/* ==========================================================================
   云博赛事 · 共享外壳样式表  /assets/site.css
   骨架：左侧框式导航柱 + 右侧宽幅内容区 + 贯穿刻度条
   ========================================================================== */

:root {
  --blue: #0057B8;
  --blue-deep: #00408A;
  --space: #1A1D24;
  --neon: #00E676;
  --alert: #FF6B35;
  --ink: #0B0E14;
  --paper: #F5F7FA;
  --glass: rgba(255, 255, 255, 0.72);
  --steel: #2A3038;
  --muted: #6B7683;
  --mist: #E3EDF9;
  --green-mist: #D9FFEC;
  --hair: rgba(11, 14, 20, 0.14);
  --hair-dark: rgba(245, 247, 250, 0.12);
  --font-display: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: var(--font-display);
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  --frame-w: 268px;
  --pad: clamp(16px, 4vw, 44px);
  --maxw: 1200px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: inherit;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

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

a { color: var(--blue); text-decoration: none; }

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

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

table { border-collapse: collapse; width: 100%; }

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

:target { scroll-margin-top: 120px; }

@media (min-width: 960px) {
  body { padding-left: var(--frame-w); }
}

/* --------------------------------------------------------------------------
   跳过链接
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -120px;
  left: 14px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--neon);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 14px; }

/* --------------------------------------------------------------------------
   头部：移动端顶部粘性条 → 桌面端左侧常驻框式导航柱
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--space);
  color: var(--paper);
  border-bottom: 1px solid var(--hair-dark);
}

.header-frame {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.header-top {
  display: flex;
  align-items: center;
  gap: 12px;
  order: 0;
  border-bottom: 1px solid var(--hair-dark);
}

/* 品牌 ---------------------------------------------------------------- */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 1 1 auto;
  min-width: 0;
  padding: 15px var(--pad);
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
  animation: dotPulse 1.6s var(--ease) infinite;
}

.brand__text { min-width: 0; }

.brand__name {
  display: block;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: #FFFFFF;
}

.brand__sub {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.55); }
  50% { box-shadow: 0 0 0 7px rgba(0, 230, 118, 0); }
}

/* 移动导航按钮 -------------------------------------------------------- */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: 14px;
  padding: 11px 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--hair-dark);
  border-radius: 2px;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-toggle:hover,
.nav-toggle:focus-visible { border-color: var(--blue); background: var(--blue); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle__bar {
  display: block;
  width: 15px;
  height: 2px;
  background: var(--neon);
}
.nav-toggle__label { line-height: 1; }

/* 主导航 -------------------------------------------------------------- */
.site-nav {
  display: none;
  order: 2;
  border-bottom: 1px solid var(--hair-dark);
}
.site-header[data-open] .site-nav { display: block; }

.site-nav__title {
  margin: 0;
  padding: 14px var(--pad) 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-list { display: flex; flex-direction: column; }

.nav-item { display: block; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px var(--pad);
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: rgba(245, 247, 250, 0.74);
  border-left: 3px solid transparent;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.nav-link__idx {
  flex: none;
  min-width: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.nav-link__label { min-width: 0; }

.nav-link:hover,
.nav-link:focus-visible {
  color: #FFFFFF;
  background: var(--blue);
  border-left-color: var(--neon);
}
.nav-link:hover .nav-link__idx,
.nav-link:focus-visible .nav-link__idx { color: var(--neon); }

.nav-link[aria-current="page"] {
  color: #FFFFFF;
  background: rgba(0, 87, 184, 0.42);
  border-left-color: var(--neon);
}
.nav-link[aria-current="page"] .nav-link__idx { color: var(--neon); }

/* 刷新刻度条 ---------------------------------------------------------- */
.header-rail {
  order: 1;
  padding: 12px var(--pad) 14px;
  background: rgba(0, 0, 0, 0.18);
  border-top: 1px solid var(--hair-dark);
}

