:root{--transition-speed:.35s;--z-card-tabs:500;--z-fab:900;--z-toc:1000;--z-toc-overlay:2000;--z-teacher-bar:9000;--z-teacher-panel:9999;--z-teacher-overlay:10000;--z-teacher-modal:10001;--z-cs-toast:30000;--z-slide-overlay:15000;--z-slide-panel:16000;--z-slide-controls:16001;--z-slide-nav:20000;--z-exercise-mini:24000;--z-exercise-overlay:25000;--z-explain-overlay:26000;--z-ink-layer:450;--z-ink-toolbar:27000;--z-sim-fs:2147480000;--safe-t:env(safe-area-inset-top,0px);--safe-r:env(safe-area-inset-right,0px);--safe-b:env(safe-area-inset-bottom,0px);--safe-l:env(safe-area-inset-left,0px);--bg-body:#f8fafc;--bg-image:linear-gradient(135deg, #0ea5e90a 0%, transparent 40%, #8b5cf609 100%);--text-main:#1e293b;--text-sub:#475569;--card-width:860px;--card-bg:#ffffffd1;--card-backdrop:blur(20px) saturate(1.8);--card-border:#e2e8f0b3;--card-border-width:1px;--card-shadow:0 1px 2px #00000008, 0 4px 16px #94a3b814, 0 16px 48px #94a3b80f}@media (width>=1024px){:root{--card-width:min(1100px, 92vw)}}@media (width>=1024px) and (width<=1240px){:root{--card-width:min(1100px, calc(100vw - 128px))}}@media (width<=767px){:root{--card-width:100%;--base-font-size:14px}body{padding:10px max(12px,3vw);line-height:1.7}body:has(#page-scale-viewport.page-scale-active){padding:0}body:has(.toc-toggle) header{box-sizing:border-box;padding-left:76px;padding-right:56px}body:has(#stu-fab-group) header{box-sizing:border-box;padding-right:58px}header p{font-size:.8em}h1{padding-bottom:6px;font-size:1.5em}h2{border-left-width:4px;margin-bottom:16px;padding-left:10px;font-size:1.25em}h3{margin-top:1.2em;padding-bottom:6px;font-size:1.1em}}:root{--col-main:#0ea5e9;--col-sub:#8b5cf6;--col-accent:#f43f5e;--col-warning:#f59e0b;--col-highlight:#fef08a;--col-main-text:#0369a1;--col-sub-text:#7c3aed;--col-accent-text:#be123c;--col-warning-text:#b45309;--btn-text-color:#fff;--quiz-bg:#fff;--sim-bg:#e2e8f0;--formula-bg:#fff;--formula-border:#f43f5e;--formula-text:#334155;--base-font-size:18px;--reveal-opacity:0;--reveal-transform:translateY(30px)}.skip-link{background:var(--col-main);color:#fff;z-index:var(--z-teacher-overlay);border-radius:8px;padding:10px 16px;font-weight:700;text-decoration:none;transition:top .2s;position:absolute;top:-100px;left:8px}.skip-link:focus{outline:3px solid var(--col-accent);outline-offset:2px;top:8px}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}body{background-color:var(--bg-body);background-image:var(--bg-image);color:var(--text-main);font-family:"M PLUS Rounded 1c",Noto Sans JP,sans-serif;line-height:1.9;font-size:var(--base-font-size);transition:color var(--transition-speed), background-color var(--transition-speed);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-size:cover;background-attachment:fixed;margin:0;padding:20px 2vw}header{max-width:var(--card-width);text-align:center;width:100%;margin:0 auto 40px}.header-row{justify-content:space-between;align-items:center;gap:20px;display:flex}#header-qr-btn{border:2px solid var(--card-border);cursor:pointer;border-radius:12px;flex-shrink:0;width:60px;height:60px;transition:all .3s;box-shadow:0 2px 8px #0000001a}#header-qr-btn:hover{border-color:var(--col-main);transform:scale(1.05);box-shadow:0 4px 12px #0ea5e94d}header p{color:var(--col-sub-text);letter-spacing:.1em;opacity:.9;text-align:left;margin-bottom:5px;font-family:Poppins,sans-serif;font-size:.9em;font-weight:600}h1{background:linear-gradient(135deg, var(--col-main), var(--col-sub));-webkit-text-fill-color:transparent;border-bottom:3px solid #0000;-o-border-image:linear-gradient(90deg, var(--col-main), var(--col-sub)) 1;border-image:linear-gradient(90deg, var(--col-main), var(--col-sub)) 1;letter-spacing:.02em;-webkit-background-clip:text;background-clip:text;margin-top:5px;padding-bottom:10px;font-size:2.2em;display:inline-block}h2{color:var(--text-main);border-left:5px solid #0000;-o-border-image:linear-gradient(180deg, var(--col-main), var(--col-sub)) 1;border-image:linear-gradient(180deg, var(--col-main), var(--col-sub)) 1;letter-spacing:.01em;margin-top:0;margin-bottom:25px;padding-left:16px;font-size:1.6em}h3{color:var(--col-sub-text);border-bottom:2px dashed #e2e8f099;margin-top:1.5em;padding-bottom:8px;font-size:1.3em}.fab-container{bottom:20px;bottom:calc(20px + env(safe-area-inset-bottom,0px));padding:0 20px;padding-left:calc(20px + env(safe-area-inset-left,0px));padding-right:calc(20px + env(safe-area-inset-right,0px));z-index:var(--z-fab);pointer-events:none;flex-direction:row;justify-content:flex-start;align-items:center;gap:12px;display:flex;position:fixed;left:0;right:0}.fab-btn.fab-top-right,.fab-container #btn-top{margin-left:auto}.fab-btn{pointer-events:auto;background:linear-gradient(135deg, var(--col-main), #38bdf8);color:#fff;cursor:pointer;opacity:0;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:none;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;font-size:1.5rem;transition:transform .25s cubic-bezier(.34,1.56,.64,1),opacity .35s,box-shadow .25s;display:flex;transform:translateY(20px);box-shadow:0 4px 16px #0ea5e94d,0 2px 4px #0000001a}.fab-btn.visible{opacity:1;transform:translateY(0)}.fab-btn:hover{transform:scale(1.1);box-shadow:0 6px 24px #0ea5e966,0 2px 4px #0000001a}.fab-btn:active{transition-duration:.1s;transform:scale(.95)}#btn-reset,.sub-fab{display:none!important}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media print{@page{size:A4;margin:15mm 15mm 20mm;@bottom-right{content:counter(page) " / " counter(pages);font-family:system-ui,-apple-system,sans-serif;font-size:9pt;color:#666}}body{font-size:11pt;color:#000!important;background:#fff!important;padding:0!important}.fab-container,.toc-toggle,.theme-toggle,.interactive-area,.sim-btn,.live-quiz,#session-overlay,#exercise-overlay,#explain-overlay,.teacher-bar,.teacher-panel,.slide-overlay,.student-progress-btn,.annotation-fab,.skip-link,footer,iframe{display:none!important}.card{-moz-column-break-inside:avoid;break-inside:avoid;margin-bottom:12pt;padding:10pt;box-shadow:none!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important;background:#fff!important;border:1px solid #ccc!important}h1,h2,h3{page-break-after:avoid}p,li{orphans:3;widows:3}.formula-box{-moz-column-break-inside:avoid;break-inside:avoid;background:#f9f9f9!important;border:1px solid #333!important}a[href^=http]:after{content:" (" attr(href) ")";color:#666;font-size:9pt}}@media (width<=767px){h1{padding-bottom:6px;font-size:1.7em}h2{border-left-width:4px;margin-bottom:16px;padding-left:10px;font-size:1.3em}h3{margin-top:1.2em;padding-bottom:6px;font-size:1.12em}header p{font-size:.85em}.header-row{flex-wrap:wrap;gap:10px}#header-qr-btn{width:44px;height:44px}}.card{max-width:var(--card-width);box-sizing:border-box;background:var(--card-bg);width:100%;-webkit-backdrop-filter:var(--card-backdrop);border:var(--card-border-width) solid var(--card-border);box-shadow:var(--card-shadow);border-radius:20px;margin:0 auto 40px;padding:40px;transition:width .4s,max-width .4s,background-color .4s,border-color .3s,box-shadow .3s,transform .3s}.card:hover{box-shadow:0 1px 2px #00000008,0 8px 24px #94a3b81f,0 20px 56px #94a3b814}.card-tabs{z-index:var(--z-card-tabs);max-width:var(--card-width);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#f8fafceb;border:none;border-radius:0 0 12px 12px;width:100%;margin:0 auto;padding:0;position:sticky;top:0;box-shadow:0 3px 12px #0f172a14}.card-nav{align-items:center;gap:2px;padding:4px 6px;display:flex}.card-nav__btn{width:44px;height:44px;color:var(--text-main);cursor:pointer;background:0 0;border:0;border-radius:10px;flex:none;justify-content:center;align-items:center;font-size:16px;line-height:1;display:flex}.card-nav__btn:hover:not(:disabled){background:#64748b1f}.card-nav__btn:disabled{opacity:.28;cursor:default}.card-nav__menu--open{background:#0ea5e929}.card-nav__title{min-width:0;height:44px;color:var(--text-main);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:10px;flex:auto;align-items:center;gap:8px;padding:0 6px;display:flex}.card-nav__title:hover{background:#64748b1f}.card-nav__count{background:var(--col-main,#0ea5e9);color:#fff;border-radius:999px;flex:none;padding:2px 8px;font-size:.72em;font-weight:700}.card-nav__label{white-space:nowrap;text-overflow:ellipsis;flex:auto;min-width:0;font-weight:700;overflow:hidden}.card-nav__menu-panel{overscroll-behavior:contain;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#f8fafcfa;border-radius:0 0 12px 12px;max-height:min(72vh,660px);position:absolute;top:100%;left:0;right:0;overflow-y:auto;box-shadow:0 10px 26px #0f172a29}.card-nav__menu-panel .card-tabs__list{-moz-column-gap:4px;grid-template-columns:minmax(0,1fr) auto;column-gap:4px;padding:6px;display:grid;overflow:visible}.card-nav__menu-panel .card-tab{text-align:left;white-space:normal;grid-column:1/-1;width:100%;margin:0 0 2px;display:block}.card-nav__menu-panel .card-tab--has-secs{grid-column:1}.card-tab__more{min-width:44px;color:var(--text-sub,#64748b);font:inherit;white-space:nowrap;cursor:pointer;background:#6366f10f;border:1px solid #6366f138;border-radius:10px;grid-column:2;align-items:center;gap:2px;margin:0 0 2px;padding:0 12px;font-size:.8rem;font-weight:700;display:inline-flex}.card-tab__more:hover{background:#6366f124}.card-tab__more[aria-expanded=true]{color:#4338ca;background:#6366f129}.card-tab__more-chev{transition:transform .15s;display:inline-block}.card-tab__more[aria-expanded=true] .card-tab__more-chev{transform:rotate(180deg)}#demo-bar{z-index:30001;padding:6px 10px;padding-top:calc(6px + env(safe-area-inset-top,0px));box-sizing:border-box;color:#f8fafc;background:#1e293b;align-items:center;gap:8px;font-size:.78rem;font-weight:700;display:flex;position:fixed;top:0;left:0;right:0}.demo-bar__tag{color:#1e293b;letter-spacing:.08em;background:#f59e0b;border-radius:999px;flex:none;padding:2px 8px}.demo-bar__txt{text-overflow:ellipsis;white-space:nowrap;flex:auto;min-width:0;font-weight:400;overflow:hidden}.demo-bar__btn{color:#f8fafc;font:inherit;cursor:pointer;background:0 0;border:1px solid #f8fafc73;border-radius:8px;flex:none;padding:5px 10px;font-size:.78rem;text-decoration:none}.demo-bar__btn:hover{background:#f8fafc29}.card-pager{flex-direction:column;align-items:center;gap:10px;margin:28px auto 0;display:flex}.card-pager__row{justify-content:center;align-items:stretch;gap:12px;width:100%;max-width:560px;display:flex}.card-pager__btn{font:inherit;cursor:pointer;color:var(--text-main);border:0}.card-pager__prev{background:var(--card-bg,#fff);border:1.5px solid var(--card-border,#e2e8f0);width:56px;min-height:56px;color:var(--col-main,#0ea5e9);border-radius:50%;flex:0 0 56px;font-size:18px;transition:transform .15s,box-shadow .2s,border-color .2s;box-shadow:0 2px 8px #0f172a0f}.card-pager__prev:hover{border-color:var(--col-main,#0ea5e9);transform:translate(-2px)}.card-pager__btn--empty{visibility:hidden;pointer-events:none}.card-pager__next{-moz-column-gap:12px;text-align:left;color:#fff;background:linear-gradient(120deg,#0ea5e9 0%,#6366f1 100%);border-radius:999px;flex:auto;grid-template-rows:auto auto;grid-template-columns:1fr auto;align-items:center;column-gap:12px;min-width:0;min-height:56px;padding:10px 16px 10px 22px;transition:transform .15s,box-shadow .2s,filter .2s;display:grid;box-shadow:0 6px 18px #4f46e547}.card-pager__next:hover{filter:brightness(1.05);transform:translateY(-2px);box-shadow:0 10px 24px #4f46e55c}.card-pager__next:active{transform:scale(.985)}.card-pager__dir{letter-spacing:.12em;opacity:.85;grid-area:1/1;font-size:.72rem;font-weight:800}.card-pager__name{text-overflow:ellipsis;white-space:nowrap;grid-area:2/1;font-size:1.02rem;font-weight:800;overflow:hidden}.card-pager__arrow{background:#ffffff38;border-radius:50%;grid-area:1/2/span 