:root {
  --primary-color: #017439;
  --secondary-color: #FFFFFF;
  --button-bg-register: #C30808;
  --button-text-register: #FFFF00;
  --button-bg-login: #C30808;
  --button-text-login: #FFFF00;
  --background-color: #FFFFFF;
  --text-color-dark: #333333;
  --text-color-light: #FFFFFF;

  /* Header offset calculation */
  --header-top-height-desktop: 70px; /* Logo + Buttons */
  --main-nav-height-desktop: 50px; /* Nav links */
  --header-offset: calc(var(--header-top-height-desktop) + var(--main-nav-height-desktop)); /* Desktop */
}

@media (max-width: 768px) {
  :root {
    --header-top-height-mobile: 60px; /* Hamburger + Logo */
    --mobile-nav-buttons-height-mobile: 50px; /* Mobile buttons */
    --header-offset: calc(var(--header-top-height-mobile) + var(--mobile-nav-buttons-height-mobile)); /* Mobile */
  }
  .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 {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--text-color-dark);
  background-color: var(--background-color);
  padding-top: var(--header-offset); /* Apply header offset to body */
}

body.no-scroll {
  overflow: hidden;
}

/* Site Header - Fixed & Suspended */
.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(--secondary-color); /* Fallback, should be set by children */
}

/* Header Top Section (Logo & Desktop Buttons) */
.header-top {
  background-color: var(--primary-color); /* Darker green */
  color: var(--text-color-light);
  min-height: var(--header-top-height-desktop);
  display: flex;
  align-items: center;
}

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

.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--button-text-register); /* Yellow for logo text */
  text-decoration: none;
  white-space: nowrap;
  display: block; /* Ensure logo is always visible */
}

.desktop-nav-buttons {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-block;
  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; /* Prevent buttons from wrapping on desktop */
}

.btn-register {
  background-color: var(--button-bg-register);
  color: var(--button-text-register);
  border: 1px solid var(--button-bg-register);
}

.btn-register:hover {
  background-color: #A00707; /* Slightly darker red */
}

.btn-login {
  background-color: var(--button-bg-login);
  color: var(--button-text-login);
  border: 1px solid var(--button-bg-login);
}

.btn-login:hover {
  background-color: #A00707; /* Slightly darker red */
}

/* Main Navigation (Desktop) */
.main-nav {
  background-color: #005020; /* Slightly different green from header-top */
  min-height: var(--main-nav-height-desktop);
  display: flex; /* Desktop default: visible */
  align-items: center;
  width: 100%;
}

.main-nav .nav-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  justify-content: center; /* Center nav links */
  gap: 25px;
  padding: 0 20px;
}

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

.main-nav .nav-link:hover {
  color: var(--button-text-register); /* Yellow hover */
}

/* Hamburger Menu (Hidden on Desktop) */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 24px;
  position: relative;
  z-index: 1001; /* Ensure it's above other elements */
}

.hamburger-menu span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--text-color-light);
  margin-bottom: 5px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger-menu span:last-child {
  margin-bottom: 0;
}

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

/* Mobile Menu Overlay (Hidden on Desktop) */
.mobile-menu-overlay {
  display: none; /* Hidden by default */
}

/* Footer */
.site-footer {
  background-color: var(--primary-color);
  color: var(--text-color-light);
  padding: 40px 20px;
  text-align: center;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  text-align: left;
  gap: 20px;
}

.footer-col {
  flex: 1;
  min-width: 200px;
  margin-bottom: 20px;
}

.footer-logo {
  font-size: 20px;
  font-weight: bold;
  color: var(--button-text-register); /* Yellow for footer logo */
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

.site-footer p {
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
}

.site-footer h3 {
  font-size: 18px;
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--secondary-color);
}

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

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

.site-footer ul li a {
  color: var(--text-color-light);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

.site-footer ul li a:hover {
  color: var(--button-text-register);
}


/* --- Mobile Styles --- */
@media (max-width: 768px) {
  /* Header Offset for Mobile */
  :root {
    --header-offset: calc(var(--header-top-height-mobile) + var(--mobile-nav-buttons-height-mobile));
  }

  /* Header Top (Hamburger, Logo) */
  .header-top {
    min-height: var(--header-top-height-mobile);
    padding: 0; /* Reset padding for mobile, container will handle */
  }

  .header-container {
    padding: 0 15px; /* Mobile padding */
    justify-content: space-between;
    width: 100%;
    max-width: none; /* Important for mobile */
    position: relative; /* For logo absolute centering if needed */
  }

  .hamburger-menu {
    display: flex; /* Show hamburger on mobile */
    order: 0; /* Leftmost */
    height: 24px; /* Ensure height for click area */
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  .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);
  }

  .logo {
    order: 1; /* Center */
    flex: 1; /* Allow flex to push it to center */
    text-align: center;
    font-size: 20px; /* Smaller font size for mobile */
    padding: 0 10px; /* Padding to prevent overlap with hamburger/buttons */
    max-width: calc(100% - 80px); /* Adjust max-width to leave space for hamburger */
  }

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

  /* Mobile Navigation Buttons */
  .mobile-nav-buttons {
    display: flex !important; /* Show mobile buttons */
    width: 100%;
    max-width: 100%; /* Ensure it doesn't overflow */
    box-sizing: border-box;
    padding: 10px 15px; /* Padding for mobile buttons */
    overflow: hidden; /* Prevent horizontal scroll */
    gap: 10px; /* Space between buttons */
    flex-wrap: nowrap; /* Keep buttons on one line */
    background-color: var(--primary-color); /* Match header-top background */
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* Account for gap */
    box-sizing: border-box;
    padding: 8px 12px; /* Smaller padding for mobile */
    font-size: 13px; /* Smaller font size for mobile */
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word; /* Ensure long words break */
    overflow-wrap: break-word;
    text-align: center; /* Center text in button */
  }

  /* Main Navigation (Mobile - hidden by default, slides in) */
  .main-nav {
    display: none; /* Hidden by default */
    position: fixed;
    top: var(--header-offset); /* Start below header */
    left: 0;
    width: 280px; /* Sidebar width */
    height: calc(100% - var(--header-offset));
    background-color: #005020; /* Same as desktop main-nav */
    flex-direction: column;
    padding: 20px 0;
    box-sizing: border-box;
    transform: translateX(-100%); /* Start off-screen */
    transition: transform 0.3s ease-out;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
    z-index: 999; /* Below hamburger, above overlay */
    overflow-y: auto; /* Allow 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;
    align-items: flex-start; /* Align links to left */
    gap: 0; /* Reset gap for vertical links */
    padding: 0 15px; /* Mobile padding */
    width: 100%;
    max-width: none; /* Important for mobile */
  }

  .main-nav .nav-link {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

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

  /* Mobile Menu Overlay */
  .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: 998; /* Below menu, above content */
    opacity: 0;
    transition: opacity 0.3s ease-out;
  }

  .mobile-menu-overlay.active {
    display: block; /* Show when active */
    opacity: 1;
  }

  /* Footer Mobile */
  .footer-container {
    flex-direction: column;
    text-align: center;
  }

  .footer-col {
    min-width: unset; /* Remove min-width for mobile */
    width: 100%;
    margin-bottom: 30px;
  }

  .footer-col h3 {
    margin-bottom: 10px;
  }

  .footer-col ul li {
    margin-bottom: 5px;
  }

  .footer-logo {
    margin-bottom: 10px;
  }
}
/* 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;
  }
}