/* ============================================================
   博万体育主站 · 共享样式 /assets/site.css
   技术蓝图网格 · 侧边轨道导航 · 夜间赛场配色
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
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 { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-950: #0A1512;
  --ink-900: #0F1C18;
  --ink-800: #12211C;
  --moss: #1D3129;
  --line: #33463F;
  --line-soft: rgba(51, 70, 63, .55);
  --stone: #96A39B;
  --bone: #EDE9DC;
  --cyan: #2FE3CE;
  --amber: #E9A23B;
  --red: #E8473C;
  --yellow: #F3D53C;

  --rail-w: 0px;
  --strip-h: 0px;

  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, .5);
  --shadow-soft: 3px 3px 0 rgba(0, 0, 0, .45);

  --font-head: "Barlow Semi Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --measure: min(1180px, 100% - 36px);
}

/* ---------- 3. 基础排版与画布 ---------- */
html { scroll-padding-top: calc(var(--strip-h) + 24px); }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--bone);
  background-color: var(--ink-950);
  background-image:
    linear-gradient(rgba(51, 70, 63, .28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(51, 70, 63, .28) 1px, transparent 1px);
  background-size: 72px 72px;
  padding-left: var(--rail-w);
  padding-top: var(--strip-h);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; letter-spacing: .01em; line-height: 1.16; }
h1 { font-size: clamp(32px, 5vw, 44px); }
h2 { font-size: clamp(24px, 3.4vw, 32px); }
h3 { font-size: clamp(18px, 2.2vw, 22px); }
strong { color: var(--bone); }
code, kbd, samp, pre { font-family: var(--font-mono); }

a { text-decoration-color: var(--line); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--cyan); }

::selection { background: var(--cyan); color: var(--ink-950); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(10, 21, 18, .85);
}

#main-content { outline: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 4. 通用布局 ---------- */
.container { width: var(--measure); margin-inline: auto; }
.section { padding-block: clamp(48px, 7vw, 92px); }
.section--tight { padding-block: clamp(32px, 4vw, 56px); }
.section--moss { background: var(--moss); }
.section--ink { background: var(--ink-900); }
.section--bone { background: var(--bone); color: var(--ink-950); }
.section--bone h1, .section--bone h2, .section--bone h3 { color: var(--ink-950); }

.stack > * + * { margin-top: var(--stack-gap, 16px); }
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.grid--split { grid-template-columns: 1fr; }
@media (min-width: 900px) { .grid--split { grid-template-columns: 1.35fr .65fr; } }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ---------- 5. 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 20px;
  border: 2px solid var(--line);
  background: var(--moss);
  color: var(--bone);
  font-family: var(--font-head);
  font-size: 15px; font-weight: 700; letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, color .18s ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-soft); }
.btn--primary { background: var(--cyan); color: var(--ink-950); border-color: var(--ink-950); box-shadow: var(--shadow-soft); }
.btn--primary:hover { box-shadow: var(--shadow-hard); }
.btn--amber { background: var(--amber); color: var(--ink-950); border-color: var(--ink-950); box-shadow: var(--shadow-soft); }
.btn--ghost { background: transparent; color: var(--bone); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 6. 面包屑 / 说明牌 / 标签 / 表格 ---------- */
.breadcrumb { font-family: var(--font-mono); font-size: 12px; color: var(--stone); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line); margin-right: 8px; }
.breadcrumb a { color: var(--stone); text-decoration: none; }
.breadcrumb a:hover { color: var(--cyan); }

.plate {
  border: 2px solid var(--line);
  background: var(--ink-800);
  padding: 14px 16px;
  box-shadow: var(--shadow-hard);
}
.plate__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: .08em;
  color: var(--stone);
  margin-bottom: 6px;
}
.plate__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px; line-height: 1.2;
  color: var(--bone);
  letter-spacing: .02em;
}