2;justify-content:center;align-items:center;width:38px;height:38px;font-size:14px;transition:transform .2s;display:flex}.card-pager__next:hover .card-pager__arrow{transform:translate(3px)}.card-pager__end{color:var(--text-sub,#64748b);align-self:center;font-weight:800}a.card-pager__home{color:#fff;text-decoration:none}a.card-pager__home:visited{color:#fff}.card-pager__pos{width:100%;max-width:320px;color:var(--text-sub,#64748b);align-items:center;gap:10px;font-size:.78rem;font-weight:800;display:flex}.card-pager__bar{background:var(--card-border,#e2e8f0);border-radius:999px;flex:auto;height:5px;overflow:hidden}.card-pager__bar>span{background:linear-gradient(90deg,#0ea5e9,#6366f1);border-radius:999px;height:100%;display:block}body.printing .card-pager,.present-slide .card-pager{display:none!important}.card-tabs__list{-webkit-overflow-scrolling:touch;scrollbar-width:thin;scrollbar-color:var(--card-border) transparent;flex-wrap:nowrap;gap:6px;padding:10px 16px 12px;display:flex;overflow:auto hidden}.card-tabs__list::-webkit-scrollbar{height:6px}.card-tabs__list::-webkit-scrollbar-track{background:0 0}.card-tabs__list::-webkit-scrollbar-thumb{background:var(--card-border);border-radius:3px}.card-tabs__list::-webkit-scrollbar-thumb:hover{background:var(--text-sub)}.card-tab{color:var(--text-sub);border:1px solid var(--card-border);cursor:pointer;white-space:nowrap;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#fff9;border-radius:10px;flex-shrink:0;padding:8px 14px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .25s cubic-bezier(.4,0,.2,1)}.card-tab:hover{color:var(--col-main-text);border-color:var(--col-main);background:#0ea5e90f;transform:translateY(-1px)}.card-tab--active{color:#fff;border-color:var(--col-main);background:linear-gradient(135deg, var(--col-main), #38bdf8);box-shadow:0 2px 8px #0ea5e940}.card-tab:active{transition-duration:.1s;transform:scale(.96)}.card-tab-panel--hidden{display:none!important}.reveal-target{opacity:var(--reveal-opacity);transform:var(--reveal-transform);will-change:opacity, transform;transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}.reveal-target.reveal-show{opacity:1;transform:translateY(0)}strong{font-size:1.2em}.highlight{background:var(--col-highlight);color:inherit;border-radius:4px;padding:0 4px;font-size:1.2em;font-weight:700}.cloze{color:#0000;cursor:pointer;text-align:center;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;background:#0ea5e90f;border:1.5px dashed #64748b59;border-radius:8px;min-width:80px;min-height:44px;padding:6px 14px;font-weight:700;line-height:1.6;transition:all .25s cubic-bezier(.4,0,.2,1);display:inline-block;position:relative}.cloze:active:not(.revealed){background:#0ea5e91f;transition-duration:.1s;transform:scale(.97)}.formula-box>div:has(>.cloze){flex-wrap:nowrap;justify-content:center;align-items:center;gap:.15em;display:flex;overflow-x:auto}.formula-box.compact>div:not(.formula-desc):has(>[data-note=blank]){flex-wrap:nowrap;justify-content:center;align-items:center;gap:.15em;display:flex;overflow-x:auto}.cloze:not(.revealed):not(.editing)>*{visibility:hidden;opacity:0}.cloze:not(.editing):before{content:"TAP";color:var(--text-sub);font-size:.75em;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.cloze.editing:before{display:none;content:none!important}.cloze.editing{cursor:text;padding:0 5px}.cloze.revealed{color:var(--col-accent-text);border:none;border-bottom:2px solid var(--col-accent);background:0 0;border-radius:0;font-size:1.3em;animation:.4s cubic-bezier(.16,1,.3,1) clozeReveal}.cloze.revealed:before{content:""}@keyframes clozeReveal{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.cloze-input{border:none;border-bottom:1px solid var(--text-sub);color:var(--text-main);text-align:center;background:0 0;width:120px;padding:2px 5px;font-family:inherit;font-size:1rem;transition:all .2s}.cloze-input:focus{border-bottom-color:var(--col-accent);background:#0ea5e90d;outline:none}.cloze-input.error{border-bottom-color:var(--col-warning);background:#ef44441a;animation:.3s ease-in-out shake}.cloze-input::placeholder{color:var(--text-sub);opacity:.5;font-size:.8em}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.term-box{border-left:4px solid #0000;-o-border-image:linear-gradient(180deg, var(--col-main), #0ea5e94d) 1;border-image:linear-gradient(180deg, var(--col-main), #0ea5e94d) 1;background:#0ea5e90f;border-radius:12px;align-items:flex-start;margin:20px 0;padding:15px 20px;transition:background .25s;display:flex}.term-box:hover{background:#0ea5e917}.term-icon{flex-shrink:0;margin-right:15px;font-size:1.5em}details.term-box{border-radius:10px;margin:20px 0;display:block;border:1px solid var(--card-border)!important;background:#7d7d7d0d!important}details.term-box summary{color:var(--col-main-text);align-items:center;gap:10px;padding:15px 20px;display:flex}details.term-box summary:hover{background:#7d7d7d0d}details.term-box summary:before{content:"▶";flex-shrink:0;margin-right:12px;font-size:.8em;transition:transform .2s}details.term-box[open] summary:before{transform:rotate(90deg)}details.term-box summary::-webkit-details-marker{display:none}details.term-box summary::marker{display:none}details .term-box-content{border-top:1px solid var(--card-border);padding:20px}details .term-box-content p,details .term-box-content ul{margin:12px 0 0}details .term-box-content p:first-child,details .term-box-content ul:first-child{margin-top:0}table{border-collapse:separate;border-spacing:0;background:#fff;border-radius:12px;width:100%;max-width:100%;margin:1.4em 0;font-size:.95rem;overflow:hidden;box-shadow:0 1px 4px #0000000f,0 4px 16px #94a3b814}thead th{color:#fff;text-align:center;letter-spacing:.03em;white-space:nowrap;background:linear-gradient(135deg,#0ea5e9,#6366f1);border:none;padding:13px 16px;font-size:.9rem;font-weight:700}tbody td{color:var(--text-main);text-align:center;border:none;border-bottom:1px solid #f1f5f9;padding:11px 16px}tbody tr:nth-child(2n){background:#f8fafc}tbody tr:nth-child(odd){background:#fff}tbody tr:last-child td{border-bottom:none}tbody tr:hover{background:#e0f2fe;transition:background .15s}@media (width<=767px){table{-webkit-overflow-scrolling:touch;background:linear-gradient(90deg,#fff 30%,#fff0) 0/28px 100% no-repeat local,linear-gradient(270deg,#fff 30%,#fff0) 100%/28px 100% no-repeat local,radial-gradient(farthest-side at 0,#0f172a2e,#0000) 0/14px 100% no-repeat,radial-gradient(farthest-side at 100%,#0f172a2e,#0000) 100%/14px 100% no-repeat;font-size:.85rem;display:block;overflow-x:auto}thead th,tbody td{white-space:nowrap;padding:9px 12px}}.responsive-img{border-radius:12px;max-width:100%;height:auto;margin:30px auto;display:block;box-shadow:0 8px 20px #0003}:focus-visible{outline:2px solid var(--col-main,#3b82f6);outline-offset:2px;border-radius:3px}.sim-btn:focus-visible,.card-tab:focus-visible{outline:2px solid var(--col-main,#3b82f6);outline-offset:3px}.sim-btn,.sim-control-panel button{cursor:pointer;min-height:44px;font-family:inherit;font-size:.9rem;font-weight:700;transition:all .25s cubic-bezier(.4,0,.2,1);box-shadow:0 1px 3px #0000000f;color:var(--text-main)!important;background:#fffffff2!important;border:1px solid #64748b4d!important;border-radius:20px!important;padding:6px 16px!important}.sim-btn:hover,.sim-control-panel button:hover,.sim-btn.active{transform:scale(1.05)translateY(-1px);background:linear-gradient(135deg, var(--col-main), #38bdf8)!important;color:#fff!important;border-color:var(--col-main)!important;box-shadow:0 4px 12px #0ea5e94d!important}.sim-btn:active,.sim-control-panel button:active{transition-duration:.1s;transform:scale(.97)}.interactive-area{background:var(--sim-bg,#e2e8f0);border:3px solid var(--card-border);touch-action:none;-webkit-user-select:none;user-select:none;border-radius:20px;width:100%;max-width:640px;margin:20px auto;transition:border-color .3s,box-shadow .3s;position:relative;overflow:hidden;box-shadow:inset 0 2px 8px #94a3b80f}@media (width>=760px){:is(.print-sim-wrapper:has(>.interactive-area--right),.print-sim-wrapper:has(>.interactive-area--left)){width:44%;max-width:340px;margin-top:6px;margin-bottom:12px}.print-sim-wrapper:has(>.interactive-area--right){float:right;margin-left:22px;margin-right:0}.print-sim-wrapper:has(>.interactive-area--left){float:left;margin-left:0;margin-right:22px}.print-sim-wrapper>.interactive-area--right,.print-sim-wrapper>.interactive-area--left{float:none;box-sizing:border-box;width:100%;max-width:none;margin:4px 0 6px}.interactive-area--right,.interactive-area--left{width:44%;max-width:340px;margin-top:6px;margin-bottom:12px}.interactive-area--right{float:right;margin-left:22px;margin-right:0}.interactive-area--left{float:left;margin-left:0;margin-right:22px}:is(.print-sim-wrapper:has(>.interactive-area--right) .ann-sim-label,.print-sim-wrapper:has(>.interactive-area--left) .ann-sim-label){text-align:center;font-size:.74rem;line-height:1.4}:is(.print-sim-wrapper:has(>.interactive-area--right) .sim-gallery-link-wrap,.print-sim-wrapper:has(>.interactive-area--left) .sim-gallery-link-wrap){text-align:center;font-size:.76rem}:is(.print-sim-wrapper:has(>.interactive-area--right) .sim-gallery-link-wrap a,.print-sim-wrapper:has(>.interactive-area--left) .sim-gallery-link-wrap a){padding:5px 10px}.card h2,.card h3,.card .formula-box,.card details,.card table,.card .print-sim-wrapper:not(.sim-wrap--right):not(.sim-wrap--left),.card .interactive-area:not(.interactive-area--right):not(.interactive-area--left){clear:both}.print-sim-wrapper.sim-wrap--right,.print-sim-wrapper.sim-wrap--left{width:44%;max-width:340px;margin-top:6px;margin-bottom:12px}.print-sim-wrapper.sim-wrap--right{float:right;margin-left:22px;margin-right:0}.print-sim-wrapper.sim-wrap--left{float:left;margin-left:0;margin-right:22px}.print-sim-wrapper.sim-wrap--right .ann-sim-label,.print-sim-wrapper.sim-wrap--left .ann-sim-label{text-align:center;font-size:.74rem;line-height:1.4}.print-sim-wrapper.sim-wrap--right .sim-gallery-link-wrap,.print-sim-wrapper.sim-wrap--left .sim-gallery-link-wrap{text-align:center;font-size:.76rem}}.card .live-quiz{display:flow-root}.interactive-area:empty{justify-content:center;align-items:center;min-height:400px;display:flex}.interactive-area:empty:after{content:"";border:3px solid #0ea5e933;border-top-color:var(--col-main);border-radius:50%;width:32px;height:32px;animation:.7s linear infinite sim-spin}@keyframes sim-spin{to{transform:rotate(360deg)}}.interactive-area:hover{border-color:#0ea5e94d}.sim-gallery-link-wrap{box-sizing:border-box;justify-content:flex-end;width:100%;max-width:640px;margin:-12px auto 18px;padding:0 4px;display:flex}.sim-gallery-link{color:var(--col-main-text);border:1.5px solid var(--col-main);background:var(--card-bg,#fff);white-space:nowrap;border-radius:999px;align-items:center;gap:4px;padding:4px 12px;font-size:.82em;font-weight:700;text-decoration:none;transition:background .2s,color .2s,transform .15s;display:inline-flex}.sim-gallery-link:hover,.sim-gallery-link:focus-visible{background:var(--col-main);color:#fff;outline:none;transform:translateY(-1px)}.interactive-area canvas{touch-action:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;outline:none;margin:0 auto;display:block;width:100%!important;max-width:100%!important;height:auto!important}.drive-embed{text-align:center;border-radius:12px;width:100%;overflow:hidden}.drive-embed img{border-radius:12px;width:100%;height:auto;display:block}.drive-embed iframe{aspect-ratio:16/9;border:none;border-radius:12px;width:100%;display:block}details{background:#f8fafc99;border:1px solid #e2e8f099;border-radius:12px;margin:14px 