:root {
  --c-deep: #0A1F44;
  --c-orange: #FF6B00;
  --c-gold: #FFD700;
  --c-purple: #4A1E7A;
  --c-light: #F5F7FA;
  --c-dark: #1A1A1A;
  --c-white: #FFFFFF;
  --c-border: #3A4A6B;
  --c-green: #00C48C;
  --c-red: #E63946;
  --font-head: "Montserrat ExtraBold", "Montserrat", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Roboto", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "Courier Prime", "Consolas", monospace;
  --container: 1200px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--c-light);
  color: var(--c-dark);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 0.5em;
}

h1 {
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.05;
}

h2 {
  font-size: clamp(28px, 4vw, 44px);
}

h3 {
  font-size: clamp(20px, 2vw, 28px);
}

p {
  margin: 0 0 1em;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 120;
  background: var(--c-orange);
  color: var(--c-white);
  padding: 10px 18px;
  border-radius: 0 0 6px 0;
  font-weight: 700;
  text-decoration: none;
  transition: left 0.2s ease;
}

.skip-link:focus {
  left: 0;
  color: var(--c-white);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(135deg, #07183A 0%, var(--c-deep) 55%, #1D1145 100%);
  color: var(--c-white);
  border-bottom: 1px solid var(--c-border);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  z-index: 0;
  width: 42%;
  height: 100%;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 15%, rgba(255, 215, 0, 0.08) 15%, rgba(255, 215, 0, 0.08) 23%, rgba(255, 107, 0, 0.16) 23%, rgba(255, 107, 0, 0.16) 36%, transparent 36%);
  clip-path: polygon(100% 0, 100% 100%, 55% 100%);
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  z-index: 0;
  width: 22%;
  height: 100%;
  pointer-events: none;
  background: rgba(255, 107, 0, 0.12);
  clip-path: polygon(80% 0, 100% 0, 100% 100%, 38% 100%);
}

.header-upper,
.header-lower {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.header-upper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
}

.header-lower {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-identity {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: none;
}

.brand-mark-core {
  width: 22px;
  height: 22px;
  background: var(--c-orange);
  clip-path: polygon(0 50%, 50% 0, 100% 50%, 50% 100%);
  box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.18);
}

.brand-mark-orbit {
  position: absolute;
  inset: 2px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--c-gold);
  animation: brand-spin 8s linear infinite;
}

@keyframes brand-spin {
  to {
    transform: rotate(360deg);
  }
}

.brand-link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--c-white);
  line-height: 1.15;
}

.brand-cn {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.04em;
}

.brand-sub {
  font-size: 11px;
  letter-spacing: 0.34em;
  color: var(--c-gold);
  text-transform: uppercase;
}

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

.tool-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 6px 10px;
  border-radius: 999px;
}

.tool-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  animation: live-pulse 2s infinite;
}

@keyframes live-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 196, 140, 0.5);
  }
  100% {
    box-shadow: 0 0 0 8px rgba(0, 196, 140, 0);
  }
}

.tool-link,
.tool-member {
  color: var(--c-white);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 12px;
  border: 1px solid var(--c-border);
  border-radius: 3px;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.tool-member {
  background: linear-gradient(135deg, rgba(255, 107, 0, 0.2), rgba(255, 215, 0, 0.08));
  border-color: rgba(255, 215, 0, 0.35);
  color: var(--c-gold);
}

.tool-link:hover,
.tool-link:focus-visible,
.tool-member:hover,
.tool-member:focus-visible {
  color: var(--c-orange);
  border-color: var(--c-orange);
}

.tool-link:active,
.tool-member:active {
  transform: translateY(1px);
}

.tool-search {
  font-size: 28px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.7);
  padding: 0 2px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-white);
  padding: 10px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 700;
}

.nav-toggle-box {
  display: grid;
  gap: 4px;
  width: 20px;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle-text {
  font-size: 13px;
  letter-spacing: 0.08em;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

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

.nav-list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: 14px 16px;
  color: rgba(255, 255, 255, 0.86);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-bottom: 3px solid transparent;
  transition: color 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-orange);
}

.nav-link:active {
  background: rgba(255, 107, 0, 0.12);
  color: var(--c-orange);
}

.site-nav .nav-link[aria-current="page"] {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
  background: linear-gradient(180deg, transparent 50%, rgba(255, 107, 0, 0.16) 50%);
}

.header-route {
  display: flex;
  align-items: center;
  gap: 12px;
}

.route-line {
  width: 52px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-gold));
}

.route-code {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 3px;
  width: 100%;
  z-index: 10;
  background: linear-gradient(90deg, var(--c-orange), var(--c-gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.08s linear;
}

.site-footer {
  background: linear-gradient(180deg, #07183A 0%, var(--c-deep) 40%, #20104D 140%);
  color: var(--c-white);
  border-top: 6px solid var(--c-orange);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 6px;
  right: 0;
  width: 38%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), transparent);
  pointer-events: none;
}

.footer-panel,
.footer-bottom {
  max-width: var(--container);
  margin-inline: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.footer-panel {
  display: grid;
  grid-template-columns: minmax(0, 2fr) 1fr 1fr 1fr;
  gap: 32px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.footer-brand {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px 16px;
  min-width: 0;
}

