:root { --header-offset: 122px; }
body { margin: 0; padding-top: var(--header-offset); font-family: Arial, sans-serif; line-height: 1.6; color: #333333; overflow-x: hidden; }
.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); }
.header-top { box-sizing: border-box; min-height: 68px; height: 68px; display: flex; align-items: center; overflow: hidden; background-color: #333333; color: #FFFFFF; width: 100%; position: relative; }
.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: 24px; font-weight: bold; color: #FFFFFF; text-decoration: none; display: flex; align-items: center; }
.logo img { display: block; max-height: 60px; height: auto; width: auto; max-width: 280px; object-fit: contain; }
.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.mobile-nav-buttons { box-sizing: border-box; display: none; min-height: 48px; background-color: #222222; padding: 0 20px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 5px; text-decoration: none; font-weight: bold; transition: background-color 0.3s ease, transform 0.2s ease; white-space: nowrap; cursor: pointer; border: none; }
.btn-register { background-color: #26A9E0; color: #FFFFFF; }
.btn-register:hover { background-color: #1A7FB5; transform: translateY(-1px); }
.btn-login { background-color: #EA7C07; color: #FFFFFF; }
.btn-login:hover { background-color: #D36C06; transform: translateY(-1px); }
.main-nav { box-sizing: border-box; min-height: 52px; height: 52px; display: flex; align-items: center; overflow: hidden; background-color: #26A9E0; width: 100%; }
.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; }
.nav-link { color: #FFFFFF; text-decoration: none; padding: 0 15px; transition: color 0.3s ease; font-size: 15px; white-space: nowrap; }
.nav-link:hover { color: #D0EFFF; }
.hamburger-menu { display: none; flex-direction: column; justify-content: space-around; width: 30px; height: 25px; cursor: pointer; padding: 0; background: transparent; border: none; position: absolute; left: 20px; z-index: 1001; }
.hamburger-menu span { display: block; height: 3px; width: 100%; background: #FFFFFF; border-radius: 3px; transition: all 0.3s ease; }
.hamburger-menu.active span:nth-child(1) { transform: translateY(11px) rotate(45deg); }
.hamburger-menu.active span:nth-child(2) { opacity: 0; }
.hamburger-menu.active span:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }
.overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); z-index: 999; }
.overlay.active { display: block; }

.site-footer { background-color: #333333; color: #CCCCCC; padding: 40px 0 20px; font-size: 14px; }
.footer-top-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.footer-col h3 { color: #FFFFFF; margin-bottom: 15px; font-size: 16px; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li a { color: #CCCCCC; text-decoration: none; line-height: 1.8; transition: color 0.3s ease; }
.footer-nav li a:hover { color: #FFFFFF; }
.footer-logo { font-size: 22px; font-weight: bold; color: #FFFFFF; text-decoration: none; margin-bottom: 15px; display: block; }
.footer-description { font-size: 14px; line-height: 1.6; word-wrap: break-word; overflow-wrap: break-word; }
.footer-mid-section, .footer-mid-grid-container { min-height: 10px; margin-top: 10px; }
.footer-bottom { text-align: center; padding-top: 20px; margin-top: 20px; border-top: 1px solid #444444; font-size: 13px; }
.footer-bottom p { margin: 0; }
.footer-slot-anchor-inner { min-height: 1px; }

@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { overflow-x: hidden; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }

  .header-top { min-height: 60px; height: 60px; padding: 0 15px; justify-content: space-between; }
  .header-top .header-container { flex: 1; justify-content: center; padding: 0; max-width: none; }
  .logo { flex: 1 !important; display: flex !important; justify-content: center !important; align-items: center !important; }
  .logo img { max-height: 56px !important; }
  .desktop-nav-buttons { display: none !important; }
  .mobile-nav-buttons { display: flex !important; min-height: 48px; align-items: center; justify-content: center; width: 100%; max-width: 100%; box-sizing: border-box; padding: 0 15px; overflow: hidden; gap: 10px; flex-wrap: nowrap; background-color: #222222; }
  .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; }
  .hamburger-menu { display: flex; position: static; order: -1; margin-right: 15px; /* Push hamburger to left */ }
  .main-nav { display: none; flex-direction: column; position: fixed; top: var(--header-offset); left: 0; width: 250px; height: calc(100vh - var(--header-offset)); background-color: #1A7FB5; padding: 20px 0; box-sizing: border-box; transform: translateX(-100%); transition: transform 0.3s ease; z-index: 1001; overflow-y: auto; }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { flex-direction: column; align-items: flex-start; padding: 0 20px; max-width: none; width: 100%; }
  .nav-link { width: 100%; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.1); text-align: left; }
  .nav-link:last-child { border-bottom: none; }

  .footer-top-grid { grid-template-columns: 1fr; padding: 0 15px; }
  .footer-col { margin-bottom: 20px; }
  .footer-col:last-child { margin-bottom: 0; }
  .footer-mid-grid-container { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
}
/* 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;
  }
}