:root{--primary-color:#232f3f;--primary-hover:#1b2431;--primary-light:#2f3d50;--primary-dark:#131a22;--secondary-color:#131a22;--primary-gradient:linear-gradient(135deg,#232f3f 0%,#1b2431 100%);--primary-gradient-hover:linear-gradient(135deg,#2f3d50 0%,#232f3f 100%);--btn-bg:var(--primary-gradient);--btn-hover-bg:var(--primary-gradient-hover);--btn-shadow:var(--primary-shadow);--btn-shadow-hover:var(--primary-shadow-hover);--link-color:#2588ff;--link-hover:#1e6fe0;--heading-color:#1e293b;--primary-shadow:0 4px 15px #232f3f40;--primary-shadow-hover:0 6px 20px #232f3f59}*{box-sizing:border-box;-webkit-user-select:none;user-select:none;appearance:none;border:0;outline:0;margin:0;padding:0}html,body{font-size:14px;font-family:-apple-system,system-ui,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif,BlinkMacSystemFont,Helvetica Neue,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Arial!important}a{color:inherit;text-decoration:none;display:inline-block}.app{min-height:100vh}.link{color:var(--link-color)}.container{width:90%;max-width:1040px;height:100%;margin:auto;position:relative}.bg-contain,.bg-cover{background-position:50%;background-repeat:no-repeat}.bg-contain{background-size:contain}.bg-cover{background-size:cover}