.panel-body:has(>.oln-root){padding:0;background:#eef5fc}.oln-root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#333}.oln-root button{font:inherit;cursor:pointer}.oln-content{min-height:530px;height:calc(100dvh - 245px);position:relative;background:#0d1b2a;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 2px 12px #00000026}.oln-error-report{position:absolute;top:16px;right:16px;padding:7px 13px;color:#fff;border:0;background:#ffffff1f;border-radius:16px;z-index:3;font-size:13px!important;backdrop-filter:blur(4px)}.oln-video-area{flex:1;min-height:360px;position:relative;background:#0d1b2a;display:flex;align-items:center;justify-content:center;overflow:hidden}.oln-video-cover{position:absolute;inset:0;background:radial-gradient(ellipse at 80% 50%,#173959,#0d1b2a 70%)}.oln-cover-circle{position:absolute;top:20%;width:250px;height:250px;border:2px solid #64adf136;border-radius:50%;transform:rotate(-20deg)}.oln-cover-circle-a{right:110px}.oln-cover-circle-b{right:-40px}.oln-cover-math{position:absolute;right:55px;top:44%;font-size:46px;color:#a6c9ee22;font-family:Georgia,serif}.oln-video-overlay{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;padding:60px;color:#fff;background:linear-gradient(90deg,#0d1b2ad9,#0d1b2a4d 70%);pointer-events:none}.oln-course-label{font-size:18px;opacity:.9;margin-bottom:12px;letter-spacing:1px}.oln-course-title{font-size:clamp(30px,3.4vw,48px);font-weight:800;line-height:1.25;margin:0 0 30px;text-shadow:0 4px 20px #0006;background:linear-gradient(#fff,#8ec5fc);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;max-width:76%}.oln-instructor-tag{display:inline-block;background:linear-gradient(90deg,#1a6fc4,#2b8de6);padding:8px 24px;border-radius:4px;font-size:18px;font-weight:700;margin-bottom:16px;width:fit-content}.oln-instructor-info{font-size:15px;line-height:1.8;opacity:.85;margin:0}.oln-play-center{position:absolute;left:64%;top:50%;transform:translate(-50%,-50%);width:80px;height:80px;border-radius:50%;border:2px solid #fff6;background:#ffffff26;color:white;font-size:28px!important;display:grid;place-items:center;backdrop-filter:blur(4px)}.oln-video-tag-bar{position:absolute;bottom:24px;left:60px;display:flex;gap:12px;align-items:center;z-index:2}.oln-knowledge-tag{padding:8px 16px;background:#fffffff2;color:#333;border-radius:20px;font-size:13px;font-weight:500;box-shadow:0 2px 8px #0000001a}.oln-collect-btn{padding:8px 16px;border:0;border-radius:20px;background:#2b8de6;color:#fff;font-size:13px!important;font-weight:600!important;box-shadow:0 2px 8px #2b8de64d}.oln-collect-btn.is-collected{background:#1a6fc4}.oln-video-controls{height:64px;flex-shrink:0;background:#0d1b2a;display:flex;align-items:center;padding:0 20px;gap:16px;border-top:1px solid #ffffff14}.oln-ctrl-btn{height:32px;width:32px;flex-shrink:0;display:grid;place-items:center;border-radius:50%;border:0;color:#fff;background:#ffffff1a;font-size:14px!important}.oln-ctrl-btn.oln-play{height:40px;width:40px;font-size:16px!important}.oln-time{font-size:13px;color:#fff;white-space:nowrap;font-variant-numeric:tabular-nums;min-width:94px}.oln-progress-bar{flex:1;position:relative;height:4px;background:#fff3;border-radius:2px;min-width:30px}.oln-progress-bar>i{position:absolute;left:0;top:0;height:100%;background:#2b8de6;border-radius:2px}.oln-progress-bar>i:after{content:"";position:absolute;right:0;top:50%;transform:translate(50%,-50%);width:12px;height:12px;background:#fff;border-radius:50%;box-shadow:0 0 4px #0005}.oln-chapter-dots{position:absolute;inset:0}.oln-chapter-dots span{position:absolute;width:4px;height:4px;background:#ffffff99;border-radius:50%;top:0}.oln-speed-btn{padding:4px 10px;border-radius:4px;background:#ffffff1a;color:#fff;border:0;font-size:13px!important;white-space:nowrap}.oln-fullscreen-btn{font-size:22px!important;color:#fff;border:0;background:transparent;padding:3px}.oln-bottom-bar{min-height:66px;display:flex;align-items:center;flex-wrap:wrap;gap:12px;padding:12px 16px;background:#0d1b2a;border-top:1px solid #ffffff12}.oln-bottom-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;background:#fffffff2;border:1px