.site-header{position:fixed;top:0;left:0;width:100%;min-height:auto;z-index:1000;background:#FFFFFF;box-shadow:0 4px 20px rgba(0,0,0,0.08);display:block;border-bottom:none}.header-top{background:#1F2D3D;width:100%;min-height:68px}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding-left:30px;padding-right:30px;min-height:68px}.logo{font-size:26px;font-weight:900;color:#FFFFFF;text-decoration:none;letter-spacing:1px;font-family:'Segoe UI',Arial,sans-serif;display:inline-block;line-height:1.2}.logo:hover{color:#A5C4FF}.desktop-nav-buttons{display:flex;flex-direction:row;align-items:center;gap:12px;justify-content:flex-end}.btn{display:inline-block;padding:7px 16px;border-radius:20px;font-size:14px;font-weight:700;text-decoration:none;text-align:center;cursor:pointer;transition:all 0.3s ease;min-height:36px;line-height:1.6;white-space:nowrap;color:#FFFFFF;border:none}.btn-register,.btn-download{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);box-shadow:0 2px 8px rgba(47,107,255,0.3)}.btn-register:hover,.btn-download:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(47,107,255,0.5);color:#FFFFFF}.main-nav{background:#FFFFFF;width:100%;display:flex;flex-direction:row;justify-content:center;min-height:52px;position:static;border-top:1px solid #D6E2FF}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding-left:20px;padding-right:20px;gap:0;flex-wrap:wrap}.nav-link{font-size:15px;font-weight:600;color:#1F2D3D;text-decoration:none;padding:14px 20px;display:inline-block;line-height:1.4;transition:background 0.3s,color 0.3s;white-space:nowrap}.nav-link:hover,.nav-link.active{color:#2F6BFF;background:#F4F7FB}.nav-link:first-child{color:#2F6BFF;font-weight:800}.mobile-menu-overlay,.hamburger-menu{display:none}.mobile-nav-buttons{display:none}.site-footer{width:100%;background:#1F2D3D;color:#FFFFFF;margin-top:40px}.footer-container{max-width:1200px;margin:0 auto;padding:50px 30px 30px;display:grid;grid-template-columns:2fr 1fr 1.5fr;gap:40px}.footer-logo{color:#FFFFFF;font-size:24px;font-weight:800;text-decoration:none;display:inline-block}.footer-logo:hover{color:#A5C4FF}.footer-description{font-size:14px;line-height:1.6;color:#B0C4DE;margin-top:15px;max-width:300px}.footer-heading{font-size:16px;font-weight:700;margin-bottom:15px;color:#FFFFFF}.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.footer-links li a{color:#B0C4DE;text-decoration:none;font-size:14px;line-height:1.4}.footer-links li a:hover{color:#A5C4FF;text-decoration:underline}.footer-bottom{border-top:1px solid rgba(160,180,200,0.2);padding:20px 0;display:flex;justify-content:center;align-items:center;color:#B0C4DE}.footer-bottom p{font-size:13px}.site-footer .footer-bottom #copyright-year{font-weight:700;color:#FFFFFF}body{padding-top:var(--header-offset,122px);margin:0;font-family:'Segoe UI',Tahoma,Arial,sans-serif;background:#F4F7FB;color:#1F2D3D;overflow-x:hidden}.page-content{max-width:100%;overflow-x:hidden}@media(max-width:768px){:root{--header-offset:146px}.site-header{display:block}.header-top{min-height:60px}.header-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;min-height:60px;justify-content:center;position:relative}.logo{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:22px}.header-container .desktop-nav-buttons{display:none}.desktop-nav-buttons{display:none;visibility:hidden;opacity:0}.hamburger-menu{display:flex;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;border:none;cursor:pointer;position:absolute;left:15px;top:50%;z-index:1001;background:transformed 0180deg,#1F2D3D;background:#1F2D3D;border-radius:8px;padding:0;transform:translateY(-50%)}.hamburger-menu span{display:block;width:22px;height:2px;background:#FFFFFF;margin:3px 0;transition:all 0.3s ease;border-radius:2px}.hamburger-menu.active span:nth-child(1){transform:rotate(45deg) translate(4px,4px)}.hamburger-menu.active span:nth-child(2){opacity:0;transform:translateX(-10px)}.hamburger-menu.active span:nth-child(3){transform:rotate(-45deg) translate(4px,-4px)}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:999}.mobile-menu-overlay.active{display:block}.main-nav{display:none;flex-direction:column;position:fixed;top:0;right:-80%;width:80%;height:100%;min-height:100vh;background:#FFFFFF;z-index:1000;transform:translateX(100%);transition:transform 0.3s ease,right 0.3s ease;left:auto;justify-content:flex-start;padding-top:70px;border:none}.main-nav.active{display:flex;transition:transform 0.3s ease;right:0;transform:translateX(0);padding-top:80px;padding-bottom:30px;background:#FFFFFF;box-shadow:-4px 0 20px rgba(0,0,0,0.15);border:none}.nav-container{width:100%;max-width:none;flex-direction:column;align-items:flex-start;padding-left:20px;padding-right:20px;gap:0}.main-nav .nav-link{font-size:14px;padding:10px 0;color:#1F2D3D;width:100%;border-bottom:1px solid #F4F7FB}.main-nav .nav-link:hover,.main-nav .nav-link.active{background:#F4F7FB;color:#2F6BFF;padding-left:12px}.main-nav .nav-link:first-child{color:#2F6BFF}.mobile-nav-buttons{display:flex;position:relative;top:auto;left:0;right:0;flex-direction:row;justify-content:center;align-items:center;gap:10px;padding:10px 15px;background:#1F2D3D;z-index:998;box-shadow:0 2px 6px rgba(0,0,0,0.1)}.mobile-nav-buttons .btn{padding:6px 12px;font-size:12px;min-height:34px;background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#FFFFFF}.site-footer .footer-container{width:100%;max-width:none;grid-template-columns:1fr;padding:30px 15px 20px;gap:30px}.container,.page-content{width:100%}.page-content{max-width:100%}.page-content img{max-width:100%!important;height:auto!important;display:block;margin:0 auto}.page-content{overflow-x:hidden;max-width:100%}body{overflow-x:hidden}.header-top::after{content:'';display:none}.mobile-nav-buttons .btn-close{position:absolute;right:10px;top:5px}body.no-scroll{overflow: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;
}