:root {
  --color-gold: #E8B84B;
  --color-gold-light: #F5D582;
  --color-dark: #0A0A0A;
  --color-panel: #141414;
  --color-red: #C0392B;
  --color-red-light: #E74C3C;
  --color-text: #F5F0E6;
  --color-text-secondary: #B3A98A;
  --color-border: #7A5C2E;
  --gradient-hero: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
  --gradient-card: linear-gradient(145deg, #141414 0%, #1c1c1c 100%);
  --font-display: "Playfair Display", "Songti SC", "STSong", serif;
  --font-impact: Impact, "Oswald", "Arial Narrow", sans-serif;
  --font-body: Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --sidebar-width: 280px;
  --header-height: 64px;
  --container-width: 1200px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-dark);
  background-image:
    radial-gradient(circle at 12% 20%, rgba(232, 184, 75, 0.08), transparent 28%),
    radial-gradient(circle at 88% 0%, rgba(192, 57, 43, 0.06), transparent 32%),
    linear-gradient(180deg, #0A0A0A 0%, #0d0d0d 100%);
  background-attachment: fixed;
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  padding-left: 1.25em;
}

a {
  color: var(--color-gold);
  text-decoration: none;
}

a:hover {
  color: var(--color-gold-light);
}

button, input, textarea, select {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(232, 184, 75, 0.35);
  color: #fff;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-gold-light);
  outline-offset: 3px;
}

#main-content {
  min-height: 60vh;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.page {
  padding: clamp(48px, 8vw, 96px) 0;
}

.section {
  margin-top: clamp(56px, 8vw, 96px);
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 36px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-impact);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-red-light);
}

.section-kicker::before {
  content: "";
  width: 36px;
  height: 2px;
  background: var(--color-gold);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.lede {
  max-width: 62ch;
  font-size: 1.05rem;
  color: var(--color-text-secondary);
}

.page-head {
  margin-bottom: 40px;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 1.05;
  margin: 10px 0 16px;
}

.page-intro {
  max-width: 60ch;
  font-size: 1.05rem;
  color: var(--color-text-secondary);
}

.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));
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  font-family: var(--font-impact);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  line-height: 1;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background 0.3s, border-color 0.3s, transform 0.2s;
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), #d4a63c);
  color: #0A0A0A;
  border-color: var(--color-gold-light);
}

.btn-gold:hover {
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  color: #0A0A0A;
  transform: translateX(4px);
}

.btn-red {
  background: linear-gradient(135deg, var(--color-red), #8f241b);
  color: #fff;
  border-color: var(--color-red-light);
}

.btn-red:hover {
  background: linear-gradient(135deg, var(--color-red-light), var(--color-red));
  color: #fff;
  transform: translateX(4px);
}

.btn:focus-visible {
  outline-offset: -4px;
}

.card {
  position: relative;
  padding: 28px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: border-color 0.3s, transform 0.3s;
}

.card:hover {
  border-color: var(--color-gold);
  transform: translateY(-4px);
}

.card-title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: 1.4rem;
  line-height: 1.2;
}

.card-text {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  color: var(--color-gold);
  font-weight: 700;
}

.card-link::after {
  content: "→";
  transition: transform 0.3s;
}

.card-link:hover::after {
  transform: translateX(4px);
}

.panel {
  padding: 24px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tag-gold {
  border-color: rgba(232, 184, 75, 0.6);
  color: var(--color-gold);
}

.tag-red {
  border-color: rgba(231, 76, 60, 0.6);
  color: var(--color-red-light);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 0;
  margin: 0 0 28px;
  list-style: none;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-border);
}

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

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

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

.media-frame {
  position: relative;
  isolation: isolate;
  min-height: 220px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(145deg, #1a1a1a 0%, #0a0a0a 100%);
  border: 1px solid var(--color-border);
}

.media-frame::after {
  content: "雷火电竞";
  position: absolute;
  left: 16px;
  bottom: 10px;
  z-index: 0;
  font-family: var(--font-impact);
  font-size: clamp(1.2rem, 3vw, 2rem);
  letter-spacing: 0.06em;
  color: rgba(232, 184, 75, 0.25);
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 24px;
  z-index: 3000;
  padding: 10px 16px;
  background: var(--color-gold);
  color: #0A0A0A;
  font-weight: 700;
  transform: translateY(-320%);
  transition: transform 0.2s;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 3001;
  background: linear-gradient(90deg, var(--color-gold), var(--color-red-light));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at 30% 8%, rgba(232, 184, 75, 0.1), transparent 34%),
    linear-gradient(180deg, #141414 0%, #0A0A0A 80%);
  border-right: 1px solid var(--color-border);
  overflow: hidden;
}

.site-header::before {
  content: "";
  position: absolute;
  top: 86px;
  right: -78px;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(232, 184, 75, 0.14);
  transform: rotate(45deg);
  pointer-events: none;
}

