.course-detail-page{padding:0 20px 14px;background:#fff;min-height:100dvh}.detail-topbar{height:54px;display:flex;align-items:center;justify-content:space-between;gap:20px}.detail-brand{display:inline-flex;align-items:center;gap:8px;color:var(--ink);text-decoration:none}.detail-brand strong{font-size:22px;font-weight:750;letter-spacing:-1px}.detail-brand>span{margin-left:9px;padding-left:18px;border-left:1px solid #daddd6;color:#92988c;font-size:13px;letter-spacing:2px}.detail-header-actions{display:flex;align-items:center;gap:25px}.detail-back,.share-trigger{display:inline-flex;gap:7px;align-items:center;color:#65715d;font-size:12px;text-decoration:none;background:transparent;padding:8px 0}.share-trigger{color:#263e2c;font-size:14px;font-weight:550}.detail-back:hover,.share-trigger:hover{color:#497c43}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;height:calc(100dvh - 68px);min-height:560px}.detail-primary{min-width:0;min-height:0;display:flex;flex-direction:column}.course-stage{position:relative;flex:1;min-height:0;background:#122e2c;border-radius:14px;isolation:isolate;overflow:hidden}.stage-image{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover;display:block}.fullscreen-button{display:inline-flex;align-items:center;gap:6px;position:absolute;right:19px;top:18px;z-index:5;background:#163b3280;color:#fff;padding:9px 12px;border:1px solid #ffffff30;border-radius:7px;font-size:13px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.fullscreen-button:hover{background:#163b32c0}.stage-start{position:absolute;bottom:66px;left:50%;transform:translate(-50%);text-align:center}.stage-start button{display:inline-flex;align-items:center;justify-content:space-between;gap:23px;min-width:270px;padding:19px 27px;border-radius:9px;background:#173f35f0;border:1px solid #dfe8a470;color:#fff1a1;font-family:Songti SC,"Noto Serif CJK SC",serif;font-weight:650;font-size:23px;letter-spacing:4px;box-shadow:0 8px 34px #061e2440;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:background .2s,transform .2s}.stage-start button:hover{background:#24594cee;transform:translateY(-3px)}.stage-start>span{display:block;margin-top:12px;color:#fffce5;font-size:11px;letter-spacing:2px;text-shadow:0 1px 6px #17332a}.stage-guide-toggle{position:absolute;z-index:3;right:25px;top:36%;display:flex;flex-direction:column;align-items:center;gap:17px;padding:22px 14px;background:#234a3ecf;border:1px solid #f3eea66b;border-radius:35px;color:#fff0a1;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.stage-guide-toggle>span{writing-mode:vertical-rl;font-family:Songti SC,"Noto Serif CJK SC",serif;font-size:16px;letter-spacing:5px}.stage-guide-toggle:hover{background:#2d584cd9}.stage-caption{position:absolute;bottom:23px;left:25px;display:flex;align-items:center;gap:10px;color:#fff;font-size:11px;text-shadow:0 1px 4px #102c2a}.stage-caption>span:first-child{background:#14332ac9;border:1px solid #fff4;border-radius:4px;padding:4px 7px}.stage-guide{position:absolute;z-index:4;top:80px;right:25px;width:min(330px,calc(100% - 50px));padding:23px;border-radius:13px;background:#fbfcf5f2;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid #f0f4e6;box-shadow:0 10px 30px #10352d2b}.stage-guide>div{display:flex;justify-content:space-between;align-items:center}.stage-guide h2{font-size:17px;margin:0}.stage-guide p{font-size:12px;color:#667961;line-height:1.85}.stage-guide ul{list-style:none;padding:0;margin:20px 0;display:grid;gap:12px}.stage-guide li{display:flex;align-items:center;gap:8px;font-size:12px;color:#4a6a47}.stage-guide>span{font-size:10px;color:#8a957d}.stage-activity{position:absolute;top:0;right:0;bottom:0;left:0;overflow-y:auto;display:flex;align-items:safe