:root{--win-dark:#0f1b3d;--win-dark2:#16265a;--brand-blue:#1878ea;--accent-orange:#ff8a3d;--border:#e7eaf0;--bg:#e9ecf3;--text:#1b2030;--text-dim:#7a8296}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;font-size:14px}.topbar{background:var(--win-dark);color:#fff;align-items:center;gap:14px;height:52px;padding:0 18px;display:flex}.logo-mark{align-items:center;gap:8px;font-size:15px;font-weight:800;display:flex}.logo-mark .bolt{background:var(--brand-blue);color:#fff;border-radius:4px;justify-content:center;align-items:center;width:20px;height:20px;font-size:12px;display:flex}.org-name{color:#c7cfe6;align-items:center;gap:5px;font-size:13px;display:flex}.role-tag{color:#dfe4f5;background:#ffffff1f;border-radius:12px;padding:3px 10px;font-size:12px}.top-right{align-items:center;gap:16px;margin-left:auto;display:flex}.top-right .icon{color:#c7cfe6;width:18px;height:18px}.switch-app{color:#fff;background:#ffffff1f;border-radius:14px;padding:5px 12px;font-size:12px}.shell{height:100vh;display:flex}.side{background:var(--bg);color:var(--text);flex-shrink:0;padding:20px 14px}.side-avatar{background:var(--brand-blue);border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;margin:0 auto 10px;font-size:20px;display:flex}.side-name{text-align:center;color:var(--text);font-size:13.5px;font-weight:600}.side-grade{text-align:center;color:var(--text-dim);margin-top:2px;margin-bottom:14px;font-size:11.5px}.side-nav{flex-direction:column;gap:4px;display:flex}.side-nav-item{color:#5f6879;cursor:pointer;border-radius:8px;padding:9px 11px;font-size:13px;transition:color .12s,background .12s}.side-nav-item:hover{color:var(--text);background:#ffffffbf}.side-nav-item.on{color:#fff;background:#1b2233;font-weight:600}.side{overflow-y:auto}.sidebar-toggle{border:1px solid var(--border);width:100%;min-height:36px;color:var(--text-dim);font:inherit;cursor:pointer;background:0 0;border-radius:8px;justify-content:center;align-items:center;gap:8px;margin-bottom:16px;font-size:12px;display:flex}.sidebar-toggle svg{flex-shrink:0;width:20px;height:20px}.sidebar-toggle:hover{color:var(--text);background:#fff}button.side-nav-item{text-align:left;background:0 0;border:0;align-items:center;gap:9px;width:100%;font-family:inherit;display:flex}button.side-nav-item.on{color:#fff;background:#1b2233}button.side-nav-item:not(:disabled):hover{color:var(--text);background:#fff}button.side-nav-item.on:hover{color:#fff;background:#303a4e}.side-nav-item svg,.side-logout svg{flex-shrink:0;width:18px;height:18px}.side-logout{width:100%;color:var(--text-dim);cursor:pointer;background:0 0;border:0;border-radius:8px;justify-content:center;align-items:center;gap:8px;margin-bottom:8px;padding:8px;display:flex}.side-logout:hover{background:#fff}.sidebar-toggle:focus-visible,.side-nav-item:focus-visible,.side-logout:focus-visible{outline:2px solid var(--brand-blue);outline-offset:2px}.side.collapsed{padding:20px 8px}.side.collapsed .side-avatar{width:36px;height:36px;font-size:16px}.side.collapsed .side-nav-item{justify-content:center;padding:12px 0}.side.collapsed .side-nav-item svg{width:20px;height:20px}.main{flex:1;min-width:0;padding:22px;overflow-y:auto}.page{display:none}.page.show{display:block}.plan-card{border:1px solid var(--border);background:linear-gradient(135deg,#fff,#fff);border-radius:12px;align-items:center;gap:16px;margin-bottom:16px;padding:18px 20px;display:flex}.plan-badge{background:linear-gradient(135deg,var(--accent-orange),#ffb066);color:#fff;border-radius:10px;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;width:70px;height:70px;font-size:12px;font-weight:700;display:flex}.plan-badge .no{opacity:.85;margin-top:2px;font-size:10px;font-weight:400}.plan-info{flex:1}.plan-title-row{align-items:center;gap:8px;display:flex}.plan-title{font-size:17px;font-weight:700}.plan-tag{color:var(--accent-orange);background:#fff0e5;border-radius:10px;padding:2px 8px;font-size:11px}.plan-meta{color:var(--text-dim);gap:16px;margin-top:6px;font-size:12px;display:flex}.plan-actions{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:8px;display:flex}.plan-link{color:var(--brand-blue);cursor:pointer;font-size:12px}.btn-primary{background:var(--brand-blue);color:#fff;cursor:pointer;border:none;border-radius:20px;padding:9px 18px;font-size:13px;font-weight:600}.article-list{border:1px solid