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var(--accent-border);border-radius:18px;background:#ffffffad}.memory-empty-title{color:var(--accent-strong);font-size:1rem;font-weight:800;margin-bottom:6px}.story-memory-panel{min-height:220px}.story-memory-panel--special{min-height:0}.story-group-select{width:100%;min-height:48px;padding:0 14px;border-radius:16px;border:1px solid var(--accent-border);background:#fffffff0;color:var(--accent-strong);font:inherit;font-weight:700}@media(max-width:720px){.memory-panel--reader{padding:4px 0 0;border:none;box-shadow:none;background:transparent}.memory-deck-image,.slide-deck--reader .memory-deck-image,.slide-deck--immersive .memory-deck-image{border-radius:16px;max-height:none}}.flashcard-panel .card-shell{touch-action:pan-y;overscroll-behavior-x:contain}.flashcard-panel .card-shell{min-height:clamp(460px,70dvh,820px);height:auto;overflow:visible;flex:0 0 auto}.flashcard-panel .card-surface{min-height:clamp(460px,70dvh,820px);height:auto;overflow:visible;padding:24px 20px 34px;contain:none}.flashcard-panel .card-front-content,.flashcard-panel .card-back-content{min-height:0;width:100%}.flashcard-panel .card-front-content{justify-content:flex-start;gap:20px}.flashcard-panel .card-front-fallback{width:100%}.flashcard-panel .card-front-content--c2-composed{justify-content:center;gap:18px}.flashcard-panel .sentence-front-frame{width:min(100%,27ch)}.flashcard-panel .word-heading{max-width:100%;overflow-wrap:anywhere;word-break:break-word;-webkit-hyphens:auto;hyphens:auto;text-wrap:pretty;line-height:1.08}.flashcard-panel .card-back-content{gap:16px;padding-top:0;padding-bottom:8px}.flashcard-panel .detail-stream{gap:8px}.flashcard-panel .collocation-list{margin:0;padding-left:1.1rem;line-height:1.78;font-size:1.04rem;color:var(--text-body)}.flashcard-panel .collocation-list li+li{margin-top:8px}.flashcard-panel .synonym-list .word-list-placeholder,.flashcard-panel .collocation-list .word-list-placeholder{list-style:none}.flashcard-panel .example-sentence,.flashcard-panel .back-example,.flashcard-panel .meaning-line,.flashcard-panel .translation-line-compact,.flashcard-panel .synonym-list,.flashcard-panel .collocation-list{overflow-wrap:anywhere;word-break:break-word}.flashcard-panel .card-back-content--c2-readable .detail-label{font-size:.96rem}.flashcard-panel .card-back-content--c2-readable .meaning-line,.flashcard-panel .card-back-content--c2-readable .translation-line-compact,.flashcard-panel .card-back-content--c2-readable .synonym-list,.flashcard-panel .card-back-content--c2-readable .back-example{font-size:1.2em}@media(max-width:720px){.flashcard-panel{gap:4px;padding:0 0 10px}.flashcard-panel .card-shell{min-height:calc(100dvh - 182px)}.flashcard-panel .card-surface{min-height:calc(100dvh - 182px);padding:18px 16px 28px;border-radius:18px}.flashcard-panel .word-heading{font-size:clamp(1.7rem,8.3vw,2.2rem);line-height:1.04;letter-spacing:-.03em}.flashcard-panel .example-sentence{font-size:clamp(1rem,5vw,1.22rem);line-height:1.54}.flashcard-panel .sentence-front-frame{width:min(100%,25ch);gap:14px}.flashcard-panel .example-sentence--sentence-only{font-size:clamp(1.12rem,5.3vw,1.38rem);line-height:1.62}.flashcard-panel .example-sentence--sentence-only .target-highlight--c2-front{font-size:1.48em}.flashcard-panel .back-example,.flashcard-panel .meaning-line,.flashcard-panel .translation-line-compact,.flashcard-panel .synonym-list{font-size:.98rem;line-height:1.5}}.flashcard-panel:not(.image-flashcard-panel){min-height:0}.flashcard-panel:not(.image-flashcard-panel) .card-shell{--standard-card-height: clamp(460px, 70dvh, 820px);flex:0 0 var(--standard-card-height);height:var(--standard-card-height);min-height:0;max-height:var(--standard-card-height);overflow-x:hidden;overflow-y:auto;overscroll-behavior:contain;scrollbar-gutter:stable}.flashcard-panel:not(.image-flashcard-panel) .card-surface{display:block;min-height:100%;height:100%;overflow:visible;contain:none}.flashcard-panel:not(.image-flashcard-panel) .card-front-content,.flashcard-panel:not(.image-flashcard-panel) .card-back-content{min-height:100%;height:auto;overflow:visible}.flashcard-panel:not(.image-flashcard-panel) .controls{position:static;flex:0 0 auto;min-height:52px}@media(max-width:720px){.flashcard-panel:not(.image-flashcard-panel) .card-shell{--standard-card-height: clamp(360px, calc(100dvh - 182px) , 640px)}}.flashcard-panel:not(.image-flashcard-panel) .sentence-front-frame,.flashcard-panel:not(.image-flashcard-panel) .example-sentence{width:min(100%,68ch);max-width:100%;margin-inline:auto}.flashcard-panel:not(.image-flashcard-panel) .example-sentence{min-width:0;font-size:clamp(1.35rem,2vw,1.45rem);line-height:1.55;text-align:left;text-wrap:wrap;white-space:normal;overflow-wrap:normal;word-break:normal;-webkit-hyphens:none;hyphens:none}.flashcard-panel:not(.image-flashcard-panel) .example-sentence .target-highlight,.flashcard-panel:not(.image-flashcard-panel) .example-sentence .target-highlight--c2-front{display:inline;font-size:inherit;line-height:inherit;font-weight:800;letter-spacing:inherit;vertical-align:baseline;white-space:nowrap;overflow-wrap:normal;word-break:normal;color:inherit;text-decoration:none;background:var(--accent-soft);padding:0 .12em;border-radius:.26em}@media(max-width:720px){.flashcard-panel:not(.image-flashcard-panel) .sentence-front-frame,.flashcard-panel:not(.image-flashcard-panel) .example-sentence{width:100%;max-width:100%}.flashcard-panel:not(.image-flashcard-panel) .example-sentence{font-size:clamp(1.08rem,5vw,1.18rem);line-height:1.5}}@media(min-width:721px){.image-flashcard-panel .card-back{padding:clamp(28px,3.8vw,44px) clamp(34px,5vw,58px)}.image-flashcard-panel .card-back-content--image-words{gap:clamp(20px,2.4dvh,30px)}.picture-story-header h2{font-size:clamp(1.45rem,2.45vw,1.9rem);line-height:1.22}.picture-story-body{gap:clamp(20px,2.5dvh,30px)}.picture-story-copy{gap:clamp(18px,2.2dvh,28px)}.story-segment-text{font-size:clamp(1.25rem,2.18vw,1.58rem);line-height:1.84}.story-segment-text--zh{font-size:clamp(1.16rem,1.95vw,1.42rem);line-height:1.86}.picture-story-translation-toggle{padding:9px 14px;font-size:clamp(.95rem,1.45vw,1.08rem)}}.flashcard-panel .card-back-content--word-only{justify-content:center;align-items:center;gap:0;padding-bottom:0;text-align:center}.audio-chip{border:1px solid var(--accent-border);border-radius:999px;background:#fff;color:var(--accent-strong);font-size:.78rem;font-weight:800;line-height:1.2}.audio-chip:disabled{opacity:.62;cursor:not-allowed}.image-flashcard-panel .nav-button{padding:8px 10px}.image-word-list--bound{display:grid;align-content:start;gap:8px;width:100%;min-height:0;max-height:100%;margin:0;padding:1px 