/* ============================================================
   米博体育主站 · 共享样式 /assets/site.css
   骨架：左侧品牌轨道 + 右侧连续画布
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}
body { margin: 0; }
h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Tokens ---------- */
:root {
  --red: #E63946;
  --red-deep: #B91C2B;
  --navy: #0B1F3A;
  --navy-2: #1C2E4A;
  --cyan: #23E0C4;
  --cream: #FFF8F2;
  --grey: #F0EDE8;
  --yellow: #FFC247;
  --ink: #101418;
  --mist: #9FB3C8;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --track-w: 236px;
  --bar-h: 64px;
  --wrap: 1180px;
  --gutter: 24px;

  --rule: 3px solid var(--navy);
  --rule-thin: 1px solid rgba(159, 179, 200, .55);
  --shadow-hard: 8px 8px 0 rgba(11, 31, 58, .92);
  --shadow-red: 8px 8px 0 var(--red-deep);
}

/* ---------- 3. Base typography ---------- */
body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .005em;
  padding-top: var(--bar-h);
  overflow-x: hidden;
}
p { max-width: 68ch; }

.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 6.2vw, 4.5rem);
  line-height: .98;
  letter-spacing: -.035em;
  transform: skewX(-5deg);
  transform-origin: left center;
  display: inline-block;
}
.h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -.025em;
}
.h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  line-height: 1.3;
  letter-spacing: -.01em;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--red);
}
.lede {
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  line-height: 1.7;
  color: var(--navy-2);
  max-width: 60ch;
}
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}
.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.muted { color: var(--navy-2); }

.link-inline {
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--red);
  padding-bottom: 1px;
}
.link-inline:hover { background: var(--red); color: #fff; border-color: var(--red); }

/* ---------- 4. Focus & a11y ---------- */
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}
.track :focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }
#main-content:focus { outline: none; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  background: var(--red);
  color: #fff;
  padding: 12px 20px;
  font-weight: 800;
  font-size: 15px;
  text-decoration: none;
  border: 3px solid var(--navy);
}
.skip-link:focus { left: 14px; top: 14px; }

/* ---------- 5. Layout containers ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.canvas { background: var(--cream); }

.band {
  position: relative;
  padding: 64px 0;
}
.band--tight { padding: 40px 0; }
.band--navy { background: var(--navy); color: var(--cream); }
.band--navy .eyebrow { color: var(--cyan); }
.band--navy .lede { color: rgba(255, 248, 242, .82); }
.band--grey { background: var(--grey); }
.band--rule { border-top: var(--rule-thin); }
.band--edge { border-top: 6px solid var(--red); }

/* ---------- 6. Header / 品牌轨道 ---------- */
.track {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--track-w);
  z-index: 120;
  display: flex;
  flex-direction: column;
  padding: 22px 18px 18px;
  background: var(--navy);
  color: var(--cream);
  border-right: 6px solid var(--red);
}
.track::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(205deg, rgba(35, 224, 196, .16), transparent 46%),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, .035) 0 2px, transparent 2px 10px);
}
.track > * { position: relative; z-index: 1; }

.track__mast { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: inherit;
}
.brand__glyph {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 34px;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--cream);
  transform: skewX(-8deg);
  transform-origin: left bottom;
}
.brand__glyph::after {
  content: "";
  display: block;
  height: 5px;
  width: 46px;
  margin-top: 7px;
  background: var(--red);
}
.brand__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--cyan);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  background: transparent;
  border: 2px solid rgba(255, 248, 242, .5);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
}
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 16px; }
.nav-toggle__bars i { display: block; height: 2px; width: 100%; background: var(--cyan); transition: transform .22s ease, opacity .22s ease; }
.track[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.track[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.track[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.track__nav {
  margin-top: 30px;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}
.nav-list { display: flex; flex-direction: column; gap: 2px; }
.nav-item { margin: 0; }
.nav-link {
  display: grid;
  grid-template-columns: 32px 1fr;
  align-items: baseline;
  gap: 6px;
  padding: 10px 10px 10px 9px;
  color: rgba(255, 248, 242, .74);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  border-left: 4px solid transparent;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.nav-link:hover {
  color: var(--cream);
  background: rgba(255, 255, 255, .07);
  border-left-color: var(--cyan);
}
.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mist);
}
.nav-link[aria-current="page"] {
  color: #fff;
  font-weight: 800;
  background: linear-gradient(90deg, rgba(230, 57, 70, .95), rgba(230, 57, 70, .32));
  border-left-color: var(--yellow);
}
.nav-link[aria-current="page"] .nav-link__idx { color: var(--yellow); }

