:root {
  --primary-color: #000000;
  --secondary-color: #FFFFFF;
  --accent-color: #FCBC45; /* For login button */
  --header-offset: 110px; /* Desktop: header-top (~60px) + main-nav (~50px) */
}

@media (max-width: 768px) {
  :root {
    --header-offset: 110px; /* Mobile: header-top (~60px) + mobile-nav-buttons (~50px) */
  }
}

/* Global Styles for Header and Footer */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  padding-top: var(--header-offset); /* Apply header offset to body */
  overflow-x: hidden; /* Prevent horizontal scroll on body */
}

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

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Site Header */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5); /* Suspended effect */
  background-color: var(--primary-color); /* Fallback, specific sections will override */
  min-height: var(--header-offset); /* Ensure header has minimum height */
  display: flex;
  flex-direction: column; /* Desktop default is column for header-top and main-nav stacking */
}

.header-top {
  background-color: var(--primary-color); /* Darkest for top bar */
  width: 100%;
  padding: 15px 0; /* Approx 60px height with content */
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px; /* Spacing from container edges */
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--secondary-color);
  text-transform: uppercase; /* Ensure logo text is uppercase */
  display: inline-block; /* Default for text logo */
}

.desktop-nav-buttons {
  display: flex; /* Visible on desktop */
  gap: 12px;
}

.btn {
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: bold;
  text-decoration: none; /* Remove underline for buttons */
  transition: background-color 0.3s ease, color 0.3s ease;
  white-space: nowrap; /* Prevent button text from wrapping */
  text-align: center;
}

.btn-login {
  background-color: var(--accent-color); /* Login button color */
  color: var(--primary-color); /* Text color for login button */
  border: 2px solid var(--accent-color);
}

.btn-login:hover {
  filter: brightness(0.9); /* Simpler hover effect */
}

.btn-register {
  background-color: var(--secondary-color); /* Register button color */
  color: var(--primary-color); /* Text color for register button */
  border: 2px solid var(--secondary-color);
}

.btn-register:hover {
  filter: brightness(0.9); /* Simpler hover effect */
}

.main-nav {
  background-color: #1a1a1a; /* Slightly lighter black for contrast */
  width: 100%;
  padding: 10px 0; /* Approx 50px height with content */
  display: flex; /* Desktop default: visible */
  flex-direction: row; /* Desktop default: horizontal */
  justify-content: center; /* Center menu items */
  align-items: center;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row; /* Desktop default: horizontal */
  justify-content: center;
  align-items: center;
  padding: 0 20px;
  flex-wrap: wrap; /* Allow wrapping if many links */
}

.nav-link {
  color: var(--secondary-color);
  padding: 10px 15px;
  font-size: 16px;
  transition: color 0.3s ease, background-color 0.3s ease;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-color);
}

.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 24px;
  position: relative;
  z-index: 1001; /* Above other mobile elements */
}

.hamburger-menu .bar {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--secondary-color);
  border-radius: 3px;
  margin: 5px 0;
  transition: all 0.3s ease;
}

.hamburger-menu.active .bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-menu.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger-menu.active .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav-buttons {
  display: none; /* Hidden on desktop */
}

.mobile-menu-overlay {
  display: none; /* Hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 999;
  cursor: pointer;
}

/* Site Footer */
.site-footer {
  background-color: var(--primary-color);
  color: var(--secondary-color);
  padding: 40px 20px 20px;
  font-size: 14px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
  padding-bottom: 30px;
}

.footer-col {
  flex: 1;
  min-width: 200px;
}

.footer-col h3 {
  color: var(--secondary-color);
  font-size: 18px;
  margin-bottom: 15px;
}

.footer-col p {
  line-height: 1.6;
  color: #cccccc; /* Slightly lighter text for readability */
}

.footer-nav ul {
  list-style: none;
  padding: 0;
}

.footer-nav li {
  margin-bottom: 10px;
}

.footer-nav a {
  color: #cccccc;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #333333;
  color: #cccccc;
}

/* Mobile Specific Styles */
@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;
  }

  .site-header {
    flex-direction: column; /* Stack header elements */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3); /* Lighter shadow for mobile */
    min-height: var(--header-offset);
  }

  .header-top {
    padding: 15px; /* Adjust padding for mobile */
  }

  .header-container {
    width: 100%;
    max-width: none; /* Important: no max-width on mobile container */
    padding: 0 15px; /* Smaller padding */
    justify-content: space-between; /* Space between hamburger and logo */
  }

  .hamburger-menu {
    display: block; /* Visible on mobile */
    order: 1; /* Left side */
  }

  .logo {
    order: 2; /* Center */
    flex: 1 !important; /* Image LOGO centering */
    display: flex !important; /* Image LOGO centering */
    justify-content: center !important; /* Image LOGO centering */
    align-items: center !important; /* Image LOGO centering */
    font-size: 24px; /* Adjust logo size for mobile */
    text-align: center; /* For text logo */
  }
  .logo img {
    display: block !important;
    max-width: 100%;
    height: auto;
    max-height: 40px;
  }

  .desktop-nav-buttons {
    display: none; /* Hidden on mobile */
  }

  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: var(--header-offset); /* Position below header content */
    left: 0;
    width: 280px; /* Sidebar width */
    height: calc(100vh - var(--header-offset)); /* Full height below header */
    background-color: var(--primary-color);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: 20px 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    transform: translateX(-100%); /* Slide out of view */
    transition: transform 0.3s ease;
    overflow-y: auto; /* Enable scrolling for long menus */
  }

  .main-nav.active {
    display: flex !important; /* MUST be flex for active state */
    transform: translateX(0); /* Slide into view */
  }

  .nav-container {
    width: 100%;
    max-width: none; /* Important: no max-width on mobile container */
    flex-direction: column;
    align-items: flex-start;
    padding: 0 15px;
  }

  .nav-link {
    width: 100%;
    padding: 12px 15px;
    border-bottom: 1px solid #333333;
    font-size: 18px;
  }
  .nav-link:last-child {
    border-bottom: none;
  }

  .mobile-nav-buttons {
    display: flex; /* Visible on mobile */
    justify-content: center;
    gap: 10px;
    width: 100%;
    background-color: #1a1a1a; /* Background for mobile buttons, distinct from header-top */
    padding: 10px 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    min-height: 50px; /* To match offset calculation */
  }

  .mobile-nav-buttons .btn {
    flex: 1; /* Distribute buttons evenly */
    text-align: center;
    font-size: 14px;
    padding: 8px 15px;
  }

  .mobile-menu-overlay.active {
    display: block; /* Show overlay when menu is active */
  }

  .footer-container {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-col {
    min-width: unset;
  }

  .footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 20px;
    margin-top: 10px;
  }

  .footer-nav li {
    margin-bottom: 0;
  }
}

/* Prevent body scroll when mobile menu is open */
body.no-scroll {
  overflow: hidden;
}
/* Payment Methods 图标容器样式 */
.payment-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 5px;
}

.payment-icons img,
.payment-icon {
  max-height: 50px;
  height: auto;
  width: auto;
  display: block;
}

/* Game Providers 图标容器样式 */
.game-providers-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

.game-providers-icons img,
.game-provider-icon {
  max-height: 50px;
  height: auto;
  width: auto;
  display: block;
}

/* Social Media 图标容器样式 */
.social-media-icons {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

.social-media-icons img,
.social-media-icon {
  max-height: 50px;
  height: auto;
  width: auto;
  display: block;
}
/* 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;
  }
}