.lesson-media-shell{position:relative;margin:0}.lesson-video-cover{position:relative;display:block;width:100%;aspect-ratio:16/9;overflow:hidden;border-radius:22px;padding:0;background-image:linear-gradient(90deg,rgba(255,253,247,.98) 0%,rgba(255,253,247,.9) 43%,rgba(255,253,247,.18) 73%,transparent 100%),var(--lesson-cover);background-size:cover;background-position:center;box-shadow:0 16px 38px rgba(30,76,71,.16);text-align:left;color:#184b48}.lesson-video-cover:after{content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.82);border-radius:inherit;pointer-events:none}.lesson-cover-copy{position:absolute;z-index:1;left:20px;top:17px;bottom:15px;width:61%;display:flex;flex-direction:column;align-items:flex-start}.lesson-cover-copy small{font-size:8px;letter-spacing:.08em;color:#6b8882}.lesson-cover-copy em{margin-top:10px;padding:4px 9px;border-radius:20px;background:#185a56;color:#fffaf0;font-size:9px;font-style:normal;font-weight:700;letter-spacing:.12em}.lesson-cover-copy b{margin-top:8px;color:#ad7b3d;font-family:"Songti SC","STSong",serif;font-size:20px;line-height:1.15}.lesson-cover-copy strong{display:-webkit-box;margin-top:5px;overflow:hidden;color:#183f3e;font-family:"Songti SC","STSong",serif;font-size:13px;line-height:1.35;font-weight:700;-webkit-line-clamp:2;-webkit-box-orient:vertical}.lesson-cover-play{position:absolute;z-index:2;right:16px;bottom:14px;display:flex;align-items:center;gap:7px;padding:7px 11px 7px 7px;border-radius:24px;background:rgba(19,76,72,.9);color:#fff;box-shadow:0 8px 20px rgba(14,61,58,.2)}.lesson-cover-play i{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#216a64;font-size:10px;font-style:normal;padding-left:2px}.lesson-cover-play span{font-size:10px;font-weight:700}.lesson-video-cover[hidden],.guided-media[hidden],.media-state[hidden]{display:none!important}.lesson-media-shell .guided-media{aspect-ratio:16/9;object-fit:contain;background:#102b2a}.lesson-media-shell .media-state{margin-top:8px;text-align:center}
.voice-input{overflow:visible!important}.voice-choice-label{margin:10px 0 15px!important;font-size:13px!important}.voice-record{position:relative!important;width:112px!important;height:112px!important;overflow:visible!important;background:linear-gradient(145deg,#fffef9,#dcefeb)!important;box-shadow:0 16px 38px rgba(29,79,75,.18),inset 0 0 0 1px rgba(47,129,121,.15)!important}.microphone-icon{width:52px;height:52px;overflow:visible;fill:#2f8179;stroke:#2f8179;stroke-width:3.5;stroke-linecap:round;stroke-linejoin:round}.microphone-icon rect{fill:none}.voice-button-label{position:absolute!important;left:50%;bottom:-34px;transform:translateX(-50%);width:170px!important;margin:0!important;color:#356e68!important;font-size:13px!important;line-height:1.35!important;white-space:nowrap}.voice-status{display:block!important;width:100%;min-height:20px!important;margin:49px 0 0!important;color:#6f8984!important;font-size:12px!important;line-height:1.7!important;text-align:center}.voice-input audio{margin-top:12px!important}.voice-privacy{max-width:330px!important;margin:11px auto 0!important;font-size:10px!important;line-height:1.65!important}.voice-record.recording .voice-button-label{color:#8f453a!important}.recording-stop{width:34px;height:34px;border-radius:8px;background:#fff;box-shadow:0 0 0 9px rgba(255,255,255,.16)}.retry-button{margin-top:9px;padding:8px 15px;border-radius:18px;background:#fff3e6;color:#9d6640;font-size:12px;font-weight:700}
body.share-preview-open{overflow:hidden}.share-preview-overlay{position:fixed;z-index:9999;inset:0;display:flex;align-items:flex-end;justify-content:center;padding-top:env(safe-area-inset-top);background:rgba(7,35,34,.78);backdrop-filter:blur(9px)}.share-preview-panel{position:relative;width:min(100%,470px);max-height:96svh;overflow:auto;padding:22px 20px calc(24px + env(safe-area-inset-bottom));border-radius:26px 26px 0 0;background:#f9f6ed;color:#214d4b;text-align:center;box-shadow:0 -20px 60px rgba(0,0,0,.2)}.share-preview-close{position:absolute;top:12px;right:14px;width:38px;height:38px;border-radius:50%;background:rgba(33,77,75,.08);color:#315f5a;font-size:25px;line-height:1}.share-preview-kicker{margin:2px 42px 7px;color:#b1843f;font-size:11px;letter-spacing:.08em}.share-preview-panel h2{margin:0;font-family:"Songti SC","STSong",serif;font-size:23px}.share-preview-tip{margin:8px auto 15px;max-width:330px;color:#71847f;font-size:12px;line-height:1.65}.share-preview-panel img{display:block;width:min(76%,310px);height:auto;margin:0 auto 15px;border-radius:15px;box-shadow:0 14px 34px rgba(24,63,62,.18);-webkit-touch-callout:default;user-select:auto}.share-preview-share,.share-preview-confirm,.share-preview-download{display:block;width:100%;min-height:49px;margin-top:9px;border-radius:25px;padding:13px 18px;font:700 14px/1.35 "PingFang SC","Microsoft YaHei",sans-serif;text-decoration:none}.share-preview-share,.share-preview-confirm{background:linear-gradient(110deg,#1f7771,#39958c);color:#fff;box-shadow:0 9px 22px rgba(25,99,93,.18)}.share-preview-download{border:1px solid #bdd7d0;background:#fffdf8;color:#347a74}@media(max-width:360px){.lesson-cover-copy{left:16px;top:13px;width:63%}.lesson-cover-copy small{font-size:7px}.lesson-cover-copy em{margin-top:7px}.lesson-cover-copy b{font-size:18px}.lesson-cover-copy strong{font-size:11px}.lesson-cover-play span{display:none}.share-preview-panel img{width:min(72%,270px)}}