:root{--header-offset:122px;--primary:#2F6BFF;--secondary:#6FA3FF;--bg:#F4F7FB;--card-bg:#FFFFFF;--text-main:#1F2D3D;--border:#D6E2FF;--glow:#A5C4FF;}
*,*::before,*::after{box-sizing:border-box;}
body{margin:0;padding-top:var(--header-offset);font-family:'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--text-main);background:var(--bg);}
.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;box-shadow:0 4px 16px rgba(47,107,255,0.18);background:var(--card-bg);}
.header-top{height:68px;min-height:68px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,#1a3fa6 0%,#2F6BFF 100%);width:100%;}
.header-container{width:100%;max-width:1200px;height:100%;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding-left:32px;padding-right:32px;box-sizing:border-box;}
.logo{color:#FFFFFF;font-size:28px;font-weight:800;letter-spacing:1px;text-decoration:none;display:inline-block;line-height:1;text-shadow:0 2px 6px rgba(0,0,0,0.25);}
.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{display:none;min-height:48px;box-sizing:border-box;}
.btn{display:inline-block;text-decoration:none;text-align:center;border:none;cursor:pointer;border-radius:8px;font-weight:700;font-size:15px;padding:10px 22px;line-height:1.2;transition:transform 0.2s ease,box-shadow 0.2s ease;}
.btn:hover{transform:translateY(-1px);}
.btn-login{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#FFFFFF;box-shadow:0 3px 10px rgba(47,107,255,0.35);}
.btn-register{background:linear-gradient(180deg,#6FA3FF 0%,#2F6BFF 100%);color:#FFFFFF;box-shadow:0 3px 10px rgba(111,163,255,0.45);border:1px solid rgba(255,255,255,0.35);}
.hamburger-menu{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.25);border-radius:8px;cursor:pointer;padding:0;z-index:1001;}
.hamburger-line{display:block;width:24px;height:3px;background:#FFFFFF;border-radius:2px;transition:transform 0.3s ease,opacity 0.3s ease;}
.hamburger-menu.active .hamburger-line:nth-child(1){transform:translateY(8px) rotate(45deg);}
.hamburger-menu.active .hamburger-line:nth-child(2){opacity:0;}
.hamburger-menu.active .hamburger-line:nth-child(3){transform:translateY(-8px) rotate(-45deg);}
.main-nav{height:52px;min-height:52px;display:flex;align-items:center;overflow:hidden;background:var(--card-bg);border-top:1px solid var(--border);width:100%;}
.nav-container{width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;gap:4px;box-sizing:border-box;}
.nav-link{display:inline-block;color:var(--text-main);text-decoration:none;font-size:14px;font-weight:600;padding:6px 10px;border-radius:6px;white-space:nowrap;transition:background 0.2s ease,color 0.2s ease;}
.nav-link:hover{background:rgba(47,107,255,0.1);color:var(--primary);}
.nav-link.active{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#FFFFFF;box-shadow:0 2px 8px rgba(47,107,255,0.3);}
.nav-overlay{display:none;position:fixed;inset:0;background:rgba(15,23,42,0.55);z-index:999;opacity:0;transition:opacity 0.3s ease;}
.site-footer{background:#0F1E3D;color:#DCE6FF;padding-top:48px;}
.footer-container{max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px;box-sizing:border-box;}
.footer-top-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-bottom:32px;border-bottom:1px solid rgba(165,196,255,0.2);}
.footer-col{min-width:0;}
.footer-logo{display:inline-block;color:#FFFFFF;font-size:26px;font-weight:800;letter-spacing:1px;text-decoration:none;margin-bottom:14px;}
.footer-description{font-size:14px;line-height:1.7;color:#B8C9EE;margin:0 0 12px;word-wrap:break-word;overflow-wrap:break-word;}
.footer-col-title{font-size:16px;font-weight:700;color:#FFFFFF;margin:0 0 14px;}
.footer-nav{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-nav li a{color:#B8C9EE;text-decoration:none;font-size:14px;transition:color 0.2s ease;}
.footer-nav li a:hover{color:#A5C4FF;}
.footer-mid{padding:28px 0 8px;}
.footer-mid-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:12px;}
.footer-slot-anchor-inner{display:block;}
.footer-bottom{background:rgba(0,0,0,0.25);border-top:1px solid rgba(165,196,255,0.18);padding:18px 0;}
.footer-bottom p{margin:0;text-align:center;font-size:13px;color:#A5C4FF;}
@media (max-width:768px){
  :root{--header-offset:110px;}
  .header-top{height:60px!important;min-height:60px!important;}
  .header-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;position:relative;}
  .logo{flex:1!important;display:flex!important;justify-content:center!important;align-items:center!important;font-size:24px;text-align:center;}
  .logo img{display:block!important;max-width:100%;height:auto;max-height:56px!important;}
  .desktop-nav-buttons{display:none!important;}
  .mobile-nav-buttons{display:flex!important;align-items:center;justify-content:center;width:100%;max-width:100%;box-sizing:border-box;padding:8px 15px;overflow:hidden;gap:10px;flex-wrap:nowrap;background:var(--card-bg);border-bottom:1px solid var(--border);}
  .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;position:relative;z-index:1001;}
  .main-nav{display:none;position:fixed;top:0;left:0;width:82%;max-width:320px;height:100vh;min-height:100vh;background:var(--card-bg);flex-direction:column;justify-content:flex-start;align-items:stretch;padding:80px 16px 24px;transform:translateX(-100%);transition:transform 0.3s ease;z-index:1000;overflow-y:auto;border-top:none;box-shadow:4px 0 24px rgba(15,30,61,0.3);}
  .main-nav.active{display:flex;transform:translateX(0);}
  .nav-container{flex-direction:column;justify-content:flex-start;align-items:stretch;width:100%;max-width:none;height:auto;padding:0;gap:4px;}
  .nav-link{display:block;padding:12px 14px;font-size:15px;border-radius:8px;text-align:left;}
  .nav-overlay.active{display:block;opacity:1;}
  body.no-scroll{overflow:hidden;}
  .footer-top-grid{grid-template-columns:1fr;gap:28px;}
  .footer-mid-grid{grid-template-columns:1fr 1fr;}
  .footer-container{padding-left:18px;padding-right:18px;}
  .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;
}