:root {
  --primary-color: #E53935;
  --secondary-color: #FF5A4F;
  --text-main-color: #333333;
  --card-bg-color: #FFFFFF;
  --page-bg-color: #F5F7FA;
  --border-color: #E0E0E0;
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) */
}

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

/* --- General Button Styles --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  cursor: pointer;
  white-space: nowrap;
  background: linear-gradient(180deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  color: var(--text-main-color); /* Adjusted for WCAG AA contrast */
  border: none;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

/* --- Header Styles --- */
.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);
}

.header-top {
  box-sizing: border-box;
  height: 68px; /* Desktop height */
  display: flex;
  align-items: center;
  background-color: #333333; /* Dark grey for contrast */
  color: #FFFFFF;
  overflow: hidden;
}

.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: #FFD700; /* Gold-like color for logo text to stand out */
  text-decoration: none;
  display: flex; /* For potential image logo alignment */
  align-items: center;
}

.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 button bar height */
  background-color: #222222; /* Slightly lighter dark grey than header-top */
  color: #FFFFFF;
  padding: 0 15px;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  gap: 10px;
  flex-wrap: nowrap;
}

.main-nav {
  box-sizing: border-box;
  height: 52px; /* Desktop height */
  display: flex;
  align-items: center;
  background-color: var(--primary-color); /* Primary red for main nav */
  overflow: hidden;
}

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

.nav-link {
  color: #FFFFFF;
  text-decoration: none;
  padding: 0 15px;
  font-weight: bold;
  transition: color 0.3s;
  white-space: nowrap;
  height: 100%; /* Ensure link fills parent for vertical alignment */
  display: flex;
  align-items: center;
}

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

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

.hamburger-menu .bar {
  width: 100%;
  height: 4px;
  background-color: #FFFFFF;
  margin: 5px 0;
  transition: 0.4s;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 999; /* Below menu, above content */
  display: none; /* Hidden by default */
  transition: opacity 0.3s ease;
  opacity: 0;
}

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

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

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

.footer-col h3 {
  color: #FFFFFF;
  font-size: 16px;
  margin-top: 0;
  margin-bottom: 15px;
}

.footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFD700; /* Gold-like color for logo text */
  text-decoration: none;
  margin-bottom: 15px;
  display: block;
}

.footer-description {
  line-height: 1.6;
  margin-bottom: 15px;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

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

.footer-nav li a {
  color: #FFFFFF;
  text-decoration: none;
  margin-bottom: 8px;
  display: block;
  transition: color 0.3s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #444444;
  max-width: 1200px;
  margin: 0 auto;
}

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

/* Ensure all slot anchors are visible and not hidden */
.footer-slot-anchor-inner, .footer-slot-anchor {
  min-height: 1px; /* Ensure it takes up space */
  width: 100%;
  box-sizing: border-box;
}

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

  body {
    padding-top: var(--header-offset);
  }

  .header-top {
    height: 60px; /* Mobile height */
    padding: 0 15px; /* Adjust padding for mobile */
  }

  .header-container {
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    padding: 0; /* Handled by header-top padding */
    position: relative; /* For logo absolute positioning */
  }

  .logo {
    position: absolute !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    max-width: calc(100% - 100px); /* Leave space for hamburger */
    font-size: 24px;
  }

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

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

  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    align-items: center;
    justify-content: center; /* Center buttons horizontally */
    padding: 0 15px;
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
  }

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

  .main-nav {
    height: calc(100vh - var(--header-offset)); /* Full height minus header */
    position: fixed;
    top: var(--header-offset); /* Below fixed header */
    left: 0;
    width: 280px; /* Sidebar width */
    max-width: 80vw; /* Max width for smaller screens */
    background-color: #222222; /* Darker background for mobile menu */
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Hidden by default */
    transition: transform 0.3s ease;
    display: none; /* Hidden by default */
    z-index: 1001; /* Above overlay */
    overflow-y: auto; /* Enable scrolling for long menus */
  }

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

  .nav-container {
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    flex-direction: column;
    align-items: flex-start;
    padding: 0;
  }

  .nav-link {
    width: 100%;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #FFFFFF;
    justify-content: flex-start;
  }

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

  .hamburger-menu {
    display: block; /* Show hamburger on mobile */
    position: relative; /* Keep it in flow */
    margin-left: 0;
  }

  .hamburger-menu.active .bar:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

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

  .hamburger-menu.active .bar:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .footer-col {
    text-align: center;
  }

  .footer-col h3 {
    margin-top: 20px;
  }

  .footer-nav li a {
    display: inline-block;
    margin: 0 10px 8px;
  }

  .footer-logo {
    text-align: center;
  }

  /* Mobile content overflow protection */
  .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.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;
}