:root {
  --primary-color: #2F6BFF;
  --secondary-color: #6FA3FF;
  --card-bg: #FFFFFF;
  --background-color: #F4F7FB;
  --text-main: #1F2D3D;
  --border-color: #D6E2FF;
  --glow-color: #A5C4FF;
  --button-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);

  /* Neon specific colors, derived from primary/secondary */
  --neon-primary: #ff00ff; /* Fallback, will be overridden by theme-colors animation */
  --neon-secondary: #00ffff; /* Fallback */
  --neon-accent: #ffff00; /* Fallback */

  /* Header offset based on marquee + header-top + main-nav */
  --header-offset: 166px; /* Desktop: 44(marquee) + 68(top) + 52(nav) + 2 = 166px */
}

/* Base styles for body to ensure padding for fixed header */
body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding-top: var(--header-offset); /* Account for fixed header + marquee */
  background-color: var(--background-color);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden; /* Prevent horizontal scroll from layout issues */
}

/* Animations for dynamic neon colors */
@keyframes rainbow-border {
  0% { border-color: #ff0000; box-shadow: 0 0 10px #ff0000, 0 0 20px #ff0000; }
  16.6% { border-color: #ff8000; box-shadow: 0 0 10px #ff8000, 0 0 20px #ff8000; }
  33.3% { border-color: #ffff00; box-shadow: 0 0 10px #ffff00, 0 0 20px #ffff00; }
  50% { border-color: #00ff00; box-shadow: 0 0 10px #00ff00, 0 0 20px #00ff00; }
  66.6% { border-color: #0000ff; box-shadow: 0 0 10px #0000ff, 0 0 20px #0000ff; }
  83.3% { border-color: #8000ff; box-shadow: 0 0 10px #8000ff, 0 0 20px #8000ff; }
  100% { border-color: #ff0000; box-shadow: 0 0 10px #ff0000, 0 0 20px #ff0000; }
}

@keyframes hue-spin {
  0% { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}

@keyframes alternate-colors {
  0%, 100% { border-color: var(--primary-color); box-shadow: 0 0 10px var(--primary-color), 0 0 20px var(--primary-color); }
  50% { border-color: var(--secondary-color); box-shadow: 0 0 10px var(--secondary-color), 0 0 20px var(--secondary-color); }
}

@keyframes gradient-flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes random-glow {
  0%, 100% { border-color: #ff00ff; box-shadow: 0 0 20px #ff00ff; }
  20% { border-color: #00ffff; box-shadow: 0 0 20px #00ffff; }
  40% { border-color: #ffff00; box-shadow: 0 0 20px #ffff00; }
  60% { border-color: #00ff00; box-shadow: 0 0 20px #00ff00; }
  80% { border-color: #ff0000; box-shadow: 0 0 20px #ff0000; }
}

@keyframes theme-colors {
  0%, 100% {
    border-color: var(--primary-color);
    box-shadow: 
      0 0 10px var(--primary-color),
      0 0 20px var(--primary-color);
  }
  33% {
    border-color: var(--secondary-color);
    box-shadow: 
      0 0 10px var(--secondary-color),
      0 0 20px var(--secondary-color);
  }
  66% {
    border-color: var(--glow-color);
    box-shadow: 
      0 0 10px var(--glow-color),
      0 0 20px var(--glow-color);
  }
}

@keyframes neon-flicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% { opacity: 1; }
  20%, 24%, 55% { opacity: 0.8; }
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 5px currentColor, 0 0 10px currentColor; }
  100% { box-shadow: 0 0 15px currentColor, 0 0 30px currentColor, 0 0 45px currentColor; }
}

@keyframes led-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

@keyframes text-glow-flow {
  0% {
    text-shadow: 
      0 0 5px var(--primary-color),
      0 0 10px var(--primary-color),
      0 0 15px var(--primary-color);
    color: #ffffff;
  }
  50% {
    text-shadow: 
      0 0 5px var(--secondary-color),
      0 0 10px var(--secondary-color),
      0 0 15px var(--secondary-color);
    color: #ffffff;
  }
  100% {
    text-shadow: 
      0 0 5px var(--glow-color),
      0 0 10px var(--glow-color),
      0 0 15px var(--glow-color);
    color: #ffffff;
  }
}

