:root { --header-offset: 122px; --primary: #FF8C1A; --secondary: #FFA53A; --deep-orange: #D96800; --card-bg: #17191F; --bg-dark: #0D0E12; --text-main: #FFF3E6; --border-color: #A84F0C; --glow: #FFB04D; }
body { padding-top: var(--header-offset); margin: 0; background-color: var(--bg-dark); color: var(--text-main); font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: var(--bg-dark); box-shadow: 0 4px 20px rgba(0,0,0,0.5); border-bottom: 1px solid var(--border-color); }
.header-top { background-color: #1a1c23; width: 100%; min-height: 68px; display: flex; align-items: center; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding-left: 30px; padding-right: 30px; width: 100%; box-sizing: border-box; gap: 20px; }
.logo { font-size: 32px; font-weight: 900; color: var(--text-main); text-decoration: none; letter-spacing: 1px; display: inline-flex; align-items: center; background: linear-gradient(135deg, #FF8C1A 0%, #A84F0C 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; white-space: nowrap; }
.logo::before { content: ''; display: none; }
.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.btn { display: inline-block; min-height: 40px; line-height: 40px; padding: 0 24px; border-radius: 8px; font-weight: 700; font-size: 14px; text-transform: uppercase; text-decoration: none; text-align: center; transition: all 0.3s ease; border: 1px solid transparent; white-space: nowrap; }
.btn-primary { background: linear-gradient(180deg, #FFA53A 0%, #D96800 100%); color: #17191F; border-color: #FFB04D; box-shadow: 0 0 15px rgba(255, 176, 77, 0.3); }
.btn-primary:hover { filter: brightness(1.1); box-shadow: 0 0 25px rgba(255, 176, 77, 0.6); transform: translateY(-2px); }
.btn-secondary { background: linear-gradient(180deg, #ffb45e 0%, #e07818 100%); color: #17191F; border-color: #FFA53A; }
.btn-secondary:hover { filter: brightness(1.1); box-shadow: 0 0 20px rgba(255, 140, 26, 0.5); transform: translateY(-2px); }
.main-nav { background-color: #17191F; width: 100%; display: flex; min-height: 52px; border-top: 1px solid var(--border-color); }
.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; width: 100%; box-sizing: border-box; }
.nav-link { color: var(--text-main); text-decoration: none; padding: 8px 14px; font-size: 14px; font-weight: 600; border-radius: 4px; transition: background 0.3s ease, color 0.3s ease; white-space: nowrap; border: 1px solid transparent; }
.nav-link:hover { color: var(--secondary); background: rgba(255, 140, 26, 0.1); border-color: var(--border-color); }
.hamburger-menu { display: none; }
.site-footer { background-color: #121318; border-top: 2px solid var(--border-color); padding: 40px 0 0; margin-top: 40px; }
.footer-container { max-width: 1200px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 30px; padding: 0 20px 30px; }
.footer-column { flex: 1; min-width: 200px; }
.footer-brand { flex: 2; min-width: 280px; }
.footer-logo { display: inline-block; color: var(--text-main); font-size: 24px; font-weight: 900; text-decoration: none; margin-bottom: 12px; }
.footer-desc { color: #cccccc; line-height: 1.7; font-size: 14px; }
.footer-title { color: var(--secondary); font-size: 16px; margin: 0 0 15px; padding-bottom: 8px; border-bottom: 2px solid var(--border-color); }
.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { color: #dddddd; text-decoration: none; font-size: 14px; transition: color 0.3s ease, padding-left 0.3s ease; }
.footer-nav a:hover { color: var(--secondary); padding-left: 5px; }
.footer-bottom { background-color: #0a0b0e; text-align: center; padding: 16px 20px; border-top: 1px solid var(--border-color); }
.footer-bottom p { color: #aaaaaa; font-size: 13px; margin: 0; }
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  .site-header { background: var(--bg-dark); }
  .header-top { min-height: 60px; }
  .header-container { width: 100%; max-width: none; padding-left: 12px; padding-right: 12px; gap: 8px; justify-content: space-between; }
  .logo { font-size: 22px; flex: 1; text-align: center; }
  .desktop-nav-buttons { display: none; }
  .main-nav { display: none; flex-direction: column; position: fixed; top: 0; left: 0; width: 280px; height: 100vh; background: rgba(23, 25, 31, 0.98); z-index: 1002; transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: 2px 0 15px rgba(0,0,0,0.5); border-right: 1px solid var(--border-color); }
  .main-nav.active { display: block; transform: translateX(0); }
  .nav-container { flex-direction: column; align-items: flex-start; width: 100%; max-width: none; padding: 80px 15px 20px; gap: 0; }
  .nav-link { width: 100%; padding: 12px 10px; font-size: 15px; border-bottom: 1px solid rgba(255, 140, 26, 0.15); }
  .hamburger-menu { display: flex; flex-direction: column; justify-content: center; align-items: center; width: 44px; height: 44px; background: transparent; border: none; cursor: pointer; z-index: 1004; order: -1; }
  .hamburger-menu .bar { display: block; width: 24px; height: 2px; background: var(--secondary); margin: 3px 0; transition: transform 0.3s ease, opacity 0.3s ease; }
  .hamburger-menu.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); background: #fff; }
  .hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
  .hamburger-menu.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); background: #fff; }
  .mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.65); z-index: 1001; }
  .mobile-menu-overlay.active { display: block; }
  .mobile-nav-buttons { display: flex; background: #1a1c23; padding: 8px 0; justify-content: center; gap: 12px; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
  .mobile-nav-buttons .btn { min-height: 36px; line-height: 36px; font-size: 13px; padding: 0 18px; color: #17191F; }
  .footer-container { flex-direction: column; gap: 25px; }
  .footer-column { min-width: auto; }
}
@media (min-width: 769px) {
  .mobile-nav-buttons { display: none; }
}
/* 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;
}