/* ============================================================
   安博电竞娱乐 · 全站共享样式
   文件：/assets/site.css
   风格：数据观测站 / 赛博电竞 / 精密网格
   ============================================================ */

/* ---------- 1. Reset & Tokens ---------- */

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

:root {
  --bg-deep: #0A0E17;
  --bg-panel: #121A2C;
  --bg-float: #0D1520;
  --neon-blue: #00D4FF;
  --neon-purple: #9B59FF;
  --neon-green: #39FF14;
  --text-main: #F2F7FF;
  --text-dim: #A3B3CC;
  --grid-line: #1E2A3A;
  --font-display: "Orbitron", "Rajdhani", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --header-h: 64px;
  --content-max: 1200px;
  --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-panel: 0 8px 32px rgba(0, 0, 0, 0.45);
  --glow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
}

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(ellipse at 18% -5%, rgba(0, 212, 255, 0.07), transparent 50%),
    radial-gradient(ellipse at 85% 5%, rgba(155, 89, 255, 0.06), transparent 50%),
    linear-gradient(rgba(30, 42, 58, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 58, 0.3) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  background-attachment: fixed, fixed, scroll, scroll;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--text-main);
}

ul,
ol {
  list-style: none;
}

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

h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
}

h1 {
  font-size: clamp(32px, 5vw, 52px);
}

h2 {
  font-size: clamp(24px, 3vw, 32px);
}

h3 {
  font-size: 20px;
}

p {
  color: var(--text-main);
}

::selection {
  background: rgba(0, 212, 255, 0.3);
  color: #fff;
}

/* ---------- 2. Layout Utilities ---------- */

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section-pad {
  padding: 96px 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.section-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-main);
  position: relative;
  padding-left: 16px;
  margin-bottom: 12px;
  line-height: 1.2;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: linear-gradient(180deg, var(--neon-blue), var(--neon-purple));
  box-shadow: var(--glow-blue);
}

.section-sub {
  color: var(--text-dim);
  font-size: 16px;
  margin-bottom: 40px;
  max-width: 560px;
}

.page-hero {
  padding: 48px 0 56px;
  position: relative;
  border-bottom: 1px solid var(--grid-line);
  margin-bottom: 48px;
}

.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 220px;
  background: linear-gradient(90deg, var(--neon-blue), transparent);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

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

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

.breadcrumb-sep {
  color: var(--grid-line);
}

/* ---------- 3. Shared Components ---------- */

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: filter var(--transition), background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  color: #0A0E17;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.btn-primary:hover {
  filter: brightness(1.15) drop-shadow(0 0 10px rgba(0, 212, 255, 0.55));
  color: #0A0E17;
  transform: translateY(-1px);
}

.btn-ghost {
  position: relative;
  border: 1px solid var(--grid-line);
  background: transparent;
  color: var(--text-dim);
}

.btn-ghost::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--neon-blue);
  border-left: 1px solid var(--neon-blue);
}

.btn-ghost:hover {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.05);
}

.data-card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  padding: 24px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.data-card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 24px;
  height: 24px;
  border-top: 2px solid var(--neon-blue);
  border-left: 2px solid var(--neon-blue);
  opacity: 0;
  transition: opacity var(--transition);
}

.data-card:hover {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: var(--glow-blue), var(--shadow-panel);
  transform: translateY(-2px);
}

.data-card:hover::after {
  opacity: 1;
}

.data-card-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--neon-green);
  line-height: 1;
  margin-bottom: 8px;
  text-shadow: 0 0 12px rgba(57, 255, 20, 0.35);
}

.data-card-label {
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.img-frame {
  position: relative;
  border: 1px solid var(--grid-line);
  background:
    linear-gradient(135deg, rgba(0, 212, 255, 0.04), rgba(155, 89, 255, 0.04)),
    var(--bg-panel);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.img-frame:hover img {
  transform: scale(1.03);
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(0, 212, 255, 0.15);
  pointer-events: none;
}

.prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  max-width: 720px;
}

.prose p {
  margin-bottom: 20px;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 24px;
  margin: 40px 0 16px;
  color: var(--text-main);
  border-left: 3px solid var(--neon-blue);
  padding-left: 14px;
}

.prose ul {
  margin: 0 0 20px;
}

.prose ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 2px;
  background: var(--neon-blue);
}

/* ---------- 4. Header ---------- */

.skip-link {
  position: fixed;
  top: -100%;
  left: 16px;
  z-index: 999;
  padding: 10px 20px;
  background: var(--neon-blue);
  color: #0A0E17;
  font-weight: 600;
  font-size: 14px;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 16px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple), var(--neon-green));
  transform-origin: left center;
  transform: scaleX(0);
  z-index: 300;
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  padding: 16px 24px 10px;
  background: linear-gradient(180deg, rgba(10, 14, 23, 0.85), rgba(10, 14, 23, 0.4) 80%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: calc(var(--content-max) + 48px);
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0 16px 0 24px;
  background: rgba(18, 26, 44, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--grid-line);
  border-bottom-color: rgba(0, 212, 255, 0.35);
  box-shadow: var(--shadow-panel);
}