center;justify-content:center;padding:65px 28px 28px;background:#12342b50;-webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px)}.activity-panel{width:100%;max-width:580px;border-radius:18px;background:#fffffff7;padding:30px;box-shadow:0 12px 50px #12372a40}.activity-eyebrow{display:flex;align-items:center;gap:7px;font-size:12px;color:#6d8558}.activity-eyebrow>span{margin-left:auto;font-size:10px;background:#f1f5e7;padding:4px 7px;border-radius:4px}.activity-panel>h2{font-size:20px;line-height:1.6;margin:17px 0 0}.activity-panel .quiz-heading{margin-top:14px}.course-stage:fullscreen{width:100vw;height:100dvh;border-radius:0;background:#122e2c}.course-stage:fullscreen .stage-image{height:100%;object-fit:contain;object-position:center}.course-stage:fullscreen .activity-panel{max-width:680px}.creator-bar{flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:84px;padding-top:16px;padding-bottom:5px}.creator-profile{display:flex;gap:12px;align-items:center;min-width:0}.creator-profile>svg{color:#778a6e}.creator-profile>div{min-width:0}.creator-profile strong{font-size:16px;font-weight:650;display:flex;align-items:center;flex-wrap:wrap;gap:9px}.creator-profile strong>span{font-size:10px;color:#8e9887;font-weight:400}.creator-profile p{margin:7px 0 0;color:#8b9484;font-size:11px}.creator-actions{display:flex;align-items:center;gap:20px;flex-shrink:0}.creator-views,.creator-star{display:inline-flex;align-items:center;gap:5px;color:#5b6a53;font-size:13px;white-space:nowrap}.creator-star{background:transparent;padding:7px 0}.creator-star.is-saved{color:#839747}.save-course{font-size:12px;padding:11px 17px;min-height:42px}.course-info-panel{min-width:0;overflow-y:auto;overscroll-behavior:contain;padding:1px 10px 10px 0;scrollbar-width:thin;scrollbar-color:#d6dbd2 transparent}.info-section{padding-bottom:25px;margin-bottom:25px;border-bottom:1px solid #edf0e8}.course-info-panel h2{font-size:16px;font-weight:650;margin:0 0 20px}.detail-course-heading{display:flex;gap:14px;align-items:flex-start}.detail-course-heading>img{width:76px;height:76px;border-radius:19px;object-fit:cover;flex-shrink:0}.detail-course-heading h1{font-size:19px;line-height:1.6;font-weight:650;letter-spacing:0;margin:0 0 7px}.detail-course-heading p{font-size:11px;color:#8e9588;margin:0;line-height:1.8}.detail-properties{display:flex;align-items:center;gap:15px;margin-top:17px;font-size:10px;color:#819373}.detail-properties>span{display:inline-flex;align-items:center;gap:4px}.course-introduction>h2{margin-bottom:12px}.course-introduction p{font-size:13px;line-height:1.95;color:#64735a;margin:0}.related-heading{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.related-heading>span{font-size:10px;color:#a0a791}.related-list{display:grid;gap:17px}.related-course{display:flex;position:relative;gap:12px;text-decoration:none;color:var(--ink);border-radius:9px}.related-course:hover h3{color:#507e43}.related-course>img{width:135px;height:80px;object-fit:cover;border-radius:9px;flex-shrink:0}.related-course>div{flex:1;min-width:0}.related-course h3{margin:0 0 6px;font-size:14px;font-weight:550;line-height:1.5;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}.related-author{display:flex;align-items:center;gap:3px;font-size:10px;color:#8d9783}.related-stats{display:flex;gap:12px;margin-top:6px;color:#929d89;font-size:10px}.related-stats>span{display:flex;align-items:center;gap:3px}.related-arrow{display:none}.detail-data-note{font-size:10px;color:#9ba38f;line-height:1.8;margin-top:27px}.share-dialog{width:min(560px,calc(100vw - 32px))}.share-content{padding:35px 28px 23px}.share-content>svg{color:#718b5c}.share-content h2{font-size:21px;margin:20px 