/* ==========================================================================
   BVIP体育 — /assets/site.css
   夜场转播台 / 赛事数据控制室
   1. Tokens  2. Reset  3. Typography  4. Utilities  5. Buttons
   6. Header  7. Footer  8. Components  9. Responsive  10. A11y
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --ink-900: #0A0E0D;
  --ink-800: #0E241D;
  --ink-700: #12362B;
  --line: #2B3A34;
  --cyan: #19F7D2;
  --orange: #FF6A2A;
  --paper: #F5F1E8;
  --grey: #9AA6A1;
  --lime: #C6FF4A;
  --teal: #1F6B57;
  --on-accent: #04120F;

  --shell: 1220px;
  --gutter: clamp(18px, 4vw, 48px);
  --radius: 2px;

  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, .55);
  --shadow-lift: 9px 9px 0 rgba(0, 0, 0, .5);

  --font-display: "Oswald", "Barlow Condensed", "Noto Sans SC", "Source Han Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(120% 80% at 50% -10%, rgba(25, 247, 210, .07), transparent 60%),
    radial-gradient(90% 60% at 100% 0%, rgba(255, 106, 42, .05), transparent 55%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

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

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, address { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
::selection { background: var(--cyan); color: var(--on-accent); }

/* ---------- 3. Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .005em;
  text-wrap: balance;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .7rem;
  letter-spacing: .22em;
  line-height: 1.4;
  color: var(--cyan);
  padding: 4px 10px;
  border: 1px solid var(--line);
  background: rgba(18, 54, 43, .5);
  border-radius: 999px;
}

.lede {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.8;
  color: var(--grey);
  max-width: 62ch;
}

/* ---------- 4. Utilities ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.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--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.prose {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--paper);
}
.prose > * + * { margin-top: 1.05em; }
.prose h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  margin-top: 1.9em;
  padding-top: .7em;
  border-top: 2px solid var(--line);
}
.prose h3 { font-size: 1.15rem; margin-top: 1.6em; }
.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(25, 247, 210, .45);
}
.prose a:hover { border-bottom-color: var(--cyan); }
.prose ul, .prose ol { padding-inline-start: 1.2em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .45em; }
.prose li::marker { color: var(--orange); }
.prose strong { font-weight: 700; color: var(--lime); }

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--grey);
  padding-block: 18px;
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.breadcrumbs a { color: var(--grey); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs li + li::before {
  content: "/";
  margin-inline-end: 6px;
  color: var(--line);
}
.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--cyan);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .08em;
  line-height: 1.2;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .6);
  transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease, border-color .16s ease, color .16s ease;
}
.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .6);
}
.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, .6);
}

.btn--cta {
  background: var(--orange);
  border-color: var(--orange);
  color: #180A03;
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--paper);
  box-shadow: none;
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .45);
}

.btn--orange {
  background: transparent;
  border-color: var(--orange);
  color: var(--orange);
  box-shadow: none;
}
.btn--orange:hover { background: var(--orange); color: #180A03; }

/* ---------- 6. Header ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 300;
  padding: 12px 18px;
  background: var(--cyan);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .08em;
  border: 2px solid var(--on-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  transition: top .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible { top: 14px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  color: var(--paper);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(120% 200% at 50% -50%, rgba(25, 247, 210, .13), transparent 62%),
    linear-gradient(180deg, #0A0E0D 0%, #0E241D 100%);
  border-bottom: 2px solid var(--line);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .45);
}

.scroll-meter {
  position: absolute;
  inset-inline-start: 0;
  bottom: -2px;
  width: 0;
  height: 3px;
  z-index: 3;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--lime) 55%, var(--orange) 100%);
  transition: width .1s linear;
}

/* --- 刊头 --- */
.masthead { border-bottom: 1px solid var(--line); }

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 14px;
  padding-block: clamp(10px, 1.6vw, 18px);
  transition: padding-block .2s ease;
}

.utility-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-self: start;
}
.utility-nav__link {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--grey);
  padding-block: 6px;
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}
.utility-nav__link:hover,
.utility-nav__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.masthead__brand {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
  padding-inline: 8px;
}
.masthead__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 2.9vw, 2.05rem);
  line-height: 1;
  letter-spacing: .14em;
  color: var(--paper);
  transition: font-size .2s ease;
}
.masthead__accent { color: var(--cyan); }
.masthead__descriptor {
  overflow: hidden;
  max-height: 22px;
  font-family: var(--font-mono);
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .34em;
  line-height: 1.6;
  color: var(--grey);
  opacity: .95;
  transition: opacity .2s ease, max-height .2s ease;
}

.masthead__actions {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 54, 43, .45);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  transition: border-color .16s ease, color .16s ease;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
  transition: background-color .16s ease, box-shadow .16s ease;
}
.nav-toggle[aria-expanded="true"] {
  border-color: var(--orange);
  color: var(--orange);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: var(--orange);
  box-shadow: 0 -5px 0 var(--orange), 0 5px 0 var(--orange);
}

/* --- 主导航 --- */
.primary-nav {
  display: block;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 36, 29, .6), rgba(10, 14, 13, .2));
}
.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(4px, 1.1vw, 18px);
  padding-block: 8px;
  transition: padding-block .2s ease;
}
.primary-nav__link {
  position: relative;
  display: block;
  padding: 9px 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .08em;
  color: var(--paper);
  transition: color .16s ease;
}
.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s ease, background-color .18s ease;
}
.primary-nav__link:hover { color: var(--cyan); }
.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after { transform: scaleX(1); }
.primary-nav__link[aria-current="page"] { color: var(--cyan); }
.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--orange);
}