var(--border);background:#fff;border-radius:12px;overflow:hidden}.article-row{cursor:pointer;border-bottom:1px solid #f0f1f5;align-items:center;gap:14px;padding:14px 18px;display:flex}.article-row:last-child{border-bottom:none}.article-row:hover{background:#fafbfd}.article-num{width:26px;height:26px;color:var(--text-dim);background:#eef0f4;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.article-row.done .article-num{color:#1a8a3d;background:#e6f6ea}.article-preview{color:var(--text);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;overflow:hidden}.article-status{background:var(--accent-orange);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;display:flex}.article-row.done .article-status{background:#2fb872}.article-type{border-radius:8px;flex-shrink:0;padding:3px 9px;font-size:11px;font-weight:600}.article-type.textbook{color:var(--brand-blue);background:#eef3ff}.article-type.reading{color:var(--accent-orange);background:#fff0e5}.article-type.cloze{color:#7c4dcc;background:#f3ecff}.article-type.heptachoice{color:#1a8a3d;background:#e6f6ea}.article-type.grammar{color:#c62828;background:#fde8e8}.mytasks-hint{color:var(--text-dim);margin-bottom:14px;font-size:12.5px}.mytasks-empty{text-align:center;color:var(--text-dim);border:1px solid var(--border);background:#fff;border-radius:12px;padding:40px 0;font-size:13px}.task-item{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:12px;align-items:center;gap:16px;margin-bottom:12px;padding:16px 20px;display:flex}.task-item:hover{border-color:var(--brand-blue)}.task-item.overdue{background:#fff8f8;border-color:#f3c6c6}.task-item.done{opacity:.7}.task-icon{width:44px;height:44px;color:var(--brand-blue);background:#eef3ff;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;font-size:18px;display:flex}.task-item.overdue .task-icon{color:#c62828;background:#fde8e8}.task-item.done .task-icon{color:#1a8a3d;background:#e6f6ea}.task-main{flex:1;min-width:0}.task-name-row{align-items:center;gap:8px;display:flex}.task-name{color:var(--text);font-size:14.5px;font-weight:700}.task-mode{color:var(--text-dim);background:#f2f4f8;border-radius:8px;padding:1px 8px;font-size:11px}.task-plan-tag{color:var(--brand-blue);background:#eef3ff;border-radius:8px;padding:1px 7px;font-size:10.5px}.task-plan-tag.direct{color:#a5720a;background:#fff4d9}.task-meta{color:var(--text-dim);flex-wrap:wrap;gap:14px;margin-top:5px;font-size:12px;display:flex}.task-meta .overdue-text{color:#c62828;font-weight:600}.task-progress-wrap{flex-shrink:0;width:110px}.task-progress-num{color:var(--text-dim);text-align:right;margin-bottom:4px;font-size:12px}.task-progress-bar{background:#eef0f4;border-radius:3px;height:6px;overflow:hidden}.task-progress-fill{background:var(--brand-blue);height:100%}.task-item.done .task-progress-fill{background:#2fb872}.task-status-tag{border-radius:10px;flex-shrink:0;padding:3px 10px;font-size:11.5px}.task-status-tag.ongoing{color:var(--brand-blue);background:#eef3ff}.task-status-tag.todo{color:var(--text-dim);background:#f2f4f8}.task-status-tag.overdue{color:#c62828;background:#fde8e8}.task-status-tag.done{color:#1a8a3d;background:#e6f6ea}.mytasks-divider{color:var(--text-dim);border-top:1px dashed var(--border);margin:18px 0 10px;padding-top:10px;font-size:12px}.hard-sentence{color:#c9691c;cursor:pointer;background:#fff0e0;border-radius:3px;padding:1px 2px}.exercise-tabs{gap:8px;margin-bottom:14px;display:flex}.exercise-tab{color:var(--text-dim);border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:16px;padding:7px 16px;font-size:12.5px}.exercise-tab.on{background:var(--brand-blue);color:#fff;border-color:var(--brand-blue);font-weight:600}.blank-marker{color:var(--brand-blue);cursor:pointer;background:#eef3ff;border-radius:4px;padding:0 5px;font-size:13px;font-weight:700;display:inline-block}.blank-marker.answered{color:#1a8a3d;background:#e6f6ea}.blank-marker.current{background:var(--accent-orange);color:#fff}.qa-grid{grid-template-columns:repeat(6,1fr);gap:6px;margin-bottom:14px;display:grid}.qa-grid-item{aspect-ratio:1;color:var(--text-dim);cursor:pointer;background:#eef0f4;border-radius:6px;justify-content:center;align-items:center;font-size:11.5px;font-weight:600;display:flex}.qa-grid-item.on{background:var(--brand-blue);color:#fff}.qa-grid-item.answered{color:#1a8a3d;background:#e6f6ea}.qa-grid-item.on.answered{background:var(--brand-blue);color:#fff}.qa-pool{flex-direction:column;gap:8px;margin-bottom:16px;display:flex}.qa-pool-item{border:1px