solid #e0e8f0;border-radius:20px;font-size:13px!important;color:#333;box-shadow:0 2px 8px #00000014;min-height:36px}.oln-bottom-btn.oln-active{background:#e8f4ff;color:#1a6fc4;border-color:#1a6fc4}.oln-progress-note{margin-left:auto;color:#a7bdd2;font-size:12px;white-space:nowrap}.oln-complete{padding:9px 18px;border-radius:20px;border:0;background:#2b8de6;color:#fff;font-size:13px!important;font-weight:600!important;min-height:38px}.oln-real-video{width:100%;height:100%;position:absolute;inset:0;object-fit:contain;background:#0d1b2a}.oln-video-area:has(.oln-real-video) .oln-video-tag-bar{bottom:62px}.oln-is-playing .oln-video-overlay{opacity:.12}.oln-slide-example{position:relative;z-index:1;margin:20px 50px 70px;padding:28px 34px;border:1px solid #fff3;background:#173450e6;border-radius:12px;color:#fff;max-width:700px;text-align:center}.oln-slide-example>span{color:#9dcbfa;font-size:13px}.oln-slide-example h3{font-size:26px;color:#fff;margin:18px 0}.oln-slide-example p{font-size:22px;line-height:1.8;color:#e7f3ff}.oln-slide-example small{display:block;margin-top:20px;color:#9db0c5;font-size:12px}.oln-segment-strip{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 2px 6px}.oln-segment-strip>span{font-size:12px;color:#7890a6;margin-right:6px}.oln-segment-strip>button{display:flex;align-items:center;gap:7px;border:1px solid #d8e8f6;border-radius:7px;background:#fff;padding:8px 12px;color:#586e80;font-size:12px;min-height:38px}.oln-segment-strip>button.is-active{background:#e8f4ff;color:#1a6fc4;border-color:#84b4df}.oln-segment-strip small{font-size:11px;color:#83a0ba;font-variant-numeric:tabular-nums}.oln-demo-note{font-size:11px!important;color:#7b8da0;margin:6px 2px 0}.oln-modal-overlay{position:fixed;inset:0;background:#0008;display:flex;align-items:center;justify-content:center;padding:20px;z-index:120}.oln-modal{width:680px;max-width:100%;max-height:80dvh;background:linear-gradient(#eef5fc,#fff 120px);border-radius:20px;padding:24px;box-shadow:0 20px 60px #0004;display:flex;flex-direction:column;text-align:left}.oln-modal-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:16px}.oln-modal-header h2{font-size:17px;color:#1a1a1a;margin:0;font-weight:700}.oln-modal-close{border:0;border-radius:50%;height:32px;width:32px;background:#0000000d;color:#666;font-size:24px!important;display:grid;place-items:center}.oln-modal-body{overflow:auto;min-height:0}.oln-collect-list{display:flex;flex-direction:column;gap:14px}.oln-collect-item{display:flex;align-items:center;gap:16px;background:#fff;border-radius:12px;padding:12px;box-shadow:0 1px 4px #0000000a}.oln-item-thumb{width:142px;height:88px;border-radius:8px;background:linear-gradient(135deg,#112a44,#1c5689);position:relative;display:grid;place-items:center;color:#ffffff80;flex-shrink:0;font-size:26px}.oln-item-thumb small{position:absolute;top:6px;right:6px;background:#2b8de6;color:#fff;padding:2px 6px;border-radius:4px;font-size:11px;font-weight:600}.oln-item-info{flex:1;min-width:0}.oln-item-info b{font-size:14px;color:#1a1a1a;line-height:1.5}.oln-item-info p{font-size:12px;color:#888;margin:5px 0}.oln-item-play{font-size:11px!important;background:#e8f4ff;color:#1a6fc4;border:0;border-radius:12px;padding:4px 8px}.oln-item-collect{padding:8px 13px;border:1px solid #1a6fc4;background:#fff;color:#1a6fc4;border-radius:16px;font-size:12px!important;font-weight:600!important;white-space:nowrap;flex-shrink:0;min-height:36px}.oln-item-collect.is-collected{background:#2b8de6;color:#fff;border-color:#2b8de6}.oln-knowledge-tabs{display:flex;gap:7px;margin-bottom:16px;flex-wrap:wrap}.oln-knowledge-tabs button{border:1px solid #d5e4f2;background:#fff;color:#617184;border-radius:8px;padding:10px 13px;font-size:13px;min-height:42px}.oln-knowledge-tabs button.is-active{background:#1a6fc4;color:#fff;border-color:#1a6fc4}.oln-knowledge-card{border:1px solid #e1ebf4;border-radius:12px;background:#fff;padding:22px}.oln-knowledge-card h3{font-size:18px;color:#1a6fc4;margin:0 0 14px}.oln-knowledge-card p{font-size:15px;line-height:1.8;color:#3d4f61}.oln-knowledge-example{padding:13px 