.header-rail__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.rail-ticks {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 14px;
  margin: 0 0 9px;
}
.rail-ticks li {
  flex: 1 1 0;
  min-width: 2px;
  background: rgba(245, 247, 250, 0.18);
  border-radius: 1px;
}
.rail-ticks li:nth-child(1)  { height: 30%; }
.rail-ticks li:nth-child(2)  { height: 52%; }
.rail-ticks li:nth-child(3)  { height: 38%; }
.rail-ticks li:nth-child(4)  { height: 74%; }
.rail-ticks li:nth-child(5)  { height: 44%; }
.rail-ticks li:nth-child(6)  { height: 88%; }
.rail-ticks li:nth-child(7)  { height: 36%; }
.rail-ticks li:nth-child(8)  { height: 64%; }
.rail-ticks li:nth-child(9)  { height: 48%; }
.rail-ticks li:nth-child(10) { height: 80%; }
.rail-ticks li:nth-child(11) { height: 40%; }
.rail-ticks li:nth-child(12) { height: 58%; background: var(--neon); }

.header-rail__readout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.header-rail__item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.header-rail__item .num { color: var(--neon); font-weight: 600; }

.header-rail__sep { color: rgba(245, 247, 250, 0.24); }

.status-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  animation: dotPulse 1.6s var(--ease) infinite;
}

/* 桌面端：头部转为左侧常驻导航柱 -------------------------------------- */
@media (min-width: 960px) {
  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--frame-w);
    border-bottom: 0;
    border-right: 1px solid var(--hair-dark);
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .header-frame {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
  }

  .header-top { border-bottom: 1px solid var(--hair-dark); }

  .brand {
    flex-direction: row;
    align-items: center;
    padding: 22px var(--pad);
  }

  .nav-toggle { display: none; }

  .site-nav {
    display: block;
    order: 2;
    flex: 1 1 auto;
    overflow-y: auto;
    border-bottom: 0;
  }

  .site-nav__title { padding-top: 20px; }

  .header-rail {
    order: 3;
    margin-top: auto;
    padding: 16px var(--pad) 22px;
  }

  .rail-ticks { height: 26px; margin-bottom: 12px; }
}

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--space);
  color: rgba(245, 247, 250, 0.72);
  border-top: 1px solid var(--hair-dark);
}

.footer-frame {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.footer-tier {
  padding: clamp(26px, 4.5vw, 50px) 0;
  border-bottom: 1px solid var(--hair-dark);
}
.footer-tier:last-child { border-bottom: 0; }

.footer-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-links {
  display: grid;
  gap: 4px 28px;
  margin-top: 14px;
}
.footer-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 15.5px;
  font-weight: 600;
  color: rgba(245, 247, 250, 0.78);
  transition: color 0.2s var(--ease);
}
.footer-links a::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--blue);
  transition: background-color 0.2s var(--ease);
}
.footer-links a:hover,
.footer-links a:focus-visible { color: #FFFFFF; }
.footer-links a:hover::before,
.footer-links a:focus-visible::before { background: var(--neon); }

.footer-brand-block { margin-bottom: 18px; }

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: #FFFFFF;
}
.footer-brand::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
}

.footer-note {
  max-width: 38ch;
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--muted);
}

.footer-contact { display: grid; gap: 10px; }
.footer-contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  font-size: 14.5px;
}

.footer-key {
  flex: none;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-val { color: rgba(245, 247, 250, 0.88); word-break: break-all; }
.footer-val.num { font-family: var(--font-mono); color: var(--neon); }

.footer-tier--legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 30px;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}
.footer-legal-links a {
  font-size: 13.5px;
  color: rgba(245, 247, 250, 0.66);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

@media (min-width: 760px) {
  .footer-tier--index {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 20px 32px;
    align-items: start;
  }
  .footer-links {
    margin-top: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-tier--brand {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: 24px 40px;
    align-items: start;
  }
  .footer-brand-block { margin-bottom: 0; }
}

