/* Global Styles */
:root {
  --primary-color: #E53935;
  --secondary-color: #FF5A4F;
  --card-bg-color: #FFFFFF;
  --bg-color: #F5F7FA;
  --text-main-color: #333333;
  --border-color: #E0E0E0;
  --header-offset: 122px; /* 68px (header-top) + 52px (main-nav) + 2px buffer */
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
  background-color: var(--card-bg-color);
}

.header-top {
  box-sizing: border-box;
  height: 68px;
  display: flex;
  align-items: center;
  background-color: var(--bg-color); /* Lighter background for header-top */
  width: 100%;
  overflow: hidden;
}

.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 25px; /* Adjusted padding */
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color);
  display: block;
  line-height: 1;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 5px;
  color: white;
  font-weight: bold;
  text-decoration: none;
  background: linear-gradient(180deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  border: none;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease;
  white-space: nowrap;
}

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

.btn-register {
  /* Specific styling if needed, currently uses general btn style */
}

.btn-login {
  /* Specific styling if needed, currently uses general btn style */
}

.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden by default on desktop */
  min-height: 48px;
  background-color: var(--card-bg-color);
}

.main-nav {
  box-sizing: border-box;
  height: 52px;
  display: flex;
  align-items: center;
  background-color: var(--card-bg-color); /* White background for main-nav */
  width: 100%;
  overflow: hidden;
}

.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;
  flex-wrap: wrap;
}

.nav-link {
  display: block;
  padding: 0 15px;
  font-weight: bold;
  color: var(--text-main-color);
  line-height: 52px; /* Match main-nav height for vertical alignment */
  transition: color 0.3s ease;
  white-space: nowrap;
}

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

.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 1001;
}

.hamburger-menu .bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-main-color);
  margin: 5px auto;
  transition: all 0.3s ease-in-out;
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 998;
}

/* Footer Styles */
.site-footer {
  background-color: var(--bg-color);
  color: var(--text-main-color);
  padding: 40px 20px 20px;
  border-top: 1px solid var(--border-color);
}

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

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

.footer-logo {
  font-size: 22px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 15px;
  display: block;
}

.footer-description {
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.footer-title {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 15px;
  color: var(--text-main-color);
}

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

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

.footer-nav a {
  color: var(--text-main-color);
  font-size: 14px;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: #666;
}

.footer-bottom p {
  margin: 0;
}

.footer-slot-anchor-inner { display: none; } /* Hidden by default, only for system injection */

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

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

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

  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }

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

  .header-container {
    padding: 0 15px;
    position: relative;
  }

  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 20px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    max-width: calc(100% - 100px);
  }

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

  .mobile-nav-buttons {
    display: flex !important;
    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);
  }

  .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;
  }

  .hamburger-menu {
    display: block;
    order: -1; /* Place hamburger menu on the left */
    margin-right: auto;
  }

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

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

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

  .main-nav {
    display: none; /* Hidden by default */
    flex-direction: column;
    position: fixed;
    top: var(--header-offset); /* Position below the header */
    left: 0;
    width: 250px; /* Adjust as needed */
    height: calc(100% - var(--header-offset));
    background-color: var(--card-bg-color);
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.2);
    transform: translateX(-100%); /* Start off-screen */
    transition: transform 0.3s ease-in-out;
    z-index: 999;
    overflow-y: auto;
    align-items: flex-start;
    height: auto; /* Allow content to define height */
    max-height: calc(100vh - var(--header-offset)); /* Limit max height to viewport */
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0;
    width: 100%;
    height: auto;
  }

  .nav-link {
    padding: 10px 0;
    width: 100%;
    line-height: normal;
    border-bottom: 1px solid var(--border-color);
  }

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

  .overlay.active {
    display: block;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-col {
    text-align: center;
  }

  .footer-nav {
    padding: 0;
  }

  .footer-nav li {
    display: inline-block; /* For horizontal layout in mobile footer */
    margin: 0 10px 8px 10px;
  }
  .footer-nav a {
    white-space: nowrap;
  }
}
/* 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;
  }
}