:root{--ink:#293851;--slate:#5f708d;--muted:#8a96aa;--blue:#657baf;--blue-dark:#4f6598;--cream:#f2e9dd;--line:#dde4ef;--page:#f2f5fa;--serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC","STSong",serif;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--page);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #9aaede;outline-offset:4px}button svg,a svg{pointer-events:none}button{border:0}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}img{display:block;max-width:100%}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;left:20px;top:-80px;z-index:100;padding:10px 20px;background:var(--ink);color:#fff;border-radius:8px}.skip-link:focus{top:15px}.sidebar{position:fixed;inset:0 auto 0 0;width:232px;background:linear-gradient(165deg,#f7f9fc,#e9eef8);border-right:1px solid rgba(111,132,172,.12);padding:39px 24px 24px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;gap:13px;align-items:center;padding-left:9px}.brand>span:last-child{font-size:23px;font-family:var(--serif);font-weight:700;letter-spacing:4px}.brand small{display:block;font-family:var(--sans);font-size:7px;letter-spacing:1.6px;color:#8a9ab4;margin-top:3px;font-weight:400}.brand-mark{position:relative;width:28px;height:34px;display:flex;align-items:center;gap:4px;transform:rotate(-10deg)}.brand-mark i{height:24px;width:6px;display:block;border-radius:7px;background:#6c81ad}.brand-mark i:nth-child(2){height:33px;background:#a3b3cf}.brand-mark i:nth-child(3){height:18px;background:#c6ae90}.sidebar-divider{height:1px;background:#dfe6f0;margin:32px 12px}.nav-caption{font-size:10px;color:#9aa7ba;letter-spacing:2px;margin:0 14px 15px}.side-nav{display:flex;flex-direction:column;gap:8px}.nav-item{display:flex;align-items:center;width:100%;gap:13px;border-radius:11px;padding:13px 15px;background:transparent;color:#8a98b0;text-align:left;font-size:13px;transition:background .2s,color .2s}.nav-item:hover{background:rgba(255,255,255,.65)}.nav-item.active{background:#fff;color:#5d73a2;box-shadow:0 4px 18px #415b8910}.nav-item svg{width:19px;height:19px}.nav-dot{margin-left:auto;width:5px;height:5px;border-radius:50%;background:#aab9d3}.nav-count{margin-left:auto;color:#9ba8be;font-size:11px}.side-note{margin:auto 16px 55px;padding-top:60px}.little-star{color:#bea17e;font-size:23px;display:block;margin-bottom:20px}.side-note p{font-family:var(--serif);font-size:20px;line-height:2;letter-spacing:2px;color:#6a7b99;margin:0 0 21px}.side-note-rule{display:block;width:22px;height:1px;background:#c4d0e1;margin-bottom:18px}.side-note small{font-size:10px;letter-spacing:2px;color:#a7b1c2}.sidebar-footer{font-size:10px;color:#a2aec2;display:flex;align-items:center;gap:8px;justify-content:center;letter-spacing:1px}.small-orbit{width:10px;height:10px;border:1px solid #a7b6ce;border-radius:50%;position:relative}.small-orbit:after{content:"";width:3px;height:3px;background:#bfa485;border-radius:50%;position:absolute;top:-2px;right:0}.site-main{margin-left:232px;min-height:100vh}.topbar{height:84px;border-bottom:1px solid #e0e6ef;display:flex;align-items:center;justify-content:space-between;padding:0 5.1%;color:#9ca8ba;font-size:11px}.breadcrumb{display:flex;gap:18px;align-items:center}.desktop-wordmark{letter-spacing:1.8px;color:#8091ad;font-size:10px}.mobile-wordmark{display:none}.breadcrumb-divider{color:#c5cedc}.topbar-right{display:flex;gap:9px;align-items:center;letter-spacing:1px}.quiet-dot{width:5px;height:5px;background:#c4ad8d;border-radius:50%}.mobile-save{display:none}main{max-width:1440px;margin:auto;padding:38px 5.1% 0}.page-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:27px}.eyebrow{font-size:8px;letter-spacing:2.6px;color:#9eacc0;margin:0 0 9px}h1,h2,h3,p{margin-top:0}.page-heading h1{font-size:30px;font-family:var(--serif);font-weight:600;letter-spacing:4px;line-height:1.4;margin:0}.heading-dot{color:#bba180;font-family:Georgia,serif;margin-left:3px}.heading-note{color:#a4aebe;font-size:11px;letter-spacing:1px;padding-bottom:5px}.hero{height:318px;border-radius:18px;overflow:hidden;position:relative;background:#dfe6f1;isolation:isolate;box-shadow:0 