:root {
  --primary: #C91F17;
  --secondary: #E53935;
  --btn-bg: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --card-bg: #D32F2F;
  --page-bg: #B71C1C;
  --text-main: #FFF5E1;
  --border-main: #F2B544;
  --glow: #FFCC66;
  --gold: #F4D34D;
  --deep-red: #7A0E0E;
  --header-offset: 122px;
}
body {
  margin: 0;
  padding-top: var(--header-offset);
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background-color: var(--page-bg);
  color: var(--text-main);
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--page-bg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  z-index: 1000;
}
.header-top {
  background: var(--deep-red);
}
.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  box-sizing: border-box;
}
.logo {
  font-size: 28px;
  font-weight: 900;
  color: var(--gold);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-style: italic;
  text-shadow: 0 2px 4px rgba(122, 14, 14, 0.8);
}
.desktop-nav-buttons {
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.btn-register {
  background: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  color: #B71C1C;
  border: 1px solid var(--border-main);
}
.btn-register:hover {
  box-shadow: 0 4px 12px rgba(255, 216, 106, 0.5);
  transform: translateY(-2px);
}
.btn-login {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #FFFFFF;
  border: 1px solid var(--border-main);
}
.btn-login:hover {
  box-shadow: 0 4px 12px rgba(255, 204, 102, 0.5);
  transform: translateY(-2px);
}
.main-nav {
  display: flex;
  background: var(--primary);
  border-top: 2px solid var(--border-main);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
  flex-wrap: wrap;
  min-height: 48px;
  padding: 4px 12px;
}
.nav-link {
  color: #FFFFFF;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 12px;
  border-radius: 4px;
  transition: background 0.3s, color 0.3s;
}
.nav-link:hover {
  background: var(--glow);
  color: var(--deep-red);
}
.hamburger-menu {
  display: none;
}
.mobile-menu-overlay {
  display: none;
}
.mobile-actions {
  display: none;
}
.site-footer {
  background: var(--deep-red);
  border-top: 3px solid var(--border-main);
  padding: 40px 20px 0;
  color: #FFFFFF;
}
.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 25px;
}
.footer-logo {
  font-size: 32px;
  font-weight: 900;
  color: var(--gold);
  text-decoration: none;
  text-transform: uppercase;
  font-style: italic;
}
.footer-description {
  line-height: 1.6;
  opacity: 0.9;
  margin-top: 12px;
  font-size: 14px;
}
.footer-heading {
  color: var(--gold);
  font-size: 16px;
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-left: 3px solid var(--border-main);
  padding-left: 10px;
}
.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav li {
  margin-bottom: 8px;
}
.footer-link {
  color: #FFFFFF;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s;
}
.footer-link:hover {
  color: var(--gold);
}
.footer-bottom {
  border-top: 1px solid rgba(242, 181, 68, 0.3);
  padding: 16px 0;
  text-align: center;
  font-size: 13px;
}
.copyright-text {
  margin: 0;
  opacity: 0.9;
}
@media (max-width: 768px) {
  :root {
    --header-offset: 110px;
  }
  .header-container {
    width: 100%;
    max-width: none;
    padding: 10px 12px;
  }
  .logo {
    flex: 1;
    text-align: center;
    font-size: 24px;
  }
  .desktop-nav-buttons {
    display: none;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    overflow-y: auto;
    background: var(--deep-red);
    padding-top: 60px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 4px 0 15px rgba(0, 0, 0, 0.5);
  }
  .main-nav.active {
    display: block;
    transform: translateX(0);
  }
  .nav-container {
    flex-direction: column;
    padding: 15px 0;
    width: 100%;
    max-width: none;
    align-items: flex-start;
    padding-left: 4px;
  }
  .nav-link {
    display: block;
    width: 100%;
    padding: 14px 24px;
    border-bottom: 1px solid rgba(242, 181, 68, 0.2);
    color: #FFF;
    font-size: 15px;
  }
  .nav-link:hover {
    background: var(--primary);
    color: #FFF;
  }
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 32px;
    height: 32px;
    cursor: pointer;
    z-index: 1001;
    padding: 0;
    background: none;
    border: none;
  }
  .hamburger-menu span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--gold);
    border-radius: 3px;
    margin: 3px auto;
    transition: all 0.3s ease;
  }
  .hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 5px);
  }
  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
  }
  .mobile-menu-overlay.active {
    display: block;
  }
  .mobile-actions {
    display: block;
    background: linear-gradient(180deg, var(--secondary) 0%, var(--primary) 100%);
    padding: 8px 4px;
  }
  .mobile-nav-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    padding: 0 10px;
    box-sizing: border-box;
    box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.5);
  }
  .mobile-nav-buttons .btn {
    flex: 1;
    white-space: nowrap;
    text-align: center;
    font-size: 15px;
    padding: 10px 12px;
  }
  body.no-scroll {
    overflow: hidden;
  }
  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-brand {
    grid-column: 1 / -1;
    text-align: center;
  }
  .footer-logo {
    font-size: 28px;
  }
  .site-footer {
    padding: 35px 14px 0;
  }
  .footer-description {
    font-size: 13px;
  }
  .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;
}