:root { --header-offset: 122px; --primary: #11A84E; --primary-light: #22C768; --bg-dark: #08160F; --card-bg: #11271B; --text-main: #F2FFF6; --text-secondary: #A7D9B8; --border-color: #2E7A4E; --glow: #57E38D; --gold: #F2C14E; --divider: #1E3A2A; --deep-green: #0A4B2C; }
body { margin: 0; padding: 0; padding-top: var(--header-offset); background-color: var(--bg-dark); font-family: 'Segoe UI', Roboto, Arial, sans-serif; color: var(--text-main); }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: var(--bg-dark); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7), 0 0 0 1px var(--border-color); }
.header-top { background: var(--deep-green); border-bottom: 1px solid var(--border-color); min-height: 68px; display: flex; align-items: center; }
.header-container { max-width: 1200px; margin: 0 auto; width: 100%; padding-left: 24px; padding-right: 24px; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 28px; font-weight: 900; color: var(--text-main); text-decoration: none; display: inline-block; line-height: 1.2; font-style: italic; letter-spacing: -0.5px;  }
.logo:hover { color: var(--glow); }
.desktop-nav-buttons { display: flex; align-items: center; gap: 10px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; font-weight: 700; font-size: 14px; text-decoration: none; text-align: center; transition: transform 0.3s ease, box-shadow 0.3s ease; min-width: 100px; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(87, 227, 141, 0.3); }
.btn-register { background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%); color: #06110A; border: 1px solid #57E38D; box-shadow: 0 0 12px rgba(87, 227, 141, 0.2); }
.btn-login { background: linear-gradient(180deg, var(--gold) 0%, #D9A63E 100%); color: #1A1200; border: 1px solid var(--gold); }
.btn-download { background: transparent; color: var(--text-main); border: 1px solid var(--border-color); }
.btn-download:hover { border-color: var(--primary-light); background-color: rgba(17, 168, 78, 0.15); color: var(--text-main); }
.main-nav { width: 100%; display: flex; background-color: #11271B; min-height: 52px; align-items: center; border-bottom: 1px solid var(--border-color); }
.nav-container { max-width: 1200px; margin: 0 auto; width: 100%; padding-left: 16px; padding-right: 16px; display: flex; justify-content: center; align-items: center; gap: 4px; }
.nav-link { color: var(--text-main); text-decoration: none; padding: 10px 14px; font-size: 15px; font-weight: 600; display: inline-block; border-radius: 6px; transition: background-color 0.3s ease, color 0.3s ease; letter-spacing: 0.2px; }
.nav-link:hover, .nav-link.active { color: var(--glow); background-color: rgba(34, 199, 104, 0.12); text-shadow: 0 0 8px rgba(87, 227, 141, 0.4); }
.hamburger-menu { display: none; background: none; border: none; cursor: pointer; padding: 10px; flex-direction: column; gap: 6px; z-index: 1002; align-items: center; justify-content: center; }
.hamburger-line { width: 26px; height: 3px; background-color: var(--text-main); border-radius: 3px; transition: transform 0.3s ease, opacity 0.3s ease; }
.hamburger-menu.active .hamburger-line:nth-child(1) { transform: translateY(9px) rotate(45deg); background-color: var(--glow); }
.hamburger-menu.active .hamburger-line:nth-child(2) { opacity: 0; }
.hamburger-menu.active .hamburger-line:nth-child(3) { transform: translateY(-9px) rotate(-45deg); background-color: var(--glow); }
.mobile-menu-overlay { display: none; }
body.no-scroll { overflow: hidden; }
.mobile-nav-buttons { display: none; }
.site-footer { background-color: #08160F; border-top: 1px solid var(--divider); padding: 48px 0 0 0; margin-top: 40px; }
.footer-container { max-width: 1200px; margin: 0 auto; width: 100%; padding-left: 24px; padding-right: 24px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-logo { color: var(--text-main); text-decoration: none; font-size: 28px; font-weight: 900; font-style: italic; }
.footer-description { color: var(--text-secondary); font-size: 14px; line-height: 1.7; margin-top: 16px; }
.footer-age-badge { display: inline-block; border: 1px solid var(--border-color); color: var(--glow); border-radius: 4px; padding: 4px 12px; font-weight: 700; margin-top: 16px; font-size: 14px; }
.footer-heading { color: var(--text-main); font-size: 17px; font-weight: 700; margin-top: 0; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 1px solid var(--divider); position: relative; }
.footer-heading::after { content: ''; position: absolute; bottom: -1px; left: 0; width: 40px; height: 2px; background-color: var(--primary-light); }
.footer-menu-list { list-style: none; padding: 0; margin: 0; }
.footer-menu-list li { margin-bottom: 8px; }
.footer-link { color: #A7D9B8; text-decoration: none; font-size: 14px; transition: color 0.3s, padding-left 0.3s; }
.footer-link:hover { color: var(--glow); padding-left: 6px; }
.footer-bottom { background-color: #08160F; border-top: 1px solid #1E3A2A; padding: 18px 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding-top: 0; padding-bottom: 0; }
.copyright-text { color: var(--text-secondary); font-size: 14px; }
.footer-disclaimer { color: var(--text-secondary); font-size: 14px; }
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  .header-top { min-height: 60px; }
  .header-container { width: 100%; max-width: none; padding-left: 12px; padding-right: 12px; }
  .logo { margin-right: auto; }
  .desktop-nav-buttons { display: none; }
  .hamburger-menu { display: flex; order: 1; }
  .logo { order: 2; margin-right: auto; flex: 1; text-align: center; font-size: 23px; }
  .hamburger-menu { margin-left: 0; }
  .btn { padding: 8px 12px; font-size: 12px; min-width: unset; }
  .mobile-nav-buttons { display: flex; justify-content: center; align-items: center; gap: 8px; padding-left: 8px; padding-right: 8px; width: 100%; }
  .main-nav { display: none; flex-direction: column; position: fixed; top: 0; left: 0; width: 280px; height: 100vh; background-color: #11271B; z-index: 1002; padding-top: 20px; overflow-y: auto; transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: 4px 0 25px rgba(0, 0, 0, 0.5); }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { flex-direction: column; width: 100%; gap: 8px; padding-left: 12px; padding-right: 12px; }
  .nav-link { font-size: 15px; padding: 12px 12px; text-align: left; color: var(--text-main); }
  .mobile-menu-overlay { display: block; position: fixed; top: 0; right: 0; width: calc(100% - 280px); height: 100vh; background-color: rgba(0, 0, 0, 0.3); z-index: 1001; opacity: 0; visibility: hidden; transition: opacity 0.3s ease; }
  .mobile-menu-overlay.active { opacity: 1; visibility: visible; }
  .footer-container { grid-template-columns: 1fr; gap: 32px; padding-left: 16px; padding-right: 16px; text-align: center; }
  .footer-heading::after { left: 50%; transform: translateX(-50%); }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .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;
}