:root { --header-offset: 166px; --primary: #C61F1F; --secondary: #E53030; --btn-gradient: linear-gradient(180deg, #FFB04A 0%, #D86A14 100%); --card-bg: #2A1212; --bg: #140C0C; --text-main: #FFF1E8; --border: #6A1E1E; --gold: #F3C54D; --deep-red: #7E0D0D; }
body { margin: 0; padding-top: var(--header-offset); font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(--bg); color: var(--text-main); }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: var(--bg); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6); }
.header-top { background-color: var(--deep-red); width: 100%; border-bottom: 2px solid var(--gold); }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 10px 20px; min-height: 68px; box-sizing: border-box; }
.logo { font-size: 28px; font-weight: 900; color: var(--gold); text-decoration: none; text-transform: uppercase; letter-spacing: 1px; display: block; text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5); }
.desktop-nav-buttons { display: flex; gap: 10px; align-items: center; }
.btn { display: inline-block; padding: 10px 24px; border-radius: 25px; text-decoration: none; font-weight: 700; font-size: 14px; transition: all 0.3s ease; border: none; cursor: pointer; text-align: center; }
.btn-register { background: var(--btn-gradient); color: var(--bg); box-shadow: 0 4px 15px rgba(216, 106, 20, 0.4); }
.btn-register:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(216, 106, 20, 0.6); }
.btn-login { background: transparent; border: 2px solid var(--gold); color: var(--gold); }
.btn-login:hover { background: rgba(243, 197, 77, 0.15); }
.main-nav { background-color: var(--card-bg); width: 100%; display: flex; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 8px 20px; gap: 4px; flex-wrap: wrap; }
.nav-link { color: var(--text-main); text-decoration: none; font-size: 14px; font-weight: 600; padding: 8px 14px; border-radius: 4px; transition: all 0.3s ease; position: relative; white-space: nowrap; }
.nav-link:hover { color: var(--gold); background-color: rgba(243, 197, 77, 0.1); }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background-color: var(--gold); transition: width 0.3s ease; }
.nav-link:hover::after { width: 70%; }
.mobile-nav-buttons { display: none; }
.hamburger-menu { display: none; }
.mobile-menu-overlay { display: none; }
.site-footer { background-color: var(--card-bg); border-top: 3px solid var(--gold); margin-top: 40px; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; padding: 40px 20px; }
.footer-logo { font-size: 24px; font-weight: 900; color: var(--gold); text-decoration: none; text-transform: uppercase; }
.footer-desc { color: var(--text-main); font-size: 13px; line-height: 1.6; margin-top: 10px; opacity: 0.9; }
.footer-title { color: var(--gold); font-size: 16px; font-weight: 700; margin-bottom: 15px; text-transform: uppercase; letter-spacing: 1px; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 10px; }
.footer-nav a { color: var(--text-main); text-decoration: none; font-size: 14px; transition: all 0.3s ease; opacity: 0.85; }
.footer-nav a:hover { color: var(--gold); opacity: 1; padding-left: 5px; }
.footer-bottom { text-align: center; padding: 20px 15px; background-color: var(--bg); border-top: 1px solid var(--border); }
.footer-bottom p { margin: 0; font-size: 13px; color: var(--text-main); opacity: 0.8; }
@media (max-width: 768px) {
  :root { --header-offset: 146px; }
  .header-container { width: 100%; max-width: none; padding: 8px 15px; min-height: 60px; }
  .logo { font-size: 24px; }
  .main-nav { display: none; position: fixed; top: 0; right: 0; width: 280px; height: 100%; background-color: var(--card-bg); z-index: 1002; flex-direction: column; align-items: stretch; transform: translateX(100%); transition: transform 0.3s ease-in-out; overflow-y: auto; padding-top: 20px; box-shadow: -5px 0 25px rgba(0, 0, 0, 0.5); }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { width: 100%; max-width: none; flex-direction: column; align-items: stretch; padding: 10px 0; gap: 0; }
  .nav-link { padding: 14px 20px; font-size: 15px; border-bottom: 1px solid var(--border); border-radius: 0; }
  .nav-link::after { display: none; }
  .nav-link:hover { background-color: rgba(243, 197, 77, 0.1); color: var(--gold); }
  .desktop-nav-buttons { display: none; }
  .mobile-nav-buttons { display: flex; justify-content: center; gap: 10px; padding: 8px 15px; background-color: var(--bg); border-bottom: 1px solid var(--border); }
  .mobile-nav-buttons .btn { flex: 0 0 auto; }
  .hamburger-menu { display: flex; position: fixed; top: 12px; left: 15px; z-index: 1003; background: transparent; border: none; cursor: pointer; padding: 10px; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
  .hamburger-line { display: block; width: 24px; height: 2px; background-color: var(--gold); transition: all 0.3s ease; border-radius: 2px; }
  .hamburger-menu.active .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger-menu.active .hamburger-line:nth-child(2) { opacity: 0; }
  .hamburger-menu.active .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .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: 1001; }
  .mobile-menu-overlay.active { display: block; }
  .header-top { border-bottom: 1px solid var(--border); }
  .footer-container { grid-template-columns: 1fr; gap: 25px; padding: 30px 15px; }
  .footer-column { text-align: center; }
  .footer-nav { display: flex; flex-direction: column; align-items: center; gap: 5px; }
  .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;
}