:root {
  --primary-color: #2F6BFF;
  --secondary-color: #6FA3FF;
  --text-main-color: #1F2D3D;
  --text-black-color: #000000;
  --card-bg-color: #FFFFFF;
  --bg-color: #F4F7FB;
  --border-color: #D6E2FF;
  --glow-color: #A5C4FF;
  --header-offset: 122px;
}

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

.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;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #1F52CC; /* Darker variant of primary 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 {
  font-size: 28px;
  font-weight: bold;
  color: #FFFFFF;
  text-decoration: none;
  display: flex;
  align-items: center;
  height: 100%;
}

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

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

.btn {
  padding: 10px 18px;
  border-radius: 25px;
  font-weight: bold;
  text-decoration: none;
  color: var(--text-black-color); /* Changed to black for WCAG AA contrast */
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-register {
  background: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
  color: #FFFFFF; /* Retained white for register button as it's a primary action and custom color specified it. Will assume the prompt's explicit color:white overrides WCAG AA for this specific element if it's a critical brand color, but contrast is still a concern. However, the text color rule for Custom Color_1776249996415 is #000000. For buttons, it says 'color: white'. This is a conflict. Prioritizing the 'Button color rule' which states 'color: white' for buttons. */
}

.btn-login {
  background: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
  color: #FFFFFF; /* Same as above */
}

.btn:hover {
  opacity: 0.9;
  box-shadow: 0 0 10px var(--glow-color);
}

.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden by default for desktop */
  min-height: 48px; /* Placeholder for mobile height */
}

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--primary-color); /* Primary color for main navigation */
  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;
  gap: 25px;
}

.nav-link {
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  padding: 5px 0;
  white-space: nowrap;
  transition: color 0.3s ease;
}

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

.hamburger-menu {
  display: none; /* Hidden by default for desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1002;
  position: relative;
  width: 40px;
  height: 40px;
}

.hamburger-icon {
  display: block;
  width: 25px;
  height: 3px;
  background-color: #FFFFFF;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: '';
  display: block;
  width: 25px;
  height: 3px;
  background-color: #FFFFFF;
  position: absolute;
  transition: all 0.3s ease;
}

.hamburger-icon::before {
  top: -8px;
}

.hamburger-icon::after {
  top: 8px;
}

.hamburger-menu.active .hamburger-icon {
  background-color: transparent;
}

.hamburger-menu.active .hamburger-icon::before {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-menu.active .hamburger-icon::after {
  transform: translateY(-8px) rotate(-45deg);
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  transition: opacity 0.3s ease;
  opacity: 0;
}

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

.site-footer {
  background-color: #1F2D3D; /* Dark background for footer */
  color: #FFFFFF;
  padding: 40px 0 20px;
  font-size: 14px;
  line-height: 1.8;
}

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

.footer-col {
  padding-bottom: 20px;
}

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

.footer-description {
  color: #C0C0C0;
  margin-top: 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.site-footer h3 {
  font-size: 18px;
  color: #FFFFFF;
  margin-bottom: 15px;
  font-weight: 600;
}

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

.footer-nav li a {
  color: #C0C0C0;
  text-decoration: none;
  display: block;
  padding: 5px 0;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  margin-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #C0C0C0;
}

.footer-bottom p {
  margin: 0;
}

.footer-slot-anchor-inner {
  /* Ensures anchor elements are visible for content injection */
  min-height: 1px;
  min-width: 1px;
}

/* ==================== Mobile Styles ==================== */
@media (max-width: 768px) {
  :root {
    --header-offset: 110px;
  }

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

  .header-container {
    width: 100%;
    max-width: none;
    padding: 0 15px;
    position: relative; /* For absolute positioning of logo if needed */
  }

  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    height: 100%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    max-width: calc(100% - 100px); /* Adjust for hamburger menu */
  }

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

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

  .hamburger-menu {
    display: block;
    position: relative;
    z-index: 2;
    margin-left: -10px; /* Adjust to align with edge */
  }

  .main-nav {
    min-height: 48px !important;
    height: 48px !important;
    display: none; /* Hidden by default for mobile */
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: #1F2D3D; /* Dark background for mobile menu */
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    padding-top: calc(var(--header-offset) + 20px); /* Adjust for fixed header and buttons */
    box-sizing: border-box;
    z-index: 1001;
    overflow-y: auto;
  }

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

  .nav-container {
    width: 100%;
    max-width: none;
    padding: 20px 15px;
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    height: auto; /* Allow content to dictate height */
  }

  .nav-link {
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

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

  .mobile-nav-buttons {
    display: flex !important; /* Always visible on mobile */
    min-height: 48px;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    background-color: var(--card-bg-color); /* White background for mobile buttons */
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  }

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

  .site-footer {
    padding: 30px 0 15px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 0 15px;
  }

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

  .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;
}