:root {
  --primary: #11A84E;
  --primary-secondary: #22C768;
  --bg-dark: #08160F;
  --text-main: #F2FFF6;
  --text-secondary: #A7D9B8;
  --border-color: #2E7A4E;
  --glow: #57E38D;
  --gold: #F2C14E;
  --divider: #1E3A2A;
  --deep-green: #0A4B2C;
  --header-top-bg: #0A4B2C;
  --header-nav-bg: #11271B;
  --card-bg: #11271B;
  --btn-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --header-offset: 122px;
  --header-menu-offset: 122px;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-dark);
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  border-bottom: 2px solid var(--border-color);
  font-family: 'Arial', sans-serif;
}

body {
  padding-top: var(--header-offset);
  background: var(--bg-dark);
  color: var(--text-main);
}

/* ===== Header Top Bar ===== */
.header-top {
  background: linear-gradient(135deg, var(--deep-green), #0A6B36);
  color: #fff;
  min-height: 68px;
  display: flex;
  align-items: center;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--gold);
  text-decoration: none;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-shadow: 0 0 10px rgba(242,193,78,0.3);
  display: inline-block;
  padding: 10px 0;
}

.logo:hover {
  color: #ffd700;
}

.desktop-nav-buttons {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  line-height: 1;
  letter-spacing: 0.5px;
  background: var(--btn-gradient);
  color: #08160F;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(87, 227, 141, 0.4);
}

.btn-register {
  background: var(--btn-gradient);
}

.btn-download {
  background: linear-gradient(180deg, #F2C14E 0%, #D49A23 100%);
}

.btn-download:hover {
  box-shadow: 0 6px 15px rgba(242,193,78,0.5);
}

/* ===== Main Navigation Bar ===== */
.main-nav {
  background: linear-gradient(90deg, #11271B, #0A4B2C);
  width: 100%;
  min-height: 52px;
  display: flex;
  align-items: center;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
}

.nav-list li a {
  display: block;
  padding: 12px 18px;
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.3s ease;
  border-radius: 30px;
}

.nav-list li a:hover,
.nav-list li a.active {
  background: var(--btn-gradient);
  color: #08160F;
  box-shadow: 0 0 10px rgba(87,227,141,0.5);
}

/* ===== Mobile Nav Buttons (hidden on desktop) ===== */
.mobile-nav-buttons {
  display: none;
}

/* ===== Hamburger Menu (hidden on desktop) ===== */
.hamburger-menu {
  display: none;
}

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

/* ===== Footer Styles ===== */
.site-footer {
  background: var(--bg-dark);
  border-top: 2px solid var(--border-color);
  padding: 50px 20px 30px;
  color: var(--text-main);
  font-family: 'Arial', sans-serif;
}

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

.footer-column h3 {
  color: var(--gold);
  font-size: 1.2rem;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 10px;
}

.footer-column p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 15px;
}

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

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.footer-nav a:hover {
  color: var(--glow);
  padding-left: 5px;
}

.footer-contact .footer-hotline {
  font-size: 1.1rem;
  color: var(--gold);
  font-weight: bold;
  margin-top: 10px;
}

.footer-note {
  margin-top: 20px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

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

  .header-container {
    width: 100%;
    max-width: none;
    padding: 0 15px;
  }

  .logo {
    font-size: 1.3rem;
    padding: 8px 0;
  }

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

  /* Mobile buttons - visible below logo */
  .mobile-nav-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    background: var(--bg-dark);
    padding: 10px 15px;
    min-height: 48px;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  }

  .mobile-nav-buttons .btn {
    font-size: 0.8rem;
    padding: 8px 16px;
  }

  /* Navigation hidden by default */
  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    flex-direction: column;
    width: 300px;
    max-width: 80%;
    height: 100vh;
    background: var(--deep-green);
    padding-top: 80px;
    align-items: flex-start;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    display: none; /* hidden initially */
    box-shadow: 2px 0 10px rgba(0,0,0,0.7);
    overflow-y: scroll;
  }

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

  .nav-container {
    width: 100%;
    max-width: none;
    padding: 0;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    align-items: flex-start;
    padding: 0;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    display: block;
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    border-radius: 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
  }

  .nav-list li a:hover,
  .nav-list li a.active {
    background: var(--btn-gradient);
    color: #08160F;
  }

  /* Hamburger menu - visible */
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    cursor: pointer;
    position: absolute;
    top: 20px;
    left: 15px;
    z-index: 1002;
  }

  .hamburger-menu span {
    background: var(--text-main);
    height: 3px;
    border-radius: 2px;
    transition: all 0.3s ease;
  }

  .hamburger-menu.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
  }

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

  .hamburger-menu.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
  }

  /* Overlay */
  .mobile-menu-overlay {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
  }

  .mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* Content protection */
  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 stack columns */
  .footer-container {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 0;
  }
}
/* 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;
}