: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,Arial,sans-serif;background:var(--bg);color:var(--text-main);}a{text-decoration:none;}.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;background:#FFFFFF;box-shadow:0 4px 18px rgba(31,45,61,0.12);}.header-top{box-sizing:border-box;height:68px;min-height:68px;display:flex;align-items:center;overflow:hidden;background:#FFFFFF;border-bottom:1px solid var(--border);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{font-size:28px;font-weight:800;letter-spacing:1px;color:var(--primary);display:inline-block;line-height:1;}.logo:hover{color:var(--secondary);}.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-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:8px;font-size:14px;font-weight:700;line-height:1.2;cursor:pointer;border:none;text-decoration:none;transition:transform .2s ease,box-shadow .2s ease;white-space:nowrap;}.btn-login{background:#FFFFFF;color:var(--primary);border:2px solid var(--primary);}.btn-login:hover{background:var(--bg);}.btn-register{background:var(--btn-gradient);color:#FFFFFF;box-shadow:0 4px 12px rgba(47,107,255,0.35);}.btn-register:hover{box-shadow:0 6px 18px rgba(47,107,255,0.5);transform:translateY(-1px);}.main-nav{box-sizing:border-box;height:52px;min-height:52px;display:flex;align-items:center;overflow:hidden;background:var(--primary);width:100%;}.nav-container{box-sizing:border-box;width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;position:relative;}.nav-menu{list-style:none;margin:0;padding:0;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:4px;height:100%;}.nav-menu li{height:100%;display:flex;align-items:center;}.nav-link{display:flex;align-items:center;height:100%;padding:0 12px;color:#FFFFFF;font-size:14px;font-weight:600;transition:background .2s ease,color .2s ease;white-space:nowrap;}.nav-link:hover,.nav-link.active{background:rgba(255,255,255,0.16);color:#FFFFFF;border-radius:4px;}.hamburger-menu{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;background:transparent;border:none;cursor:pointer;padding:0;z-index:1001;}.hamburger-line{display:block;width:24px;height:3px;background:#FFFFFF;border-radius:2px;transition:transform .3s ease,opacity .3s ease;}.nav-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(31,45,61,0.55);z-index:999;opacity:0;transition:opacity .3s ease;}.nav-overlay.active{display:block;opacity:1;}.site-footer{background:#FFFFFF;border-top:3px solid var(--primary);color:var(--text-main);}.footer-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;box-sizing:border-box;}.footer-top{padding:48px 0 24px;}.footer-top-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}.footer-col{min-width:0;}.footer-about .footer-logo{display:inline-block;font-size:26px;font-weight:800;color:var(--primary);margin-bottom:14px;}.footer-description{margin:0 0 16px;font-size:14px;line-height:1.7;color:#4A5A6E;word-wrap:break-word;overflow-wrap:break-word;}.footer-title{margin:0 0 16px;font-size:16px;font-weight:700;color:var(--text-main);}.footer-nav{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}.footer-nav a{color:#4A5A6E;font-size:14px;transition:color .2s ease;}.footer-nav a:hover{color:var(--primary);}.footer-slot-anchor-inner{min-height:1px;}.footer-slot-anchor{min-height:1px;}.footer-mid{padding:24px 0;background:var(--bg);}.footer-mid-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:16px;}.footer-mid-grid:last-child{margin-bottom:0;}.footer-bottom-wrap{background:var(--primary);padding:20px 0;}.footer-bottom{text-align:center;}.footer-copyright{margin:0;font-size:14px;color:#FFFFFF;}.footer-bottom-wrap .footer-slot-anchor{min-height:1px;}@media (max-width:768px){:root{--header-offset:110px;}body{padding-top:var(--header-offset);overflow-x:hidden;}.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:24px;}.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:#FFFFFF;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;}.main-nav{height:48px !important;min-height:48px !important;}.nav-container{width:100%;max-width:none;padding-left:15px;padding-right:15px;justify-content:flex-start;}.hamburger-menu{display:flex;}.nav-menu{display:none;flex-direction:column;position:fixed;top:var(--header-offset);left:0;width:280px;max-width:80%;height:calc(100vh - var(--header-offset));background:var(--primary);padding:20px 0;gap:0;overflow-y:auto;z-index:1001;transform:translateX(-100%);transition:transform .3s ease;align-items:stretch;justify-content:flex-start;}.nav-menu.active{display:flex;transform:translateX(0);}.nav-menu li{height:auto;display:block;width:100%;}.nav-link{height:auto;padding:14px 24px;font-size:15px;border-radius:0;width:100%;}.nav-link:hover,.nav-link.active{background:rgba(255,255,255,0.16);border-radius:0;}.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);}.footer-top-grid{grid-template-columns:1fr;gap:28px;}.footer-mid-grid{grid-template-columns:1fr 1fr;}.footer-top{padding:32px 0 16px;}.footer-container{padding:0 16px;}.footer-description{max-width:100%;}.page-content img{max-width:100% !important;height:auto !important;display:block;}.page-content{overflow-x:hidden;max-width:100%;}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;
}