/* ============================================================
   /assets/site.css — 9博体育赛场 共享层
   1 reset · 2 tokens · 3 typography · 4 header · 5 footer
   6 components · 7 responsive · 8 a11y
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
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%; }

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

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

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

/* ---------- 2. tokens ---------- */
:root {
  --ink: #0B0F0E;
  --ink-deep: #07100C;
  --green: #0F2A22;
  --green-row: #12352B;
  --white: #F2F6F4;
  --grey-blue: #C9D6D9;
  --lime: #C8FF3D;
  --orange: #FF6A2A;
  --fog: #7C8A86;
  --line: #2A3B35;

  --announce-h: 40px;
  --rail: 244px;
  --railx: 224px;
  --gutter: clamp(18px, 4vw, 56px);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "Roboto Mono", "Courier New", monospace;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- 3. base type ---------- */
body {
  margin: 0;
  padding-top: var(--announce-h);
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content { outline: none; }

h1, h2, h3, h4 { font-weight: 300; line-height: 1.08; letter-spacing: -.02em; }

p { overflow-wrap: break-word; }

.display {
  font-family: var(--font-display);
  font-size: clamp(56px, 12vw, 160px);
  font-weight: 300;
  line-height: .88;
  letter-spacing: -.05em;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 72px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--white);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--fog);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--lime);
  flex: none;
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.7;
  color: var(--grey-blue);
  max-width: 62ch;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.prose {
  max-width: 72ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--grey-blue);
}

.prose p + p { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  margin-top: 1.8em;
  margin-bottom: .6em;
  color: var(--white);
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -.02em;
}

.prose ul { margin-top: .8em; }

.prose li {
  position: relative;
  padding-left: 18px;
  margin-bottom: .5em;
  color: var(--grey-blue);
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .8em;
  width: 6px;
  height: 1px;
  background: var(--lime);
}

/* ---------- 4. header ---------- */
.site-header { position: relative; z-index: 120; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 400;
  transform: translateY(-180%);
  background: var(--lime);
  color: var(--ink);
  padding: 10px 16px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: transform .2s var(--ease);
}

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

.announce {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--announce-h);
  z-index: 210;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 var(--gutter);
  background: var(--green);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--grey-blue);
}

.announce__dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(200, 255, 61, .14);
}

.announce__text {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-frame {
  position: relative;
  z-index: 150;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  padding: 14px var(--gutter);
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-right: auto;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.brand__mark {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--white);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lime);
}

.brand__note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--fog);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(15, 42, 34, .65);
  color: var(--white);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

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

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 9px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform .25s var(--ease), top .25s var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { top: 7.5px; }

.nav-toggle[aria-expanded="true"] { border-color: var(--lime); color: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 3.75px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 3.75px; transform: rotate(-45deg); }

.nav-rail {
  flex: 1 1 100%;
  width: 100%;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  border-top: 1px solid transparent;
  transition: max-height .35s var(--ease), opacity .25s var(--ease), border-color .25s var(--ease);
}

.nav-rail[data-open] {
  max-height: 70vh;
  overflow-y: auto;
  opacity: 1;
  border-top-color: var(--line);
  padding-top: 14px;
}

.nav-rail__title {
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .26em;
  color: var(--fog);
}

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

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--grey-blue);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.nav-link:hover { color: var(--white); padding-left: 6px; }

.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--fog);
  transition: color .2s var(--ease);
}

.nav-link__label { letter-spacing: .02em; }

.nav-link:hover .nav-link__idx { color: var(--lime); }

.nav-link[aria-current="page"] { color: var(--lime); }
.nav-link[aria-current="page"] .nav-link__label { font-weight: 600; }
.nav-link[aria-current="page"] .nav-link__idx { color: var(--lime); }

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 2px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  transform: translateY(-50%);
}

.nav-rail__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0 4px;
}

.nav-mini {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--grey-blue);
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.nav-mini:hover {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(200, 255, 61, .07);
}

.data-rail {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  padding: 16px var(--gutter) 18px;
  background: var(--green);
  border-bottom: 1px solid var(--line);
}

.data-rail__title {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .24em;
  color: var(--lime);
}

.data-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.data-stat__k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--fog);
}

.data-stat__v {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--white);
  letter-spacing: .01em;
}

.data-rail__links {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 4px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 300;
  background: rgba(242, 246, 244, .08);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

/* ---------- 5. footer ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--green);
  border-top: 1px solid var(--line);
  color: var(--grey-blue);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  padding: clamp(34px, 6vw, 72px) var(--gutter) 0;
}

.footer-brand { max-width: 420px; }

.footer-brand__mark {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--white);
}

.footer-brand__sub {
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--lime);
}