.track__foot {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(159, 179, 200, .3);
}
.track__note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
  max-width: none;
}
.track__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(35, 224, 196, .18);
  animation: trackPulse 2.6s ease-in-out infinite;
}
@keyframes trackPulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(35, 224, 196, .18); }
  50% { box-shadow: 0 0 0 8px rgba(35, 224, 196, .04); }
}
.track__cta {
  display: block;
  text-align: center;
  padding: 13px 10px;
  background: var(--red);
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .08em;
  text-decoration: none;
  border: 2px solid var(--cream);
  box-shadow: 6px 6px 0 var(--red-deep);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.track__cta:hover { transform: translate(3px, 3px); box-shadow: 3px 3px 0 var(--red-deep); background: var(--red-deep); }

/* ---------- 7. Scroll progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  pointer-events: none;
  background: rgba(11, 31, 58, .12);
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--red), var(--yellow), var(--cyan));
}

/* ---------- 8. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 28px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .05em;
  text-decoration: none;
  color: var(--navy);
  background: transparent;
  border: 3px solid var(--navy);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}
.btn--primary {
  background: var(--red);
  color: #fff;
  border-color: var(--navy);
  box-shadow: var(--shadow-hard);
}
.btn--primary:hover { transform: translate(3px, 3px); box-shadow: 3px 3px 0 var(--navy); }
.btn--ghost { color: var(--navy); }
.btn--ghost:hover { background: var(--navy); color: var(--cream); }
.btn--sm { padding: 10px 18px; font-size: 14px; }
.band--navy .btn--ghost { color: var(--cream); border-color: var(--cream); }
.band--navy .btn--ghost:hover { background: var(--cream); color: var(--navy); }

/* ---------- 9. Breadcrumb ---------- */
.breadcrumb { padding: 20px 0 0; }
.bc-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.bc-item { color: var(--navy-2); }
.bc-item::after { content: "/"; margin-left: 8px; color: var(--mist); }
.bc-item:last-child::after { content: ""; margin: 0; }
.bc-link { color: var(--navy-2); text-decoration: none; border-bottom: 2px solid transparent; }
.bc-link:hover { color: var(--red-deep); border-bottom-color: var(--red); }

/* ---------- 10. Data components ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 4px solid var(--cyan);
}
.stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--navy);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--navy-2);
}
.band--navy .stat { border-left-color: var(--cyan); }
.band--navy .stat__num { color: var(--cream); }
.band--navy .stat__label { color: var(--mist); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--cream);
  border: 2px solid var(--navy);
}
.tag--live { background: var(--red); color: #fff; border-color: var(--red-deep); }
.tag--data { background: var(--cyan); color: var(--navy); }
.tag--warn { background: var(--yellow); color: var(--navy); }

.panel {
  background: #fff;
  border: var(--rule);
  padding: 22px 22px 24px;
  box-shadow: var(--shadow-hard);
}
.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--grey);
}
.panel__body p + p { margin-top: 12px; }

/* ---------- 11. Disclosure（展开内容组，原生 details） ---------- */
.disclosure { border-top: 2px solid var(--navy); }
.disclosure:last-of-type { border-bottom: 2px solid var(--navy); }
.disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 2px;
  cursor: pointer;
  font-weight: 800;
  font-size: 17px;
  list-style: none;
}
.disclosure summary::-webkit-details-marker { display: none; }
.disclosure summary::after {
  content: "＋";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--red);
}
.disclosure[open] summary::after { content: "－"; }
.disclosure[open] summary { color: var(--red-deep); }
.disclosure__body { padding: 0 2px 22px; color: var(--navy-2); }

/* ---------- 12. Media containers（页面阶段放图占位） ---------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--navy-2);
  border: var(--rule);
  box-shadow: var(--shadow-hard);
}
.media > img,
.media > picture,
.media > picture > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--21x9 { aspect-ratio: 21 / 9; }
.media__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 7px 12px;
  background: var(--red);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.media__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--navy-2);
  max-width: 60ch;
}