3px 8px 0;flex:1 1 auto;overflow-y:auto;list-style:none;scrollbar-gutter:stable}.image-word-list--bound li+li{margin-top:0}.image-word-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center;min-height:58px;border:1px solid rgba(96,122,86,.2);border-radius:14px;padding:9px 10px;background:#ffffffe6;box-shadow:0 10px 24px #344a2b14}.image-word-actions{display:flex;align-items:center;gap:8px;min-width:96px;justify-content:flex-end}.image-word-audio-button,.image-word-flashcard-button{display:inline-grid;place-items:center;width:44px;min-width:44px;height:44px;border:1px solid var(--accent-border);border-radius:999px;padding:0;background:var(--accent-soft);color:var(--accent-strong);font-size:.9rem;font-weight:850;line-height:1}.image-word-audio-button:disabled,.image-word-flashcard-button:disabled{cursor:not-allowed;opacity:.56}.image-word-audio-button:not(:disabled):hover,.image-word-audio-button:not(:disabled):focus-visible,.image-word-flashcard-button:not(:disabled):hover,.image-word-flashcard-button:not(:disabled):focus-visible{background:var(--accent-soft)}.image-word-flashcard-button{font-weight:850;line-height:1.25}.image-word-missing-badge{display:inline-grid;min-width:34px;min-height:24px;place-items:center;border:1px dashed rgba(217,119,6,.42);border-radius:999px;padding:0 6px;background:#fff7edf0;color:#b45309;font-size:.75rem;font-weight:850;line-height:1;white-space:nowrap}.image-word-copy{min-width:0}.image-word-flashcard-button{font-size:1rem}.image-word-zh{margin:0 0 2px;color:#d97706;font-size:1rem;font-weight:750;line-height:1.2;overflow-wrap:anywhere}.image-word-de{margin:0;color:var(--accent-strong);font-size:1.0625rem;font-weight:850;line-height:1.2;overflow-wrap:anywhere;word-break:break-word}.image-word-list--dense{gap:6px;padding-bottom:4px}.image-word-list--dense .image-word-card{gap:6px;min-height:54px;border-radius:12px;padding:9px 10px;box-shadow:0 6px 16px #344a2b0f}.image-word-list--dense .image-word-zh{margin-bottom:1px;font-size:.9375rem;line-height:1.18}.image-word-list--dense .image-word-de{font-size:1rem;line-height:1.18}.image-word-list--dense .image-word-missing-badge{padding-inline:5px;font-size:.75rem}.image-word-list--very-dense{gap:6px}.image-word-list--very-dense .image-word-card{padding-block:9px}.image-word-empty{margin:0;color:var(--text-muted);font-weight:700;text-align:center}.picture-story-header h2{margin:2px 0 0;color:var(--accent-strong);font-size:clamp(1.05rem,2.2vw,1.35rem)}.picture-story-copy{display:grid;gap:7px;min-height:0;overflow-y:auto;padding-right:3px}.story-segment-text{margin:0;color:var(--text-strong);font-size:clamp(.92rem,1.7vw,1.04rem);line-height:1.55}.story-segment-link{border:0;border-bottom:2px solid var(--accent-border);padding:0 2px;background:var(--accent-soft);color:var(--accent-strong);font:inherit;font-weight:800;cursor:pointer}.picture-story-translation-toggle{align-self:start;border:1px solid var(--accent-border);border-radius:999px;padding:7px 11px;background:#fff;color:var(--accent-strong);font-weight:800}.picture-story-copy--translation{border-top:1px solid rgba(96,122,86,.18);padding-top:7px}.flashcard-return-link{justify-self:start;border:1px solid var(--accent-border);background:#fff}.flashcard-audio-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}.audio-chip{padding:7px 