html { scroll-behavior: smooth; }
body { font-family: 'Arial', sans-serif; margin: 0; padding-top: var(--header-offset); background-color: #F5F7FA; color: #333333; overflow-x: hidden; }
:root { --header-offset: 122px; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  background-color: #FFFFFF;
}

.header-top {
  box-sizing: border-box; height: 68px; min-height: 68px;
  display: flex; align-items: center; overflow: hidden;
  background-color: #E53935; /* Main color */
  color: #FFFFFF;
}

.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 {
  font-size: 28px; font-weight: bold; color: #FFFFFF; text-decoration: none;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 250px;
}
.logo img { display: block; max-height: 60px; height: auto; width: auto; max-width: 280px; object-fit: contain; }

.hamburger-menu {
  display: none; /* Hidden on desktop */
  width: 30px; height: 24px; background: none; border: none; cursor: pointer;
  position: relative; padding: 0;
}
.hamburger-icon, .hamburger-icon::before, .hamburger-icon::after {
  content: ''; display: block; width: 100%; height: 3px; background-color: #FFFFFF;
  position: absolute; left: 0; transition: all 0.3s ease;
}
.hamburger-icon::before { top: -8px; }
.hamburger-icon::after { top: 8px; }
.hamburger-menu.active .hamburger-icon { background-color: transparent; }
.hamburger-menu.active .hamburger-icon::before { transform: rotate(45deg); top: 0; }
.hamburger-menu.active .hamburger-icon::after { transform: rotate(-45deg); top: 0; }

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

.mobile-nav-buttons {
  box-sizing: border-box; display: none; /* Hidden on desktop by default */
  min-height: 48px;
  background-color: #E53935; /* Same as header-top for consistency */
}

.btn {
  display: inline-flex; justify-content: center; align-items: center;
  padding: 10px 20px; border-radius: 5px; text-decoration: none;
  font-weight: bold; color: #FFFFFF; cursor: pointer;
  background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
  border: none; white-space: nowrap; transition: background 0.3s ease;
}
.btn:hover { opacity: 0.9; }

.main-nav {
  box-sizing: border-box; height: 52px; min-height: 52px;
  display: flex; align-items: center; overflow: hidden;
  background-color: #FF5A4F; /* Auxiliary color, different from header-top */
  color: #FFFFFF;
}

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

.nav-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 25px;
}
.nav-list li a {
  color: #FFFFFF; text-decoration: none; font-weight: bold;
  font-size: 16px; padding: 5px 0; transition: opacity 0.3s ease;
  white-space: nowrap;
}
.nav-list li a:hover { opacity: 0.8; }

.overlay {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0,0,0,0.5); z-index: 999; cursor: pointer;
}

/* Footer Styles */
.site-footer {
  background-color: #333333; color: #E0E0E0; padding: 40px 0 20px;
  font-size: 14px; line-height: 1.6;
}
.footer-top-grid {
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px;
  margin-bottom: 30px;
}
.footer-col h3 {
  color: #FFFFFF; font-size: 18px; margin-bottom: 15px;
}
.footer-logo {
  font-size: 24px; font-weight: bold; color: #FFFFFF; text-decoration: none;
  display: block; margin-bottom: 15px;
}
.footer-description {
  margin-bottom: 15px;
}
.footer-nav {
  list-style: none; margin: 0; padding: 0;
}
.footer-nav li a {
  color: #E0E0E0; text-decoration: none; display: block; margin-bottom: 8px;
  transition: color 0.3s ease;
}
.footer-nav li a:hover { color: #FF5A4F; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto; padding: 20px 20px 0;
  text-align: center; border-top: 1px solid #444444;
  color: #999999;
}
.footer-bottom p { margin: 0; }
.footer-slot-anchor-inner, .footer-slot-anchor-container { min-height: 10px; }

/* Responsive Styles */
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { padding-top: var(--header-offset); overflow-x: hidden; }

  .header-top { height: 60px !important; min-height: 60px !important; background-color: #E53935; }
  .header-container {
    width: 100%; max-width: none; padding-left: 15px; padding-right: 15px;
    position: relative; justify-content: center;
  }
  .hamburger-menu { display: block; position: absolute; left: 15px; top: 50%; transform: translateY(-50%); z-index: 1001; }
  .logo {
    flex: 1 !important; display: flex !important; justify-content: center !important; align-items: center !important;
    font-size: 24px; max-width: calc(100% - 100px);
  }
  .logo img { max-height: 56px !important; }

  .desktop-nav-buttons { display: none !important; }
  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px; height: 48px;
    align-items: center; justify-content: center;
    width: 100%; max-width: 100%;
    box-sizing: border-box;
    padding-left: 15px; padding-right: 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    background-color: #E53935; /* Match header-top */
  }
  .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; /* Hidden by default, toggled by JS */
    position: fixed; top: var(--header-offset); left: 0; width: 80%; max-width: 300px; height: calc(100% - var(--header-offset));
    background-color: #222222; /* Darker background for mobile menu */
    flex-direction: column; justify-content: flex-start; align-items: flex-start;
    padding: 20px 0; box-sizing: border-box; overflow-y: auto;
    transform: translateX(-100%); transition: transform 0.3s ease;
    z-index: 1000;
  }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { width: 100%; max-width: none; padding: 0 15px; }
  .nav-list {
    flex-direction: column; width: 100%;
    gap: 0;
  }
  .nav-list li {
    width: 100%;
  }
  .nav-list li a {
    padding: 12px 15px; border-bottom: 1px solid #333333; display: block; font-size: 15px;
    color: #FFFFFF;
  }
  .nav-list li:last-child a { border-bottom: none; }

  .site-footer { padding: 30px 0 15px; }
  .footer-top-grid { grid-template-columns: 1fr; padding: 0 15px; gap: 20px; }
  .footer-bottom { padding: 15px 15px 0; }

  .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;
}