solid var(--border);color:var(--text);cursor:pointer;border-radius:8px;padding:9px 12px;font-size:12.5px;line-height:1.5}.qa-pool-item .letter{color:var(--brand-blue);margin-right:6px;font-weight:700}.qa-pool-item.used{opacity:.35}.qa-pool-item.current-pick{border-color:var(--brand-blue);background:#eef3ff}.qa-text-input{border:1px solid var(--border);border-radius:8px;width:100%;height:42px;margin-bottom:6px;padding:0 12px;font-size:14px}.qa-hint-line{color:var(--text-dim);margin-bottom:10px;font-size:12px}.back{color:var(--text-dim);cursor:pointer;align-items:center;gap:6px;margin-bottom:14px;font-size:13px;display:flex}.back svg{width:14px;height:14px}.result-mask{z-index:50;background:#0f14288c;justify-content:center;align-items:center;display:none;position:fixed;inset:0}.result-mask.show{display:flex}.result-box{text-align:center;background:#fff;border-radius:16px;width:340px;padding:30px 26px}.result-score{color:var(--brand-blue);margin:6px 0;font-size:40px;font-weight:800}.result-sub{color:var(--text-dim);margin-bottom:20px;font-size:13px}.engagement-warn{color:#a5720a;background:#fff4d9;border-radius:8px;margin:-10px 0 16px;padding:8px 10px;font-size:11.5px;line-height:1.6;display:block}.result-box .btn-primary{width:100%}svg{display:block}.muted{color:var(--text-dim,#7a8296);font-size:12px}.side-nav-item.disabled{opacity:.45;cursor:not-allowed}.reading-head{flex-wrap:wrap;align-items:baseline;gap:10px;padding:2px 0 10px;font-size:17px;font-weight:700;display:flex}.reading-head .back{border-right:1px solid var(--border,#e7eaf0);color:var(--text-dim,#7a8296);align-self:center;margin:0;padding-right:10px;font-size:12.5px;font-weight:400}.reading-head .back:hover{color:var(--text,#1b2030)}.reading-head .muted{background:#f2f4f8;border-radius:20px;padding:2px 10px;font-size:11.5px}.reading-body{background:#fdfbf7;border:1px solid #e9e2d5;border-radius:10px;flex:62%;min-height:140px;padding:28px 30px;overflow-y:auto;box-shadow:0 1px 3px #50402812,0 10px 26px -14px #5040281f}.passage{text-align:justify;-webkit-hyphens:auto;hyphens:auto;color:#2c2a26;max-width:68ch;margin:0 auto;font-family:Iowan Old Style,Palatino Linotype,Palatino,Book Antiqua,Georgia,Songti SC,serif;font-size:16.5px;line-height:1.95}.passage .mark-btn,.passage .pin-btn,.passage .explain-btn,.passage .q-slot{font-family:PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif}.passage p{margin:0 0 1.15em;padding-left:2.3em;position:relative}.para-no{text-align:right;font-variant-numeric:tabular-nums;color:#b9ad97;-webkit-user-select:none;user-select:none;width:1.5em;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:11.5px;line-height:inherit;position:absolute;top:0;left:0}.word{cursor:pointer;border-radius:3px;padding:0 1px}.word:hover{background:#fff2c2}.hard-sentence.marked{color:inherit;background:#fbf0d8;border-radius:2px}.word.looked{background:#dfe9fa;border-radius:2px}.word.looked:hover{background:#ccdcf6}.mark-btn,.pin-btn,.passage .explain-btn{cursor:pointer;opacity:0;padding:0 3px;font-size:12px;transition:opacity .12s}.sent:hover .mark-btn,.sent:hover .pin-btn,.hard-sentence:hover .mark-btn,.hard-sentence:hover .pin-btn,.hard-sentence:hover .explain-btn{opacity:.45}.mark-btn:hover,.pin-btn:hover,.passage .explain-btn:hover{opacity:1!important}.mark-btn.on{color:#c47510}.pin-btn.on{color:#1857b8}.q-slot{color:#1878ea;white-space:nowrap;letter-spacing:-.02em;cursor:default;font-weight:700}.trace-bar{color:#a08a4a;background:#fff8e8;border:1px solid #f0e2bd;border-radius:20px;flex:none;align-self:center;align-items:center;gap:6px;padding:2px 10px;font-size:11.5px;font-weight:400;display:inline-flex}.trace-bar:before{content:"○";font-size:9px}.trace-bar.done{color:#2e7d4f;background:#eaf5ee;border-color:#c5e2ce}.trace-bar.done:before{content:"●"}.quiz{background:#fdfbf7;border:1px solid #e9e2d5;border-radius:10px;flex:38%;min-height:110px;margin-top:8px;padding:4px 26px;overflow-y:auto;box-shadow:0 1px 3px #50402812,0 10px 26px -14px #5040281f}.choice-pool{background:#f6f2e8;border:1px solid #e6ddca;border-radius:8px;max-width:68ch;margin:12px auto;padding:11px 15px 11px 2.3em;font-size:16.5px}.pool-item{color:#2c2a26;padding:3px 0;font-size:14px;line-height:1.65}.pool-item.used{opacity:.38;text-decoration:line-through}.q-item{box-shadow:none;background:0 