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: .08em;
  padding: 4px 8px;
  border: 1px solid var(--line);
  color: var(--stone);
  white-space: nowrap;
}
.tag--cyan { color: var(--cyan); border-color: var(--cyan); }
.tag--amber { color: var(--amber); border-color: var(--amber); }
.tag--red { background: var(--red); color: var(--ink-950); border-color: var(--ink-950); }
.tag--yellow { background: var(--yellow); color: var(--ink-950); border-color: var(--ink-950); }

.data-table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.5; }
.data-table caption { text-align: left; font-family: var(--font-mono); font-size: 12px; color: var(--stone); padding-bottom: 10px; }
.data-table th {
  text-align: left;
  font-family: var(--font-head);
  font-size: 12px; letter-spacing: .08em; font-weight: 700;
  color: var(--stone);
  padding: 10px 12px;
  border-bottom: 2px solid var(--line);
}
.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--line-soft); font-variant-numeric: tabular-nums; }
.data-table tbody tr:nth-child(odd) { background: rgba(29, 49, 41, .5); }

/* ---------- 7. 横向卡片带 / 图片容器 ---------- */
.band {
  display: flex; gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 6px 0 22px;
  -webkit-overflow-scrolling: touch;
}
.band__item { flex: 0 0 min(320px, 78vw); scroll-snap-align: start; }
.band::-webkit-scrollbar { height: 6px; }
.band::-webkit-scrollbar-track { background: var(--ink-800); }
.band::-webkit-scrollbar-thumb { background: var(--line); }

.media {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line);
  background-color: var(--moss);
  background-image:
    linear-gradient(rgba(51, 70, 63, .5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(51, 70, 63, .5) 1px, transparent 1px);
  background-size: 38px 38px;
}
.media img, .media video { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media__cap {
  position: absolute; inset: auto 0 0 0;
  padding: 8px 10px;
  background: rgba(10, 21, 18, .82);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: .06em;
  color: var(--stone);
}

/* ---------- 8. 主题筛选 ---------- */
.theme-filter { display: flex; flex-wrap: wrap; gap: 8px; }
.theme-filter__btn {
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: .08em;
  padding: 8px 13px;
  background: transparent;
  color: var(--stone);
  border: 2px solid var(--line);
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}
.theme-filter__btn:hover { color: var(--bone); border-color: var(--stone); }
.theme-filter__btn[aria-pressed="true"] {
  background: var(--cyan); color: var(--ink-950); border-color: var(--ink-950);
}
.empty-note {
  border: 2px dashed var(--line);
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--stone);
}

@keyframes filterIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.is-filter-in { animation: filterIn .24s ease both; animation-delay: calc(var(--i, 0) * 80ms); }

/* ---------- 9. 显现 ---------- */
html.js [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .45s ease, transform .45s ease; }
html.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 10. 页头：跳转链接 ---------- */
.skip-link {
  position: fixed; top: -120px; left: 10px; z-index: 200;
  padding: 10px 16px;
  background: var(--cyan); color: var(--ink-950);
  font-family: var(--font-head); font-weight: 700; text-decoration: none;
  border: 2px solid var(--ink-950);
  transition: top .18s ease;
}
.skip-link:focus { top: 10px; }

/* ---------- 11. 页头：移动端骨架 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink-800);
}

.rail { display: flex; align-items: center; }

.rail__top {
  position: relative; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 10px 14px;
  background: var(--ink-800);
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--bone); }
.brand__mark {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  flex: 0 0 auto;
  background: var(--cyan); color: var(--ink-950);
  font-family: var(--font-mono); font-weight: 700; font-size: 14px; letter-spacing: .04em;
  border: 2px solid var(--ink-950);
  box-shadow: var(--shadow-soft);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand__name { font-family: var(--font-head); font-weight: 700; font-size: 16px; letter-spacing: .02em; }
.brand__domain { font-family: var(--font-mono); font-size: 10px; color: var(--stone); letter-spacing: .02em; }

