:root { --header-offset: 166px; --primary-color: #017439; --secondary-color: #FFFFFF; --btn-login-bg: #C30808; --btn-register-bg: #C30808; --btn-font-color: #FFFF00; }
body { padding-top: var(--header-offset); margin: 0; font-family: Arial, Helvetica, sans-serif; background-color: var(--secondary-color); }
.site-header { position: fixed; top: 0; left: 0; width: 100%; background-color: var(--secondary-color); z-index: 1000; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15); }
.header-top { background-color: var(--primary-color); width: 100%; min-height: 68px; display: flex; align-items: center; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; width: 100%; padding-left: 24px; padding-right: 24px; box-sizing: border-box; }
.logo { display: inline-block; font-size: 32px; font-weight: bold; color: var(--secondary-color); text-decoration: none; line-height: 1.2; }
.desktop-nav-buttons { display: flex; align-items: center; gap: 12px; }
.btn-login, .btn-register { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border-radius: 6px; font-size: 15px; font-weight: bold; text-decoration: none; min-height: 36px; border: none; cursor: pointer; transition: opacity 0.3s ease; color: var(--btn-font-color); }
.btn-login { background-color: var(--btn-login-bg); }
.btn-register { background-color: var(--btn-register-bg); }
.btn-login:hover, .btn-register:hover { opacity: 0.9; }
.main-nav { background-color: #333333; width: 100%; min-height: 52px; display: flex; align-items: center; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 0; padding-left: 20px; padding-right: 20px; width: 100%; box-sizing: border-box; flex-wrap: wrap; }
.nav-container a { color: var(--secondary-color); text-decoration: none; padding: 14px 16px; font-size: 15px; display: inline-block; transition: background-color 0.3s ease; line-height: 1.4; }
.nav-container a:hover { background-color: var(--primary-color); }
.mobile-nav-buttons { display: none; }
.hamburger-menu { display: none; }
.mobile-menu-overlay { display: none; }
.site-footer { background-color: #222222; color: #f0f0f0; padding: 40px 20px 20px; font-size: 15px; line-height: 1.6; }
.footer-container { max-width: 1200px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 40px; }
.footer-column { flex: 1 1 200px; min-width: 200px; }
.footer-logo { display: inline-block; font-size: 24px; font-weight: bold; color: var(--secondary-color); text-decoration: none; margin-bottom: 15px; }
.footer-description { color: #bbbbbb; margin-bottom: 10px; font-size: 14px; }
.footer-copyright { color: #bbbbbb; font-size: 14px; }
.footer-heading { font-size: 16px; color: var(--secondary-color); margin-bottom: 15px; font-weight: 600; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 8px; }
.footer-nav a { color: #aaaaaa; text-decoration: none; transition: color 0.3s ease; font-size: 14px; }
.footer-nav a:hover { color: var(--primary-color); }
@media (max-width: 768px) {
  :root { --header-offset: 146px; }
  .header-top { min-height: 60px; }
  .header-container { width: 100%; max-width: none; padding-left: 15px; padding-right: 15px; justify-content: space-between; }
  .logo { font-size: 28px; }
  .desktop-nav-buttons { display: none; }
  .main-nav { display: flex; flex-direction: column; position: fixed; top: 0; left: 0; transform: translateX(-100%); width: 280px; max-width: 85vw; height: 100vh; overflow-y: auto; background-color: #222222; z-index: 1002; transition: transform 0.3s ease; align-items: flex-start; }
  .main-nav.active { display: block; transform: translateX(0); }
  .main-nav .nav-container { flex-direction: column; align-items: flex-start; width: 100%; max-width: none; padding: 0; }
  .main-nav .nav-container a { display: block; width: 100%; padding: 14px 20px; border-bottom: 1px solid #444444; box-sizing: border-box; }
  .mobile-nav-buttons { display: flex; justify-content: space-around; width: 100%; background-color: #e9e9e9; padding: 8px 10px; box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); gap: 10px; }
  .mobile-nav-buttons .btn-login, .mobile-nav-buttons .btn-register { flex: 1; max-width: 120px; padding: 8px 12px; font-size: 14px; text-align: center; }
  .hamburger-menu { display: flex; flex-direction: column; justify-content: center; align-items: center; width: 40px; height: 40px; background: transparent; border: none; cursor: pointer; z-index: 1003; gap: 5px; padding: 0; position: absolute; left: 10px; top: 10px; }
  .hamburger-menu span { display: block; background-color: var(--secondary-color); width: 22px; height: 2.5px; border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; }
  .hamburger-menu.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .hamburger-menu.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .mobile-menu-overlay { display: block; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.5); opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; z-index: 1001; }
  .mobile-menu-overlay.active { opacity: 1; visibility: visible; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }
  body { overflow-x: hidden; }
  .footer-container { gap: 20px; }
  .footer-column { flex: 1 1 100%; min-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;
}