10px 32px #5e7baf09;border:1px solid #e9eef6}.hero-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 44%;z-index:-3;opacity:.87}.hero-wash{position:absolute;inset:0;background:linear-gradient(90deg,rgba(232,237,247,.98),rgba(232,237,247,.84) 25%,rgba(232,237,247,.18) 66%,rgba(228,233,244,.04)),linear-gradient(0deg,rgba(231,235,245,.4),transparent 65%);z-index:-2}.hero-content{padding:34px 41px;position:relative}.hero-kicker{font-size:10px;letter-spacing:2px;color:#8a9bb8;display:flex;align-items:center;gap:8px;margin-bottom:15px}.hero-kicker>span{width:19px;height:1px;background:#bda17f}.hero h2{font-family:var(--serif);font-weight:500;font-size:35px;letter-spacing:4px;line-height:1.6;margin:0 0 13px;color:#3d4e6d}.hero p{font-size:11px;color:#8594ae;line-height:1.9;letter-spacing:1px;margin:0 0 20px}.button{display:inline-flex;align-items:center;justify-content:center;gap:21px;border-radius:7px;padding:11px 20px;font-size:11px;font-weight:500;letter-spacing:.5px;transition:transform .2s,background .2s;min-height:39px}.button:hover{transform:translateY(-1px)}.button-primary{background:#6179aa;color:#fff;box-shadow:0 4px 10px #455f9120}.button-primary:hover{background:#516b9d}.button-soft{background:#e9eef6;color:#61769c}.button-outline{border:1px solid #dce3ee;background:#fff;color:#7384a0}.hero .button{padding:10px 18px;min-height:37px}.hero-footnote{position:absolute;bottom:25px;right:28px;display:flex;align-items:center;gap:12px;font-size:7px;letter-spacing:1.7px;color:#7d8da8}.hero-footnote-line{height:1px;width:29px;background:#a9b4c7}.library{margin-top:39px;scroll-margin-top:30px}.library-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:21px}.section-kicker{font-size:9px;letter-spacing:1px;color:#a2adbf;display:block;margin-bottom:5px}.library h2{font-size:19px;letter-spacing:1px;font-weight:550;margin:0}.catalogue-count{color:#a1adbf;font-size:10px;display:flex;gap:4px;align-items:center;padding-bottom:4px}.catalogue-count>span{color:#7389ae;font-weight:600}.catalogue-count i{height:10px;width:1px;background:#d6deea;margin:0 7px}.tab-row{border-bottom:1px solid #dce4ef;display:flex;justify-content:space-between;align-items:center}.tabs{display:flex;gap:29px}.tab{position:relative;background:transparent;color:#99a6ba;font-size:12px;letter-spacing:.5px;padding:10px 0 14px}.tab.active{color:#5c72a0;font-weight:600}.tab.active:after{content:"";position:absolute;bottom:-1px;left:3px;right:3px;height:2px;background:#7b91bc;border-radius:3px}.text-button{background:transparent;padding:7px 0;color:#8b9bb6;font-size:10px;display:inline-flex;align-items:center;gap:10px}.text-button:hover{color:#506b9e}.reset-filters{color:#9b8b7c}.filters{display:flex;gap:10px;margin:18px 0 13px;align-items:center}.search-field{display:flex;align-items:center;gap:11px;padding:10px 14px;background:#fff;border:1px solid #e3e8f1;border-radius:8px;flex:1;min-width:130px;height:42px;box-shadow:0 2px 8px #546d9c03}.search-field svg{color:#9baac1;width:17px;height:17px;flex-shrink:0}.search-field input{border:0;outline:0;background:transparent;width:100%;min-width:0;font-size:11px;color:#596d91;padding:0;line-height:20px}.search-field input::placeholder{color:#b1bacb}.search-field:focus-within{border-color:#9caed1;box-shadow:0 0 0 2px #a7b8d52b}.search-field input:focus-visible{outline:none}.search-field kbd{color:#bec6d4;border:1px solid #e5eaf1;font:10px var(--sans);padding:0 5px;line-height:18px;border-radius:4px}.select-field{position:relative}.select-field:after{content:"";width:5px;height:5px;border-right:1px solid #a5b0c3;border-bottom:1px solid #a5b0c3;transform:rotate(45deg);position:absolute;right:13px;top:17px;pointer-events:none}.select-field select{appearance:none;-webkit-appearance:none;border:1px solid #e0e6ef;background:#fff;border-radius:8px;font-size:10px;color:#8595b0;padding:10px 29px 10px 14px;min-width:102px;height:42px}.sort-field