.footer-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--c-orange);
  color: var(--c-white);
  font-family: var(--font-head);
  font-weight: 800;
  align-self: start;
  clip-path: polygon(0 0, 100% 0, 100% 75%, 50% 100%, 0 75%);
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-brand-text strong {
  font-family: var(--font-head);
  font-size: 22px;
}

.footer-brand-text span {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-gold);
  text-transform: uppercase;
}

.footer-desc {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 34em;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

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

.footer-title {
  margin: 0 0 18px;
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.footer-list li {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.6;
}

.footer-list a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--c-orange);
  padding-left: 4px;
}

.footer-list a:active {
  color: var(--c-orange);
  opacity: 0.8;
}

.footer-legal a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-legal a::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--c-orange);
  transform: rotate(45deg);
  flex: none;
}

.footer-note {
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-top: 18px;
  padding-bottom: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.footer-bottom p {
  margin: 0;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.main-content {
  display: block;
  min-height: 70vh;
  scroll-margin-top: 130px;
}

.section {
  padding: clamp(56px, 8vw, 108px) 0;
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 24px;
  align-items: end;
  margin-bottom: 32px;
}

.section-head .section-index {
  grid-row: 1 / span 2;
  align-self: start;
}

.section-index {
  font-family: var(--font-data);
  font-size: clamp(46px, 6vw, 88px);
  line-height: 0.8;
  color: var(--c-orange);
  letter-spacing: -0.06em;
}

.section-kicker {
  grid-column: 2;
  color: var(--c-purple);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 6px;
}

.section-title {
  grid-column: 2;
  margin: 0;
  color: var(--c-deep);
  font-size: clamp(26px, 4vw, 40px);
  max-width: 20em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  background: transparent;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  border-radius: 4px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

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

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn-primary {
  background: var(--c-orange);
  color: var(--c-white);
  padding-right: 30px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 50%, calc(100% - 14px) 100%, 0 100%);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 10px 24px rgba(255, 107, 0, 0.25);
  color: var(--c-white);
}

.btn-ghost {
  color: var(--c-deep);
  border-color: var(--c-deep);
  background: transparent;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.content-grid {
  display: grid;
  gap: 24px;
}

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

.info-grid {
  display: grid;
  gap: 20px;
}

.data-card {
  position: relative;
  background: var(--c-white);
  border-left: 4px solid var(--c-orange);
  padding: 24px;
  box-shadow: 0 8px 30px rgba(10, 31, 68, 0.08);
}

.data-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 36px;
  height: 36px;
  background: var(--c-deep);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}

.card-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #5B6B8C;
}

.card-value {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.1;
  color: var(--c-deep);
  margin: 8px 0;
}

.card-extra {
  display: block;
  font-size: 14px;
  color: #5B6B8C;
}

.media-frame {
  position: relative;
  background: var(--c-deep);
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(74, 30, 122, 0.35), rgba(255, 107, 0, 0.12));
  pointer-events: none;
}

.media-frame::after {
  content: "SPORTS DATA";
  position: absolute;
  left: 14px;
  bottom: 10px;
  z-index: 2;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.25em;
  color: rgba(255, 255, 255, 0.65);
}

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

.media-frame-wide {
  aspect-ratio: 16 / 7;
}

.media-frame-portrait {
  aspect-ratio: 4 / 5;
}

.breadcrumb {
  padding: 18px 0 0;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  color: #5B6B8C;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin: 0 8px;
  color: var(--c-orange);
  font-family: var(--font-data);
}

.breadcrumb-link {
  color: var(--c-deep);
  text-decoration: none;
}

.breadcrumb-link:hover,
.breadcrumb-link:focus-visible {
  color: var(--c-orange);
}

.breadcrumb-current {
  color: #5B6B8C;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

[data-disclosure-toggle] {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 18px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-deep);
  font-family: var(--font-body);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

[data-disclosure-toggle]::after {
  content: "＋";
  color: var(--c-orange);
  font-family: var(--font-data);
  font-size: 22px;
  line-height: 1;
  margin-left: 16px;
}

[data-disclosure-toggle][aria-expanded="true"]::after {
  content: "－";
}

[data-disclosure-toggle]:active {
  color: var(--c-orange);
}

[data-disclosure-panel] {
  display: none;
  padding-bottom: 18px;
}

[data-disclosure-panel][data-open] {
  display: block;
  animation: disclosure-fade 0.3s ease;
}

@keyframes disclosure-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

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

@media (max-width: 960px) {
  .footer-panel {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 880px) {
  .header-upper {
    min-height: 56px;
  }

  .header-tools .tool-status,
  .tool-search {
    display: none;
  }

  .header-route {
    display: none;
  }

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

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 30;
    background: var(--c-deep);
    border-top: 1px solid var(--c-border);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
    padding: 12px;
  }

  .site-nav[data-open] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-link {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 3px solid transparent;
  }

  .site-nav .nav-link[aria-current="page"] {
    border-left-color: var(--c-orange);
    border-bottom-color: transparent;
  }
}

@media (max-width: 640px) {
  .brand-sub {
    display: none;
  }

  .tool-link {
    display: none;
  }

  .tool-member {
    font-size: 12px;
    padding: 6px 8px;
  }

  .header-upper,
  .header-lower {
    padding-inline: 16px;
  }

  .footer-panel {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 44px;
    padding-bottom: 36px;
  }

  .footer-panel,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

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

@media (min-width: 760px) {
  .content-grid.cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .content-grid.cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}