:root {
  --primary-color: #2F6BFF;
  --secondary-color: #6FA3FF;
  --button-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
  --card-bg: #FFFFFF;
  --page-bg: #F4F7FB;
  --text-main: #1F2D3D;
  --text-black: #000000;
  --border-color: #D6E2FF;
  --glow-color: #A5C4FF;

  /* Header offset for desktop (header-top 68px + main-nav 52px + 2px buffer) */
  --header-offset: 122px;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--text-black);
  margin-top: 0;
  margin-bottom: 10px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 25px;
  background: var(--button-gradient);
  color: #FFFFFF;
  font-weight: bold;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  text-decoration: none; /* Remove underline for buttons */
  white-space: nowrap;
}

.btn:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

/* Header Styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  background-color: transparent; /* Actual backgrounds are on header-top and main-nav */
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--primary-color); /* 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 content inside container */
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFFFFF;
  text-transform: uppercase;
  display: flex; /* For potential image logo centering */
  align-items: center;
  justify-content: flex-start; /* Default desktop alignment */
}

.logo img {
  display: block;
  max-height: 60px; /* Desktop max height */
  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; /* Mobile height for this bar */
  background-color: var(--card-bg); /* White background for mobile buttons bar */
  border-bottom: 1px solid var(--border-color);
}

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex; /* Desktop default: visible */
  align-items: center;
  overflow: hidden;
  background-color: var(--page-bg); /* Lighter background for main-nav */
  width: 100%;
  border-top: 1px solid var(--border-color);
}

.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: var(--text-main);
  font-weight: 600;
  padding: 5px 0;
  transition: color 0.3s ease;
  white-space: nowrap;
}

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

/* Hamburger Menu (Desktop hidden) */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  cursor: pointer;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  z-index: 1001;
  padding: 5px;
}

.hamburger-menu .bar {
  width: 100%;
  height: 3px;
  background-color: #FFFFFF;
  transition: all 0.3s ease;
}

/* Overlay for mobile menu (Desktop hidden) */
.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;
  transition: opacity 0.3s ease;
}

.overlay.active {
  display: block;
  opacity: 1;
}

/* Footer Styles */
.site-footer {
  background-color: var(--text-black); /* Dark background for footer */
  color: #FFFFFF;
  padding: 40px 0 20px;
}

.footer-top-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-logo {
  font-size: 22px;
  font-weight: bold;
  color: #FFFFFF;
  text-transform: uppercase;
  margin-bottom: 15px;
  display: inline-block;
}

.footer-description {
  font-size: 14px;
  line-height: 1.6;
  color: #CCCCCC;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

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

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

.footer-nav a {
  color: #CCCCCC;
  font-size: 14px;
  transition: color 0.3s ease;
}

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

.footer-slot-anchor-inner {
  /* Ensure anchors are visible and do not hide content */
  min-height: 1px; /* Smallest possible height */
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 13px;
  color: #CCCCCC;
}

.footer-bottom p {
  margin: 0;
}

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

  body {
    overflow-x: hidden;
  }

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

  .header-container {
    padding: 0 15px; /* Smaller padding for mobile */
    max-width: none; /* Remove max-width on mobile */
    width: 100%;
    justify-content: space-between; /* Keep space-between for hamburger/logo/empty space */
  }

  .hamburger-menu {
    display: flex; /* Show hamburger on mobile */
    order: 1; /* Place on left */
    margin-right: auto; /* Push logo to center */
    color: #FFFFFF;
  }

  .hamburger-menu.active .bar:nth-child(1) { transform: translateY(11px) rotate(45deg); }
  .hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
  .hamburger-menu.active .bar:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }


  .logo {
    order: 2; /* Place logo in center */
    flex: 1 !important; /* Allow logo to take available space */
    display: flex !important; /* Force flex for centering */
    justify-content: center !important; /* Center logo horizontally */
    align-items: center !important;
    max-width: calc(100% - 100px); /* Ensure logo doesn't push hamburger/buttons out */
  }

  .logo img {
    max-height: 56px !important; /* Mobile max height */
    max-width: 100%;
    height: auto;
  }

  .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, or use gap for two */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px; /* Padding for mobile buttons container */
    overflow: hidden; /* Prevent overflow */
    gap: 10px; /* Space between buttons */
    flex-wrap: nowrap; /* Ensure buttons stay on one line */
    background-color: var(--card-bg); /* Match header-top for a solid bar */
    border-bottom: 1px solid var(--border-color);
  }

  .mobile-nav-buttons .btn {
    flex: 1; /* Distribute space evenly */
    min-width: 0; /* Allow shrinking */
    max-width: calc(50% - 5px); /* Max width for two buttons with 10px gap */
    padding: 8px 12px; /* Smaller padding */
    font-size: 13px; /* Smaller font size */
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed; /* Fixed position for mobile menu */
    top: var(--header-offset); /* Position below fixed header */
    left: 0;
    width: 80%; /* Menu width */
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: #FFFFFF; /* White background for mobile menu */
    flex-direction: column; /* Vertical layout */
    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 to the left */
    transition: transform 0.3s ease;
    z-index: 1001; /* Above overlay */
    overflow-y: auto; /* Allow scrolling for long menus */
    min-height: auto; /* Reset min-height */
    height: auto; /* Allow height to adjust to content */
    border-top: none; /* Remove border-top for mobile menu */
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 20px;
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    gap: 15px; /* Smaller gap for mobile nav links */
  }

  .nav-link {
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
  }

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

  .overlay.active {
    display: block;
    opacity: 1;
  }

  body.no-scroll {
    overflow: hidden;
  }

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

  .footer-col h3 {
    margin-top: 15px;
  }

  /* Prevent content images from overflowing */
  .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;
}