0 8px}.share-content>p{color:#839174;font-size:12px;line-height:1.85}.share-content label{display:block;font-size:12px;margin:24px 0 10px}.share-link-field{display:flex;gap:8px}.share-link-field input{min-width:0;flex:1;border:1px solid #dde5d5;border-radius:8px;padding:10px;color:#647957;background:#fafcf6;font-size:12px}.share-link-field .primary-button{flex-shrink:0;padding:10px 13px;font-size:12px}.share-content .share-tip{font-size:10px;margin:14px 0 0}.share-status{min-height:24px;font-size:11px;color:#6b834e;margin-top:7px}.detail-toast{left:50%}.course-not-found{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;text-align:center}.course-not-found>svg{color:#849b6f;margin-bottom:20px}.course-not-found h1{font-size:25px}.course-not-found p{font-size:13px;color:#8e9b80;margin-bottom:25px}.course-not-found a{text-decoration:none}@media(min-width:1800px){.detail-layout{grid-template-columns:minmax(0,1fr) 380px;gap:25px}.detail-course-heading>img{width:85px;height:85px}.detail-course-heading h1{font-size:21px}.related-course>img{width:150px;height:86px}.related-course h3{font-size:16px}}@media(max-width:1180px){.detail-layout{grid-template-columns:minmax(0,1fr) 300px;gap:18px}.related-course>img{width:112px;height:74px}.detail-course-heading>img{width:62px;height:62px;border-radius:14px}.detail-course-heading h1{font-size:17px}.creator-profile strong{font-size:14px}.creator-profile strong>span,.creator-views{display:none}.creator-actions{gap:12px}.save-course{padding:10px 12px}}@media(max-width:900px){.course-detail-page{padding:0 18px 20px}.detail-layout{display:block;height:auto;min-height:0}.course-stage{flex:none;height:min(65vw,520px);min-height:360px}.creator-bar{min-height:90px;margin-bottom:17px;border-bottom:1px solid #edf0e8;padding:14px 0 20px}.course-info-panel{overflow:visible;padding:0}.course-information{margin-bottom:20px;padding-bottom:20px}.detail-course-heading>img{width:67px;height:67px}.detail-course-heading h1{font-size:19px}.related-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.related-course>img{width:120px;height:77px}.stage-activity{padding:60px 20px 20px}}@media(max-width:600px){.course-detail-page{padding:0 14px 20px}.detail-topbar{height:61px;gap:10px}.detail-brand strong{font-size:21px}.detail-brand>span{display:none}.detail-header-actions{gap:19px}.detail-back{font-size:11px;gap:4px}.share-trigger{font-size:12px}.course-stage{height:calc((100vw - 28px)*.5625 + 136px);min-height:0;border-radius:12px}.stage-image{height:calc(100% - 136px);object-fit:contain;object-position:center top}.fullscreen-button{top:12px;right:12px;font-size:11px;padding:7px 9px}.stage-start{bottom:44px}.stage-start button{min-width:223px;font-size:21px;gap:15px;padding:14px 20px}.stage-start>span{font-size:10px}.stage-caption{left:16px;bottom:12px;font-size:10px}.stage-guide-toggle{left:auto;right:13px;top:auto;bottom:12px;flex-direction:row;border-radius:7px;gap:5px;padding:7px 9px}.stage-guide-toggle>span{writing-mode:horizontal-tb;letter-spacing:0;font-size:11px}.stage-guide{top:63px;right:13px;width:calc(100% - 26px);padding:19px}.stage-guide h2{font-size:16px}.creator-bar{gap:14px;flex-wrap:wrap;padding:18px 0}.creator-profile>svg{width:37px;height:37px}.creator-profile p{font-size:10px}.creator-actions{width:100%;justify-content:flex-end;gap:22px}.creator-views{display:inline-flex;margin-right:auto;font-size:12px}.creator-star{font-size:12px}.save-course{font-size:11px;min-height:38px}.course-info-panel h2{font-size:16px;margin-bottom:18px}.detail-course-heading h1{font-size:18px}.detail-course-heading p{font-size:10px}.detail-course-heading{gap:12px}.detail-properties{margin-top:16px;font-size:11px}.course-introduction