:root {
  --primary-color: #E53935;
  --secondary-color: #FF5A4F;
  --text-main-color: #333333;
  --card-bg-color: #FFFFFF;
  --background-color: #F5F7FA;
  --border-color: #E0E0E0;
  --header-top-bg: #B71C1C; /* Darker red for header-top */
  --main-nav-bg: #E53935; /* Primary color for main-nav */
  --header-offset: 122px; /* 68px (header-top) + 52px (main-nav) + 2px safety */
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-main-color);
  background-color: var(--background-color);
  padding-top: var(--header-offset);
  overflow-x: hidden;
}

/* Shared Header Styles */
.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);
  box-sizing: border-box;
  overflow-x: hidden;
}

.header-top {
  box-sizing: border-box;
  min-height: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  background-color: var(--header-top-bg);
  color: #FFFFFF;
  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: 0 20px;
}

.logo {
  font-size: 28px;
  font-weight: bold;
  color: #FFFFFF;
  text-decoration: none;
  display: block;
  line-height: 1;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 25px;
  text-decoration: none;
  color: #FFFFFF;
  font-weight: bold;
  font-size: 15px;
  background: linear-gradient(180deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  transition: background 0.3s ease, transform 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.mobile-nav-buttons {
  display: none; /* Hidden by default, shown in mobile media query */
  background-color: var(--header-top-bg);
}

.main-nav {
  box-sizing: border-box;
  min-height: 52px;
  height: 52px;
  display: flex; /* Desktop default */
  flex-direction: row; /* Desktop default */
  position: static; /* Desktop default */
  align-items: center;
  background-color: var(--main-nav-bg);
  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;
  gap: 25px;
}

.nav-link {
  color: #FFFFFF;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
  padding: 5px 0;
  white-space: nowrap;
  transition: color 0.3s ease;
}

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

.hamburger-menu {
  display: none; /* Hidden by default, shown in mobile media query */
  width: 30px;
  height: 24px;
  position: relative;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-menu span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #FFFFFF;
  border-radius: 2px;
  position: absolute;
  left: 0;
  transition: all 0.3s ease;
}

.hamburger-menu span:nth-child(1) { top: 0; }
.hamburger-menu span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger-menu span:nth-child(3) { bottom: 0; }

.hamburger-menu.active span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

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

.hamburger-menu.active span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
  transition: opacity 0.3s ease;
  opacity: 0;
}

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

/* Shared Footer Styles */
.site-footer {
  background-color: #333333;
  color: #CCCCCC;
  padding: 40px 20px;
  font-size: 14px;
  line-height: 1.8;
  box-sizing: border-box;
}

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

.footer-col h3 {
  color: #FFFFFF;
  font-size: 18px;
  margin-bottom: 15px;
}

.footer-col .footer-logo {
  font-size: 24px;
  font-weight: bold;
  color: #FFFFFF;
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

.footer-col .footer-description {
  color: #AAAAAA;
  margin-bottom: 15px;
  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(--secondary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  color: #FFFFFF;
}

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

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

.footer-col.footer-dynamic-col .footer-slot-anchor-inner {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  align-items: flex-start;
  gap: 5px;
  width: 100%;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid #444444;
  padding-top: 20px;
  margin-top: 20px;
  color: #AAAAAA;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

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

  .header-top {
    min-height: 60px !important;
    height: 60px !important;
    padding-left: 15px; /* Adjust for hamburger menu */
    position: relative; /* For logo absolute positioning */
  }

  .header-container {
    width: 100%;
    max-width: none;
    padding: 0 15px;
    justify-content: space-between; /* To push hamburger left, and keep balance */
  }

  .hamburger-menu {
    display: block;
    position: relative; /* Ensure it stays in flow */
    z-index: 2;
  }

  .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 */
    height: 100%; /* Ensure vertical centering within header-top */
    z-index: 1;
    font-size: 24px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .logo img {
    max-height: 56px !important;
  }

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

  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    align-items: center;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    justify-content: center;
    background-color: var(--header-top-bg);
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    min-width: 0;
    max-width: calc(50% - 5px); /* 50% minus half of gap */
    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; /* Hidden by default */
    flex-direction: column;
    position: fixed;
    top: var(--header-offset);
    left: 0;
    width: 80%;
    max-width: 300px;
    height: calc(100% - var(--header-offset));
    background-color: #333333; /* Dark background for mobile menu */
    z-index: 1000;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 2px 0 5px rgba(0,0,0,0.3);
  }

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

  .nav-container {
    width: 100%;
    max-width: none;
    padding: 20px 15px;
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }

  .nav-link {
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    font-size: 16px;
  }

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

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

  .footer-top-grid {
    grid-template-columns: 1fr; /* Single column layout for mobile */
    padding: 0 15px;
  }

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

  .footer-dynamic-row {
    padding: 0 15px;
  }

  .footer-bottom {
    padding-left: 15px;
    padding-right: 15px;
  }

  /* 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;
  }
}

/* Ensure body padding-top is only here */
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;
  }
}