:root {
  --color-deep-green: #0B3D2E;
  --color-surface-green: #0F4C3A;
  --color-surface-light: #123F31;
  --color-accent-orange: #FF6B35;
  --color-accent-orange-hover: #E65A2B;
  --color-champion-gold: #D4AF37;
  --color-text-primary: #F5F5F5;
  --color-text-secondary: #C4D4C2;
  --color-border-line: #2E5F4A;
  --color-alert-green: #1B5E4B;
  --font-title: Impact, "Noto Sans SC", "Arial Black", sans-serif;
  --font-body: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --radius-card: 20px;
  --radius-chip: 999px;
  --border-width: 1px;
  --header-height: 76px;
  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
  --container-max: 1200px;
  --content-padding: 24px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-deep-green);
  color: var(--color-text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

::selection {
  background-color: var(--color-accent-orange);
  color: #0B2B1F;
}

:focus-visible {
  outline: 3px solid var(--color-accent-orange);
  outline-offset: 2px;
  border-radius: 4px;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

@supports (backdrop-filter: blur(12px)) {
  .site-header {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
}

.container {
  width: min(var(--container-max), 100% - var(--content-padding) * 2);
  margin-left: auto;
  margin-right: auto;
}

.container-footer {
  width: min(1100px, 100% - var(--content-padding) * 2);
  margin-left: auto;
  margin-right: auto;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  background: var(--color-accent-orange);
  color: #061F17;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: var(--radius-chip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 12px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 61, 46, 0.85);
  border-bottom: 1px solid var(--color-accent-orange);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-mark {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-mark-text {
  font-family: var(--font-title);
  font-size: 30px;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  text-transform: uppercase;
}

.brand-mark-text::first-letter {
  color: var(--color-accent-orange);
}

.brand-sub {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--color-border-line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background-color: rgba(255, 107, 53, 0.08);
  position: relative;
  z-index: 1101;
}

.nav-toggle .toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-accent-orange);
  border-radius: 999px;
  transition: transform 200ms ease, opacity 200ms ease, background-color 200ms ease;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--color-accent-orange);
  background-color: rgba(255, 107, 53, 0.15);
}

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

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

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

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-secondary);
  border-radius: 999px;
  position: relative;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 3px;
  background-color: var(--color-accent-orange);
  border-radius: 4px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text-primary);
  background-color: rgba(255, 107, 53, 0.08);
}

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

.nav-link[aria-current="page"] {
  color: var(--color-text-primary);
  background-color: rgba(255, 107, 53, 0.12);
}

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

/* Footer */
.site-footer {
  background: linear-gradient(180deg, #0B3D2E 0%, #082B20 100%);
  border-top: 1px solid var(--color-border-line);
  padding-top: 72px;
  padding-bottom: 32px;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent-orange) 35%, var(--color-champion-gold) 80%, transparent 100%);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 56px;
  padding-bottom: 48px;
}

.footer-brand-name {
  font-family: var(--font-title);
  font-size: 32px;
  letter-spacing: 0.05em;
  line-height: 1;
  margin-bottom: 8px;
}

.footer-brand-name {
  color: var(--color-text-primary);
}

.footer-brand-sub {
  color: var(--color-accent-orange);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 14px;
  margin-bottom: 16px;
}

.footer-brand-desc {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.7;
  max-width: 300px;
}

.footer-heading {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-orange);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 18px;
  font-family: var(--font-mono);
}

.footer-nav-list,
.footer-legal-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-nav-list a,
.footer-legal-list a {
  color: var(--color-text-secondary);
  font-size: 14px;
  position: relative;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-nav-list a::before,
.footer-legal-list a::before {
  content: "/";
  color: var(--color-accent-orange);
  margin-right: 6px;
  opacity: 0.7;
  font-family: var(--font-mono);
}

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

.footer-contact {
  margin-top: 20px;
  font-size: 13px;
  line-height: 2;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.footer-contact a {
  color: var(--color-text-secondary);
  border-bottom: 1px solid transparent;
}

.footer-contact a:hover,
.footer-contact a:focus-visible {
  color: var(--color-accent-orange);
  border-bottom-color: var(--color-accent-orange);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.footer-bottom a {
  color: var(--color-text-secondary);
  border-bottom: 1px solid transparent;
}