.header-inner::before,
.header-inner::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  pointer-events: none;
}

.header-inner::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--neon-blue);
  border-left: 2px solid var(--neon-blue);
}

.header-inner::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--neon-green);
  border-right: 2px solid var(--neon-green);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-main);
  flex-shrink: 0;
}

.brand-logo:hover {
  color: var(--text-main);
}

.brand-mark {
  display: block;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  clip-path: polygon(0 0, 100% 6%, 70% 100%, 18% 82%);
  box-shadow: var(--glow-blue);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-main);
  text-shadow: 0 0 8px rgba(0, 212, 255, 0.3);
}

.brand-sub {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-pill {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-pill ul {
  display: flex;
  gap: 2px;
  padding: 4px;
  background: rgba(10, 14, 23, 0.75);
  border: 1px solid var(--grid-line);
  border-radius: 999px;
}

.nav-pill a {
  display: block;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-dim);
  white-space: nowrap;
  transition: color var(--transition), background var(--transition), box-shadow var(--transition);
}

.nav-pill a:hover {
  color: var(--text-main);
  background: rgba(0, 212, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.25);
}

.nav-pill a[aria-current="page"] {
  color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.55);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-return {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  color: #0A0E17;
  white-space: nowrap;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  transition: filter var(--transition), transform var(--transition);
}

.btn-return:hover {
  filter: brightness(1.15) drop-shadow(0 0 8px rgba(0, 212, 255, 0.6));
  color: #0A0E17;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--grid-line);
  background: rgba(10, 14, 23, 0.8);
  transition: border-color var(--transition), background var(--transition);
}

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

.nav-toggle-line {
  width: 18px;
  height: 2px;
  background: var(--text-main);
  transition: transform 0.3s ease, opacity 0.2s ease, background 0.3s ease;
}

/* ---------- 5. Footer ---------- */

.site-footer {
  border-top: 1px solid var(--grid-line);
  background: linear-gradient(180deg, var(--bg-deep) 0%, #070B12 100%);
  padding-top: 48px;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple), var(--neon-green));
  opacity: 0.6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand .brand-logo {
  margin-bottom: 16px;
}

.footer-brand-desc {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
  max-width: 420px;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-main);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--neon-blue);
}

.footer-links ul li {
  margin-bottom: 8px;
}

.footer-links ul a {
  color: var(--text-dim);
  font-size: 14px;
  transition: color var(--transition), padding-left var(--transition);
}

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

.footer-contact p {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 8px;
}

.footer-bottom {
  border-top: 1px solid var(--grid-line);
  padding: 16px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

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

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

.footer-legal-sep {
  color: var(--grid-line);
}

.footer-copy,
.footer-icp {
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- 6. Focus & Motion ---------- */

:focus-visible {
  outline: 2px solid var(--neon-blue);
  outline-offset: 3px;
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ---------- 7. Responsive ---------- */

@media (max-width: 1023px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  body {
    background-attachment: scroll, scroll, scroll, scroll;
  }

  .container {
    padding: 0 16px;
  }

  .section-pad {
    padding: 64px 0;
  }

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

  .site-header {
    padding: 10px 12px 8px;
  }

  .header-inner {
    min-height: 54px;
    padding: 0 6px 0 14px;
    gap: 8px;
  }

  .brand-mark {
    width: 26px;
    height: 26px;
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-sub {
    font-size: 8px;
  }

  .nav-pill {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    z-index: 250;
    background: var(--bg-panel);
    border: 1px solid var(--grid-line);
    border-top: 2px solid var(--neon-blue);
    padding: 12px;
    box-shadow: var(--shadow-panel);
  }

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

  .nav-pill ul {
    flex-direction: column;
    gap: 4px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0;
  }

  .nav-pill a {
    border-radius: 2px;
    padding: 12px 14px;
    font-size: 15px;
    white-space: normal;
    border-left: 2px solid transparent;
  }

  .nav-pill a[aria-current="page"] {
    border-left-color: var(--neon-blue);
    background: rgba(0, 212, 255, 0.1);
  }

  .header-actions {
    gap: 6px;
  }

  .btn-return {
    padding: 7px 12px;
    font-size: 12px;
  }

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

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

  .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(-7px) rotate(-45deg);
    background: var(--neon-blue);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .footer-legal {
    justify-content: center;
    flex-wrap: wrap;
  }

  .page-hero {
    padding: 32px 0 40px;
    margin-bottom: 32px;
  }
}

@media (max-width: 420px) {
  .btn-return {
    padding: 6px 10px;
    font-size: 11px;
  }

  .brand-logo {
    gap: 8px;
  }

  .brand-name {
    font-size: 16px;
  }
}