.footer-tagline {
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--grey-blue);
  max-width: 34ch;
}

.footer-cta { margin-top: 20px; }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 26px 24px;
}

.footer-col__title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--lime);
}

.footer-links { display: flex; flex-direction: column; gap: 8px; }

.footer-link {
  font-size: 14px;
  color: var(--grey-blue);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.footer-link:hover { color: var(--white); padding-left: 5px; }

.footer-contact {
  display: grid;
  gap: 8px;
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(22px, 4vw, 36px) var(--gutter);
  border-top: 1px solid var(--line);
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  font-size: 13.5px;
}

.footer-contact__label {
  flex: none;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--fog);
}

.footer-contact__value { color: var(--white); overflow-wrap: break-word; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--fog);
}

.footer-copy { color: var(--grey-blue); }

.footer-icp { color: var(--fog); }

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-legal-links a { color: var(--fog); transition: color .2s var(--ease); }
.footer-legal-links a:hover { color: var(--lime); }

/* ---------- 6. shared page components ---------- */
.wrap {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 7vw, 96px); }

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

.panel {
  padding: clamp(18px, 2.6vw, 30px);
  background: var(--green);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 32px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .06em;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.btn--lime { background: var(--lime); color: var(--ink); }
.btn--lime:hover { background: #d9ff70; transform: translateY(-1px); }

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

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  line-height: 1.5;
}

.tag--lime { background: var(--lime); color: var(--ink); }
.tag--orange { background: var(--orange); color: var(--ink); }
.tag--quiet {
  border: 1px solid var(--line);
  background: rgba(201, 214, 217, .08);
  color: var(--grey-blue);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--fog);
}

.breadcrumbs a { color: var(--grey-blue); transition: color .2s var(--ease); }
.breadcrumbs a:hover { color: var(--lime); }

.breadcrumbs__sep { color: var(--line); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.data-table caption {
  caption-side: top;
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--fog);
}

.data-table th {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fog);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.data-table td {
  padding: 12px;
  color: var(--grey-blue);
  border-bottom: 1px solid var(--line);
  vertical-align: baseline;
}

.data-table tbody tr:nth-child(even) { background: var(--green-row); }
.data-table tbody tr:hover { background: rgba(200, 255, 61, .06); }
.data-table td strong,
.data-table td .mono { color: var(--white); }

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  border-radius: 3px;
  background:
    linear-gradient(135deg, var(--green) 0%, var(--ink-deep) 58%, #16382c 100%);
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(160deg, rgba(200, 255, 61, .08), transparent 52%),
    linear-gradient(0deg, rgba(11, 15, 14, .55), transparent 60%);
}

.media-frame__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--fog);
}

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 7. responsive ---------- */
@media (min-width: 720px) {
  .data-rail { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .data-rail__links { grid-column: 1 / -1; }
  .footer-top { grid-template-columns: minmax(0, .9fr) minmax(0, 1.4fr); }
}

@media (min-width: 1024px) {
  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* 桌面：导航成为页面左侧边框 */
@media (min-width: 1200px) {
  body { padding-left: var(--rail); }

  .header-frame {
    position: fixed;
    top: var(--announce-h);
    left: 0;
    bottom: 0;
    width: var(--rail);
    z-index: 150;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 0;
    padding: 24px 22px 28px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
    overflow-y: auto;
    background: var(--ink);
  }

  .brand-block { margin: 0 0 28px; }

  .nav-toggle { display: none; }

  .nav-rail {
    flex: 1 1 auto;
    max-height: none;
    overflow: visible;
    opacity: 1;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }

  .nav-rail[data-open] { padding-top: 18px; border-top-color: var(--line); }

  .data-rail { display: none; }

  .footer-top { padding-top: clamp(48px, 5vw, 76px); }
}

/* 宽桌面：右侧数据面板补齐框架 */
@media (min-width: 1400px) {
  body { padding-right: var(--railx); }

  .data-rail {
    position: fixed;
    top: var(--announce-h);
    right: 0;
    bottom: 0;
    z-index: 150;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 20px;
    width: var(--railx);
    padding: 24px 20px 28px;
    overflow-y: auto;
    background: var(--ink);
    border-left: 1px solid var(--line);
    border-bottom: 0;
  }

  .data-rail__title { padding-bottom: 2px; }

  .data-rail__links {
    flex-direction: column;
    align-items: flex-start;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--line);
  }

  .data-rail__links .nav-mini { width: 100%; text-align: center; }
}

/* ---------- 8. a11y ---------- */
:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link:focus-visible { outline-offset: 4px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .has-js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .nav-link:hover,
  .footer-link:hover { padding-left: 0; }
}