/* =========================================================
   BY体育官方正版 · Site Kit
   /assets/site.css
   ========================================================= */

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

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

body {
  margin: 0;
  min-height: 100%;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.55em;
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.18;
  color: var(--color-white);
}

h1 { font-size: clamp(2rem, 5.2vw, 3.75rem); }
h2 { font-size: clamp(1.55rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.55rem); }
h4, h5, h6 { font-size: 1.1rem; }

p, ul, ol, dl, blockquote, figure {
  margin: 0 0 1.15em;
}

ul[class], ol[class] {
  list-style: none;
  margin: 0;
  padding: 0;
}

a {
  color: var(--color-accent-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent);
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  margin: 0;
  padding: 0;
}

button { cursor: pointer; }

strong { font-weight: 700; }

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

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Tokens ---------- */
:root {
  --color-primary: #0B1D3A;
  --color-primary-light: #1E3A5F;
  --color-accent: #00FFA3;
  --color-accent-dim: #00CC82;
  --color-secondary: #FF6B2C;
  --color-ink: #0A0F1E;
  --color-surface: #F8FAFC;
  --color-slate: #2D3A5A;
  --color-cream: #FFF8EC;
  --color-gray: #A0AEC0;
  --color-white: #FFFFFF;
  --color-black: #000000;

  --font-headline: "Archivo Black", "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --container: 1280px;
  --gap: clamp(16px, 3vw, 24px);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;

  --line-faint: rgba(248, 250, 252, 0.12);
  --line-strong: rgba(248, 250, 252, 0.28);
  --shadow-card: 0 18px 44px rgba(5, 10, 22, 0.38);
  --shadow-pop: 0 6px 20px rgba(0, 255, 163, 0.16);
}

/* ---------- Container & Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.main-content {
  display: block;
  min-height: 55vh;
}

.section {
  padding-block: var(--space-6);
}

.section--tight {
  padding-block: var(--space-4);
}

.section--loose {
  padding-block: var(--space-7);
}

.section--light {
  background: var(--color-surface);
  color: var(--color-primary);
}

.section--light h1,
.section--light h2,
.section--light h3,
.section--light h4,
.section--light h5 {
  color: var(--color-primary);
}

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

.section--cream {
  background: var(--color-cream);
  color: var(--color-primary);
}

.section--cream h1,
.section--cream h2,
.section--cream h3,
.section--cream h4 {
  color: var(--color-primary);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section-kicker {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  margin: 0;
  max-width: 22ch;
}

.section-title .marker {
  color: var(--color-secondary);
}

.section-desc {
  max-width: 58ch;
  color: var(--color-gray);
}

.section--light .section-desc,
.section--cream .section-desc {
  color: var(--color-slate);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  text-align: center;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-ink);
}

.btn-primary:hover {
  background: var(--color-accent-dim);
  border-color: var(--color-accent-dim);
  color: var(--color-ink);
}

.btn-secondary {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-white);
}

.btn-secondary:hover {
  background: #E0521B;
  border-color: #E0521B;
  color: var(--color-white);
}

.btn-outline {
  border-color: var(--line-strong);
  color: var(--color-white);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-ghost {
  color: var(--color-accent);
}

.btn-ghost:hover {
  background: rgba(0, 255, 163, 0.08);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--space-4);
  padding: 10px 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gray);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.breadcrumb a {
  color: var(--color-accent-dim);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb [aria-current="page"] {
  color: var(--color-white);
}

/* ---------- Bento Grid ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
}

.bento-cell {
  grid-column: 1 / -1;
}

@media (min-width: 601px) {
  .bento-cell {
    grid-column: span 6;
  }

  .bento-cell--full {
    grid-column: 1 / -1;
  }
}

@media (min-width: 901px) {
  .bento-cell--half {
    grid-column: span 6;
  }

  .bento-cell--third {
    grid-column: span 4;
  }

  .bento-cell--two-thirds {
    grid-column: span 8;
  }

  .bento-cell--full {
    grid-column: span 12;
  }
}

/* ---------- Cards ---------- */
.card {
  position: relative;
  padding: var(--space-4);
  background: var(--color-primary-light);
  border: 1px solid var(--line-faint);
  box-shadow: var(--shadow-card);
}

.card--light {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: rgba(11, 29, 58, 0.15);
}

.card--light h1,
.card--light h2,
.card--light h3,
.card--light h4 {
  color: var(--color-primary);
}

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

.card--cream {
  background: var(--color-cream);
  color: var(--color-primary);
}

.card--cream h3,
.card--cream h4 {
  color: var(--color-primary);
}

.card--accent {
  border-top-color: var(--color-accent);
}

.card--alert {
  border-top-color: var(--color-secondary);
}

.card-title {
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray);
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-slate);
  border: 1px solid var(--line-faint);
}

.tag--green {
  color: var(--color-accent);
  background: rgba(0, 255, 163, 0.1);
  border-color: rgba(0, 255, 163, 0.35);
}

.tag--orange {
  color: var(--color-white);
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

.tag--outline {
  background: transparent;
  color: var(--color-gray);
}

/* ---------- Data Components ---------- */
.data-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.data-stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-accent);
}

