html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; color: #333; background-color: #FFFFFF; padding-top: var(--header-offset); }
:root { --primary-color: #017439; --secondary-color: #FFFFFF; --button-bg-color: #C30808; --button-text-color: #FFFF00; --header-offset: 122px; }

/* --- Site Header --- */
.site-header { position: fixed; top: 0; left: 0; right: 0; width: 100%; z-index: 1000; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); background-color: var(--secondary-color); }

/* Header Top Bar */
.header-top { box-sizing: border-box; min-height: 68px; height: 68px; display: flex; align-items: center; overflow: hidden; background-color: var(--primary-color); width: 100%; padding: 0 20px; }
.header-container { box-sizing: border-box; width: 100%; height: 100%; max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }

.logo { color: var(--secondary-color); font-size: 28px; font-weight: bold; text-decoration: none; white-space: nowrap; }
.logo img { display: block; max-height: 60px; height: auto; width: auto; max-width: 280px; object-fit: contain; }

.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.mobile-nav-buttons { box-sizing: border-box; display: none; min-height: 48px; width: 100%; background-color: var(--primary-color); padding: 0 15px; }

/* Main Navigation Bar */
.main-nav { box-sizing: border-box; min-height: 52px; height: 52px; display: flex; align-items: center; overflow: hidden; background-color: #005a2e; /* Darker primary for contrast */ width: 100%; }
.nav-container { box-sizing: border-box; height: 100%; max-width: 1200px; margin: 0 auto; display: flex; flex-direction: row; justify-content: center; align-items: center; padding: 0 20px; }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 25px; }
.main-nav ul li a { color: var(--secondary-color); text-decoration: none; font-size: 16px; font-weight: bold; padding: 10px 0; display: block; white-space: nowrap; }
.main-nav ul li a:hover { color: #FFD700; /* Gold-like hover color */ }

/* Hamburger Menu (Desktop - Hidden) */
.hamburger-menu { display: none; background: none; border: none; cursor: pointer; padding: 0; width: 30px; height: 24px; position: relative; z-index: 1002; }
.hamburger-menu span { display: block; width: 100%; height: 3px; background-color: var(--secondary-color); margin-bottom: 5px; transition: all 0.3s ease; border-radius: 2px; }
.hamburger-menu span:last-child { margin-bottom: 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border-radius: 5px; text-decoration: none; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; white-space: nowrap; border: none; }
.btn-register { background-color: var(--button-bg-color); color: var(--button-text-color); }
.btn-login { background-color: var(--button-bg-color); color: var(--button-text-color); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); }

/* Overlay for mobile menu */
.overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); z-index: 999; }

/* --- Site Footer --- */
.site-footer { background-color: #1a1a1a; color: #cccccc; padding: 40px 20px 20px; font-size: 14px; line-height: 1.6; }
.footer-top-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto 30px; }
.footer-col h3 { color: var(--secondary-color); font-size: 18px; margin-bottom: 15px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: #cccccc; text-decoration: none; }
.footer-col ul li a:hover { color: var(--primary-color); }
.footer-logo { display: inline-block; color: var(--secondary-color); font-size: 24px; font-weight: bold; text-decoration: none; margin-bottom: 15px; }
.footer-description { margin-top: 0; word-wrap: break-word; overflow-wrap: break-word; }

.footer-middle-dynamic-area { max-width: 1200px; margin: 0 auto 20px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.footer-mid-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.footer-slot-anchor-outer, .footer-slot-anchor-inner { min-height: 1px; }

.footer-bottom { text-align: center; border-top: 1px solid #333; padding-top: 20px; margin-top: 20px; max-width: 1200px; margin-left: auto; margin-right: auto; }
.footer-bottom p { margin: 0; color: #999999; }

/* Mobile Specific Styles */
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { overflow-x: hidden; }
  .page-content img { max-width: 100% !important; height: auto !important; display: block; }
  .page-content { overflow-x: hidden; max-width: 100%; }

  .site-header { box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); }

  .header-top { min-height: 60px !important; height: 60px !important; padding: 0 15px; }
  .header-container { width: 100%; max-width: none; justify-content: space-between; position: relative; /* For logo absolute positioning */ }
  .logo {
    flex: 1 !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    max-width: calc(100% - 100px); /* Adjust based on hamburger/button width */
  }
  .logo img { max-height: 56px !important; width: auto; height: auto; }

  .desktop-nav-buttons { display: none !important; }
  .mobile-nav-buttons {
    display: flex !important;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    width: 100%; max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
    overflow: hidden;
    gap: 10px;
    flex-wrap: nowrap;
    background-color: var(--primary-color);
  }
  .mobile-nav-buttons .btn {
    flex: 1; min-width: 0;
    max-width: calc(50% - 5px);
    box-sizing: border-box;
    padding: 8px 12px;
    font-size: 13px;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .main-nav {
    position: fixed; top: var(--header-offset); left: 0;
    width: 280px; /* Adjust width as needed */
    height: calc(100% - var(--header-offset));
    background-color: #005a2e; /* Same as desktop main-nav */
    transform: translateX(-100%);
    transition: transform 0.3s ease-out;
    display: none; /* Hidden by default for mobile */
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding-top: 20px;
    overflow-y: auto;
    box-shadow: 2px 0 5px rgba(0,0,0,0.2);
    z-index: 1001;
  }
  .main-nav.active { transform: translateX(0); display: flex; /* Display when active */ }
  .main-nav .nav-container { width: 100%; max-width: none; height: auto; flex-direction: column; justify-content: flex-start; align-items: flex-start; padding: 0; }
  .main-nav ul { flex-direction: column; width: 100%; gap: 0; }
  .main-nav ul li { width: 100%; }
  .main-nav ul li a { padding: 12px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); font-size: 15px; }
  .main-nav ul li:last-child a { border-bottom: none; }

  .hamburger-menu { display: block; position: absolute; left: 15px; top: 50%; transform: translateY(-50%); }
  .hamburger-menu.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .hamburger-menu.active span:nth-child(2) { opacity: 0; }
  .hamburger-menu.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

  .overlay.active { display: block; }
  body.no-scroll { overflow: hidden; }

  .footer-top-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-middle-dynamic-area { grid-template-columns: 1fr; gap: 30px; }
  .footer-mid-grid { grid-template-columns: 1fr; gap: 30px; }
}
/* 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;
}