:root {
  --c-deep: #0B1F3B;
  --c-orange: #FF6B35;
  --c-neon: #39FF14;
  --c-paper: #F8F9FA;
  --c-dark: #081524;
  --c-ink: #1E1E24;
  --c-muted: #5A6B7A;
  --c-success: #2E7D32;
  --c-warning: #F9A825;
  --c-info: #03A9F4;
  --c-divider: #D1D8DD;
  --font-display: Impact, 'Arial Black', 'PingFang SC', 'Heiti SC', sans-serif;
  --font-body: Inter, 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;
  --header-height: 66px;
  --radius: 0;
  --shadow-card: 0 12px 30px rgba(11, 31, 59, 0.08);
  --shadow-deep: 0 18px 45px rgba(0, 0, 0, 0.25);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--c-paper);
  color: var(--c-ink);
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}

main {
  display: block;
}

#main-content {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

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

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

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 1rem;
}

::selection {
  background: var(--c-orange);
  color: #fff;
}

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

.site-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-orange) 0 70%, var(--c-neon) 70% 100%);
  z-index: 1200;
  pointer-events: none;
}

.site-header__skip {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 1300;
  background: var(--c-deep);
  color: #fff;
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  border: 1px solid var(--c-neon);
  transition: top 0.2s ease;
}

.site-header__skip:focus {
  top: 1rem;
}

.site-header {
  position: relative;
  background: var(--c-deep);
  color: #fff;
  border-bottom: 1px solid rgba(255, 107, 53, 0.35);
  z-index: 100;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 20%, rgba(57, 255, 20, 0.07) 20.2%, transparent 20.6%),
    repeating-linear-gradient(45deg, transparent 0 14px, rgba(255, 255, 255, 0.02) 14px 15px);
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 1.25rem;
  min-height: var(--header-height);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  padding-block: 0.75rem;
  flex-shrink: 0;
}

.site-header__brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--c-orange);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0;
  clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%);
}

.site-header__quick {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: auto;
}

.site-header__quick-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  clip-path: polygon(0 0, calc(100% - 0.4rem) 0, 100% 0.4rem, 100% 100%, 0.4rem 100%, 0 calc(100% - 0.4rem));
}

.site-header__quick-link:hover {
  background: rgba(255, 255, 255, 0.15);
}

.site-header__quick-link--accent {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-deep);
}

.site-header__quick-link--accent:hover {
  background: #ff8250;
}

.site-header__toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 0.5rem 0.7rem;
  font-size: 0.85rem;
  line-height: 1;
}

.site-header__toggle-bars {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.site-header__toggle-bars::before,
.site-header__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
}

.site-header__toggle-bars::before {
  top: -6px;
}

.site-header__toggle-bars::after {
  bottom: -6px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bars {
  background: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bars::before {
  transform: rotate(45deg);
  top: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bars::after {
  transform: rotate(-45deg);
  bottom: 0;
}

.site-header__nav {
  display: flex;
  align-items: center;
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.site-header__nav-wrap {
  display: flex;
  align-items: center;
}

.site-header__nav-list {
  display: flex;
  gap: 0.4rem;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.6rem 0.75rem;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border-bottom-color: var(--c-orange);
}

.site-header__nav-link[aria-current="page"] {
  color: #fff;
  border-bottom-color: var(--c-neon);
}

.site-header__nav-index {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--c-orange);
  letter-spacing: 0.02em;
}

.site-header__nav-link[aria-current="page"] .site-header__nav-index {
  color: var(--c-neon);
}

.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.container--wide {
  max-width: 1440px;
}

.page-section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.page-section--alt {
  background: var(--c-paper);
}

.page-section--dark {
  background: var(--c-dark);
  color: #fff;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 2.25rem;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-orange);
  margin: 0 0 0.25rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.65rem);
  font-weight: 900;
  margin: 0;
}

.section-title--light {
  color: #fff;
}

.section-description {
  color: var(--c-muted);
  max-width: 65ch;
  margin: 0.75rem 0 0;
}

.section-header__end {
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.3rem;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  background: var(--c-deep);
  color: #fff;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 0.5rem) 0, 100% 0.5rem, 100% 100%, 0.5rem 100%, 0 calc(100% - 0.5rem));
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--c-orange);
  color: var(--c-deep);
}

.btn--outline {
  background: transparent;
  border-color: currentColor;
  color: inherit;
  clip-path: none;
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
  clip-path: none;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #fff;
  border: 1px solid var(--c-divider);
  border-top: 4px solid var(--c-orange);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.card--dark {
  background: var(--c-deep);
  border-top-color: var(--c-neon);
  box-shadow: var(--shadow-deep);
  color: #fff;
}

.card--compact {
  padding: 1.2rem;
}

.data-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-divider);
  border-left: 4px solid var(--c-orange);
  padding: 1.4rem;
  box-shadow: var(--shadow-card);
}

.data-card__value {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1;
  color: var(--c-orange);
  letter-spacing: -0.02em;
}

.data-card__label {
  font-size: 0.82rem;
  color: var(--c-muted);
  margin-top: 0.6rem;
  letter-spacing: 0.02em;
}

.data-card--dark {
  background: var(--c-deep);
  border-left-color: var(--c-neon);
}