p{font-size:13px}.related-list{grid-template-columns:minmax(0,1fr);gap:19px}.related-course>img{width:143px;height:88px}.related-course h3{font-size:14px}.related-author,.related-stats{font-size:11px}.stage-activity{padding:55px 12px 16px}.activity-panel{border-radius:12px;padding:20px 15px}.activity-panel>h2{font-size:16px}.activity-panel .quiz h3{font-size:14px}.activity-panel .quiz-option{font-size:12px}.share-content{padding:32px 21px 18px}.share-link-field{flex-direction:column}.share-link-field input{min-height:44px}}@media(max-width:360px){.detail-header-actions{gap:12px}.stage-start button{min-width:200px;font-size:19px}.related-course>img{width:119px;height:82px}}.live-platform a{color:inherit;text-decoration:none}.live-platform .category-pill{padding:9px 22px;border:0;border-radius:9px;background:transparent;color:#727a76;cursor:pointer}.live-platform .category-pill.active{background:#e1f0e9;color:#287456;font-weight:600}.live-toolbar{display:flex;justify-content:space-between;align-items:center;margin:28px 0 20px}.live-toolbar h2{font-size:19px;font-weight:600}.live-toolbar h2 span{margin-left:8px;color:#8b938e;font-size:13px;font-weight:400}.live-toolbar>button,.live-pagination button{border:1px solid #dfe7e2;border-radius:8px;background:#fff;padding:8px 18px;color:#426650;cursor:pointer}.live-cover{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,#e5f2eb,#f4eee0);color:#66917d}.live-platform .cover-button{display:block}.live-summary{color:#7a837c;font-size:13px;line-height:1.7;margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.live-empty{min-height:320px;display:flex;gap:18px;flex-direction:column;align-items:center;justify-content:center;color:#77877a;text-align:center;padding:32px}.live-empty h2{color:#445e4b;font-size:22px}.live-pagination{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:32px}.live-pagination button:disabled{opacity:.4;cursor:default}.admin-entry{display:block;padding:24px 12px;font-size:14px;color:#47715b}.live-stage{position:relative;overflow:hidden;border-radius:16px;background:#fff}.live-frame{display:block;width:100%;height:68vh;min-height:420px;border:none}.live-stage:fullscreen{border-radius:0}.live-stage:fullscreen .live-frame{height:100vh}.live-stage .fullscreen-button{z-index:2;background:#fffffff0;color:#395746}.live-detail-cover{width:100%;margin-top:20px;border-radius:12px}.live-hint{color:#7a837c;padding:20px;font-size:13px}@media(max-width:760px){.live-platform .sidebar{display:none}.live-platform .main-content{margin-left:0;padding:24px 16px}.live-platform .page-header{align-items:stretch;gap:20px;flex-direction:column}.live-platform .search-box{width:100%}.live-platform .course-grid{grid-template-columns:1fr}.live-platform .category-list{overflow:auto;flex-wrap:nowrap}.live-platform .category-pill{white-space:nowrap}}:root{--font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;--ink: #243027;--green: #192e24;--line: #eaf0e6;--sidebar-width: 238px}*{box-sizing:border-box}body{margin:0;min-width:320px;font-family:var(--font);color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}button,input,select{font:inherit;outline-offset:4px}button{cursor:pointer;color:inherit;border:0;-webkit-tap-highlight-color:transparent}button:disabled{cursor:default}:focus-visible{outline:2px solid #33795f}svg{flex-shrink:0}.icon-button{width:32px;height:32px;padding:0;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;background:transparent}.icon-button:hover{background:#eaf0ec}.skip-link{position:fixed;z-index:50;top:-100px;left:24px;padding:12px 