.nav-toggle {
  display: inline-flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px 10px;
  background: transparent;
  border: 2px solid var(--line);
  color: var(--bone);
  cursor: pointer;
}
.nav-toggle__bar { display: block; width: 20px; height: 2px; background: var(--cyan); }
.nav-toggle__text { font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; color: var(--stone); }
.nav-toggle[aria-expanded="true"] { border-color: var(--cyan); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle__bar { transition: transform .2s ease, opacity .2s ease; }

/* ---------- 12. 页头：导航（移动抽屉） ---------- */
.rail-nav {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 4;
  width: min(320px, 86vw);
  padding: 122px 18px 26px;
  background: var(--ink-800);
  border-right: 2px solid var(--line);
  overflow-y: auto;
  transform: translateX(-104%);
  transition: transform .24s ease;
}
.rail-nav[data-open] { transform: none; }

.rail-nav__list { display: flex; flex-direction: column; gap: 2px; min-height: 100%; }
.rail-nav__link {
  display: flex; flex-direction: column; gap: 2px;
  padding: 12px 14px;
  border-left: 3px solid transparent;
  color: var(--stone);
  text-decoration: none;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease;
}
.rail-nav__link:hover { color: var(--bone); background: var(--moss); }
.rail-nav__link[aria-current="page"] { color: var(--bone); background: var(--moss); border-left-color: var(--cyan); }
.rail-nav__index { font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; color: var(--line); }
.rail-nav__link:hover .rail-nav__index,
.rail-nav__link[aria-current="page"] .rail-nav__index { color: var(--cyan); }
.rail-nav__label { font-family: var(--font-head); font-size: 16px; font-weight: 700; letter-spacing: .02em; }

.rail-nav__item--cta { margin-top: auto; padding-top: 18px; }
.rail-nav__cta {
  display: block;
  padding: 12px 10px;
  background: var(--amber); color: var(--ink-950);
  font-family: var(--font-head); font-weight: 700; font-size: 14px; letter-spacing: .02em;
  text-align: center; text-decoration: none;
  border: 2px solid var(--ink-950);
  box-shadow: var(--shadow-soft);
}
.rail-nav__cta:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard); }

.nav-scrim { position: fixed; inset: 0; z-index: 3; background: rgba(10, 21, 18, .76); }

/* ---------- 13. 页头：滚动进度 ---------- */
.rail__progress {
  position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: rgba(51, 70, 63, .6);
}
.rail__progress-bar {
  display: block; height: 100%; width: calc(var(--progress, 0) * 1%);
  background: linear-gradient(90deg, var(--cyan), var(--amber));
}

/* ---------- 14. 页头：版本切换条 ---------- */
.version-bar {
  position: relative; z-index: 5;
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 8px 12px;
  padding: 9px 14px 11px;
  background: var(--ink-900);
  border-bottom: 2px solid var(--line);
  font-family: var(--font-mono);
}
.version-bar__label {
  font-size: 11px; letter-spacing: .08em; color: var(--stone);
  display: inline-flex; align-items: center; gap: 6px;
}
.version-bar__label::before { content: ""; width: 6px; height: 6px; background: var(--cyan); }
.version-switch { display: inline-flex; border: 2px solid var(--line); background: var(--ink-950); }
.version-switch__btn {
  padding: 4px 11px;
  background: transparent;
  border: 0; border-right: 1px solid var(--line);
  color: var(--stone);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}
.version-switch__btn:last-child { border-right: 0; }
.version-switch__btn:hover { color: var(--bone); }
.version-switch__btn[aria-pressed="true"],
.version-switch__btn.is-active { background: var(--cyan); color: var(--ink-950); font-weight: 700; }
.version-bar__readout { font-size: 12px; color: var(--stone); letter-spacing: .02em; }
.version-bar__quick {
  font-size: 12px; letter-spacing: .04em;
  color: var(--cyan);
  border: 1px solid var(--cyan);
  padding: 3px 10px;
  text-decoration: none;
}
.version-bar__quick:hover { background: var(--cyan); color: var(--ink-950); }

