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

  --header-offset: 122px; /* Desktop: header-top 68px + main-nav 52px */
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--text-main-color);
  background-color: var(--bg-color);
  padding-top: var(--header-offset);
  overflow-x: hidden; /* Ensure no horizontal scroll on body */
}

body.no-scroll {
  overflow: hidden;
}

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

/* Shared Container Styles */
.header-container, .nav-container, .footer-top-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  box-sizing: border-box;
}

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

.header-top .header-container {
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header .logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--card-bg); /* White text for logo */
  text-transform: uppercase;
  display: block;
  white-space: nowrap;
}

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

.btn {
  padding: 10px 20px;
  border-radius: 5px;
  color: var(--card-bg); /* White text on buttons */
  font-weight: bold;
  text-decoration: none;
  background: var(--button-gradient);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.9;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* Mobile Nav Buttons (hidden by default on desktop) */
.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden on desktop */
  min-height: 48px;
  background-color: var(--card-bg); /* White background for mobile buttons */
  width: 100%;
  padding: 10px 20px;
  justify-content: center;
  align-items: center;
  gap: 10px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

.main-nav .nav-container {
  height: 100%;
  display: flex;
  flex-direction: row; /* Desktop default: row */
  justify-content: center;
  align-items: center;
  gap: 25px;
}

.main-nav .nav-link {
  color: var(--card-bg); /* White text for nav links */
  font-weight: bold;
  padding: 5px 0;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.main-nav .nav-link:hover {
  color: #e0e0e0;
}

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

.hamburger-menu .bar {
  width: 100%;
  height: 3px;
  background-color: var(--card-bg); /* White bars */
  transition: all 0.3s ease;
}

.hamburger-menu.active .bar:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger-menu.active .bar:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Overlay (hidden by default) */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
}

.overlay.active {
  display: block;
}

/* Footer */
.site-footer {
  background-color: var(--text-main-color); /* Dark background for footer */
  color: #e0e0e0;
  padding: 40px 0 20px;
  font-size: 14px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h3 {
  color: var(--card-bg); /* White text for footer headings */
  font-size: 16px;
  margin-bottom: 15px;
}

.site-footer .footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color); /* Primary color for footer logo */
  text-transform: uppercase;
  margin-bottom: 15px;
  display: block;
}

.footer-description {
  line-height: 1.6;
  color: #b0b0b0;
  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: #b0b0b0;
  transition: color 0.3s ease;
}

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

.footer-slot-anchor-inner {
  min-height: 1px; /* Ensure visibility for system injection */
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  color: #888;
}

.footer-bottom p {
  margin: 0;
}

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

  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }

  /* Header adjustments */
  .site-header {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
  }

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

  .header-top .header-container {
    padding-left: 15px;
    padding-right: 15px;
    width: 100%;
    max-width: none;
    justify-content: space-between;
  }

  .site-header .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 24px;
    max-width: calc(100% - 100px); /* Prevent logo from overlapping hamburger/space */
  }

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

  .hamburger-menu {
    display: flex;
    order: -1;
    margin-right: auto;
    width: 25px;
    height: 20px;
  }
  .hamburger-menu.active {
    position: relative;
    z-index: 1002;
  }

  /* Mobile Nav Buttons */
  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    padding-left: 15px;
    padding-right: 15px;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
    flex-wrap: nowrap;
    justify-content: center;
  }
  .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 Navigation (mobile) */
  .main-nav {
    display: none; /* Hidden by default */
    flex-direction: column;
    position: fixed;
    top: var(--header-offset); /* Position below fixed header */
    left: 0;
    width: 80%; /* Adjust width as needed */
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: var(--accent-color);
    transform: translateX(-100%); /* Slide out of view */
    transition: transform 0.3s ease-out;
    padding: 20px;
    box-sizing: border-box;
    overflow-y: auto;
    z-index: 1001;
  }

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

  .main-nav .nav-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    width: 100%;
    max-width: none;
    padding: 0;
  }

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

  /* Footer adjustments */
  .footer-top-grid {
    grid-template-columns: 1fr;
    padding-left: 15px;
    padding-right: 15px;
    gap: 25px;
  }
  .footer-col {
    text-align: center;
  }
  .site-footer .footer-logo {
    margin: 0 auto 15px;
  }
  .footer-col h3 {
    text-align: center;
  }
  .footer-nav {
    text-align: center;
  }
}
/* 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;
}