0;border:none;border-bottom:1px solid #efe8db;border-radius:0;max-width:68ch;margin:0 auto;padding:14px 0 14px 2.3em;font-size:16.5px;position:relative}.q-item:last-child{border-bottom:none}.q-stem>b:first-child{text-align:right;font-variant-numeric:tabular-nums;color:#6b6357;width:1.5em;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:12.5px;font-weight:700;position:absolute;left:0}.q-item,.choice-pool,.q-stem,.q-options label,.q-blank{font-family:Iowan Old Style,Palatino Linotype,Palatino,Book Antiqua,Georgia,Songti SC,serif}.q-stem{color:#2c2a26;margin-bottom:8px;font-size:15px;line-height:1.7}.q-hint{color:#8f877c;font-size:12.5px}.q-options{flex-direction:column;gap:6px;display:flex}.q-options.inline{flex-flow:wrap;gap:10px}.q-options label{cursor:pointer;color:#2c2a26;border-radius:6px;align-items:baseline;gap:6px;padding:5px 8px;font-size:14.5px;line-height:1.6;display:flex}.q-options label:hover{background:#f5f1e8}.q-options label.on{background:#f1ece0;box-shadow:inset 0 0 0 1px #c9a86a}.q-blank{color:#2c2a26;background:0 0;border:none;border-bottom:1px solid #c9bda6;border-radius:0;width:100%;padding:4px 6px;font-size:15px}.q-blank:focus{background:#f7f3e9;border-bottom-color:#1878ea;outline:none}.q-blank::placeholder{color:#bdb3a2}.q-item.q-row{align-items:center;gap:0;padding:8px 0 8px 2.3em;display:flex}.q-item.q-row .q-hint{margin-right:12px}.q-item.q-row .q-stem{flex:none;margin-bottom:0}.q-item.q-row .q-options{flex:1}.q-item.q-row .q-blank{flex:0 260px;width:auto}.q-item.q-row .q-options:not(.inline){grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:2px 6px;display:grid}.submit-bar{flex:none;justify-content:flex-end;align-items:center;gap:12px;padding:12px 0 4px;display:flex}.engage-tip{color:#7a5b12;background:#fdf6e3;border:1px solid #f0dca8;border-radius:9px;margin:8px 0;padding:10px 13px;font-size:13px}.engage-tip.error{color:#a03030;background:#fdeaea;border-color:#f0b8b8}.result-head{justify-content:space-between;align-items:baseline;padding:14px 0;display:flex}.result-title{font-size:16px;font-weight:600}.result-score{color:#1878ea;font-size:22px;font-weight:700}.result-score .rate{color:var(--text-dim,#7a8296);font-size:13px;font-weight:500}.review-tip{color:#14508f;background:#eaf2fd;border:1px solid #bcd6f7;border-radius:9px;margin-bottom:10px;padding:10px 13px;font-size:13px}.result-table{border-collapse:collapse;background:#fff;width:100%;font-size:13px}.result-table th,.result-table td{border-bottom:1px solid var(--border,#e7eaf0);text-align:left;padding:7px 10px}.res-correct{color:#2f9e44;font-weight:700}.res-wrong{color:#d64545;font-weight:700}.res-review{color:#e08a1e}.res-unanswered{color:var(--text-dim,#7a8296)}.trace-summary{color:var(--text-dim,#7a8296);padding:12px 2px 24px;font-size:12px}.op-object{color:#1857b8}.op-action{color:#d1481f;font-weight:600}.op-modifier{color:#2e8b4f}.op-marker{color:#a8aebb}.sh-mask{z-index:60;background:#10141e6b;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.sh-box{background:#fff;border-radius:14px;width:min(620px,100%);max-height:80vh;padding:20px 22px;position:relative;overflow-y:auto}.sh-close{cursor:pointer;color:#9aa0ad;font-size:15px;position:absolute;top:12px;right:14px}.sh-title{margin-bottom:14px;font-size:15px;font-weight:600}.sh-empty{color:#8a90a0;padding:12px 0;font-size:13px}.sh-head{color:#8a90a0;background:#fafbfd;border:1px solid #eceef3;border-radius:8px;align-items:center;gap:16px;margin-bottom:10px;padding:8px 11px;font-size:11.5px;display:flex}.sh-head b{color:#3a4150;font-size:13px}.sh-hint{color:#c47510;background:#fff4e5;border:1px solid #f0d5ac;border-radius:8px;padding:1px 7px}.sh-layers{border:1px solid #eceef3;border-radius:10px;overflow:hidden}.sh-layer{grid-template-columns:44px 1fr auto;align-items:baseline;gap:8px;padding:6px 12px;display:grid}.sh-no{color:#c2c7d2;font-variant-numeric:tabular-nums;white-space:nowrap;font-size:11px}.sh-mark{margin-left:1px}.sh-uplink{color:#c47510}.sh-continues{color:#1878ea}.sh-coordinate{color:#2f8f3f}.sh-body{font-size:14.5px;line-height:1.85}.sh-paren{color:#b6bcc9;font-weight:700}.sh-label{color:#b9bec9;white-space:nowrap;font-size:11px}.sh-legend{color:#6b7280;flex-wrap:wrap;align-items:center;gap:16px;margin-top:12px;font-size:11.5px;display:flex}.sh-legend>span{align-items:center;gap:4px;display:inline-flex}.sh-dot{border-radius:2px;width:9px;height:9px;display:inline-block}.sh-dot.op-object{background:#1857b8}.sh-dot.op-action{background:#d1481f}.sh-dot.op-modifier{background:#2e8b4f}.sh-dot.op-marker{background:#a8aebb}.sh-legend-hint{color:#a3a9b6}.sh-note{color:#8a90a0;border-top:1px