/* ---------- 13. Reveal ---------- */
html[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .55s ease, transform .55s ease;
}
html[data-reveal-ready] [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 64px;
  padding: 58px 0 26px;
  background: var(--navy);
  color: rgba(255, 248, 242, .82);
  border-top: 8px solid var(--red);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 88% 8%, rgba(35, 224, 196, .12), transparent 40%),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, .028) 0 2px, transparent 2px 10px);
}
.footer__wrap { position: relative; z-index: 1; }

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px 32px;
}
.footer__brand { max-width: 42ch; }
.footer__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: -.03em;
  color: var(--cream);
  transform: skewX(-6deg);
  transform-origin: left center;
  display: inline-block;
  max-width: none;
}
.footer__line {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 248, 242, .74);
}
.footer__stamp {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  padding: 7px 12px;
  border: 2px solid rgba(35, 224, 196, .55);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
  max-width: none;
}
.footer__dot {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  flex: 0 0 auto;
}

.footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--mist);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(159, 179, 200, .3);
}
.footer__list { display: flex; flex-direction: column; gap: 9px; }
.footer__list--plain { gap: 10px; font-family: var(--font-mono); font-size: 13px; letter-spacing: .02em; color: rgba(255, 248, 242, .8); }
.footer__link {
  font-size: 15px;
  color: rgba(255, 248, 242, .82);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}
.footer__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.footer__note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 248, 242, .62);
  max-width: 34ch;
}
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 3px solid rgba(230, 57, 70, .55);
}
.footer__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(255, 248, 242, .68);
  max-width: none;
}

/* ---------- 15. Breakpoints ---------- */
/* 平板及以上：轨道从顶部条变回完整侧栏需要 >=1024，这里处理中间态排版 */
@media (min-width: 640px) {
  .band { padding: 76px 0; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; max-width: 52ch; }
}

@media (min-width: 1024px) {
  html { scroll-padding-top: 24px; }
  body {
    padding-top: 0;
    padding-left: var(--track-w);
  }
  .scroll-progress { left: var(--track-w); }
  .band { padding: 92px 0; }
  .band--tight { padding: 56px 0; }
  .footer__grid { grid-template-columns: 1.5fr 1fr 1fr 1.4fr; }
  .footer__brand { grid-column: auto; }
  .site-footer { margin-top: 88px; }
}

@media (min-width: 1280px) {
  .wrap { padding: 0 32px; }
}

/* 移动/平板：轨道折叠为顶部命令栏 */
@media (max-width: 1023px) {
  .track {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--bar-h);
    flex-direction: row;
    align-items: center;
    padding: 0 14px;
    border-right: 0;
    border-bottom: 5px solid var(--red);
  }
  .track__mast {
    flex: 1 1 auto;
    align-items: center;
    width: 100%;
  }
  .brand { flex-direction: row; align-items: center; gap: 10px; }
  .brand__glyph { font-size: 23px; }
  .brand__glyph::after { display: none; }
  .brand__sub { font-size: 10px; letter-spacing: .22em; }

  .nav-toggle {
    display: inline-flex;
    flex: 0 0 auto;
  }

  .track__nav {
    position: absolute;
    top: var(--bar-h);
    left: 0;
    right: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    background: var(--navy);
    border-bottom: 5px solid var(--red);
    border-top: 1px solid rgba(159, 179, 200, .28);
    transition: max-height .3s ease;
  }
  .track[data-open] .track__nav {
    max-height: calc(100vh - var(--bar-h));
    overflow-y: auto;
  }
  .nav-list { padding: 10px 12px 18px; gap: 4px; }
  .nav-link { font-size: 16px; padding: 12px 10px; }
  .nav-link__idx { font-size: 12px; }

  .track__foot { display: none; }
}

@media (max-width: 400px) {
  .nav-toggle__text { display: none; }
  .brand__sub { display: none; }
}

/* ---------- 16. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html[data-reveal-ready] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .track__dot { animation: none; box-shadow: 0 0 0 4px rgba(35, 224, 196, .18); }
}