.footer-bottom a:hover,
.footer-bottom a:focus-visible {
  color: var(--color-accent-orange);
  border-bottom-color: var(--color-accent-orange);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-accent-orange);
  color: #061F17;
  font-weight: 700;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 999px;
  text-decoration: none;
  transition: background-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-accent-orange-hover);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.25), 0 0 24px rgba(255, 107, 53, 0.2);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: transparent;
  color: var(--color-text-primary);
  font-weight: 600;
  font-size: 15px;
  padding: 11px 22px;
  border-radius: 999px;
  border: 1px solid var(--color-border-line);
  text-decoration: none;
  transition: border-color var(--transition-base), color var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--color-accent-orange);
  color: var(--color-accent-orange);
  background-color: rgba(255, 107, 53, 0.08);
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.08);
}

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 107, 53, 0.15);
  color: var(--color-accent-orange);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 107, 53, 0.3);
}

.tag--gold {
  background-color: rgba(212, 175, 55, 0.12);
  color: var(--color-champion-gold);
  border-color: rgba(212, 175, 55, 0.35);
}

.tag--outline {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border-line);
}

.terminal-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent-orange);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-divider {
  height: 1px;
  background: var(--color-border-line);
  position: relative;
  margin: 24px 0;
}

.section-divider::before {
  content: "";
  position: absolute;
  left: 0;
  top: -2px;
  width: 8px;
  height: 5px;
  background-color: var(--color-accent-orange);
  border-radius: 4px;
  transition: width var(--transition-base);
}

.section-divider:hover::before {
  width: 32px;
}

/* Cards */
.match-card,
.analysis-card {
  background-color: var(--color-surface-green);
  border: 1px solid var(--color-border-line);
  border-radius: var(--radius-card);
  padding: 32px;
  transition: border-color var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base);
  position: relative;
}

.match-card:hover,
.analysis-card:hover {
  border-color: var(--color-accent-orange);
  background-color: #124F39;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

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

.data-value {
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.data-value--orange {
  color: var(--color-accent-orange);
}

.data-value--gold {
  color: var(--color-champion-gold);
}

.data-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Image panel placeholder */
.img-panel {
  background-color: var(--color-surface-green);
  border: 1px solid var(--color-border-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 10;
}

.img-panel::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed var(--color-border-line);
  border-radius: 12px;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 107, 53, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 107, 53, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

.img-panel__inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 13px;
}

/* Page hero */
.page-hero {
  padding: 88px 0 56px;
  position: relative;
  border-bottom: 1px solid var(--color-border-line);
}

.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 240px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-orange), transparent);
}

.page-hero__title {
  font-family: var(--font-title);
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.05;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.page-hero__lead {
  color: var(--color-text-secondary);
  max-width: 560px;
  font-size: 17px;
  line-height: 1.8;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

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

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: transparent;
  z-index: 1500;
  pointer-events: none;
}

.scroll-progress::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: calc(var(--progress, 0) * 1%);
  background: linear-gradient(90deg, var(--color-accent-orange), var(--color-champion-gold));
  transition: width 80ms linear;
}

/* Back to top */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-accent-orange);
  color: #061F17;
  font-size: 22px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border: none;
  cursor: pointer;
  z-index: 800;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-base), transform var(--transition-base), background-color var(--transition-base);
}

.back-top.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.back-top:hover,
.back-top:focus-visible {
  background-color: var(--color-accent-orange-hover);
  box-shadow: 0 4px 24px rgba(255, 107, 53, 0.4);
}

/* Responsive breakpoints */
@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .skip-link {
    left: 8px;
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 64px;
  }

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

  .header-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(11, 61, 46, 0.97);
    border-bottom: 1px solid var(--color-accent-orange);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    z-index: 1099;
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
    max-height: calc(100vh - var(--header-height));
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .nav-link {
    padding: 14px 16px;
    font-size: 16px;
    display: block;
    border-radius: 14px;
    color: var(--color-text-secondary);
  }

  .nav-link::after {
    left: 16px;
    right: auto;
    width: 0;
    height: 100%;
    top: 0;
    bottom: auto;
    border-radius: 14px;
    background-color: transparent;
    border-left: 3px solid var(--color-accent-orange);
    transform: none;
    transition: width var(--transition-base);
  }

  .nav-link:hover::after,
  .nav-link:focus-visible::after,
  .nav-link[aria-current="page"]::after {
    width: 4px;
    transform: none;
  }

  .nav-link[aria-current="page"] {
    background-color: rgba(255, 107, 53, 0.12);
    color: var(--color-accent-orange);
  }

  .brand-mark-text {
    font-size: 26px;
  }

  .brand-sub {
    font-size: 11px;
  }
}

@media (max-width: 640px) {
  :root {
    --content-padding: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }

  .match-card,
  .analysis-card {
    padding: 20px;
  }

  .data-value {
    font-size: 34px;
  }
}

@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;
  }

  html {
    scroll-behavior: auto;
  }
}