:root { --header-offset: 122px; --primary-color: #26A9E0; --secondary-color: #FFFFFF; --login-color: #EA7C07; }
body { margin: 0; font-family: 'Arial', sans-serif; padding-top: var(--header-offset); color: #333333; overflow-x: hidden; }
a { text-decoration: none; color: var(--primary-color); }

/* Header Styles */
.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 { box-sizing: border-box; min-height: 68px; height: 68px; display: flex; align-items: center; overflow: hidden; background-color: var(--primary-color); width: 100%; }
.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; padding: 0 30px; }
.logo { font-size: 24px; font-weight: bold; color: var(--secondary-color); 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; background-color: var(--secondary-color); width: 100%; padding: 0 15px; }

.btn { display: inline-block; padding: 10px 18px; border-radius: 5px; font-weight: bold; text-align: center; white-space: nowrap; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; text-decoration: none; }
.btn-register { background-color: var(--primary-color); color: var(--secondary-color); border: 1px solid var(--primary-color); }
.btn-register:hover { background-color: #1A8EC2; transform: translateY(-1px); }
.btn-login { background-color: var(--login-color); color: var(--secondary-color); border: 1px solid var(--login-color); }
.btn-login:hover { background-color: #D46C06; transform: translateY(-1px); }

.hamburger-menu { display: none; width: 30px; height: 24px; position: relative; cursor: pointer; background: none; border: none; padding: 0; z-index: 1001; }
.hamburger-menu span { display: block; width: 100%; height: 3px; background-color: var(--secondary-color); border-radius: 2px; position: absolute; left: 0; transition: all 0.3s ease; }
.hamburger-menu span:nth-child(1) { top: 0; }
.hamburger-menu span:nth-child(2) { top: 10px; }
.hamburger-menu span:nth-child(3) { top: 20px; }
.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); }

.main-nav { box-sizing: border-box; min-height: 52px; height: 52px; display: flex; align-items: center; overflow: hidden; background-color: #000000; 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; }
.nav-link { color: var(--secondary-color); padding: 10px 15px; font-weight: bold; white-space: nowrap; transition: color 0.3s ease, background-color 0.3s ease; }
.nav-link:hover { color: var(--primary-color); background-color: rgba(255, 255, 255, 0.1); border-radius: 3px; }

.overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.5); z-index: 998; }
.overlay.active { display: block; }

/* Footer Styles */
.site-footer { background-color: #333333; color: var(--secondary-color); padding: 40px 0 20px; font-size: 14px; line-height: 1.6; }
.footer-slot-anchor-inner { min-height: 1px; }
.footer-top-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto; padding: 0 30px; border-bottom: 1px solid rgba(255, 255, 255, 0.1); padding-bottom: 30px; margin-bottom: 30px; }
.footer-col h3 { color: var(--primary-color); font-size: 16px; margin-bottom: 15px; }
.footer-logo { font-size: 20px; font-weight: bold; color: var(--secondary-color); display: block; margin-bottom: 15px; }
.footer-description { color: #CCCCCC; margin-bottom: 20px; word-wrap: break-word; overflow-wrap: break-word; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 8px; }
.footer-nav a { color: #CCCCCC; transition: color 0.3s ease; }
.footer-nav a:hover { color: var(--primary-color); }

.footer-mid-slots { max-width: 1200px; margin: 0 auto; padding: 0 30px; margin-bottom: 30px; }
.footer-mid-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 20px; }

.footer-bottom-nav { max-width: 1200px; margin: 0 auto; padding: 0 30px; border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 20px; margin-top: 20px; }
.footer-nav-legal { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 15px 30px; }
.footer-nav-legal a { color: #CCCCCC; transition: color 0.3s ease; white-space: nowrap; }
.footer-nav-legal a:hover { color: var(--primary-color); }

.footer-bottom { text-align: center; max-width: 1200px; margin: 20px auto 0; padding: 0 30px; color: #CCCCCC; }
.footer-bottom p { margin: 0; }

/* Responsive Styles */
@media (max-width: 768px) {
  :root { --header-offset: 110px; }
  body { padding-top: var(--header-offset); overflow-x: 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; }

  .header-top { min-height: 60px !important; height: 60px !important; }
  .header-container { width: 100%; max-width: none; padding: 0 15px; position: relative; }
  .logo { flex: 1 !important; display: flex !important; justify-content: center !important; align-items: center !important; font-size: 20px; }
  .logo img { max-height: 56px !important; max-width: 100%; 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;
  }
  .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; flex-direction: column; justify-content: space-between; position: absolute; left: 15px; top: 50%; transform: translateY(-50%); }
  .hamburger-menu.active span:nth-child(1) { background-color: var(--primary-color); }
  .hamburger-menu.active span:nth-child(3) { background-color: var(--primary-color); }

  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-offset);
    left: 0;
    width: 250px;
    height: calc(100% - var(--header-offset));
    background-color: var(--secondary-color);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    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;
    box-sizing: border-box;
    min-height: unset; height: unset;
  }
  .main-nav.active { display: flex; transform: translateX(0); }
  .nav-container { flex-direction: column; align-items: flex-start; padding: 0; width: 100%; height: auto; max-width: none; }
  .nav-link { color: #333333; width: 100%; padding: 12px 10px; border-bottom: 1px solid #eee; }
  .nav-link:last-child { border-bottom: none; }
  .nav-link:hover { background-color: #f5f5f5; }

  .overlay.active { display: block; }

  .footer-top-grid { grid-template-columns: 1fr; padding: 0 15px; }
  .footer-col { margin-bottom: 20px; }
  .footer-mid-row { grid-template-columns: 1fr; }
  .footer-bottom-nav { padding: 0 15px; }
  .footer-nav-legal { flex-direction: column; align-items: center; gap: 10px; }
  .footer-bottom { padding: 0 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;
  }
}