.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: #FFFFFF; box-shadow: 0 2px 8px rgba(0,0,0,0.15); font-family: 'Arial', sans-serif; }
.site-header .header-top { background-color: #26A9E0; width: 100%; }
.site-header .header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; }
.site-header .logo { display: inline-block; font-size: 28px; font-weight: bold; color: #FFFFFF; text-decoration: none; text-transform: uppercase; letter-spacing: 1px; order: -1; }
.site-header .logo:hover { color: #000000; }
.site-header .desktop-nav-buttons { display: flex; gap: 10px; margin-left: auto; }
.site-header .btn { display: inline-block; padding: 10px 22px; border-radius: 6px; font-size: 14px; font-weight: bold; text-decoration: none; color: #FFFFFF; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.site-header .btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
.site-header .btn-login { background-color: #EA7C07; }
.site-header .btn-register { background-color: #28a745; }
.site-header .mobile-nav-buttons { display: none; }
.site-header .main-nav { background-color: #FFFFFF; width: 100%; display: flex; border-top: 1px solid #eee; }
.site-header .nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 4px; padding: 8px 20px; flex-wrap: wrap; }
.site-header .nav-container a { padding: 8px 12px; font-size: 14px; color: #333333; text-decoration: none; border-radius: 4px; transition: background-color 0.2s ease, color 0.2s ease; }
.site-header .nav-container a:hover { background-color: #26A9E0; color: #FFFFFF; }
.site-header .hamburger-menu { display: none; }
.site-header .mobile-menu-overlay { display: none; }
:root { --header-offset: 122px; }
body { padding-top: var(--header-offset); margin: 0; }
.site-footer { background-color: #1a1a2e; color: #FFFFFF; font-family: 'Arial', sans-serif; padding-top: 50px; margin-top: 60px; }
.site-footer .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding: 0 20px 40px; }
.site-footer .footer-logo { display: block; font-size: 24px; font-weight: bold; color: #26A9E0; text-decoration: none; margin-bottom: 15px; }
.site-footer .footer-logo:hover { color: #FFFFFF; }
.site-footer p { font-size: 14px; line-height: 1.6; color: #ccc; margin: 0; }
.site-footer h3 { color: #FFFFFF; font-size: 16px; margin-bottom: 20px; text-transform: uppercase; }
.site-footer .footer-nav { list-style: none; padding: 0; margin: 0; }
.site-footer .footer-nav li { margin-bottom: 10px; }
.site-footer .footer-nav a { color: #ccc; text-decoration: none; font-size: 14px; transition: color 0.2s ease; }
.site-footer .footer-nav a:hover { color: #26A9E0; }
.site-footer .footer-bottom { border-top: 1px solid #2a2a4e; padding: 20px; text-align: center; background-color: #141428; }
.site-footer .footer-bottom p { font-size: 13px; color: #999;
}
@media (max-width: 768px) {
  .site-header { min-height: 134px; }
  .site-header .header-top { min-height: 60px; }
  .site-header .header-container { width: 100%; max-width: none; padding: 10px 15px; position: relative; justify-content: center; }
  .site-header .logo { font-size: 24px; order: 0; margin: 0 auto; display: block; text-align: center; }
  .site-header .desktop-nav-buttons { display: none; }
  .site-header .mobile-nav-buttons { display: flex; justify-content: center; gap: 12px; padding: 6px 10px; background-color: #26A9E0; border-top: 1px solid rgba(255,255,255,0.3); position: relative; z-index: 990; }
  .site-header .btn { padding: 8px 20px; font-size: 13px; border-radius: 6px; }
  .site-header .main-nav { display: none; position: fixed; top: 0; left: 0; width: 80%; max-width: 320px; height: 100vh; background-color: #FFFFFF; flex-direction: column; justify-content: flex-start; align-items: flex-start; padding-top: 80px; z-index: 1002; transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: 2px 0 8px rgba(0,0,0,0.1); }
  .site-header .main-nav.active { display: block; transform: translateX(0); }
  .site-header .nav-container { width: 100%; max-width: none; flex-direction: column; align-items: center; gap: 0; padding: 20px 0; }
  .site-header .nav-container a { display: block; width: 100%; text-align: center; padding: 12px 10px; font-size: 16px; border-bottom: 1px solid #f0f0f0; color: #333333; }
  .site-header .nav-container a:hover { background-color: #26A9E0; color: #FFFFFF; }
  .site-header .hamburger-menu { display: flex; flex-direction: column; justify-content: center; align-items: center; width: 40px; height: 40px; position: absolute; top: 10px; left: 10px; cursor: pointer; z-index: 1002; background: transparent; border: none; padding: 0; }
  .site-header .hamburger-menu span { display: block; width: 25px; height: 3px; background-color: #FFFFFF; margin: 4px 0; transition: transform 0.3s ease, opacity 0.3s ease; border-radius: 2px; }
  .site-header .hamburger-menu.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-header .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .site-header .hamburger-menu.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-header .mobile-menu-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; background-color: rgba(0,0,0,0.5); z-index: 1001; display: none; }
  .site-header .mobile-menu-overlay.active { display: block; }
  body.no-scroll { overflow: hidden; }
  .site-footer .footer-container { grid-template-columns: 1fr 1fr; gap: 30px; }
  :root { --header-offset: 110px; }
  .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;
}