/* ==========================================================================
   安博赛场 – ANBO ARENA
   全站共享样式 Site Kit
   ========================================================================== */

/* ---------- Reset & Tokens ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --deep-space-blue: #0B1B3D;
  --neon-green: #39FF14;
  --metal-silver: #C0C0C0;
  --alert-orange: #FF6A00;
  --panel-navy: #0D1B2A;
  --text-light: #E6F0FF;
  --text-muted: #8BA3C7;
  --grid-line: #1E3A5F;
  --danger-red: #FF2A2A;
  --glow: rgba(57, 255, 20, 0.2);

  --font-heading: 'Orbitron', 'Rajdhani', 'Microsoft YaHei', sans-serif;
  --font-body: 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-data: 'JetBrains Mono', 'Consolas', monospace;

  --max-width: 1280px;
  --content-pad: 24px;
  --radius: 4px;
  --transition-base: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-light);
  background-color: var(--deep-space-blue);
  background-image:
    linear-gradient(rgba(30, 58, 95, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 95, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
  min-height: 100vh;
}

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

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

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

/* ---------- 通用辅助 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0;
  left: -999px;
  z-index: 2000;
  display: inline-block;
  padding: 10px 20px;
  background: var(--neon-green);
  color: var(--deep-space-blue);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
  color: var(--deep-space-blue);
  outline: none;
}

/* ---------- 布局基建 ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

.section {
  padding: 56px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-6 { grid-column: span 6; }
.col-span-8 { grid-column: span 8; }
.col-span-12 { grid-column: span 12; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  margin-right: 8px;
  color: var(--grid-line);
}

.breadcrumb-link {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

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

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--deep-space-blue);
  background-image: linear-gradient(180deg, rgba(57, 255, 20, 0.06), transparent 60%);
  border-bottom: 1px solid var(--grid-line);
  box-shadow: 0 3px 0 var(--neon-green);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px 24px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.site-brand {
  text-align: center;
}

.brand-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-light);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.14em;
  color: var(--text-light);
  text-shadow: 0 0 18px rgba(57, 255, 20, 0.35);
}

.brand-sub {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.52em;
  color: var(--neon-green);
  display: block;
  margin-top: 6px;
}

/* ---------- 主导航 ---------- */
.header-nav-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.header-nav {
  width: 100%;
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
  padding: 8px 0;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-light);
  position: relative;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: -2px;
  height: 2px;
  background: var(--neon-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

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

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

.nav-link[aria-current="page"] {
  text-shadow: 0 0 12px var(--glow);
}

/* ---------- 快捷入口 ---------- */
.quick-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.quick-link a {
  display: inline-block;
  padding: 4px 12px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--metal-silver);
  background: var(--panel-navy);
  border: 1px solid var(--grid-line);
  border-radius: 2px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.quick-link a:hover,
.quick-link a:focus-visible {
  color: var(--neon-green);
  border-color: var(--neon-green);
  background: rgba(57, 255, 20, 0.06);
}

/* ---------- 汉堡按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--grid-line);
  border-radius: 2px;
  padding: 8px 12px;
  cursor: pointer;
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 0.82rem;
  transition: border-color 0.2s;
}

.nav-toggle:hover {
  border-color: var(--neon-green);
}

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

.nav-toggle-label {
  font-weight: 600;
}

.nav-icon {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--neon-green);
  position: relative;
  transition: background 0.3s;
}

.nav-icon::before,
.nav-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--neon-green);
  transition: transform 0.3s;
}

.nav-icon::before { top: -6px; }
.nav-icon::after { bottom: -6px; }

.nav-toggle.is-active .nav-icon {
  background: transparent;
}

.nav-toggle.is-active .nav-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-active .nav-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-green) 0%, var(--alert-orange) 100%);
  z-index: 500;
  pointer-events: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: 64px;
  background-color: var(--deep-space-blue);
  border-top: 1px solid var(--grid-line);
  box-shadow: 0 -3px 0 var(--neon-green);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, 0.5), transparent);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 28px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
}

.footer-col {
  margin: 0;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.16em;
  color: var(--text-light);
  margin-bottom: 6px;
  text-shadow: 0 0 12px rgba(57, 255, 20, 0.25);
}