16px;background:#eef6fe;border-radius:8px;line-height:1.8;color:#315878;margin:16px 0;font-size:14px}.oln-confirm{border:1px solid #1a6fc4;background:#1a6fc4;color:#fff;border-radius:20px;padding:10px 18px;font-size:13px;min-height:42px}.oln-confirm[aria-pressed=true]{background:#e8f4ff;color:#1a6fc4}.oln-modal-note{font-size:12px!important;color:#7890a6;line-height:1.7;margin:12px 2px}.oln-ai-summary section{padding:18px;background:#fff;border:1px solid #dfebf6;border-radius:12px;margin-bottom:10px}.oln-ai-summary h3{font-size:15px;color:#1a6fc4;margin:0 0 8px}.oln-ai-summary p{font-size:14px;line-height:1.8;color:#475e73;margin:0 0 8px}.oln-ai-summary section>div{font-size:13px;color:#6b8296;background:#f1f7fc;border-radius:6px;padding:10px;line-height:1.7}
@media(max-width:1100px){.oln-video-overlay{padding:40px}.oln-video-tag-bar{left:40px}.oln-course-title{font-size:36px;max-width:82%}.oln-bottom-bar{gap:8px}.oln-bottom-btn{padding:8px 12px}.oln-progress-note{font-size:11px}.oln-complete{padding:9px 12px}.oln-video-controls{gap:11px}.oln-content{height:auto;min-height:550px}.oln-video-area{min-height:400px}}@media(max-width:600px){.oln-content{min-height:490px;border-radius:10px}.oln-video-area{min-height:335px}.oln-video-overlay{padding:28px 24px 70px;justify-content:center}.oln-course-label{font-size:13px;margin-bottom:10px}.oln-course-title{font-size:28px;max-width:96%;margin-bottom:20px}.oln-instructor-tag{font-size:14px;padding:6px 14px;margin-bottom:12px}.oln-instructor-info{font-size:12px}.oln-play-center{width:58px;height:58px;font-size:21px!important;left:80%;top:69%}.oln-video-tag-bar{left:16px;right:16px;bottom:15px;gap:8px}.oln-knowledge-tag{font-size:11px;padding:7px 11px;max-width:72%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.oln-collect-btn{font-size:11px!important;padding:7px 11px}.oln-error-report{top:11px;right:11px;font-size:11px!important;padding:6px 10px}.oln-video-controls{gap:8px;padding:0 12px;height:56px}.oln-time{font-size:10px;min-width:78px}.oln-ctrl-btn{width:28px;height:28px}.oln-ctrl-btn.oln-play{width:32px;height:32px}.oln-speed-btn{font-size:11px!important;padding:4px 6px}.oln-bottom-bar{gap:7px;padding:11px 12px}.oln-bottom-btn{font-size:11px!important;padding:7px 10px;min-height:34px}.oln-progress-note{margin-left:0;flex:1}.oln-complete{font-size:12px!important;margin-left:auto}.oln-segment-strip{gap:7px;padding-top:12px}.oln-segment-strip>span{width:100%}.oln-segment-strip>button{width:100%;justify-content:flex-start;min-height:40px}.oln-slide-example{margin:20px 20px 70px;padding:20px}.oln-slide-example h3{font-size:20px}.oln-slide-example p{font-size:17px}.oln-slide-example small{font-size:10px}.oln-modal-overlay{padding:12px}.oln-modal{padding:18px 14px;max-height:85dvh}.oln-item-thumb{width:80px;height:65px}.oln-collect-item{gap:10px;padding:10px}.oln-item-info b{font-size:12px}.oln-item-info p{font-size:11px}.oln-item-collect{font-size:11px!important;padding:7px 9px}.oln-knowledge-tabs{gap:5px}.oln-knowledge-tabs button{font-size:11px;padding:9px}.oln-knowledge-card{padding:18px 14px}.oln-knowledge-card h3{font-size:16px}.oln-knowledge-card p{font-size:14px}.oln-knowledge-example{font-size:13px}.oln-cover-circle{width:180px;height:180px;top:30%}.oln-cover-circle-a{right:10px}.oln-cover-circle-b{right:-90px}}
.oln-learning-states{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:#748aa4;padding:12px 4px}.oln-learning-states span{background:#f0f6fd;border-radius:6px;padding:5px 9px}.oln-collection-heading{font-size:14px;color:#376694;margin:10px 0 15px}.oln-card-bookmarks{display:grid;gap:10px}.oln-card-bookmarks>button{display:flex;justify-content:space-between;align-items:center;gap:15px;text-align:left;border:1px solid #e0e9f4;background:#f8fbff;border-radius:8px;padding:14px;min-height:48px;color:#376694;font-size:12px}.oln-card-bookmarks>p{padding:12px;color:#8998aa;font-size:12px}.oln-card-bookmarks span{font-size:11px}.oln-bookmark-card{background:#eef6ff!important;color:#1a6fc4!important;margin-top:10px!important;min-height:44px}