:root {
  --primary-color: #E53935;
  --secondary-color: #FF5A4F;
  --button-gradient: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
  --card-bg: #FFFFFF;
  --page-bg: #F5F7FA;
  --text-main: #333333;
  --border-color: #E0E0E0;
  --header-top-bg: #B71C1C; /* Darker red for contrast */
  --main-nav-bg: #FFFFFF; /* White for strong contrast */
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) + 2px buffer */
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--header-top-bg);
  width: 100%;
  padding: 0 20px; /* Padding for the header-top itself */
}

.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;
}

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

.hamburger-menu .bar {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #FFFFFF; /* White bars on dark red background */
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-menu .bar:nth-child(2) {
  margin: 5px 0;
}

.hamburger-menu.active .bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-menu.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger-menu.active .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: #FFFFFF; /* White logo on dark red background */
  text-decoration: none;
  padding: 0;
  line-height: 1;
  display: flex; /* For potential image logo centering on mobile */
  align-items: center;
  height: 100%; /* Ensure logo text aligns vertically */
}

.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 on desktop by default */
  min-height: 48px; /* Placeholder height */
  background-color: var(--page-bg); /* Background for mobile buttons */
  width: 100%;
  padding: 0 15px; /* Default mobile padding */
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: nowrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 25px;
  color: #FFFFFF;
  text-decoration: none;
  font-weight: bold;
  background: var(--button-gradient);
  transition: all 0.3s ease;
  white-space: nowrap; /* Prevent button text from wrapping on desktop */
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

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

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 25px;
}

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

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

/* Mobile Navigation Overlay */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999; /* Below menu, above content */
  display: none; /* Hidden by default */
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

/* Footer Styles */
.site-footer {
  background-color: #333333; /* Dark background for footer */
  color: #E0E0E0;
  padding: 40px 20px 20px;
  font-size: 14px;
}

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

.footer-col h3 {
  color: #FFFFFF;
  font-size: 16px;
  margin-bottom: 15px;
}

.footer-col p {
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFFFFF;
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

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

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

.footer-nav a {
  color: #E0E0E0;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #555555;
  color: #AAAAAA;
}

.footer-bottom a {
  /* No links allowed in footer-bottom */
  text-decoration: none;
  color: inherit;
}

.footer-slot-anchor-inner {
  /* This must remain empty for content injection */
  display: block;
  min-height: 1px; /* Ensure it takes up minimal space for visibility */
}

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

  .header-top {
    min-height: 60px !important;
    height: 60px !important;
    padding: 0 15px; /* Smaller padding for mobile */
    justify-content: space-between; /* Hamburger left, potentially other elements right */
  }

  .header-container {
    width: 100%;
    max-width: none; /* No max-width on mobile */
    padding: 0; /* Handled by header-top padding */
    position: relative; /* For absolute logo positioning */
  }

  .hamburger-menu {
    display: block; /* Show hamburger on mobile */
    position: relative;
    z-index: 1001; /* Ensure it's clickable */
  }
  
  /* Mobile Logo Centering (Method 2: Absolute Positioning for robustness) */
  .logo {
    position: absolute !important; /* Force absolute positioning */
    left: 50% !important;
    transform: translateX(-50%) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    max-width: calc(100% - 100px); /* Account for hamburger width */
    z-index: 1; /* Below hamburger */
  }
  
  .logo img {
    max-height: 56px !important; /* Mobile max height */
  }

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

  .mobile-nav-buttons {
    display: flex !important; /* Show mobile buttons */
    min-height: 48px;
    background-color: var(--page-bg); /* Match page background for visual separation */
    padding: 8px 15px; /* Adjust padding for buttons */
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: nowrap;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08); /* Subtle shadow for separation */
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* Two buttons with 10px gap */
    padding: 8px 12px;
    font-size: 13px;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
    text-align: center;
  }
  
  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: var(--header-offset); /* Position below header and mobile buttons */
    left: 0;
    width: 280px; /* Width of the mobile menu */
    height: calc(100% - var(--header-offset));
    background-color: #333333; /* Dark background for mobile menu */
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 20px;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Slide out of view */
    transition: transform 0.3s ease;
    z-index: 1001; /* Above header */
    overflow-y: auto; /* Enable scrolling for long menus */
  }

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

  .nav-container {
    width: 100%;
    max-width: none; /* No max-width on mobile */
    padding: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: 0; /* No gap for vertical list */
    width: 100%;
  }

  .nav-list li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-list a {
    color: #FFFFFF; /* White links on dark menu background */
    padding: 12px 20px;
    display: block;
    font-size: 16px;
  }

  .nav-list a:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }

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

  .footer-col h3 {
    margin-top: 20px;
  }
  
  .footer-nav {
    text-align: center;
  }

  .footer-logo {
    margin-bottom: 10px;
  }
  
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}

/* No-scroll class for body when menu is open */
body.no-scroll {
  overflow: hidden;
}
/* 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;
}