/* ============================================================
   B体育 · 夜间数据竞技场
   共享样式表 /assets/site.css
   负责：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件 / 响应式
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; }

table { border-collapse: collapse; border-spacing: 0; }

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

hr { border: 0; border-top: 1px solid var(--grid); }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩体系 */
  --ink: #06110D;
  --ink-2: #0C1F17;
  --grid: #122E22;
  --lime: #C8FF3D;
  --lime-soft: #E8FFB0;
  --orange: #FF7A2F;
  --silver: #C6CDD3;
  --white: #F2F6F3;
  --mist: #8FA79C;
  --deep: #1F5B44;
  --ice: #4FC3F7;

  /* 尺寸系统 */
  --rail-w: 96px;
  --bar-h: 58px;
  --maxw: 1320px;
  --gap: 24px;
  --pad-x: 40px;
  --pad-x-sm: 20px;

  /* 字体系统 */
  --font-display: "Archivo Narrow", "Arial Narrow", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: ui-monospace, SFMono-Regular, Menlo, Consolas, "Roboto Mono", "Courier New", monospace;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  color: var(--white);
  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;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--white);
}

h1 { font-size: clamp(34px, 4.2vw, 60px); }
h2 { font-size: clamp(26px, 3vw, 40px); }
h3 { font-size: clamp(20px, 2vw, 26px); }
h4 { font-size: clamp(17px, 1.4vw, 20px); }

p { overflow-wrap: anywhere; }

strong, b { font-weight: 700; color: var(--lime-soft); }

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

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

/* ---------- 4. 无障碍隐藏 / 跳转链接 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 11px 18px;
  background: var(--lime);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transform: translateY(-240%);
  transition: transform 0.18s ease;
}

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

/* ---------- 5. 布局容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.shell--wide { max-width: 1520px; }

.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

/* ---------- 6. 通用文本与装饰组件 ---------- */
.mono {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
}

.display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.display--xl { font-size: clamp(56px, 12vw, 160px); }
.display--lg { font-size: clamp(42px, 7.5vw, 104px); }
.display--md { font-size: clamp(30px, 4.4vw, 62px); }

.rule {
  width: 100%;
  height: 1px;
  border: 0;
  background: var(--grid);
}

.rule--lime { background: var(--lime); height: 2px; }

.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 20px;
  row-gap: 8px;
  align-items: baseline;
  margin: 0 0 36px;
}

.section-head__num {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.section-head__title { grid-column: 2; }

.section-head__lead {
  grid-column: 2;
  max-width: 56ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 7. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

.btn--lime:hover { background: var(--lime-soft); color: var(--ink); }

.btn--ghost {
  background: transparent;
  border-color: var(--deep);
  color: var(--white);
}

.btn--ghost:hover { border-color: var(--lime); color: var(--lime); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--deep);
  background: rgba(31, 91, 68, 0.25);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.tag--orange { color: var(--orange); border-color: rgba(255, 122, 47, 0.42); background: rgba(255, 122, 47, 0.08); }
.tag--ice { color: var(--ice); border-color: rgba(79, 195, 247, 0.38); background: rgba(79, 195, 247, 0.07); }

/* ---------- 8. 面包屑 ---------- */
.crumbs {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

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

.crumbs li + li::before {
  content: "/";
  color: var(--grid);
}

.crumbs a {
  color: var(--mist);
  border-bottom: 1px solid var(--grid);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.crumbs a:hover { color: var(--lime); border-color: var(--lime); }

/* ---------- 9. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--white);
}

.prose p { margin: 0 0 1.2em; }

.prose h2 { margin: 2em 0 0.6em; }
.prose h3 { margin: 1.8em 0 0.5em; }

.prose ul, .prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}

.prose ul li { list-style: none; position: relative; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: -1.1em;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--lime);
}

.prose ol { list-style: decimal; }
.prose ol li::marker { color: var(--lime); font-family: var(--font-data); }

.prose a {
  color: var(--lime);
  border-bottom: 1px solid var(--deep);
}

.prose a:hover { border-color: var(--lime); }

/* ---------- 10. 图片容器（供页面阶段放置影像） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--grid);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(rgba(200, 255, 61, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 255, 61, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

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

.media--tall { aspect-ratio: 4 / 5; }
.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 11. 数据表 ---------- */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  font-size: 14px;
  color: var(--white);
}

.data-table caption {
  padding-bottom: 12px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.data-table th {
  padding: 11px 14px;
  text-align: left;
  white-space: nowrap;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--mist);
  border-bottom: 1px solid var(--deep);
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--grid);
  font-variant-numeric: tabular-nums;
}

.data-table tbody tr:nth-child(even) { background: var(--grid); }

.data-table .num {
  font-family: var(--font-data);
  text-align: right;
  color: var(--lime-soft);
}

/* ---------- 12. 页头 · 侧边轨道导航 ---------- */
.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 120;
  display: flex;
  flex-direction: column;
  width: var(--rail-w);
  background: var(--ink-2);
  border-right: 1px solid var(--grid);
}

.rail__progress {
  position: absolute;
  top: 0;
  right: -1px;
  width: 2px;
  height: 100%;
  background: var(--lime);
  transform: scaleY(0);
  transform-origin: top center;
  pointer-events: none;
}

.rail__bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px 8px 16px;
  border-bottom: 1px solid var(--grid);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  text-align: center;
}

.brand__mark {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.brand__accent { color: var(--lime); }

.brand__sub {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.rail__toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--grid);
  border-radius: 0;
  color: var(--white);
  font-size: 12px;
  letter-spacing: 0.12em;
  cursor: pointer;
}

.rail__toggle-icon {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.rail__toggle-icon::before,
.rail__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.22s ease;
}