18px;background:var(--green);color:#fff;border-radius:8px}.skip-link:focus{top:12px}.sidebar{width:var(--sidebar-width);height:100dvh;position:fixed;z-index:20;top:0;left:0;background:#fafbf9;border-right:1px solid var(--line);padding:27px 19px 0;display:flex;flex-direction:column;transition:width .2s}.brand-row{display:flex;align-items:center;justify-content:space-between;padding:0 9px}.brand{display:flex;align-items:center;gap:9px;background:transparent;padding:0}.brand>span{display:flex;align-items:center;gap:7px;font-size:28px;letter-spacing:-1px;font-weight:800}.brand-dot{font-size:10px;font-weight:650;letter-spacing:0;border:1px solid #cbd7ca;color:#526a58;border-radius:5px;padding:1px 4px}.brand-caption{color:#8b928d;font-size:11px;letter-spacing:1.5px;padding-left:11px;margin:13px 0 32px}.discover-button{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;min-height:46px;background:var(--green);color:#fff;border-radius:10px;font-weight:550;font-size:14px;margin-bottom:25px;transition:background .18s}.discover-button:hover,.primary-button:hover{background:#294d3e}.discover-button>svg:last-child{opacity:.65}.sidebar nav{display:grid;gap:8px}.nav-item{display:flex;align-items:center;gap:13px;text-align:left;width:100%;background:transparent;border-radius:9px;min-height:48px;padding:0 16px;font-size:14px;font-weight:550}.nav-item:hover{background:#f0f2ed}.nav-item.active{background:#eaf0e9;color:#234332}.nav-arrow{margin-left:auto;color:#9aa49b}.nav-count{margin-left:auto;font-size:11px;font-weight:600;background:#e4eade;min-width:21px;height:21px;border-radius:5px;text-align:center;padding:2px 5px}.sidebar-collection{border-top:1px solid var(--line);padding:26px 10px;margin-top:26px}.section-label{color:#9a9f97;font-size:11px;letter-spacing:1px}.sidebar-collection button{display:flex;align-items:center;gap:8px;padding:12px 0;background:transparent;width:100%;color:#758071;font-size:11px;text-align:left}.sidebar-collection button:first-of-type{margin-top:10px}.sidebar-collection button:hover{color:var(--green)}.sidebar-collection button svg:last-child{margin-left:auto}.sidebar-bottom{margin-top:auto}.sidebar-note{border:1px solid #e4eacb;background:#f1f5e6;padding:17px 14px;border-radius:11px;margin-bottom:21px}.sidebar-note>span{display:flex;gap:7px;align-items:center;color:#4a6038;font-weight:600;font-size:12px}.sidebar-note p{margin:11px 0 15px;font-size:11px;line-height:1.9;color:#829070}.sidebar-note button{display:flex;align-items:center;justify-content:space-between;width:100%;background:transparent;color:#536b3b;padding:0;font-size:11px}.profile{display:flex;align-items:center;gap:9px;padding:21px 4px 25px;border-top:1px solid var(--line)}.profile>svg{color:#869a7b}.profile strong{display:block;font-size:13px;font-weight:550}.profile div>span{display:block;margin-top:4px;font-size:10px;color:#999e98}.main-content{margin-left:var(--sidebar-width);max-width:1800px;padding:31px clamp(36px,5.8vw,114px) 24px}.page-header{display:flex;align-items:center;justify-content:space-between;gap:25px}.heading-line{display:flex;align-items:center;gap:14px}h1{font-size:30px;font-weight:700;letter-spacing:1px;margin:0;line-height:1.5}.heading-badge{font-size:10px;color:#667a56;background:#f0f4e7;padding:4px 8px;border-radius:5px;letter-spacing:.5px}.page-header p{margin:8px 0 0;font-size:12px;color:#92958e;letter-spacing:.25px}.search-box{display:flex;align-items:center;gap:9px;background:#f5f6f3;border:1px solid #eef0e9;border-radius:25px;width:286px;height:43px;padding:0 15px;color:#7d877e;flex-shrink:0}.search-box:focus-within{border-color:#98b196;box-shadow:0 0 0 3px #edf3e9}.search-box input{width:100%;min-width:0;padding:0;border:0;outline:none;background:transparent;font-size:12px}.search-box