11px}@media(max-width:520px){.image-flashcard-panel .card-back{padding:10px 10px 12px}.image-flashcard-panel .card-back-content--image-words{gap:5px}.image-flashcard-panel .nav-button{padding:7px 8px;font-size:.95rem}.image-word-card{grid-template-columns:minmax(0,1fr) auto;padding:9px 10px}.image-word-zh{font-size:1rem;line-height:1.2}.image-word-de{font-size:1.0625rem;line-height:1.2}.image-word-list--dense .image-word-card{padding:9px 10px}.image-word-list--dense .image-word-zh{font-size:.9375rem}.image-word-list--dense .image-word-de{font-size:1rem}.image-word-list--dense .image-word-missing-badge{font-size:.75rem}}.topic-detail-page-shell--image{width:min(100%,1240px);height:100dvh;max-height:100dvh;min-height:0;grid-template-rows:auto minmax(0,1fr);gap:8px;padding:10px;overflow-x:hidden;overflow-y:auto;overscroll-behavior-y:contain}.topic-detail-page-shell--image .memory-panel--reader{height:100%;min-height:0;padding:6px 0 0}.topic-detail-page-shell--image .slide-deck--reader .memory-deck-frame{width:100%;max-width:none}.image-flashcard-panel{display:grid;grid-template-rows:minmax(0,1fr) auto;gap:clamp(14px,2.2dvh,24px);height:100%;min-height:0;padding:0 0 max(8px,env(safe-area-inset-bottom))}.image-flashcard-panel .card-shell{width:100%;height:100%;min-width:0;min-height:0;max-width:100%;max-height:100%;aspect-ratio:auto;align-self:stretch;justify-self:stretch;margin-inline:auto;overflow:hidden;touch-action:pan-y;overscroll-behavior-x:contain;cursor:default}.image-flashcard-panel .card-surface,.image-flashcard-panel .card-front,.image-flashcard-panel .card-back{width:100%;height:100%;min-width:0;min-height:0}.image-flashcard-panel .card-front{padding:0}.image-flashcard-panel .card-front-content--image{width:100%;height:100%;min-width:0;min-height:0;justify-content:stretch;align-items:stretch;gap:0}.image-flashcard-panel .card-front-image{position:absolute;top:0;right:0;bottom:0;left:0;display:block;width:100%;height:100%;max-width:100%;max-height:100%;margin:0;object-fit:contain;object-position:center center;border-radius:0;background:transparent}.image-flashcard-panel .controls{position:static;align-self:end;flex:0 0 auto;padding-top:0;padding-bottom:0;margin-top:0;background:transparent}.image-flashcard-panel .card-back{padding:clamp(16px,2.2vw,24px) clamp(16px,2.6vw,30px) clamp(18px,2.4vw,26px);border:0;background:transparent;box-shadow:none}.image-flashcard-panel .card-back-content--image-words{display:flex;flex-direction:column;justify-content:flex-start;align-items:stretch;gap:clamp(12px,1.8dvh,18px);height:100%;min-height:0;overflow:hidden}.picture-story-header{display:flex;align-items:flex-start;justify-content:space-between;gap:clamp(12px,2cqw,22px);flex:0 0 auto;width:100%;text-align:left}.picture-story-header h2{margin:0;color:var(--text-main);font-size:clamp(1.12rem,2vw,1.42rem);line-height:1.22;font-weight:800;min-width:0;flex:1 1 auto}.picture-story-header-actions{display:inline-flex;align-items:center;justify-content:flex-end;gap:8px;flex:0 0 auto}.picture-story-audio-button{flex:0 0 auto;border:1px solid rgba(36,49,33,.14);background:#fff;color:#243121c7;font-size:.82rem;white-space:nowrap}.picture-story-audio-button--header{padding:7px 