:root { --header-offset: 122px; --primary: #017439; --primary-dark: #015529; --primary-light: #e8f5ee; --white: #FFFFFF; --accent: #C30808; --accent-font: #FFFF00; --text-dark: #222; --text-light: #666; }
body { margin: 0; padding-top: var(--header-offset); background: var(--white); font-family: Arial, Helvetica, sans-serif; }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; box-shadow: 0 2px 12px rgba(0,0,0,0.15); }
.hamburger-menu, .mobile-menu-overlay { display: none; }
.header-top { background: var(--primary-dark); }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 12px 24px; gap: 16px; }
.logo { display: inline-block; color: var(--white); font-size: 1.6rem; font-weight: 800; text-decoration: none; line-height: 1.2; letter-spacing: 0.5px; }
.logo:hover { color: var(--accent-font); }
.desktop-nav-buttons { display: flex; gap: 10px; align-items: center; }
.btn { display: inline-block; padding: 8px 20px; border-radius: 6px; text-decoration: none; font-weight: 700; font-size: 0.9rem; border: none; cursor: pointer; text-align: center; min-width: 80px; transition: opacity 0.2s; }
.btn-register { background: #C30808; color: var(--accent-font); }
.btn-login { background: #C30808; color: var(--accent-font); }
.btn:hover { opacity: 0.85; }
.main-nav { background: var(--white); border-bottom: 2px solid var(--primary); display: flex; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 4px; padding: 6px 24px; flex-wrap: wrap; }
.nav-link { display: inline-block; padding: 8px 12px; color: var(--text-dark); text-decoration: none; font-weight: 600; font-size: 0.9rem; border-radius: 4px; transition: background 0.2s, color 0.2s; white-space: nowrap; }
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.mobile-nav-buttons { display: none; background: var(--primary-dark); padding: 8px 12px; gap: 8px; justify-content: center; }
.site-footer { background: var(--primary-dark); color: var(--white); padding: 0; margin-top: 40px; }
.footer-container { max-width: 1200px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 30px; padding: 36px 24px 24px; justify-content: space-between; }
.footer-col { flex: 1 1 200px; min-width: 180px; }
.footer-about .footer-logo { font-size: 1.4rem; font-weight: 800; color: var(--white); text-decoration: none; display: block; margin-bottom: 12px; }
.footer-col p { font-size: 0.85rem; line-height: 1.7; color: #d0e6dc; margin: 4px 0; }
.footer-col h4 { font-size: 1rem; margin-bottom: 10px; color: var(--white); border-bottom: 2px solid var(--accent); display: inline-block; padding-bottom: 4px; }
.footer-nav { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a { color: #d0e6dc; text-decoration: none; font-size: 0.9rem; }
.footer-nav a:hover { color: var(--accent-font); text-decoration: underline; }
.footer-action .btn { display: block; margin: 8px 0; width: 100%; }
.footer-bottom { background: var(--primary-dark); border-top: 1px solid rgba(255,255,255,0.15); text-align: center; padding: 14px 20px; font-size: 0.85rem; }
.footer-bottom p { margin: 4px 0; color: #c0d8cf; }
.footer-bottom span { color: var(--white); font-weight: 700; }
@media (max-width: 768px) {
:root { --header-offset: 110px; }
body { padding-top: var(--header-offset); }
.header-top { position: relative; }
.header-container { width: 100%; max-width: none; padding: 12px 16px; }
.logo { font-size: 1.2rem; }
.desktop-nav-buttons { display: none; }
.main-nav { display: none; position: fixed; top: 0; left: 0; width: 280px; height: 100%; z-index: 1101; background: var(--white); flex-direction: column; justify-content: flex-start; padding: 20px 0 0; transform: translateX(-100%); transition: transform 0.3s ease-in-out; box-shadow: 2px 0 15px rgba(0,0,0,0.2); overflow-y: auto; border-bottom: none; }
.main-nav.active { display: block; transform: translateX(0); }
.nav-container { width: 100%; max-width: none; flex-direction: column; align-items: flex-start; padding: 0; gap: 0; justify-content: flex-start; }
.nav-link { display: block; padding: 14px 20px; width: 100%; border-bottom: 1px solid #eee; font-size: 1rem; }
.nav-link:hover { background: var(--primary-light); }
.mobile-nav-buttons { display: flex; position: relative; z-index: 1000; }
.mobile-nav-buttons .btn { flex: 1; margin: 0; padding: 10px 12px; font-size: 0.85rem; min-width: 0; }
.hamburger-menu { display: flex; flex-direction: column; justify-content: center; align-items: center; width: 44px; height: 44px; cursor: pointer; background: transparent; border: none; z-index: 1102; }
.hamburger-menu span { display: block; width: 22px; height: 2px; background: var(--white); margin: 4px 0; transition: transform 0.3s ease; transform-origin: center; }
.hamburger-menu.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger-menu.active span:nth-child(2) { opacity: 0; }
.hamburger-menu.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1100; }
.mobile-menu-overlay.active { display: block; }
body.no-scroll { overflow: hidden; }
.footer-container { padding-bottom: 16px; justify-content: center; flex-direction: column; text-align: center; }
.footer-col { flex: 1 1 auto; min-width: auto; }
.footer-about .footer-logo { margin: 0 auto 8px; }
.footer-action .btn { width: 200px; margin: 8px auto; }
.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;
}