:root {
  --primary-color: #000000;
  --secondary-color: #FFFFFF;
  --login-btn-color: #FCBC45;
  --register-btn-color: #FFFFFF;
  --header-top-bg: var(--primary-color); /* Black */
  --main-nav-bg: var(--secondary-color); /* White */
  --header-text-color: var(--secondary-color); /* White on black header-top */
  --nav-text-color: var(--primary-color); /* Black on white main-nav */
  --footer-bg: var(--primary-color); /* Black */
  --footer-text-color: var(--secondary-color); /* White on black footer */
  --header-offset: 122px; /* Desktop: 68px header-top + 52px main-nav + 2px buffer */
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #333;
  padding-top: var(--header-offset); /* Fixed header offset */
  line-height: 1.6;
}

body.no-scroll {
  overflow: hidden;
}

/* Base styles for anchors and buttons */
a {
  text-decoration: none;
  color: inherit;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: bold;
  text-align: center;
  transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
  text-decoration: none; /* Ensure no underline */
  cursor: pointer;
}

/* Header Styles (Desktop First) */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  background-color: transparent; /* This will be covered by header-top and main-nav */
}

.header-top {
  background-color: var(--header-top-bg); /* Black */
  padding: 15px 0;
  color: var(--header-text-color); /* White */
  min-height: 68px; /* Desktop: 68px */
  display: flex;
  align-items: center;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 30px; /* Desktop padding */
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--header-text-color); /* White */
  text-transform: uppercase;
  white-space: nowrap;
}

.desktop-nav-buttons {
  display: flex; /* Always visible on desktop */
  gap: 12px;
}

.btn-login {
  background-color: var(--login-btn-color); /* #FCBC45 */
  color: var(--primary-color); /* Black text on yellow button */
}

.btn-register {
  background-color: var(--register-btn-color); /* #FFFFFF */
  color: var(--primary-color); /* Black text on white button */
  border: 1px solid var(--primary-color); /* Add border for contrast */
}

.btn-login:hover {
  background-color: #e6a73c; /* Slightly darker yellow */
  box-shadow: 0 0 8px rgba(252, 188, 69, 0.7);
}

.btn-register:hover {
  background-color: #f0f0f0; /* Slightly darker white */
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
}

.main-nav {
  background-color: var(--main-nav-bg); /* White */
  padding: 10px 0;
  min-height: 52px; /* Desktop: 52px */
  display: flex; /* Desktop: visible */
  flex-direction: row; /* Desktop: horizontal */
  align-items: center;
  position: static; /* Desktop: normal flow */
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: center; /* Center nav links */
  align-items: center;
  padding: 0 20px;
  flex-wrap: wrap; /* Allow wrapping on smaller desktop screens */
}

.nav-link {
  color: var(--nav-text-color); /* Black */
  padding: 10px 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.3s ease, background-color 0.3s ease;
}

.nav-link:hover {
  color: var(--login-btn-color); /* Yellow on hover */
}

.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 24px;
  position: relative;
  z-index: 1001; /* Above mobile buttons and overlay */
}

.hamburger-icon {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--header-text-color); /* White */
  margin-bottom: 5px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger-icon:last-child {
  margin-bottom: 0;
}

.hamburger-menu.active .hamburger-icon:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-menu.active .hamburger-icon:nth-child(2) {
  opacity: 0;
}

.hamburger-menu.active .hamburger-icon:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav-buttons {
  display: none; /* Hidden on desktop */
}

.mobile-menu-overlay {
  display: none; /* Hidden on desktop */
}

/* Footer Styles */
.site-footer {
  background-color: var(--footer-bg); /* Black */
  color: var(--footer-text-color); /* White */
  padding: 40px 20px 20px;
  font-size: 14px;
}

.footer-top-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column; /* Default to column for dynamic rows */
  gap: 20px;
}

.footer-dynamic-row {
  width: 100%;
}

.footer-dynamic-row .footer-slot-anchor-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
  min-height: 10px; /* Ensure visibility for slot */
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.footer-col h3 {
  color: var(--secondary-color); /* White */
  font-size: 16px;
  margin-bottom: 15px;
  text-transform: uppercase;
}