select{min-width:105px}.catalogue-notice{padding:7px 10px;border-radius:7px;color:#a18d73;font-size:10px;background:#f6f0e6a8;line-height:1.8;margin-bottom:18px}.loading-state{display:flex;justify-content:center;align-items:center;gap:12px;padding:75px 0;color:#93a2b9;font-size:12px}.spinner{width:19px;height:19px;border:2px solid #dce4ef;border-top-color:#8399c1;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.results-section{margin-top:27px}.results-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.results-heading h3{font-size:14px;font-weight:550;letter-spacing:1px;display:flex;align-items:center;gap:9px;margin:0}.section-stroke{height:15px;width:3px;border-radius:2px;background:#c9af8d}.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.course-card{min-width:0;position:relative;border-radius:12px;background:#fff;border:1px solid #e5eaf3;overflow:hidden;box-shadow:0 5px 14px #51668e04;transition:box-shadow .25s,transform .25s,border-color .25s}.course-card:hover{transform:translateY(-3px);box-shadow:0 10px 22px #526c9c11;border-color:#cad7ed}.card-open{display:block}.course-cover{margin:8px 8px 0;position:relative;aspect-ratio:16/9;border-radius:7px;overflow:hidden;background:#dce4f0}.course-cover img{height:100%;width:100%;object-fit:cover;transition:transform .45s}.course-card:hover .course-cover img{transform:scale(1.035)}.course-cover:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,#182d514d,transparent 58%);pointer-events:none}.cover-type{position:absolute;top:9px;left:9px;z-index:1;background:#ffffffeb;color:#7085a9;font-size:8px;padding:2px 7px;border-radius:4px;backdrop-filter:blur(5px);letter-spacing:.5px}.cover-type.partial{color:#9b855e;background:#fff8ebe8}.cover-count{position:absolute;bottom:9px;left:10px;color:#fff;z-index:1;font-size:9px;text-shadow:0 1px 3px #25344e33}.cover-play{position:absolute;right:11px;bottom:10px;z-index:1;border:1px solid #ffffffa6;background:#ffffff26;backdrop-filter:blur(4px);width:29px;height:29px;border-radius:50%;display:flex;align-items:center;justify-content:center}.cover-play svg{width:12px;height:12px;fill:#fff;stroke:#fff;transform:translateX(1px)}.bookmark-button{position:absolute;top:17px;right:17px;z-index:2;width:27px;height:27px;display:flex;align-items:center;justify-content:center;border:1px solid #ffffff80;border-radius:50%;background:#ffffffec;color:#95a5bc;transition:color .2s,background .2s}.bookmark-button svg{width:12px;height:12px;stroke-width:1.8}.bookmark-button:hover,.bookmark-button.saved{background:#f1e7d8;color:#aa8a62}.bookmark-button.saved svg{fill:#c8af8d;stroke:#a68c6c}.course-body{padding:12px 14px 14px}.course-title{font-size:12px;line-height:1.65;font-weight:550;margin:0;min-height:39.6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:#425471}.course-summary{font-size:9px;line-height:1.8;margin:6px 0 11px;min-height:32.4px;color:#a1adbf;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-tags{display:flex;align-items:center;justify-content:space-between;gap:7px}.tag-set{display:flex;gap:5px;min-width:0}.tag{background:#eef2f9;color:#8294b4;font-size:8px;padding:2px 6px;border-radius:4px;white-space:nowrap}.tag.grade{background:#f5f3ef;color:#ae9d87}.platform{font-size:8px;color:#a5b0c2;white-space:nowrap}.course-byline{display:flex;align-items:center;gap:5px;margin-top:10px;font-size:8px;color:#a5b1c4;min-width:0}.author-dot{width:12px;height:12px;border-radius:50%;background:#e4eaf4;display:flex;justify-content:center;align-items:center;font-size:6px;color:#8a9dba;flex-shrink:0}.course-author{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.heat-meta{margin:7px 0 0;color:#91a1bb;font-size:8px;line-height:1.6}.articles-section{margin-top:34px}.article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.article-card{position:relative;background:#fff;border:1px solid #e5eaf3;border-radius:11px;overflow:hidden;transition:box-shadow .2s,transform .2s}.article-card:hover{box-shadow:0 8px 20px #526c9c0e;transform:translateY(-2px)}.article-open{padding:13px;display:flex;gap:14px;align-items:center;min-height:139px}.article-cover{width:106px;height:107px;object-fit:cover;border-radius:7px;flex-shrink:0;background:#e3e9f2}.article-body{min-width:0;padding-right:18px}.article-title{font-family:var(--serif);font-size:14px;font-weight:550;line-height:1.6;margin:0 0 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:#435471}.article-summary{font-size:9px;color:#a4aec0;line-height:1.7;margin:0 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.article-meta{font-size:8px;color:#9aabc4;display:flex;gap:7px;align-items:center}.article-meta .tag{font-size:7px}.article-card .bookmark-button{top:11px;right:10px;width:23px;height:23px;border-color:#e7ecf3;background:#f5f7fb}.article-card .bookmark-button.saved{background:#f1e7d8}.article-author{margin-top:6px;font-size:8px;color:#a9b4c5;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.state-card{text-align:center;padding:63px 20px;margin:24px 0;background:#ffffff8c;border:1px solid #fff;border-radius:13px}.state-illustration{font-family:Georgia,serif;display:block;font-size:33px;line-height:1;color:#b3c1d8;margin-bottom:20px}.state-card h3{font-weight:500;font-size:16px;letter-spacing:1px;margin:0 0 9px}.state-card p{font-size:12px;color:#9ba8bc;margin:0 0 20px}.results-footer{display:flex;align-items:center;justify-content:center;gap:15px;margin:46px 0 36px}.results-footer>span{height:1px;width:30px;background:#dbe2ed}.results-footer p{color:#adb8c9;font-size:9px;letter-spacing:1px;margin:0}.site-footer{max-width:1440px;margin:48px auto 0;padding:22px 5.1% 25px;border-top:1px solid #e0e6ef;color:#a2aec0;display:flex;justify-content:space-between;font-size:9px;letter-spacing:.7px}.site-footer a{font-family:var(--serif);font-size:12px;color:#8f9fb9}.site-footer a span{font-family:var(--sans);font-size:9px;color:#abb5c6}.toast{position:fixed;bottom:29px;left:calc(50% + 116px);transform:translateX(-50%);padding:11px 19px;background:#344562ed;backdrop-filter:blur(8px);color:#f1f5fc;border-radius:9px;z-index:50;font-size:12px;box-shadow:0 7px 20px #263c5d20;max-width:calc(100% - 40px);text-align:center}.detail-nav{display:flex;justify-content:space-between;align-items:center;margin:1px 0 24px;gap:16px}.back-link{font-size:12px;color:#8395b4;display:flex;align-items:center;gap:9px}.back-link svg{width:16px;height:16px}.detail-breadcrumb{font-size:10px;color:#a3aec0;white-space:nowrap}.watch-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:22px}.watch-heading h1{font-size:22px;letter-spacing:.5px;font-weight:550;line-height:1.65;margin:0 0 10px;max-width:850px}.watch-meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:10px;color:#9aa8be}.watch-meta .source-badge{color:#8098bf;background:#e9eff8;padding:3px 7px;border-radius:4px}.detail-save{display:inline-flex;align-items:center;gap:7px;flex-shrink:0;padding:8px 12px;color:#8b9bb4;border:1px solid #dce4f0;background:#f9fbfe;border-radius:7px;font-size:10px;margin-top:4px}.detail-save svg{width:14px;height:14px}.detail-save.saved{background:#f4ebdd;color:#a58a65;border-color:#e8d9c3}.detail-save.saved svg{fill:#d0b996;stroke:#ad936e}.watch-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:22px;align-items:start}.watch-main{min-width:0}.player-frame{position:relative;aspect-ratio:16/9;width:100%;background:#1b2436;border-radius:12px;overflow:hidden;box-shadow:0 8px 23px #4055790c}.player-frame iframe{width:100%;height:100%;border:0;display:block;position:relative;z-index:2}.player-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:15px;color:#aebcd2;font-size:12px;z-index:3;pointer-events:none;background:#1d283cf5}.player-loading .spinner{border-color:#3b4b63;border-top-color:#b6c5de;width:25px;height:25px}.player-unavailable{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center;color:#bbc8dc;font-size:12px;gap:16px}.player-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 1px}.player-status{font-size:9px;color:#a0adc2;min-width:0}.player-actions{display:flex;gap:14px;align-items:center;flex-shrink:0}.player-actions