0;padding:10px 14px 12px;transition:border-color .25s,box-shadow .25s}details:hover{border-color:#0ea5e933}details[open]{box-shadow:0 2px 12px #94a3b814}summary{cursor:pointer;color:var(--col-main-text);-webkit-user-select:none;user-select:none;border-bottom:1px solid #e2e8f080;margin:0 0 6px;padding:0 0 6px;font-weight:700;list-style:none;display:block}summary:hover{background:0 0}summary:before{content:"▶";color:var(--col-main-text);margin-right:6px;font-size:.7em;transition:transform .2s;display:inline-block}details[open]>summary:before{transform:rotate(90deg)}details[data-lock-open=true]>summary:before{content:none;display:none}summary::-webkit-details-marker{display:none}summary::marker{display:none}.details-content{border-top:none;padding:0;animation:.3s cubic-bezier(.16,1,.3,1) detailsOpen}@keyframes detailsOpen{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.box-alert{max-width:var(--card-width);box-sizing:border-box;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#f59e0b0f;border:2px solid #f59e0b80;border-radius:16px;width:100%;margin:40px auto;padding:25px;position:relative}.box-alert-label{background:linear-gradient(135deg, var(--col-warning), #fb923c);color:#fff;border-radius:12px;padding:2px 14px;font-size:1rem;font-weight:700;position:absolute;top:-14px;left:20px;box-shadow:0 2px 8px #f59e0b4d}.quiz-question-block{border-bottom:1px dashed var(--card-border);margin-bottom:30px;padding-bottom:20px}.quiz-question-block:last-of-type{border-bottom:none}.quiz-question-text{margin-bottom:15px;font-weight:700}.quiz-options-group{flex-direction:column;gap:10px;display:flex}.quiz-option-label{cursor:pointer;background:#ffffff80;border:1.5px solid #e2e8f0b3;border-radius:10px;align-items:center;padding:12px 15px;transition:all .25s cubic-bezier(.4,0,.2,1);display:flex}.quiz-option-label:hover{background:linear-gradient(135deg, var(--col-main), #38bdf8);color:#fff;border-color:var(--col-main);transform:translate(4px);box-shadow:0 2px 8px #0ea5e933}.quiz-option-label:active{transition-duration:.1s;transform:scale(.98)}.quiz-option-label input[type=radio]{accent-color:var(--col-main);margin-right:12px;transform:scale(1.2)}.quiz-option-label.correct-answer{color:var(--text-main);font-weight:700;background-color:#22c55e33!important;border-color:#22c55e!important}.quiz-option-label.wrong-answer{background-color:#ef444433!important;border-color:#ef4444!important}.quiz-explanation-area{border-left:4px solid var(--text-sub);background:#00000008;border-radius:8px;margin-top:15px;padding:15px;animation:.5s fadeIn;display:none}.quiz-explanation-area.show{display:block}.quiz-submit-btn{background:var(--col-main);color:#fff;cursor:pointer;border:none;border-radius:30px;padding:12px 40px;font-size:1.1rem;font-weight:700;transition:transform .2s;box-shadow:0 4px 10px #0003}.quiz-submit-btn:hover{transform:scale(1.05)}section.card .quiz-question-block{border-bottom:1px dashed var(--card-border);margin-bottom:25px;padding-bottom:15px}section.card .quiz-question-block:last-of-type{border-bottom:none;margin-bottom:0;padding-bottom:0}section.card h3{color:var(--col-main-text);border-bottom:2px solid var(--col-sub);margin-bottom:25px;padding-bottom:10px}mjx-container[display=true]{max-width:100%;padding-bottom:2px;overflow:auto hidden}.formula-box{text-align:center;color:#1a1a1a;background:0 0;border:none;border-radius:0;margin:1.2em 0;padding:.5em 0;font-size:1.35rem;position:relative}.formula-desc{text-align:left;color:var(--text-main);margin-top:20px;font-size:1rem;line-height:1.8;display:inline-block}.formula-box.text-mode>div:first-child{font-size:1.1rem;color:var(--text-main)!important}.formula-box.compact{text-align:left;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px 0;padding:.6em 10px;display:flex}.formula-box.compact>div:not(.ann-formula-hit):not(.formula-desc){text-align:center;box-sizing:border-box;min-width:0;color:inherit;flex:0 0 50%;overflow:auto hidden}.formula-box.compact .formula-desc{box-sizing:border-box;border-left:none;flex:0 0 50%;min-width:0;margin-top:0;padding-left:1.5em;font-size:.95rem;display:block}.formula-box.compact:not(.formula-important)>div:first-child,.formula-box.compact:not(.formula-important) .formula-desc{color:var(--text-main)}.formula-box.compact:not(.formula-important){border:1.5px solid var(--col-main);color:var(--text-main);background:#0ea5e90d;border-radius:12px;margin-top:2em;padding:.8em 16px}.formula-box.compact:not(.formula-important):before{content:"公式";background:linear-gradient(135deg, var(--col-main), #38bdf8);color:#fff;border-radius:12px;padding:2px 14px;font-size:.85rem;font-weight:700;display:block;position:absolute;top:-14px;left:20px;box-shadow:0 2px 8px #0ea5e94d}.formula-box.formula-important{background:var(--formula-bg);border:2px solid var(--formula-border);color:var(--formula-text);border-radius:16px;margin:50px 0;padding:40px 20px;font-size:2rem}.formula-box.formula-important.compact{padding:20px 10px}.formula-box.formula-important>div:not(.ann-formula-hit):not(.formula-desc),.formula-box.formula-important.compact>div:not(.ann-formula-hit):not(.formula-desc){color:var(--formula-text)}.formula-box.formula-important>div:not(.ann-formula-hit):not(.formula-desc):not(.cloze),.formula-box.formula-important>div:not(.ann-formula-hit):not(.formula-desc).cloze.revealed{color:var(--col-warning-text)}.formula-box .cloze.revealed{border-bottom:none}.formula-box:before{content:none;display:none}.formula-box.formula-important:before{content:"重要公式";background:linear-gradient(135deg, var(--col-accent), #fb7185);color:#fff;letter-spacing:.05em;border-radius:20px;padding:2px 20px;font-size:.9rem;font-weight:700;display:block;position:absolute;top:-14px;left:30px;box-shadow:0 4px 12px #f43f5e4d}.formula-title-important{background:var(--col-accent);color:#fff;letter-spacing:.05em;border-radius:20px;padding:2px 20px;font-size:.9rem;font-weight:700;position:absolute;top:-14px;left:30px;box-shadow:0 4px 10px #0000004d}.formula-box.highlight-formula:before{display:none}.formula-box.highlight-formula .formula-title-important:before{content:""}.box-profile{background:#7d7d7d0d;border-left:4px solid #fb8a3f;border-radius:0 12px 12px 0;align-items:center;margin-top:30px;margin-bottom:20px;padding:20px;display:flex}.profile-img{-o-object-fit:cover;object-fit:cover;border:3px solid var(--card-bg);background:#ccc;border-radius:12px;flex-shrink:0;width:150px;height:180px;margin-right:25px;box-shadow:0 4px 10px #0000001a}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.toc-toggle{top:20px;top:calc(20px + env(safe-area-inset-top,0px));left:20px;left:calc(20px + env(safe-area-inset-left,0px));z-index:var(--z-toc);color:var(--col-main-text);cursor:pointer;-webkit-backdrop-filter:blur(16px)saturate(1.8);-webkit-user-select:none;user-select:none;background:#fffc;border:1.5px solid #0ea5e94d;border-radius:14px;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.5rem;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;position:fixed;box-shadow:0 2px 8px #00000014,0 8px 24px #94a3b81a}.toc-toggle:hover{border-color:var(--col-main);transform:scale(1.08);box-shadow:0 4px 16px #0ea5e933,0 8px 24px #94a3b81f}.toc-toggle:active{transition-duration:.1s;transform:scale(.95)}.toc-overlay{width:100%;height:100%;z-index:var(--z-toc-overlay);opacity:0;pointer-events:none;background:#00000080;justify-content:flex-start;transition:opacity .3s;display:flex;position:fixed;top:0;left:0}.toc-overlay.active{opacity:1;pointer-events:auto}.toc-content{background:var(--card-bg);-webkit-backdrop-filter:blur(15px);border-right:2px solid var(--col-main);box-sizing:border-box;width:320px;max-width:80%;height:100%;padding:20px 30px;transition:transform .3s cubic-bezier(.25,1,.5,1);overflow-y:auto;transform:translate(-100%)}.toc-overlay.active .toc-content{transform:translate(0)}.toc-header{border-bottom:2px dashed var(--col-sub);justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:15px;display:flex}.toc-header h3{color:var(--col-main-text);border:none;margin:0;font-size:1.5rem}.toc-close{border:2px solid var(--text-sub);cursor:pointer;width:32px;height:32px;color:var(--text-sub);background:0 0;border-radius:50%;justify-content:center;align-items:center;font-size:1.5rem;line-height:1;transition:all .2s;display:flex}.toc-close:hover{color:var(--col-accent-text);border-color:var(--col-accent);transform:rotate(90deg)}#toc-list{margin:0;padding:0;list-style:none}#toc-list li{margin-bottom:15px}#toc-list .toc-sublist{border-left:2px solid var(--card-border);margin:8px 0 0;padding:0 0 0 12px;list-style:none}#toc-list .toc-sublist li{margin-bottom:8px}#toc-list .toc-sublist a{padding:6px 12px;font-size:.9rem;font-weight:400}#toc-list a{color:var(--text-main);border:1px solid #0000;border-radius:10px;padding:10px 15px;font-size:1rem;font-weight:700;text-decoration:none;transition:background .2s,color .2s,transform .2s;display:block}#toc-list a:hover{background:var(--col-main);color:#fff;border-color:var(--col-main);transform:translate(5px)}.toc-footer{border-top:2px dashed var(--card-border);text-align:center;margin-top:30px;padding-top:20px}.toc-home-btn{background:var(--bg-body);width:100%;color:var(--text-main);border:1px solid var(--card-border);box-sizing:border-box;border-radius:8px;padding:12px 0;font-weight:700;text-decoration:none;transition:all .2s;display:inline-block}.toc-home-btn:hover{background:var(--col-sub);color:#fff;border-color:var(--col-sub)}.ad-slot:empty{display:none!important}.ad-slot:not(:empty){min-height:90px;margin:1rem 0}[data-site-mode=school] .ad-slot,[data-site-mode=school] #monetization{display:none!important}.site-footer{border-top:2px solid #0000;-o-border-image:linear-gradient(90deg, transparent, var(--card-border,#e2e8f0), transparent) 1;border-image:linear-gradient(90deg, transparent, var(--card-border,#e2e8f0), transparent) 1;text-align:center;color:var(--text-sub,#64748b);margin-top:3rem;padding:2rem 1rem;font-size:.9rem}.site-footer .footer-nav{flex-wrap:wrap;justify-content:center;gap:1rem 2rem;margin-bottom:.75rem;display:flex}.site-footer .footer-nav a{color:var(--text-sub,#64748b);font-weight:600;text-decoration:none;transition:color .2s}.site-footer .footer-nav a:hover{color:var(--col-main,#0ea5e9)}.site-footer .footer-copy{opacity:.7;letter-spacing:.02em;margin:0;font-size:.82rem}@media (pointer:coarse){.card:hover{box-shadow:var(--card-shadow)}.sim-btn:hover,.sim-control-panel button:hover{color:var(--text-main)!important;background:#fffffff2!important;border-color:#64748b4d!important;transform:none!important;box-shadow:0 1px 3px #0000000f!important}.sim-btn.active{background:linear-gradient(135deg, var(--col-main), #38bdf8)!important;color:#fff!important;border-color:var(--col-main)!important}.card-tab,.sim-btn,.fab-btn,.toc-toggle,.quiz-option-label,.cloze{-webkit-tap-highlight-color:transparent}}@media (hover:none){.card-tab:hover{transform:none}details:hover{border-color:#e2e8f099}.interactive-area:hover{border-color:var(--card-border)}}.print-only,.print-only-svg,.print-only-img{display:none}@media (width<=767px){.card{border-radius:14px;margin-bottom:24px;padding:20px 14px}.card-tabs__list{gap:4px;padding:8px 12px 10px}.card-tab{border-radius:8px;min-height:44px;padding:10px 14px;font-size:.78rem}.interactive-area{border-width:2px;border-radius:14px;width:calc(100% + 28px);max-width:none;margin:12px -14px}.interactive-area canvas{margin:0 auto;display:block;width:100%!important;max-width:100%!important;height:auto!important}.interactive-area>div:not([style*=position\:absolute]):not([style*="position: absolute"]){margin-left:auto;margin-right:auto}strong{font-size:1.05em}.highlight{padding:0 