/* --------------------------------------------------------------------------
   通用容器与排版
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.section { padding: clamp(42px, 6.5vw, 92px) 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  flex: none;
  width: 22px;
  height: 1px;
  background: var(--blue);
}

.num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--hair);
}

.link-u {
  position: relative;
  color: inherit;
}
.link-u::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s var(--ease);
}
.link-u:hover::after,
.link-u:focus-visible::after { transform: scaleX(1); }

.prose { max-width: 66ch; }
.prose h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin: 1.9em 0 0.6em;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-size: 1.2rem;
  margin: 1.6em 0 0.5em;
}
.prose p { margin: 0 0 1.1em; color: #232A34; }
.prose ul { margin: 0 0 1.2em; }
.prose li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 0.5em;
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--blue);
}

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn--primary { background: var(--blue); color: #FFFFFF; }
.btn--primary:hover,
.btn--primary:focus-visible { background: var(--blue-deep); transform: translateY(-2px); }

.btn--neon { background: var(--neon); color: var(--ink); }
.btn--neon:hover,
.btn--neon:focus-visible { background: #00C765; transform: translateY(-2px); }

.btn--ghost {
  background: transparent;
  border-color: rgba(11, 14, 20, 0.24);
  color: var(--ink);
}
.btn--ghost:hover,
.btn--ghost:focus-visible { border-color: var(--blue); color: var(--blue); }

.btn--line {
  background: transparent;
  border-color: rgba(245, 247, 250, 0.3);
  color: #FFFFFF;
}
.btn--line:hover,
.btn--line:focus-visible { border-color: var(--neon); color: var(--neon); }

/* --------------------------------------------------------------------------
   资料卡 / 标签 / 数据块
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  padding: 22px;
  background: #FFFFFF;
  border: 1px solid var(--hair);
  border-radius: 2px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}
.card:hover,
.card:focus-within {
  border-color: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(11, 14, 20, 0.07);
}

.card--dark {
  background: var(--space);
  border-color: var(--hair-dark);
  color: var(--paper);
}

.card--glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.card__id {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.card--dark .card__id { color: rgba(245, 247, 250, 0.5); }

.card__title {
  margin: 8px 0 6px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--mist);
  color: var(--blue-deep);
  border-radius: 2px;
}
.tag--live { background: var(--green-mist); color: #046B3B; }
.tag--alert { background: rgba(255, 107, 53, 0.14); color: #B33F14; }

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat__value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.stat__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   面包屑
   -------------------------------------------------------------------------- */
.breadcrumb {
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: "/";
  color: rgba(11, 14, 20, 0.24);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--blue); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* --------------------------------------------------------------------------
   图片容器（供页面阶段放置运动瞬间与数据可视化）
   -------------------------------------------------------------------------- */
.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, var(--steel) 0%, #05070B 100%);
  border-radius: 2px;
}
.media > img,
.media > picture > img,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--3x2  { aspect-ratio: 3 / 2; }
.media--4x3  { aspect-ratio: 4 / 3; }
.media--1x1  { aspect-ratio: 1 / 1; }
.media--3x4  { aspect-ratio: 3 / 4; }

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 14, 20, 0) 42%, rgba(11, 14, 20, 0.72) 100%);
  pointer-events: none;
}

.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  margin: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--paper);
}

/* --------------------------------------------------------------------------
   网格与分屏
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.split {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

@media (min-width: 900px) {
  .split { grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); }
  .split--flip { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); }
}

@media (max-width: 900px) {
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* --------------------------------------------------------------------------
   减少动态效果
   -------------------------------------------------------------------------- */
@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;
    scroll-behavior: auto !important;
  }
  .card:hover,
  .card:focus-within { transform: none; }
  .btn:hover,
  .btn:focus-visible { transform: none; }
}