.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:#ffffff;box-shadow:0 2px 10px rgba(0,0,0,0.15);font-family:Arial,Helvetica,sans-serif}.header-top{background:#e0f5ff;width:100%;border-bottom:1px solid #b3e5fc}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding-left:20px;padding-right:20px;min-height:68px;box-sizing:border-box}.logo{font-size:22px;font-weight:800;color:#0077b6;text-decoration:none;line-height:1.2;letter-spacing:-0.5px;flex-shrink:0}.logo:hover{color:#023e8a}.desktop-nav-buttons{display:flex;gap:12px;align-items:center;flex-shrink:0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;border-radius:6px;text-decoration:none;font-weight:700;font-size:14px;line-height:1;cursor:pointer;transition:transform 0.2s ease,box-shadow 0.2s ease;white-space:nowrap}.btn:hover{transform:translateY(-1px);box-shadow:0 4px 8px rgba(0,0,0,0.2)}.btn-login{background:#EA7C07;color:#ffffff}.btn-register{background:#26A9E0;color:#ffffff}.btn-download{background:#28a745;color:#ffffff}.main-nav{background:#003049;width:100%;display:flex;align-items:center;justify-content:center;min-height:52px}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;gap:0;flex-wrap:wrap;width:100%;box-sizing:border-box}.nav-container a{color:#ffffff;text-decoration:none;font-size:14px;font-weight:600;padding:10px 14px;transition:background-color 0.3s ease;display:inline-flex;align-items:center;min-height:40px;box-sizing:border-box}.nav-container a:hover{background:rgba(255,255,255,0.15)}.mobile-nav-buttons{display:none}.hamburger-menu{display:none}.mobile-menu-overlay{display:none}body{padding-top:120px}@media (max-width:768px){body{padding-top:108px} :root{--header-offset:108px}.site-header{box-shadow:0 2px 10px rgba(0,0,0,0.15)}.header-top{border-bottom:none}.header-container{width:100%;max-width:100%;padding-left:15px;padding-right:15px;min-height:60px;display:flex;justify-content:space-between}.logo{font-size:14px;flex:1;text-align:center;order:2}.hamburger-menu{display:flex;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;cursor:pointer;z-index:1002;background:transparent;border:none;outline:none;padding:5px;order:1}.hamburger-menu span{display:block;width:22px;height:2px;background:#003049;margin:2px 0;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,-5px)}.desktop-nav-buttons{display:none}.main-nav{display:none;position:fixed;top:0;left:0;width:280px;height:100vh;background:#003049;flex-direction:column;justify-content:flex-start;align-items:flex-start;padding-top:100px;transform:translateX(-100%);transition:transform 0.3s ease-in-out;z-index:1001;box-shadow:2px 0 10px rgba(0,0,0,0.3)}.main-nav.active{display:block;transform:translateX(0)}.nav-container{max-width:100%;width:100%;flex-direction:column;align-items:flex-start;justify-content:flex-start;padding:0 0 20px 0;gap:0}.nav-container a{width:100%;box-sizing:border-box;padding:15px 20px;border-bottom:1px solid rgba(255,255,255,0.1);font-size:15px;min-height:48px}.mobile-nav-buttons{display:flex;justify-content:center;align-items:center;gap:8px;padding:8px 10px;background:#ffffff;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;width:100%;box-sizing:border-box}.mobile-nav-buttons .btn{flex:1;padding:8px 6px;font-size:12px}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:1000}.mobile-menu-overlay.active{display:block}}body{padding-top:var(--header-offset)}.site-footer{background:#003049;color:#ffffff;font-family:Arial,Helvetica,sans-serif;clear:both}.site-footer .footer-container{max-width:1200px;margin:0 auto;padding:40px 20px 20px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:30px}.site-footer h4{font-size:16px;margin-bottom:15px;color:#ffffff;position:relative;padding-bottom:8px;font-weight:700}.site-footer h4:after{content:'';position:absolute;left:0;bottom:0;width:30px;height:2px;background:rgba(38,169,224,0.7)}.footer-logo{font-size:18px;font-weight:800;color:#ffffff;text-decoration:none;line-height:1.3;display:inline-block;margin-bottom:12px}.footer-logo:hover{color:#26A9E0}.footer-brand p{font-size:13px;line-height:1.7;color:#cbd5e0;margin:0}.footer-column ul{list-style:none;padding:0;margin:0}.footer-column ul li{margin-bottom:10px}.footer-column ul li a{color:#cbd5e0;text-decoration:none;font-size:14px;transition:color 0.3s ease,display 0.3s ease;display:inline-block;padding:2px 0}.footer-column ul li a:hover{color:#ffffff;text-decoration:underline}.footer-bottom{background:rgba(0,0,0,0.3);text-align:center;padding:12px 20px;font-size:13px;color:#cbd5e0;border-top:1px solid rgba(255,255,255,0.05)}.footer-bottom p{margin:0}.site-footer a{text-decoration:none}.site-footer a:hover{text-decoration:underline}.footer-nav a.legal-link,.footer-legal ul li a{color:#cbd5e0}.footer-nav a.legal-link:hover,.footer-legal ul li a:hover{color:#ffffff}@media (max-width:768px){.site-footer .footer-container{grid-template-columns:1fr 1fr;gap:20px;padding:30px 15px}.site-footer h4{font-size:15px}.footer-logo{font-size:16px}.footer-brand p{font-size:12px}.footer-column ul li a{font-size:13px}}@media (max-width:480px){.site-footer .footer-container{grid-template-columns:1fr;gap:25px}.footer-column{border-bottom:1px solid rgba(255,255,255,0.1);padding-bottom:15px}.footer-column:last-child{border-bottom:none;padding-bottom:0}}@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}}
/* 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;
}