:root { --header-offset: 122px; --primary-color: #E53935; --accent-color: #FF5A4F; --card-bg: #FFFFFF; --bg-color: #F5F7FA; --text-main: #333333; --border-color: #E0E0E0; }

html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Arial', sans-serif; line-height: 1.6; color: var(--text-main); background-color: var(--bg-color); padding-top: var(--header-offset); overflow-x: hidden; }
body.no-scroll { overflow: hidden; }

/* General container styles */
.header-container, .nav-container, .footer-top-grid { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; box-sizing: border-box; }

/* 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(--primary-color); }

.header-top { box-sizing: border-box; min-height: 68px; height: 68px; display: flex; align-items: center; overflow: hidden; background-color: var(--primary-color); color: var(--card-bg); }
.header-top .header-container { height: 100%; display: flex; justify-content: space-between; align-items: center; }

.logo, .footer-logo { font-size: 28px; font-weight: bold; text-decoration: none; color: var(--card-bg); display: block; padding: 0; }

.desktop-nav-buttons { display: flex; gap: 12px; align-items: center; }
.mobile-nav-buttons { box-sizing: border-box; display: none; min-height: 48px; background-color: var(--bg-color); /* Matches main-nav mobile bg */ padding: 0 20px; }

.btn { background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%); color: #FFFFFF; padding: 10px 20px; border-radius: 5px; text-decoration: none; font-weight: bold; transition: background-color 0.3s ease; white-space: nowrap; display: inline-block; border: none; cursor: pointer; }
.btn:hover { opacity: 0.9; }

.hamburger-menu { display: none; flex-direction: column; justify-content: space-around; width: 30px; height: 25px; cursor: pointer; background: transparent; border: none; padding: 0; z-index: 1001; }
.hamburger-menu .bar { width: 100%; height: 3px; background-color: var(--card-bg); transition: all 0.3s ease; border-radius: 2px; }
.hamburger-menu.active .bar:nth-child(1) { transform: translateY(11px) rotate(45deg); }
.hamburger-menu.active .bar:nth-child(2) { opacity: 0; }
.hamburger-menu.active .bar:nth-child(3) { transform: translateY(-11px) rotate(-45deg); }

.main-nav { box-sizing: border-box; min-height: 52px; height: 52px; display: flex; align-items: center; overflow: hidden; background-color: var(--bg-color); width: 100%; }
.main-nav .nav-container { height: 100%; display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 25px; }
.nav-link { color: var(--text-main); text-decoration: none; font-weight: bold; padding: 5px 0; transition: color 0.3s ease; white-space: nowrap; }
.nav-link:hover, .nav-link.active { color: var(--primary-color); }

.overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(0,0,0,0.5); z-index: 998; }

/* Footer */
.site-footer { background-color: var(--text-main); color: #FFFFFF; padding: 40px 0 20px; font-size: 14px; }
.footer-top-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; padding-bottom: 30px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-col h3 { color: var(--accent-color); font-size: 16px; margin-bottom: 15px; }
.footer-col p { line-height: 1.8; color: rgba(255,255,255,0.8); word-wrap: break-word; overflow-wrap: break-word; }
.footer-logo { font-size: 24px; margin-bottom: 15px; display: inline-block; color: var(--card-bg); text-decoration: none; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 8px; }
.footer-nav a { color: rgba(255,255,255,0.8); text-decoration: none; transition: color 0.3s ease; }
.footer-nav a:hover { color: var(--accent-color); }
.footer-bottom { text-align: center; padding-top: 20px; color: rgba(255,255,255,0.6); }
.footer-bottom a { color: rgba(255,255,255,0.6); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent-color); }

/* Dynamic slot anchors */
.footer-slot-anchor-inner { min-height: 1px; }

/* Media Queries for Mobile */
@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%; }

  .header-top { min-height: 60px !important; height: 60px !important; }
  .header-top .header-container { padding-left: 15px; padding-right: 15px; }
  .logo { flex: 1 !important; display: flex !important; justify-content: center !important; align-items: center !important; }
  .logo img { max-height: 56px !important; }

  .desktop-nav-buttons { display: none !important; }
  .mobile-nav-buttons { display: flex !important; min-height: 48px; align-items: center; width: 100%; max-width: 100%; box-sizing: border-box; padding-left: 15px; padding-right: 15px; overflow: hidden; gap: 10px; flex-wrap: nowrap; justify-content: center; background-color: var(--bg-color); /* Matches main-nav mobile bg */ }
  .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;
  }

  .hamburger-menu { display: flex; position: relative; z-index: 1001; margin-right: auto; /* Push logo to center */ }
  .header-top .header-container { justify-content: space-between; /* To keep hamburger left and logo centered */ }

  .main-nav { display: none; flex-direction: column; position: fixed; top: var(--header-offset); left: 0; width: 80%; max-width: 300px; height: calc(100% - var(--header-offset)); background-color: var(--card-bg); box-shadow: 2px 0 5px rgba(0,0,0,0.2); transform: translateX(-100%); transition: transform 0.3s ease; z-index: 999; overflow-y: auto; }
  .main-nav.active { display: flex; transform: translateX(0); }
  .main-nav .nav-container { flex-direction: column; align-items: flex-start; padding: 20px; width: 100%; gap: 15px; }
  .nav-link { width: 100%; padding: 10px 0; border-bottom: 1px solid var(--border-color); color: var(--text-main); }
  .nav-link:last-child { border-bottom: none; }
  .overlay.active { display: block; }

  .footer-top-grid { grid-template-columns: 1fr; gap: 20px; padding-left: 15px; padding-right: 15px; }
  .footer-col { text-align: center; }
  .footer-col h3 { margin-top: 20px; }
  .footer-nav { text-align: center; }
  .footer-description { text-align: center; }
  .footer-logo { margin: 0 auto 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;
}