:root {
  --header-offset: 122px; /* Desktop: header-top (68px) + main-nav (52px) */
  --primary-color: #2F6BFF;
  --accent-color: #6FA3FF;
  --button-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
  --card-bg: #FFFFFF;
  --page-bg: #F4F7FB;
  --text-main: #1F2D3D;
  --border-color: #D6E2FF;
  --glow-color: #A5C4FF;
}

body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding-top: var(--header-offset);
  background-color: var(--page-bg);
  color: var(--text-main);
  overflow-x: hidden; /* Prevent horizontal scroll for body */
}

body.no-scroll {
  overflow: hidden;
}

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

a:hover {
  color: var(--accent-color);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  background-color: var(--card-bg); /* Use card-bg for overall header, sections will have their own */
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #1A3B8A; /* Darker blue for header top */
  width: 100%;
  color: #FFFFFF;
}

.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;
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: #FFFFFF;
  white-space: nowrap;
  flex-shrink: 0;
  display: block; /* Ensure it's block for text alignment or flex for image */
  text-align: left; /* Default for desktop */
}

.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;
  flex-shrink: 0;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  box-sizing: border-box;
}

.btn-primary {
  background: var(--button-gradient);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 4px 10px rgba(47, 107, 255, 0.3);
}

.btn-primary:hover {
  opacity: 0.9;
  box-shadow: 0 6px 15px rgba(47, 107, 255, 0.4);
}

.btn-secondary {
  background-color: var(--accent-color);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 4px 10px rgba(111, 163, 255, 0.3);
}

.btn-secondary:hover {
  opacity: 0.9;
  box-shadow: 0 6px 15px rgba(111, 163, 255, 0.4);
}

.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden by default on desktop */
  min-height: 48px;
  width: 100%;
  background-color: var(--card-bg); /* Or match main-nav background */
  padding: 8px 20px; /* Default padding for desktop if shown */
  justify-content: center; /* Center buttons if visible on desktop */
  gap: 10px;
  box-shadow: 0 1px 5px rgba(0,0,0,0.05); /* Subtle shadow below header-top */
}

.mobile-nav-buttons .btn {
  padding: 10px 15px; /* Slightly smaller for mobile */
  font-size: 15px;
}

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex; /* Desktop default */
  align-items: center;
  overflow: hidden;
  background-color: var(--accent-color); /* Accent blue 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;
}

.nav-link {
  color: #FFFFFF;
  font-size: 16px;
  font-weight: bold;
  padding: 5px 0;
  white-space: nowrap;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: #E0E0E0; /* Lighter white on hover */
}

/* Hamburger Menu */
.hamburger-menu {
  display: none; /* Hidden by default on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 24px;
  position: relative;
  z-index: 1001; /* Above logo and buttons */
  flex-shrink: 0;
}

.hamburger-menu span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #FFFFFF;
  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); }

.mobile-menu-overlay {
  display: none; /* Hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
  display: block;
  opacity: 1;
}

/* Footer Styles */
.site-footer {
  background-color: #1A3B8A; /* Dark blue for footer */
  color: #E0E0E0;
  padding: 40px 20px 20px;
  font-size: 14px;
  line-height: 1.6;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto 30px auto;
}

.footer-col h3 {
  color: #FFFFFF;
  font-size: 18px;
  margin-bottom: 15px;
}

.footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFFFFF;
  margin-bottom: 15px;
  display: block;
}

.footer-description {
  margin-bottom: 15px;
  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: #E0E0E0;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 1200px;
  margin: 0 auto;
}

.footer-bottom p {
  margin: 0;
  color: #C0C0C0;
}

/* Footer Dynamic Slots - must be visible for injection */
.footer-slot-anchor, .footer-slot-anchor-inner {
  min-height: 1px; /* Ensure it takes up space even if empty */
  display: block;
}

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

  /* Header */
  .header-top {
    min-height: 60px !important;
    height: 60px !important;
  }

  .header-container {
    padding: 0 15px;
    position: relative; /* For absolute positioning of logo if needed */
  }

  .hamburger-menu {
    display: block;
    position: relative;
    left: 0;
  }
  
  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 24px; /* Adjust font size for mobile */
  }

  .logo img {
    max-height: 56px !important; /* Adjust for mobile header height */
  }

  .desktop-nav-buttons {
    display: none !important;
  }

  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    align-items: center;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 8px 15px; /* Adjusted padding for mobile */
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    background-color: var(--card-bg); /* Match header-top or main-nav */
    box-shadow: 0 1px 5px rgba(0,0,0,0.05); /* Subtle shadow */
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* 50% minus half of gap */
    box-sizing: border-box;
    padding: 8px 12px; /* Smaller padding */
    font-size: 13px; /* Smaller font size */
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: var(--header-offset); /* Position below fixed header and buttons */
    left: 0;
    width: 280px; /* Width of the mobile menu */\    height: calc(100% - var(--header-offset)); /* Fill remaining height */
    background-color: #1A3B8A; /* Dark blue for mobile menu */
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: 20px 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Slide out of view */
    transition: transform 0.3s ease;
    overflow-y: auto; /* Allow scrolling for long menus */
    box-sizing: border-box;
    min-height: auto; /* Override fixed height */
    height: auto; /* Override fixed height */
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 20px;
    width: 100%;
    max-width: none;
    gap: 15px; /* Spacing between menu items */
  }

  .nav-link {
    width: 100%;
    padding: 10px 0;
    font-size: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .nav-link:last-child {
    border-bottom: none;
  }

  /* Footer */
  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column on mobile */
    gap: 20px;
  }

  .footer-col {
    text-align: left; /* Default text alignment for stacked columns */
  }
  .footer-col h3 {
    text-align: left;
  }
  .footer-logo {
    text-align: left;
  }
  .footer-nav {
    text-align: left; /* Keep list left-aligned */
  }
  .footer-nav li {
    display: block; /* Stack vertically */
    margin-bottom: 8px;
  }
  .footer-nav li a {
    white-space: normal; /* Allow wrap */
  }

  /* Mobile overflow protection */
  .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;
  }
}