:root { --header-offset: 122px; --primary: #11A84E; --secondary: #22C768; --btn-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%); --bg-card: #11271B; --bg-main: #08160F; --text-main: #F2FFF6; --text-secondary: #A7D9B8; --border-color: #2E7A4E; --glow: #57E38D; --gold: #F2C14E; --divider: #1E3A2A; --deep-green: #0A4B2C; }
body { padding-top: var(--header-offset); margin: 0; background-color: var(--bg-main); font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background-color: var(--bg-main); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7); border-bottom: 2px solid var(--border-color); }
.header-top { background-color: var(--deep-green); width: 100%; }
.header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 30px; min-height: 68px; }
.logo { color: var(--text-main); font-size: 26px; font-weight: 800; text-decoration: none; letter-spacing: 1px; white-space: nowrap; display: inline-block; text-shadow: 0 0 12px rgba(87, 227, 141, 0.5); }
.logo:hover { color: var(--glow); }
.desktop-nav-buttons { display: flex; gap: 10px; align-items: center; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 24px; font-weight: 700; font-size: 14px; text-decoration: none; color: var(--text-main); transition: all 0.3s ease; border: none; cursor: pointer; text-align: center; white-space: nowrap; min-height: 20px; line-height: 1.2; }
.btn-register { background: var(--btn-gradient); box-shadow: 0 0 15px rgba(42, 209, 111, 0.4); }
.btn-login { background: linear-gradient(135deg, var(--gold), #d49c2a); color: #1a1a1a; box-shadow: 0 0 12px rgba(242, 193, 78, 0.3); }
.btn-download { background: linear-gradient(135deg, var(--secondary), var(--primary)); border: 1px solid var(--glow); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(87, 227, 141, 0.5); }
.main-nav { background-color: var(--bg-card); width: 100%; display: flex; border-top: 1px solid var(--divider); }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 2px; padding: 0 20px; width: 100%; }
.nav-link { color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 600; padding: 14px 16px; display: inline-block; transition: color 0.3s ease, background-color 0.3s ease; border-bottom: 3px solid transparent; white-space: nowrap; }
.nav-link:hover { color: var(--text-main); background-color: rgba(17, 168, 78, 0.15); }
.nav-link.active { color: var(--glow); border-bottom-color: var(--glow); }
.hamburger-menu { display: none; }
.mobile-menu-overlay { display: none; }
.mobile-nav-buttons { display: none; }
.site-footer { background-color: var(--deep-green); color: var(--text-secondary); margin-top: 40px; border-top: 3px solid var(--primary); }
.footer-container { max-width: 1200px; margin: 0 auto; padding: 40px 20px 20px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 30px; }
.footer-logo { color: var(--text-main); font-size: 24px; font-weight: 800; text-decoration: none; display: inline-block; margin-bottom: 15px; }
.footer-description { font-size: 14px; line-height: 1.6; margin: 0; color: var(--text-secondary); }
.footer-title { color: var(--text-main); font-size: 16px; margin-bottom: 15px; padding-bottom: 8px; border-bottom: 1px solid var(--border-color); }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 10px; }
.footer-nav a { color: var(--text-secondary); text-decoration: none; font-size: 14px; transition: color 0.3s ease, padding-left 0.3s ease; }
.footer-nav a:hover { color: var(--glow); padding-left: 6px; }
.footer-bottom { border-top: 1px solid var(--divider); margin-top: 30px; padding-top: 20px; text-align: center; }
.copyright { margin: 0; font-size: 14px; color: var(--text-secondary); }
@media (max-width: 768px) {
:root { --header-offset: 156px; }
.header-container { width: 100%; max-width: none; padding: 0 15px; min-height: 60px; }
.logo { font-size: 20px; order: 2; flex: 1; text-align: center; }
.desktop-nav-buttons { display: none; }
.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: 1101; order: 1; padding: 0; }
.hamburger-menu span { display: block; width: 24px; height: 3px; background-color: var(--text-main); margin: 3px 0; border-radius: 2px; transition: all 0.3s ease; }
.hamburger-menu.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.hamburger-menu.active span:nth-child(2) { opacity: 0; }
.hamburger-menu.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }
.mobile-nav-buttons { display: block; background-color: var(--deep-green); border-top: 1px solid var(--divider); width: 100%; position: relative; z-index: 1000; }
.mobile-buttons-container { display: flex; justify-content: center; gap: 8px; padding: 8px 10px; max-width: 600px; margin: 0 auto; }
.mobile-buttons-container .btn { flex: 1; padding: 8px 10px; font-size: 13px; min-height: 18px; }
.main-nav { display: none; flex-direction: column; position: fixed; top: 0; left: 0; width: 280px; height: 100vh; background-color: var(--bg-card); transform: translateX(-100%); transition: transform 0.3s ease; overflow-y: auto; z-index: 1100; border-top: none; border-right: 2px solid var(--border-color); }
.main-nav.active { display: flex; transform: translateX(0); }
.nav-container { flex-direction: column; align-items: stretch; padding: 70px 0 20px; gap: 0; }
.nav-link { padding: 15px 24px; border-bottom: 1px solid var(--divider); border-left: 3px solid transparent; font-size: 15px; }
.nav-link.active { border-left-color: var(--glow); background-color: rgba(87, 227, 141, 0.1); }
.mobile-menu-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); backdrop-filter: blur(2px); z-index: 1050; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; }
.mobile-menu-overlay.active { display: block; opacity: 1; visibility: visible; }
body.no-scroll { overflow: hidden; }
.footer-grid { grid-template-columns: 1fr; gap: 25px; text-align: center; }
.footer-nav a:hover { padding-left: 0; }
.footer-bottom { margin-top: 20px; }
.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;
}