:root { --header-offset: 122px; }
body { padding-top: var(--header-offset); }
@media (max-width: 768px) { :root { --header-offset: 110px; } }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; min-height: auto; box-shadow: 0 4px 20px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2); border-bottom: 2px solid #2E7A4E; }
.header-top { background-color: #0A4B2C; width: 100%; border-bottom: 1px solid #1E3A2A; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding-left: 24px; padding-right: 24px; min-height: 68px; }
.logo { font-size: 32px; font-weight: 900; color: #F2FFF6; text-decoration: none; letter-spacing: -0.5px; text-transform: uppercase; flex-shrink: 0; line-height: 1.2; display: block; text-shadow: 0 0 15px rgba(87,227,141,0.3); }
.logo:hover { color: #57E38D; }
.desktop-nav-buttons { display: flex; gap: 10px; align-items: center; flex-shrink: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 28px; border-radius: 8px; font-size: 14px; font-weight: 700; text-decoration: none; transition: all 0.3s ease; border: none; cursor: pointer; min-height: 40px; box-shadow: 0 4px 15px rgba(17,168,78,0.3); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(87,227,141,0.4); }
.btn-register { background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%); color: #F2FFF6; border: 1px solid #57E38D; }
.btn-login { background: linear-gradient(180deg, #F2C14E 0%, #D4A032 100%); color: #08160F; border: 1px solid #F2C14E; }
.main-nav { background-color: #11271B; width: 100%; display: flex; border-bottom: 1px solid #2E7A4E; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 6px 24px; gap: 4px; width: 100%; }
.nav-link { color: #F2FFF6; text-decoration: none; font-size: 15px; font-weight: 600; padding: 10px 18px; border-radius: 6px; transition: all 0.3s ease; white-space: nowrap; line-height: 1.4; }
.nav-link:hover, .nav-link.active { background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%); color: #08160F; box-shadow: 0 0 12px rgba(87,227,141,0.3); }
.mobile-nav-buttons { display: none; }
.hamburger-menu { display: none; }
.mobile-menu-overlay { display: none; }
.site-footer { background-color: #08160F; width: 100%; border-top: 3px solid #2E7A4E; margin-top: 60px; }
.footer-container { max-width: 1200px; margin: 0 auto; padding: 60px 24px 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand .footer-logo { color: #F2FFF6; font-size: 28px; font-weight: 900; text-decoration: none; text-transform: uppercase; display: inline-block; margin-bottom: 16px; }
.footer-brand p { color: #A7D9B8; font-size: 14px; line-height: 1.8; margin: 0; max-width: 360px; }
.footer-col h4 { color: #F2C14E; font-size: 16px; font-weight: 700; margin: 0 0 20px; position: relative; padding-bottom: 10px; text-transform: uppercase; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 40px; height: 2px; background-color: #57E38D; }
.footer-nav { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a { color: #A7D9B8; text-decoration: none; font-size: 14px; transition: all 0.3s ease; line-height: 1.6; }
.footer-nav a:hover { color: #57E38D; padding-left: 5px; }
.footer-bottom { border-top: 1px solid #1E3A2A; padding-top: 20px; text-align: center; }
.footer-bottom p { color: #A7D9B8; font-size: 14px; margin: 0 0 8px; }
.footer-bottom p:last-child { margin-bottom: 0; }
.footer-18plus { color: #F2C14E; font-weight: 600; }
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  .header-container { width: 100%; max-width: none; padding-left: 15px; padding-right: 15px; min-height: 60px; justify-content: space-between; }
  .logo { font-size: 24px; }
  .desktop-nav-buttons { display: none; }
  .main-nav { display: none; flex-direction: column; position: fixed; top: 0; left: 0; width: 100%; height: 100vh; background-color: #11271B; z-index: 998; transform: translateX(-100%); transition: transform 0.3s ease; padding-top: 130px; overflow-y: auto; }
  .main-nav.active { display: flex; transform: translateX(0); }
  .main-nav .nav-link { color: #F2FFF6; font-size: 16px; padding: 15px 24px; width: 100%; text-align: center; border-bottom: 1px solid #1E3A2A; border-radius: 0; }
  .main-nav .nav-link:hover, .main-nav .nav-link.active { background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%); color: #08160F; }
  .nav-container { width: 100%; max-width: none; padding: 0; flex-direction: column; gap: 0; }
  .mobile-nav-buttons { display: block; background-color: #0A4B2C; border-top: 1px solid #2E7A4E; padding: 8px 15px; }
  .mobile-nav-buttons-container { width: 100%; max-width: none; display: flex; justify-content: center; gap: 10px; }
  .mobile-nav-buttons .btn { flex: 1; max-width: 160px; font-size: 13px; padding: 10px 16px; }
  .hamburger-menu { display: flex; flex-direction: column; justify-content: center; gap: 6px; width: 36px; height: 36px; cursor: pointer; z-index: 1001; background: transparent; border: none; padding: 0; }
  .hamburger-menu span { display: block; width: 100%; height: 3px; background-color: #57E38D; border-radius: 3px; transition: all 0.3s ease; }
  .hamburger-menu.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); background-color: #F2C14E; }
  .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .hamburger-menu.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); background-color: #F2C14E; }
  .mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(8,22,15,0.8); z-index: 997; }
  .mobile-menu-overlay.active { display: block; }
  .site-header { width: 100%; }
  .site-footer { width: 100%; }
  .footer-container { width: 100%; max-width: none; padding: 40px 15px 20px; }
  .footer-grid { width: 100%; grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom p { font-size: 13px; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }
  body { overflow-x: hidden; }
  .page-content, .page-index__hero-section, .page-index__video-section, .page-index__title-section { padding-top: 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;
  }
}
/* 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;
}