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16px 28px;overflow-x:hidden;overflow-y:auto;gap:0}.slide-deck{--available-h: calc(100dvh - var(--slide-outer-gap));--available-w: calc(100vw - 32px) ;width:min(1280px,var(--available-w),var(--available-h) * 16 / 9);max-height:var(--available-h);aspect-ratio:16/9;background:var(--color-card);border-radius:var(--radius);box-shadow:var(--shadow);position:relative;overflow:hidden;display:flex;flex-direction:column;cursor:pointer;flex-shrink:1;min-height:0}.slide-content-area{flex:1;min-height:0;padding:var(--slide-padding-y) var(--slide-padding-x);overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column;-webkit-overflow-scrolling:touch}.slide-content-area::-webkit-scrollbar{width:6px}.slide-content-area::-webkit-scrollbar-thumb{background:#4a90d959;border-radius:3px}.slide-page{display:flex;flex-direction:column;flex:1;min-height:0;overflow:hidden}.slide-content-side{height:100%;max-height:100%}.slide-content-side .slide-title{margin-bottom:10px;font-size:clamp(20px,2.2vw,26px)}.slide-title{font-size:var(--font-title);color:var(--color-primary);margin-bottom:16px;font-weight:700;border-left:5px solid var(--color-accent);padding-left:16px;flex-shrink:0;line-height:1.3}.slide-body{flex:1;font-size:var(--font-body);line-height:1.6;min-height:0}.slide-body-sparse{display:flex;flex-direction:column;justify-content:center}.fragment-list-sparse{flex:1;display:flex;flex-direction:column;justify-content:center;gap:clamp(12px,2vh,22px);max-width:920px;margin:0 auto;width:100%;padding:8px 0}.fragment-list-sparse .fragment-item{font-size:clamp(17px,2.1vw,22px);line-height:1.55}.fragment-list-sparse .fragment-item.step{padding:12px 20px;font-size:clamp(18px,2.2vw,23px)}.fragment-list-sparse .fragment-item.question{font-size:clamp(18px,2.3vw,24px)}.fragment-list-sparse .fragment-item.card{padding:16px 22px;font-size:clamp(18px,2.2vw,23px)}.fragment-list-sparse .fragment-item.highlight{width:100%;align-items:stretch}.fragment-list-sparse .fragment-item.highlight:before{display:none}.fragment-list-sparse .fragment-item.highlight .highlight-box{width:100%;font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.65;padding:clamp(22px,3.5vh,40px) clamp(28px,4vw,52px);border-radius:16px;border-width:3px;margin:clamp(10px,2vh,20px) 0;text-align:center;letter-spacing:.02em;color:#3d3428}.fragment-list-sparse :deep(.math-formula){font-size:clamp(20px,2.5vw,28px)!important}.fragment-list-sparse :deep(.math-display){margin:12px 0}.fragment-list{list-style:none;display:flex;flex-direction:column;gap:10px}.fragment-item{display:flex;align-items:flex-start;gap:10px}.fragment-item:before{content:"●";color:var(--color-accent);flex-shrink:0;margin-top:2px}.fragment-item.question{font-size:var(--font-formula);color:var(--color-accent);font-weight:600}.fragment-item.question:before{content:"❓"}.fragment-item.step{background:#f0f7ff;padding:8px 16px;border-radius:8px;border-left:4px solid var(--color-primary)}.fragment-item.step:before{content:"→";color:var(--color-primary);font-weight:700}.fragment-item.card{background:linear-gradient(135deg,#e8f4fd,#d6ebfa);padding:12px 18px;border-radius:10px;font-weight:600}.fragment-item.card:before{content:"★";color:var(--color-accent)}.slide-footer{display:flex;align-items:center;justify-content:space-between;padding:8px 20px;border-top:1px solid #eee;font-size:13px;color:var(--color-text-light);flex-shrink:0}.slide-progress-bar{position:absolute;bottom:0;left:0;height:3px;background:var(--color-primary);transition:width .3s ease}.breadcrumb{font-size:var(--font-small);color:var(--color-text-light);margin-bottom:6px;flex-shrink:0;width:100%;max-width:1280px}.breadcrumb a{color:var(--color-primary);text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.diagram-wrap{max-width:100%;flex-shrink:1;margin-bottom:8px}.diagram-wrap svg{display:block;max-width:100%;height:auto}.slide-body-side{display:grid;grid-template-columns:minmax(0,52%) minmax(0,48%);gap:12px;min-height:0;flex:1;overflow:hidden}.slide-copy{min-width:0;min-height:0;overflow-x:hidden;overflow-y:auto;padding-right:6px}.slide-copy::-webkit-scrollbar{width:4px}.slide-copy::-webkit-scrollbar-thumb{background:#4a90d94d;border-radius:2px}.slide-body-side .slide-copy .fragment-list{gap:5px}.slide-body-side .slide-copy .fragment-item{font-size:15px;line-height:1.45}.slide-body-side .slide-copy .fragment-item.step{padding:5px 10px}.slide-body-side .slide-copy .fragment-item.question{font-size:15px}.slide-body-side .slide-copy .highlight-box{padding:8px 12px;margin:4px 0;font-size:14px;line-height:1.4}.slide-body-side .slide-copy .math-formula,.slide-body-side .slide-copy :deep(.math-formula){font-size:15px!important}.slide-body-side .slide-copy :deep(.math-display){margin:6px 0;text-align:left;overflow-x:auto}.diagram-wrap-side{min-width:0;min-height:0;height:100%;margin-bottom:0;display:flex;align-items:stretch;justify-content:center;padding:0 0 0 12px;border-left:2px dashed #d6e8f8;overflow:hidden}@media (max-width: 860px){.slide-body-side{grid-template-columns:1fr;grid-template-rows:auto minmax(240px,1fr);overflow-y:auto}.diagram-wrap-side{border-left:none;border-top:2px dashed #d6e8f8;padding:12px 0 0;min-height:280px}}@media (max-height: 900px){.highlight-box{padding:10px 16px;margin:8px 0}.fragment-list-sparse .fragment-item.highlight .highlight-box{font-size:clamp(20px,2.6vw,28px);padding:20px 28px}}.answer-hint{margin-top:16px;padding:10px 16px;background:#fff8e8;border-radius:8px;color:var(--color-accent);font-size:var(--font-small);font-weight:600;text-align:center}.answer-reveal{background:#edfbf0;padding:10px 18px;border-radius:10px;border-left:4px solid #52c41a;font-size:var(--font-body);line-height:1.5}@media (max-height: 780px){.slide-deck-wrapper{padding:4px 12px 8px}.fragment-list{gap:6px}}