:root { --primary: #FF8C1A; --secondary: #FFA53A; --bg-dark: #0D0E12; --bg-card: #17191F; --text-main: #FFF3E6; --border: #A84F0C; --glow: #FFB04D; --deep-orange: #D96800; --header-offset: 122px; --header-offset-mobile: 110px; }
* { margin: 0; padding: 0; box-sizing: border-box; font-family: Arial, Helvetica, sans-serif; }
body { background-color: #0D0E12; color: #FFF3E6; padding-top: var(--header-offset); }
a { text-decoration: none; color: inherit; }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: #0D0E12; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6); border-bottom: 2px solid #A84F0C; min-height: auto; }
.header-top { background-color: #17191F; width: 100%; border-bottom: 1px solid #A84F0C; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 10px 30px; min-height: 68px; }
.logo { font-size: 2em; font-weight: 900; background: linear-gradient(135deg, #FFA53A 0%, #FF8C1A 40%, #D96800 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: inline-block; letter-spacing: -1px; text-shadow: 0 0 30px rgba(255, 140, 26, 0.4); }
.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.btn { display: inline-block; padding: 10px 24px; border-radius: 50px; font-weight: 700; font-size: 0.9em; text-transform: uppercase; letter-spacing: 0.5px; border: 2px solid transparent; cursor: pointer; text-decoration: none; color: #FFF3E6; background: linear-gradient(180deg, #FFA53A 0%, #D96800 100%); box-shadow: 0 4px 15px rgba(255, 140, 26, 0.3); transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s; }
.btn:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(255, 176, 77, 0.4); border-color: var(--glow); color: #FFF; }
.btn:active { transform: translateY(-1px); }
.btn-register { background: linear-gradient(135deg, #FF8C1A, #D96800); border-color: #FFB04D; }
.btn-download { background: linear-gradient(135deg, #FFA53A, #FF8C1A); }
.main-nav { width: 100%; background-color: #17191F; display: flex; justify-content: center; border-top: 1px solid rgba(255, 140, 26, 0.4); border-bottom: 1px solid rgba(255, 140, 26, 0.4); min-height: 52px; }
.nav-container { max-width: 1200px; width: 100%; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 4px; padding: 0 20px; flex-wrap: wrap; }
.nav-container a { color: #FFF3E6; text-decoration: none; padding: 12px 18px; font-size: 0.95em; font-weight: 600; letter-spacing: 0.3px; border-bottom: 3px solid transparent; transition: color 0.3s, border-color 0.3s, background-color 0.3s; position: relative; white-space: nowrap; border-radius: 4px 4px 0 0; }
.nav-container a:hover, .nav-container a.active { color: #FFB04D; border-color: #FF8C1A; background-color: rgba(255, 140, 26, 0.08); }
.mobile-nav-buttons { display: none; }
.mobile-menu-overlay { display: none; }
.hamburger-menu { display: none; }
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { overflow-x: hidden; padding-top: var(--header-offset); }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }
  body { overflow-x: hidden; }
  .site-header { box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5); }
  .header-container { width: 100%; max-width: none; padding: 8px 15px; min-height: 60px; }
  .logo { font-size: 1.8em; }
  .desktop-nav-buttons { display: none; }
  .mobile-nav-buttons { display: flex; width: 100%; justify-content: center; gap: 12px; padding: 8px 15px; background-color: #0D0E12; border-bottom: 1px solid #A84F0C; min-height: 48px; }
  .mobile-nav-buttons .btn { flex: 1; max-width: 180px; text-align: center; padding: 8px 12px; font-size: 0.85em; }
  .main-nav { display: none; position: fixed; top: 0; left: 0; z-index: 1001; flex-direction: column; background-color: rgba(23, 25, 31, 0.98); width: 260px; height: 100vh; height: 100dvh; overflow-y: auto; transform: translateX(-100%); transition: transform 0.3s ease, display 0.3s ease; border-right: 2px solid #FF8C1A; border-top: none; justify-content: flex-start; align-items: flex-start; }
  .main-nav.active { display: block; transform: translateX(0); }
  .nav-container { flex-direction: column; gap: 0; padding: 0; width: 100%; max-width: none; }
  .nav-container a { width: 100%; padding: 15px 20px; border-bottom: 1px solid rgba(255, 140, 26, 0.2); text-align: left; border-left: 3px solid transparent; color: #FFF3E6; font-size: 1em; }
  .nav-container a:hover, .nav-container a.active { background-color: rgba(255, 140, 26, 0.15); border-left-color: #FF8C1A; border-bottom-color: rgba(255, 140, 26, 0.2); color: #FFB04D; }
  .mobile-menu-overlay.active { display: block; position: fixed; top: 0; left: 0; width: 100%; height: 100%; height: 100dvh; background-color: rgba(13, 14, 18, 0.6); z-index: 999; transition: opacity 0.3s ease; }
  .hamburger-menu { display: flex; position: absolute; top: 25px; left: 18px; transform: translateY(-50%); padding: 8px 10px; background-color: transparent; border: 1px solid #A84F0C; border-radius: 8px; cursor: pointer; z-index: 1002; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
  .hamburger-menu span { display: block; width: 22px; height: 3px; background-color: #FFB04D; border-radius: 4px; transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s; }
  .hamburger-menu.active span { background-color: #FFB04D; }
  .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .hamburger-menu.active span:first-child { transform: translateY(8px) rotate(45deg); }
  .hamburger-menu.active span:last-child { transform: translateY(-8px) rotate(-45deg); }
  .header-top { border-bottom-color: rgba(255, 140, 26, 0.4); }
}
.site-footer { background-color: #17191F; color: #FFF3E6; padding: 40px 20px 0; border-top: 2px solid #A84F0C; margin-top: 40px; }
.footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; padding: 30px 30px 40px; }
.footer-col h4 { font-size: 1.1em; font-weight: 700; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid #FF8C1A; color: #FFB04D; position: relative; }
.footer-col h4::after { content: ""; position: absolute; bottom: -2px; left: 0; width: 40px; height: 2px; background-color: #FFA53A; }
.footer-brand p { line-height: 1.8; font-size: 0.9em; opacity: 0.9; }
.footer-nav ul, .footer-contact ul { list-style: none; }
.footer-nav ul li, .footer-contact ul li { margin-bottom: 12px; }
.footer-nav ul li a, .footer-contact ul li a { color: #FFF3E6; font-size: 0.9em; opacity: 0.8; transition: color 0.2s, padding-left 0.2s; position: relative; }
.footer-nav ul li a:hover, .footer-contact ul li a:hover { color: #FFB04D; padding-left: 10px; opacity: 1; }
.footer-nav ul li a::before, .footer-contact ul li a::before { content: "▸"; color: #FF8C1A; margin-right: 5px; }
.footer-bottom { border-top: 1px solid rgba(255, 140, 26, 0.2); padding: 20px; text-align: center; font-size: 0.85em; background-color: rgba(13, 14, 18, 0.5); width: 100%; }
.footer-logo { font-size: 2em; font-weight: 900; background: linear-gradient(135deg, #FFA53A 0%, #FF8C1A 40%, #D96800 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: inline-block; margin-bottom: 15px; text-shadow: 0 0 30px rgba(255, 140, 26, 0.5); }
@media (max-width: 768px) {
  .footer-container { grid-template-columns: 1fr; gap: 30px; padding: 20px; }
  .footer-bottom { font-size: 0.75em; }
}
/* 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;
}