.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:#FFFFFF;box-shadow:0 2px 12px rgba(47,107,255,0.2);min-height:auto}.header-top{width:100%;background:linear-gradient(180deg,#1E4FCC 0%,#2F6BFF 100%);padding:0;border-bottom:2px solid #6FA3FF}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:10px 20px;box-sizing:border-box}.logo{display:inline-block;font-size:32px;font-weight:900;color:#FFFFFF;text-decoration:none;letter-spacing:2px;text-shadow:0 2px 4px rgba(0,0,0,0.3);line-height:1.2;font-family:'Arial Black',Arial,sans-serif}.logo:hover{opacity:0.9}.desktop-nav-buttons{display:flex;gap:10px;align-items:center}.btn{display:inline-block;text-decoration:none;border:none;cursor:pointer;font-size:15px;font-weight:700;line-height:1;transition:all 0.3s ease;text-align:center;box-sizing:border-box}.btn-register{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#FFFFFF;padding:10px 24px;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,0.2)}.btn-register:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(47,107,255,0.4)}.btn-login{background:linear-gradient(180deg,#FF9A3D 0%,#FF7A00 100%);color:#FFFFFF;padding:10px 24px;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,0.2)}.btn-login:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(255,122,0,0.4)}.btn-download{background:linear-gradient(180deg,#A5C4FF 0%,#6FA3FF 100%);color:#1F2D3D;padding:10px 20px;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,0.15)}.btn-download:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(111,163,255,0.4)}.main-nav{width:100%;background:#FFFFFF;display:flex;border-bottom:1px solid #D6E2FF}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;box-sizing:border-box;gap:0}.nav-link{display:block;color:#1F2D3D;text-decoration:none;font-size:16px;font-weight:600;padding:14px 18px;transition:all 0.3s ease;white-space:nowrap;border-bottom:3px solid transparent}.nav-link:hover{color:#FFFFFF;background:#6FA3FF;border-bottom-color:#2F6BFF}.mobile-nav-buttons,.hamburger-menu,.mobile-menu-overlay{display:none}.site-footer{background:#1F2D3D;color:#FFFFFF;padding:40px 0 0;width:100%;margin-top:40px}.footer-container{max-width:1200px;margin:0 auto;display:flex;flex-wrap:wrap;gap:30px;padding:0 20px 30px;box-sizing:border-box}.footer-brand{flex:2;min-width:260px}.footer-logo{display:inline-block;font-size:32px;font-weight:900;color:#FFFFFF;text-decoration:none;letter-spacing:2px;text-shadow:0 2px 4px rgba(0,0,0,0.5);margin-bottom:12px;font-family:'Arial Black',Arial,sans-serif}.footer-logo:hover{opacity:0.9}.footer-desc{font-size:14px;line-height:1.6;color:#B0C4DE;margin:10px 0 0;max-width:90%}.footer-col{flex:1;min-width:180px}.footer-heading{font-size:18px;font-weight:700;color:#FFFFFF;margin-bottom:15px;padding-bottom:8px;border-bottom:2px solid #6FA3FF;display:inline-block}.footer-nav{list-style:none;padding:0;margin:0}.footer-nav li{margin-bottom:10px}.footer-nav a{color:#B0C4DE;text-decoration:none;font-size:14px;transition:color 0.3s ease}.footer-nav a:hover{color:#A5C4FF;text-decoration:underline}.footer-bottom{background:#16283B;padding:15px 20px;text-align:center;font-size:14px;color:#A5C4FF}.footer-bottom p{margin:0}:root{--header-offset:122px}body{padding-top:var(--header-offset);margin:0}@media(max-width:768px){:root{--header-offset:110px}.header-container{width:100%;max-width:none;padding:0 15px;min-height:48px}.logo{font-size:28px;margin:0 auto}.desktop-nav-buttons{display:none}.main-nav{display:none;position:fixed;top:0;left:0;width:80%;max-width:320px;height:100vh;background:#FFFFFF;flex-direction:column;justify-content:flex-start;align-items:flex-start;padding-top:60px;box-shadow:4px 0 20px rgba(0,0,0,0.2);transition:transform 0.3s ease;transform:translateX(-100%);z-index:1001}.main-nav.active{display:flex;transform:translateX(0)}.nav-container{width:100%;max-width:none;flex-direction:column;align-items:stretch;padding:0}.nav-link{display:block;color:#1F2D3D;text-decoration:none;font-size:18px;font-weight:600;padding:14px 20px;border-bottom:1px solid #D6E2FF;width:100%;box-sizing:border-box;border-left:4px solid transparent}.nav-link:hover{background:#6FA3FF;color:#FFFFFF;border-left-color:#2F6BFF}.mobile-nav-buttons{display:flex;justify-content:center;gap:8px;padding:8px 10px;background:#FFFFFF;border-bottom:1px solid #D6E2FF;width:100%;box-sizing:border-box}.mobile-nav-buttons .btn{flex:1;text-align:center;padding:10px 8px;font-size:13px;max-width:120px}.hamburger-menu{display:flex;flex-direction:column;justify-content:center;align-items:center;width:42px;height:42px;background:transparent;border:2px solid #FFFFFF;border-radius:6px;cursor:pointer;position:fixed;top:6px;left:10px;z-index:1002;padding:0}.hamburger-line{display:block;width:22px;height:3px;background:#FFFFFF;margin:3px 0;border-radius:2px;transition:all 0.3s ease}.hamburger-menu.active .hamburger-line:nth-child(1){transform:translateY(9px) rotate(45deg);background:#FFFFFF}.hamburger-menu.active .hamburger-line:nth-child(2){opacity:0;background:#FFFFFF}.hamburger-menu.active .hamburger-line:nth-child(3){transform:translateY(-9px) rotate(-45deg);background:#FFFFFF}.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}.header-top{position:relative;z-index:1001;background:linear-gradient(180deg,#1E4FCC 0%,#2F6BFF 100%)}.site-footer{padding:30px 0 0}.footer-container{flex-direction:column;gap:20px;padding:0 15px 20px}.footer-brand,.footer-col{min-width:100%}.footer-bottom{padding:12px 15px}.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;
}