html,body{width:100%;height:100%}input::-ms-clear{display:none}input::-ms-reveal{display:none}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-ms-overflow-style:scrollbar;-webkit-tap-highlight-color:#0000;font-family:sans-serif;line-height:1.15}body{margin:0}[tabindex="-1"]:focus{outline:none}hr{box-sizing:content-box;height:0;overflow:visible}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5em;font-weight:500}p{margin-top:0;margin-bottom:1em}abbr[title],abbr[data-original-title]{cursor:help;border-bottom:0;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}address{font-style:normal;line-height:inherit;margin-bottom:1em}input[type=text],input[type=password],input[type=number],textarea{-webkit-appearance:none}ol,ul,dl{margin-top:0;margin-bottom:1em}ol ol,ul ul,ol ul,ul ol{margin-bottom:0}dt{font-weight:500}dd{margin-bottom:.5em;margin-left:0}blockquote{margin:0 0 1em}dfn{font-style:italic}b,strong{font-weight:bolder}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}pre,code,kbd,samp{font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;font-size:1em}pre{margin-top:0;margin-bottom:1em;overflow:auto}figure{margin:0 0 1em}img{vertical-align:middle;border-style:none}a,area,button,[role=button],input:not([type=range]),label,select,summary,textarea{touch-action:manipulation}table{border-collapse:collapse}caption{text-align:left;caption-side:bottom;padding-top:.75em;padding-bottom:.3em}input,button,select,optgroup,textarea{color:inherit;font-size:inherit;font-family:inherit;line-height:inherit;margin:0}button,input{overflow:visible}button,select{text-transform:none}button,html [type=button],[type=reset],[type=submit]{-webkit-appearance:button}button::-moz-focus-inner{border-style:none;padding:0}[type=button]::-moz-focus-inner{border-style:none;padding:0}[type=reset]::-moz-focus-inner{border-style:none;padding:0}[type=submit]::-moz-focus-inner{border-style:none;padding:0}input[type=radio],input[type=checkbox]{box-sizing:border-box;padding:0}input[type=date],input[type=time],input[type=datetime-local],input[type=month]{-webkit-appearance:listbox}textarea{resize:vertical;overflow:auto}fieldset{border:0;min-width:0;margin:0;padding:0}legend{width:100%;max-width:100%;color:inherit;font-size:1.5em;line-height:inherit;white-space:normal;margin-bottom:.5em;padding:0;display:block}progress{vertical-align:baseline}[type=number]::-webkit-inner-spin-button{height:auto}[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:none}[type=search]::-webkit-search-cancel-button{-webkit-appearance:none}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:inline-block}summary{display:list-item}template{display:none}[hidden]{display:none!important}:root{color:#192438;font-synthesis:none;text-rendering:optimizelegibility;background:#f5f7fb;font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}#root{min-height:100vh}.boot,.login-page{place-items:center;min-height:100vh;display:grid}.login-page{background:linear-gradient(135deg,#ecf7f2,#f8fafc 52%,#e9f0fb);padding:24px}.login-card{width:min(100%,420px);box-shadow:0 22px 60px #1d39451f}.login-brand{align-items:center;gap:12px;margin-bottom:30px;display:flex}.login-brand h2{font-size:25px;margin:0!important}.brand-mark{color:#fff;background:#159a70;border-radius:8px;place-items:center;width:36px;height:36px;font-weight:800;display:grid}.app-shell{min-height:100vh}.app-sider{flex-direction:column;height:100vh;display:flex;top:0;background:#122034!important;position:sticky!important}.app-sider .ant-layout-sider-children{flex-direction:column;display:flex}.logo-area{color:#fff;align-items:center;gap:10px;height:72px;padding:16px 18px;display:flex;overflow:hidden}.logo-area strong,.logo-area span{white-space:nowrap;display:block}.logo-area strong{font-size:16px}.logo-area span{letter-spacing:.8px;color:#91a3b9;margin-top:3px;font-size:9px}.app-sider .ant-menu{flex:1;padding:8px;background:#122034!important;border-inline-end:0!important}.app-sider .ant-menu-item{width:100%;margin-inline:0}.sider-bottom{border-top:1px