:root {
  --ink: #0B0F14;
  --panel: #121820;
  --elevated: #1E2631;
  --line: #2E3A46;
  --neon: #C8FF00;
  --signal: #FF6A00;
  --data-cyan: #00D6E0;
  --muted: #8B9AA7;
  --white: #F4F7FA;
  --amber: #FFC247;
  --font-display: 'Archivo Black', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'JetBrains Mono', 'Roboto Mono', 'SFMono-Regular', monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.25rem;
  --text-lg: 1.563rem;
  --text-xl: 1.953rem;
  --text-2xl: 2.441rem;
  --text-3xl: 3.052rem;
  --text-4xl: 3.815rem;
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
}

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

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  color: var(--white);
}

h1 {
  font-size: clamp(2.44rem, 6vw, var(--text-4xl));
}

h2 {
  font-size: clamp(1.95rem, 4vw, var(--text-3xl));
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, var(--text-xl));
}

h4 {
  font-size: var(--text-md);
}

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

#main-content {
  scroll-margin-top: 100px;
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 300;
  padding: 8px 16px;
  background: var(--neon);
  color: var(--ink);
  font-weight: 700;
  font-size: var(--text-sm);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 100%, 8px 100%);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.header-shell {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 76px;
}

.header-brand-pane {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--panel) 0%, var(--ink) 100%);
  border-right: 1px solid var(--line);
}

.site-descriptor {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.site-descriptor::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--neon);
  transform: rotate(45deg);
  flex: 0 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2vw, 1.75rem);
  line-height: 1;
  color: var(--white);
}

.brand-mark {
  background: var(--neon);
  color: var(--ink);
  padding: 4px 8px 4px 10px;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 100%, 6px 100%);
  font-weight: 900;
}

.brand-name {
  color: var(--white);
}

.header-nav-pane {
  display: flex;
  flex-direction: column;
}

.header-utility {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 24px;
  border-bottom: 1px solid var(--line);
}

.header-update {
  font-family: var(--font-data);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.utility-links {
  display: flex;
  gap: 14px;
  font-size: var(--text-xs);
}

.utility-link {
  color: var(--muted);
  transition: color 160ms ease;
}

.utility-link:hover {
  color: var(--neon);
}

.main-nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 18px 12px;
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--white);
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 8px;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transform-origin: left center;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--neon);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--signal);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin: 10px 12px 10px auto;
  background: var(--panel);
  border: 1px solid var(--line);
}

.nav-toggle-box {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--neon);
}

.reading-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--neon) 0%, var(--data-cyan) 50%, var(--signal) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  z-index: 1;
}

.site-footer {
  background: var(--panel);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--neon) 0 20%, var(--signal) 20% 40%, var(--data-cyan) 40% 60%, transparent 60% 100%);
}

.footer-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 56px 32px 32px;
  display: grid;
  grid-template-columns: 1.3fr 2fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-kicker {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--white);
}

.footer-brand-line {
  font-size: var(--text-md);
  color: var(--neon);
  font-weight: 600;
}

.footer-description {
  font-size: var(--text-sm);
  max-width: 34ch;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-list a {
  color: var(--muted);
  font-size: var(--text-sm);
  transition: color 160ms ease;
}

.footer-list a:hover {
  color: var(--neon);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: var(--text-xs);
  line-height: 1.6;
}

.footer-bottom {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 32px 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px 24px;
}

.footer-trust {
  max-width: 720px;
  font-size: var(--text-xs);
  color: var(--muted);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: var(--text-xs);
  align-items: center;
}

.footer-legal a {
  color: var(--muted);
}

.footer-legal a:hover {
  color: var(--neon);
}

.footer-icp {
  color: var(--muted);
}

.footer-copy {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--muted);
}

.container,
.container-narrow {
  margin-inline: auto;
  padding-inline: 24px;
}

.container {
  max-width: 1200px;
}

.container-narrow {
  max-width: 760px;
}

.layout-split {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 40px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 48px 24px;
}

.layout-rail {
  position: sticky;
  top: 100px;
  align-self: start;
  border-right: 1px solid var(--line);
  padding-right: 24px;
}

.layout-content {
  min-width: 0;
}

.section {
  padding-block: 64px;
}

.section-head {
  margin-bottom: 28px;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.section-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--neon);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 4vw, var(--text-3xl));
  line-height: 1.1;
}

.section-description {
  margin-top: 8px;
  color: var(--muted);
  max-width: 60ch;
}

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

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-asym {
  display: grid;
  grid-template-columns: 1.4fr 1fr 0.85fr;
  gap: 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 20px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--data-cyan);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.25);
}