.rail__toggle-icon::before { top: 0; }
.rail__toggle-icon::after { bottom: 0; }

.rail__toggle[aria-expanded="true"] .rail__toggle-icon::before { transform: translateY(4.25px) rotate(45deg); }
.rail__toggle[aria-expanded="true"] .rail__toggle-icon::after { transform: translateY(-4.25px) rotate(-45deg); }

.rail__nav {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  padding: 16px 6px 10px;
}

.rail__caption {
  margin: 0 0 12px;
  text-align: center;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 11px 5px;
  text-align: center;
  color: var(--mist);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.rail__num {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--silver);
  transition: color 0.18s ease;
}

.rail__text {
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.rail__link:hover {
  color: var(--white);
  background: var(--grid);
}

.rail__link[aria-current="page"] {
  color: var(--lime);
  background: rgba(31, 91, 68, 0.5);
}

.rail__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--lime);
}

.rail__link[aria-current="page"] .rail__num { color: var(--lime); }

.rail__seasons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin: 18px 0 0;
  padding: 14px 4px 4px;
  border-top: 1px solid var(--grid);
  text-align: center;
}

.rail__seasons-label {
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.rail__seasons-value {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--silver);
}

.rail__foot {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 8px 18px;
  border-top: 1px solid var(--grid);
}

.rail__cta {
  display: block;
  padding: 10px 4px;
  text-align: center;
  background: var(--lime);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: background-color 0.18s ease;
}

.rail__cta:hover { background: var(--lime-soft); }

.rail__top {
  padding: 9px 4px;
  border: 1px solid var(--grid);
  border-radius: 0;
  color: var(--mist);
  font-size: 11px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.rail__top:hover { color: var(--lime); border-color: var(--lime); }

/* 移动端浮动返回顶部 */
.to-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 110;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--ink-2);
  border: 1px solid var(--deep);
  color: var(--lime);
  font-family: var(--font-data);
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, border-color 0.18s ease;
}

.to-top[data-visible] { opacity: 1; visibility: visible; }
.to-top:hover { border-color: var(--lime); }

/* ---------- 13. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: 110px;
  padding: 62px 0 28px;
  background: var(--ink-2);
  border-top: 1px solid var(--grid);
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(32%, 380px);
  height: 3px;
  background: var(--lime);
}

.site-foot__grid {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: 1.4fr 0.85fr 1.2fr 0.85fr;
  gap: 40px 36px;
}

.foot-col { display: flex; flex-direction: column; gap: 14px; }

.foot-col__title {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
}

.foot-brand {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.foot-tagline {
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.foot-seasons {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.foot-seasons .mono { color: var(--lime); }

.foot-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 14px;
  color: var(--mist);
}

.foot-list a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.foot-list a:hover { color: var(--lime); border-color: var(--lime); }

.foot-list--plain { gap: 12px; line-height: 1.6; }

.foot-mono {
  display: block;
  margin-top: 2px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--white);
  word-break: break-all;
}

.site-foot__base {
  width: 100%;
  max-width: var(--maxw);
  margin: 54px auto 0;
  padding: 18px var(--pad-x) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 30px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.foot-icp { color: var(--silver); }

.foot-copy { margin-left: auto; }

/* ---------- 14. 响应式 · 平板 ---------- */
@media (max-width: 1180px) {
  .site-foot__grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .foot-col--brand { grid-column: 1 / -1; }
}

/* ---------- 15. 响应式 · 移动端与抽屉导航 ---------- */
@media (max-width: 900px) {
  body { padding-top: var(--bar-h); }

  .rail {
    top: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--bar-h);
    flex-direction: row;
    border-right: 0;
    border-bottom: 1px solid var(--grid);
  }

  .rail__progress { display: none; }

  .rail__bar {
    flex: 1 1 auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-bottom: 0;
  }

  .brand { flex-direction: row; align-items: baseline; gap: 8px; }
  .brand__mark { font-size: 19px; }
  .brand__sub { font-size: 10px; }

  .rail__toggle { display: inline-flex; }

  .rail__nav {
    position: fixed;
    top: var(--bar-h);
    left: 0;
    right: 0;
    flex: 0 0 auto;
    max-height: calc(100vh - var(--bar-h));
    padding: 18px 16px 26px;
    background: var(--ink-2);
    border-bottom: 1px solid var(--deep);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease;
  }

  .rail__nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .rail__caption { text-align: left; margin-bottom: 10px; }

  .rail__list { gap: 0; }

  .rail__link {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 14px 12px;
    text-align: left;
    border-bottom: 1px solid var(--grid);
  }

  .rail__text { font-size: 15px; }
  .rail__num { font-size: 11px; }

  .rail__link[aria-current="page"]::before { width: 3px; }

  .rail__seasons {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    margin-top: 18px;
    padding: 14px 12px 0;
    text-align: left;
  }

  .rail__foot { display: none; }

  .site-foot { margin-top: 72px; padding: 46px 0 24px; }

  .site-foot__grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 0 var(--pad-x-sm);
  }

  .site-foot__base {
    margin-top: 38px;
    padding: 16px var(--pad-x-sm) 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .foot-copy { margin-left: 0; }

  .shell { padding: 0 var(--pad-x-sm); }

  .grid12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .section-head { column-gap: 14px; margin-bottom: 26px; }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  .display--xl { font-size: clamp(44px, 16vw, 72px); }
  .site-foot__grid { gap: 28px; }
}

/* ---------- 16. 桌面端为固定轨道让出安全区 ---------- */
@media (min-width: 901px) {
  body { padding-left: var(--rail-w); }
}

/* ---------- 17. 动效偏好 ---------- */
@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;
  }
}