:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --login-button-color: #EA7C07;
  --text-color-dark: #000000;
  --text-color-light: #FFFFFF;
  --header-offset: 122px; /* Desktop: header-top (68px) + mobile-nav-buttons (0) + main-nav (52px) + 2px buffer */
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  line-height: 1.6;
  color: var(--text-color-dark);
  padding-top: var(--header-offset); /* Fixed header offset */
  overflow-x: hidden; /* Prevent horizontal scroll on desktop */
}

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

/* Header styles */
.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: var(--secondary-color); /* Fallback, specific colors for header-top/main-nav */
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--primary-color); /* Header-top uses primary color */
  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 {
  font-size: 28px;
  font-weight: bold;
  color: var(--text-color-light);
  text-decoration: none;
  display: block; /* Ensure it's visible */
  white-space: nowrap;
}

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

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

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #1e87b0; /* Slightly darker primary color for contrast with header-top */
  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: 20px;
}

.nav-link {
  color: var(--text-color-light);
  font-weight: bold;
  padding: 5px 0;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active-nav-link {
  color: #cceeff; /* Lighter shade for hover and active */
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.2s ease;
  white-space: nowrap;
  box-sizing: border-box;
  color: var(--text-color-light); /* Default white text for buttons */
}

.btn-register {
  background-color: var(--login-button-color); /* Orange for register */
}

.btn-login {
  background-color: #007bff; /* A distinct blue for login, contrasting with primary */
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

/* Hamburger menu for mobile */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  cursor: pointer;
  padding: 10px;
  z-index: 1001; /* Higher than header */
  position: relative;
  margin-right: 15px; /* Space between hamburger and logo on mobile */
}

.hamburger-menu .bar1, .hamburger-menu .bar2, .hamburger-menu .bar3 {
  width: 25px;
  height: 3px;
  background-color: var(--text-color-light);
  margin: 5px 0;
  transition: 0.4s;
  border-radius: 2px;
}

.hamburger-menu.active .bar1 {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger-menu.active .bar2 {
  opacity: 0;
}

.hamburger-menu.active .bar3 {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* 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: 999; /* Below hamburger and menu */
}

.overlay.active {
  display: block;
}

/* Footer styles */
.site-footer {
  background-color: #333;
  color: #ccc;
  padding: 40px 20px;
  font-size: 14px;
}

.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-color-light);
  font-size: 16px;
  margin-bottom: 15px;
}

.footer-col .footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--text-color-light);
  margin-bottom: 15px;
  display: block;
}

.footer-col .footer-description {
  line-height: 1.8;
  color: #aaa;
  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: #ccc;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid #444;
  text-align: center;
  color: #888;
}

.footer-bottom p {
  margin: 0;
}

/* Ensure footer slot anchors are visible for injection */
.footer-slot-anchor-inner {
  /* Should not hide injected content */
}

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

  body {
    padding-top: var(--header-offset);
    overflow-x: hidden; /* Prevent horizontal scroll */
  }

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

  .header-container {
    width: 100%;
    max-width: none; /* Remove max-width for mobile */
    padding: 0 15px; /* Smaller padding for mobile */
    justify-content: space-between; /* To push hamburger left, logo center, empty space right */
  }

  .hamburger-menu {
    display: block; /* Show hamburger on mobile */
    order: 0; /* Place hamburger first */
  }

  .logo {
    flex: 1; /* Allow logo to take available space */
    text-align: center; /* Center text if it's a text logo */
    display: flex; /* Use flex to center if it contains img or specific elements */
    justify-content: center;
    align-items: center;
    font-size: 24px;
    order: 1; /* Place logo second */
  }

  /* Create an empty div to push logo to center if hamburger is present */
  .header-container::after {
    content: '';
    display: block;
    width: 45px; /* Match hamburger width + padding */
    order: 2; /* Place after logo */
  }

  .desktop-nav-buttons {
    display: none !important; /* Hide desktop buttons on mobile */
  }

  .mobile-nav-buttons {
    display: flex !important; /* Show mobile buttons */
    min-height: 48px;
    align-items: center;
    justify-content: center; /* Center buttons */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap; /* Ensure buttons stay on one line */
    background-color: #222; /* Dark background for mobile buttons */
  }

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

  .main-nav {
    display: none; /* Hidden by default on mobile */
    flex-direction: column;
    position: fixed;
    top: var(--header-offset); /* Position below fixed header */
    left: 0;
    width: 280px; /* Sidebar width */
    height: calc(100% - var(--header-offset)); /* Fill remaining height */
    background-color: #333; /* Dark background for mobile menu */
    transform: translateX(-100%); /* Off-screen by default */
    transition: transform 0.3s ease;
    overflow-y: auto; /* Allow scrolling for long menus */
    z-index: 1001; /* Higher than header */
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 15px;
    gap: 10px;
  }

  .nav-link {
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid #444;
  }

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

  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column for mobile */
    padding: 0 15px;
  }

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

  .footer-bottom {
    padding: 15px;
  }

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