.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: #FFFFFF; box-shadow: 0 4px 12px rgba(0,0,0,0.15); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
.header-top { background: linear-gradient(135deg, #8E0000 0%, #B71C1C 100%); 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; }
.logo { display: inline-block; font-size: 32px; font-weight: 900; color: #FFFFFF !important; text-decoration: none; letter-spacing: -0.5px; text-shadow: 0 2px 4px rgba(0,0,0,0.3); line-height: 1.2; }
.logo:hover { color: #FFFFFF; opacity: 0.9; }
.desktop-nav-buttons { display: flex; align-items: center; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; font-weight: 700; font-size: 14px; line-height: 1; padding: 12px 24px; border-radius: 8px; transition: all 0.3s ease; cursor: pointer; border: none; min-width: 100px; text-align: center; }
.btn-primary { color: #FFFFFF; background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%); box-shadow: 0 3px 6px rgba(229,57,53,0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 12px rgba(229,57,53,0.5); filter: brightness(1.05); }
.btn-secondary { color: #FFFFFF; background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%); box-shadow: 0 3px 6px rgba(229,57,53,0.35); }
.btn-secondary:hover { transform: translateY(-2px); box-shadow: 0 6px 12px rgba(229,57,53,0.45); filter: brightness(1.05); }
.main-nav { background-color: #FFFFFF; display: flex; flex-direction: row; position: static; width: 100%; border-bottom: 2px solid #E0E0E0; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 0 20px; min-height: 52px; flex-wrap: nowrap; gap: 0; }
.nav-link { color: #333333; text-decoration: none; font-weight: 600; font-size: 14px; padding: 12px 15px; transition: color 0.2s ease, background-color 0.2s ease; border-bottom: 3px solid transparent; white-space: nowrap; line-height: 1.4; }
.nav-link:hover { color: #E53935; background-color: rgba(255,90,79,0.08); border-bottom-color: #E53935; }
.hamburger-menu { display: none; background: none; border: none; padding: 10px; margin: 0; cursor: pointer; }
.hamburger-box { display: block; width: 24px; height: 18px; position: relative; }
.hamburger-inner { display: block; width: 24px; height: 2px; background-color: #FFFFFF; border-radius: 2px; position: absolute; top: 50%; left: 0; transform: translateY(-50%); transition: background-color 0.3s ease 0.2s; }
.hamburger-inner::before, .hamburger-inner::after { content: ""; display: block; width: 24px; height: 2px; background-color: #FFFFFF; border-radius: 2px; position: absolute; left: 0; transition: transform 0.3s ease; }
.hamburger-inner::before { top: -8px; }
.hamburger-inner::after { bottom: -8px; }
.hamburger-menu.active .hamburger-inner { background-color: transparent; transition: background-color 0.3s ease; }
.hamburger-menu.active .hamburger-inner::before { top: 0; transform: rotate(45deg); }
.hamburger-menu.active .hamburger-inner::after { bottom: 0; transform: rotate(-45deg); }
.mobile-menu-overlay { display: none; }
.mobile-nav-buttons { display: none; }
.site-footer { background-color: #1A1A2E; color: #FFFFFF; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; padding: 50px 20px 20px; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.15); }
.footer-brand { display: flex; flex-direction: column; gap: 15px; }
.footer-logo { font-size: 28px; font-weight: 900; color: #FFFFFF; line-height: 1.4; }
.footer-desc { font-size: 14px; color: rgba(255,255,255,0.75); line-height: 1.7; margin: 0; }
.footer-column { display: flex; flex-direction: column; align-items: flex-start; }
.footer-col-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; color: #FFFFFF; position: relative; padding-bottom: 8px; line-height: 1.4; }
.footer-col-title::after { content: ""; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background-color: #E53935; }
.footer-nav { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-nav li { line-height: 1.6; }
.footer-nav a { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 14px; transition: color 0.3s ease; }
.footer-nav a:hover { color: #E53935; text-decoration: underline; }
.footer-bottom { max-width: 1200px; margin: 20px auto 0; text-align: center; }
.copyright { font-size: 14px; color: rgba(255,255,255,0.6); margin: 0; line-height: 1.6; }
@media (max-width: 768px) {
  .site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: #FFFFFF; }
  .header-top { background: linear-gradient(135deg, #8E0000 0%, #B71C1C 100%); width: 100%; }
  .header-container { width: 100%; max-width: none; display: flex; justify-content: space-between; align-items: center; padding: 10px 20px; min-height: 60px; margin: 0; }
  .logo { font-size: 26px; order: 2; margin: 0 auto; display: inline-block; text-align: center; flex: 0 0 auto; }
  .hamburger-menu { display: block; order: 1; z-index: 1001; position: relative; }
  .desktop-nav-buttons { display: none; }
  .main-nav { display: none; transform: translateX(-100%); position: fixed; top: 60px; left: 0; width: 320px; max-width: 90%; height: calc(100vh - 60px); background-color: #FFFFFF; flex-direction: column; justify-content: flex-start; z-index: 1000; box-shadow: 2px 0 16px rgba(0,0,0,0.15); transition: transform 0.3s ease; }
  .main-nav.active { display: block; transform: translateX(0); }
  .nav-container { width: 100%; max-width: none; display: flex; flex-direction: column; justify-content: flex-start; align-items: stretch; padding: 0; min-height: 0; }
  .nav-link { display: block; width: 100%; padding: 16px 24px; border-bottom: 1px solid #F0F0F0; border-left: 3px solid transparent; white-space: normal; font-size: 15px; }
  .nav-link:hover { background-color: rgba(255,90,79,0.08); border-left-color: #E53935; }
  .mobile-nav-buttons { display: flex; justify-content: center; gap: 10px; padding: 8px 15px; background-color: #FFFFFF; border-bottom: 1px solid #E0E0E0; z-index: 999; position: relative; width: 100%; box-sizing: border-box; }
  .mobile-nav-buttons .btn { flex: 1; margin: 0; max-width: 180px; }
  .mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); z-index: 999; }
  .mobile-menu-overlay.show { display: block; }
  :root { --header-offset: 156px; }
  body { padding-top: var(--header-offset); }
  .page-content { overflow-x: hidden; max-width: 100%; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  body { overflow-x: hidden; }
  .footer-container { width: 100%; max-width: none; grid-template-columns: 1fr; gap: 30px; padding: 20px 0; }
  .footer-brand { align-items: flex-start; }
  .footer-column { align-items: flex-start; }
}
:root { --header-offset: 122px; }
body { padding-top: var(--header-offset); margin: 0; }
@media (max-width: 768px) {
  :root { --header-offset: 156px; }
}
/* 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;
}