.angles-page{--angle-coral:#c87967;--angle-blue:#548eb1}.angles-page .site-header{max-width:1180px}.angle-header-note{font-size:12px;color:#7f9286;margin-right:auto}.angle-back{font-size:13px;color:var(--green)}.angle-course-heading{display:flex;justify-content:space-between;align-items:center;margin:35px 0 28px;gap:20px}.angle-course-heading h1{font-size:35px;font-weight:650;letter-spacing:.5px;margin:0 0 12px}.angle-course-heading p:last-child{font-size:15px;color:#6b8172;margin:0}.angle-course-tag{font-size:11px;color:#6a8d75;background:#e7f1e9;border-radius:8px;padding:10px 14px;white-space:nowrap}.angle-chapters{display:flex;gap:8px;padding-bottom:16px;overflow:auto}.angle-chapters button{border:1px solid #e1eae3;background:#fff;border-radius:8px;padding:11px 18px;min-height:44px;font-size:13px;white-space:nowrap;color:#748b7b}.angle-chapters button[aria-current=step]{color:var(--green);background:#e3efe6;border-color:#c7ddcd;font-weight:600}.angle-player{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.angle-stage-heading{background:#f0f6f1;display:flex;justify-content:space-between;padding:19px 25px;color:#668670;font-size:12px;gap:15px}.angle-stage-heading>span:last-child{font-size:11px;color:#829c88}.angle-stage{background:#f0f6f1}#angle-stage{background:#f0f6f1;position:relative}#angle-svg{width:100%;height:auto;max-height:450px;display:block;font-family:var(--font)}#angle-pinyin{font-size:30px;fill:#809588;letter-spacing:1px}#angle-name{font-size:60px;fill:var(--ink);font-weight:650}#angle-rule{font-size:25px;fill:#698772}.angle-caption{font-size:20px;line-height:1.8;color:#486c56;max-width:850px;margin:0 auto;min-height:82px;padding:18px 28px;text-align:center;display:flex;align-items:center;justify-content:center}.angle-transport{display:flex;align-items:center;gap:16px;padding:16px 25px 23px;border-top:1px solid #edf2ed}.angle-play{min-width:165px;min-height:50px;font-size:15px;gap:12px}.angle-play>span{font-size:15px}.angle-play:disabled{opacity:.55}.angle-replay{width:44px;height:44px;color:#779780;font-size:24px}.angle-progress{flex:1;min-width:0}.angle-progress input{width:100%;accent-color:var(--green);cursor:pointer;display:block;height:5px;margin:9px 0 13px}.angle-progress>div{display:flex;justify-content:space-between;font-size:11px;color:#7c9483;gap:10px}#angle-time{font-family:"Trebuchet MS",sans-serif;white-space:nowrap}.angle-finish{padding:20px 25px;background:#edf5e9;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#58784a;font-size:14px}.angle-finish .button{min-width:180px}.angle-explorer{background:#fff;border:1px solid var(--line);border-radius:15px;padding:27px 30px;margin:25px 0}.angle-explorer-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.angle-explorer h2{font-size:23px;margin:0 0 10px;font-weight:600}.angle-explorer-head p:last-child{font-size:13px;color:#768d7c;line-height:1.9;margin:0}.angle-explorer-head .section-kicker{font-size:11px}.angle-presets{display:flex;gap:12px;margin:24px 0}.angle-presets button{border:1px solid #d7e4da;border-radius:9px;background:#f4f8f4;color:#62826b;min-width:115px;min-height:48px;font-size:16px}.angle-presets button[aria-pressed=true]{background:#e0eee3;border-color:#81aa8d;color:#287b50}.angle-sliders{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin:20px 0 24px}.angle-sliders label{font-size:13px;color:#67836f}.angle-sliders input{accent-color:#4d9670;display:block;width:100%;margin-top:17px;height:6px}.angle-sliders input::-webkit-slider-thumb{cursor:grab}#explorer-feedback{font-size:14px;color:#637f6b;line-height:1.8;margin:18px 0 14px}.angle-transcript{font-size:12px;line-height:1.9;color:#7d9082;margin:25px 0 35px;padding:20px 25px;border:1px solid var(--line);border-radius:12px}.angle-transcript summary{cursor:pointer;color:#607c69}.angle-transcript h3{font-size:14px;margin:20px 0 8px}.angle-transcript p{margin:0 0 12px}.angle-transcript>p{border-top:1px solid var(--line);padding-top:15px;margin-top:20px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.angle-quiz{border:1px solid var(--line);background:#fff;border-radius:16px;margin-top:25px;padding:27px 30px}.angle-quiz-head{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#76927f}.angle-quiz-head .button{min-height:43px;font-size:12px}.angle-quiz h2{font-size:26px;margin:20px 0 0;font-weight:600}#angle-question-art{background:#f0f6f1;border-radius:12px;margin:20px 0;overflow:hidden}#angle-question-art svg{width:100%;height:auto;max-height:280px;display:block;font-family:var(--font)}#angle-answers{display:flex;gap:15px;max-width:650px;margin:25px auto 0}#angle-answers button{flex:1;min-height:81px;border:1px solid #d9e5db;background:#fff;border-radius:12px;font-size:22px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:7px;line-height:1.4}#angle-answers button small{font-size:12px;color:#7c9585;font-weight:400}#angle-answers button.correct{background:#e3f0e2;border-color:#6fa26f;color:#37794b}#angle-answers button.retry{background:#fff3e4;border-color:#d4b580;color:#9b7846}#angle-answers button:disabled{cursor:default}.angle-quiz-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px}.angle-quiz-bottom .button{min-width:150px}#angle-answer-feedback{min-height:28px;text-align:center;font-size:16px;line-height:1.9;color:#5e7b68;margin:22px 0}.angle-award{text-align:center;background:#eff5e9;padding:30px 20px;border-radius:12px;margin-top:20px}.angle-award .award-star{color:#dab14b;font-size:65px;display:block}.angle-award h3{font-size:26px;margin:10px 0 16px}.angle-award p{font-size:15px;line-height:1.9;color:#6e866c}.angle-award .button{margin-top:8px}#angle-portal-link{margin-left:auto;font-size:11px;color:#60836d}