/* ---------- 15. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--ink-900);
  border-top: 2px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 6px;
  background: linear-gradient(90deg, var(--cyan) 0 16%, var(--amber) 16% 28%, var(--line) 28% 100%);
}
.footer-inner { width: var(--measure); margin-inline: auto; padding-block: clamp(36px, 5vw, 60px) 0; }

.footer-grid { display: grid; gap: 30px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 1.1fr 1fr 1.3fr; } }

.footer-brand__mark {
  display: grid; place-items: center;
  width: 42px; height: 42px;
  background: var(--cyan); color: var(--ink-950);
  font-family: var(--font-mono); font-weight: 700;
  border: 2px solid var(--ink-950);
  box-shadow: var(--shadow-soft);
  margin-bottom: 12px;
}
.footer-brand__name { font-family: var(--font-head); font-weight: 700; font-size: 20px; }
.footer-brand__line { color: var(--stone); font-size: 14px; margin-top: 4px; }
.footer-brand__domain {
  font-family: var(--font-mono); font-size: 12px; color: var(--line);
  margin-top: 10px; letter-spacing: .04em;
}

.footer-nav__title {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--cyan);
  padding-bottom: 10px; margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.footer-nav__list { display: flex; flex-direction: column; gap: 9px; }
.footer-nav__link {
  font-size: 15px; color: var(--stone); text-decoration: none;
  border-left: 2px solid transparent; padding-left: 0;
  transition: color .18s ease, padding-left .18s ease, border-color .18s ease;
}
.footer-nav__link:hover { color: var(--bone); border-left-color: var(--cyan); padding-left: 8px; }

.footer-contact__line { font-size: 14px; color: var(--stone); margin-bottom: 9px; line-height: 1.55; }
.footer-contact__strong { font-family: var(--font-mono); color: var(--bone); letter-spacing: .02em; }

.footer-base {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px 24px;
  margin-top: 40px;
  padding: 18px 0 28px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em;
  color: var(--stone);
}

/* ---------- 16. 桌面端：固定轨道导航 ---------- */
@media (min-width: 1024px) {
  :root { --rail-w: 112px; --strip-h: 46px; }

  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    border-right: 2px solid var(--line);
    background: var(--ink-800);
  }
  .rail { flex: 1 1 auto; display: flex; flex-direction: column; min-height: 0; }

  .rail__top { flex-direction: column; gap: 0; padding: 14px 8px; border-bottom: 1px solid var(--line); }
  .brand { flex-direction: column; gap: 8px; text-align: center; }
  .brand__mark { width: 44px; height: 44px; font-size: 15px; }
  .brand__name { font-size: 11px; line-height: 1.3; }
  .brand__domain { font-size: 8px; letter-spacing: 0; }
  .nav-toggle { display: none; }

  .rail-nav {
    position: static;
    z-index: auto;
    flex: 1 1 auto;
    width: auto;
    min-height: 0;
    padding: 0;
    background: transparent;
    border-right: 0;
    transform: none;
    overflow-y: auto;
    transition: none;
  }
  .rail-nav__list { padding: 10px 8px 12px; }
  .rail-nav__link { padding: 8px 8px; gap: 1px; border-left-width: 2px; }
  .rail-nav__label { font-size: 13px; letter-spacing: 0; }
  .rail-nav__cta { font-size: 12px; padding: 10px 6px; }

  .nav-scrim { display: none !important; }

  .rail__progress {
    left: auto; right: -2px; top: 0; bottom: 0;
    width: 2px; height: auto;
  }
  .rail__progress-bar { width: 100%; height: calc(var(--progress, 0) * 1%); background: linear-gradient(180deg, var(--cyan), var(--amber)); }

  .version-bar {
    position: fixed;
    top: 0; left: var(--rail-w); right: 0;
    height: var(--strip-h);
    flex-wrap: nowrap;
    padding: 0 20px;
    gap: 16px;
  }
  .version-bar__readout { flex: 1 1 auto; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .version-bar__quick { margin-left: auto; }
}

/* ---------- 17. 动效降级 / 无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  html.js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .is-filter-in { animation: none; }
  .rail-nav { transition: none; }
}