html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #F3F8FF;
  background-color: #08162B;
  line-height: 1.6;
  padding-top: var(--header-offset);
  overflow-x: hidden;
}

:root {
  --primary-color: #113B7A;
  --secondary-color: #1D5FD1;
  --card-bg: #10233F;
  --text-main: #F3F8FF;
  --text-secondary: #AFC4E8;
  --border-color: #244D84;
  --glow-color: #4FA8FF;
  --gold-color: #F2C14E;
  --divider-color: #1B3357;
  --deep-navy: #08162B;
  --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --header-offset: 122px; /* Desktop: 68px (header-top) + 52px (main-nav) */
}

/* Header Styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  background-color: var(--deep-navy); /* Base for header, specific sections will override */
}

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

.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-left: 20px;
  padding-right: 20px;
}

.logo {
  color: var(--text-main);
  font-size: 28px;
  font-weight: bold;
  text-decoration: none;
  display: block;
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
}

.logo img {
  display: block;
  max-height: 60px; /* Desktop logo height */
  height: auto;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

.desktop-nav-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  background: var(--button-gradient);
  color: var(--text-main);
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  white-space: nowrap;
  transition: background 0.3s ease;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:hover {
  filter: brightness(1.1);
}

.mobile-nav-buttons {
  display: none; /* Hidden by default on desktop */
  background-color: var(--card-bg);
  padding: 10px 20px;
}

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

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

.nav-link {
  color: var(--text-main);
  text-decoration: none;
  padding: 10px 15px;
  white-space: nowrap;
  transition: color 0.3s ease, background-color 0.3s ease;
  font-size: 16px;
  line-height: 1;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

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

.hamburger-menu .bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-main);
  margin: 5px 0;
  transition: 0.4s;
}

.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);
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 999;
  transition: opacity 0.3s ease;
  opacity: 0;
}

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

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

.site-footer h3 {
  color: var(--text-main);
  font-size: 18px;
  margin-bottom: 20px;
}

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

.footer-col {
  padding: 10px 0;
}

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

.footer-description {
  margin-bottom: 15px;
  line-height: 1.8;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.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(--glow-color);
}

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

.footer-dynamic-row {
  max-width: 1200px;
  margin: 0 auto 20px;
}

.footer-dynamic-row .footer-slot-anchor-inner {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
}

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

.footer-bottom p {
  margin: 0;
}

/* Responsive Styles */
@media (max-width: 768px) {
  :root {
    --header-offset: 110px; /* Mobile: 60px (header-top) + 48px (mobile-nav-buttons) + 48px (main-nav) = 156px - no, its 60+48=108px for header-top and main-nav. mobile-nav-buttons is between them.*/
    --header-offset: 158px; /* Mobile: 60px (header-top) + 48px (mobile-nav-buttons) + 48px (main-nav) */
  }

  /* Mobile content overflow 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;
  }

  .header-top {
    height: 60px; /* Mobile height */
  }

  .header-container {
    padding-left: 15px;
    padding-right: 15px;
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    justify-content: space-between;
  }

  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    max-width: calc(100% - 100px); /* Account for hamburger menu width */
  }

  .logo img {
    max-height: 56px !important; /* Mobile logo height */
  }

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

  .hamburger-menu {
    display: block;
    order: -1; /* Move hamburger to the left */
    margin-right: auto;
  }
  
  .header-container .hamburger-menu ~ .logo {
    margin-left: -40px; /* Adjust logo position to center it better with hamburger on left */
  }

  .header-container .desktop-nav-buttons {
    display: none;
  }

  .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;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    justify-content: center;
    background-color: var(--card-bg);
  }

  .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;
  }

  .main-nav {
    display: none; /* Hide main nav by default on mobile */
    position: fixed;
    top: var(--header-offset);
    left: 0;
    width: 250px;
    height: calc(100% - var(--header-offset));
    flex-direction: column; /* Vertical menu on mobile */
    align-items: flex-start;
    background-color: var(--deep-navy);
    transform: translateX(-100%); /* Slide out from left */
    transition: transform 0.3s ease;
    padding-top: 20px;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 15px;
    width: 100%;
    max-width: none; /* Remove max-width on mobile */
    height: auto;
  }

  .nav-link {
    width: 100%;
    padding: 12px 15px;
    border-bottom: 1px solid var(--divider-color);
  }

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

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

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

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

  .footer-nav {
    padding-left: 0;
  }

  .footer-nav li {
    text-align: center;
  }

  .footer-dynamic-col .footer-slot-anchor-inner,
  .footer-dynamic-row .footer-slot-anchor-inner {
    justify-content: center;
  }
}
/* 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;
  }
}