:root {
  --header-offset: 122px;
  --primary-color: #017439;
  --secondary-color: #FFFFFF;
  --btn-register-bg: #C30808;
  --btn-login-bg: #C30808;
  --btn-text-color: #FFFF00;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

/* Header Styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  background-color: #FFFFFF;
}

.header-top {
  background-color: #0a4a2c;
  width: 100%;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  min-height: 68px;
}

.logo {
  font-size: 2rem;
  font-weight: 800;
  text-decoration: none;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 2px;
  background: linear-gradient(45deg, #FFFFFF 30%, #FFD700 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

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

.btn {
  display: inline-block;
  padding: 10px 24px;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-login {
  background-color: var(--btn-login-bg);
  color: var(--btn-text-color);
  border: 2px solid #a00505;
}

.btn-register {
  background-color: var(--btn-register-bg);
  color: var(--btn-text-color);
  border: 2px solid #a00505;
}

.btn-download {
  background-color: var(--primary-color);
  color: #FFFF00;
  border: 2px solid #005c2d;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  opacity: 0.9;
}

.main-nav {
  background-color: #017439;
  width: 100%;
  display: flex;
  border-top: 3px solid #00a34e;
  border-bottom: 1px solid #00a34e;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  padding: 5px 20px;
  min-height: 52px;
  gap: 5px;
}

.nav-container a {
  color: #FFFFFF;
  text-decoration: none;
  padding: 8px 12px;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: background-color 0.3s, color 0.3s;
  font-weight: 500;
}

.nav-container a:hover {
  background-color: #00a34e;
  color: #FFFFFF;
}

.hamburger-menu {
  display: none;
}

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

/* Mobile Styles */
@media (max-width: 768px) {
  :root {
    --header-offset: 146px;
  }

  .header-container {
    width: 100%;
    max-width: none;
    padding-left: 15px;
    padding-right: 15px;
    min-height: 60px;
  }

  .site-header {
    min-height: 144px;
  }

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

  .logo {
    flex: 1;
    text-align: center;
    font-size: 1.8rem;
  }

  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1002;
    gap: 5px;
    order: -1;
  }

  .hamburger-menu span {
    display: block;
    width: 24px;
    height: 3px;
    background-color: #FFFFFF;
    border-radius: 3px;
    transition: all 0.3s ease;
  }

  .hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
  }

  .main-nav {
    display: none;
    position: fixed;
    width: 260px;
    height: 100vh;
    top: 0;
    left: 0;
    background-color: #017439;
    z-index: 1001;
    flex-direction: column;
    align-items: flex-start;
    padding-top: 70px;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

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

  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    padding: 10px;
    width: 100%;
    gap: 0;
    max-width: 100%;
  }

  .nav-container a {
    display: block;
    width: 100%;
    padding: 12px 20px;
    font-size: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .mobile-nav-buttons {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background-color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 8px 15px;
    gap: 8px;
    z-index: 1000;
    border-bottom: 2px solid #017439;
    min-height: 48px;
  }

  .mobile-nav-buttons .btn {
    flex: 1;
    text-align: center;
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  .mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

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

  body.no-scroll {
    overflow: hidden;
  }

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

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

  body {
    overflow-x: hidden;
  }
}

/* Footer Styles */
.site-footer {
  background-color: #013a1d;
  color: #FFFFFF;
  padding: 50px 20px 0;
  margin-top: 50px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  padding-bottom: 30px;
}

.footer-column {
  flex: 1;
  min-width: 200px;
}

.footer-brand {
  flex: 2;
}

.footer-logo {
  font-size: 2rem;
  font-weight: bold;
  color: #FFFFFF;
  display: inline-block;
  margin-bottom: 15px;
  text-decoration: none;
  background: none;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: #FFFFFF;
}

.footer-brand p {
  color: #B8D8C2;
  line-height: 1.6;
  font-size: 0.9rem;
}

.footer-column h4 {
  font-size: 1rem;
  margin-bottom: 15px;
  color: #FFD700;
}

.footer-nav a {
  display: block;
  color: #B8D8C2;
  text-decoration: none;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: color 0.3s;
}

.footer-nav a:hover {
  color: #FFD700;
}

.footer-contact a {
  display: block;
  color: #B8D8C2;
  text-decoration: none;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: color 0.3s;
}

.footer-contact a:hover {
  color: #FFD700;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 15px 0;
  text-align: center;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .footer-container {
    flex-direction: column;
    gap: 25px;
  }

  .footer-column {
    min-width: 100%;
  }
  .footer-nav a {
    padding: 8px 0;
  }

  .footer-contact a {
    padding: 8px 0;
  }
}

.footer-nav a {
  text-decoration: none;
}
/* 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;
}