:root {
  --header-offset: 120px; /* Desktop: Total height of header + button area not exceeding this value */
  --primary-color: #0A1931;
  --secondary-color: #FFD700;
  --dark-background: #050F1E; /* Darker for header-top */
  --light-text: #F0F0F0;
  --dark-text: #0A1931;
}

@media (max-width: 768px) {
  :root {
    --header-offset: 200px; /* Mobile: Total height of marquee/header/button area not exceeding this value */
  }
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding-top: var(--header-offset); /* Apply header offset to body */
  background-color: #f4f7f6; /* Light background for content */
  color: #333;
  overflow-x: hidden; /* Prevent horizontal scroll for the whole page */
}

body.no-scroll {
  overflow: hidden;
}

/* --- General Button Styles --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  border: none;
  font-size: 1rem;
}

.btn-register {
  background-color: var(--secondary-color); /* Gold */
  color: var(--dark-text); /* Dark blue text for contrast */
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}
.btn-register:hover {
  background-color: #e0b800; /* Darker gold */
  box-shadow: 0 6px 20px rgba(255, 215, 0, 0.6);
}

.btn-login {
  background-color: var(--primary-color); /* Dark blue */
  color: var(--secondary-color); /* Gold text */
  border: 2px solid var(--secondary-color);
}
.btn-login:hover {
  background-color: #1A2B45; /* Slightly lighter blue */
  color: #FFF;
}

.btn-download {
  background-color: #4CAF50; /* Green for download */
  color: #FFFFFF;
  box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
}
.btn-download:hover {
  background-color: #45a049;
  box-shadow: 0 6px 20px rgba(76, 175, 80, 0.6);
}


/* --- Site Header --- */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  min-height: 60px; /* Minimum height for header-top */
  display: flex;
  flex-direction: column; /* Stack header-top and mobile-buttons-area and main-nav vertically */
}

.header-top {
  background-color: var(--dark-background); /* Very dark blue/black */
  color: var(--light-text);
  padding: 15px 0; /* Vertical padding */
  display: flex;
  align-items: center;
  justify-content: center; /* Center content within header-top */
}

.header-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 30px; /* Desktop padding */
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--secondary-color); /* Gold logo */
  text-decoration: none;
  white-space: nowrap;
  display: block; /* Ensure logo is visible */
}

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

.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 1002; /* Above overlay and menu */
}

.hamburger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--secondary-color);
  margin-bottom: 5px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.hamburger-menu span:last-child {
  margin-bottom: 0;
}

/* Main Navigation (Desktop) */
.main-nav {
  background-color: var(--primary-color); /* Dark blue */
  width: 100%;
  display: flex; /* Show on desktop */
  justify-content: center; /* Center the nav-container */
  padding: 10px 0; /* Vertical padding */
  position: static; /* Default on desktop */
}

.nav-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: row; /* Horizontal on desktop */
  justify-content: center; /* Center nav links */
  align-items: center;
  padding: 0 30px; /* Desktop padding */
}

.nav-link {
  color: var(--light-text); /* Light text for nav links */
  text-decoration: none;
  padding: 8px 15px;
  font-size: 1rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.3s ease, background-color 0.3s ease;
}
.nav-link:hover {
  color: var(--secondary-color); /* Gold on hover */
}

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

.mobile-buttons-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 0 15px;
}


/* --- Mobile Styles --- */
@media (max-width: 768px) {
  .site-header {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  }

  .header-top {
    padding: 10px 0;
  }

  .header-container {
    padding: 0 15px;
    width: 100%;
    max-width: none; /* Mobile container full width */
    justify-content: space-between;
    position: relative;
    min-height: 50px;
  }

  .logo {
    position: absolute !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    max-width: calc(100% - 100px); /* Leave space for hamburger */
    font-size: 1.6rem;
  }

  .hamburger-menu {
    display: block; /* Show on mobile */
  }

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

  .mobile-buttons-area {
    display: flex; /* Show mobile buttons area */
    background-color: var(--primary-color); /* Match main nav background */
    padding: 10px 0;
    width: 100%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
  }
  .mobile-buttons-container {
    flex-wrap: wrap;
    justify-content: center;
  }
  .mobile-buttons-container .btn {
    flex-grow: 1;
    min-width: 100px;
    margin: 5px;
  }

  /* Mobile Navigation Menu */
  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: 0; /* Will be adjusted by JS based on header height */
    left: 0;
    width: 75%; /* Slide out from left */
    height: 100vh;
    background-color: var(--primary-color);
    flex-direction: column;
    padding-top: 0; /* Initial padding, JS will set top */
    transform: translateX(-100%); /* Start off-screen */
    transition: transform 0.3s ease-in-out;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.5);
    z-index: 999; /* Below hamburger, above overlay */
    overflow-y: auto;
    align-items: flex-start;
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 15px;
    width: 100%;
    max-width: none;
  }

  .nav-link {
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .nav-link:last-child {
    border-bottom: none;
  }

  .mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 998;
  }
  .mobile-menu-overlay.active {
    display: block;
  }

  /* Hamburger menu animation */
  .hamburger-menu.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* --- Footer --- */
.site-footer {
  background-color: var(--dark-background); /* Very dark blue/black */
  color: var(--light-text);
  padding: 40px 20px 20px;
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 215, 0, 0.2); /* Gold border */
}

.footer-col {
  flex: 1;
  min-width: 200px;
  margin-bottom: 20px;
}
.footer-col h3 {
  color: var(--secondary-color); /* Gold headings */
  font-size: 1.1rem;
  margin-bottom: 15px;
  border-bottom: 1px solid rgba(255, 215, 0, 0.3);
  padding-bottom: 8px;
}

.footer-logo {
  font-size: 2rem;
  font-weight: bold;
  color: var(--secondary-color); /* Gold logo */
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  color: var(--light-text);
  text-decoration: none;
  transition: color 0.3s ease;
}
.footer-col ul li a:hover {
  color: var(--secondary-color); /* Gold on hover */
}

.footer-contact p {
  margin-bottom: 8px;
  line-height: 1.6;
}

.footer-bottom {
  max-width: 1200px;
  margin: 20px auto 0;
  text-align: center;
  padding-top: 20px;
  color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 768px) {
  .footer-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
  }
  .footer-col {
    min-width: unset;
    width: 100%;
    margin-bottom: 10px;
  }
  .footer-col h3 {
    text-align: center;
  }
  .footer-col ul {
    text-align: center;
  }
  .footer-logo {
    font-size: 1.8rem;
  }
}
/* 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;
  }
}