solid #eceef3;margin-top:12px;padding-top:10px;font-size:11.5px;line-height:1.85}.sh-note b{color:#3a4150;font-weight:600}.sh-note>summary{cursor:pointer;color:#9aa0ad;-webkit-user-select:none;user-select:none;font-size:11px;list-style:none}.sh-note>summary::-webkit-details-marker{display:none}.sh-note>summary:before{content:"▸ "}.sh-note[open]>summary{margin-bottom:6px}.sh-note[open]>summary:before{content:"▾ "}.explain-btn{color:var(--brand,#2563eb);cursor:pointer;white-space:nowrap;margin-left:4px;font-size:11px}.explain-btn:hover{text-decoration:underline}.wp{z-index:70;background:#fff;border:1px solid #eceef3;border-radius:10px;width:280px;padding:12px 14px;position:fixed;box-shadow:0 8px 28px #10141e2e}.wp-loading,.wp-miss{color:#8a90a0;font-size:12.5px}.wp-head{flex-wrap:wrap;align-items:baseline;gap:7px;margin-bottom:6px;display:flex}.wp-head b{color:#1a2233;font-size:16px}.wp-ph{color:#8a90a0;font-size:12px}.wp-from{color:#8a90a0;background:#f2f3f6;border-radius:8px;padding:1px 6px;font-size:10.5px}.wp-tags{flex-wrap:wrap;gap:4px;margin-bottom:7px;display:flex}.wp-tag{color:#c47510;background:#fff4e5;border:1px solid #f0d5ac;border-radius:8px;padding:1px 7px;font-size:10.5px}.wp-senses{color:#2b3242;font-size:13px;line-height:1.85}.wp-sense+.wp-sense{margin-top:2px}.wp-pos{color:#2e8b4f;margin-right:5px;font-size:11.5px}.page.show.reading-page{flex-direction:column;height:100%;display:flex}.reading-page .reading-grid{flex:1;min-height:0}.reading-grid{grid-template-columns:minmax(0,780px) 10px var(--rail,264px);grid-template-rows:minmax(0,1fr);justify-content:center;align-items:stretch;gap:8px;display:grid}@media (width>=1281px){.reading-grid.with-left{grid-template-columns:var(--left,196px) 10px minmax(0,780px) 10px var(--rail,264px)}.reading-left .parts-panel{margin-bottom:0;padding:10px}.reading-left .parts-card{flex:100%;max-width:none}.reading-left .parts-head{margin-bottom:6px;display:block}.reading-left .parts-head>b{display:block}.reading-left .parts-sub{margin-top:1px;line-height:1.5;display:block}.reading-left .parts-chain{padding:4px 8px;font-size:12px;line-height:1.6}.reading-left .parts-cards{gap:6px}.reading-left .parts-draw .parts-row{flex-wrap:wrap}.reading-left .parts-draw .parts-seg{flex:100%;min-width:0}.reading-left .parts-draw-head{flex-wrap:wrap;gap:6px}}@media (width<=1280px){.reading-grid.with-left{grid-template-rows:auto minmax(0,1fr)}.reading-left{grid-column:1/-1;height:auto;overflow:visible}.reading-left .parts-panel{margin-bottom:0}.left-handle{display:none}}.reading-col{flex-direction:column;min-width:0;height:100%;min-height:0;display:flex}.reading-left{min-width:0;min-height:0;overflow:hidden auto}.col-handle{cursor:col-resize;align-self:stretch;position:relative}.col-handle:before{content:"";background:0 0;border-radius:2px;width:2px;transition:background .12s;position:absolute;top:8px;bottom:8px;left:4px}.col-handle:hover:before{background:#c7d3e8}.col-handle.on:before{background:#1878ea}.rail{flex-direction:column;gap:12px;max-height:100%;display:flex;position:sticky;top:0}.rail-box{background:#fff;border:1px solid #e6e9f1;border-radius:10px;flex-direction:column;min-height:0;padding:12px 14px;display:flex}.rail-box:first-child{flex:none;max-height:45%}.rail-box:last-child{flex:auto}.rail-box-head{border-bottom:1px solid #f0f2f6;flex:none;align-items:center;gap:7px;margin-bottom:9px;padding-bottom:8px;display:flex}.rail-box-title{color:#4a5262;font-size:12.5px;font-weight:600}.rail-count{font-variant-numeric:tabular-nums;color:#6b7385;text-align:center;background:#eef0f5;border-radius:20px;min-width:20px;padding:1px 8px;font-size:11px}.rail-empty{color:#98a0ae;text-align:center;flex-direction:column;gap:5px;padding:14px 4px;font-size:11.5px;display:flex}.rail-hint{color:#858d9c;font-size:10.5px;line-height:1.6}.rail-words{flex-wrap:wrap;gap:5px;min-height:0;display:flex;overflow-y:auto}.rail-word{color:#3f5878;cursor:pointer;background:#eef2f9;border-radius:6px;padding:2px 9px;font-size:12px;transition:background .12s}.rail-word:hover{color:#1857b8;background:#e0e7f4}.rail-sents{flex-direction:column;gap:7px;min-height:0;display:flex;overflow-y:auto}.rail-sent{color:#5a6274;cursor:pointer;background:#faf9f7;border:none;border-left:3px solid #e0c091;border-radius:6px;padding:7px 9px;font-size:11.5px;line-height:1.7;transition:background .12s}.rail-sent:hover{color:#2c3242;background:#f4f2ee}.rail-sent-text{-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.rail-sent-go{color:#b8873f;margin-top:4px;font-size:10.5px;font-weight:600;display:block}@media (width<=980px){.reading-grid{grid-template-rows:auto!important;grid-template-columns:minmax(0,1fr)!important}.col-handle{display:none}.page.show.reading-page{height:auto;display:block}.reading-page .reading-grid{flex:none;min-height:0}.reading-col{height:auto}.reading-left{height:auto;overflow:visible}.reading-left .parts-panel{margin-bottom:10px}.reading-body{max-height:52vh}.quiz{max-height:none;overflow:visible}.rail{max-height:none;position:static}.rail-box:first-child{max-height:none}}.link-back{color:#1878ea;cursor:pointer;font-size:12.5px;font-weight:600}.link-back:hover{text-decoration:underline}.side-handle{cursor:col-resize;background:0 0;flex:none;width:8px;position:relative}.side-handle:before{content:"";background:0 0;width:2px;transition:background .12s;position:absolute;top:0;bottom:0;left:3px}.side-handle:hover:before{background:#c2c9d6}.side-handle.on:before{background:#1878ea}.sent.pinned,.hard-sentence.pinned{background:#e2f0e4;border-radius:2px}.hard-sentence.marked.pinned{background:linear-gradient(#fbf0d8 0 62%,#cfe6d4 62% 100%)}.rail-pins .rail-sents{gap:7px}.rail-pin{color:#5a6274;background:#faf9f7;border:none;border-left:3px solid #5a8fd6;border-radius:6px;padding:7px 22px 7px 9px;font-size:11.5px;line-height:1.7;transition:background .12s;position:relative}.rail-pin:hover{color:#2c3242;background:#f2f4f8}.rail-pin-text{display:block}.rail-pin-off{cursor:pointer;color:#9fb0cf;font-size:11px;position:absolute;top:6px;right:6px}.rail-pin-off:hover{color:#1857b8}.word.keyword{background:#c9e6cf;border-radius:2px}.word.keyword:hover{background:#b6dcbf}.word.looked.keyword{background:linear-gradient(#dfe9fa 0 62%,#c9e6cf 62% 100%)}.wp-acts{border-top:1px solid #f0f1f4;gap:6px;margin-top:10px;padding-top:9px;display:flex}.wp-act{cursor:pointer;color:#5a6274;background:#fff;border:1px solid #dde2ea;border-radius:6px;flex:1;padding:5px 6px;font-family:inherit;font-size:11.5px;transition:background .12s,border-color .12s}.wp-act:hover{color:#1857b8;border-color:#a9c3e8}.wp-act.on{color:#1857b8;background:#dfe9fa;border-color:#a9c3e8;font-weight:600}.wp-act.key.on{color:#256b3d;background:#c9e6cf;border-color:#96c9a3}.rail-word{padding-right:18px;position:relative}.rail-word.key{color:#2b6b3c;background:#dcefe0}.rail-word.key:hover{background:#c9e6cf}.rail-word-x{opacity:0;font-size:9px;font-style:normal;transition:opacity .12s;position:absolute;top:50%;right:5px;transform:translateY(-50%)}.rail-word:hover .rail-word-x{opacity:.55}.rail-word-x:hover{opacity:1!important}.citing-bar{z-index:5;color:#21467e;background:#eaf2ff;border:1px solid #c3d8f5;border-radius:8px;align-items:center;gap:10px;margin-bottom:6px;padding:7px 12px;font-size:12.5px;display:flex;position:sticky;top:0}.citing-bar b{color:#1857b8}.citing-hint{color:#6d86ad;margin-left:auto;font-size:11.5px}.passage.citing{cursor:pointer}.passage.citing .word{pointer-events:none}.passage.citing .mark-btn,.passage.citing .pin-btn,.passage.citing .explain-btn{display:none}.passage.citing .sent:hover,.passage.citing .hard-sentence:hover{background:#dbe8fb;border-radius:2px}.passage .cited-here{border-radius:3px;box-shadow:inset 0 0 0 2px #1857b8}.cite-tags{white-space:nowrap;display:inline}.cite-tag{color:#fff;text-align:center;vertical-align:2px;background:#1857b8;border-radius:3px;min-width:15px;margin-left:3px;padding:0 3px;font:600 10px/15px system-ui,-apple-system,sans-serif;display:inline-block}.rail-pin .cite-tags{margin-top:4px;display:block}.rail-pin .cite-tag{margin:0 3px 0 0}.q-cite{flex-wrap:wrap;align-items:baseline;gap:6px;margin-top:8px;display:flex}.q-item.q-row .q-cite{flex:none;margin-top:0}.cite-btn{color:#6b7280;cursor:pointer;background:0 0;border:1px dashed #c8cdd8;border-radius:6px;padding:2px 8px;font-size:11.5px;transition:all .12s}.cite-btn:hover{color:#1857b8;border-color:#1857b8}.cite-btn.on{color:#fff;background:#1857b8;border-style:solid;border-color:#1857b8}.q-cite-sent{color:#4a5568;background:#f4f8ff;border-left:3px solid #5a8fd6;border-radius:5px;flex:100%;padding:4px 22px 4px 9px;font-size:11.5px;line-height:1.65;position:relative}.q-cite-x{cursor:pointer;color:#9fb0cf;font-size:11px;font-style:normal;position:absolute;top:4px;right:6px}.q-cite-x:hover{color:#1857b8}.para-move{text-align:right;color:#c3b8a3;cursor:pointer;-webkit-user-select:none;user-select:none;opacity:0;width:1.5em;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:10px;line-height:1.5;transition:opacity .12s,color .12s;position:absolute;top:1.55em;left:0}.passage p:hover .para-move{opacity:1}.para-move:hover{color:#1857b8}.para-move.on{opacity:1;color:#2e7d4f;text-align:center;letter-spacing:-.02em;background:#eaf5ee;border-radius:3px}.passage.citing .para-move{display:none}.mp{z-index:60;background:#fff;border:1px solid #e2e6ee;border-radius:10px;flex-direction:column;width:252px;max-height:calc(100vh - 16px);padding:8px;font-size:12px;display:flex;position:fixed;box-shadow:0 8px 28px -8px #1e283c38}.mp-head{color:#7a8296;padding:2px 4px 6px;font-size:11.5px}.mp-list{flex-direction:column;gap:1px;min-height:0;display:flex;overflow-y:auto}.mp-item{cursor:pointer;text-align:left;background:0 0;border:none;border-radius:5px;align-items:baseline;gap:7px;width:100%;padding:4px 6px;transition:background .1s;display:flex}.mp-item:hover{background:#f2f5fa}.mp-item.on{background:#eaf5ee}.mp-key{color:#2c3242;flex:none;font-size:12px}.mp-item.on .mp-key{color:#2e7d4f}.mp-hint{color:#9aa3b2;text-align:right;flex:auto;font-size:10.5px}.mp-foot{color:#9aa3b2;cursor:pointer;border-top:1px solid #eef1f6;margin-top:4px;padding:5px 6px 2px;font-size:10.5px}.mp-foot:hover{color:#1857b8}.chain-box{background:#fdfbf7;border:1px solid #e9e2d5;border-radius:10px;margin:14px 0;padding:12px 14px}.chain-head{color:#6b6558;align-items:baseline;gap:8px;margin-bottom:9px;font-size:12.5px;display:flex}.chain-sub{color:#a89a80;font-size:11px}.chain{flex-wrap:wrap;align-items:center;gap:2px;display:flex}.chain-link{align-items:center;display:inline-flex}.chain-arrow{color:#c3b8a3;margin:0 6px;font-style:normal}.chain-move{color:#2e7d4f;background:#eaf5ee;border-radius:6px;align-items:baseline;gap:5px;padding:3px 9px;font-size:12px;display:inline-flex}.chain-paras{color:#7fae92;font-size:10.5px;font-style:normal}.chain-diff{flex-direction:column;gap:1px;display:flex}.cd-row{border-radius:5px;grid-template-columns:22px 5.2em 16px minmax(0,1fr);align-items:baseline;gap:8px;padding:4px 6px;font-size:12px;display:grid}.cd-row:hover{background:#f6f2e8}.cd-para{color:#a89a80;text-align:right;font-variant-numeric:tabular-nums;font-size:10.5px}.cd-row.ok .cd-mine,.cd-row.ok .cd-std{color:#8a8578}.cd-mine{color:#b23b2e}.cd-row.ok .cd-mark{color:#2e7d4f}.cd-mark{color:#c3b8a3;text-align:center}.cd-std{color:#2c2a26}.cd-blank{color:#c3b8a3;font-style:normal}.cd-note{color:#8a8578;font-size:11px;line-height:1.6;display:block}.cd-row.skip .cd-mine{color:#a8a294}.cd-row.skip .cd-mark{color:#ddd6c8}.mp-genre{float:right;color:#a8b0c0;font-size:10.5px}.mp-group{color:#a8b0c0;border-top:1px solid #eef1f6;margin-top:3px;padding:7px 4px 2px;font-size:10px}.engage-tip.last-chance{color:#9a4a22;background:#fdf0ea;border-color:#f0c3ad}.engage-tip.last-chance b{color:#c0391a}.engage-tip.done-tip{color:#5a6b80;background:#f3f5f9;border-color:#dde3ec}.q-options label:has(input:disabled){opacity:.55;cursor:default}.q-blank:disabled{color:#97a1b0;cursor:default;background:#f3f5f9}.parts-panel{background:#fbfcfe;border:1px solid #e3e8f0;border-radius:10px;margin-bottom:10px;padding:10px 12px}.parts-head{align-items:baseline;gap:10px;margin-bottom:8px;display:flex}.parts-head b{color:#26313f;font-size:13px}.parts-sub{color:#7d8899;font-size:11.5px}.parts-cards{flex-wrap:wrap;gap:8px;display:flex}.parts-card{flex-direction:column;flex:150px;gap:3px;min-width:130px;max-width:260px;display:flex}.parts-seg{color:#7d8899;padding-left:2px;font-size:11px}.parts-input{box-sizing:border-box;background:#fff;border:1px solid #dbe4f0;border-radius:7px;width:100%;height:32px;padding:2px 10px;font-size:13.5px}.parts-input:focus{border-color:#7fa9ec;outline:none}.parts-input:disabled{color:#5a6b80;cursor:default;background:#f3f5f9}.parts-chain{color:#1d6b40;background:#eef8f2;border-radius:6px;margin-top:8px;padding:4px 