:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --login-button-color: #EA7C07;
  --background-color: #FFFFFF;
  --text-color-dark: #000000;
  --text-color-light: #FFFFFF;
  --header-top-bg: var(--secondary-color); /* White */
  --main-nav-bg: var(--primary-color); /* Light blue */
  --header-offset: 110px; /* Desktop: header-top (60px) + main-nav (50px) */
}

@media (max-width: 768px) {
  :root {
    --header-offset: 105px; /* Mobile: header-top (60px) + mobile-nav-buttons (45px) */
  }
}

/* Base Styles */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding-top: var(--header-offset); /* Apply header offset */
  line-height: 1.6;
  color: var(--text-color-dark);
  background-color: var(--background-color);
  overflow-x: hidden; /* Prevent body overflow on mobile */
}

a {
  text-decoration: none;
  color: inherit;
}

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

/* Shared Container Styles */
.header-container, .nav-container, .footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  box-sizing: border-box;
}

/* Site Header - Fixed Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  background-color: var(--header-top-bg); /* Default desktop header-top bg */
}

/* Header Top Area (Desktop) */
.header-top {
  background-color: var(--header-top-bg);
  min-height: 60px; /* Approximate height for header-top */
  display: flex;
  align-items: center;
}

.header-top .header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap; /* Prevent wrapping */
}

.site-header .logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--text-color-dark);
  padding: 10px 0;
  white-space: nowrap;
}

/* Desktop Navigation Buttons */
.desktop-nav-buttons {
  display: flex; /* Always visible on desktop */
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 5px;
  font-weight: bold;
  text-align: center;
  transition: background-color 0.3s ease, transform 0.2s ease;
  white-space: nowrap;
  text-decoration: none; /* Remove underline for buttons */
}

.btn-register {
  background-color: var(--primary-color);
  color: var(--text-color-light);
}

.btn-register:hover {
  background-color: #1a8fbd; /* Darker shade of primary */
  transform: translateY(-1px);
}

.btn-login {
  background-color: var(--login-button-color);
  color: var(--text-color-light);
}

.btn-login:hover {
  background-color: #c96706; /* Darker shade of login color */
  transform: translateY(-1px);
}

/* Main Navigation Area (Desktop) */
.main-nav {
  background-color: var(--main-nav-bg); /* Primary light blue */
  min-height: 50px; /* Approximate height for main-nav */
  display: flex; /* Default desktop display */
  align-items: center;
}

.main-nav .nav-container {
  display: flex;
  flex-direction: row; /* Desktop horizontal */
  justify-content: center;
  align-items: center;
  gap: 25px;
  padding: 10px 20px;
}

.main-nav .nav-link {
  color: var(--text-color-light);
  font-weight: bold;
  padding: 5px 0;
  position: relative;
  transition: color 0.3s ease;
}

.main-nav .nav-link:hover {
  color: var(--secondary-color); /* Lighter on hover */
  opacity: 0.8;
}

/* Hamburger Menu (Hidden on Desktop) */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
}

.hamburger-icon {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--primary-color); /* Color for hamburger lines */
  position: relative;
  transition: background-color 0.3s ease;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: '';
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--primary-color); /* Color for hamburger lines */
  position: absolute;
  transition: transform 0.3s ease, top 0.3s ease;
}

.hamburger-icon::before {
  top: -8px;
}

.hamburger-icon::after {
  top: 8px;
}

/* Mobile Menu Overlay (Hidden on Desktop) */
.mobile-menu-overlay {
  display: none; /* Hidden on desktop */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Navigation Buttons (Hidden on Desktop) */
.mobile-nav-buttons {
  display: none; /* Hidden on desktop by default */
}

/* Footer Styles */
.site-footer {
  background-color: var(--text-color-dark); /* Dark background for footer */
  color: var(--text-color-light);
  padding: 40px 0 20px;
  font-size: 14px;
}

