:root {
  --header-offset: 100px; /* Desktop: header-top (60px) + main-nav (40px) */
  --primary-color: #000000;
  --secondary-color: #FFFFFF;
  --header-top-bg: #1A1A1A; /* Dark grey for header top */
  --main-nav-bg: #FFFFFF; /* White for main nav */
  --footer-bg: #1A1A1A; /* Dark grey for footer */
  --login-btn-bg: #FCBC45;
  --register-btn-bg: #FFFFFF;
}

@media (max-width: 768px) {
  :root {
    --header-offset: 100px; /* Mobile: header-top (50px) + mobile-nav-buttons (50px) */
  }
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  padding-top: var(--header-offset); /* Ensure content is not hidden by fixed header */
}

/* Header Styles */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  display: flex; /* For desktop, header-top and main-nav stack vertically */
  flex-direction: column;
}

.header-top {
  background-color: var(--header-top-bg);
  padding: 15px 0; /* Adjust padding to match offset calculation */
  color: var(--secondary-color); /* White text on dark background */
}

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

.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--secondary-color); /* White for logo text */
  text-decoration: none;
  text-transform: uppercase; /* Ensure logo text is uppercase */
  display: block; /* Ensures it takes up space and aligns */
  white-space: nowrap; /* Prevent logo text from wrapping */
}

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

.btn {
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease, color 0.3s ease;
  white-space: nowrap;
  border: 1px solid transparent; /* For contrast with bg color */
}

.btn-login {
  background-color: var(--login-btn-bg);
  color: var(--primary-color); /* Black text on yellow button */
}

.btn-login:hover {
  background-color: #e0a53b; /* Slightly darker yellow on hover */
}

.btn-register {
  background-color: var(--register-btn-bg);
  color: var(--primary-color); /* Black text on white button */
  border-color: var(--primary-color); /* Border for white button for visibility */
}

.btn-register:hover {
  background-color: #f0f0f0;
  border-color: #666;
}

.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 1001; /* Above mobile buttons and overlay */
}

.hamburger-menu .bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--secondary-color); /* White bars */
  margin: 5px 0;
  transition: all 0.3s ease;
}

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

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

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

.mobile-nav-buttons {
  display: none; /* Hidden on desktop */
  background-color: var(--header-top-bg); /* Same as header-top */
  padding: 10px 0; /* Adjust padding to match offset calculation */
  justify-content: center; /* Center buttons horizontally */
  gap: 12px;
  width: 100%;
}

.mobile-nav-buttons .header-container {
  max-width: none; /* Mobile container should not have max-width */
  width: 100%;
  padding: 0 15px; /* Smaller padding for mobile */
  display: flex;
  justify-content: center; /* Center buttons within its container */
  gap: 12px;
}

.main-nav {
  background-color: var(--main-nav-bg);
  padding: 10px 0; /* Adjust padding to match offset calculation */
  color: var(--primary-color); /* Black text on white background */
  display: flex; /* Desktop: visible, row direction */
  flex-direction: row;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.main-nav .nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap; /* Allow wrapping on smaller desktop screens */
  justify-content: center;
  gap: 25px; /* Spacing between menu items */
}

.main-nav .nav-link {
  color: var(--primary-color); /* Black for nav links */
  text-decoration: none;
  font-weight: bold;
  padding: 5px 0;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.main-nav .nav-link:hover {
  color: #666; /* Darker grey on hover */
}

.mobile-menu-overlay {
  display: none; /* Hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999; /* Below hamburger menu, above content */
}

/* Footer Styles */
.site-footer {
  background-color: var(--footer-bg);
  color: var(--secondary-color); /* White text on dark background */
  padding: 40px 20px 20px;
  font-size: 14px;
}

.site-footer a {
  color: var(--secondary-color); /* White links */
  text-decoration: none;
  transition: color 0.3s ease;
}

.site-footer a:hover {
  color: #aaa;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-columns {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-bottom: 30px;
  gap: 20px; /* Spacing between columns */
}

.footer-column {
  flex: 1;
  min-width: 150px; /* Minimum width for columns before wrapping */
}

.footer-column h3 {
  font-size: 16px;
  margin-bottom: 15px;
  color: var(--login-btn-bg); /* Use a highlight color for headings */
  white-space: nowrap;
}

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mobile styles */
@media (max-width: 768px) {
  body {
    overflow-x: hidden;
  }
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }

  .site-header {
    flex-direction: column; /* Stack header-top and mobile-nav-buttons vertically */
  }

  .header-top {
    padding: 10px 0; /* Smaller padding for mobile */
  }

  .header-container {
    padding: 0 15px; /* Smaller padding for mobile */
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    justify-content: space-between; /* Keeps hamburger left, logo centered */
  }

  .logo {
    flex: 1 !important; /* Allows logo to take space and be centered by justify-content */
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 20px;
  }

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

  .hamburger-menu {
    display: block; /* Show hamburger menu on mobile */
    order: -1; /* Place it to the left */
    color: var(--secondary-color);
  }

  .mobile-nav-buttons {
    display: flex; /* Show mobile buttons below header-top */
    flex-direction: row;
    justify-content: center;
    align-items: center;
    width: 100%;
  }

  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: var(--header-offset); /* Start below the fixed header */
    left: 0;
    width: 80%; /* Menu width */
    height: calc(100% - var(--header-offset)); /* Take full height below header */
    background-color: var(--main-nav-bg); /* White background */
    flex-direction: column;
    align-items: flex-start; /* Align menu items to the left */
    padding: 20px 0; /* Add padding inside the menu */
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Slide out to the left */
    transition: transform 0.3s ease;
    overflow-y: auto; /* Enable scrolling for long menus */
  }

  .main-nav.active {
    display: flex; /* Show menu when active */
    transform: translateX(0); /* Slide in */
  }

  .main-nav .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 20px; /* Padding for menu items */
    gap: 15px; /* Spacing between menu items */
    width: 100%; /* Ensure container takes full width */
    max-width: none; /* Remove max-width on mobile */
  }

  .main-nav .nav-link {
    width: 100%; /* Full width links */
    padding: 10px 0;
    border-bottom: 1px solid #eee; /* Separator for menu items */
  }
  .main-nav .nav-link:last-child {
      border-bottom: none;
  }

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

  .footer-columns {
    flex-direction: column;
    gap: 30px;
  }

  .footer-column {
    min-width: unset;
    flex: none;
    text-align: center;
  }

  .footer-column h3 {
    margin-bottom: 10px;
  }
  .footer-nav {
    align-items: center; /* Center footer links */
  }
}
/* 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;
  }
}