input::placeholder{color:#a0a59c}input[type=search]::-webkit-search-cancel-button{display:none}.search-box .icon-button{width:23px;height:23px;flex-shrink:0}.category-list{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:23px 0 15px}.category-chip{background:#f5f6f3;color:#7c837a;border:1px solid transparent;padding:9px 21px;border-radius:22px;display:inline-flex;align-items:center;gap:6px;font-size:13px;white-space:nowrap;transition:background .15s,color .15s}.category-chip:hover{background:#eaf0e5;color:#355941}.category-chip.selected{background:var(--green);color:#fff;font-weight:550}.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 13px;font-size:11px;color:#91988d}.result-summary{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.result-summary>span:first-child{color:#667060}.result-count{font-weight:600;color:#54654a;font-size:11px}.reset-filters{display:flex;align-items:center;gap:3px;font-size:10px;color:#557449;background:#f2f5ed;border-radius:4px;padding:2px 5px;margin-left:7px}.sort-control{display:flex;gap:8px;align-items:center;position:relative}.sort-control label{border-right:1px solid #e6e9e0;padding-right:9px}.sort-control select{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;background:transparent;border:0;padding:5px 19px 5px 2px;font-size:11px;color:#68735f}.sort-control svg{position:absolute;right:0;pointer-events:none}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px 20px}.course-card{min-width:0;border:1px solid #e8ece3;border-radius:15px;overflow:hidden;background:#fff;transition:box-shadow .2s,transform .2s,border-color .2s}.course-card:hover{border-color:#cbd7c4;box-shadow:0 6px 24px #243b2610;transform:translateY(-3px)}.cover-button{width:100%;aspect-ratio:16 / 9;display:block;position:relative;padding:0;overflow:hidden;background:#e9eee6;border-radius:14px}.course-cover{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}.course-card:hover .course-cover{transform:scale(1.035)}.hot-badge{position:absolute;top:12px;left:12px;display:flex;align-items:center;gap:3px;font-size:11px;font-weight:600;color:#f56d43;padding:4px 7px;border-radius:6px;background:#fffffff5}.view-count{display:flex;align-items:center;gap:4px;position:absolute;right:12px;top:13px;font-size:11px;color:#fff;text-shadow:0 1px 4px #000}.preview-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#071c1430;opacity:0;transition:opacity .2s}.cover-button:hover .preview-overlay,.cover-button:focus-visible .preview-overlay{opacity:1}.preview-overlay>span{display:flex;align-items:center;gap:7px;background:#ffffffed;padding:10px 17px;border-radius:24px;color:#1d3b2c;font-size:12px;box-shadow:0 2px 12px #0001}.card-content{display:flex;gap:10px;padding:13px 12px;align-items:center}.course-icon{flex-shrink:0;width:39px;height:39px;object-fit:cover;border-radius:11px}.card-info{min-width:0;flex:1}.card-info h2{margin:0 0 5px;font-size:14px;line-height:1.4;font-weight:600}.card-info h2 button{display:block;background:none;padding:0;max-width:100%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;text-align:left}.card-info h2 button:hover{color:#4d784e}.card-byline{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:11px;color:#74806b}.card-byline>span:first-child{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card-category{flex-shrink:0;background:#f2f5ed;padding:2px 5px;font-size:9px;color:#77846d;border-radius:3px}.favorite-button{display:inline-flex;margin-left:auto;flex-shrink:0;align-items:center;gap:3px;padding:4px 0 4px 10px;background:transparent;color:#92998b;font-size:10px}.favorite-button:hover{color:#697f42}.favorite-button.saved,.secondary-button.saved{color:#7a8c37}.catalog-footer{display:flex;align-items:center;justify-content:center;gap:10px;color:#a0a791;font-size:10px;margin:34px 