button,.player-actions a{background:transparent;padding:3px 0;color:#8398ba;font-size:9px}.danmaku-option{display:flex;align-items:center;gap:5px;font-size:9px;color:#91a3bd;cursor:pointer}.danmaku-option input{accent-color:#6c83b2;width:12px;height:12px;margin:0}.lesson-current{border-top:1px solid #dde5f0;margin-top:4px;padding-top:17px}.lesson-eyebrow{font-size:9px;color:#b29d81;letter-spacing:1px;margin-bottom:5px}.lesson-current h2{font-size:16px;font-weight:500;line-height:1.6;margin:0}.course-description{margin-top:24px;border:1px solid #e3e9f2;border-radius:11px;background:#ffffff89;padding:22px 24px}.course-description h3{font-size:12px;font-weight:550;margin:0 0 12px;letter-spacing:1px}.course-description p{font-size:11px;color:#96a4ba;line-height:1.95;margin:0;white-space:pre-line;overflow-wrap:anywhere}.course-description .original-source{display:inline-flex;margin-top:15px;color:#8399bc;font-size:10px;gap:9px;align-items:center}.lesson-panel{background:#fff;border:1px solid #e1e8f3;border-radius:12px;overflow:hidden}.lesson-panel-heading{padding:18px 17px 14px;border-bottom:1px solid #edf1f7;display:flex;align-items:center;justify-content:space-between;gap:7px}.lesson-panel-heading h2{font-size:13px;letter-spacing:.5px;font-weight:550;margin:0}.lesson-panel-heading span{font-size:9px;color:#a5b1c4}.lesson-list{max-height:430px;overflow:auto;padding:9px;scrollbar-width:thin;scrollbar-color:#d5deec transparent}.lesson-list::-webkit-scrollbar{width:4px}.lesson-list::-webkit-scrollbar-thumb{background:#d5deec;border-radius:4px}.lesson-item{width:100%;display:flex;align-items:flex-start;gap:10px;text-align:left;padding:11px 9px;border-radius:7px;color:#95a3bb;background:transparent;margin:2px 0;font-size:10px;line-height:1.7}.lesson-item:hover{background:#f5f7fb}.lesson-item.selected{background:#edf2fa;color:#617eae}.lesson-number{font-size:9px;color:#b0bdd0;min-width:21px;padding-top:1px}.lesson-item.selected .lesson-number{color:#6f8aba}.lesson-info{flex:1;min-width:0}.lesson-title{display:block;overflow-wrap:anywhere}.lesson-duration{font-size:8px;display:block;color:#b4bfd0;margin-top:3px}.lesson-indicator{width:11px;height:11px;display:flex;gap:2px;align-items:center;flex-shrink:0;margin-top:5px}.lesson-indicator i{width:2px;background:#a3b6d7;height:6px}.lesson-indicator i:nth-child(2){height:11px}.lesson-indicator i:nth-child(3){height:8px}.lesson-note{padding:11px 17px;border-top:1px solid #edf1f7;color:#abb6c8;font-size:9px;background:#fafbfd}.article-detail{max-width:790px;margin:0 auto}.article-detail-banner{height:200px;border-radius:13px;overflow:hidden;position:relative;margin-bottom:29px;background:#dde6f2}.article-detail-banner img{width:100%;height:100%;object-fit:cover;object-position:center 53%;opacity:.8}.article-detail-banner:after{position:absolute;inset:0;content:"";background:linear-gradient(90deg,#e4eaf4a3,transparent)}.article-detail-label{color:#b39c7c;font-size:10px;letter-spacing:1.8px;margin:0 0 12px}.article-detail h1{font-family:var(--serif);font-size:29px;line-height:1.75;font-weight:550;margin:0 0 19px;letter-spacing:1px}.article-detail .watch-meta{padding-bottom:23px;border-bottom:1px solid #dde4ee}.article-preview{padding:28px 0 7px;font-family:var(--serif);font-size:17px;color:#687c9e;line-height:2.2;white-space:pre-line;overflow-wrap:anywhere}.article-preview p{margin:0 0 23px}.article-preview h2{font-family:var(--sans);font-size:13px;margin:26px 0 10px;color:#8193af;font-weight:500}.article-source-card{padding:25px 27px;margin-top:12px;border:1px solid #e5dfd7;background:linear-gradient(115deg,#f5f0e8,#f9f8f5);border-radius:11px;display:flex;align-items:center;justify-content:space-between;gap:22px}.article-source-card h2{font-size:13px;letter-spacing:1px;font-weight:500;margin:0 0 5px;color:#8d7f70}.article-source-card p{font-size:10px;color:#b0a392;line-height:1.8;margin:0}.article-source-card .button{flex-shrink:0;background:#b8a184;color:#fff}.article-detail-actions{display:flex;justify-content:flex-end;margin:19px 0}.article-detail-actions .detail-save{margin:0}.noscript-note{position:fixed;inset:auto 0 0;background:#fff3d9;padding:20px;text-align:center;z-index:100} @media(min-width:1600px){main{padding-top:45px}.hero{height:352px}.hero-content{padding:38px 48px}.hero h2{font-size:40px}.hero p{font-size:12px}.hero-kicker{font-size:11px}.hero .button{font-size:12px}.course-title{font-size:14px;min-height:46.2px}.course-summary{font-size:11px;min-height:39.6px}.course-body{padding:15px 17px 17px}.tag,.course-byline,.heat-meta,.platform{font-size:10px}.cover-type,.cover-count{font-size:10px}.course-byline{margin-top:14px}.article-title{font-size:16px}.article-summary{font-size:11px}.article-meta,.article-author{font-size:10px}.article-meta .tag{font-size:9px}.article-cover{width:125px;height:121px}.article-open{min-height:151px}.topbar{height:94px}.filters{margin-top:22px}.search-field input,.select-field select{font-size:12px}.select-field select{min-width:116px}.tab{font-size:13px}.results-heading h3{font-size:16px}.text-button{font-size:12px}}
@media(max-width:1200px){.sidebar{width:200px;padding:33px 18px 22px}.brand{gap:10px;padding-left:5px}.brand>span:last-child{font-size:21px;letter-spacing:3px}.brand small{font-size:6px}.site-main{margin-left:200px}.topbar{padding-left:4%;padding-right:4%}main{padding-left:4%;padding-right:4%}.hero-content{padding-left:31px}.hero{height:306px}.hero h2{font-size:32px}.hero-footnote{right:20px;font-size:6px}.video-grid{gap:14px}.course-body{padding:11px 12px 13px}.article-grid{gap:12px}.article-open{gap:11px;padding:11px}.article-cover{width:85px;height:102px}.article-title{font-size:12px}.article-body{padding-right:9px}.article-card .bookmark-button{top:8px;right:8px;width:21px;height:21px}.watch-layout{grid-template-columns:minmax(0,1fr) 245px;gap:18px}.lesson-list{max-height:395px}.watch-heading h1{font-size:20px}.toast{left:calc(50% + 100px)}}
@media(max-width:1020px){.sidebar{width:174px;padding-left:14px;padding-right:14px}.brand{gap:9px}.brand>span:last-child{font-size:19px;letter-spacing:2px}.brand-mark{width:24px;gap:3px}.brand-mark i{width:5px}.brand small{letter-spacing:1.1px;font-size:5.5px}.site-main{margin-left:174px}.nav-item{padding:12px 11px;gap:10px;font-size:12px}.nav-caption{font-size:9px;letter-spacing:1px;margin-left:11px}.side-note{margin-left:14px;margin-right:8px}.side-note p{font-size:17px}.side-note small{font-size:8px}.sidebar-footer{font-size:8px}.topbar{height:73px}.topbar-right{font-size:9px}.hero{height:290px}.hero h2{font-size:29px}.hero-content{padding:27px}.hero p{font-size:10px}.hero-kicker{font-size:9px}.hero-footnote{font-size:5px;gap:7px;bottom:20px}.page-heading h1{font-size:27px}.heading-note{font-size:10px}.video-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.course-title{font-size:13px;min-height:42.9px}.course-summary{font-size:10px;min-height:36px}.course-byline,.heat-meta{font-size:9px}.course-cover{margin:9px 9px 0}.course-body{padding:13px 15px 15px}.tag{font-size:9px}.cover-count{font-size:10px}.article-grid{grid-template-columns:1fr}.article-cover{width:124px;height:113px}.article-title{font-size:15px}.article-summary{font-size:11px}.article-meta,.article-author{font-size:9px}.article-open{padding:13px;gap:18px}.article-body{padding-right:20px}.article-card .bookmark-button{top:12px;right:12px;width:25px;height:25px}.filters{flex-wrap:wrap;gap:8px}.search-field{flex-basis:100%;height:43px}.select-field{flex:1}.select-field select{width:100%;font-size:11px;height:38px}.select-field:after{top:15px}.catalogue-count{font-size:9px}.library h2{font-size:17px}.results-heading h3{font-size:13px}.watch-layout{grid-template-columns:1fr}.lesson-panel{margin-top:4px}.lesson-list{max-height:290px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-content:start}.lesson-item{margin:0}.player-status{font-size:10px}.player-actions button,.player-actions a,.danmaku-option{font-size:10px}.player-toolbar{flex-wrap:wrap;row-gap:8px}.player-actions{margin-left:auto}.watch-heading{gap:15px}.watch-heading h1{font-size:19px}.watch-meta{font-size:9px}.detail-save{padding:7px 9px;font-size:9px}.course-description p{font-size:12px}.toast{left:calc(50% + 87px)}}
