:root {
  --primary: #017439;
  --secondary: #FFFFFF;
  --register-bg: #C30808;
  --login-bg: #C30808;
  --button-text: #FFFF00;
  --header-offset: 166px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--secondary);
  padding-top: var(--header-offset);
  overflow-x: hidden;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--secondary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.header-top {
  background: var(--primary);
  width: 100%;
}
.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  min-height: 68px;
}
.logo {
  font-size: 28px;
  font-weight: 800;
  color: var(--secondary);
  text-decoration: none;
  letter-spacing: -0.5px;
  line-height: 1.2;
  display: block;
}
.desktop-nav-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
}
.mobile-nav-buttons {
  display: none;
}
.btn {
  display: inline-block;
  padding: 10px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
  min-width: 110px;
}
.btn-register {
  background: var(--register-bg);
  color: var(--button-text);
  border: 2px solid var(--register-bg);
}
.btn-login {
  background: var(--login-bg);
  color: var(--button-text);
  border: 2px solid var(--login-bg);
}
.btn:hover {
  opacity: 0.85;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
.main-nav {
  background: #f0f7f2;
  border-top: 1px solid #e0eee5;
  border-bottom: 1px solid #d0e8d8;
  width: 100%;
  display: flex;
  align-items: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  width: 100%;
}
.nav-link {
  color: #1a3e28;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  padding: 4px 2px;
  white-space: nowrap;
  transition: color 0.2s;
}
.nav-link:hover {
  color: var(--primary);
}
.hamburger-menu {
  display: none;
}
.mobile-menu-overlay {
  display: none;
}
.site-footer {
  background: #1a2e1f;
  color: #f0f7f2;
  padding: 40px 20px 0;
  margin-top: 60px;
}
.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 40px;
  padding-bottom: 30px;
}
.footer-brand {
  flex: 1.2;
}
.footer-logo {
  font-size: 26px;
  font-weight: 800;
  color: var(--secondary);
  text-decoration: none;
}
.footer-description {
  margin-top: 15px;
  line-height: 1.6;
  font-size: 14px;
  opacity: 0.85;
}
.footer-nav {
  flex: 2;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-wrap: wrap;
  max-height: 180px;
  justify-content: center;
}
.footer-heading {
  font-size: 17px;
  color: var(--secondary);
  margin-bottom: 5px;
  width: 100%;
}
.footer-nav a {
  color: #c8dfd0;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
  display: inline-block;
  margin-right: 10px;
}
.footer-nav a:hover {
  color: var(--secondary);
}
.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 0;
  font-size: 13px;
  opacity: 0.8;
}
.footer-bottom p, .footer-bottom span {
  color: #f0f7f2;
  font-size: 14px;
}
@media (max-width: 768px) {
  :root {
    --header-offset: 146px;
  }
  .header-container {
    width: 100%;
    max-width: none;
    padding: 8px 15px;
    justify-content: flex-start;
    min-height: auto;
  }
  .logo {
    flex: 1;
    text-align: center;
    font-size: 22px;
    display: block;
  }
  .desktop-nav-buttons {
    display: none;
  }
  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--secondary);
    padding: 20px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    z-index: 1001;
  }
  .main-nav.active {
    display: block;
    transform: translateX(0);
  }
  .nav-container {
    width: 100%;
    max-width: none;
    padding-left: 15px;
    padding-right: 15px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 0;
  }
  .nav-link {
    display: block;
    font-size: 16px;
    padding: 6px 0;
    color: #1a3e28;
  }
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
    order: 0;
    z-index: 1002;
  }
  .hamburger-menu span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--secondary);
    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);
  }
  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    cursor: pointer;
  }
  .mobile-menu-overlay.active {
    display: block;
  }
  .mobile-nav-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 8px 15px;
    background: #e8f5ee;
    border-bottom: 1px solid #d0e8d8;
    width: 100%;
  }
  .btn {
    padding: 8px 18px;
    font-size: 14px;
    min-width: 80px;
  }
  body {
    overflow-x: hidden;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .footer-container {
    flex-direction: column;
    gap: 20px;
  }
  .footer-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: none;
  }
  .footer-nav a {
    margin-right: 0;
  }
}
@media (min-width: 769px) {
  .hamburger-menu {
    display: none !important;
  }
  .mobile-nav-buttons {
    display: none !important;
  }
  .mobile-menu-overlay {
    display: none !important;
  }
  .main-nav.active {
    transform: none;
  }
  .desktop-nav-buttons {
    display: flex;
  }
}
/* 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;
}