:root {
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) + 2px buffer */
  --primary-color: #11A84E;
  --auxiliary-color: #22C768;
  --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --card-bg: #11271B;
  --background-color: #08160F;
  --text-main: #F2FFF6;
  --text-secondary: #A7D9B8;
  --border-color: #2E7A4E;
  --glow-color: #57E38D;
  --gold-color: #F2C14E;
  --divider-color: #1E3A2A;
  --deep-green: #0A4B2C;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-main);
  background-color: var(--background-color);
  padding-top: var(--header-offset);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Header Styles --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  background-color: var(--deep-green); /* Header background */
  box-sizing: border-box;
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--deep-green);
  width: 100%;
  padding: 0 20px; /* Default padding for desktop */
}

.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(--gold-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  height: 100%;
  white-space: nowrap;
}

.logo img {
  display: block;
  max-height: 60px;
  height: auto;
  width: auto;
  max-width: 280px;
  object-fit: contain;
}

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

.mobile-nav-buttons {
  box-sizing: border-box;
  display: none; /* Hidden by default on desktop */
  min-height: 48px; /* Placeholder height, will be flex on mobile */
  background-color: var(--card-bg); /* Distinct background for mobile buttons */
  width: 100%;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--button-gradient);
  color: var(--text-main); /* Button text color */
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--card-bg); /* Distinct from header-top */
  width: 100%;
  padding: 0 20px; /* Default padding for desktop */
}

.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;
  gap: 25px; /* Spacing between desktop nav links */
}

.nav-link {
  color: var(--text-main);
  text-decoration: none;
  padding: 8px 0;
  position: relative;
  font-size: 15px;
  white-space: nowrap;
  transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold-color); /* Gold on hover and active */
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--gold-color);
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
  left: 0;
}

/* Hamburger Menu */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  position: relative;
  z-index: 1002; /* Above other header elements */
}

.hamburger-menu span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  transition: all 0.3s ease-in-out;
}

.hamburger-menu.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

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

.hamburger-menu.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.mobile-header-spacer {
  display: none; /* Hidden on desktop */
}

/* Overlay for mobile menu */
.overlay {
  display: none; /* Hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 999; /* Below menu, above page content */
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

/* --- Footer Styles --- */
.site-footer {
  background-color: var(--background-color); /* Darkest background */
  color: var(--text-secondary);
  padding: 40px 20px;
  font-size: 14px;
  line-height: 1.6;
  box-sizing: border-box;
}

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

.footer-col {
  box-sizing: border-box;
}

.footer-logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--gold-color);
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

.footer-description {
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--text-secondary);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.site-footer h3 {
  color: var(--text-main);
  font-size: 18px;
  margin-top: 0;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color); /* Subtle border for titles */
  padding-bottom: 10px;
}

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

.footer-nav li {
  margin-bottom: 10px;
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--divider-color);
  color: var(--text-secondary);
}

.footer-bottom p {
  margin: 0;
}

/* Dynamic Slot Anchors - ensure they are visible and not hidden */
.footer-slot-anchor-inner {
  min-height: 1px; /* Ensure visibility if empty */
}

/* --- Responsive 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 Header Top */
  .header-top {
    min-height: 60px !important;
    height: 60px !important;
    padding: 0 15px; /* Smaller padding for mobile */
  }

  .header-container {
    width: 100%;
    max-width: none;
    padding: 0;
    justify-content: space-between;
  }

  .hamburger-menu {
    display: flex; /* Show hamburger on mobile */
    order: 1; /* First item in flex order */
  }

  .logo {
    order: 2; /* Second item */
    flex-grow: 1 !important; /* Allow logo to take available space */
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    height: 100%;
    position: static !important; /* Ensure it's not absolutely positioned */
    transform: none !important; /* Remove transform */
    max-width: 100%;
  }

  .logo img {
    max-height: 56px !important; /* Smaller logo for mobile */
    max-width: 100%;
  }

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

  .mobile-header-spacer {
    display: block;
    width: 30px; /* Match hamburger width for balance */
    order: 3; /* Third item */
  }

  /* Mobile Buttons Section */
  .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; /* Smaller padding */
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    justify-content: center; /* Center buttons if only one, or for two if space allows */
    background-color: var(--card-bg);
  }

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

  /* Mobile Main Nav (Hamburger Menu Content) */
  .main-nav {
    display: none; /* Hidden by default for mobile menu */
    position: fixed;
    top: var(--header-offset); /* Position below fixed header */
    left: 0;
    width: 70%; /* Adjust width as needed for slide-out effect */
    max-width: 300px;
    height: calc(100% - var(--header-offset)); /* Fill remaining height */
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    background-color: var(--card-bg); /* Same as desktop main-nav */
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.3);
    transform: translateX(-100%); /* Slide out from left */
    transition: transform 0.3s ease;
    z-index: 1001; /* Above overlay, below hamburger */
    overflow-y: auto; /* Enable scrolling for long menus */
    box-sizing: border-box;
  }

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

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

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

  .nav-link::after {
    display: none; /* No underline animation on mobile */
  }

  /* Mobile Footer */
  .site-footer {
    padding: 30px 15px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column for mobile */
    gap: 25px;
    margin-bottom: 25px;
  }
  
  /* 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;
  }
}