:root {
  --header-offset: 166px;
  --primary: #113B7A;
  --secondary: #1D5FD1;
  --card-bg: #10233F;
  --text-main: #F3F8FF;
  --text-secondary: #AFC4E8;
  --border: #244D84;
  --glow: #4FA8FF;
  --gold: #F2C14E;
  --divider: #1B3357;
  --deep-navy: #08162B;
}
body { padding-top: var(--header-offset); margin: 0; }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; box-shadow: 0 4px 20px rgba(0,0,0,0.3); background: var(--deep-navy); }
.header-top { background: var(--deep-navy); width: 100%; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 10px 30px; min-height: 68px; box-sizing: border-box; }
.logo { font-size: 28px; font-weight: 800; color: var(--text-main); text-decoration: none; letter-spacing: 1px; text-transform: uppercase; }
.logo:hover { color: var(--gold); }
.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 8px; font-size: 14px; font-weight: 600; text-decoration: none; transition: all 0.3s ease; }
.btn-primary { background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); color: #fff; }
.btn-secondary { background: linear-gradient(180deg, #F2C14E 0%, #D19A2A 100%); color: #08162B; }
.btn-primary:hover, .btn-secondary:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,0,0,0.3); }
.main-nav { background: var(--primary); width: 100%; display: flex; justify-content: center; min-height: 52px; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 6px; padding: 0 20px; width: 100%; box-sizing: border-box; }
.nav-link { color: var(--text-main); text-decoration: none; font-size: 14px; font-weight: 500; padding: 16px 12px; display: inline-block; transition: background-color 0.3s, color 0.3s; white-space: nowrap; }
.nav-link:hover { background: rgba(255,255,255,0.1); color: var(--gold); }
.nav-link.active { background: rgba(255,255,255,0.15); color: var(--gold); }
.site-footer { background: var(--deep-navy); color: var(--text-secondary); padding-top: 50px; margin-top: 0; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 40px; padding: 0 30px 40px; box-sizing: border-box; }
.footer-logo { font-size: 24px; font-weight: 800; color: var(--text-main); text-decoration: none; text-transform: uppercase; display: block; margin-bottom: 15px; }
.footer-desc { font-size: 14px; line-height: 1.6; color: var(--text-secondary); margin: 0; }
.footer-title { font-size: 16px; color: var(--text-main); margin: 0 0 15px; font-weight: 700; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 10px; }
.footer-nav a { color: var(--text-secondary); text-decoration: none; font-size: 14px; transition: color 0.3s; }
.footer-nav a:hover { color: var(--gold); }
.footer-bottom { border-top: 1px solid var(--divider); padding: 18px 20px; text-align: center; }
.copyright { font-size: 13px; color: var(--text-secondary); margin: 0; }
.hamburger-menu, .mobile-menu-overlay, .mobile-nav-buttons { display: none; }
@media (max-width: 768px) {
  :root { --header-offset: 146px; }
  .header-container { width: 100%; max-width: none; padding: 8px 10px; min-height: 60px; }
  .nav-container { width: 100%; max-width: none; padding: 0 10px; }
  .site-header { flex-wrap: wrap; }
  .header-top { order: 1; width: 100%; }
  .main-nav { display: none; flex-direction: column; position: fixed; top: 0; left: 0; width: 280px; height: 100vh; background: var(--deep-navy); z-index: 1100; transform: translateX(-100%); transition: transform 0.3s ease; overflow-y: auto; padding-top: 0; box-shadow: 4px 0 20px rgba(0,0,0,0.4); }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { flex-direction: column; align-items: flex-start; gap: 0; padding: 30px 10px; }
  .nav-link { width: 100%; padding: 14px 15px; border-bottom: 1px solid var(--divider); font-size: 15px; }
  .hamburger-menu { display: flex; flex-direction: column; justify-content: center; align-items: center; width: 44px; height: 44px; background: transparent; border: none; cursor: pointer; padding: 0; position: absolute; left: 10px; top: 8px; z-index: 1200; }
  .hamburger-menu .bar { display: block; width: 24px; height: 2px; background: var(--text-main); margin: 3px 0; transition: transform 0.3s ease, opacity 0.3s ease; }
  .hamburger-menu.active .bar:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); background: var(--gold); }
  .hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
  .hamburger-menu.active .bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); background: var(--gold); }
  .mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 1050; }
  .mobile-menu-overlay.active { display: block; }
  .mobile-nav-buttons { display: flex; justify-content: center; align-items: center; gap: 10px; padding: 8px 10px; background: var(--deep-navy); order: 2; width: 100%; min-height: 48px; box-sizing: border-box; }
  .mobile-nav-buttons .btn { flex: 1; text-align: center; font-size: 13px; padding: 10px 12px; }
  .desktop-nav-buttons { display: none; }
  .logo { font-size: 20px; text-align: center; width: calc(100% - 88px); margin-left: 44px; }
  .footer-container { grid-template-columns: 1fr; padding: 0 20px 30px; gap: 30px; }
  .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;
}