.card-title {
  font-size: var(--text-md);
  margin-bottom: 6px;
}

.card-meta {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.card-body {
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.btn,
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border: 1px solid transparent;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 10px 100%);
  background: var(--elevated);
  color: var(--white);
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

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

.btn-primary {
  background: var(--neon);
  color: var(--ink);
  font-weight: 700;
}

.btn-primary:hover {
  background: #B4E600;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--white);
}

.btn-ghost:hover {
  border-color: var(--neon);
  color: var(--neon);
  background: transparent;
}

.tag,
.tag-alert,
.tag-data,
.tag-milestone {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  line-height: 1.5;
  background: var(--elevated);
  color: var(--white);
  border-left: 3px solid var(--data-cyan);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tag-alert {
  color: var(--signal);
  background: rgba(255, 106, 0, 0.14);
  border-left-color: var(--signal);
}

.tag-data {
  color: var(--data-cyan);
  background: rgba(0, 214, 224, 0.10);
  border-left-color: var(--data-cyan);
}

.tag-milestone {
  color: var(--amber);
  background: rgba(255, 194, 71, 0.12);
  border-left-color: var(--amber);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--muted);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend-key {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--neon);
  transform: rotate(45deg);
  flex: 0 0 auto;
}

.legend-key--signal {
  background: var(--signal);
}

.legend-key--cyan {
  background: var(--data-cyan);
}

.legend-key--amber {
  background: var(--amber);
}

.breadcrumb {
  font-size: var(--text-sm);
  color: var(--muted);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.breadcrumb-link {
  color: var(--muted);
}

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

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: var(--text-sm);
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.data-table td {
  padding: 10px 12px;
  color: var(--white);
  border-bottom: 1px solid var(--line);
}

.data-table tbody tr:hover {
  background: var(--elevated);
}

.media-frame {
  background: var(--panel);
  border: 1px solid var(--line);
  min-height: 180px;
  position: relative;
}

.media-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--panel), var(--elevated));
  color: var(--muted);
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.media-placeholder::before {
  content: "赛事图位 / MATCH VISUAL";
}

.media-caption {
  padding-top: 8px;
  font-size: var(--text-xs);
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

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

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

  .card,
  .btn,
  .btn-primary,
  .btn-ghost,
  .nav-link::after,
  .nav-toggle-box {
    transition-duration: 180ms;
  }
}

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

  .card:hover,
  .btn:hover,
  .btn-primary:hover,
  .btn-ghost:hover {
    transform: none;
  }
}

@media (max-width: 1023px) {
  .header-shell {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    min-height: 0;
  }

  .header-brand-pane {
    flex: 1 1 auto;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 2px;
    padding: 8px 16px;
    border-right: 0;
    background: transparent;
  }

  .site-descriptor {
    font-size: 0.6rem;
  }

  .brand {
    font-size: 1.25rem;
  }

  .brand-mark {
    padding: 2px 6px 2px 8px;
  }

  .header-nav-pane {
    display: none;
    order: 3;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 80;
    background: var(--panel);
    border-top: 1px solid var(--line);
    border-bottom: 2px solid var(--neon);
    box-shadow: 0 16px 28px rgba(0, 0, 0, 0.5);
  }

  .header-nav-pane[data-open] {
    display: flex;
    flex-direction: column;
  }

  .header-utility {
    justify-content: space-between;
    padding: 10px 16px;
  }

  .main-nav {
    width: 100%;
    justify-content: flex-start;
    align-items: stretch;
  }

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

  .nav-link {
    display: block;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    white-space: normal;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    color: var(--neon);
    background: linear-gradient(90deg, rgba(200, 255, 0, 0.08), transparent 60%);
  }

  .nav-toggle {
    display: inline-flex;
    order: 2;
    flex: 0 0 auto;
    margin: 10px 12px 10px auto;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-box:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

  .nav-toggle[aria-expanded="true"] .nav-toggle-box:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-toggle-box {
    transition: transform 160ms ease, opacity 160ms ease;
  }

  .layout-split {
    grid-template-columns: 1fr;
    gap: 16px;
    padding-inline: 16px;
  }

  .layout-rail {
    position: static;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-right: 0;
    padding-bottom: 16px;
  }

  .footer-shell {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px 24px;
  }

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

  .footer-bottom {
    padding: 20px;
  }
}

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-asym {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr 1fr;
  }

  .footer-contact {
    grid-column: 1 / -1;
  }

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

  .footer-trust {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .footer-columns {
    grid-template-columns: 1fr;
  }
}