.site-header::after {
  content: "雷火";
  position: absolute;
  writing-mode: vertical-rl;
  right: 18px;
  bottom: 26px;
  font-family: var(--font-impact);
  font-size: 64px;
  line-height: 1;
  letter-spacing: 0.12em;
  color: rgba(232, 184, 75, 0.045);
  pointer-events: none;
}

.header-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 36px 24px 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--color-text);
}

.brand:hover {
  color: var(--color-gold);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-gold);
  background: linear-gradient(145deg, rgba(232, 184, 75, 0.18), rgba(232, 184, 75, 0.02));
  color: var(--color-gold);
  font-family: var(--font-impact);
  font-size: 1.5rem;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name {
  display: block;
  font-family: var(--font-impact);
  font-size: 1.28rem;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.brand-slogan {
  display: block;
  margin-top: 5px;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.nav-toggle {
  display: none;
}

.site-nav {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  margin-top: 52px;
  overflow-y: auto;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 12px 12px 14px;
  border-left: 2px solid transparent;
  background: linear-gradient(90deg, transparent, transparent);
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  transition: color 0.3s, border-color 0.3s, background 0.3s;
}

.nav-link::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity 0.3s;
}

.nav-link:hover {
  color: var(--color-text);
  border-left-color: var(--color-gold);
  background: linear-gradient(90deg, rgba(232, 184, 75, 0.12), transparent 85%);
}

.nav-link:hover::before {
  opacity: 1;
}

.nav-link[aria-current="page"] {
  color: var(--color-gold);
  border-left-color: var(--color-red);
  background: linear-gradient(90deg, rgba(192, 57, 43, 0.16), transparent 85%);
}

.nav-link[aria-current="page"]::before {
  opacity: 1;
  background: var(--color-red);
}

.nav-foot {
  margin-top: auto;
  padding-top: 44px;
}

.nav-slogan {
  margin: 0 0 16px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-secondary);
}

.site-footer {
  position: relative;
  margin-top: 80px;
  background: linear-gradient(180deg, #0d0d0d 0%, #0A0A0A 80%);
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 180px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-red));
}

.footer-shell {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 56px 24px 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
}

.footer-logo {
  font-family: var(--font-impact);
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  color: var(--color-gold);
}

.footer-logo:hover {
  color: var(--color-gold-light);
}

.footer-about {
  max-width: 340px;
  margin: 12px 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-trust {
  max-width: 380px;
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--color-red);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.footer-title {
  margin: 0 0 16px;
  font-family: var(--font-impact);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  transition: color 0.3s, padding-left 0.3s;
}

.footer-links a:hover {
  color: var(--color-gold);
  padding-left: 4px;
}

.footer-email,
.footer-phone,
.footer-address {
  display: grid;
  grid-template-columns: 3.5em 1fr;
  gap: 8px;
  margin: 10px 0;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

.footer-email span:first-child,
.footer-phone span:first-child,
.footer-address span:first-child {
  color: var(--color-gold);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid rgba(122, 92, 46, 0.4);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 32px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  line-height: 1;
  transition: color 0.3s, border-color 0.3s, background 0.3s;
}

.filter-btn:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.filter-btn[aria-pressed="true"] {
  background: linear-gradient(135deg, var(--color-red), #9f2e22);
  border-color: var(--color-red-light);
  color: #fff;
}

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

.filter-item {
  min-width: 0;
}

.filter-item.is-hidden {
  display: none;
}

@media (min-width: 901px) {
  body {
    padding-left: var(--sidebar-width);
  }
}

@media (max-width: 1200px) and (min-width: 901px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 992px) {
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  body {
    padding-left: 0;
  }

  #main-content {
    padding-top: calc(var(--header-height) + 12px);
  }

  .site-header {
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    min-height: var(--header-height);
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
    background: rgba(10, 10, 10, 0.96);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    overflow: visible;
  }

  .site-header::before,
  .site-header::after {
    display: none;
  }

  .header-inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    height: auto;
    padding: 10px 20px;
  }

  .brand {
    margin-right: auto;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 1.25rem;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    color: var(--color-text);
  }

  .nav-toggle-bars {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    width: 16px;
  }

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

  .site-header[data-open] .nav-toggle-bars span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-header[data-open] .nav-toggle-bars span:nth-child(2) {
    opacity: 0;
  }

  .site-header[data-open] .nav-toggle-bars span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .nav-toggle-label {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 10;
    margin-top: 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    border-bottom: 1px solid transparent;
    background: rgba(12, 12, 12, 0.98);
    pointer-events: none;
    transition: max-height 0.4s var(--ease), opacity 0.3s, visibility 0.3s, border-color 0.3s;
  }

  .site-header[data-open] .site-nav {
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    visibility: visible;
    opacity: 1;
    border-bottom-color: var(--color-border);
    pointer-events: auto;
  }

  .nav-list {
    gap: 0;
    padding: 10px 18px;
  }

  .nav-link {
    border-left: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-foot {
    padding: 14px 18px 24px;
  }
}

@media (max-width: 720px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-brand {
    grid-column: auto;
  }

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

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

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

  .scroll-progress {
    display: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}