/* Marquee Section Styles (MUST be neon) */
.marquee-section {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 44px; /* Desktop height */
  box-sizing: border-box;
  background: linear-gradient(135deg, #0a0a0a, #1a1a2e, #16213e); /* Dark background */
  color: #ffffff;
  overflow: hidden;
  border-bottom: 2px solid;
  animation: theme-colors 4s ease-in-out infinite; /* Dynamic color border */
  box-shadow: 
    0 0 10px var(--primary-color),
    0 0 20px var(--primary-color),
    0 0 30px var(--primary-color),
    inset 0 0 20px rgba(47, 107, 255, 0.1);
  z-index: 1001; /* Above header */
}

.marquee-container {
  width: 100%;
  max-width: 100%;
  height: 100%;
  margin: 0 auto;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 0 20px;
  box-sizing: border-box;
}

.marquee-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  z-index: 2;
  position: relative;
}

.marquee-icon-emoji {
  font-size: 24px;
  display: inline-block;
  animation: marquee-pulse 2s ease-in-out infinite, text-glow-flow 3s ease-in-out infinite alternate;
  text-shadow: 
    0 0 5px var(--primary-color),
    0 0 10px var(--primary-color),
    0 0 15px var(--primary-color);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

@keyframes marquee-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.9; }
}

.marquee-wrapper {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.marquee-content {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  animation: marquee-scroll 30s linear infinite;
  gap: 30px;
}

.marquee-text {
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  text-decoration: none;
  text-shadow: 
    0 0 5px var(--primary-color),
    0 0 10px var(--primary-color),
    0 0 15px var(--primary-color);
  line-height: 1.5;
  display: inline-block;
  vertical-align: middle;
  animation: text-glow-flow 3s ease-in-out infinite alternate;
  cursor: pointer;
  transition: all 0.3s ease;
}

.marquee-text:hover {
  text-shadow: 
    0 0 10px var(--primary-color),
    0 0 20px var(--primary-color),
    0 0 30px var(--primary-color),
    0 0 40px var(--primary-color);
  transform: scale(1.05);
  color: #ffffff;
}

.marquee-separator {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.6);
  margin: 0 15px;
  text-shadow: 
    0 0 3px var(--primary-color),
    0 0 6px var(--primary-color);
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Header Section Styles (MUST be neon, fixed) */
.site-header {
  position: fixed;
  top: 44px; /* Below marquee */
  left: 0;
  width: 100%;
  z-index: 1000; /* Below marquee, above content */
  background: linear-gradient(135deg, #0a0a0a, #1a1a2e, #16213e); /* Dark background */
  box-sizing: border-box;
}

.header-top {
  min-height: 68px; /* Desktop height */
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 2px solid;
  animation: theme-colors 4s ease-in-out infinite; /* Dynamic color border */
  box-shadow: 
    0 0 10px var(--primary-color),
    0 0 20px var(--primary-color),
    0 0 30px var(--primary-color),
    inset 0 0 20px rgba(47, 107, 255, 0.1);
  background: linear-gradient(135deg, #0a0a0a, #1a1a2e, #16213e);
}

.header-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: #ffffff; /* Regular color, NOT neon */
  text-decoration: none;
  /* NO neon effects for LOGO */
  display: flex; /* Ensure flex for potential image logo centering */
  align-items: center;
  justify-content: flex-start;
}
.logo img {
  display: block;
  max-height: 60px; /* Max height for desktop logo */
  height: auto;
  width: auto;
  max-width: 280px;
  object-fit: contain;
}

/* Hamburger menu for mobile (hidden on desktop) */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  cursor: pointer;
  padding: 5px;
  box-sizing: content-box;
  position: relative;
  z-index: 1002; /* Above mobile menu */
}
.hamburger-menu .bar {
  width: 100%;
  height: 3px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: all 0.3s ease;
  /* Neon glow for hamburger bars */
  box-shadow: 
    0 0 5px var(--primary-color),
    0 0 10px var(--primary-color);
}
.hamburger-menu.active .bar:nth-child(1) { transform: translateY(11px) rotate(45deg); }
.hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
.hamburger-menu.active .bar:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }

/* Desktop navigation buttons (visible on desktop, hidden on mobile) */
.desktop-nav-buttons {
  display: flex;
  gap: 15px;
  align-items: center;
}

/* Mobile navigation buttons (hidden on desktop, visible on mobile) */
.mobile-nav-buttons {
  display: none; /* Hidden on desktop */
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}