:root { --header-offset: 122px; --primary-color: #2F6BFF; --auxiliary-color: #6FA3FF; --btn-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%); --card-bg: #FFFFFF; --bg-color: #F4F7FB; --text-main: #1F2D3D; --text-custom-1776249996415: #000000; --border-color: #D6E2FF; --glow-color: #A5C4FF; }

body { margin: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: var(--text-main); background-color: var(--bg-color); padding-top: var(--header-offset); overflow-x: hidden; }

/* Site Header - Fixed */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--card-bg); /* Overall header background, allowing sub-sections to have distinct colors */
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
}

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

/* Logo */
.logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFFFFF;
  text-decoration: none;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

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

/* 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); /* Matches overall header background */
  box-shadow: 0 1px 5px rgba(0,0,0,0.05);
}

/* Main Navigation Section */
.main-nav {
  box-sizing: border-box;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--auxiliary-color); /* Auxiliary color for main nav */
  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-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 25px;
}

.nav-list li a {
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 10px 0;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.nav-list li a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* Buttons */
.btn {
  background: var(--btn-gradient);
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  font-size: 14px;
  transition: all 0.3s ease;
  white-space: nowrap;
  display: inline-block;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

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

/* Hamburger Menu - Hidden on desktop */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  width: 30px;
  height: 24px;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
  position: absolute;
  left: 15px; /* Adjust for mobile padding */
  z-index: 1001; /* Above mobile-overlay */
}

.hamburger-menu .bar {
  width: 100%;
  height: 3px;
  background-color: #FFFFFF;
  transition: all 0.3s ease;
  border-radius: 2px;
}

.hamburger-menu.active .bar:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
.hamburger-menu.active .bar:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }

/* Mobile Overlay - Hidden on desktop */
.mobile-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;
  backdrop-filter: blur(2px);
}

/* Footer */
.site-footer {
  background-color: var(--bg-color);
  padding: 40px 20px;
  color: var(--text-main);
  font-size: 14px;
  box-sizing: border-box;
}

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

.footer-col h3 {
  color: var(--text-custom-1776249996415);
  font-size: 16px;
  margin-bottom: 15px;
}

.footer-logo {
  font-size: 20px;
  font-weight: bold;
  color: var(--text-main);
  text-decoration: none;
  margin-bottom: 15px;
  display: block;
}

.footer-description {
  line-height: 1.8;
  color: var(--text-main);
  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 li a {
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-main);
  max-width: 1200px;
  margin: 0 auto;
}

.footer-bottom p {
  margin: 0;
}

/* Footer Slot Anchor Inner - Must remain visible */
.footer-slot-anchor-inner { min-height: 1px; }

/* Responsive Styles */
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { padding-top: var(--header-offset); }

  .header-top {
    height: 60px;
  }
  .header-container {
    padding: 0 15px;
    position: relative; /* For mobile logo centering */
  }
  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 20px;
  }
  /* If logo is an image, use max-height: 56px here */
  /* .logo img { max-height: 56px !important; } */

  .desktop-nav-buttons {
    display: none !important;
  }
  .mobile-nav-buttons {
    display: flex !important; /* Visible on mobile */
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 8px 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    height: 48px; /* Fixed height for mobile buttons bar */
    background-color: var(--card-bg);
    box-shadow: 0 1px 5px rgba(0,0,0,0.05);
  }
  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* Account for gap */
    box-sizing: border-box;
    padding: 8px 12px;
    font-size: 13px;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .main-nav {
    height: auto; /* Allow content to dictate height */
    max-height: calc(100vh - var(--header-offset)); /* Max height for scrollable menu */
    position: fixed;
    top: var(--header-offset); /* Position below header and mobile buttons */
    left: 0;
    width: 75%; /* Adjust width for mobile menu */
    max-width: 300px;
    background-color: var(--card-bg); /* White background for mobile menu */
    transform: translateX(-100%); /* Hidden by default */
    transition: transform 0.3s ease-out;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 0; /* Padding handled by list items */
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    overflow-y: auto;
    z-index: 1001;
    display: none; /* Hidden by default */
  }

  .main-nav.active {
    transform: translateX(0); /* Show menu */
    display: flex; /* Ensure display is set for visibility */
  }

  .nav-container {
    width: 100%;
    max-width: none;
    padding: 0;
    flex-direction: column;
    align-items: flex-start;
    height: auto;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }
  .nav-list li {
    width: 100%;
  }
  .nav-list li a {
    color: var(--text-main);
    padding: 12px 20px;
    display: block;
    border-bottom: 1px solid var(--border-color);
    font-size: 16px;
  }
  .nav-list li:last-child a { border-bottom: none; }

  .hamburger-menu {
    display: flex; /* Visible on mobile */
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 15px;
  }

  .mobile-overlay.active {
    display: block; /* Show overlay */
  }

  .site-footer {
    padding: 30px 15px;
  }
  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column on mobile */
    margin-bottom: 20px;
  }
  .footer-col {
    margin-bottom: 20px;
  }
  .footer-col:last-child { margin-bottom: 0; }

  /* 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;
  }
}
/* 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;
}