11px;font-size:.84rem}.picture-card-media{position:relative;display:grid;place-items:center;width:100%;height:100%;min-width:0;min-height:0;flex:1 1 0;overflow:hidden}.picture-story-audio-footer{display:flex;flex:0 0 auto;justify-content:center;width:100%;margin-top:auto;padding-top:clamp(8px,1.2dvh,12px)}.picture-story-scroll-region{display:flex;flex-direction:column;align-items:stretch;gap:clamp(10px,1.4dvh,16px);width:100%;min-height:0;flex:1 1 auto;overflow-y:auto;overflow-anchor:none;scrollbar-gutter:stable;text-align:left}.picture-story-reading-area{display:flex;flex-direction:column;align-items:stretch;gap:clamp(10px,1.4dvh,16px);width:100%;min-height:0;flex:0 0 auto;overflow:visible;overflow-anchor:none;text-align:left}.picture-story-scroll{display:grid;align-content:start;justify-items:stretch;gap:clamp(10px,1.4dvh,16px);width:100%;max-width:none;min-height:0;flex:0 0 auto;margin-inline:0;overflow:visible;overflow-anchor:none;text-align:left}.picture-story-body{display:grid;align-content:start;justify-items:start;gap:clamp(10px,1.5dvh,16px);width:100%;min-height:0;flex:0 0 auto;overflow:visible;overflow-anchor:none;text-align:left}.picture-story-copy{display:grid;gap:clamp(8px,1dvh,12px);min-height:0;overflow:visible;padding-right:0;text-align:left}.story-segment-text{margin:0;color:var(--text-main);font-size:clamp(1rem,1.65vw,1.16rem);line-height:1.82;text-align:left}.story-segment-text--zh{color:#243121c2;font-size:clamp(.95rem,1.55vw,1.08rem);line-height:1.84}.story-segment-link{display:inline;-moz-appearance:none;appearance:none;-webkit-appearance:none;border:0;padding:0;background:transparent;color:inherit;font:inherit;font-weight:900;line-height:inherit;text-align:left;white-space:normal;overflow-wrap:normal;word-break:normal;cursor:pointer}.story-segment-link:hover,.story-segment-link:focus-visible{color:var(--accent-strong);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:.18em}.picture-story-translation-toggle{justify-self:start;align-self:start;position:static;margin:0;border:1px solid rgba(36,49,33,.14);border-radius:999px;padding:7px 11px;background:#fff;color:#243121c7;font-size:.84rem;font-weight:800;white-space:nowrap}.picture-story-copy--translation{margin-top:clamp(8px,1.5cqw,14px);border-top:1px solid rgba(36,49,33,.1);padding-top:clamp(12px,2dvh,18px);gap:0}@media(max-width:720px){.topic-detail-page-shell--image{gap:4px;padding:8px 6px}.topic-detail-page-shell--image .memory-panel--reader{padding-top:0}.image-flashcard-panel{gap:16px;padding-bottom:max(6px,env(safe-area-inset-bottom))}.image-flashcard-panel .card-back{padding:16px 14px 18px;border-radius:18px}.picture-story-header{align-items:center;gap:10px}.picture-story-header-actions{gap:6px}.picture-story-header h2{font-size:clamp(1.04rem,5vw,1.24rem)}.picture-story-translation-toggle,.picture-story-audio-button--header{padding:6px 9px;font-size:.78rem}.story-segment-text{font-size:clamp(.98rem,4.4vw,1.08rem);line-height:1.74}.story-segment-text--zh{font-size:clamp(.94rem,4.1vw,1.02rem);line-height:1.78}}@media(min-width:721px){.image-flashcard-panel--scaled-back .card-shell--scaled-back-active{width:min(100%,1180px);max-width:calc(100vw - 40px);aspect-ratio:auto;container-type:inline-size}.image-flashcard-panel--scaled-back .card-back{padding:clamp(22px,4.6cqw,34px) clamp(24px,5.8cqw,42px)}.image-flashcard-panel--scaled-back .card-back-content--image-words{gap:clamp(16px,3.4cqw,26px)}.image-flashcard-panel--scaled-back .picture-story-header h2{font-size:clamp(1.38rem,2.7vw,1.95rem);font-size:clamp(1.38rem,5.2cqw,2.1rem);line-height:1.18}.image-flashcard-panel--scaled-back .picture-story-reading-area,.image-flashcard-panel--scaled-back .picture-story-body,.image-flashcard-panel--scaled-back .picture-story-scroll{gap:clamp(10px,2cqw,16px)}.image-flashcard-panel--scaled-back .picture-story-copy{gap:clamp(8px,1.4cqw,12px)}.image-flashcard-panel--scaled-back .picture-story-reading-area--translation-visible{padding-right:2px}.image-flashcard-panel--scaled-back .picture-story-reading-area--translation-visible .picture-story-copy--translation{padding-top:clamp(16px,3cqw,22px)}.image-flashcard-panel--scaled-back .story-segment-text{font-size:clamp(1.24rem,2.35vw,1.7rem);font-size:clamp(1.24rem,4.7cqw,1.86rem);line-height:1.62}.image-flashcard-panel--scaled-back .story-segment-text--zh{font-size:clamp(1.14rem,2.05vw,1.52rem);font-size:clamp(1.14rem,4.15cqw,1.64rem);line-height:1.68}.image-flashcard-panel--scaled-back .picture-story-translation-toggle,.image-flashcard-panel--scaled-back .picture-story-audio-button--header{padding:9px 14px;font-size:clamp(.98rem,2.35cqw,1.12rem)}.image-flashcard-panel--scaled-back .image-word-list--bound{gap:clamp(8px,1.9cqw,14px);padding-right:6px}.image-flashcard-panel--scaled-back .image-word-card{gap:clamp(10px,2.2cqw,16px);border-radius:18px;padding:clamp(9px,2.2cqw,14px) clamp(11px,2.8cqw,18px)}.image-flashcard-panel--scaled-back .image-word-zh{margin-bottom:4px;font-size:clamp(1.02rem,2vw,1.36rem);font-size:clamp(1.02rem,3.75cqw,1.5rem);line-height:1.26}.image-flashcard-panel--scaled-back .image-word-de{font-size:clamp(1.1rem,2.15vw,1.46rem);font-size:clamp(1.1rem,4.05cqw,1.62rem);line-height:1.22}.image-flashcard-panel--scaled-back .image-word-audio-button,.image-flashcard-panel--scaled-back .image-word-flashcard-button{width:clamp(44px,7.2cqw,56px);min-width:clamp(44px,7.2cqw,56px);height:clamp(44px,7.2cqw,56px);font-size:clamp(1.04rem,2.5cqw,1.22rem)}.image-flashcard-panel--scaled-back .image-word-list--dense .image-word-card{padding:clamp(9px,1.7cqw,11px) clamp(9px,2.2cqw,14px)}.image-flashcard-panel--scaled-back .image-word-list--dense .image-word-zh{font-size:clamp(.94rem,3.2cqw,1.26rem)}.image-flashcard-panel--scaled-back .image-word-list--dense 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h2{margin:0;color:var(--homepage-ink);font-size:clamp(1.35rem,3.3vw,2rem);letter-spacing:-.03em}.homepage-preview{margin-top:clamp(28px,5vw,56px)}.homepage-preview__controls{display:flex;align-items:center;gap:8px}.homepage-icon-button{display:inline-grid;width:40px;height:40px;place-items:center;border:1px solid var(--homepage-border);border-radius:50%;background:#fff;color:var(--homepage-ink);font-size:1.7rem;line-height:1;cursor:pointer}.homepage-preview__count{min-width:48px;color:var(--homepage-muted);font-size:.82rem;font-variant-numeric:tabular-nums;text-align:center}.homepage-preview__viewport{display:grid;grid-auto-flow:column;grid-auto-columns:100%;gap:0;width:100%;max-width:100%;overflow-x:auto;padding:2px 0 12px;scroll-snap-type:x mandatory;scroll-padding-inline:0;scrollbar-width:thin;overscroll-behavior-x:contain;touch-action:pan-x 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