/* Global Reset & Body Padding */
:root {
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) + 2px buffer */
  --color-primary: #F2C14E;
  --color-accent: #FFD36B;
  --color-button-gradient: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
  --color-card-bg: #111111;
  --color-background: #0A0A0A;
  --color-text-main: #FFF6D6;
  --color-border: #3A2A12;
  --color-glow: #FFD36B;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--color-text-main);
  background-color: var(--color-background);
  padding-top: var(--header-offset); /* Header offset for fixed header */
  overflow-x: hidden; /* Prevent horizontal scroll */
}
body.no-scroll {
  overflow: hidden;
}

/* Site Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000; /* Base header elements */
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

/* Header Top Bar */
.header-top {
  background-color: #1A1A1A; /* Dark background for top bar */
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  overflow: hidden;
  width: 100%;
}

.header-container {
  width: 100%;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px; /* Padding for logo and buttons */
  position: relative; /* For mobile absolute logo */
}

/* Logo */
.logo {
  font-size: 28px;
  font-weight: bold;
  color: var(--color-primary); /* Use primary color for logo text */
  text-decoration: none;
  display: flex;
  align-items: center;
  height: 100%;
  flex-shrink: 0; /* Prevent logo from shrinking on desktop */
}

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

/* Desktop Navigation Buttons */
.desktop-nav-buttons {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-shrink: 0; /* Prevent buttons from shrinking */
}

/* Main Navigation Bar */
.main-nav {
  background-color: var(--color-primary); /* Primary color for main nav */
  min-height: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  overflow: hidden;
  width: 100%;
}

.main-nav .nav-container {
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  padding: 0 20px;
  gap: 25px; /* Spacing between nav links */
}

.nav-link {
  color: #333; /* Dark text for nav links on primary background */
  text-decoration: none;
  font-weight: bold;
  padding: 5px 0;
  transition: color 0.3s ease;
  white-space: nowrap; /* Prevent nav links from wrapping */
}

.nav-link:hover {
  color: #000; /* Even darker on hover */
}

/* Buttons (General) */
.btn {
  background: var(--color-button-gradient);
  color: var(--color-text-main);
  padding: 10px 20px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  white-space: nowrap;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

/* Hamburger Menu (Desktop - hidden) */
.hamburger-menu {
  display: none; /* Hidden by default on desktop */
  width: 30px;
  height: 24px;
  position: relative;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
  z-index: 1003; /* Always on top for interaction */
  padding: 0;
  margin: 0;
  background: none;
  border: none;
  -webkit-appearance: none; /* Remove default button styles */
  -moz-appearance: none;
  appearance: none;
}

.hamburger-menu .bar {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Mobile Overlay */
.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1001; /* Below menu, above header bars */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Navigation Buttons (Desktop - hidden) */
.mobile-nav-buttons {
  display: none; /* Hidden by default on desktop */
  min-height: 48px;
  background-color: #222222; /* A slightly different dark background */
  width: 100%;
  box-sizing: border-box;
  padding: 0 20px; /* Default padding for desktop if it were visible */
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: nowrap;
}

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

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

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

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

.footer-description {
  font-size: 14px;
  line-height: 1.6;
  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: var(--color-text-main);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  font-size: 13px;
  color: #AAAAAA;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  max-width: 1200px;
  margin: 0 auto;
}

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

  /* Header Top Bar */
  .header-top {
    min-height: 60px;
    height: 60px;
    padding: 0 15px; /* Adjust padding for mobile */
  }

  .header-container {
    padding: 0; /* Handled by header-top padding */
    width: 100%;
    max-width: none; /* No max-width on mobile */
    justify-content: space-between;
  }

  /* Logo Centering (Method 2: Absolute positioning) */
  .logo {
    position: absolute !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    max-width: calc(100% - 100px); /* Leave space for hamburger and potential right element */
    height: 100%;
  }

  .logo img {
    max-height: 56px !important; /* Max height for image logo on mobile */
  }

  /* Hamburger Menu (Mobile - visible) */
  .hamburger-menu {
    display: flex;
    margin-right: auto; /* Push logo and buttons to the right */
    position: relative;
    z-index: 1003;
  }

  .hamburger-menu.active .bar:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
  }
  .hamburger-menu.active .bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active .bar:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
  }

  /* Desktop Navigation Buttons (Mobile - hidden) */
  .desktop-nav-buttons {
    display: none !important;
  }

  /* Mobile Navigation Buttons (Mobile - visible) */
  .mobile-nav-buttons {
    display: flex !important; /* Visible on mobile */
    min-height: 48px;
    height: 48px; /* Fixed height for mobile buttons bar */
    align-items: center;
    width: 100%;
    max-width: 100%; /* Ensure it doesn't overflow */
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden; /* Prevent content overflow */
    gap: 10px;
    flex-wrap: nowrap; /* Prevent buttons from wrapping */
    justify-content: center; /* Center buttons if less than 2, or if they are flex:1 */
    background-color: #222222;
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0; /* Allow buttons to shrink */
    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 Bar (Mobile - hidden by default, slide-in) */
  .main-nav {
    min-height: 48px; /* Fixed height for mobile main nav */
    height: 100vh; /* Full viewport height */
    position: fixed;
    top: 0;
    left: 0;
    width: 280px; /* Width of the mobile menu */
    background-color: var(--color-card-bg); /* Dark background for mobile menu */
    transform: translateX(-100%); /* Hidden by default */
    transition: transform 0.3s ease;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.5);
    z-index: 1002; /* Above overlay, below hamburger */
    display: none; /* Hide by default, will be block/flex when active */
    flex-direction: column; /* Vertical links */
    padding-top: 60px; /* Space for fixed header-top */
    overflow-y: auto; /* Enable scrolling for long menus */
  }

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

  .main-nav .nav-container {
    flex-direction: column; /* Vertical links */
    align-items: flex-start; /* Align links to the left */
    padding: 20px 15px;
    gap: 15px; /* Spacing between mobile nav links */
    height: auto;
    max-width: none;
  }

  .nav-link {
    color: var(--color-text-main); /* Light text for mobile menu */
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .nav-link:last-child {
      border-bottom: none;
  }

  /* Footer */
  .site-footer {
    padding-left: 15px;
    padding-right: 15px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column layout on mobile */
    gap: 20px;
  }

  .footer-bottom {
    padding-left: 0;
    padding-right: 0;
  }

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