:root { --header-offset: 164px; --primary: #FF8C1A; --secondary: #FFA53A; --btn-primary: linear-gradient(180deg, #FFA53A 0%, #D96800 100%); --card-bg: #17191F; --site-bg: #0D0E12; --text-main: #FFF3E6; --border-color: #A84F0C; --glow: #FFB04D; --deep-orange: #D96800; }
body { margin: 0; padding-top: var(--header-offset); background-color: var(--site-bg); color: var(--text-main); font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
.site-header { position: fixed; top: 0; left: 0; width: 100%; min-height: auto; background: var(--site-bg); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7); z-index: 1000; }
.header-top { background-color: #121318; border-bottom: 2px solid var(--deep-orange); width: 100%; }
.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 { color: var(--text-main); font-size: 2.1rem; font-weight: 800; text-decoration: none; letter-spacing: 0.5px; line-height: 1; display: flex; align-items: center; gap: 4px; }
.logo strong { color: var(--primary); }
.desktop-nav-buttons { display: flex; align-items: center; gap: 12px; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 50px; text-decoration: none; font-weight: 700; font-size: 14px; letter-spacing: 1px; transition: transform 0.2s, box-shadow 0.3s; border: none; cursor: pointer; }
.btn-primary { background: var(--btn-primary); color: #fff; box-shadow: 0 0 15px rgba(255, 164, 57, 0.5); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(255, 164, 57, 0.7); }
.btn-secondary { background: transparent; border: 2px solid var(--primary); color: var(--primary); box-shadow: inset 0 0 8px rgba(255, 140, 26, 0.15); }
.btn-secondary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255, 140, 26, 0.4); color: var(--text-main); border-color: var(--glow); }
.main-nav { background-color: #1a1c22; border-top: 1px solid var(--border-color); border-bottom: 2px solid var(--deep-orange); width: 100%; display: flex; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 0 20px; min-height: 52px; gap: 0; }
.nav-link { color: #c9c9c9; font-size: 15px; font-weight: 600; text-decoration: none; padding: 12px 14px; transition: color 0.3s; white-space: nowrap; border-bottom: 2px solid transparent; }
.nav-link:hover { color: var(--secondary); }
.nav-link.active { color: var(--primary); border-bottom-color: var(--primary); }
.mobile-nav-buttons { display: none; }
.mobile-menu-overlay { display: none; }
body.no-scroll { overflow: hidden; }
.site-footer { background-color: #0d0e12; color: var(--text-main); border-top: 4px solid var(--deep-orange); position: relative; overflow: hidden; }
.site-footer::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: var(--primary); box-shadow: 0 0 20px var(--glow); }
.footer-container { max-width: 1200px; margin: 0 auto; padding: 50px 30px 30px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-logo { color: var(--text-main); font-size: 1.9rem; font-weight: 800; text-decoration: none; }
.footer-logo strong { color: var(--primary); }
.footer-description { color: #b9b9b9; font-size: 0.9rem; line-height: 1.8; margin-top: 18px; }
.footer-title { color: var(--secondary); font-size: 1.1rem; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-title::after { content: ''; position: absolute; left: 0; bottom: 0; width: 40px; height: 2px; background: var(--deep-orange); }
.footer-nav { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a { color: #b9b9b9; text-decoration: none; font-size: 0.9rem; transition: color 0.3s, padding-left 0.3s; }
.footer-nav a:hover { color: var(--primary); padding-left: 5px; }
.footer-bottom { border-top: 1px solid var(--border-color); margin-top: 30px; }
.copyright-text { max-width: 1200px; margin: 0 auto; padding: 20px 30px; text-align: center; color: #888; font-size: 0.85rem; }
@media (max-width: 768px) { :root { --header-offset: 146px; }
  body { overflow-x: hidden; }
  .header-container { width: 100%; max-width: none; padding-left: 15px; padding-right: 15px; min-height: 60px; position: relative; }
  .nav-container { width: 100%; max-width: none; padding-left: 0; padding-right: 0; }
  .logo { font-size: 1.5rem; position: absolute; left: 50%; transform: translateX(-52%); }
  .mobile-nav-buttons { display: flex; justify-content: center; gap: 12px; padding: 10px 15px; background-color: #121318; border-bottom: 2px solid var(--border-color); z-index: 1000; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5); }
  .desktop-nav-buttons { display: none; }
  .btn { padding: 8px 18px; font-size: 13px; flex: 1; max-width: 160px; text-align: center; }
  .main-nav { display: none; position: fixed; top: 0; right: auto; left: 0; width: 80%; max-width: 340px; height: 100vh; background-color: #17191F; flex-direction: column; justify-content: flex-start; z-index: 1100; transform: translateX(-100%); transition: transform 0.3s ease; border: none; box-shadow: 4px 0 20px rgba(0, 0, 0, 0.6); overflow-y: auto; padding-top: 100px; }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-link { display: block; padding: 15px 25px; color: #eee; font-size: 1rem; border-bottom: 1px solid var(--border-color); border-left: 3px solid transparent; }
  .nav-link:hover { background: rgba(255, 138, 26, 0.2); color: var(--secondary); border-left-color: var(--primary); }
  .nav-link.active { background: rgba(255, 138, 26, 0.15); color: var(--primary); border-left-color: var(--primary); }
  .mobile-menu-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.85); z-index: 1050; }
  .mobile-menu-overlay.active { display: block; }
  .footer-container { grid-template-columns: 1fr 1fr; gap: 30px; padding: 40px 20px 20px; }
  .footer-brand-col { grid-column: 1 / -1; text-align: center; }
  .footer-logo { font-size: 1.6rem; }
  .footer-description { margin-left: auto; margin-right: auto; max-width: 100%; }
  .footer-title { font-size: 1rem; }
  .copyright-text { font-size: 0.78rem; padding: 16px 15px; }
  .footer-nav-col { padding-left: 15px; }
}
@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; } }
/* 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;
}