@charset "UTF-8";@import"https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Rajdhani:wght@300;400;500;600;700&family=Share+Tech+Mono&display=swap";._app-header_9cxf7_75{position:sticky;top:0;z-index:50;width:100%;background:var(--meedu-card);border-bottom:1px solid var(--meedu-border);box-shadow:var(--meedu-shadow-xs)}._app-header_9cxf7_75 ._main-header_9cxf7_84{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;box-sizing:border-box}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91{width:100%;height:72px;display:flex;align-items:center;justify-content:space-between}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._App-logo_9cxf7_98{display:flex;align-items:center;gap:8px;text-decoration:none;flex:0 0 auto}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._App-logo_9cxf7_98 img{height:40px;width:auto;object-fit:contain;filter:none;transition:opacity .2s ease}._app-header_9cxf7_75 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._top-header_9cxf7_91 ._user-box_9cxf7_170 ._teacher-dashboard-icon_9cxf7_178,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._study-icon_9cxf7_179{display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;color:var(--meedu-text-secondary);font-size:14px;cursor:pointer;transition:color .2s ease}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._vip-icon_9cxf7_176 ._text_9cxf7_190,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._instructor-icon_9cxf7_177 ._text_9cxf7_190,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._teacher-dashboard-icon_9cxf7_178 ._text_9cxf7_190,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._study-icon_9cxf7_179 ._text_9cxf7_190{font-size:12px;line-height:1;white-space:nowrap;text-shadow:none}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._vip-icon_9cxf7_176:hover,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._instructor-icon_9cxf7_177:hover,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._teacher-dashboard-icon_9cxf7_178:hover,._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._study-icon_9cxf7_179:hover{color:var(--meedu-primary);text-shadow:none}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._header-auth_9cxf7_206{display:flex;align-items:center;gap:12px}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._header-auth_9cxf7_206 a{font-size:14px;color:var(--meedu-text-secondary);cursor:pointer;text-decoration:none;transition:color .2s ease}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._header-auth_9cxf7_206 a:hover{color:var(--meedu-primary)}._app-header_9cxf7_75 ._main-header_9cxf7_84 ._top-header_9cxf7_91 ._user-box_9cxf7_170 ._header-auth__sep_9cxf7_221{color:var(--meedu-divider);font-size:14px}._app-header_9cxf7_75 .header-menu{max-width:1200px;margin:0 auto;padding:0 20px;box-sizing:border-box}._app-header_9cxf7_75 .header-menu .ant-menu{background:transparent!important;border-bottom:none!important;line-height:48px;font-family:var(--meedu-font-primary)}._app-header_9cxf7_75 .header-menu .ant-menu-item{padding:0 16px!important;margin:0 8px!important;line-height:48px!important;border-bottom:2px solid transparent!important;border-top:none!important;font-size:15px;font-weight:500;color:var(--meedu-text-secondary)!important;transition:all .2s ease}._app-header_9cxf7_75 .header-menu .ant-menu-item:after{display:none!important}._app-header_9cxf7_75 .header-menu .ant-menu-item:hover{color:var(--meedu-primary)!important;border-bottom:2px solid transparent!important}._app-header_9cxf7_75 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