:root { --primary: #C61F1F; --secondary: #E53030; --button: linear-gradient(180deg, #FFB04A 0%, #D86A14 100%); --card-bg: #2A1212; --bg: #140C0C; --text-main: #FFF1E8; --border: #6A1E1E; --gold: #F3C54D; --deep-red: #7E0D0D; --header-offset: 122px; --header-offset-mobile: 110px; }
body { padding-top: var(--header-offset); margin: 0; 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, 0.5); border-bottom: 1px solid var(--border); }
.header-top { background-color: var(--deep-red); width: 100%; border-bottom: 1px solid var(--border); }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; min-height: 68px; padding: 0 30px; }
.header-left { display: flex; align-items: center; gap: 10px; }
.hamburger-menu { display: none; background: none; border: 2px solid var(--gold); border-radius: 8px; width: 42px; height: 42px; padding: 8px; cursor: pointer; flex-direction: column; justify-content: space-between; align-items: center; background-color: rgba(0, 0, 0, 0.3); }
.hamburger-line { display: block; width: 100%; height: 2px; background-color: var(--gold); border-radius: 2px; transition: all 0.3s ease; }
.hamburger-menu.active .hamburger-line:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger-menu.active .hamburger-line:nth-child(2) { opacity: 0; }
.hamburger-menu.active .hamburger-line:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
.logo { display: block; font-size: 28px; font-weight: 900; color: var(--gold); text-decoration: none; text-transform: uppercase; letter-spacing: 1px; white-space: nowrap; }
.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.btn { display: inline-block; padding: 10px 24px; font-size: 14px; font-weight: 700; text-decoration: none; border-radius: 8px; margin: 0 4px; white-space: nowrap; transition: transform 0.2s ease, box-shadow 0.2s ease; flex-shrink: 0; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3); }
.btn-register { background: var(--button); color: #1a0a0a; border: 2px solid var(--gold); box-shadow: 0 4px 15px rgba(216, 106, 20, 0.4); }
.btn-login { background: var(--gold); color: #1a0a0a; border: 2px solid var(--gold); box-shadow: 0 4px 15px rgba(243, 197, 77, 0.4); }
.main-nav { background-color: var(--card-bg); width: 100%; display: flex; min-height: 52px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3); }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; width: 100%; gap: 8px; padding: 0 20px; }
.nav-link { color: var(--text-main); text-decoration: none; font-size: 14px; font-weight: 500; padding: 10px 15px; border-radius: 6px; transition: color 0.3s ease, background-color 0.3s ease; position: relative; white-space: nowrap; }
.nav-link:hover { color: var(--gold); background-color: rgba(198, 31, 31, 0.3); }
.nav-link.active { color: var(--gold); }
.nav-link.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background-color: var(--gold); border-radius: 3px; }
.mobile-nav-buttons { display: none; background-color: var(--card-bg); padding: 8px 20px; gap: 10px; border-top: 1px solid var(--border); z-index: 999; }
.mobile-nav-buttons .btn { flex: 1; text-align: center; padding: 10px 16px; font-size: 13px; }
.mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); z-index: 998; }
.site-footer { background-color: var(--card-bg); color: var(--text-main); padding: 10px 20px 5px; border-top: 2px solid var(--primary); max-width: 100%; overflow-x: hidden; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; padding: 40px 0 20px; }
.footer-column { min-width: 0; }
.footer-brand { display: flex; flex-direction: column; gap: 15px; }
.footer-logo { display: inline-block; font-size: 24px; font-weight: 900; color: var(--gold); text-decoration: none; letter-spacing: 1px; }
.footer-description { font-size: 14px; line-height: 1.6; color: var(--text-main); opacity: 0.9; }
.footer-heading { font-size: 16px; font-weight: 700; color: var(--gold); margin-bottom: 15px; border-bottom: 2px solid var(--primary); padding-bottom: 8px; display: inline-block; }
.footer-nav { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a { color: var(--text-main); text-decoration: none; font-size: 14px; padding: 3px 0; transition: color 0.3s ease, text-indent 0.3s ease; text-align: left; }
.footer-nav a:hover { color: var(--gold); text-indent: 5px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 15px 0; text-align: center; }
.footer-copyright { font-size: 13px; color: var(--text-main); margin: 0; opacity: 0.8; }
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { padding-top: var(--header-offset); overflow-x: hidden; }
  .site-header { box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5); }
  .header-container { min-height: 60px; padding: 0 15px; width: 100%; max-width: none; box-sizing: border-box; }
  .header-left { flex: 1; display: flex; align-items: center; gap: 8px; }
  .hamburger-menu { display: flex; width: 38px; height: 38px; padding: 6px; }
  .logo { font-size: 22px; flex: 1; text-align: center; }
  .desktop-nav-buttons { display: none; }
  .nav-container { display: flex; flex-direction: column; align-items: flex-start; gap: 5px; padding: 15px; width: 100%; max-width: 100%; box-sizing: border-box; }
  .main-nav { display: none; flex-direction: column; position: fixed; top: 0; left: 0; width: 75%; max-width: 320px; height: 100vh; min-height: 100vh; background-color: var(--card-bg); z-index: 1000; transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: 2px 0 20px rgba(0, 0, 0, 0.6); overflow-y: auto; padding-top: 20px; }
  .main-nav.active { display: block; transform: translateX(0); }
  .mobile-menu-overlay.active { display: block; }
  .mobile-nav-buttons { display: flex; position: fixed; top: 60px; left: 0; width: 100%; box-sizing: border-box; }
  .nav-link { font-size: 15px; padding: 12px 15px; width: 100%; box-sizing: border-box; }
  .site-footer { padding: 10px 15px 5px; }
  .footer-container { grid-template-columns: 1fr; gap: 25px; padding: 30px 0 20px; }
  .footer-column { width: 100%; }
  .footer-brand { text-align: center; align-items: center; }
  .footer-heading { text-align: left; width: 100%; }
  .footer-nav { flex-direction: row; flex-wrap: wrap; gap: 6px; justify-content: flex-start; }
  .footer-nav a { margin-right: 15px; }
  .footer-copyright { text-align: center; }
}
@media (min-width: 769px) and (max-width: 992px) {
  .nav-container { justify-content: center; gap: 2px; padding: 0 10px; }
  .desktop-nav-buttons .btn { padding: 8px 18px; }
  .btn { 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;
}