:root {
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) + 2px buffer */
  --color-primary: #113B7A;
  --color-secondary: #1D5FD1;
  --color-button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --color-card-bg: #10233F;
  --color-text-main: #F3F8FF;
  --color-text-secondary: #AFC4E8;
  --color-border: #244D84;
  --color-glow: #4FA8FF;
  --color-gold: #F2C14E;
  --color-divider: #1B3357;
  --color-deep-navy: #08162B;
}

body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  color: var(--color-text-main);
  background-color: var(--color-deep-navy);
  padding-top: var(--header-offset); /* Fixed header offset */
  overflow-x: hidden; /* Prevent body overflow on mobile */
}

body.no-scroll {
  overflow: hidden;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  background-color: var(--color-deep-navy); /* Base color for header */
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--color-primary); /* Use primary color for header-top */
  width: 100%;
}

.header-container {
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px; /* Padding for desktop container */
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--color-gold); /* Using gold for logo for premium feel */
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block; /* Ensure logo is visible */
  line-height: 1;
}
.logo img {
  display: block;
  max-height: 60px;
  height: auto;
  width: auto;
  max-width: 280px;
  object-fit: contain;
}

.desktop-nav-buttons {
  display: flex;
  gap: 12px;
  align-items: center;
}

.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden by default on desktop */
  min-height: 48px;
  background-color: var(--color-deep-navy); /* Separate background for mobile buttons */
  padding: 0 15px; /* Mobile specific padding */
}

.btn {
  padding: 10px 20px;
  border-radius: 25px;
  background: var(--color-button-gradient);
  color: var(--color-text-main);
  font-weight: bold;
  font-size: 15px;
  text-align: center;
  white-space: nowrap;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--color-secondary); /* Use secondary color for main-nav */
  width: 100%;
}

.nav-container {
  box-sizing: border-box;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  padding: 0 20px;
  gap: 25px; /* Spacing between desktop nav links */
}

.nav-link {
  color: var(--color-text-main);
  font-size: 16px;
  font-weight: 600;
  padding: 5px 0;
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold); /* Underline with gold color */
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

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

.hamburger-menu span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text-main);
  border-radius: 2px;
  position: absolute;
  left: 0;
  transition: all 0.3s ease;
}

.hamburger-menu span:nth-child(1) { top: 0; }
.hamburger-menu span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger-menu span:nth-child(3) { bottom: 0; }

.hamburger-menu.active span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}
.hamburger-menu.active span:nth-child(2) {
  opacity: 0;
}
.hamburger-menu.active span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* Overlay for 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: 998; /* Below mobile menu, above main content */
}
.overlay.active {
  display: block;
}

/* Footer Styles */
.site-footer {
  background-color: var(--color-card-bg); /* Footer background */
  color: var(--color-text-secondary);
  padding: 40px 20px 20px;
  font-size: 14px;
  line-height: 1.6;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr); /* 4 columns, first one wider */
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-divider);
}

.footer-col h3 {
  color: var(--color-text-main);
  font-size: 18px;
  margin-bottom: 15px;
  position: relative;
}
.footer-col h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 40px;
  height: 2px;
  background-color: var(--color-gold);
}

.footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 15px;
  display: block;
}

.footer-description {
  margin-top: 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

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

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

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

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

.footer-bottom {
  text-align: center;
  max-width: 1200px;
  margin: 20px auto 0;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-divider);
  padding-top: 20px;
}
.footer-bottom p {
  margin: 0;
}

.footer-slot-anchor-inner {
  /* This container is for dynamic content injection and should remain empty */
  min-height: 1px; /* Ensure it takes up minimal space */
}

/* Mobile Responsive */
@media (max-width: 768px) {
  :root {
    --header-offset: 110px; /* Mobile: 60px (header-top) + 48px (mobile-nav-buttons) + 2px buffer */
  }

  body {
    padding-top: var(--header-offset);
    overflow-x: hidden; /* Ensure body overflow is hidden */
  }

  /* Header adjustments for mobile */
  .site-header {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  }

  .header-top {
    min-height: 60px;
    height: 60px;
    padding: 0 15px; /* Smaller padding for mobile */
    justify-content: space-between; /* To push hamburger left, logo center, empty space right */
  }
  .header-container {
    max-width: none; /* No max-width on mobile */
    padding: 0; /* Handled by header-top */
    justify-content: flex-start; /* Default, will be overridden for logo centering */
  }

  .hamburger-menu {
    display: block; /* Show hamburger on mobile */
    order: 0; /* Place to the left */
    margin-right: auto; /* Push logo to center */
  }

  .logo {
    flex: 1 !important; /* Allow logo to take available space */
    display: flex !important; /* Use flex for centering */
    justify-content: center !important; /* Center the logo */
    align-items: center !important;
    font-size: 24px;
    order: 1; /* Place in the middle */
    padding-right: 30px; /* Balance the hamburger menu width */
  }
  .logo img {
    max-height: 56px !important; /* Smaller logo for mobile */
  }

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

  .mobile-nav-buttons {
    display: flex !important; /* Show mobile buttons */
    min-height: 48px;
    align-items: center;
    justify-content: center; /* Center buttons if only one, space-between for two */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px; /* Consistent padding */
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    background-color: var(--color-deep-navy); /* Consistent background */
  }
  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* For two buttons with 10px gap */
    box-sizing: border-box;
    padding: 8px 12px;
    font-size: 13px;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
    border-radius: 20px; /* Slightly smaller radius for mobile */
  }

  .main-nav {
    display: none; /* Hidden by default, shown via JS .active class */
    position: fixed;
    top: var(--header-offset); /* Position below fixed header */
    left: 0;
    width: 250px; /* Width of the mobile menu */
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: var(--color-primary); /* Mobile menu background */
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    box-sizing: border-box;
    transform: translateX(-100%); /* Start off-screen */
    transition: transform 0.3s ease;
    z-index: 999; /* Below overlay, above main content */
    overflow-y: auto; /* Allow scrolling for long menus */
  }

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

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

  .nav-link {
    width: 100%;
    padding: 10px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--color-divider); /* Separator for mobile links */
  }
  .nav-link::after {
    display: none; /* No underline effect on mobile */
  }
  .nav-link:hover {
    color: var(--color-gold);
  }

  /* Footer adjustments for mobile */
  .site-footer {
    padding: 30px 15px 15px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column layout for mobile */
    gap: 30px;
    margin-bottom: 20px;
  }

  .footer-col {
    text-align: left;
  }
  .footer-col h3::after {
    left: 0;
  }

  /* Mobile content overflow prevention */
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
}
/* 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;
  }
}
/* 内容保护（系统追加，请勿删除） */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}