.data-stat__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.data-pair {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
}

.data-pair__num {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-accent);
}

.data-pair__label {
  font-size: 0.75rem;
  color: var(--color-gray);
}

/* ---------- Media Frame ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-ink);
  border: 1px solid var(--line-faint);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0, 255, 163, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 163, 0.09) 1px, transparent 1px);
  background-size: 22px 22px;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(120% 100% at 75% 0%, rgba(30, 58, 95, 0.35), transparent 55%);
}

.media-frame img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1300;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- Header ---------- */
.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 2000;
  padding: 10px 18px;
  background: var(--color-accent);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  transform: translateY(-200%);
  transition: transform 0.2s ease, color 0.2s ease;
}

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

.skip-link:focus:not(:focus-visible) {
  transform: translateY(-200%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--color-primary);
  border-bottom: 1px solid var(--line-faint);
  box-shadow: 0 10px 30px rgba(5, 10, 22, 0.25);
}

.ticker-bar {
  background: var(--color-ink);
  border-bottom: 1px solid rgba(0, 255, 163, 0.25);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-gray);
}

.ticker-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 32px;
}

.ticker-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.ticker-dot {
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  animation: ticker-pulse 1.6s ease-in-out infinite;
}

.ticker-text {
  flex: 1 1 auto;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--color-gray);
}

.ticker-meta {
  flex: 0 0 auto;
  color: var(--color-accent-dim);
}

@keyframes ticker-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.header-main {
  position: relative;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 84px;
  padding-block: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--color-ink);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px rgba(0, 255, 163, 0.15);
}

.brand-mark svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-headline);
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--color-white);
}

.brand-sub {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  color: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  background: rgba(10, 15, 30, 0.4);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.lang-switch:hover {
  border-color: var(--color-accent);
  background: rgba(0, 255, 163, 0.08);
}

.lang-zh,
.lang-en {
  color: var(--color-gray);
}

.lang-sep {
  color: var(--color-slate);
}

.lang-switch[aria-pressed="false"] .lang-zh,
.lang-switch[aria-pressed="true"] .lang-en {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  background: rgba(10, 15, 30, 0.4);
  color: var(--color-accent);
}

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

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-burger {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

.header-nav {
  position: relative;
  background: rgba(30, 58, 95, 0.22);
  border-top: 1px solid var(--line-faint);
}

.nav-list {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  column-gap: 2px;
}

.nav-link {
  display: block;
  padding: 13px 18px 11px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-white);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-accent);
  background: rgba(0, 255, 163, 0.05);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-secondary);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary);
    border-top: 1px solid var(--line-faint);
    border-bottom: 1px solid var(--line-faint);
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.24s ease, transform 0.24s ease, visibility 0.24s;
  }

  .header-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    padding: 6px 0 12px;
  }

  .nav-list li + li {
    border-top: 1px solid var(--line-faint);
  }

  .nav-link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding: 14px 6px;
    font-size: 1rem;
  }

  .nav-link:hover {
    background: rgba(0, 255, 163, 0.06);
  }

  .nav-link[aria-current="page"] {
    border-left-color: var(--color-secondary);
    border-bottom: 0;
    color: var(--color-accent);
  }
}

@media (max-width: 480px) {
  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-name {
    font-size: 0.95rem;
  }

  .brand-sub {
    font-size: 0.6rem;
    letter-spacing: 0.18em;
  }

  .lang-switch {
    padding: 3px 8px;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-ink);
  border-top: 1px solid var(--line-strong);
  color: var(--color-gray);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.8fr 1.3fr;
  gap: clamp(24px, 4vw, 48px);
  padding-block: var(--space-6) var(--space-5);
}

.footer-about .brand {
  margin-bottom: var(--space-3);
}

.footer-tagline {
  max-width: 34ch;
  margin: 0 0 var(--space-3);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--color-gray);
}

.footer-nav {
  min-width: 0;
}

.footer-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-link {
  font-size: 0.88rem;
  color: var(--color-gray);
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-contact-list {
  margin: 0 0 var(--space-3);
}

.footer-contact-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 0.88rem;
  line-height: 1.6;
}

.footer-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-dim);
}

.footer-value {
  min-width: 0;
  word-break: break-all;
  color: var(--color-white);
}

.footer-contact-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  border-bottom: 1px solid rgba(0, 255, 163, 0.4);
}

.footer-contact-link:hover {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--line-faint);
  padding-block: var(--space-3);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-gray);
}

.footer-copy {
  margin: 0;
}

.footer-icp {
  margin: 0;
  color: var(--color-gray);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Reveal on Scroll ---------- */
html.reveal-setup [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

html.reveal-setup [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

html.reveal-setup [data-reveal][data-reveal="delay-1"] {
  transition-delay: 0.1s;
}

html.reveal-setup [data-reveal][data-reveal="delay-2"] {
  transition-delay: 0.2s;
}

html.reveal-setup [data-reveal][data-reveal="delay-3"] {
  transition-delay: 0.3s;
}

@media (prefers-reduced-motion: reduce) {
  html.reveal-setup [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}