:root {
  --header-offset: 122px;
  --header-top-bg: #0A1F3F;
  --nav-bg: #113B7A;
  --nav-link-color: #F3F8FF;
  --nav-link-hover-bg: #1D5FD1;
  --primary-color: #113B7A;
  --secondary-color: #1D5FD1;
  --btn-primary-bg: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --btn-login-bg: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --btn-register-bg: linear-gradient(180deg, #F2C14E 0%, #D49A2E 100%);
  --text-main-color: #F3F8FF;
  --text-secondary-color: #AFC4E8;
  --border-color: #244D84;
  --card-bg: #10233F;
}

body {
  padding-top: var(--header-offset);
  background-color: #08162B;
  color: var(--text-main-color);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  min-height: auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  background-color: var(--header-top-bg);
}

.header-top {
  width: 100%;
  background-color: var(--header-top-bg);
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  min-height: 48px;
}

.logo {
  display: inline-block;
  font-size: 28px;
  font-weight: 800;
  color: #F3F8FF;
  text-decoration: none;
  letter-spacing: 1px;
  line-height: 1.2;
  background: linear-gradient(135deg, #F2C14E, #FFD700);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 10px rgba(242, 193, 78, 0.3);
  white-space: nowrap;
}

.desktop-nav-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
  border: none;
  color: #FFFFFF;
  line-height: 1.3;
}

.btn-login {
  background: var(--btn-login-bg);
  box-shadow: 0 2px 8px rgba(43, 115, 246, 0.4);
}

.btn-login:hover {
  background: linear-gradient(180deg, #3B83F6 0%, #1A4A9C 100%);
  box-shadow: 0 4px 12px rgba(43, 115, 246, 0.6);
  transform: translateY(-2px);
}

.btn-register {
  background: var(--btn-register-bg);
  box-shadow: 0 2px 8px rgba(242, 193, 78, 0.4);
}

.btn-register:hover {
  background: linear-gradient(180deg, #FFD25E 0%, #C78A1E 100%);
  box-shadow: 0 4px 12px rgba(242, 193, 78, 0.6);
  transform: translateY(-2px);
}

.main-nav {
  width: 100%;
  background-color: var(--nav-bg);
  display: flex;
  align-items: center;
  min-height: 52px;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 0 20px;
  flex-wrap: nowrap;
}

.nav-link {
  display: inline-block;
  padding: 10px 18px;
  color: var(--nav-link-color);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  line-height: 1.3;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
  white-space: nowrap;
}

.nav-link:first-child {
  border-left: none;
}

.nav-link:hover {
  background-color: var(--nav-link-hover-bg);
  color: #FFFFFF;
}

.mobile-nav-buttons {
  display: none;
}

.hamburger-menu {
  display: none;
}

@media (max-width: 768px) {
  :root {
    --header-offset: 110px;
  }

  .site-header {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
  }

  .header-top {
    min-height: 60px;
  }

  .header-container {
    width: 100%;
    max-width: none;
    padding: 8px 10px;
    min-height: 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
  }

  .logo {
    flex: 1;
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.5px;
  }

  .desktop-nav-buttons {
    display: none;
  }

  .main-nav {
    background-color: var(--nav-bg);
    width: 100%;
    min-height: auto;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding: 0;
  }

  .nav-container {
    width: 100%;
    max-width: none;
    padding: 0;
    min-height: 48px;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .nav-link {
    text-align: center;
    justify-content: center;
    align-items: center;
    flex-shrink: 1;
  }

  .mobile-nav-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
  }

  .hamburger-menu {
    display: none;
  }

  .mobile-menu-overlay {
    display: none;
  }

  .main-nav.active {
    display: block;
    transform: translateX(0);
  }

  .mobile-nav-buttons {
    display: flex;
  }
}

.page-content img {
  max-width: 100% !important;
  height: auto !important;
  display: block;
}

.page-content {
  overflow-x: hidden;
  max-width: 100%;
}

.site-footer {
  background-color: #08162B;
  border-top: 3px solid var(--border-color);
  padding: 0;
  width: 100%;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 50px 24px 30px 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.footer-logo {
  display: inline-block;
  font-size: 30px;
  font-weight: 800;
  color: #F3F8FF;
  text-decoration: none;
  letter-spacing: 1px;
}

.footer-description {
  color: var(--text-secondary-color);
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}

.footer-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  background-color: var(--card-bg);
  color: var(--text-main-color);
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border-color);
}

.footer-nav-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-nav-title {
  color: #F3F8FF;
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 6px 0;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-color);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-link {
  color: var(--text-secondary-color);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.3s ease;
  line-height: 1.6;
  padding: 2px 0;
}

.footer-nav-link:hover {
  color: #F2C14E;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-text {
  color: var(--text-secondary-color);
  font-size: 14px;
  line-height: 1.8;
}

.btn-contact {
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  align-self: flex-start;
  padding: 10px 24px;
  border-radius: 6px;
}

.btn-contact:hover {
  background: linear-gradient(180deg, #3B73F6 0%, #1144A6 100%);
  box-shadow: 0 4px 12px rgba(43, 115, 246, 0.4);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  text-align: center;
}

.copyright {
  color: var(--text-secondary-color);
  font-size: 14px;
  max-width: 1200px;
  margin: 0 auto;
  font-weight: 400;
  letter-spacing: 0.3px;
}

@media (max-width: 768px) {
  .site-header {
    min-height: auto;
  }

  body {
    padding-top: var(--header-offset);
  }

  .main-nav {
    display: block;
    width: 100%;
    min-height: auto;
    background-color: var(--nav-bg);
  }

  .nav-container {
    flex-direction: column;
    min-height: auto;
    gap: 0;
    width: 100%;
    padding: 0;
    flex-wrap: wrap;
  }

  .nav-link {
    width: 100%;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    border-right: none;
    text-align: left;
  }

  .mobile-nav-buttons {
    display: flex;
    width: 100%;
    flex-direction: row;
    justify-content: center;
    gap: 10px;
    padding: 10px 16px;
    background-color: #0A1F3F;
    border-top: 1px solid var(--border-color);
  }

  .btn {
    flex: 1;
    max-width: 160px;
    padding: 10px 12px;
    font-size: 14px;
    text-align: center;
  }

  .hamburger-menu {
    display: none;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 40px 20px 20px 20px;
  }

  .footer-bottom {
    padding: 14px 16px;
    margin-top: 10px;
  }

  .footer-description {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .footer-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .btn {
    font-size: 13px;
    padding: 8px 10px;
  }

  .btn-contact {
    font-size: 14px;
  }
}
/* 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;
}