@media(max-width:800px){.angle-course-heading h1{font-size:30px}.angle-header-note{display:none}.angle-back{margin-left:auto}.angle-chapters button{font-size:12px;padding:10px 14px}.angle-course-heading p:last-child{font-size:13px}.angle-transport{flex-wrap:wrap;padding:18px 22px}.angle-progress{flex-basis:100%;order:3}.angle-caption{font-size:18px;min-height:95px}.angle-play{flex:1}.angle-replay{margin-left:auto}.angle-explorer{padding:24px}.angle-quiz{padding:24px}}
@media(max-width:560px){.angle-course-heading{margin:25px 0 23px}.angle-course-heading h1{font-size:28px}.angle-course-heading .section-kicker{font-size:11px}.angle-course-heading p:last-child{font-size:13px;line-height:1.9;max-width:260px}.angle-course-tag{display:none}.angle-back{font-size:12px}.angle-chapters{margin-right:-18px;gap:7px;padding-right:18px;padding-bottom:14px}.angle-chapters button{font-size:12px;min-height:43px;padding:10px 13px;flex-shrink:0}.angle-player{border-radius:13px}.angle-stage-heading{padding:16px 18px;font-size:12px}.angle-stage-heading>span:last-child{display:none}#angle-svg{min-height:240px;max-height:290px}#angle-name{font-size:66px}#angle-pinyin{font-size:34px}#angle-rule{font-size:31px}.angle-caption{font-size:17px;line-height:1.85;min-height:112px;padding:14px 20px;text-align:left}.angle-transport{padding:16px 18px;gap:12px}.angle-play{font-size:15px;min-height:51px}.angle-progress>div{font-size:10px}.angle-progress>div>span:first-child{max-width:180px;line-height:1.8}.angle-finish{flex-direction:column;align-items:stretch;padding:18px;gap:15px;font-size:13px}.angle-finish .button{font-size:14px}.angle-explorer{padding:22px 20px;margin:20px 0}.angle-explorer-head{display:block}.angle-explorer h2{font-size:22px}.angle-explorer-head p:last-child{font-size:12px}.angle-explorer-head>.button{width:100%;margin-top:18px;font-size:13px}.angle-presets{gap:8px;margin:20px 0}.angle-presets button{flex:1;min-width:0;min-height:48px;font-size:16px}.angle-sliders{grid-template-columns:1fr;gap:25px}.angle-sliders label{font-size:13px}#explorer-feedback{font-size:13px}.angle-transcript{padding:18px 20px;font-size:11px}.angle-quiz{padding:20px 18px;border-radius:13px}.angle-quiz h2{font-size:22px;line-height:1.5;margin-top:17px}.angle-quiz-head{font-size:11px}.angle-quiz-head .button{font-size:11px;min-height:41px;padding:9px 12px}#angle-question-art{margin-top:18px}#angle-question-art svg{min-height:180px}#angle-answers{gap:9px;margin-top:19px}#angle-answers button{font-size:22px;min-height:81px}#angle-answers button small{font-size:11px}#angle-answer-feedback{font-size:14px;line-height:1.9;margin:18px 0;min-height:27px}.angle-quiz-bottom .button{font-size:12px;min-width:125px}.angle-quiz-bottom .text-button{font-size:11px}.angle-award h3{font-size:23px}.angle-award p{font-size:14px}#angle-portal-link{font-size:10px}}
.angle-stage-heading{align-items:center;padding-block:12px}.angle-stage-heading #angle-scene-hint{margin-left:auto}.angle-stage-heading .button{font-size:12px;min-height:40px;padding:8px 14px;gap:0}.angle-stage-heading .button:disabled{opacity:.5}@media(max-width:560px){.angle-stage-heading #angle-scene-hint{display:none}.angle-stage-heading .button{margin-left:auto;font-size:12px;min-height:40px}}
.angle-player.exploring{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(290px,1fr)}.angle-player.exploring>.angle-stage-heading,.angle-player.exploring>.angle-caption,.angle-player.exploring>.angle-transport,.angle-player.exploring>.angle-finish{grid-column:1/-1}.angle-player.exploring>#angle-explorer-controls{grid-column:2;grid-row:2;padding:12px 23px 22px;border-left:1px solid var(--line);background:#f8fbf7}.angle-player.exploring .angle-sliders{grid-template-columns:1fr;gap:24px;margin-top:10px}.angle-player.exploring .angle-presets{margin-top:15px;gap:8px}.angle-player.exploring .angle-presets button{min-width:0;flex:1}.angle-player.exploring #angle-stage{display:flex;align-items:center}.angle-player.exploring #angle-rule{font-size:25px}.angle-player.exploring #explorer-feedback{font-size:13px}.angle-player.exploring .angle-stage-heading #angle-scene-hint{display:none}@media(max-width:800px){.angle-player.exploring{grid-template-columns:1fr}.angle-player.exploring>#angle-explorer-controls{grid-column:1;grid-row:auto;border-left:0;border-top:1px solid var(--line);padding:7px 20px 20px}.angle-player.exploring .angle-presets{margin:13px 0 18px}.angle-player.exploring .angle-sliders{gap:21px;margin:10px 0 20px}.angle-player.exploring #angle-svg{min-height:230px;max-height:285px}.angle-player.exploring #angle-caption{display:none}}