.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: #FFFFFF; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15); min-height: auto; }
.header-top { background-color: #1A2B3C; width: 100%; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding-left: 20px; padding-right: 20px; min-height: 68px; }
.logo { display: inline-block; font-size: 28px; font-weight: 800; color: #FFFFFF; text-decoration: none; letter-spacing: 1px; }
.logo:hover { color: #26A9E0; }
.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.main-nav { background-color: #FFFFFF; width: 100%; display: flex; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 10px 20px; gap: 24px; }
.nav-link { color: #333333; text-decoration: none; font-weight: 500; padding: 8px 4px; transition: color 0.3s ease; font-size: 16px; white-space: nowrap; }
.nav-link:hover { color: #26A9E0; }
.btn { display: inline-block; text-decoration: none; padding: 10px 20px; border-radius: 6px; font-weight: 600; transition: transform 0.2s ease, box-shadow 0.3s ease; text-align: center; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); }
.btn-login { background-color: #EA7C07; color: #FFFFFF; }
.btn-register { background-color: #26A9E0; color: #FFFFFF; }
.hamburger-menu { display: none; }
.mobile-menu-overlay { display: none; }
.mobile-nav-buttons { display: none; }
.site-footer { background-color: #1A2B3C; color: #FFFFFF; padding: 40px 0 0 0; margin-top: 40px; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding: 0 20px 40px 20px; }
.footer-logo { display: inline-block; font-size: 24px; font-weight: 800; color: #26A9E0; text-decoration: none; margin-bottom: 16px; }
.footer-logo:hover { color: #FFFFFF; }
.footer-desc { color: #B0BEC5; font-size: 14px; line-height: 1.6; }
.footer-title { color: #FFFFFF; font-size: 18px; font-weight: 600; margin-bottom: 16px; }
.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { color: #B0BEC5; text-decoration: none; font-size: 14px; transition: color 0.3s ease; }
.footer-nav a:hover { color: #26A9E0; }
.footer-contact p { color: #B0BEC5; font-size: 14px; margin-bottom: 10px; }
.footer-bottom { background-color: #141F2E; padding: 20px; text-align: center; color: #B0BEC5; font-size: 14px; }
.footer-bottom p { margin: 0; }
:root { --header-offset: 122px; }
body { padding-top: var(--header-offset); }
@media (max-width: 768px) {
  .header-container { width: 100%; max-width: none; padding-left: 15px; padding-right: 15px; min-height: 60px; position: relative; }
  .logo { font-size: 24px; position: absolute; left: 50%; transform: translateX(-50%); }
  .desktop-nav-buttons { display: none; }
  .main-nav { display: none; position: fixed; top: 0; left: 0; width: 280px; height: 100%; background-color: #FFFFFF; flex-direction: column; padding-top: 60px; box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2); transform: translateX(-100%); transition: transform 0.3s ease; z-index: 1002; }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { flex-direction: column; align-items: flex-start; padding-left: 24px; gap: 0; width: 100%; max-width: none; }
  .nav-link { display: block; width: 100%; padding: 14px 0; font-size: 16px; border-bottom: 1px solid #eeeeee; }
  .hamburger-menu { display: block; position: absolute; left: 15px; top: 50%; transform: translateY(-50%); background: none; border: none; cursor: pointer; padding: 8px; z-index: 1003; }
  .hamburger-menu span { display: block; width: 24px; height: 2px; background-color: #FFFFFF; margin: 5px 0; transition: all 0.3s ease; }
  .hamburger-menu.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); background-color: #26A9E0; }
  .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .hamburger-menu.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); background-color: #26A9E0; }
  .mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.5); z-index: 999; }
  .mobile-menu-overlay.active { display: block; }
  .mobile-nav-buttons { display: flex; justify-content: center; gap: 12px; padding: 10px 15px; background-color: #FFFFFF; border-bottom: 1px solid #eeeeee; }
  .mobile-nav-buttons .btn { flex: 1; padding: 10px 0; font-size: 14px; max-width: 150px; }
  :root { --header-offset: 110px; }
  .site-footer { padding-top: 30px; }
  .footer-container { grid-template-columns: 1fr; gap: 20px; padding-bottom: 30px; }
  .footer-info, .footer-links, .footer-contact { text-align: center; }
  .footer-nav { align-items: center; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }
  body { overflow-x: 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;
  }
}
/* 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;
}