.data-card--dark .data-card__value {
  color: var(--c-neon);
}

.data-card--dark .data-card__label {
  color: rgba(255, 255, 255, 0.65);
}

.tabs {
  background: #fff;
  border: 1px solid var(--c-divider);
  box-shadow: var(--shadow-card);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--c-divider);
  background: rgba(216, 224, 231, 0.2);
}

.tab-button {
  background: transparent;
  border: 0;
  padding: 0.85rem 1.2rem;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--c-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tab-button:hover {
  color: var(--c-deep);
  background: rgba(255, 255, 255, 0.5);
}

.tab-button.is-active,
.tab-button[aria-selected="true"] {
  color: var(--c-deep);
  border-bottom-color: var(--c-orange);
  background: #fff;
}

.tab-panel {
  display: block;
  padding: 1.5rem;
}

.tab-panel[hidden] {
  display: none;
}

.page-header {
  background: var(--c-deep);
  color: #fff;
  padding: clamp(3rem, 6vw, 5rem) 0;
  position: relative;
  overflow: hidden;
}

.page-header::after {
  content: "";
  position: absolute;
  right: -5rem;
  top: -5rem;
  width: 16rem;
  height: 16rem;
  border: 2px solid rgba(57, 255, 20, 0.2);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-header__inner {
  position: relative;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.page-header__title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  margin: 0.5rem 0 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a {
  color: var(--c-orange);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--c-neon);
  font-weight: 600;
}

.figure {
  position: relative;
  background: var(--c-deep);
  overflow: hidden;
}

.figure::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 58%, rgba(255, 107, 53, 0.3) 58.2%, transparent 58.6%),
    repeating-linear-gradient(45deg, transparent 0 18px, rgba(255, 255, 255, 0.05) 18px 19px);
}

.figure::after {
  content: "DIGITAL / SPORTS DATA";
  position: absolute;
  right: 0.9rem;
  bottom: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.5);
  z-index: 1;
}

.figure--16-9 {
  aspect-ratio: 16 / 9;
}

.figure--4-3 {
  aspect-ratio: 4 / 3;
}

.figure--1-1 {
  aspect-ratio: 1 / 1;
}

.site-footer {
  background: var(--c-dark);
  color: rgba(255, 255, 255, 0.78);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "YK";
  position: absolute;
  right: -2rem;
  bottom: -5rem;
  font-family: var(--font-display);
  font-size: 18rem;
  color: rgba(255, 255, 255, 0.02);
  pointer-events: none;
  line-height: 1;
}

.site-footer__inner {
  position: relative;
  max-width: 1280px;
  margin-inline: auto;
  padding: clamp(3rem, 6vw, 5rem) 1.25rem 2.5rem;
  display: grid;
  grid-template-columns: minmax(0, 2fr) 1fr 1fr minmax(0, 1.5fr);
  gap: 2.5rem;
}

.site-footer__logo {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.site-footer__logo:hover {
  color: var(--c-orange);
}

.site-footer__tagline {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--c-orange);
  letter-spacing: 0.18em;
  margin-bottom: 1.2rem;
}

.site-footer__trust {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
  border-left: 3px solid var(--c-neon);
  padding-left: 1rem;
  max-width: 42ch;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-neon);
  margin-bottom: 1.1rem;
}

.site-footer__nav ul li {
  margin-bottom: 0.55rem;
}

.site-footer__nav a {
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__nav a:hover {
  color: #fff;
  padding-left: 0.25rem;
}

.site-footer__meta p {
  margin: 0 0 0.5rem;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer__legal {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 1280px;
  margin-inline: auto;
  padding: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer__legal p {
  margin: 0;
}

.text-muted {
  color: var(--c-muted);
}

.text-mono {
  font-family: var(--font-mono);
}

.text-display {
  font-family: var(--font-display);
  font-weight: 900;
}

.list-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 1080px) {
  .site-header__nav-link {
    padding: 0.6rem 0.5rem;
    font-size: 0.88rem;
  }

  .site-footer__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 900px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding-block: 0.65rem;
    gap: 0.75rem;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__quick {
    margin-left: auto;
  }

  .site-header__nav {
    order: 5;
    flex-basis: 100%;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.25s ease, opacity 0.2s ease, visibility 0.2s;
    margin-left: 0;
  }

  .site-header__nav[data-open] {
    grid-template-rows: 1fr;
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }

  .site-header__nav-wrap {
    min-height: 0;
    overflow: hidden;
  }

  .site-header__nav-list {
    flex-direction: column;
    gap: 0;
    padding: 0.4rem 0 1rem;
  }

  .site-header__nav-link {
    display: flex;
    padding: 0.75rem 0.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 58px;
  }

  .container {
    padding-inline: 1rem;
  }

  .site-header__inner {
    padding-inline: 1rem;
  }

  .site-header__quick .site-header__quick-link:not(.site-header__quick-link--accent) {
    display: none;
  }

  .site-header__brand-text {
    font-size: 1.15rem;
  }

  .site-header__brand-mark {
    width: 32px;
    height: 32px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .section-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-header__end {
    margin-left: 0;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer__legal {
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  .site-progress {
    display: none;
  }
}