.site-header { position: fixed; top: 0; width: 100%; z-index: 1000; background-color: #140C0C; box-shadow: 0 2px 15px rgba(0, 0, 0, 0.5); min-height: auto; }
.header-top { width: 100%; background-color: #7E0D0D; border-bottom: 2px solid #6A1E1E; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding-left: 30px; padding-right: 30px; min-height: 68px; }
.logo { font-size: 22px; font-weight: 800; color: #F3C54D; text-decoration: none; letter-spacing: 0.5px; text-transform: uppercase; line-height: 1.2; }
.logo:hover { color: #FFB04A; }
.desktop-nav-buttons { display: flex; gap: 10px; align-items: center; }
.btn { display: inline-block; padding: 10px 24px; border-radius: 6px; font-weight: 700; font-size: 14px; text-decoration: none; color: #140C0C; text-align: center; transition: transform 0.2s; border: none; cursor: pointer; }
.btn:hover { transform: translateY(-2px); }
.btn-dang-ky { background: linear-gradient(180deg, #FFB04A 0%, #D86A14 100%); color: #140C0C; box-shadow: 0 2px 8px rgba(216, 106, 20, 0.5); }
.btn-dang-nhap { background: linear-gradient(180deg, #F3C54D 0%, #C61F1F 100%); color: #FFF1E8; box-shadow: 0 2px 8px rgba(198, 31, 31, 0.4); }
.main-nav { height: auto; background-color: #C61F1F; border-top: 1px solid #6A1E1E; box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.2); max-height: 52px; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 10px; padding: 12px 25px; height: auto; flex-wrap: wrap; }
.nav-container a { color: #FFF1E8; text-decoration: none; font-weight: 600; font-size: 13px; padding: 6px 14px; border-radius: 4px; transition: all 0.3s; white-space: nowrap; }
.nav-container a:hover { background-color: rgba(255, 241, 232, 0.15); color: #F3C54D; }
.mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(20, 12, 12, 0.8); z-index: 1002; opacity: 0; visibility: hidden; transition: opacity 0.3s ease; }
.hamburger-menu { display: none; position: absolute; top: 18px; left: 15px; background: transparent; border: none; cursor: pointer; width: 35px; height: 35px; z-index: 1003; padding: 5px; }
.hamburger-menu span { display: block; width: 100%; height: 3px; margin: 6px 0; background-color: #FFB04A; border-radius: 3px; transition: all 0.3s ease; }
.mobile-nav-buttons { display: none; width: 100%; background-color: #7E0D0D; padding: 10px 15px; justify-content: center; gap: 12px; z-index: 1000; }
.mobile-nav-buttons .btn { flex: 1; white-space: nowrap; padding: 10px 15px; font-size: 13px; }
:root { --header-offset: 122px; }
body { margin: 0; padding-top: var(--header-offset); background-color: #140C0C; color: #FFF1E8; font-family: 'Segoe UI', Arial, sans-serif; }
.page-content img { max-width: 100%; height: auto; }
.site-footer { background-color: #1E0B0B; border-top: 1px solid #6A1E1E; padding: 15px 20px; }
.footer-main { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; padding: 30px 0; }
.footer-column h4 { color: #F3C54D; font-size: 16px; margin-bottom: 15px; font-weight: 700; }
.footer-column p { color: #FFF1E8; font-size: 14px; line-height: 1.6; }
.footer-column a { color: #E5C4B0; text-decoration: none; font-size: 14px; line-height: 2; transition: color 0.3s; }
.footer-column a:hover { color: #F3C54D; }
.footer-column ul { list-style: none; padding: 0; margin: 0; }
.footer-copyright { margin-top: 10px; }
.footer-copyright p { font-size: 13px; color: #E5C4B0; }
@media (max-width: 900px) { .footer-main { grid-template-columns: repeat(2, 1fr); gap: 25px; } }
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  .site-header { display: block; }
  .header-top { position: relative; }
  .header-container { min-height: 60px; max-width: none; width: 100%; padding-left: 15px; padding-right: 15px; justify-content: center; position: relative; }
  .logo { order: 1; display: block; font-size: 17px; text-align: center; margin: 0 auto; }
  .desktop-nav-buttons { display: none; }
  .hamburger-menu { display: block; }
  .main-nav { display: none; position: fixed; top: 0; left: 0; width: 80%; max-width: 320px; height: 100%; background-color: #2A1212; z-index: 1003; padding-top: 70px; flex-direction: column; transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: 2px 0 15px rgba(0, 0, 0, 0.6); overflow-y: auto; }
  .main-nav.active { display: block; transform: translateX(0); }
  .nav-container { flex-direction: column; align-items: flex-start; gap: 5px; padding: 10px; max-width: none; width: 100%; justify-content: flex-start; }
  .nav-container a { display: block; width: 100%; font-size: 15px; padding: 12px 15px; border-bottom: 1px solid #6A1E1E; color: #FFF1E8; }
  .nav-container a:hover { background-color: rgba(243, 197, 77, 0.1); color: #F3C54D; }
  .mobile-menu-overlay.active { display: block; opacity: 1; visibility: visible; }
  .mobile-nav-buttons { display: flex; order: 2; }
  .hamburger-menu.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
  .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .hamburger-menu.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
  .page-content { overflow-x: hidden; max-width: 100%; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  body { overflow-x: hidden; }
}
@media (min-width: 769px) and (max-width: 1024px) { .nav-container { gap: 5px; padding: 12px 10px; } .nav-container a { font-size: 12px; padding: 6px 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;
}