.footer-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
}

.footer-col {
  flex: 1;
  min-width: 200px;
  max-width: 300px;
}

.footer-logo {
  font-size: 22px;
  font-weight: bold;
  color: var(--primary-color); /* Primary color for footer logo */
  margin-bottom: 15px;
  display: block;
}

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

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

.footer-nav a {
  color: var(--text-color-light);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
}

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

  .header-container, .nav-container, .footer-container {
    width: 100%;
    max-width: none; /* Crucial for mobile to take full width */
    padding-left: 15px;
    padding-right: 15px;
  }

  .site-header {
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
  }

  .header-top {
    min-height: 60px;
  }

  .header-top .header-container {
    justify-content: space-between; /* Hamburger left, Logo center, blank right */
    position: relative; /* For absolute positioning of logo if needed */
  }

  /* Hamburger menu visible on mobile */
  .hamburger-menu {
    display: block;
    order: 1; /* Place on left */
    position: relative;
    z-index: 1001; /* Ensure it's clickable */
  }

  .hamburger-icon {
    background-color: var(--primary-color); /* Make lines visible */
  }
  .hamburger-icon::before,
  .hamburger-icon::after {
    background-color: var(--primary-color);
  }

  .hamburger-menu.active .hamburger-icon {
    background-color: transparent; /* Hide middle bar */
  }

  .hamburger-menu.active .hamburger-icon::before {
    transform: translateY(8px) rotate(45deg);
  }

  .hamburger-menu.active .hamburger-icon::after {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* Mobile Logo Centering (Method 1: Flexbox) */
  .site-header .logo {
    order: 2; /* Place in middle */
    flex: 1 !important; /* Take available space */
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 20px; /* Adjust font size for mobile */
    color: var(--primary-color);
  }

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

  /* Mobile Navigation Buttons */
  .mobile-nav-buttons {
    display: flex !important; /* Always visible on mobile */
    width: 100%; max-width: 100%;
    box-sizing: border-box;
    padding: 10px 15px; /* Adjust padding for mobile */
    overflow: hidden; /* Prevent buttons from overflowing */
    gap: 10px;
    flex-wrap: nowrap; /* Ensure buttons stay in one line */
    background-color: var(--secondary-color); /* Match header-top background */
    box-shadow: 0 2px 5px rgba(0,0,0,0.05); /* Subtle shadow */
  }

  .mobile-nav-buttons .btn {
    flex: 1; min-width: 0;
    max-width: calc(50% - 5px); /* Two buttons with 10px gap */
    box-sizing: border-box;
    padding: 8px 12px; /* Reduced padding */
    font-size: 13px; /* Reduced font size */
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
    height: auto; /* Allow height to adjust for wrapped text */
  }

  /* Main Navigation (Mobile - hidden by default, slides in) */
  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: var(--header-offset); /* Position below fixed header and mobile buttons */
    left: 0;
    width: 80%; /* Sidebar width */
    max-width: 300px;
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: var(--main-nav-bg); /* Primary color */
    flex-direction: column; /* Vertical menu */
    padding: 20px 0;
    box-shadow: 2px 0 5px rgba(0,0,0,0.2);
    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; /* Show when active */
    transform: translateX(0); /* Slide into view */
  }

  .main-nav .nav-container {
    flex-direction: column; /* Vertical links */
    justify-content: flex-start;
    align-items: flex-start;
    gap: 0; /* Remove gap */
  }

  .main-nav .nav-link {
    width: 100%;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-color-light);
  }

  .main-nav .nav-link:last-child {
    border-bottom: none;
  }

  .main-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }

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

  /* Footer Mobile Layout */
  .footer-container {
    flex-direction: column;
    gap: 20px;
    align-items: center;
    text-align: center;
  }

  .footer-col {
    max-width: 100%;
    min-width: unset;
  }

  .footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 20px; /* Space out links horizontally */
  }

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