html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Arial', sans-serif; background-color: #08162B; color: #F3F8FF; padding-top: var(--header-offset); overflow-x: hidden; }
:root { --header-offset: 122px; --main-color: #113B7A; --aux-color: #1D5FD1; --card-bg: #10233F; --text-main: #F3F8FF; --text-secondary: #AFC4E8; --border-color: #244D84; --btn-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%); --glow-color: #4FA8FF; --gold-color: #F2C14E; --divider-color: #1B3357; --deep-navy: #08162B; }

/* Site Header */
.site-header { position: fixed; top: 0; left: 0; right: 0; width: 100%; z-index: 1000; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3); background-color: var(--deep-navy); box-sizing: border-box; }
.header-top { box-sizing: border-box; min-height: 68px; height: 68px; display: flex; align-items: center; overflow: hidden; background-color: var(--deep-navy); width: 100%; }
.header-container { box-sizing: border-box; width: 100%; height: 100%; max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 30px; }
.logo { color: var(--gold-color); font-size: 28px; font-weight: bold; text-decoration: none; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 280px; }
.logo:hover { color: var(--aux-color); }

.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.mobile-nav-buttons { box-sizing: border-box; display: none; min-height: 48px; width: 100%; background-color: var(--main-color); padding: 0 30px; margin-bottom: 0; }

.main-nav { box-sizing: border-box; min-height: 52px; height: 52px; display: flex; align-items: center; overflow: hidden; background-color: var(--main-color); width: 100%; }
.nav-container { box-sizing: border-box; height: 100%; max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 0 20px; }
.nav-list { list-style: none; margin: 0; padding: 0; display: flex; gap: 25px; }
.nav-list li a { color: var(--text-main); text-decoration: none; font-size: 16px; font-weight: 500; padding: 5px 0; position: relative; transition: color 0.3s ease; white-space: nowrap; }
.nav-list li a::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background-color: var(--gold-color); transition: width 0.3s ease; }
.nav-list li a:hover { color: var(--gold-color); }
.nav-list li a:hover::after { width: 100%; }

/* Hamburger Menu */
.hamburger-menu { display: none; width: 30px; height: 22px; background: none; border: none; cursor: pointer; position: relative; z-index: 1002; padding: 0; }
.hamburger-menu span { display: block; width: 100%; height: 3px; background-color: var(--text-main); margin-bottom: 5px; transition: all 0.3s ease; border-radius: 2px; }
.hamburger-menu span:last-child { margin-bottom: 0; }
.hamburger-menu.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger-menu.active span:nth-child(2) { opacity: 0; }
.hamburger-menu.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Mobile Nav (hidden by default) */
.main-nav .nav-list { flex-direction: column; align-items: flex-start; gap: 15px; padding: 20px; }
.main-nav .nav-list li a { font-size: 18px; }

/* Overlay for mobile menu */
.overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); z-index: 999; }

/* Buttons */
.btn { background: var(--btn-gradient); color: var(--text-main); padding: 10px 20px; border-radius: 25px; text-decoration: none; font-weight: bold; font-size: 15px; transition: all 0.3s ease; border: 1px solid var(--border-color); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: inline-flex; justify-content: center; align-items: center; cursor: pointer; }
.btn:hover { box-shadow: 0 0 15px var(--glow-color); transform: translateY(-2px); }
.btn-secondary { background: var(--main-color); border: 1px solid var(--aux-color); }
.btn-secondary:hover { background: var(--aux-color); box-shadow: 0 0 15px var(--aux-color); }

/* Site Footer */
.site-footer { background-color: var(--card-bg); padding: 40px 0 20px; color: var(--text-secondary); font-size: 14px; line-height: 1.6; }
.footer-top-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; max-width: 1200px; margin: 0 auto; padding: 0 30px; }
.footer-col { margin-bottom: 20px; }
.footer-about .footer-logo { color: var(--gold-color); font-size: 24px; font-weight: bold; text-decoration: none; display: block; margin-bottom: 15px; }
.footer-about .footer-logo:hover { color: var(--aux-color); }
.footer-description { color: var(--text-secondary); margin-bottom: 15px; overflow-wrap: break-word; }
.footer-heading { font-size: 18px; color: var(--text-main); margin-bottom: 20px; position: relative; }
.footer-heading::after { content: ''; display: block; width: 40px; height: 2px; background-color: var(--gold-color); margin-top: 8px; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 10px; }
.footer-nav li a { color: var(--text-secondary); text-decoration: none; transition: color 0.3s ease; white-space: nowrap; }
.footer-nav li a:hover { color: var(--gold-color); }
.footer-slot-anchor-inner { min-height: 1px; }
.footer-bottom { background-color: var(--deep-navy); text-align: center; padding: 20px 30px; margin-top: 40px; border-top: 1px solid var(--divider-color); color: var(--text-secondary); }
.footer-bottom p { margin: 0; }

/* Responsive adjustments */
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { padding-top: var(--header-offset); overflow-x: hidden; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }

  .header-top { min-height: 60px !important; height: 60px !important; }
  .header-container { width: 100%; max-width: none; padding: 0 15px; position: relative; justify-content: center; }
  .logo { flex: 1 !important; display: flex !important; justify-content: center !important; align-items: center !important; font-size: 24px; max-width: calc(100% - 100px); }
  .desktop-nav-buttons { display: none !important; }
  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    width: 100%; max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
  }
  .mobile-nav-buttons .btn {
    flex: 1; min-width: 0;
    max-width: calc(50% - 5px);
    box-sizing: border-box;
    padding: 8px 12px;
    font-size: 13px;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .hamburger-menu { display: block; position: absolute; left: 15px; top: 50%; transform: translateY(-50%); }
  .main-nav {
    min-height: 48px !important; height: 100vh;
    position: fixed; top: var(--header-offset); left: 0;
    width: 280px; transform: translateX(-100%);
    transition: transform 0.3s ease;
    background-color: var(--card-bg);
    padding-top: 20px; z-index: 1001;
    display: none; /* Default hidden */
    overflow-y: auto;
  }
  .main-nav.active {
    transform: translateX(0);
    display: block; /* Show when active */
  }
  .main-nav .nav-container { max-width: none; padding: 0; height: auto; }
  .nav-list { flex-direction: column; align-items: flex-start; gap: 15px; padding: 0 20px; }
  .nav-list li a { font-size: 16px; width: 100%; padding: 10px 0; }

  .footer-top-grid { grid-template-columns: 1fr; padding: 0 15px; }
  .footer-col { margin-bottom: 30px; }
  .footer-bottom { padding: 20px 15px; margin-top: 30px; }
}
/* 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;
}