/* --- 常驻赛事标签条 --- */
.tabs-bar {
  position: relative;
  background: rgba(10, 14, 13, .82);
  border-bottom: 1px solid var(--line);
}
.tabs-bar__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-block: 9px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  transition: padding-block .2s ease;
}
.tabs-bar__inner::-webkit-scrollbar { height: 6px; }
.tabs-bar__inner::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 999px;
}
.tabs-bar__label {
  flex: none;
  padding-inline-end: 14px;
  border-inline-end: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--grey);
  white-space: nowrap;
}
.tabs-bar__list {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}
.tab-chip {
  display: block;
  white-space: nowrap;
  padding: 6px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 54, 43, .55);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .05em;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}
.tab-chip:hover,
.tab-chip:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--on-accent);
}
.tab-chip--hot {
  border-color: var(--orange);
  color: var(--orange);
}
.tab-chip--hot:hover,
.tab-chip--hot:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: #180A03;
}

/* --- 头部压缩态（JS: is-condensed） --- */
.site-header.is-condensed .masthead__inner { padding-block: 6px; }
.site-header.is-condensed .masthead__name { font-size: clamp(1.15rem, 2vw, 1.35rem); }
.site-header.is-condensed .masthead__descriptor { opacity: 0; max-height: 0; }
.site-header.is-condensed .primary-nav__list { padding-block: 3px; }
.site-header.is-condensed .tabs-bar__inner { padding-block: 6px; }

/* ---------- 7. Footer ---------- */
.site-footer {
  margin-top: clamp(56px, 9vw, 110px);
  color: var(--paper);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(90% 120% at 12% 0%, rgba(25, 247, 210, .08), transparent 58%),
    linear-gradient(180deg, #0E241D 0%, #0A0E0D 72%);
  border-top: 2px solid var(--line);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(22px, 3.2vw, 46px);
  padding-block: clamp(34px, 5vw, 68px);
}

.footer__brand { min-width: 0; }
.footer__mark {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  line-height: 1;
  letter-spacing: .12em;
  color: var(--paper);
  border-bottom: 2px solid var(--line);
  padding-bottom: 12px;
}
.footer__accent { color: var(--cyan); }
.footer__tag {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .26em;
  color: var(--orange);
}
.footer__desc {
  margin-top: 10px;
  max-width: 34ch;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--grey);
}

.footer__col { min-width: 0; }
.footer__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--grey);
}

.footer__list li + li { margin-top: 2px; }
.footer__list a {
  display: inline-block;
  padding-block: 5px;
  font-size: .93rem;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}
.footer__list a:hover,
.footer__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.footer__item {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  padding-block: 6px;
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.6;
  color: var(--paper);
  border-bottom: 1px dashed rgba(43, 58, 52, .8);
}
.footer__label {
  flex: none;
  min-width: 34px;
  color: var(--cyan);
  font-size: .68rem;
  letter-spacing: .14em;
}
.footer__note {
  margin-top: 12px;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--grey);
}

.footer__legal {
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, .38);
}
.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-block: 16px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--grey);
}
.footer__copy { color: var(--paper); }
.footer__icp { color: var(--grey); }
.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}
.footer__legal-links a {
  color: var(--grey);
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}
.footer__legal-links a:hover,
.footer__legal-links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.to-top {
  margin-inline-start: auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--grey);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s ease, visibility .2s ease, color .16s ease, border-color .16s ease;
}
.to-top.is-visible { opacity: 1; visibility: visible; }
.to-top:hover,
.to-top:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 8. Components ---------- */
.card {
  padding: clamp(16px, 2vw, 26px);
  background: var(--ink-800);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-lift);
}

/* 可复用图片容器：页面阶段放入 img / picture */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--ink-700);
  background-image:
    linear-gradient(135deg, rgba(25, 247, 210, .16), transparent 46%),
    linear-gradient(160deg, #0E241D 0%, #12362B 100%);
  box-shadow: var(--shadow-hard);
}
.media > img,
.media > picture,
.media > picture > img,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(245, 241, 232, .055) 0 1px,
    transparent 1px 7px
  );
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }
.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--grey);
}

/* ---------- 9. Responsive ---------- */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .masthead__inner { gap: 8px; }
  .utility-nav { display: none; }
  .masthead__actions .btn--cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .masthead__name { letter-spacing: .1em; }
  .masthead__descriptor { letter-spacing: .22em; }

  .primary-nav { display: none; }
  .primary-nav[data-open="true"] {
    display: block;
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(18, 54, 43, .92), rgba(10, 14, 13, .96));
  }
  .primary-nav[data-open="true"] .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 6px;
  }
  .primary-nav[data-open="true"] .primary-nav__link {
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
    font-size: 1.02rem;
  }
  .primary-nav[data-open="true"] .primary-nav__link::after {
    left: 4px;
    right: auto;
    bottom: 8px;
    width: 22px;
    height: 3px;
  }

  .tabs-bar__inner { gap: 10px; }
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__legal-inner { gap: 8px 18px; }
  .to-top { margin-inline-start: 0; }
  .btn { width: 100%; }
  .masthead__actions .nav-toggle { width: auto; }
}

@media (min-width: 861px) {
  .primary-nav { display: block; }
}

/* ---------- 10. A11y ---------- */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 2px #0A0E0D;
  border-radius: var(--radius);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .btn:hover,
  .btn:active,
  .card:hover {
    transform: none;
  }
  .scroll-meter { transition: none; }
}