/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #1F2D3D; /* Text Main */
  background-color: #F4F7FB; /* Background */
  padding-top: var(--header-offset); /* Fixed header offset */
  overflow-x: hidden; /* Prevent horizontal scroll on desktop */
}

a {
  text-decoration: none;
  color: #2F6BFF; /* Main Color */
}

a:hover {
  text-decoration: underline;
}

ul {
  list-style: none;
}

/* Header Variables & Global Offset */
:root {
  --header-offset: 122px; /* Desktop: header-top (68px) + main-nav (52px) + 2px buffer */
}

/* 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);
  background-color: #FFFFFF; /* Ensure solid background for fixed header */
}

/* Header Top Bar */
.header-top {
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #2F6BFF; /* Main Color */
  color: #FFFFFF;
  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 logo and buttons */
}

/* Logo */
.logo {
  font-size: 28px;
  font-weight: bold;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: flex; /* For potential image logo centering */
  align-items: center;
  height: 100%;
}

.logo img {
  display: block;
  max-height: 60px; /* Matches header-top height */
  height: auto;
  width: auto;
  max-width: 280px;
  object-fit: contain;
}

/* Desktop Navigation Buttons */
.desktop-nav-buttons {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* Mobile Navigation Buttons (hidden by default on desktop) */
.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden by default on desktop */
  min-height: 48px; /* Placeholder height */
  background-color: #F4F7FB; /* Background */
  border-bottom: 1px solid #D6E2FF; /* Border */
}

/* Main Navigation */
.main-nav {
  min-height: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #6FA3FF; /* Auxiliary Color */
  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;
}

.nav-link {
  color: #FFFFFF;
  padding: 0 15px;
  font-weight: bold;
  font-size: 16px;
  text-transform: uppercase;
  height: 100%;
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.2);
  text-decoration: none;
}

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

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

/* Overlay for mobile menu */
.overlay {
  display: none; /* Hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 998;
}

.overlay.active {
  display: block;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 25px;
  color: #FFFFFF;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  background: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%); /* Button color */
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.9;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  text-decoration: none;
}

/* Footer */
.site-footer {
  background-color: #1F2D3D; /* Text Main for a dark footer */
  color: #F4F7FB; /* Background for text */
  padding: 40px 20px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto 40px auto;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFFFFF;
  text-transform: uppercase;
  margin-bottom: 15px;
  letter-spacing: 1px;
}

.footer-description {
  color: #F4F7FB;
  line-height: 1.8;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.footer-title {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 15px;
  color: #FFFFFF;
}

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

.footer-nav a {
  color: #F4F7FB;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: #6FA3FF; /* Auxiliary Color */
  text-decoration: none;
}

.footer-dynamic-col {
  /* This column is for system injection, no visible content by default */
}

.footer-slot-anchor-inner {
  margin-top: 15px; /* Add some spacing for injected content */
}

.footer-bottom {
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 20px;
  color: #F4F7FB;
}

.footer-bottom p {
  margin: 0;
}

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

  body {
    overflow-x: hidden;
  }

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

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

  .header-container {
    width: 100%;
    max-width: none;
    padding: 0 15px;
    justify-content: space-between; /* To push hamburger left and logo center */
    position: relative; /* For absolute logo positioning */
  }

  /* Logo Centering for Mobile */
  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    position: absolute !important; /* To allow hamburger to be truly left */
    left: 50% !important;
    transform: translateX(-50%) !important;
    max-width: calc(100% - 100px); /* Leave space for hamburger and potential right items */
    z-index: 1; /* Below hamburger */
  }

  .logo img {
    max-height: 56px !important; /* Matches mobile header-top height */
    max-width: 100%;
  }

  /* Hamburger Menu */
  .hamburger-menu {
    display: block; /* Show hamburger menu on mobile */
    position: relative;
    z-index: 1001; /* Ensure it's clickable */
  }

  /* Desktop Buttons hidden on Mobile */
  .desktop-nav-buttons {
    display: none !important;
  }

  /* Mobile Buttons visible on Mobile */
  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    align-items: center;
    justify-content: center; /* Center buttons if only one or for even distribution */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
  }

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

  /* Main Navigation (Mobile Drawer) */
  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed;
    top: var(--header-offset); /* Start below the header and mobile buttons */
    left: 0;
    width: 280px; /* Width of the side menu */
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: #1F2D3D; /* Dark background for drawer */
    flex-direction: column;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Slide out of view */
    transition: transform 0.3s ease;
    overflow-y: auto; /* Enable scrolling for long menus */
    z-index: 999; /* Below overlay */
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0;
    height: auto;
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: 12px 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #F4F7FB;
    font-size: 15px;
  }

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

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

  /* Footer Mobile */
  .site-footer {
    padding: 30px 15px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column layout */
    gap: 20px;
    margin-bottom: 20px;
  }

  .footer-col {
    align-items: flex-start;
  }

  .footer-logo {
    font-size: 22px;
  }

  .footer-title {
    font-size: 16px;
  }

  .footer-bottom {
    padding-top: 15px;
  }
}

/* Ensure color contrast for buttons */
.btn {
  color: #FFFFFF; /* White text on blue gradient background */
}

/* Ensure color contrast for header-top text */
.header-top {
  color: #FFFFFF; /* White text on blue background */
}

/* Ensure color contrast for main-nav text */
.main-nav .nav-link {
  color: #FFFFFF; /* White text on blue background */
}

/* Ensure color contrast for footer text */
.site-footer, .footer-description, .footer-nav a {
  color: #F4F7FB; /* Light text on dark footer background */
}
.footer-title {
  color: #FFFFFF; /* White title on dark footer background */
}
/* 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;
}