solid #ffffff14;padding:14px 12px}.sider-bottom .ant-btn{color:#b8c5d5;text-align:left;width:100%}.app-header{background:#fff;border-bottom:1px solid #e8edf3;justify-content:space-between;align-items:center;height:64px;padding:0 28px;line-height:normal;display:flex}.header-title{color:#223047;font-weight:600}.account-menu{cursor:pointer}.account-copy{flex-direction:column;line-height:1.25;display:flex}.account-copy small{color:#7b8798;margin-top:2px}.app-content{padding:28px;overflow:auto}.page-heading{justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:22px;display:flex}.page-heading h3{margin:0 0 4px!important}.stat-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:20px;display:grid}.course-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.course-card{min-height:174px}.course-meta{color:#748093;margin-top:20px;font-size:13px}.password-alert{margin-bottom:16px}@media (width<=768px){.app-header{padding:0 14px}.header-title,.account-copy{display:none}.app-content{padding:18px}.stat-grid{grid-template-columns:1fr}.page-heading{flex-direction:column;align-items:stretch}.course-grid{grid-template-columns:1fr}}.app-root{background:var(--page-bg);min-height:100vh;color:var(--text-color)}.theme-light{--page-bg:#f5f7fb;--text-color:#192438;--muted-text:#748093;--header-bg:#fff;--header-border:#e8edf3;--surface-bg:#fff;--surface-border:#e5eaf0;--login-start:#ecf7f2;--login-mid:#f8fafc;--login-end:#e9f0fb}.theme-dark{--page-bg:#101820;--text-color:#e6edf3;--muted-text:#a5b2c2;--header-bg:#17232d;--header-border:#2c3a47;--surface-bg:#17232d;--surface-border:#2c3a47;--login-start:#142c2a;--login-mid:#101820;--login-end:#1c2638}.app-root .app-shell,.app-root .ant-layout{background:var(--page-bg)}.app-root .app-header{background:var(--header-bg);border-bottom-color:var(--header-border)}.app-root .header-title{color:var(--text-color)}.app-root .account-copy small,.app-root .course-meta,.app-root .notice-item small{color:var(--muted-text)}.app-root .app-content{color:var(--text-color)}.app-root .login-page{background:linear-gradient(135deg, var(--login-start), var(--login-mid) 52%, var(--login-end))}.app-root .login-card,.app-root .ant-card{background:var(--surface-bg)}.app-root .ant-card{border-color:var(--surface-border)}.theme-dark .ant-typography,.theme-dark .ant-card-head-title,.theme-dark .ant-list-item-meta-title,.theme-dark .ant-list-item-meta-description{color:var(--text-color)}.theme-dark .ant-typography-secondary{color:var(--muted-text)}.theme-dark .ant-table,.theme-dark .ant-table-container,.theme-dark .ant-table-thead>tr>th,.theme-dark .ant-table-tbody>tr>td{background:var(--surface-bg)}.theme-dark .ant-table-thead>tr>th,.theme-dark .ant-table-tbody>tr>td{border-bottom-color:var(--surface-border)}.theme-dark .ant-table-tbody>tr.ant-table-row:hover>td{background:#20303c}.theme-dark .ant-collapse{border-color:var(--surface-border);background:var(--surface-bg)}.theme-dark .ant-collapse>.ant-collapse-item{border-bottom-color:var(--surface-border)}.theme-dark .ant-collapse-content{background:var(--surface-bg);border-top-color:var(--surface-border)}.theme-dark .ant-dropdown-menu,.theme-dark .ant-dropdown-menu-item{background:#1e2d38}.theme-dark .ant-dropdown-menu-item:hover{background:#2a3d4b}.theme-dark .ant-modal-content,.theme-dark .ant-modal-header{background:var(--surface-bg)}.theme-dark .ant-modal-header{border-bottom-color:var(--surface-border)}.theme-dark .ant-modal-title{color:var(--text-color)}.theme-dark .ant-input,.theme-dark .ant-input-affix-wrapper,.theme-dark .ant-select-selector,.theme-dark .ant-picker{color:var(--text-color);background:#101a22!important;border-color:#40515f!important}.theme-dark .ant-input::placeholder,.theme-dark .ant-select-selection-placeholder{color:#8494a5}.theme-dark .ant-btn-text{color:#d6e0e9}.theme-dark .ant-btn-text:hover{background:#263946}.sider-version{color:#6f8195;justify-content:center;align-items:baseline;padding:12px 12px 10px;font-size:11px;display:flex}.sider-version