:root{--primary:#2F6BFF;--secondary:#6FA3FF;--bg:#F4F7FB;--card-bg:#FFFFFF;--text-main:#1F2D3D;--border:#D6E2FF;--glow:#A5C4FF;--btn-gradient:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);--header-offset:122px;}*{box-sizing:border-box;}body{margin:0;padding-top:var(--header-offset);font-family:'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text-main);}.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;background:var(--card-bg);box-shadow:0 4px 20px rgba(47,107,255,0.18);border-bottom:2px solid var(--border);}.header-top{box-sizing:border-box;height:68px;min-height:68px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,#EEF4FF 100%);width:100%;}.header-container{box-sizing:border-box;width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding-left:24px;padding-right:24px;}.logo{display:inline-block;font-size:30px;font-weight:800;letter-spacing:1px;color:var(--primary);text-decoration:none;line-height:1;}.logo:hover{color:var(--secondary);}.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;}.btn{display:inline-block;text-decoration:none;text-align:center;border-radius:8px;font-weight:700;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;border:none;line-height:1.2;}.btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(47,107,255,0.35);}.desktop-nav-buttons .btn{padding:10px 22px;font-size:14px;}.btn-login{background:var(--card-bg);color:var(--primary);border:2px solid var(--primary);}.btn-login:hover{background:#EEF4FF;}.btn-register{background:var(--btn-gradient);color:#FFFFFF;box-shadow:0 2px 10px rgba(47,107,255,0.4);}.mobile-nav-buttons{box-sizing:border-box;display:none;min-height:48px;}.hamburger-menu{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;background:transparent;border:none;cursor:pointer;padding:8px;z-index:1001;}.hamburger-menu span{display:block;width:26px;height:3px;background:var(--primary);border-radius:2px;transition:transform .3s ease,opacity .3s ease;}.hamburger-menu.active span:nth-child(1){transform:translateY(8px) rotate(45deg);}.hamburger-menu.active span:nth-child(2){opacity:0;}.hamburger-menu.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}.main-nav{box-sizing:border-box;height:52px;min-height:52px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(180deg,#2F6BFF 0%,#1E52D6 100%);width:100%;}.nav-container{box-sizing:border-box;height:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;gap:2px;}.nav-link{display:inline-block;padding:8px 12px;color:#FFFFFF;text-decoration:none;font-size:13px;font-weight:600;border-radius:6px;white-space:nowrap;transition:background .2s ease,color .2s ease;}.nav-link:hover{background:rgba(255,255,255,0.18);color:#FFFFFF;}.nav-link.active{background:#FFFFFF;color:var(--primary);}.nav-overlay{position:fixed;inset:0;background:rgba(15,30,60,0.55);opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;z-index:999;}.nav-overlay.active{opacity:1;visibility:visible;}.site-footer{background:linear-gradient(180deg,#0F2A66 0%,#0A1E4A 100%);color:#DCE8FF;margin-top:40px;}.footer-container{max-width:1200px;margin:0 auto;padding:0 24px;}.footer-top{padding:44px 0 8px;}.footer-top-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px;}.footer-col{min-width:0;}.footer-logo{display:inline-block;font-size:28px;font-weight:800;letter-spacing:1px;color:#FFFFFF;text-decoration:none;margin-bottom:14px;}.footer-logo:hover{color:var(--glow);}.footer-description{font-size:14px;line-height:1.7;color:#C5D8FF;margin:0 0 12px;word-wrap:break-word;overflow-wrap:break-word;}.footer-title{font-size:16px;font-weight:700;color:#FFFFFF;margin:0 0 14px;padding-bottom:8px;border-bottom:2px solid rgba(111,163,255,0.4);}.footer-nav{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;}.footer-nav li a{color:#C5D8FF;text-decoration:none;font-size:14px;transition:color .2s ease,padding-left .2s ease;display:inline-block;}.footer-nav li a:hover{color:#FFFFFF;padding-left:4px;}.footer-slot-anchor-inner{min-height:0;}.footer-mid{padding:8px 0;}.footer-mid-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}.footer-bottom{background:#081736;padding:18px 0;text-align:center;border-top:1px solid rgba(111,163,255,0.25);}.footer-bottom p{margin:0;font-size:13px;color:#A9C2EF;}.page-content{max-width:100%;}.page-content img{max-width:100%;height:auto;display:block;}@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;}.logo{flex:1!important;display:flex!important;justify-content:center!important;align-items:center!important;font-size:26px;}.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-left:15px;padding-right:15px;overflow:hidden;gap:10px;flex-wrap:nowrap;}.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;}.main-nav{display:none;position:fixed;top:var(--header-offset);left:0;width:82%;max-width:320px;height:calc(100vh - var(--header-offset));min-height:0;flex-direction:column;justify-content:flex-start;align-items:stretch;background:linear-gradient(180deg,#1E52D6 0%,#123C9E 100%);box-shadow:4px 0 20px rgba(0,0,0,0.35);transform:translateX(-100%);transition:transform .3s ease;overflow-y:auto;z-index:1000;padding:16px 0;}.main-nav.active{display:block;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:2px;}.nav-link{display:block;padding:14px 24px;font-size:15px;border-radius:0;white-space:normal;}.nav-link.active{background:rgba(255,255,255,0.16);color:#FFFFFF;}.footer-top-grid{grid-template-columns:1fr;gap:28px;}.footer-mid-grid{grid-template-columns:1fr;}.footer-container{padding:0 16px;}.footer-top{padding:32px 0 8px;}.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;
}