.footer-col p {
  line-height: 1.8;
  color: #ccc;
}

.footer-col .footer-logo {
  font-size: 20px;
  font-weight: bold;
  color: var(--secondary-color); /* White */
  text-transform: uppercase;
  display: block;
  margin-bottom: 15px;
}

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

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

.footer-nav a {
  color: #ccc;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: var(--login-btn-color); /* Yellow on hover */
}

.footer-slot-anchor-inner {
  min-height: 10px; /* Ensure these are visible for content injection */
}

.footer-dynamic-col .footer-slot-anchor-inner {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  color: #aaa;
  margin-top: 30px;
}

.footer-bottom p {
  margin: 0;
}

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

  body {
    padding-top: var(--header-offset);
    overflow-x: hidden; /* Mobile overflow protection */
  }

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

  .header-top {
    padding: 10px 0;
    min-height: 60px; /* Mobile: 60px */
  }

  .header-container {
    padding: 0 15px; /* Mobile padding */
    width: 100%;
    max-width: none; /* Important: no max-width on mobile */
    justify-content: space-between; /* Hamburger left, Logo center */
    position: relative;
  }

  .logo {
    font-size: 20px;
    flex: 1 !important; /* Force logo to take available space */
    display: flex !important; /* Use flex for centering */
    justify-content: center !important; /* Center logo horizontally */
    align-items: center !important;
  }

  .logo img { /* If logo is an image */
    display: block !important;
    max-width: 100%;
    height: auto;
    max-height: 40px;
  }

  .desktop-nav-buttons {
    display: none; /* Hide desktop buttons */
  }

  .hamburger-menu {
    display: block; /* Show hamburger on mobile */
    order: -1; /* Place it to the left */
    position: relative;
    z-index: 1001; /* Ensure it's above everything */
  }

  .main-nav {
    display: none; /* Hidden by default */
    flex-direction: column;
    position: fixed;
    top: var(--header-offset); /* Below the fixed header-top and mobile-nav-buttons */
    left: 0;
    width: 80%; /* Menu width */
    max-width: 300px;
    height: calc(100% - var(--header-offset)); /* Full height below header */
    background-color: var(--main-nav-bg); /* White */
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    transform: translateX(-100%); /* Slide out to the left */
    transition: transform 0.3s ease;
    overflow-y: auto; /* Scrollable if content is long */
    padding: 20px 0;
    align-items: flex-start; /* Align nav links to the left */
  }

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

  .nav-container {
    width: 100%;
    max-width: none; /* Important: no max-width on mobile */
    flex-direction: column;
    align-items: flex-start;
    padding: 0 20px;
  }

  .nav-link {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
  }

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

  .mobile-nav-buttons {
    display: flex; /* Show mobile buttons */
    justify-content: center;
    gap: 10px;
    background-color: var(--header-top-bg); /* Same as header-top for continuity */
    padding: 10px 15px;
    position: fixed; /* Fixed below header-top */
    top: 60px; /* Below header-top on mobile (60px) */
    left: 0;
    width: 100%;
    z-index: 990; /* Below hamburger and main-nav */
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    min-height: 48px; /* Mobile: 48px */
  }

  .mobile-nav-buttons .btn {
    flex: 1; /* Make buttons take equal width */
    padding: 8px 15px;
    font-size: 14px;
  }

  .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: 998; /* Below menu, above content */
  }

  .mobile-menu-overlay.active {
    display: block;
  }

  .footer-cols {
    grid-template-columns: 1fr; /* Single column on mobile */
  }
  .footer-col {
    text-align: center;
  }
  .footer-col .footer-logo, .footer-col h3 {
    text-align: center;
  }
  .footer-nav {
    text-align: center;
  }
  .footer-nav li {
    display: block; /* Stack links vertically */
    margin: 0 0 8px 0;
  }
}
/* 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;
  }
}