/* Global Reset and Body */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header Offset - MUST be here */
:root {
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) = 120px, add 2px buffer */
}
body {
  padding-top: var(--header-offset);
}

/* Site Header - Fixed position */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  background-color: #FFFFFF; /* Overall header background, sections will override */
  box-sizing: border-box;
}

/* Header Top Section */
.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #1a7bb5; /* Darker primary for contrast */
  width: 100%;
  color: #FFFFFF;
}

.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: 28px;
  font-weight: bold;
  color: #FFFFFF;
  text-decoration: none;
  display: flex; /* For potential image logo alignment */
  align-items: center;
  height: 100%;
}
.logo img {
  display: block;
  max-height: 60px;
  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 on desktop */
  min-height: 48px; /* Fixed height for mobile */
  background-color: #f0f0f0; /* Light background for mobile buttons */
  width: 100%;
  padding: 8px 15px; /* Added padding for mobile buttons */
  justify-content: center; /* Center buttons horizontally */
  align-items: center;
  gap: 10px;
}

/* Main Navigation */
.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex; /* Desktop: visible, horizontal */
  align-items: center;
  overflow: hidden;
  background-color: #26A9E0; /* Primary 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;
  text-decoration: none;
  padding: 10px 15px;
  font-size: 16px;
  white-space: nowrap;
  transition: background-color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

/* Hamburger Menu (hidden on desktop) */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 1001; /* Above header-top */
}

.hamburger-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #FFFFFF;
  position: relative;
  transition: background-color 0.3s ease;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background-color: #FFFFFF;
  position: absolute;
  left: 0;
  transition: transform 0.3s ease;
}

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

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

/* Hamburger menu active state */
.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 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;
}
.overlay.active {
  display: block;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
  box-sizing: border-box;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-register {
  background-color: #26A9E0; /* Primary color */
  color: #FFFFFF;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-login {
  background-color: #EA7C07; /* Custom Login color */
  color: #FFFFFF;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Footer Styles */
.site-footer {
  background-color: #1a7bb5; /* Darker primary for footer */
  color: #FFFFFF;
  padding: 40px 20px 20px;
  font-size: 14px;
  box-sizing: border-box;
}

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

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

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

.footer-description {
  margin-bottom: 15px;
  line-height: 1.8;
  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: #FFFFFF;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: #f0f0f0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 20px;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-bottom p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
}

/* Dynamic slot anchor inner containers */
.footer-slot-anchor-inner {
  min-height: 1px; /* Ensure they take up space if empty */
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
  /* Header Offset for mobile */
  :root {
    --header-offset: 110px; /* Mobile: 60px (header-top) + 48px (mobile-nav-buttons) = 108px, add 2px buffer */
  }

  /* Header Top Mobile */
  .header-top {
    min-height: 60px !important;
    height: 60px !important;
    justify-content: space-between; /* To push hamburger left and logo center */
  }

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

  .logo {
    flex: 1 !important; /* Allow logo to take flexible space */
    display: flex !important;
    justify-content: center !important; /* Center logo */
    align-items: center !important;
    order: 2; /* Place logo in the middle */
    font-size: 24px; /* Smaller font size */
  }
  .logo img {
    max-height: 56px !important; /* Smaller max height for mobile */
  }

  /* Hamburger Menu Mobile */
  .hamburger-menu {
    display: block; /* Show hamburger on mobile */
    order: 1; /* Place hamburger on the left */
  }

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

  /* Mobile Navigation Buttons */
  .mobile-nav-buttons {
    display: flex !important; /* Show mobile buttons */
    min-height: 48px;
    align-items: center;
    width: 100%; max-width: 100%;
    box-sizing: border-box;
    padding-left: 15px; padding-right: 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap; /* Ensure buttons stay in one line */
    background-color: #f0f0f0; /* Light background for mobile buttons */
  }

  .mobile-nav-buttons .btn {
    flex: 1; min-width: 0;
    max-width: calc(50% - 5px); /* Two buttons with 10px gap */
    box-sizing: border-box;
    padding: 8px 12px;
    font-size: 13px;
    white-space: normal; /* Allow text to wrap */
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  /* Main Navigation Mobile (hidden by default, slides in) */
  .main-nav {
    display: none; /* Hidden by default */
    position: fixed;
    top: var(--header-offset); /* Position below fixed header and mobile buttons */
    left: 0;
    width: 80%; /* Menu width */
    max-width: 300px;
    height: calc(100% - var(--header-offset)); /* Full height below header */
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 20px 0;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Slide out of view */
    transition: transform 0.3s ease;
    background-color: #26A9E0; /* Primary color */
    z-index: 1001; /* Above overlay */
    overflow-y: auto; /* Enable scrolling for long menus */
  }

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

  .nav-container {
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    flex-direction: column;
    align-items: flex-start;
    padding: 0 15px;
  }

  .nav-link {
    width: 100%;
    padding: 12px 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 16px;
  }
  .nav-link:last-child {
    border-bottom: none;
  }

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

  /* Footer Mobile */
  .site-footer {
    padding: 30px 15px 15px;
  }
  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column layout for footer */
    gap: 20px;
  }
  .footer-col {
    text-align: center;
  }
  .footer-col h3 {
    margin-bottom: 10px;
  }
  .footer-nav li {
    margin-bottom: 5px;
  }
  .footer-logo {
    margin-bottom: 10px;
  }
}

/* No scroll for body when menu is open */
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;
  }
}