:root{--primary:#2F6BFF;--secondary:#6FA3FF;--btn-gradient:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);--bg-card:#FFFFFF;--bg-page:#F4F7FB;--text-main:#1F2D3D;--border-color:#D6E2FF;--glow:#A5C4FF;--header-offset:122px;}
*,*::before,*::after{box-sizing:border-box;}
body{padding-top:var(--header-offset);margin:0;background-color:var(--bg-page);color:var(--text-main);font-family:'Segoe UI',Roboto,Arial,sans-serif;}
.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;box-shadow:0 4px 16px rgba(47,107,255,0.15);}
.header-top{box-sizing:border-box;height:68px;min-height:68px;display:flex;align-items:center;overflow:hidden;background-color:var(--primary);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;color:#FFFFFF;font-size:26px;font-weight:800;letter-spacing:1px;text-decoration:none;line-height:1;}
.logo:hover{opacity:0.9;}
.desktop-nav-buttons{display:flex;gap:12px;align-items:center;}
.mobile-nav-buttons{box-sizing:border-box;display:none;min-height:48px;}
.btn{display:inline-block;text-decoration:none;border-radius:8px;font-weight:700;text-align:center;transition:all 0.25s ease;border:none;cursor:pointer;}
.btn-login{background-color:transparent;color:#FFFFFF;border:2px solid #FFFFFF;padding:9px 22px;font-size:15px;}
.btn-login:hover{background-color:rgba(255,255,255,0.15);}
.btn-register{background:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);color:#FFFFFF;padding:11px 24px;font-size:15px;border:2px solid transparent;box-shadow:0 2px 8px rgba(255,255,255,0.25);}
.btn-register:hover{filter:brightness(1.1);box-shadow:0 4px 12px rgba(255,255,255,0.35);}
.main-nav{box-sizing:border-box;height:52px;min-height:52px;display:flex;align-items:center;overflow:hidden;background-color:#FFFFFF;width:100%;border-top:1px solid var(--border-color);}
.nav-container{box-sizing:border-box;height:100%;width:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;position:relative;}
.hamburger-menu{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:transparent;border:none;cursor:pointer;padding:8px;width:44px;height:44px;}
.hamburger-line{display:block;width:24px;height:3px;background-color:var(--text-main);border-radius:2px;transition:all 0.3s ease;}
.nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:row;justify-content:center;align-items:center;gap:6px;flex-wrap:nowrap;}
.nav-list li{margin:0;}
.nav-link{display:block;text-decoration:none;color:var(--text-main);font-size:14px;font-weight:600;padding:8px 12px;border-radius:6px;transition:all 0.25s ease;white-space:nowrap;}
.nav-link:hover,.nav-link.active{background-color:var(--primary);color:#FFFFFF;}
@media (max-width:768px){
:root{--header-offset:110px;}
.header-top{height:60px;min-height:60px;}
.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:22px;}
.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;background-color:var(--primary);padding-top:8px;padding-bottom:8px;}
.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;}
.mobile-nav-buttons .btn-login{padding:8px 12px;border-width:1.5px;}
.mobile-nav-buttons .btn-register{padding:8px 12px;}
.main-nav{height:48px;min-height:48px;display:flex;position:relative;transform:translateY(-100%);transition:transform 0.3s ease;border-top:none;}
.nav-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;justify-content:flex-start;}
.hamburger-menu{display:flex;position:absolute;right:15px;top:2px;z-index:1001;}
.nav-list{display:none;position:fixed;top:0;left:0;width:280px;max-width:85%;height:100vh;background-color:#FFFFFF;flex-direction:column;justify-content:flex-start;align-items:stretch;padding:70px 20px 20px;gap:4px;box-shadow:4px 0 20px rgba(0,0,0,0.15);transform:translateX(-100%);transition:transform 0.3s ease;overflow-y:auto;z-index:999;}
.nav-list li{width:100%;}
.nav-link{padding:12px 16px;font-size:15px;border-radius:8px;white-space:normal;}
.main-nav.active{transform:translateY(0);}
.main-nav.active .nav-list{display:flex;transform:translateX(0);}
.hamburger-menu.active .hamburger-line:nth-child(1){transform:rotate(45deg) translate(5px,6px);}
.hamburger-menu.active .hamburger-line:nth-child(2){opacity:0;}
.hamburger-menu.active .hamburger-line:nth-child(3){transform:rotate(-45deg) translate(5px,-6px);}
body.no-scroll{overflow:hidden;}
.nav-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100vh;background:rgba(0,0,0,0.5);z-index:998;opacity:0;transition:opacity 0.3s ease;}
.nav-overlay.active{display:block;opacity:1;}
.page-content img{max-width:100% !important;height:auto !important;display:block;}
.page-content{overflow-x:hidden;max-width:100%;}
body{overflow-x:hidden;}
}
.site-footer{background-color:#0B1A33;color:#D6E2FF;padding-top:0;margin-top:0;}
.footer-container{max-width:1200px;margin:0 auto;padding:0 24px;box-sizing:border-box;width:100%;}
.footer-top-row{padding:20px 0;border-bottom:1px solid rgba(214,226,255,0.15);}
.footer-top-grid{padding:40px 0 30px;}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}
.footer-col{display:flex;flex-direction:column;}
.footer-about{grid-column:span 1;}
.footer-logo{display:inline-block;color:#FFFFFF;font-size:28px;font-weight:800;letter-spacing:1px;text-decoration:none;margin-bottom:16px;}
.footer-logo:hover{opacity:0.9;}
.footer-description{color:#B0C4E8;font-size:14px;line-height:1.7;margin:0 0 16px;word-wrap:break-word;overflow-wrap:break-word;}
.footer-heading{color:#FFFFFF;font-size:16px;font-weight:700;margin:0 0 16px;}
.footer-nav{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-nav li{margin:0;}
.footer-nav a{color:#B0C4E8;text-decoration:none;font-size:14px;transition:color 0.25s ease;}
.footer-nav a:hover{color:#A5C4FF;}
.footer-dynamic-col{grid-column:span 1;}
.footer-slot-anchor-inner{min-height:1px;}
.footer-mid-section{padding:20px 0;}
.footer-mid-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:16px;}
.footer-bottom-slot{padding:10px 0;}
.footer-bottom{border-top:1px solid rgba(214,226,255,0.15);padding:20px 0;text-align:center;}
.footer-copyright{color:#8FA8D4;font-size:13px;margin:0;}
@media (max-width:768px){
.footer-container{padding:0 15px;}
.footer-grid{grid-template-columns:1fr;gap:24px;}
.footer-top-grid{padding:30px 0 20px;}
.footer-heading{font-size:15px;}
.footer-nav a{font-size:14px;}
.footer-mid-grid{grid-template-columns:repeat(2,1fr);}
.footer-logo{font-size:24px;}
.footer-description{font-size:13px;}
.footer-copyright{font-size:12px;}
}
/* 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;
}