:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --header-top-bg: #000000; /* Dark contrast for header top */
  --main-nav-bg: #26A9E0; /* Primary color for main nav */
  --btn-login-bg: #EA7C07; /* Login button color */
  --header-offset: 122px; /* 68px (header-top) + 52px (main-nav) + 2px safety */
}

body {
  padding-top: var(--header-offset);
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  overflow-x: hidden; /* Prevent horizontal scroll for body */
}

.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 or outer header background */
}

/* Header Top Section (Desktop) */
.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px; /* Fixed height for desktop */
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--header-top-bg);
  width: 100%;
  padding: 0 20px; /* Outer padding for small screens before container max-width kicks in */
}

.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;
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--secondary-color);
  text-decoration: none;
  line-height: 1;
  display: block; /* Ensures it takes up space and aligns */
  white-space: nowrap; /* Prevent logo text from wrapping */
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px; /* Limit logo width */
}

/* If logo is an image */
.logo img {
  display: block;
  max-height: 60px; /* Max height for desktop logo */
  height: auto;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

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

.btn {
  padding: 10px 18px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  font-size: 15px;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
  display: inline-flex; /* Use flex for button content alignment */
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  color: var(--secondary-color);
}

.btn-register {
  background-color: var(--primary-color);
  box-shadow: 0 3px 6px rgba(38, 169, 224, 0.3);
}

.btn-register:hover {
  background-color: #1a8fbb; /* A slightly darker primary */
  transform: translateY(-1px);
  box-shadow: 0 5px 10px rgba(38, 169, 224, 0.4);
}

.btn-login {
  background-color: var(--btn-login-bg);
  box-shadow: 0 3px 6px rgba(234, 124, 7, 0.3);
}

.btn-login:hover {
  background-color: #c96b06; /* A slightly darker login color */
  transform: translateY(-1px);
  box-shadow: 0 5px 10px rgba(234, 124, 7, 0.4);
}

/* Hamburger Menu (Hidden on Desktop) */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  cursor: pointer;
  z-index: 1001;
  padding: 5px; /* Make it easier to click */
  box-sizing: content-box;
}

.hamburger-menu span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--secondary-color);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* Main Navigation Section (Desktop) */
.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px; /* Fixed height for desktop */
  display: flex; /* Display flex for desktop */
  align-items: center;
  overflow: hidden;
  background-color: var(--main-nav-bg);
  width: 100%;
  position: static; /* Default static for desktop */
}

.nav-container {
  box-sizing: border-box;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row; /* Horizontal for desktop */
  justify-content: center;
  align-items: center;
  padding: 0 20px;
  width: 100%;
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 25px; /* Spacing between menu items */
}

.main-nav ul li a {
  color: var(--secondary-color);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  padding: 5px 0;
  transition: color 0.3s ease, border-bottom 0.3s ease;
  white-space: nowrap; /* Prevent menu items from wrapping */
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
  color: #cceeff; /* Lighter shade of primary */
  border-bottom: 2px solid var(--secondary-color);
}

/* Mobile Navigation Buttons (Hidden on Desktop) */
.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden on desktop by default */
  min-height: 48px; /* Minimum height for mobile buttons */
  width: 100%;
  background-color: var(--header-top-bg); /* Match header top background */
  padding: 0 15px; /* Mobile padding */
}

/* Footer Styles */
.site-footer {
  background-color: #222;
  color: #ccc;
  padding: 40px 0 20px;
  font-size: 14px;
}

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

.footer-col h3 {
  color: var(--secondary-color);
  font-size: 18px;
  margin-bottom: 15px;
  white-space: nowrap;
}

.footer-col p {
  line-height: 1.8;
  color: #aaa;
  word-wrap: break-word; /* Ensure description wraps */
  overflow-wrap: break-word;
}

.footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

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

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

.footer-nav li a {
  color: #aaa;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid #333;
  text-align: center;
  padding-top: 20px;
  margin-top: 30px;
  color: #888;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.footer-bottom p {
  margin: 0;
}

/* Dynamic slot anchor inner container */
.footer-slot-anchor-inner {
  min-height: 10px; /* Ensure it has some height even if empty */
}

/* Overlay for mobile menu */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none; /* Hidden by default */
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

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

  /* Prevent body scroll when menu is open */
  body.no-scroll {
    overflow: hidden;
  }

  /* Header Top Section (Mobile) */
  .header-top {
    min-height: 60px !important;
    height: 60px !important; /* Fixed height for mobile */
    padding: 0 15px; /* Mobile padding */
  }

  .header-container {
    width: 100%;
    max-width: none; /* No max-width on mobile */
    padding: 0; /* Padding moved to .header-top */
    justify-content: space-between; /* Space between hamburger and logo/buttons */
    position: relative; /* For absolute logo centering if needed */
  }

  .hamburger-menu {
    display: flex; /* Show hamburger menu on mobile */
    order: -1; /* Place it at the beginning */
  }

  /* Mobile Logo Centering (Method 1: Flexbox) */
  .logo {
    flex: 1 !important; /* Take up available space for centering */
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    position: static !important; /* Override potential absolute positioning */
    transform: none !important; /* Override potential transform */
    max-width: calc(100% - 70px); /* Adjust max-width to not overlap hamburger/buttons */
  }
  .logo img {
    max-height: 56px !important; /* Max height for mobile logo */
  }

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

  /* Mobile Navigation Buttons (Visible on Mobile) */
  .mobile-nav-buttons {
    display: flex !important; /* Show mobile buttons on mobile */
    min-height: 48px;
    height: auto; /* Allow height to adjust if text wraps */
    align-items: center;
    justify-content: center; /* Center buttons horizontally */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden; /* Prevent overflow */
    gap: 10px;
    flex-wrap: nowrap; /* Keep buttons on one line */
    background-color: var(--header-top-bg); /* Match header top */
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* Max width for 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 Section (Mobile) */
  .main-nav {
    display: none; /* Hidden by default on mobile */
    position: fixed; /* Fixed position for mobile menu */
    top: var(--header-offset); /* Position below fixed header */
    left: 0;
    width: 75%; /* Slide-out menu width */
    max-width: 300px; /* Max width for slide-out menu */
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: #333; /* Darker background for mobile menu */
    flex-direction: column; /* Vertical for mobile */
    transform: translateX(-100%); /* Slide out from left */
    transition: transform 0.3s ease;
    z-index: 1001; /* Above overlay */
    padding: 20px 0;
    box-sizing: border-box;
    overflow-y: auto; /* Enable scrolling for long menus */
  }

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

  .nav-container {
    width: 100%;
    max-width: none; /* No max-width on mobile */
    padding: 0; /* No padding on container, use list item padding */
    justify-content: flex-start; /* Align menu items to start */
  }

  .main-nav ul {
    flex-direction: column; /* Vertical menu items */
    width: 100%;
    gap: 0; /* No gap for vertical list */
  }

  .main-nav ul li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1); /* Separator */
  }

  .main-nav ul li:last-child {
    border-bottom: none;
  }

  .main-nav ul li a {
    padding: 12px 20px;
    display: block; /* Make links full width */
    color: var(--secondary-color);
    font-size: 16px;
  }

  .main-nav ul li a:hover,
  .main-nav ul li a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--primary-color);
    border-bottom: none; /* No bottom border on mobile hover */
  }

  /* Hamburger animation */
  .hamburger-menu.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
  }
  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
  }

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

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

  .footer-bottom {
    padding-left: 15px;
    padding-right: 15px;
  }

  /* Mobile content area 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;
}