@media(max-width:700px){.sidebar{display:none}.site-main{margin-left:0}.topbar{height:67px;padding:0 22px}.desktop-wordmark{display:none}.mobile-wordmark{display:block;font-family:var(--serif);font-size:20px;letter-spacing:3px;color:#667c9f}.breadcrumb{gap:11px;font-size:10px}.breadcrumb-divider{font-size:12px}.topbar-right>span{display:none}.mobile-save{display:flex;align-items:center;justify-content:center;padding:8px;background:#e8edf6;border-radius:50%;color:#879bbd}.mobile-save svg{height:15px;width:15px}main{padding:26px 20px 0}.page-heading{margin-bottom:22px}.page-heading h1{font-size:29px}.eyebrow{font-size:7px;letter-spacing:2px}.heading-note{font-size:9px;max-width:93px;line-height:1.8;text-align:right}.hero{height:302px;border-radius:13px}.hero-art{object-position:62% center;opacity:.78}.hero-wash{background:linear-gradient(90deg,#e4ebf7ee,#e6edf7b0 45%,#e6edf720),linear-gradient(0deg,#e4eaf5b0,transparent 70%)}.hero-content{padding:29px 25px}.hero h2{font-size:30px;line-height:1.65;letter-spacing:2px;margin-bottom:12px}.hero-kicker{font-size:9px;letter-spacing:1px;margin-bottom:17px}.hero p{font-size:10px;color:#8193b0;margin-bottom:22px}.hero .button{font-size:10px;padding:10px 15px;gap:18px}.hero-footnote{bottom:18px;right:17px;font-size:5px;letter-spacing:1px}.hero-footnote-line{width:18px}.library{margin-top:31px}.library-heading{display:block;margin-bottom:15px}.section-kicker{font-size:8px}.library h2{font-size:18px}.catalogue-count{font-size:9px;margin-top:11px}.tabs{gap:29px}.tab{font-size:12px;padding-bottom:13px}.reset-filters{font-size:9px;gap:4px}.filters{gap:8px;margin:16px 0 12px}.search-field{height:43px}.search-field input{font-size:11px}.search-field kbd{display:none}.select-field select{font-size:10px;padding-left:12px;min-width:0}.select-field:after{right:12px}.catalogue-notice{font-size:9px;padding:7px 9px;margin-top:12px}.results-section{margin-top:23px}.results-heading h3{font-size:13px;letter-spacing:.5px;gap:8px}.results-heading{margin-bottom:12px}.text-button{font-size:9px;gap:6px}.video-grid{gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}.course-card{border-radius:9px}.course-cover{margin:5px 5px 0;border-radius:5px}.course-body{padding:10px 10px 12px}.course-title{font-size:11px;min-height:36.3px;line-height:1.65}.course-summary{font-size:9px;line-height:1.7;min-height:30.6px;margin-top:6px;margin-bottom:9px}.tag{font-size:8px;padding:2px 5px}.tag-set{gap:4px}.platform{font-size:7px}.course-byline{font-size:8px;gap:4px;margin-top:9px}.author-dot{width:11px;height:11px;font-size:6px}.heat-meta{font-size:7px;line-height:1.8;margin-top:6px}.cover-type{font-size:6px;top:7px;left:7px;padding:2px 5px}.cover-count{font-size:7px;bottom:6px;left:7px}.cover-play{width:23px;height:23px;right:7px;bottom:7px}.cover-play svg{width:10px;height:10px}.bookmark-button{width:24px;height:24px;top:11px;right:11px}.bookmark-button svg{width:11px;height:11px}.article-grid{gap:12px}.articles-section{margin-top:28px}.article-open{padding:11px;gap:13px;min-height:126px}.article-cover{width:91px;height:103px}.article-body{padding-right:12px}.article-title{font-size:13px;margin-bottom:5px}.article-summary{font-size:9px;line-height:1.7;margin-bottom:7px}.article-meta,.article-author{font-size:8px}.article-card .bookmark-button{width:22px;height:22px;top:9px;right:9px}.article-author{margin-top:4px}.results-footer{gap:9px;margin:33px 0 25px}.results-footer p{font-size:8px;letter-spacing:.5px}.results-footer>span{width:17px}.site-footer{margin-top:32px;padding:20px;gap:10px;align-items:center;font-size:7px;letter-spacing:0}.site-footer a{font-size:11px}.site-footer a span{font-size:8px}.toast{left:50%;bottom:23px;max-width:calc(100% - 