2px;font-size:1.05em}.cloze{min-width:60px;min-height:40px;padding:4px 10px}.cloze.revealed{font-size:1.1em}.cloze:before{font-size:.7em}.term-box{border-radius:10px;margin:12px 0;padding:10px 14px}.term-icon{margin-right:10px;font-size:1.2em}details.term-box summary{padding:10px 14px}.details-content{padding:14px}.sim-btn,.sim-control-panel button{min-height:44px;padding:10px 14px!important;font-size:.78rem!important}.interactive-area input[type=range],.sim-control-panel input[type=range]{height:32px}.sim-control-panel label,.sim-control-panel .mode-row,.sim-control-panel .check-row{font-size:.85rem}.box-alert{margin:24px auto;padding:16px}.box-alert-label{font-size:.9rem}.formula-box,.formula-inline{font-size:.95em}section.card h3{font-size:1.05em}}@media print{@page{margin:15mm 18mm 20mm;size:A4;@bottom-right{content:counter(page) " / " counter(pages);font-family:system-ui,-apple-system,sans-serif;font-size:9pt;color:#666}}*,:before,:after{color:inherit;-webkit-print-color-adjust:exact;print-color-adjust:exact;background:0 0;box-shadow:none!important;text-shadow:none!important;box-sizing:border-box!important;opacity:1!important;transform:none!important}body{widows:3;orphans:3;width:100%;margin:0;padding:0;font-size:10.5pt;line-height:1.5;color:var(--text-main)!important;background:#fff!important}.cloze,.cloze.revealed{vertical-align:-.3em;margin:0 2px;position:relative;color:#0000!important;min-width:5em!important;height:1.6em!important;line-height:1.6em!important;font-size:inherit!important;box-sizing:content-box!important;background:0 0!important;border:none!important;border-bottom:1.5pt solid #333!important;border-radius:0!important;padding:0 6px!important;display:inline-block!important}.cloze[data-length=short],.cloze[data-length=short].revealed{min-width:3em!important}.cloze[data-length=long],.cloze[data-length=long].revealed{min-width:8em!important}.cloze>*,.cloze.revealed>*{display:none!important}.formula-box.compact,.formula-box.compact.formula-important{flex-wrap:wrap!important;font-size:11pt!important}.formula-box.formula-important,.formula-box.formula-important.compact{font-size:12pt!important}.formula-box.formula-important .formula-desc,.formula-box.formula-important.compact .formula-desc,.formula-box.compact .formula-desc{font-size:10pt!important}.formula-box.compact>div:not(.ann-formula-hit):not(.formula-desc),.formula-box.compact.formula-important>div:not(.ann-formula-hit):not(.formula-desc){text-align:center!important;flex:0 0 100%!important;width:100%!important}.formula-box.compact .formula-desc{text-align:left!important;flex:none!important;width:auto!important;margin:.4em auto 0!important;padding-left:0!important;font-size:.95em!important}.ann-formula-hit{display:none!important}.formula-box>div>.cloze,.formula-box.formula-important>div>.cloze,.formula-box .formula-desc>div>.cloze{vertical-align:middle;min-width:10em!important;height:1.8em!important;line-height:1.8em!important}.skip-link,.toc-toggle,.toc-overlay,.toc-footer,.cloze:before,.print-hide,.interactive-area,.fab-container,.fab-btn,.card-survey-wrapper,.teacher-survey-stats,.card-understanding-buttons,.card-tabs,.ad-slot,[id^=ad-slot-],.student-progress-btn,.request-fab-btn,.session-overlay,.ann-panel,.ann-panel-toggle,.ann-popover,.ann-popover-backdrop,.ann-cloze-btn,.ann-highlight-btn,.ann-marker,.ann-hint,#header-qr-btn,#qr-overlay,.teacher-review-fab,.teacher-request-fab,.quiz-battle-fab,#fb-conn-indicator,.cs-offline-banner,.ss-toast,.sim-gallery-link-wrap,.sim-gallery-link,#app-toast,[role=alert],.save-toast{display:none!important}.card table,table{margin-left:auto!important;margin-right:auto!important}.card{max-width:190mm;margin-left:auto!important;margin-right:auto!important}@media (orientation:landscape){@page{size:A4 landscape}.card{max-width:250mm}.print-sim-wrapper .print-only-img.has-preview,.print-sim-wrapper .print-sim-placeholder{max-width:420px!important}}header{page-break-after:avoid!important;-moz-column-break-after:avoid!important;break-after:avoid!important;margin-bottom:12px!important}header a{color:inherit!important;text-decoration:none!important}.live-quiz,.live-quiz--intro{display:none!important}.card-tab-panel--hidden{display:block!important}.print-sim-wrapper{visibility:visible!important;page-break-inside:avoid!important;-moz-column-break-inside:avoid!important;break-inside:avoid!important;min-height:180px!important;margin:12px 0 20px!important;display:block!important}.print-sim-wrapper .print-only-img.has-preview{border:1px solid #ccc!important;width:85%!important;max-width:480px!important;height:auto!important;margin:0 auto!important;display:block!important}.print-sim-wrapper .print-only-img:not(.has-preview){display:none!important}.print-sim-wrapper .print-sim-placeholder{text-align:center;padding:80px 16px;font-size:.95rem;visibility:visible!important;color:#333!important;background:#f5f5f5!important;border:1px dashed #999!important;width:85%!important;max-width:480px!important;min-height:200px!important;margin:0 auto!important;display:block!important}.print-sim-wrapper:has(.print-only-img.has-preview) .print-sim-placeholder{display:none!important}button{display:none!important}.quiz-options button{text-align:left;width:100%;margin:5px 0;color:var(--text-main)!important;background:0 0!important;border:none!important;padding:5px 0!important;font-family:inherit!important;font-size:10.5pt!important;line-height:1.5!important;display:block!important}.quiz-panel,.formula-box.formula-important,.box-profile,.term-box{border:1px solid var(--col-main)!important;page-break-inside:avoid!important;-moz-column-break-inside:avoid!important;break-inside:avoid!important;background:#fff!important;width:96%!important;max-width:96%!important;margin:50px auto 30px!important;padding:15px!important}.term-box .term-box-content{display:block!important}.card{border:1px solid var(--col-main)!important;page-break-inside:auto!important;-moz-column-break-inside:auto!important;break-inside:auto!important;background:#fff!important;width:96%!important;max-width:96%!important;margin:30px auto!important;padding:15px!important}.card+.card{-moz-column-break-before:page!important;break-before:page!important;page-break-before:always!important;margin-top:0!important}.print-break-before{-moz-column-break-before:page!important;break-before:page!important;page-break-before:always!important}.card>h2,.card>p,.card>div,.card>ul,.card>ol,.card>details{page-break-inside:avoid;-moz-column-break-inside:avoid;break-inside:avoid}.box-alert{-moz-column-break-inside:avoid!important;break-inside:avoid!important;page-break-inside:avoid!important;background:0 0!important;border:none!important;width:96%!important;margin-top:20px!important;margin-bottom:30px!important;padding:40px 25px 25px!important;position:relative!important}.box-alert:before{content:""!important;border:2px solid var(--col-warning)!important;z-index:-1!important;background:#f59e0b1a!important;border-radius:16px!important;position:absolute!important;inset:15px 0 0!important}.box-alert-label{background:var(--col-warning)!important;color:#fff!important;z-index:5!important;border:none!important;border-radius:12px!important;width:auto!important;margin:0!important;padding:0 10px!important;font-size:1rem!important;font-weight:700!important;display:inline-block!important;position:absolute!important;top:0!important;left:20px!important;transform:none!important}.formula-box{color:#1a1a1a!important;background:0 0!important;border:none!important;margin:1.2em auto!important;padding:.5em 0!important;position:relative!important}.formula-box.formula-important,.formula-box.formula-important.compact{page-break-inside:avoid!important;-moz-column-break-inside:avoid!important;break-inside:avoid!important;background:0 0!important;border:none!important;margin:30px auto!important;padding-top:35px!important;overflow:visible!important}.formula-box.formula-important:before{content:"重要公式"!important;z-index:10!important;background:var(--col-accent)!important;color:#fff!important;box-shadow:none!important;border:none!important;border-radius:20px!important;padding:0 10px!important;font-size:.9rem!important;font-weight:700!important;display:block!important;position:absolute!important;top:0!important;left:20px!important}.formula-box.formula-important:after{content:""!important;border:2px solid var(--formula-border)!important;z-index:1!important;pointer-events:none!important;border-radius:16px!important;display:block!important;position:absolute!important;inset:12px 0 0!important}.formula-box>*,.formula-box.compact>*,.formula-box.formula-important>*,.formula-box.formula-important.compact>*{z-index:5!important;position:relative!important}h1{border-bottom:2px solid var(--col-main)!important;color:var(--col-main-text)!important;margin-bottom:10px!important}h2{border-left:6px solid var(--col-main)!important;color:var(--text-main)!important;margin-top:20px!important;padding-left:10px!important}.term-box{border-left:6px solid var(--col-main)!important;background:#0ea5e90d!important}.highlight{background:var(--col-highlight)!important;color:inherit!important;border:none!important;font-weight:700!important;text-decoration:none!important}.responsive-img{display:block;width:70%!important;max-width:70%!important;box-shadow:none!important;margin:10px auto!important}.profile-img{border:2px solid var(--col-main)!important;width:100px!important;height:120px!important;margin-right:15px!important}.quiz-answer{display:none!important}.print-only{display:block!important}.print-only-svg,.print-only-img{width:70%;margin:10px auto;display:block;border:none!important}details,details>*{height:auto!important;display:block!important;overflow:visible!important}summary:before{content:" ▶ "!important;color:var(--col-main-text)!important;margin-right:10px!important}summary{font-weight:700;color:var(--col-main-text)!important;margin:0!important;padding:0!important;list-style:none!important}.details-content{border:none!important;margin-top:0!important;padding-top:5px!important}.formula-box>div:first-child{visibility:hidden!important}.formula-box.compact{align-items:center!important;padding-bottom:10px!important;padding-left:15px!important;padding-right:15px!important;display:flex!important}.formula-box.compact>div:first-child{visibility:visible!important;opacity:0!important;display:block!important}.formula-box>div:has(.cloze){visibility:visible!important;opacity:1!important}.formula-box.compact>div:has(.cloze){visibility:visible!important;opacity:1!important}.formula-box.compact .formula-desc{border-left:none!important;margin-top:0!important;display:block!important}}.live-quiz{max-width:var(--card-width);box-sizing:border-box;background:0 0;border:none;border-radius:16px;width:100%;margin:1.2em auto;overflow:hidden}.card>.live-quiz{background:var(--bg-body,#f8fafc);border-radius:12px;max-width:none;margin:2em 0 0}.live-quiz--intro{background:0 0;border-radius:0;margin:0}.card>.live-quiz--intro{background:0 0;border-radius:0;margin:.6em 0 .2em}.live-quiz--intro .lq-header{color:var(--col-sub,#8b5cf6);border-top:none;padding:0 0 8px;font-size:.78rem}.live-quiz--intro .lq-wrapper,.card>.live-quiz--intro .lq-wrapper{padding:0}.live-quiz--intro .lq-stem-display{color:var(--text-sub,#64748b);font-size:.95em;font-weight:500}.live-quiz--intro .lq-choices{gap:5px}.live-quiz--intro .lq-choice-btn{background:var(--bg-body,#f1f5f9);border-color:#0000;padding:8px 12px;font-size:.88rem}.live-quiz--intro .lq-choice-btn:hover:not(:disabled){border-color:var(--col-sub,#8b5cf6);background:#8b5cf60f;box-shadow:0 1px 6px #8b5cf61a}.live-quiz--intro .lq-choice-btn.lq-selected{border-color:var(--col-sub,#8b5cf6);background:#8b5cf614}.live-quiz--intro .lq-choice-btn.lq-selected .lq-choice-label{background:var(--col-sub,#8b5cf6)}.live-quiz--intro .lq-choice-label{color:var(--text-sub,#94a3b8);background:0 0;border-radius:6px;width:22px;height:22px;font-size:.75rem}[data-theme=dark] .live-quiz--intro .lq-choice-btn{background:#1e293b66;border-color:#0000}[data-theme=dark] .live-quiz--intro .lq-choice-btn:hover:not(:disabled){background:#8b5cf61a}@media (width<=767px){.live-quiz--intro .lq-choice-btn{padding:7px 10px;font-size:.85rem}.live-quiz--intro .lq-choice-label{width:20px;height:20px;font-size:.72rem}}.card>.live-quiz--predict{background:#fffbeb;border:1.5px solid #fcd34d;margin:1.2em 0}.live-quiz--predict .lq-header.lq-toggle{color:#b45309}.live-quiz--predict .lq-stem-display{font-weight:700}[data-theme=dark] .card>.live-quiz--predict{background:#78350f2e;border-color:#fcd34d73}[data-theme=dark] .live-quiz--predict .lq-header.lq-toggle{color:#fcd34d}.lq-wrapper{padding:24px 28px 28px}.card>.live-quiz .lq-wrapper{padding:0 20px 20px}.lq-header{color:var(--col-main,#0ea5e9);letter-spacing:.06em;border-top:none;align-items:center;gap:8px;padding:14px 20px;font-size:.8rem;font-weight:700;display:flex}.card>.live-quiz .lq-header{border-top:none}button.lq-header,.lq-header.lq-toggle{cursor:pointer;text-align:left;width:100%;color:var(--col-main,#0ea5e9);background:0 0;border:none;font-family:inherit;transition:background .15s}button.lq-header:hover,.lq-header.lq-toggle:hover{background:#0ea5e90f}button.lq-header:focus-visible,.lq-header.lq-toggle:focus-visible{outline:2px solid var(--col-main,#0ea5e9);outline-offset:-2px}.lq-icon{font-size:1rem}.lq-label{flex:1}.lq-hint{color:var(--text-sub,#64748b);letter-spacing:.02em;opacity:.85;margin-left:auto;font-size:.72rem;font-weight:600}.lq-caret{color:var(--col-main,#0ea5e9);font-size:.7rem;transition:transform .2s}.lq-wrapper.lq-collapsed .lq-caret{transform:rotate(-90deg)}.lq-body{display:block}.lq-wrapper.lq-collapsed .lq-body{display:none}.lq-wrapper.lq-collapsed,.card>.live-quiz .lq-wrapper.lq-collapsed{padding-bottom:0}.lq-stem-display{color:var(--text-main,#1e293b);margin-bottom:16px;font-size:1em;font-weight:600;line-height:1.7}.lq-choices{flex-direction:column;gap:6px;display:flex}.lq-choice-btn{border:1.5px solid var(--card-border,#e2e8f0);background:var(--card-bg,#fff);cursor:pointer;text-align:left;width:100%;color:var(--text-main,#1e293b);border-radius:10px;align-items:center;gap:10px;min-height:44px;padding:10px 14px;font-family:inherit;font-size:.92rem;line-height:1.5;transition:border-color .2s,background .2s,transform .12s,box-shadow .2s;display:flex}.lq-choice-btn:hover:not(:disabled){border-color:var(--col-main,#0ea5e9);background:#0ea5e90d;transform:translateY(-1px);box-shadow:0 2px 8px #0ea5e91a}.lq-choice-btn:active:not(:disabled){box-shadow:none;transform:scale(.99)}.lq-choice-btn:disabled{cursor:default}.lq-choice-label{background:var(--bg-body,#f1f5f9);color:#94a3b8;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:26px;height:26px;font-size:.8rem;font-weight:700;transition:background .25s,color .25s,border-radius .25s;display:flex}.lq-choice-text{flex:1}.lq-choice-btn.lq-selected{border-color:var(--col-main,#0ea5e9);background:#0ea5e912}.lq-choice-btn.lq-selected .lq-choice-label{background:var(--col-main,#0ea5e9);color:#fff;border-radius:50%}.lq-choice-btn.lq-choice-correct{background:#22c55e12;border-color:#22c55e}.lq-choice-btn.lq-choice-correct .lq-choice-label{color:#fff;background:#22c55e;border-radius:50%}.lq-choice-btn.lq-choice-wrong{background:#ef44440d;border-color:#ef4444}.lq-choice-btn.lq-choice-wrong .lq-choice-label{color:#fff;background:#ef4444;border-radius:50%}.lq-status{color:#15803d;text-align:center;background:#22c55e12;border-radius:10px;margin-top:12px;padding:10px 14px;font-size:.85rem;font-weight:600}.lq-result{margin-top:14px}.lq-chart{flex-direction:column;gap:6px;display:flex}.lq-bar-row{align-items:center;gap:8px;display:flex}.lq-bar-label{color:#94a3b8;text-align:center;flex-shrink:0;width:22px;font-size:.8rem;font-weight:700}.lq-bar-track{background:var(--bg-body,#f1f5f9);border-radius:6px;flex:1;height:24px;overflow:hidden}.lq-bar-fill{background:#cbd5e1;border-radius:6px;min-width:0;height:100%;transition:width .8s cubic-bezier(.25,.46,.45,.94)}.lq-bar-correct .lq-bar-fill{background:linear-gradient(90deg,#22c55e,#4ade80)}.lq-bar-correct .lq-bar-label{color:#22c55e;font-size:.95rem}.lq-bar-wrong .lq-bar-fill{background:linear-gradient(90deg,#ef4444,#f87171)}.lq-bar-count{color:#94a3b8;text-align:right;white-space:nowrap;min-width:65px;font-size:.75rem;font-weight:600}.lq-correct-label{text-align:center;border-radius:10px;margin-top:12px;padding:10px 14px;font-size:.95rem;font-weight:700}.lq-correct-icon{font-size:1.15em}.lq-wrong-icon{font-size:1.05em}.lq-explanation-display{border-left:3px solid var(--col-main,#0ea5e9);color:var(--text-main,#1e293b);background:#0ea5e90f;border-radius:10px;margin-top:12px;padding:12px 16px;font-size:.9rem;line-height:1.7}.lq-explanation-display p{margin:0}.live-quiz--intro .lq-explanation-display{border-left-color:var(--col-sub,#8b5cf6);background:#8b5cf60d}[data-theme=dark] .lq-explanation-display{background:#0ea5e914}[data-theme=dark] .live-quiz--intro .lq-explanation-display{background:#8b5cf614}.lq-teacher-ctrl{border-top:1px dashed var(--card-border,#cbd5e1);flex-wrap:wrap;align-items:center;gap:10px;margin-top:14px;padding-top:14px;display:flex}.lq-answer-count{color:var(--col-main,#0ea5e9);margin-right:auto;font-size:.82rem;font-weight:700}.lq-ctrl-btn{cursor:pointer;border:1.5px solid;border-radius:8px;min-height:36px;padding:7px 14px;font-family:inherit;font-size:.82rem;font-weight:700;transition:background .2s,transform .12s}.lq-ctrl-btn:active{transform:scale(.97)}.lq-ctrl-close{color:#c2410c;background:#fff7ed;border-color:#fb923c}.lq-ctrl-close:hover{background:#ffedd5}.lq-ctrl-reset{background:var(--bg-body,#f8fafc);color:#475569;border-color:#94a3b8}.lq-ctrl-reset:hover{background:#f1f5f9}[data-theme=dark] .live-quiz{background:0 0}[data-theme=dark] .card>.live-quiz{background:#0f172a99}[data-theme=dark] .lq-header{border-top-color:#334155}[data-theme=dark] .lq-choice-btn{color:#e2e8f0;background:#1e293b80;border-color:#334155}[data-theme=dark] .lq-choice-btn:hover:not(:disabled){background:#0ea5e91a}[data-theme=dark] .lq-choice-label{color:#94a3b8;background:#1e293b}[data-theme=dark] .lq-bar-track{background:#1e293b}[data-theme=dark] .lq-status{color:#4ade80;background:#22c55e1a}body:not(.teacher-mode) .lq-teacher-ctrl{display:none!important}@media (width<=767px){.lq-wrapper{padding:18px 16px 20px}.card>.live-quiz .lq-wrapper{padding:0 16px 20px}.lq-header{padding:12px 16px;font-size:.75rem}.lq-stem-display{font-size:.92em}.lq-choice-btn{gap:8px;padding:9px 12px;font-size:.88rem}.lq-choice-label{border-radius:6px;width:24px;height:24px;font-size:.75rem}.lq-bar-count{min-width:50px;font-size:.7rem}.lq-ctrl-btn{padding:6px 10px;font-size:.78rem}}.slide-mode-toggle-btn{display:none!important}.slide-mode-toggle-btn--active{color:#fff!important;background:#ef4444f2!important;border-color:#ef4444!important}.slide-mode-toggle-btn--active:hover{background:#dc2626!important;border-color:#dc2626!important}body.slide-mode{font-size:1.5em;line-height:1.6}body.slide-mode main,body.slide-mode #main-content{box-sizing:border-box;width:100%;padding-left:2vw;padding-right:2vw;max-width:none!important}body.slide-mode .card{margin-left:0;margin-right:0;padding:1.5rem 1.2rem;max-width:none!important}body.slide-mode .interactive-area{width:100%;max-width:none!important}body.slide-mode .card-tabs__list .card-tab{min-height:48px;padding:10px 16px;font-size:1em}.slide-tap-zone{color:#0ea5e98c;cursor:pointer;width:8vw;min-width:48px;max-width:80px;z-index:var(--z-slide-overlay);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;background:#0ea5e90f;border:none;justify-content:center;align-items:center;padding:0;font-size:28px;transition:background-color .15s,color .15s;display:none;position:fixed;top:15%;bottom:15%}.slide-tap-zone:hover,.slide-tap-zone:active{color:#0ea5e9;background:#0ea5e933}.slide-tap-zone--prev{border-radius:0 16px 16px 0;left:0}.slide-tap-zone--next{border-radius:16px 0 0 16px;right:0}body.slide-mode.teacher-mode .slide-tap-zone{display:flex}body.sim-fullscreen-active .slide-tap-zone{display:none!important}.slide-sim-fs-btn,.slide-sim-fs-close{color:#334155;cursor:pointer;z-index:3;background:#ffffffeb;border:1px solid #0000001f;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;padding:0;font-size:18px;line-height:1;display:none;position:absolute;top:8px;box-shadow:0 1px 4px #00000026}.slide-sim-fs-btn{right:8px}.slide-sim-fs-close{color:#fff;background:#ef4444f2;border-color:#ef4444;right:8px}body.slide-mode.teacher-mode .interactive-area .slide-sim-fs-btn{display:flex}.interactive-area.sim-fullscreen{background:var(--bg-card,#fff);box-sizing:border-box;justify-content:center;align-items:center;width:100vw!important;max-width:none!important;height:100vh!important;min-height:0!important;z-index:var(--z-slide-nav)!important;margin:0!important;padding:0!important;display:flex!important;position:fixed!important;inset:0!important}.interactive-area.sim-fullscreen>canvas,.interactive-area.sim-fullscreen>.p5Canvas{max-width:100%!important;max-height:100%!important}.interactive-area.sim-fullscreen .slide-sim-fs-btn{display:none}.interactive-area.sim-fullscreen .slide-sim-fs-close{display:flex}body.sim-fullscreen-active{overflow:hidden}@media print{.slide-mode-toggle-btn,.slide-tap-zone,.slide-sim-fs-btn,.slide-sim-fs-close{display:none!important}}.brief-toggle{right:1rem;bottom:var(--fab-stack-base);z-index:var(--z-fab);pointer-events:auto;border:1px solid var(--col-main);color:var(--col-main);font:inherit;cursor:pointer;white-space:nowrap;background:#fff;border-radius:999px;padding:.5em 1.1em;font-size:.92rem;font-weight:700;position:fixed;box-shadow:0 4px 14px -4px #1b2a4e47}.brief-toggle:hover,.brief-toggle--on{background:var(--col-main);color:#fff}body.brief-mode .detail{display:none!important}body.brief-mode .card>p{margin:.5em 0}@media print{.brief-toggle{display:none!important}body.brief-mode .detail{display:revert!important}}.interactive-area .sim-readout{text-align:center;color:var(--text-main,#334155);box-sizing:border-box;padding:6px 10px 0;font-size:.86rem;font-weight:700;line-height:1.5}body.brief-mode .interactive-area .sim-readout{font-size:.98rem}.print-btn{z-index:var(--z-fab);pointer-events:auto;border:1px solid var(--col-main);color:var(--col-main);cursor:pointer;background:#fff;border-radius:999px;padding:.5em 1.1em;font-size:.86rem;font-weight:700;position:fixed;bottom:7.6rem;right:1rem;box-shadow:0 2px 8px #0000001f}.print-btn:hover{background:var(--col-main);color:#fff}.print-btn[disabled]{opacity:.6;cursor:progress}.print-menu{z-index:var(--z-fab);pointer-events:auto;border:1px solid var(--col-border,#d7dee7);background:#fff;border-radius:12px;width:min(19rem,100vw - 2rem);position:fixed;bottom:10.6rem;right:1rem;overflow:hidden;box-shadow:0 6px 20px #00000029}.print-menu button{text-align:left;border:none;border-bottom:1px solid var(--col-border,#eef2f6);width:100%;color:var(--text-main,#334155);cursor:pointer;background:0 0;padding:.7em .9em;font-size:.9rem;font-weight:700;display:block}.print-menu button:last-child{border-bottom:none}.print-menu button:hover{background:var(--col-bg-sub,#f1f5f9)}.print-menu small{color:var(--text-sub,#64748b);margin-top:2px;font-size:.75rem;font-weight:400;line-height:1.45;display:block}.card.exercise-card{background:linear-gradient(180deg, #f59e0b12, #f59e0b00 