.footer-brand-sub {
  font-family: var(--font-data);
  font-size: 0.66rem;
  letter-spacing: 0.4em;
  color: var(--neon-green);
  margin-bottom: 16px;
  display: block;
}

.footer-brand-brief {
  max-width: 360px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--metal-silver);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--grid-line);
}

.footer-link-list {
  list-style: none;
  columns: 2;
  column-gap: 24px;
}

.footer-link-list li {
  margin-bottom: 8px;
  break-inside: avoid;
}

.footer-link-list a {
  display: inline-block;
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color 0.2s, transform 0.2s;
}

.footer-link-list a:hover,
.footer-link-list a:focus-visible {
  color: var(--neon-green);
  transform: translateX(2px);
}

.footer-contact-line {
  display: flex;
  gap: 4px;
  margin: 0 0 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--grid-line);
  padding-top: 24px;
  margin-top: 8px;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.footer-icp {
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0;
  letter-spacing: 0.05em;
}

.footer-legal {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal a {
  font-size: 0.83rem;
  color: var(--text-muted);
  border-bottom: 1px dotted transparent;
  transition: color 0.2s, border-color 0.2s;
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--neon-green);
  border-color: var(--neon-green);
}

/* ==========================================================================
   通用组件
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: 2px solid transparent;
  border-radius: 2px;
  font-family: var(--font-data);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: var(--neon-green);
  color: var(--deep-space-blue);
  border-color: var(--neon-green);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: transparent;
  color: var(--neon-green);
  box-shadow: 0 0 18px var(--glow);
}

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

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

.card {
  background: var(--panel-navy);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--neon-green);
  box-shadow: 0 4px 24px var(--glow);
  transform: translateY(-2px);
}

.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--metal-silver);
  background: var(--panel-navy);
  border: 1px solid var(--grid-line);
  border-radius: 999px;
  white-space: nowrap;
}

.data-chip-accent {
  color: var(--neon-green);
  border-color: rgba(57, 255, 20, 0.4);
  background: rgba(57, 255, 20, 0.06);
}

.data-chip-alert {
  color: var(--alert-orange);
  border-color: rgba(255, 106, 0, 0.4);
  background: rgba(255, 106, 0, 0.06);
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-light);
  background: rgba(30, 58, 95, 0.6);
  border-left: 2px solid var(--neon-green);
  margin: 0 4px 4px 0;
}

.eyebrow {
  display: block;
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon-green);
}

.section-title {
  margin: 0 0 24px;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--text-light);
}

.muted-text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.data-num {
  font-family: var(--font-data);
  font-size: clamp(1.3rem, 2.2vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--neon-green);
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--panel-navy);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
}

.media-frame--square {
  aspect-ratio: 1 / 1;
}

.media-frame--tall {
  aspect-ratio: 3 / 4;
}

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

.media-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(57, 255, 20, 0.10), transparent 55%);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

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

  .grid {
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .site-header {
    box-shadow: 0 2px 0 var(--neon-green);
  }

  .header-inner {
    padding: 14px 16px 10px;
  }

  .nav-toggle {
    display: inline-flex;
    position: absolute;
    right: 12px;
    top: 16px;
  }

  .header-nav-wrap {
    display: none;
    margin-top: 12px;
    gap: 8px;
  }

  .header-nav-wrap[data-open="true"] {
    display: flex;
    flex-direction: column;
  }

  .header-nav {
    width: 100%;
  }

  .nav-list {
    width: 100%;
    flex-direction: column;
    gap: 0;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    text-align: center;
    font-size: 1rem;
  }

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

  .nav-link[aria-current="page"] {
    background: rgba(57, 255, 20, 0.08);
  }

  .quick-links {
    flex-wrap: wrap;
    gap: 6px;
  }

  .quick-link a {
    padding: 3px 10px;
    font-size: 0.72rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
    gap: 12px;
  }

  .section {
    padding: 40px 0;
  }

  .container {
    padding: 0 16px;
  }

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

  .col-span-3,
  .col-span-4,
  .col-span-6,
  .col-span-8,
  .col-span-12 {
    grid-column: span 1;
  }
}

/* ---------- Reduced Motion ---------- */
@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 {
    transform: none;
  }
}