32px);font-size:11px}.detail-nav{margin-bottom:21px}.back-link{font-size:11px}.detail-breadcrumb{font-size:9px}.watch-heading{display:block;margin-bottom:18px}.watch-heading h1{font-size:19px;line-height:1.75;margin-bottom:13px}.watch-meta{font-size:9px;gap:8px}.watch-heading>.detail-save{margin-top:14px;font-size:10px;padding:7px 12px}.watch-layout{gap:15px}.player-frame{border-radius:9px}.player-loading{font-size:10px;gap:11px}.player-loading .spinner{width:20px;height:20px}.player-toolbar{padding-top:11px;gap:7px}.player-status{width:100%;font-size:9px}.player-actions{width:100%;justify-content:flex-end;gap:17px;margin-top:1px}.player-actions button,.player-actions a,.danmaku-option{font-size:10px}.lesson-current{padding-top:14px;margin-top:7px}.lesson-eyebrow{font-size:8px}.lesson-current h2{font-size:14px}.course-description{padding:19px;margin-top:20px}.course-description p{font-size:11px}.course-description h3{font-size:12px}.lesson-list{grid-template-columns:1fr;max-height:302px}.lesson-panel-heading{padding:15px 17px 12px}.lesson-panel-heading h2{font-size:13px}.lesson-item{font-size:11px;padding:12px 10px;gap:11px}.lesson-number{font-size:10px;min-width:23px}.lesson-duration{font-size:9px}.lesson-note{font-size:9px}.article-detail-banner{height:166px;border-radius:10px;margin-bottom:23px}.article-detail-label{font-size:9px}.article-detail h1{font-size:24px;line-height:1.8;margin-bottom:18px}.article-detail .watch-meta{padding-bottom:20px}.article-preview{font-size:16px;padding-top:24px;line-height:2.1}.article-source-card{padding:21px;display:block}.article-source-card h2{font-size:13px}.article-source-card p{font-size:10px}.article-source-card .button{margin-top:16px;font-size:11px}.article-detail-actions{margin-top:17px}}
@media(max-width:370px){main{padding-left:15px;padding-right:15px}.topbar{padding-left:17px;padding-right:17px}.hero h2{font-size:27px}.hero-content{padding-left:22px}.hero{height:292px}.hero-footnote{font-size:4px}.course-title{font-size:10px;min-height:33px}.course-summary{font-size:8px;min-height:27.2px}.course-body{padding-left:8px;padding-right:8px}.platform{font-size:6px}.tag{font-size:7px}.course-byline{font-size:7px}.heat-meta{font-size:6px}.tabs{gap:23px}.article-cover{width:78px;height:100px}.article-title{font-size:12px}.article-body{padding-right:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

body.in-watch {
  background: #bfcee0 linear-gradient(145deg, #b6c6db, #d6e1ee);
}
.in-watch .topbar,
.in-watch .site-footer {
  border-color: #a1b3ca;
  color: #394f6b;
}
.in-watch .back-link,
.in-watch .watch-meta,
.in-watch .player-status,
.in-watch .player-actions button,
.in-watch .player-actions a,
.in-watch .danmaku-option,
.in-watch .site-footer a,
.in-watch .site-footer a span {
  color: #394f6b;
}
.in-watch .player-actions a {
  font-weight: 600;
}
.in-watch .lesson-current {
  border-color: #a1b3ca;
}
.in-watch .lesson-eyebrow {
  color: #624c36;
}
.in-watch .lesson-panel,
.in-watch .course-description {
  background: #eef3fa;
  border-color: #aebfd4;
}
.in-watch .lesson-panel-heading span,
.in-watch .lesson-item,
.in-watch .lesson-number,
.in-watch .lesson-duration,
.in-watch .lesson-note,
.in-watch .course-description p,
.in-watch .course-description .original-source {
  color: #445a77;
}
.in-watch .lesson-item:hover,
.in-watch .lesson-item.selected {
  background: #dce7f5;
  color: #344f76;
}

.player-frame video {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #101828;
}
.player-actions {
  flex-shrink: 1;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.player-speed,
.player-quality {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  color: #293851;
  font-size: 13px;
  font-weight: 600;
}
.player-speed select,
.player-quality select {
  min-height: 36px;
  padding: 4px 9px;
  border: 1px solid #8fa6c3;
  border-radius: 7px;
  background: #f2f6fc;
  color: inherit;
  font: inherit;
  cursor: pointer;
}
.player-speed[hidden],
.player-quality[hidden],
.danmaku-option[hidden] {
  display: none;
}