:root {
  --primary: #113B7A;
  --primary-dark: #08162B;
  --secondary: #1D5FD1;
  --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --header-offset: 122px;
  --text-main: #F3F8FF;
  --text-secondary: #AFC4E8;
  --gold: #F2C14E;
  --border-color: #244D84;
  --divider-color: #1B3357;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: #ffffff;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.25);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

.header-top {
  background: var(--primary-dark);
  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 {
  display: inline-block;
  color: var(--gold);
  font-size: 28px;
  font-weight: 800;
  text-decoration: none;
  text-transform: lowercase;
  letter-spacing: 1px;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--gold) 0%, #FFF2C8 60%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.btn {
  display: inline-block;
  padding: 10px 28px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.btn-register {
  background: var(--button-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(22, 78, 196, 0.35);
}

.btn-register:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(22, 78, 196, 0.5);
}

.btn-login {
  background: linear-gradient(180deg, #F2C14E 0%, #D4A02A 100%);
  color: #08162B;
  box-shadow: 0 4px 12px rgba(242, 193, 78, 0.3);
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(242, 193, 78, 0.45);
}

.main-nav {
  background: var(--primary);
  width: 100%;
  display: flex;
  flex-direction: row;
  position: static;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  padding: 12px 20px;
  gap: 6px;
  width: 100%;
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-menu li {
  position: relative;
}

.nav-menu li a {
  display: block;
  color: var(--text-main);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 20px;
  transition: all 0.3s ease;
  white-space: nowrap;
  background: transparent;
  border: 1px solid transparent;
  letter-spacing: 0.3px;
}

.nav-menu li a:hover {
  background: rgba(75, 143, 255, 0.2);
  border-color: var(--border-color);
  color: #ffffff;
  box-shadow: 0 0 10px rgba(79, 168, 255, 0.15);
}

.nav-menu li a.active {
  background: rgba(75, 143, 255, 0.3);
  border-color: #4FA8FF;
  color: #ffffff;
}

.hamburger-menu {
  display: none;
}

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

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

.site-footer {
  background: var(--primary-dark);
  color: var(--text-main);
  padding: 50px 0 0;
  margin-top: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 35px;
}

.footer-brand {
  padding-right: 40px;
}

.footer-logo {
  color: var(--gold);
  font-size: 30px;
  font-weight: 800;
  text-decoration: none;
  text-transform: lowercase;
  margin-bottom: 18px;
  display: inline-block;
  letter-spacing: 1px;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-hotline {
  color: var(--gold);
  font-size: 16px;
  font-weight: 700;
  border-bottom: 1px solid var(--gold);
  display: inline-block;
  padding-bottom: 3px;
}

.footer-heading {
  color: #ffffff;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 22px;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding-bottom: 8px;
  position: relative;
}

.footer-heading::after {
  content: '';
  display: block;
  width: 35px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
  margin-top: 10px;
}

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li {
  margin-bottom: 12px;
}

.footer-nav li a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.3s ease;
  display: inline-block;
  padding: 3px 0;
}

.footer-nav li a:hover {
  color: var(--gold);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--divider-color);
  padding: 25px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  color: var(--text-secondary);
  font-size: 13px;
  background: rgba(4, 12, 24, 0.4);
  border-radius: 8px 8px 0 0;
}

.footer-bottom p {
  margin: 0;
  color: var(--text-secondary);
}

.footer-address {
  color: var(--text-secondary);
}

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

  .header-container {
    width: 100%;
    max-width: none;
    padding-left: 15px;
    padding-right: 15px;
    min-height: 60px;
    position: relative;
    justify-content: space-between;
  }

  .nav-container {
    width: 100%;
    max-width: none;
    padding-left: 15px;
    padding-right: 15px;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

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

  .logo {
    font-size: 24px;
    margin-left: auto;
    margin-right: auto;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    order: 1;
  }

  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 2px solid var(--gold);
    border-radius: 8px;
    cursor: pointer;
    z-index: 1001;
    gap: 5px;
    padding: 0;
    order: 2;
  }

  .hamburger-menu span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--gold);
    border-radius: 2px;
    transition: all 0.3s ease;
  }

  .hamburger-menu.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger-menu.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .main-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    width: 85%;
    height: auto;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    background: var(--primary);
    flex-direction: column;
    z-index: 1000;
    border-radius: 0 0 12px 0;
    box-shadow: 4px 8px 24px rgba(0, 0, 0, 0.35);
    padding: 15px 0;
    transform: translateX(-100%);
    transition: transform 0.35s ease-out;
    border-right: 3px solid var(--gold);
  }

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

  .nav-menu {
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding: 10px 0;
  }

  .nav-menu li {
    width: 100%;
    text-align: center;
  }

  .nav-menu li a {
    font-size: 16px;
    padding: 14px 16px;
    display: block;
    border-bottom: 1px solid rgba(27, 51, 87, 0.6);
    border-radius: 0;
    color: var(--text-main);
    transition: all 0.25s;
  }

  .nav-menu li:last-child a {
    border-bottom: none;
  }

  .nav-menu li a:hover {
    background: rgba(29, 95, 209, 0.35);
    padding-left: 20px;
    border-color: transparent;
  }

  .mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.55);
    z-index: 998;
    backdrop-filter: blur(2px);
  }

  .mobile-menu-overlay.active {
    display: block;
  }

  .mobile-nav-buttons {
    display: flex;
    gap: 10px;
    padding: 10px 0 15px;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
    border-bottom: 1px solid rgba(27, 51, 87, 0.4);
  }

  .mobile-nav-buttons .btn {
    padding: 12px 35px;
    font-size: 15px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-bottom: 25px;
  }

  .footer-brand {
    padding-right: 0;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
    gap: 8px;
    padding-bottom: 15px;
    border-radius: 0;
  }

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

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

  body {
    overflow-x: hidden;
  }
}

@media(max-width:480px) {
  .main-nav {
    top: 55px;
    max-height: calc(100vh - 110px);
  }

  .btn-login {
    display: none;
  }

  .mobile-nav-buttons .btn {
    padding: 10px 24px;
    font-size: 13px;
  }

  .footer-grid {
    padding-left: 15px;
    padding-right: 15px;
  }
}
/* 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;
}