0 28px}.footer-line{background:#ecefe7;height:1px;width:39px}.page-note{text-align:center;color:#a8afa2;font-size:9px}.page-note>span{margin:0 8px}.empty-state{min-height:380px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;border:1px dashed #e3e8dc;border-radius:16px;background:#fcfdf9;padding:40px 24px}.empty-state>svg{color:#97aa89}.empty-state h2{font-size:20px;margin:21px 0 0}.empty-state p{font-size:13px;line-height:1.9;color:#8b9483;margin:12px 0 25px}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 20px;border-radius:9px;font-size:13px;font-weight:550;min-height:44px}.primary-button{background:var(--green);color:#fff}.secondary-button{background:#f4f6ef;border:1px solid #e6eadf}.secondary-button:hover{background:#eaf0e2}.modal{width:min(650px,calc(100vw - 40px));max-height:calc(100dvh - 48px);padding:0;border:1px solid #dce3d7;border-radius:19px;box-shadow:0 20px 100px #0e24142b;color:var(--ink);overflow:auto}.modal::backdrop{background:#0e1b1869;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-inner{position:relative}.modal-close{position:absolute;top:13px;right:13px;z-index:2;background:#ffffffed;border:1px solid #d7dece;width:34px;height:34px;border-radius:50%}.category-label{padding:4px 10px;border-radius:5px;background:#edf3e5;color:#587745}.quiz-heading{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#94a087;margin-top:22px}.text-button{display:inline-flex;align-items:center;gap:4px;padding:4px 0;background:transparent;color:#677f53;font-size:11px}.quiz h3{font-size:16px;line-height:1.8;margin:17px 0}.quiz-options{display:grid;gap:9px}.quiz-option{display:flex;gap:12px;align-items:center;padding:11px 13px;border:1px solid #e1e7d9;border-radius:9px;background:#fbfcf8;text-align:left;font-size:13px;min-height:47px}.quiz-option>span{color:#758a63;font-size:11px;background:#eef3e6;padding:4px 7px;border-radius:5px}.quiz-option>svg{margin-left:auto}.quiz-option:not(:disabled):hover{border-color:#95ac7e;background:#f2f6ea}.quiz-option.correct{border-color:#82a45e;background:#f0f8e7;color:#587535}.quiz-option.incorrect{border-color:#d4aa92;background:#fcf3ec;color:#9b6954}.answer-feedback{border-radius:10px;margin-top:18px;background:#faf5ed;padding:15px}.answer-feedback.is-correct{background:#f0f7e9}.answer-feedback strong{display:flex;align-items:center;gap:7px;font-size:12px;color:#677b4f}.answer-feedback p{font-size:12px;line-height:1.9;color:#7c846f;margin:8px 0}.help-dialog{width:min(500px,calc(100vw - 40px))}.help-content{padding:38px 32px 30px}.help-icon{display:inline-flex;padding:12px;border-radius:14px;background:#edf3e3;color:#6e8752}.help-content h2{font-size:22px;margin:23px 0 10px}.help-content>p{font-size:12px;color:#94a083}.help-content ol{padding-left:22px;margin:25px 0}.help-content li{color:#758c5d;padding-left:5px;margin-bottom:19px;font-size:12px}.help-content li strong{display:block;color:#43573a;margin-bottom:6px;font-size:13px}.help-content li span{color:#89987a;line-height:1.9}.help-note{color:#8e9b80;font-size:11px;line-height:1.8;border-top:1px solid #ebefe3;padding:17px 0 22px}.help-content .primary-button{width:100%}.toast{position:fixed;z-index:100;bottom:25px;left:calc(50% + var(--sidebar-width) / 2);transform:translate(-50%);display:flex;align-items:center;gap:9px;max-width:calc(100vw - 30px);padding:14px 19px;border-radius:12px;background:#233c2c;color:#fff;box-shadow:0 6px 25px #203a2026;font-size:12px}.mobile-brand,.mobile-close,.sidebar-backdrop{display:none}.sidebar-collapsed{--sidebar-width: 80px}.sidebar-collapsed .sidebar{padding:27px 12px 0}.sidebar-collapsed .brand-row{flex-direction:column;gap:20px;padding:0;margin-bottom:22px}.sidebar-collapsed .brand>span,.sidebar-collapsed .brand-caption,.sidebar-collapsed .discover-button,.sidebar-collapsed .nav-item>span,.sidebar-collapsed .nav-arrow,.sidebar-collapsed .sidebar-collection,.sidebar-collapsed .sidebar-note,.sidebar-collapsed .profile>div{display:none}.sidebar-collapsed .nav-item{justify-content:center;padding:12px}.sidebar-collapsed .profile{justify-content:center}@media(min-width:1700px){:root{--sidebar-width: 270px}.sidebar{padding-left:24px;padding-right:24px}.main-content{padding-top:44px}h1{font-size:34px}.category-list{margin-top:32px}.category-chip{font-size:15px}.card-info h2{font-size:16px}.card-content{padding:16px}.card-byline,.favorite-button{font-size:12px}.course-grid{gap:26px 24px}}@media(max-width:1200px){:root{--sidebar-width: 210px}.main-content{padding:35px 32px 25px}.sidebar{padding-left:14px;padding-right:14px}.brand-dot,.heading-badge{display:none}.search-box{width:245px}.course-grid{gap:19px 16px}.course-icon{width:32px;height:32px;border-radius:9px}.card-content{gap:8px;padding-left:10px;padding-right:10px}.card-info h2{font-size:12px}.card-category{display:none}}@media(max-width:1000px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-header{align-items:flex-start;flex-direction:column;gap:19px}.search-box{width:100%;max-width:450px}.category-list{gap:8px;margin-top:25px}.category-chip{padding:9px 17px}.card-info h2{font-size:13px}}@media(max-width:700px){:root,.sidebar-collapsed{--sidebar-width: 0px}.sidebar,.sidebar-collapsed .sidebar{width:250px;visibility:hidden;transform:translate(-100%);padding:27px 20px 0;transition:transform .2s,visibility .2s}.sidebar.mobile-open{visibility:visible;transform:translate(0)}.sidebar-collapsed .brand-row{flex-direction:row;margin-bottom:0}.sidebar-collapsed .brand>span,.sidebar-collapsed .brand-caption,.sidebar-collapsed .nav-item>span,.sidebar-collapsed .profile>div{display:block}.sidebar-collapsed .discover-button{display:flex}.sidebar-collapsed .nav-item,.sidebar-collapsed .profile{justify-content:flex-start}.collapse-button{display:none}.mobile-close{display:inline-flex}.sidebar-backdrop{display:block;position:fixed;z-index:19;top:0;right:0;bottom:0;left:0;background:#0e241553}.mobile-brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:750;margin-bottom:27px}.mobile-brand>svg{margin-left:auto;color:#8e9f73}.mobile-brand>button{margin-left:-6px}.main-content{padding:20px 23px 25px}h1{font-size:27px}.page-header p{font-size:11px;margin-top:7px}.page-header{gap:21px}.search-box{max-width:none;height:44px}.category-list{flex-wrap:nowrap;overflow-x:auto;margin:23px -23px 18px;padding:0 23px 5px;scrollbar-width:none;gap:8px}.category-list::-webkit-scrollbar{display:none}.category-chip{flex-shrink:0;font-size:12px;padding:9px 18px}.catalog-toolbar{margin-bottom:16px}.sort-control label{display:none}.course-grid{gap:20px 16px}.card-content{padding-top:12px}.card-info h2{font-size:14px}.card-byline,.favorite-button{font-size:11px}.course-icon{width:38px;height:38px}.card-category{display:block}.toast{width:max-content;max-width:calc(100vw - 36px);left:50%;font-size:11px}.help-content{padding:32px 24px 24px}}@media(max-width:480px){.course-grid{grid-template-columns:minmax(0,1fr)}.card-info h2{font-size:14px}.card-content{padding:14px}.course-icon{width:41px;height:41px}.hot-badge,.view-count{font-size:12px}.modal{width:calc(100vw - 24px);max-height:calc(100dvh - 24px)}.empty-state{min-height:330px}}@media(max-height:750px)and (min-width:701px){.sidebar-collection{margin-top:18px;padding-top:20px}.sidebar-note{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}