strong{color:#8191a2;letter-spacing:.15px;font-size:11px;font-weight:500}.course-upload-message-dark,.course-upload-message-dark.ant-message-notice-content,.course-upload-message-dark .ant-message-notice-content{color:#e6edf3!important;background:#17232d!important;box-shadow:0 8px 24px #00000052!important}.course-upload-message-dark .ant-progress-text,.course-upload-message-dark.ant-message-notice-content .ant-progress-text{color:#d7e2eb!important}.course-upload-message-dark .ant-progress-inner,.course-upload-message-dark.ant-message-notice-content .ant-progress-inner{background-color:#30404d!important}.captcha-row{align-items:stretch;gap:10px;display:flex}.captcha-row>.ant-form-item{flex:1;min-width:0;margin-bottom:0}.captcha-image-button{flex:0 0 168px;height:40px;padding:0;overflow:hidden}.captcha-image-button img{object-fit:cover;width:168px;height:52px;display:block}@media (width<=420px){.captcha-row{gap:8px}.captcha-image-button{flex-basis:132px}.captcha-image-button img{width:132px}}.notice-item{white-space:normal;flex-direction:column;max-width:280px;display:flex}.notice-item small{color:#6f7d8f;margin-top:3px}.player-card video{background:#0d1722;width:100%;max-height:560px;margin-bottom:12px;display:block}.course-search,.progress-search{width:min(100%,280px)}.progress-course-collapse .ant-collapse-content-box{padding:0}.course-detail-progress{width:min(100%,320px);margin:4px 0 0!important}.course-cover{object-fit:cover;width:100%;height:150px;display:block}.content-thumbnail{object-fit:cover;background:#e9eef3;border-radius:4px;width:96px;height:54px}.preview-player{aspect-ratio:16/9;background:#0b1117;border-radius:6px;width:80%;margin-top:18px;overflow:hidden}@media (width<=640px){.preview-player{width:100%}}.preview-player video{width:100%;height:100%;display:block}.content-detail-card{margin-bottom:16px}.content-detail-description{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.75;margin:18px 0!important}.learning-actions{flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;display:flex}.course-breadcrumb{align-items:center;min-height:32px;margin-bottom:12px;display:flex}.course-breadcrumb ol,.course-breadcrumb li,.course-breadcrumb .ant-breadcrumb-link,.course-breadcrumb .ant-breadcrumb-separator{align-items:center;line-height:32px;display:inline-flex}.course-breadcrumb .ant-btn{align-items:center;height:32px;padding-inline:0;line-height:1;display:inline-flex}.course-card-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));align-items:stretch;gap:16px;width:100%;min-width:0;display:grid}.course-card-grid>*{width:100%;min-width:0}.course-card{flex-direction:column;width:100%;min-width:0;height:100%;display:flex;overflow:hidden}.course-card .ant-card-body{flex-direction:column;flex:1;min-width:0;min-height:108px;display:flex}.course-card .ant-card-head-wrapper,.course-card .ant-card-head-title,.course-card .ant-card-extra{min-width:0}.course-card .ant-card-head-title{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.course-card .ant-typography{overflow-wrap:anywhere;margin-bottom:0}.course-card .ant-card-actions{grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.course-card .ant-card-actions>li{min-width:0;margin:0;width:auto!important}.course-card .ant-card-actions>li>span{text-align:center;width:100%;display:block}.course-card .ant-card-actions .ant-btn{text-overflow:ellipsis;white-space:nowrap;width:100%;max-width:100%;padding-inline:6px;overflow:hidden}.course-card-action{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:4px;margin-top:auto;padding-top:14px;display:flex}.teacher-course-actions .ant-btn{text-overflow:ellipsis;white-space:nowrap;width:100%;min-width:0;padding-inline:2px;overflow:hidden}.teacher-course-actions{flex-wrap:nowrap;grid-template-columns:repeat(3,minmax(0,1fr));justify-content:stretch;gap:4px;display:grid}@media (width<=768px){.course-search,.progress-search{width:100%}}@media (width<=560px){.course-card-grid{grid-template-columns:minmax(0,1fr)}.course-card .ant-card-actions{grid-template-columns:repeat(3,minmax(0,1fr))}}