10px;font-size:12.5px}.parts-tip{color:#8b7000;margin-top:8px;font-size:12px;line-height:1.6}.parts-draw{margin-top:8px;font-size:12px}.parts-draw-head{flex-wrap:wrap;align-items:baseline;gap:8px;margin-bottom:6px;display:flex}.parts-draw-head b{color:#26313f;font-size:13px;font-weight:600}.parts-draw-head .link{margin-left:auto}.parts-body-no{color:#4a5568;letter-spacing:.2px;font-size:11.5px;font-weight:600}.parts-bound{border-top:1px solid #eef1f6;flex-direction:column;gap:2px;padding:6px 0;display:flex}.parts-bound:first-of-type{border-top:none}.parts-bound-line{color:#7d8899;align-items:center;gap:5px;font-size:12px;display:flex}.parts-input.tiny{width:100%;height:27px;font-size:12px}.read-pane,.quiz-pane{display:contents}.reading-grid.split.with-left{grid-template-columns:var(--left,264px) 10px minmax(0, 1fr)}.reading-grid.split:not(.with-left){grid-template-columns:minmax(0, 1fr) 10px var(--rail,264px)}.reading-col.split{grid-template-columns:minmax(0, 1fr) 10px var(--quiz,460px);grid-template-rows:minmax(0,1fr);gap:0;display:grid}.reading-col.split .read-pane,.reading-col.split .quiz-pane{flex-direction:column;min-width:0;min-height:0;display:flex}.reading-col.split .read-pane{gap:8px}.reading-col.split .reading-body{flex:1;min-height:0}.reading-col.split .quiz{flex:1;min-height:0;max-height:none;margin-top:0}.reading-col.split .quiz-pane .submit-bar{flex:none}.reading-grid.split .reading-left{flex-direction:column;gap:10px;display:flex}.reading-grid.split .reading-left .rail{max-height:none;position:static}.layout-toggle{border:1px solid #dbe4f0;border-radius:7px;margin-left:auto;display:inline-flex;overflow:hidden}.layout-toggle button{color:#5a6b80;cursor:pointer;background:#fff;border:none;padding:3px 11px;font-size:12px}.layout-toggle button+button{border-left:1px solid #dbe4f0}.layout-toggle button.on{color:#1857b8;background:#eaf1fb;font-weight:600}.q-options label.mine.right{background:#e9f6ee;box-shadow:inset 0 0 0 1px #9fd3b3}.q-options label.mine.wrong{background:#fdecea;box-shadow:inset 0 0 0 1px #f0b4ab}.q-options label.right:not(.mine){box-shadow:inset 0 0 0 1px #9fd3b3}.q-options label.mine:not(.right):not(.wrong){background:#f4f1ea}.q-options label.mine,.q-options label.right{opacity:1!important}.opt-note{white-space:nowrap;border-radius:4px;margin-left:8px;padding:0 6px;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:11px}.opt-note.ok{color:#1d6b40;background:#dcf1e4}.opt-note.bad{color:#a8321f;background:#fbdcd6}.q-verdict{vertical-align:2px;border-radius:4px;margin-left:8px;padding:1px 6px;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:11px;font-weight:600}.q-verdict.correct{color:#1d6b40;background:#dcf1e4}.q-verdict.wrong{color:#a8321f;background:#fbdcd6}.q-verdict.review{color:#8b7000;background:#fdf3d4}.q-verdict.unanswered{color:#8b97a8;background:#eef1f5}.q-blank.correct:disabled{color:#1d6b40;background:#e9f6ee}.q-blank.wrong:disabled{color:#a8321f;background:#fdecea}.q-blank.review:disabled{color:#8b7000;background:#fdf6e0}.q-key{color:#5a6b80;margin-left:8px;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:12px}.q-key b{color:#1d6b40}.q-explain{color:#3d4a5c;background:#f5f8fc;border-left:3px solid #9fc0e8;border-radius:7px;margin:8px 0 4px;padding:8px 11px;font-family:PingFang SC,Helvetica Neue,Arial,sans-serif;font-size:13px;line-height:1.7}.q-explain-tag{color:#1857b8;background:#eaf1fb;border-radius:4px;margin-right:8px;padding:0 6px;font-size:11px;font-weight:600;display:inline-block}.passage .probe{text-underline-offset:2.5px;text-decoration:underline;text-decoration-thickness:1.5px}.wp-held{color:#8a5a10;background:#fff8e8;border:1px solid #f0dcb0;border-radius:7px;margin-top:2px;padding:8px 10px;font-size:12.5px;line-height:1.75}.wp-held b{color:#7a4f0c;font-weight:600}.blank-jump{cursor:pointer;text-underline-offset:2px;padding:0 1px;font-weight:600;text-decoration:underline}.blank-jump:hover{color:#7a4f0c}.q-flash{animation:1.6s ease-out q-flash}@keyframes q-flash{0%,60%{background:#fff3d6}to{background:0 0}}.q-options .taken{opacity:.38;cursor:not-allowed}.q-options .taken input{cursor:not-allowed}.pool-at{color:#8a5a10;background:#fff3d6;border-radius:4px;margin-left:6px;padding:1px 5px;font-size:10.5px}