:root{--header-offset:166px;--primary:#2F6BFF;--secondary:#6FA3FF;--bg:#F4F7FB;--card-bg:#FFFFFF;--text-main:#1F2D3D;--text-black:#000000;--border:#D6E2FF;--glow:#A5C4FF;--btn-bg:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);--header-top-bg:#1B3E8F;--nav-bg:#F4F7FB;--nav-item-color:#1F2D3D;--nav-item-hover:var(--primary);--footer-bg:#1B3E8F;--footer-text:#FFFFFF;--footer-link:#D6E2FF;--footer-link-hover:#FFFFFF}.site-footer{position:relative;z-index:100;background-color:var(--footer-bg);color:var(--footer-text);padding:20px 0 0}.site-footer .footer-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;padding:20px 20px;justify-content:center}.site-footer .footer-column{padding:10px}.site-footer .footer-logo{font-size:24px;font-weight:800;color:var(--footer-text);text-decoration:none;display:inline-block;margin-bottom:12px;letter-spacing:1px}.site-footer .footer-description{color:var(--footer-link);font-size:14px;line-height:1.6;margin-bottom:10px}.site-footer .footer-heading{font-size:18px;font-weight:700;color:var(--footer-text);margin-bottom:12px;position:relative;padding-bottom:6px;display:inline-block}.site-footer .footer-heading:after{content:'';position:absolute;left:0;bottom:0;width:50px;height:2px;background:var(--btn-bg)}.site-footer .footer-nav{list-style:none;padding:0;margin:0}.site-footer .footer-nav li{margin-bottom:8px}.site-footer .footer-nav a{color:var(--footer-link);text-decoration:none;font-size:14px;transition:color .3s ease}.site-footer .footer-nav a:hover{color:var(--footer-link-hover);padding-left:4px;transition:all .3s ease}.site-footer .footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:12px 20px;text-align:center;background-color:rgba(0,0,0,.2)}.site-footer .footer-copyright{font-size:14px;color:var(--footer-link);margin:0}.site-footer .footer-disclaimer{font-size:12px;color:rgba(255,255,255,.5);margin-top:4px}@media(max-width:768px){.site-footer .footer-container{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:15px;padding:15px 15px}.site-footer .footer-copyright{font-size:12px}.site-footer .footer-description{font-size:12px}.site-footer .footer-nav a{font-size:13px}}.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background-color:var(--nav-bg);box-shadow:0 2px 10px rgba(0,0,0,.15);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;line-height:1.4}body{padding-top:var(--header-offset);margin:0;background-color:var(--bg)}@media(max-width:768px){:root{--header-offset:146px}body{padding-top:var(--header-offset)}.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{background-color:var(--header-top-bg);width:100%;display:flex}.header-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding-left:25px;padding-right:25px;min-height:68px}.logo{font-size:26px;font-weight:900;color:var(--secondary);text-decoration:none;display:inline-block;letter-spacing:1px;text-transform:uppercase;line-height:1.2}.logo:hover{color:#fff}.main-nav{background-color:var(--nav-bg);width:100%;display:flex;justify-content:center;border-bottom:1px solid var(--border)}.nav-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:6px 20px;flex-wrap:wrap;gap:2px}.nav-link{color:var(--nav-item-color);text-decoration:none;font-size:14px;font-weight:600;padding:6px 12px;border-radius:4px;transition:background-color .3s,color .3s;white-space:nowrap}.nav-link:hover,.nav-link.active{background-color:var(--primary);color:#fff}.nav-close{display:none}.desktop-nav-buttons{display:flex;align-items:center;gap:10px}.desktop-nav-buttons .btn{text-decoration:none}.mobile-nav-buttons{display:none}.mobile-menu-overlay{display:none}.hamburger-menu{display:none}.btn{display:inline-block;padding:8px 20px;background:var(--btn-bg);color:#fff;font-size:14px;font-weight:700;border-radius:25px;text-decoration:none;transition:transform .2s,box-shadow .2s;border:none}.btn-register{background:linear-gradient(180deg,#ffa500,#ff7b00);padding:8px 24px;color:#fff}.btn-login{background:var(--btn-bg);padding:8px 24px}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(47,107,255,.4);text-decoration:none}.btn:active{transform:translateY(0)}@media(max-width:768px){.header-top{background-color:var(--header-top-bg)}.header-container{width:100%;max-width:none;padding-left:10px;padding-right:10px;min-height:60px}.logo{font-size:20px}.desktop-nav-buttons{display:none}.main-nav{display:none;position:fixed;top:0;left:0;width:70%;max-width:300px;height:100vh;background:#fff;flex-direction:column;justify-content:flex-start;padding-top:50px;transform:translateX(-100%);transition:transform .3s ease;align-items:stretch;z-index:1001;overflow-y:auto}.main-nav.active{display:block;transform:translateX(0);box-shadow:2px 0 15px rgba(0,0,0,.3)}.nav-container{display:flex;flex-direction:column;width:100%;padding:0;align-items:stretch}.nav-link{display:block;padding:14px 20px;color:var(--text-main);font-size:16px;font-weight:600;border-bottom:1px solid var(--border);transition:background-color .3s,color .3s;border-radius:0}.nav-link:hover,.nav-link.active{background-color:var(--primary);color:#fff;border-radius:0}.nav-close{display:block;position:absolute;top:10px;right:15px;font-size:24px;color:#999;text-decoration:none;padding:5px}.nav-close:hover{color:var(--primary)}.mobile-nav-buttons{display:flex;width:100%;background-color:var(--header-top-bg);justify-content:center;padding:8px 10px;z-index:1000}.mobile-nav-container{display:flex;justify-content:center;gap:10px;width:100%;max-width:none;padding:0}.mobile-nav-container .btn{flex:1;text-align:center;margin:0}.mobile-menu-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:999;display:none}.mobile-menu-overlay.active{display:block}.hamburger-menu{display:flex;flex-direction:column;justify-content:center;gap:5px;background:none;border:none;cursor:pointer;z-index:1002;padding:8px;width:44px;height:44px;align-items:center}.hamburger-menu span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s ease;margin:0}.hamburger-menu.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px);background:var(--primary)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px);background:var(--primary)}}
/* 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;
}