border-bottom-color: var(--lime); }

/* 图片容器（供页面阶段放入图片或占位） */
.yk-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background-color: var(--panel);
}
.yk-media--wide { aspect-ratio: 21 / 9; }
.yk-media--tall { aspect-ratio: 4 / 5; }
.yk-media--square { aspect-ratio: 1 / 1; }
.yk-media > img,
.yk-media > picture,
.yk-media > video,
.yk-media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.yk-media__ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image:
    linear-gradient(115deg, transparent 46%, rgba(182, 255, 59, 0.16) 46.4%, transparent 47%),
    linear-gradient(115deg, transparent 66%, rgba(47, 227, 196, 0.14) 66.3%, transparent 67%),
    linear-gradient(180deg, rgba(17, 29, 51, 0.2), rgba(10, 19, 36, 0.85));
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 面包屑 */
.yk-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 20px 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.yk-crumbs__sep { color: var(--line); }
.yk-crumbs a { color: var(--dim); transition: color var(--t-fast); }
.yk-crumbs a:hover { color: var(--lime); }
.yk-crumbs [aria-current="page"] { color: var(--cyan); }

/* =========================================================
   页脚
   ========================================================= */
.yk-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 120px);
  padding-block: clamp(44px, 6vw, 72px) 28px;
  border-top: 1px solid var(--line);
  background-image: linear-gradient(180deg, rgba(17, 29, 51, 0) 0%, rgba(17, 29, 51, 0.72) 100%);
}
.yk-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 128px;
  height: 2px;
  background-image: linear-gradient(90deg, var(--lime), rgba(182, 255, 59, 0));
}

.yk-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: 40px 32px;
}

.yk-footer__col { min-width: 0; }

.yk-footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.yk-footer__brandtext {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--snow);
}

.yk-footer__desc {
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dim);
}

.yk-footer__data {
  margin-top: 14px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.yk-footer__title {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--cyan);
}

.yk-footer__list { display: flex; flex-direction: column; gap: 9px; }

.yk-footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--dim);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.yk-footer__link:hover,
.yk-footer__link:focus-visible {
  color: var(--lime);
  border-bottom-color: rgba(182, 255, 59, 0.5);
}

.yk-footer__contact {
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--dim);
}
.yk-footer__strong {
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--snow);
  font-variant-numeric: tabular-nums;
}

.yk-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  margin-top: clamp(36px, 5vw, 56px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.yk-footer__legalList {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}
.yk-footer__legalLink {
  font-size: 13px;
  color: var(--dim);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.yk-footer__legalLink:hover,
.yk-footer__legalLink:focus-visible {
  color: var(--amber);
  border-bottom-color: rgba(255, 156, 43, 0.55);
}

.yk-footer__copy {
  font-size: 12.5px;
  color: var(--muted);
}

.yk-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed rgba(34, 48, 76, 0.8);
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.10em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.yk-footer__metaSep { color: var(--line); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .yk-footer__grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .yk-footer__col--contact { grid-column: span 3; }
}

@media (max-width: 900px) {
  :root { --rail: 0px; }

  body {
    padding-left: 0;
    padding-top: 62px;
  }

  .yk-skip { left: 12px; }

  .yk-header {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: auto;
  }

  .yk-rail {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 9px 16px;
    background-color: rgba(10, 19, 36, 0.92);
    border-right: 0;
    border-bottom: 1px solid var(--line);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }
  .yk-header[data-scrolled="true"] .yk-rail {
    background-color: rgba(17, 29, 51, 0.97);
    border-right: 0;
    border-bottom-color: var(--line);
  }

  .yk-rail__brand { flex-direction: row; gap: 10px; }
  .yk-rail__brandtext { flex-direction: row; }
  .yk-rail__cname {
    writing-mode: horizontal-tb;
    font-size: 16px;
    letter-spacing: 0.10em;
  }

  .yk-nav-toggle { display: inline-flex; }

  .yk-rail__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 130;
    flex: 0 0 auto;
    width: min(330px, 84vw);
    align-items: stretch;
    justify-content: flex-start;
    padding: 78px 20px 28px;
    background-color: var(--panel);
    border-left: 1px solid var(--line);
    box-shadow: -24px 0 48px rgba(4, 9, 18, 0.55);
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform var(--t-drawer);
  }
  .yk-header[data-open="true"] .yk-rail__nav { transform: translateX(0); }

  .yk-rail__list { align-items: stretch; gap: 6px; padding: 0; }
  .yk-rail__link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 16px;
    background-color: rgba(10, 19, 36, 0.5);
  }
  .yk-rail__txt {
    writing-mode: horizontal-tb;
    font-size: 16px;
    letter-spacing: 0.05em;
  }

  .yk-rail__foot {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    width: auto;
    padding: 0;
  }
  .yk-status { flex-direction: row; align-items: center; gap: 8px; }
  .yk-status__txt { writing-mode: horizontal-tb; font-size: 11px; letter-spacing: 0.12em; }
  .yk-status__txt { display: none; }

  .yk-rail__cta {
    writing-mode: horizontal-tb;
    padding: 0 16px;
    min-height: 38px;
    font-size: 13.5px;
  }

  .yk-progress { display: none; }

  .yk-grid,
  .yk-grid--7-5,
  .yk-grid--split { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 20px; }
  .yk-grid--7-5 > .yk-grid__main,
  .yk-grid--7-5 > .yk-grid__aside,
  .yk-grid--split > * { grid-column: span 6; }

  .yk-card--offset,
  .yk-card--offset:nth-child(even) { transform: none; }

  .yk-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 24px; }
  .yk-footer__col--brand { grid-column: span 2; }
  .yk-footer__col--contact { grid-column: span 2; }
  .yk-footer__legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .yk-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .yk-footer__col--brand,
  .yk-footer__col--contact { grid-column: span 1; }
  .yk-footer__legalList { gap: 10px 18px; }
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .yk-status__dot { animation: none; box-shadow: 0 0 0 3px rgba(182, 255, 59, 0.22); }
  .yk-card--offset,
  .yk-card--offset:nth-child(even) { transform: none; }
  .yk-progress__bar { transition: none; }
}