180px), var(--card-bg,#ffffffd1);border-left:5px solid #f59e0b}.card.exercise-card>h2{color:#b45309;border-left-color:#f59e0b}.exercise-card-body{margin-top:10px}.exercise-card-item+.exercise-card-item{border-top:1px dashed #f59e0b73;margin-top:26px;padding-top:22px}.exercise-card-no{color:#b45309;background:#f59e0b29;border-radius:999px;margin-bottom:8px;padding:2px 12px;font-size:.85rem;font-weight:700;display:inline-block}.exercise-card-loading,.exercise-card-empty{color:var(--text-sub);font-size:.95rem}.subpage-view,.subpage-track{display:block}.subpage{width:100%;display:block}.subpage--sep{border-top:1px solid var(--card-border,#e2e8f0);margin-top:2.2em;padding-top:1.6em}.subpage--sep>h3:first-child{margin-top:0}.ink-writing .subpage,section.card.ink-has .subpage,section.card.ink-has.reveal-target{opacity:1!important;transition:none!important;transform:none!important}.art-slot{max-width:640px;margin:20px auto}@media (width>=760px){.art-slot--right,.art-slot--left{width:44%;max-width:340px;margin-top:6px;margin-bottom:12px}.art-slot--right{float:right;margin-left:22px;margin-right:0}.art-slot--left{float:left;margin-left:0;margin-right:22px}}.art-slot--empty{border:2px dashed var(--col-main,#0ea5e9);text-align:center;background:#0ea5e90a;border-radius:14px;padding:18px 16px}.art-slot__head{color:var(--col-main,#0ea5e9);justify-content:center;align-items:center;gap:8px;font-weight:800;display:flex}.art-slot__ico{font-size:1.3em}.art-slot__title{letter-spacing:.02em}.art-slot__what{color:var(--text-sub,#64748b);margin-top:6px;font-size:.95rem}.art-slot__note{text-align:left;color:#c2410c;max-width:560px;margin:8px auto 0;font-size:.82rem;line-height:1.55}.art-slot__prompt{text-align:left;border-top:1px solid var(--card-border,#e2e8f0);margin-top:12px;padding-top:10px}.art-slot__prompt>summary{cursor:pointer;color:var(--text-sub,#64748b);font-size:.85rem;font-weight:700}.art-slot__text{box-sizing:border-box;border:1px solid var(--card-border,#e2e8f0);background:var(--card-bg,#fff);width:100%;color:var(--text-main,#1e293b);resize:vertical;border-radius:8px;margin-top:8px;padding:8px 10px;font-family:inherit;font-size:.82rem;line-height:1.6}.art-slot__row{flex-wrap:wrap;align-items:center;gap:8px 12px;margin-top:8px;display:flex}.art-slot__btn{background:var(--col-main,#0ea5e9);color:#fff;cursor:pointer;border:none;border-radius:8px;min-height:36px;padding:8px 14px;font-size:.82rem;font-weight:700}.art-slot__btn:hover{opacity:.9}.art-slot__where{color:var(--text-sub,#94a3b8);font-size:.74rem}.art-slot--filled img{border:1px solid var(--card-border,#e2e8f0);border-radius:14px;width:100%;height:auto;display:block}.art-slot__cap{text-align:center;color:var(--text-sub,#64748b);margin-top:6px;font-size:.8rem}@media print{.art-slot--empty{display:none!important}}:root{--col-blank:#b91c1c}:where(html:not(.lesson-v2)) body:not(.note-mode) [data-note=blank]:not(.bm-cloze){color:var(--col-blank);font-weight:800}:where(html:not(.lesson-v2)) body:not(.note-mode) [data-note=blank]:not(.bm-cloze) mjx-container,:where(html:not(.lesson-v2)) body:not(.note-mode) [data-note=blank]:not(.bm-cloze) mjx-container *{color:var(--col-blank)}:where(html:not(.lesson-v2)) body:not(.note-mode) .cloze:not(.bm-cloze){cursor:auto;min-width:0;min-height:0;color:var(--col-blank);-webkit-user-select:auto;user-select:auto;background:0 0;border:none;padding:0;font-weight:800;display:inline}:where(html:not(.lesson-v2)) body:not(.note-mode) .cloze:not(.bm-cloze):after{content:none}:where(html:not(.lesson-v2)) body:not(.note-mode) .cloze:not(.bm-cloze) mjx-container,:where(html:not(.lesson-v2)) body:not(.note-mode) .cloze:not(.bm-cloze) mjx-container *{color:var(--col-blank)}html.lesson-v2{--blank-fs:1.4;--blank-fs-math:1.25;--blank-fs-box:1.15;--blank-fs-nested:1.167;--blank-fs-nested-math:1.08}@media (width<=768px){html.lesson-v2{--blank-fs:1.3;--blank-fs-math:1.15;--blank-fs-box:1.1;--blank-fs-nested:1.238;--blank-fs-nested-math:1.08}}@media (width<=480px){html.lesson-v2{--blank-fs-math:1.08;--blank-fs-box:1.05}}html.lesson-v2 [data-note=blank]:not(.revealed),html.lesson-v2 .cloze:not(.revealed):not(.editing){color:#0000!important}html.lesson-v2 [data-note=blank]:not(.revealed)>*,html.lesson-v2 .cloze:not(.revealed):not(.editing)>*{visibility:hidden!important}html.lesson-v2 body:not(.teacher-mode) [data-note=blank]:not(.revealed),html.lesson-v2 body:not(.teacher-mode) .cloze:not(.revealed){-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}html.lesson-v2:not(.pdf-mode) [data-note=blank],html.lesson-v2:not(.pdf-mode) .cloze{--bfs:var(--blank-fs)}:is(html.lesson-v2:not(.pdf-mode) [data-note=blank]:has(mjx-container),html.lesson-v2:not(.pdf-mode) .cloze:has(mjx-container)){--bfs:var(--blank-fs-math)}:is(html.lesson-v2:not(.pdf-mode) .formula-box [data-note=blank]:has(mjx-container),html.lesson-v2:not(.pdf-mode) .formula-box .cloze:has(mjx-container)){--bfs:var(--blank-fs-box)}html.lesson-v2:not(.pdf-mode) strong [data-note=blank],html.lesson-v2:not(.pdf-mode) strong .cloze,html.lesson-v2:not(.pdf-mode) .highlight [data-note=blank],html.lesson-v2:not(.pdf-mode) .highlight .cloze{--bfs:var(--blank-fs-nested)}html.lesson-v2:not(.pdf-mode) .highlight [data-note=blank]:has(mjx-container){--bfs:var(--blank-fs-nested-math)}html.lesson-v2:not(.pdf-mode) strong [data-note=blank]:has(mjx-container){--bfs:var(--blank-fs-nested-math)}html.lesson-v2:not(.pdf-mode) [data-note=blank],html.lesson-v2:not(.pdf-mode) .cloze,html.lesson-v2:not(.pdf-mode) .cloze.revealed{font-size:calc(var(--bfs,1) * 1em)}html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank],html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze{box-sizing:border-box;text-align:center;vertical-align:baseline;white-space:nowrap;cursor:pointer;pointer-events:auto;-webkit-tap-highlight-color:transparent;background:#0ea5e912;border:1.5px dashed #94a3b8;border-radius:8px;min-width:3em;min-height:0;margin:0 .1em;padding:0 .35em;font-weight:800;line-height:1;transition:background-color .15s,border-color .15s;display:inline-block;position:relative}:is(html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank]:has(mjx-container),html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze:has(mjx-container)){min-width:2.4em;padding:0 .3em}@media (width<=480px){:is(html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank]:has(mjx-container),html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze:has(mjx-container)){min-width:2.2em;margin:0 .05em;padding:0 .2em}}html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank].blank-tight,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze.blank-tight{min-width:0;margin:0;padding:0 .1em}html.lesson-v2 body:not(.brief-mode) .cloze:before{content:none!important;display:none!important}html.lesson-v2 body[data-cloze-lock=true] .cloze:not(.cloze-unlocked){pointer-events:auto}html.lesson-v2 body[data-cloze-lock=true] .cloze:not(.cloze-unlocked):before{content:none}@media (hover:hover){html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank]:not(.revealed):hover,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze:not(.revealed):hover{background:#0ea5e924;border-color:#64748b}}html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank]:focus-visible,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze:focus-visible{outline:2px solid var(--col-main,#0ea5e9);outline-offset:2px}html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank].revealed,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze.revealed{color:var(--col-blank);box-shadow:none;-webkit-user-select:text;user-select:text;background:0 0;border:1.5px solid #0000;border-radius:8px}html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank].revealed mjx-container,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) [data-note=blank].revealed mjx-container *,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze.revealed mjx-container,html.lesson-v2:not(.pdf-mode) body:not(.brief-mode) .cloze.revealed mjx-container *{color:var(--col-blank)}@keyframes blankIn{0%{color:#0000;transform:scale(.86)}}@keyframes blankInFlat{0%{color:#0000}}@keyframes blankKidIn{0%{opacity:0}}html.lesson-v2:not(.pdf-mode) .cloze.revealed{animation:none}@media (prefers-reduced-motion:no-preference){html.lesson-v2:not(.pdf-mode) [data-note=blank].revealed.blank-in,html.lesson-v2:not(.pdf-mode) .cloze.revealed.blank-in{animation:.5s cubic-bezier(.22,.61,.36,1) blankIn}html.lesson-v2.ink-writing [data-note=blank].revealed.blank-in,html.lesson-v2.ink-writing .cloze.revealed.blank-in,html.lesson-v2 .card.ink-has [data-note=blank].revealed.blank-in,html.lesson-v2 .card.ink-has .cloze.revealed.blank-in{animation-name:blankInFlat}html.lesson-v2:not(.pdf-mode) [data-note=blank].revealed.blank-in>*,html.lesson-v2:not(.pdf-mode) .cloze.revealed.blank-in>*{animation:.5s cubic-bezier(.22,.61,.36,1) blankKidIn}}body[data-blank-lock=true] #btn-answers{display:none!important}.art-slot--mid{max-width:420px}.art-row{flex-wrap:wrap;justify-content:center;gap:12px 10px;margin:18px 0 22px;display:flex}.art-row .art-slot{flex:96px;min-width:92px;max-width:128px;margin:0}.art-row .art-slot--filled img{aspect-ratio:1;-o-object-fit:cover;object-fit:cover;border-radius:14px}.art-row .art-slot--empty{aspect-ratio:1;text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:8px 6px;display:flex}.art-row .art-slot--empty .art-slot__title{display:none}.art-row .art-slot--empty .art-slot__ico{font-size:1.1em}.art-row .art-slot--empty .art-slot__what{margin-top:2px;font-size:.7rem;line-height:1.35}.art-row .art-slot__prompt{display:none}.art-row .art-slot__drop{border:none;margin-top:6px;padding:4px;font-size:0}.art-row .art-slot__drop>span{display:none}.art-row .art-slot__drop .art-slot__btn{min-height:28px;margin-top:0;padding:4px 8px;font-size:.7rem}.art-row .art-slot__msg{font-size:.66rem}.art-row .art-slot__cap{margin-top:4px;font-size:.72rem;line-height:1.35}@media (width<=480px){.art-row .art-slot{width:96px;max-width:96px}}.art-slot__drop{border:2px dashed var(--card-border,#cbd5e1);text-align:center;color:var(--text-sub,#64748b);border-radius:10px;margin-top:10px;padding:12px 10px;font-size:.8rem;transition:border-color .15s,background .15s}.art-slot__drop.over{border-color:var(--col-main,#0ea5e9);background:#0ea5e912}.art-slot__drop .art-slot__btn{margin-top:8px}.art-slot__msg{margin-top:8px;font-size:.78rem}.art-slot.art-slot--over{outline:3px dashed var(--col-main,#0ea5e9);outline-offset:3px;background:#0ea5e912}.art-slot--filled.art-slot--over img{opacity:.55}.art-slot__drop--replace{text-align:right;border:none;margin-top:4px;padding:0;font-size:0}.art-slot__drop--replace .art-slot__btn{min-height:28px;color:var(--col-main,#0ea5e9);background:0 0;border:1px solid;margin-top:0;padding:3px 10px;font-size:.72rem}.art-slot__drop--replace .art-slot__btn--prompt{margin-right:6px}.art-row .art-slot__drop--replace .art-slot__btn--prompt{margin:0 0 4px}.art-slot__drop--replace .art-slot__msg{text-align:right;font-size:.74rem}.art-slot__drop--replace .art-slot__msg:empty{display:none}.art-row .art-slot__drop--replace{text-align:center}.art-row .art-slot__drop--replace .art-slot__btn{width:100%;padding:2px 4px;font-size:.66rem}body.note-mode .art-slot__drop--replace,body[data-classroom-active=true] .art-slot__drop--replace{display:none!important}@media print{.art-slot__drop--replace{display:none!important}}.art-slot__toast{left:50%;bottom:calc(24px + var(--safe-b,0px));z-index:30000;color:#fff;background:#1e293b;border-radius:10px;max-width:calc(100vw - 32px);padding:10px 16px;font-size:.86rem;font-weight:700;position:fixed;transform:translate(-50%);box-shadow:0 6px 20px #0f172a40}.art-slot__msg--ok{color:#15803d;font-weight:700}.art-slot__msg--ng{color:#c2410c;font-weight:700}.tb-bar{z-index:30000;color:#fff;background:0 0;align-items:center;gap:8px;padding:0;font-size:13px;display:flex;position:absolute}.tb-btn{background:var(--col-main,#0ea5e9);color:#fff;min-height:36px;font:inherit;letter-spacing:.02em;cursor:pointer;white-space:nowrap;border:2px solid #fff;border-radius:18px;justify-content:center;align-items:center;gap:5px;padding:0 14px 0 11px;font-size:13px;font-weight:700;line-height:1;transition:transform .15s,box-shadow .15s;display:inline-flex;box-shadow:0 3px 12px #0284c761}.tb-btn:hover{transform:scale(1.1);box-shadow:0 4px 14px #00000040}.tb-btn--danger{background:#b91c1c;box-shadow:0 3px 12px #b91c1c59}.tb-msg{white-space:nowrap}.tb-msg:empty{display:none}.tb-msg:not(:empty){background:#0f172a;border:2px solid #fff;border-radius:18px;align-items:center;min-height:36px;padding:0 12px;display:inline-flex;box-shadow:0 3px 12px #0f172a4d}@media (width<=768px){.tb-btn,.tb-msg:not(:empty){min-height:44px;padding:0 16px 0 13px}}.tb-toast{left:50%;bottom:calc(var(--safe-b,0px) + 84px);z-index:30000;color:#fff;text-align:center;background:#0f172a;border-radius:12px;max-width:min(92vw,560px);padding:10px 16px;font-size:13px;font-weight:700;line-height:1.5;position:fixed;transform:translate(-50%);box-shadow:0 6px 22px #0f172a52}body[data-classroom-active=true] .tb-bar,body[data-classroom-active=true] .tb-toast{display:none!important}@media (pointer:coarse){html.tb-edit.lesson-v2 body.teacher-mode [data-note=blank]:not(.revealed){-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}}.tx-block{border:1px solid var(--card-border,#e2e8f0);border-left:4px solid var(--col-main,#0ea5e9);background:#0ea5e90a;border-radius:10px;margin-top:14px;padding:12px 14px;font-size:.88rem}.tx-set+.tx-set{margin-top:12px}.tx-label{color:var(--text-main,#1e293b);margin-bottom:6px;font-weight:800}.tx-choices{margin:0;padding-left:1.6em;list-style:decimal}.tx-choice{margin:4px 0;line-height:1.6}.tx-choice--ok{background:#22c55e1f;border-radius:6px;padding:2px 6px}.tx-mark{margin-right:4px}.tx-why{color:var(--text-sub,#64748b);margin-top:2px;font-size:.8rem;display:block}.tx-exp{margin-top:10px}.tx-exp>summary{cursor:pointer;color:var(--col-main,#0ea5e9);font-weight:700}.tx-exp-body{margin-top:8px;font-size:.86rem}section.card.card--split,section.card.card--split:hover{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border-color:#0000;padding:0}.card--split .subpage{box-sizing:border-box;background:var(--card-bg,#fff);border:var(--card-border-width,1px) solid var(--card-border,#e2e8f0);box-shadow:var(--card-shadow,0 4px 18px #94a3b824);border-radius:20px;margin:0 0 22px;padding:clamp(18px,3.6vw,36px) clamp(16px,4vw,40px);display:flow-root}.card--split .subpage>:first-child{margin-top:0}.card--split .subpage>:last-child{margin-bottom:0}.card--split .subpage--sep{border-top:var(--card-border-width,1px) solid var(--card-border,#e2e8f0);margin-top:0;padding-top:clamp(18px,3.6vw,36px)}.card--split .subpage.reveal-target{opacity:0;transition:opacity .75s cubic-bezier(.16,1,.3,1),transform .75s cubic-bezier(.16,1,.3,1);transform:translateY(34px)scale(.975)}.card--split .subpage.reveal-target.reveal-show{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.card--split .subpage.reveal-target{opacity:1;transition:none;transform:none}}.exercise-card .subpage--sep{border-top:1px solid var(--card-border,#e2e8f0);margin-top:2em;padding-top:1.6em}@media (width>=760px){.card .art-slot:not(.art-slot--wide):not(.art-slot--mid){float:right;width:38%;max-width:300px;margin:4px 0 12px 22px}.card .art-slot.art-slot--left:not(.art-slot--wide){float:left;margin:4px 22px 12px 0}.card .art-row .art-slot{float:none;width:auto;margin:0}.card .art-slot.art-slot--sm:not(.art-slot--wide):not(.art-slot--mid){width:30%;max-width:230px}}.art-slot--wide{max-width:640px}.art-slot--filled img{box-shadow:0 4px 14px #0f172a1a}.art-slot__mini{width:100%;min-height:28px;margin-top:6px;padding:4px 8px;font-size:.68rem}ol.step-list{counter-reset:step;margin:1em 0;padding:0;list-style:none}ol.step-list>li{counter-increment:step;background:#0ea5e90d;border:1px solid #0ea5e929;border-radius:14px;margin:0 0 14px;padding:14px 16px 14px 60px;display:flow-root;position:relative}ol.step-list>li:before{content:counter(step);color:#fff;background:linear-gradient(135deg,#0ea5e9,#6366f1);border-radius:50%;justify-content:center;align-items:center;width:34px;height:34px;font-weight:800;display:flex;position:absolute;top:12px;left:14px;box-shadow:0 2px 6px #4f46e54d}.step-title{color:var(--text-main,#1e293b);margin-bottom:4px;font-size:1.06em;font-weight:800;line-height:1.5}ol.step-list>li>p{margin:4px 0}ol.step-list>li>ul{margin:6px 0 4px}.card-tabs{border-radius:0 0 16px 16px}.card-nav{gap:4px;padding:6px 8px 9px;position:relative}.card-nav__prev,.card-nav__next{color:var(--col-main,#0ea5e9);background:#0ea5e914;border-radius:50%}.card-nav__prev:hover:not(:disabled),.card-nav__next:hover:not(:disabled){background:#0ea5e92e}.card-nav__count{letter-spacing:.02em;background:linear-gradient(120deg,#0ea5e9,#6366f1);padding:3px 10px;font-size:.74em}.card-nav__label{font-size:1.06em;font-weight:800}.card-nav__progress{pointer-events:none;background:#94a3b840;border-radius:999px;height:3px;position:absolute;bottom:3px;left:12px;right:12px;overflow:hidden}.card-nav__progress>span{background:linear-gradient(90deg,#0ea5e9,#6366f1);border-radius:999px;width:0;height:100%;transition:width .45s cubic-bezier(.16,1,.3,1);display:block}@media (width>=760px){.print-sim-wrapper.sim-wrap--mid{width:50%;max-width:460px}.print-sim-wrapper:has(>.interactive-area--mid){width:50%;max-width:460px}:not(.print-sim-wrapper)>.interactive-area--mid{width:50%;max-width:460px}}.live-quiz--intro:not([data-key-question]){display:none!important}.card .box-alert,.card .formula-box,.card .term-box{clear:both}.card p:has(>mjx-container[display=true]){clear:both}.card .formula-box.text-mode{text-align:center;background:linear-gradient(135deg,#6366f114,#0ea5e912);border:2px solid #6366f18c;border-radius:14px;margin:1.5em 0 1.3em;padding:1.25em 1.2em 1em;box-shadow:0 4px 14px #6366f11a}.card .formula-box.text-mode:before{content:"📜 法則";letter-spacing:.06em;color:#fff;background:linear-gradient(135deg,#6366f1,#0ea5e9);border-radius:999px;padding:.12em .9em;font-size:.8rem;font-weight:800;position:absolute;top:-.85em;left:18px;box-shadow:0 2px 6px #6366f159}.card .formula-box.text-mode>div:first-child{font-size:1.16rem;font-weight:700;line-height:1.75}.card .term-box+.term-box{margin-top:-8px}.print-sim-wrapper .sim-gallery-link-wrap{margin-top:6px}.card-nav{-webkit-backdrop-filter:blur(14px)saturate(1.4);background:#ffffffdb;border:1px solid #6366f129;border-radius:18px;align-items:center;gap:8px;padding:7px 10px 11px;display:flex;overflow:hidden;box-shadow:0 8px 24px #1e293b1a,inset 0 1px #ffffffe6}[data-theme=dark] .card-nav{background:#1e293bdb;border-color:#94a3b840}.card-nav__prev,.card-nav__next{color:#fff;background:linear-gradient(135deg,#0ea5e9,#6366f1);border:none;border-radius:50%;flex:none;width:42px;height:42px;font-size:.95rem;transition:transform .18s,box-shadow .18s,opacity .18s;box-shadow:0 4px 12px #4f46e54d}.card-nav__prev:hover:not(:disabled),.card-nav__next:hover:not(:disabled){background:linear-gradient(135deg,#0ea5e9,#6366f1);transform:translateY(-1px)scale(1.05);box-shadow:0 6px 16px #4f46e566}.card-nav__prev:disabled,.card-nav__next:disabled{color:#64748bb3;box-shadow:none;opacity:1;background:#94a3b840}.card-nav__title{border-radius:12px;flex:auto;justify-content:center;align-items:center;gap:10px;min-width:0;padding:6px 12px;transition:background .18s;display:flex}.card-nav__title:hover,.card-nav__title--open{background:#6366f117}.card-nav__count{letter-spacing:.04em;color:#4f46e5;background:#6366f11f;border-radius:999px;flex:none;padding:3px 11px;font-size:.74rem;font-weight:800}.card-nav__label{text-overflow:ellipsis;white-space:nowrap;min-width:0;color:var(--text-main);font-size:1.1em;font-weight:800;overflow:hidden}.card-nav__chev{color:#6366f1;flex:none;font-size:.8rem;transition:transform .2s}.card-nav__title--open .card-nav__chev{transform:rotate(180deg)}.card-nav__progress{background:#6366f11a;border-radius:0;height:4px;bottom:0;left:0;right:0}.card-nav__progress>span{background:linear-gradient(90deg,#0ea5e9,#6366f1,#a855f7);border-radius:0 4px 4px 0}@media (width<=520px){.card-nav{border-radius:14px;gap:4px;padding:6px 6px 10px}.card-nav__prev,.card-nav__next{width:38px;height:38px}.card-nav__title{gap:6px;padding:6px 4px}.card-nav__label{font-size:.98em}}.box-alert.box-alert--key{background:#e11d480e;border-color:#e11d488c}.box-alert.box-alert--key .box-alert-label{background:linear-gradient(135deg,#e11d48,#f43f5e);box-shadow:0 2px 8px #e11d484d}.box-alert.box-alert--note{background:#0d94880e;border-color:#0d948880}.box-alert.box-alert--note .box-alert-label{background:linear-gradient(135deg,#0d9488,#14b8a6);box-shadow:0 2px 8px #0d94884d}.card-nav__label{flex:0 auto}.card-nav__chev{margin-left:2px;font-size:1.05rem}.qr-tv .qr-tv-choice{cursor:default;text-align:left;flex-wrap:wrap;align-items:center;gap:4px 10px;display:flex;position:relative;overflow:hidden}.qr-tv .qr-tv-choice>*{position:relative}.qr-tv .qr-tv-bar{pointer-events:none;background:#0ea5e929;width:0;transition:width .35s;top:0;bottom:0;left:0;position:absolute!important}.qr-tv .qr-tv-text{flex:auto;min-width:0}.qr-tv .qr-tv-count{color:#0369a1;background:#0ea5e929;border-radius:999px;flex:none;margin-left:auto;padding:1px 10px;font:800 .86rem/1.6 system-ui,sans-serif}.qr-tv .qr-tv-count--zero{color:#94a3b8;background:#94a3b829}.qr-tv .qr-tv-choice.correct{background:#22c55e1a;border-color:#16a34a}.qr-tv .qr-tv-choice.correct .qr-tv-bar{background:#22c55e38}.qr-tv .qr-tv-choice.correct .qr-tv-text:after{content:" ✅"}.qr-tv .qr-tv-why{color:#64748b;flex:1 0 100%;font:500 .8rem/1.6 system-ui,sans-serif}.tv-bar{flex-wrap:wrap;align-items:center;gap:10px 16px;margin-top:14px;display:flex}.tv-status{color:var(--text-main);font-size:.95rem}.tv-status b{color:#0369a1;font-size:1.25rem}.tv-unknown,.tv-idle{color:var(--text-sub);margin-left:6px;font-size:.82rem}.tv-reveal{color:#fff;cursor:pointer;background:linear-gradient(135deg,#16a34a,#0d9488);border:none;border-radius:999px;margin-left:auto;padding:10px 22px;font-size:.98rem;font-weight:800;box-shadow:0 4px 12px #0d94884d}.tv-reveal:disabled{color:#64748b;box-shadow:none;cursor:default;background:#94a3b84d}.tv-exp{border:1px solid var(--card-border,#e2e8f0);background:#22c55e0a;border-left:4px solid #16a34a;border-radius:10px;margin-top:14px;padding:14px 16px;font-size:.9rem}.tv-exp-head{color:#15803d;margin-bottom:8px;font-weight:800}.tv-exp-body .sim-embed{max-width:460px;margin:16px auto;position:relative}.tv-exp-body .sim-embed.sim-embed--wide{max-width:760px}.tv-exp-body .sim-embed canvas{max-width:100%;display:block}.card .card-feedback,.card .cs-tcard{clear:both}section.card h4{clear:both;border-left:5px solid var(--col-sub,#8b5cf6);color:var(--text-main);margin:1.9em 0 .8em;padding:.15em 0 .15em .7em;font-size:1.08rem;font-weight:800;line-height:1.5}.card .formula-box.text-mode:before{display:block}.card .box-alert,.card .formula-box.text-mode{-webkit-backdrop-filter:none;backdrop-filter:none;box-shadow:none;border-width:1.5px;border-radius:14px;margin:30px auto 24px;padding:22px 22px 16px}.card .box-alert{background:#f59e0b0d;border-color:#f59e0b73}.card .box-alert.box-alert--key{background:#e11d480a;border-color:#e11d4873}.card .box-alert.box-alert--note{background:#0d94880b;border-color:#0d94886b}.card .formula-box.text-mode{background:#6366f10d;border-color:#6366f173}.card .box-alert-label,.card .formula-box.text-mode:before{letter-spacing:.04em;box-shadow:none;border-radius:999px;padding:2px 13px;font-size:.82rem;font-weight:800;top:-13px;left:18px}.card .box-alert>p:last-child,.card .box-alert>ul:last-child{margin-bottom:0}.card .term-box{background:#0ea5e90e;border-radius:12px;margin:16px 0;padding:12px 16px}.card .term-icon{margin-right:12px;font-size:1.25em}.card .highlight{background:linear-gradient(#0000 55%,#facc158c 55%);border-radius:0;padding:0 2px}:where(html:not(.lesson-v2)) body:not(.note-mode) .cloze:not(.bm-cloze):before{content:none!important;display:none!important}:where(html:not(.lesson-v2)) body:not(.note-mode) .cloze:not(.bm-cloze):not(.revealed):not(.editing)>*{visibility:visible;opacity:1}:where(html:not(.lesson-v2)) body:not(.note-mode) .formula-box .cloze:not(.bm-cloze){font-size:inherit}.sim-fs-inner .interactive-area{float:none!important;max-width:none!important;margin:0!important}.sim-fs-stage:fullscreen .sim-fs-inner{opacity:0}.sim-fs-stage.sim-fs-ready:fullscreen .sim-fs-inner{opacity:1;transition:opacity .18s}.interactive-area[data-sim-size=m] .sim-btn{min-height:34px;font-size:.8rem;min-width:0!important;padding:4px 12px!important}.interactive-area[data-sim-size=s] .sim-btn{min-height:30px;box-shadow:none;font-size:.72rem;min-width:0!important;padding:3px 10px!important}.interactive-area[data-sim-size=m]>.sim-ctrl-band{gap:5px 10px!important;padding:4px 8px!important}.interactive-area[data-sim-size=s]>.sim-ctrl-band{gap:4px 7px!important;padding:3px 6px!important;bottom:6px!important}.interactive-area[data-sim-size=m]>.sim-ctrl-band input[type=range]{width:88px!important}.interactive-area[data-sim-size=s]>.sim-ctrl-band input[type=range]{width:72px!important;height:22px!important}.interactive-area[data-sim-size=s]>.sim-ctrl-band span,.interactive-area[data-sim-size=s]>.sim-ctrl-band label{min-width:0!important;font-size:10.5px!important}.interactive-area[data-sim-size=m]>.sim-ctrl-band span,.interactive-area[data-sim-size=m]>.sim-ctrl-band label{font-size:11px!important}.interactive-area[data-sim-size=s] .sim-readout{padding:3px 6px;font-size:.72rem;line-height:1.45}.interactive-area[data-sim-size=m] .sim-readout{padding:4px 8px;font-size:.8rem}@media (width<=759px) and (pointer:coarse){.interactive-area[data-sim-size=s] .sim-btn{min-height:36px;font-size:.78rem;padding:4px 12px!important}.interactive-area[data-sim-size=s]>.sim-ctrl-band input[type=range]{width:96px!important;height:30px!important}}.interactive-area[id^=fig-]{box-shadow:none;background:0 0;border-color:#0000;border-radius:12px}.print-sim-wrapper:has(>.interactive-area[id^=fig-]) .sim-gallery-link-wrap{display:none}.print-sim-wrapper:has(>.interactive-area[id^=fig-]) .ann-sim-label{margin-bottom:2px}.interactive-area .sim-btn,#sim-target-area .sim-btn{transition:transform .25s cubic-bezier(.4,0,.2,1),background-color .25s,color .25s,border-color .25s,box-shadow .25s}.card .formula-box.formula-important[data-label]:before,.card .formula-box.compact[data-label]:before{content:attr(data-label)}.art-slot--filled img,.art-row .art-slot--filled img{box-shadow:none;mix-blend-mode:multiply;-webkit-mask-composite:source-in;-webkit-mask-composite:source-in, xor;background:0 0;border:none;border-radius:8px;-webkit-mask-image:linear-gradient(90deg,#0000 0,#000 5% 95%,#0000 100%),linear-gradient(#0000 0,#000 6% 94%,#0000 100%);mask-image:linear-gradient(90deg,#0000 0,#000 5% 95%,#0000 100%),linear-gradient(#0000 0,#000 6% 94%,#0000 100%);-webkit-mask-composite:source-in;mask-composite:intersect}.art-slot--filled{box-shadow:none;background:0 0;border:none}.art-slot__cap{margin-top:2px;font-size:.76rem}.interactive-area.interactive-area--wide{max-width:1040px}.print-sim-wrapper:has(>.interactive-area--wide) .sim-gallery-link-wrap{max-width:1040px}.formula-box.compact:not(.formula-important):before{content:"📐 公式"}.formula-box.formula-important:before{content:"💎 重要公式"}.card .formula-box.compact:not(.formula-important)[data-label]:before{content:"📐 " attr(data-label)}.card .formula-box.formula-important[data-label]:before{content:"💎 " attr(data-label)}.card .formula-box.compact:not(.formula-important)[data-label][data-icon]:before,.card .formula-box.formula-important[data-label][data-icon]:before{content:attr(data-icon) " " attr(data-label)}.card .formula-box.text-mode[data-label]:before{content:"📜 " attr(data-label)}.card .formula-box.text-mode[data-label=定義]:before{content:"📖 定義"}.card .formula-box.text-mode[data-label=定石]:before{content:"♟️ 定石"}.card .formula-box.text-mode[data-label=考え方]:before{content:"💭 考え方"}.card .formula-box.text-mode[data-label=結論]:before{content:"✅ 結論"}.card .formula-box.text-mode[data-label=条件]:before{content:"🔑 条件"}.card .formula-box.text-mode[data-label][data-icon]:before{content:attr(data-icon) " " attr(data-label)}.exercise-card-no:before{content:"✏️ "}.exercise-card-headline{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;display:flex}.exercise-card-headline .exercise-card-no{margin-bottom:0}.ex-tag{letter-spacing:.12em;border:1.5px solid;border-radius:6px;padding:2px 12px;font-size:.88rem;font-weight:800;line-height:1.5;display:inline-block}@media (width>=760px){.print-sim-wrapper.sim-wrap--right{margin-bottom:18px;margin-left:36px}.print-sim-wrapper:has(>.interactive-area--right){margin-bottom:18px;margin-left:36px}.print-sim-wrapper.sim-wrap--left{margin-bottom:18px;margin-right:36px}.print-sim-wrapper:has(>.interactive-area--left){margin-bottom:18px;margin-right:36px}:not(.print-sim-wrapper)>.interactive-area--right{margin-left:36px}:not(.print-sim-wrapper)>.interactive-area--left{margin-right:36px}.card .art-slot:not(.art-slot--wide):not(.art-slot--mid):not(.art-slot--left){margin-left:32px}.card .art-slot.art-slot--left:not(.art-slot--wide){margin-right:32px}.card .art-row .art-slot{margin:0}.card .sim-wrap--left+ul,.card .sim-wrap--left+ol,.card .sim-wrap--left+*+ul,.card .sim-wrap--left+*+ol,.card .sim-wrap--left+*+*+ul,.card .sim-wrap--left+*+*+ol,.card .sim-wrap--left+*+*+*+ul,.card .sim-wrap--left+*+*+*+ol,.card .interactive-area--left+ul,.card .interactive-area--left+ol,.card .interactive-area--left+*+ul,.card .interactive-area--left+*+ol,.card .interactive-area--left+*+*+ul,.card .interactive-area--left+*+*+ol,.card .interactive-area--left+*+*+*+ul,.card .interactive-area--left+*+*+*+ol,.card .art-slot--left+ul,.card .art-slot--left+ol,.card .art-slot--left+*+ul,.card .art-slot--left+*+ol,.card .art-slot--left+*+*+ul,.card .art-slot--left+*+*+ol,.card .art-slot--left+*+*+*+ul,.card .art-slot--left+*+*+*+ol{display:flow-root}.card ol.step-list.step-list{display:block}}.card ul.point-list.point-list{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:1em 0;padding:0;list-style:none;display:grid}.card ul.point-list>li{background:#6366f10b;border:1px solid #6366f129;border-radius:14px;margin:0;padding:12px 14px 12px 18px;position:relative;overflow:hidden}.card ul.point-list>li:before{content:"";background:linear-gradient(#0ea5e9,#6366f1);width:5px;position:absolute;top:0;bottom:0;left:0}.card ul.point-list>li::marker{content:none}.point-title{color:var(--text-main,#1e293b);margin-bottom:3px;font-size:1.04em;font-weight:800;line-height:1.5}.card ul.point-list>li>p{margin:3px 0;line-height:1.75}.card ul.point-list>li>p:last-child{margin-bottom:0}.card ul.point-list.point-list--2{grid-template-columns:repeat(2,minmax(0,1fr))}.card ul.point-list.point-list--1{grid-template-columns:minmax(0,1fr)}@media (width<=560px){.card ul.point-list.point-list--2{grid-template-columns:1fr}}.card .fig-steps{clear:both;-moz-column-gap:36px;grid-template-columns:minmax(0,1fr) min(340px,44%);align-items:start;column-gap:36px;margin:1.1em 0;display:grid}.card .fig-steps.fig-steps--mid{grid-template-columns:minmax(0,1fr) min(460px,48%)}.card .fig-steps.fig-steps--left{grid-template-columns:min(340px,44%) minmax(0,1fr)}.card .fig-steps.fig-steps--left.fig-steps--mid{grid-template-columns:min(460px,48%) minmax(0,1fr)}.card .fig-steps>.fig-steps__text{grid-area:1/1;align-self:center;min-width:0}.card .fig-steps>.fig-steps__fig{grid-area:1/2;align-self:start;min-width:0;position:sticky;top:84px}.card .fig-steps.fig-steps--left>.fig-steps__text{grid-column:2}.card .fig-steps.fig-steps--left>.fig-steps__fig{grid-column:1}.card .fig-steps>.fig-steps__text>:first-child{margin-top:0}.card .fig-steps>.fig-steps__text>:last-child,.card .fig-steps>.fig-steps__text>ol.step-list>li:last-child,.card .fig-steps>.fig-steps__text>ul.point-list{margin-bottom:0}.card .fig-steps .print-sim-wrapper,.card .fig-steps .interactive-area{box-sizing:border-box;float:none!important;width:100%!important;max-width:none!important;margin-left:0!important;margin-right:0!important}.card .fig-steps .print-sim-wrapper{margin-top:0;margin-bottom:0}@media (width<=759px){.card .fig-steps,.card .fig-steps.fig-steps--mid,.card .fig-steps.fig-steps--left,.card .fig-steps.fig-steps--left.fig-steps--mid{flex-direction:column;gap:14px;display:flex}.card .fig-steps>.fig-steps__fig{order:-1;align-self:stretch;position:static}.card .fig-steps>.fig-steps__text{align-self:stretch}}.ink-writing .card .fig-steps>.fig-steps__fig,section.card.ink-has .fig-steps>.fig-steps__fig{position:static}.card .interactive-area:not([id^=fig-]) .sim-readout{border-bottom:1px solid #94a3b838;padding:7px 10px 6px}.card .interactive-area:not([id^=fig-]){box-shadow:none;background:0 0;border:none;border-radius:12px}.card .interactive-area:hover{border-color:#0000}html.lesson-v2 .card .interactive-area canvas{mix-blend-mode:multiply}.card .interactive-area .sim-readout,#sim-target-area .sim-readout{color:#1e293b;text-align:center;font-variant-numeric:tabular-nums;background:linear-gradient(120deg,#6366f11a,#0ea5e91a);border:none;border-radius:10px;margin:0 0 6px;padding:6px 14px;font-size:.86rem;font-weight:700;line-height:1.5}.card .interactive-area .sim-readout.sim-readout--overlay{margin:0}.card .interactive-area[data-sim-size=m] .sim-readout{padding:5px 10px;font-size:.8rem}.card .interactive-area[data-sim-size=s] .sim-readout{border-radius:8px;padding:4px 8px;font-size:.72rem;line-height:1.45}.card .interactive-area .sim-readout .sm-unit{opacity:.7;font-weight:600}.print-sim-wrapper{flex-direction:column;display:flex}.print-sim-wrapper>.interactive-area{order:1}.print-sim-wrapper>.ann-sim-label{order:2}.print-sim-wrapper>.sim-gallery-link-wrap{order:3}.print-sim-wrapper>.ann-sim-label,.sim-fs-inner>.ann-sim-label{max-width:none;color:var(--text-sub,#64748b);margin:6px auto 0;padding:0;font-size:.8rem;font-weight:700;line-height:1.5}.print-sim-wrapper>.ann-sim-label .sim-fs-btn{box-shadow:none;background:0 0;border-radius:999px;padding:2px 8px;font-size:.72rem}.print-sim-wrapper .sim-gallery-link-wrap{justify-content:center;margin:4px auto 0}.print-sim-wrapper .sim-gallery-link{margin-bottom:0;padding:2px 10px;font-size:.72rem}.ann-sim-label--hasfs .sim-fs-btn{order:1}.ann-sim-label--hasfs .sim-gallery-link{order:2}.ann-sim-label .sim-gallery-link{color:var(--text-main,#334155);background:0 0;border:1px solid #64748b59;border-radius:999px;flex:none;margin:0;padding:2px 8px;font-size:.72rem;font-weight:700;line-height:1.2;transform:none}.ann-sim-label .sim-gallery-link:hover,.ann-sim-label .sim-gallery-link:focus-visible{background:var(--col-main,#0ea5e9);border-color:var(--col-main,#0ea5e9);color:#fff;transform:none}.print-sim-wrapper>.ann-sim-label .sim-fs-btn:hover,.print-sim-wrapper>.ann-sim-label .sim-fs-btn:focus-visible{background:var(--col-main,#0ea5e9);border-color:var(--col-main,#0ea5e9);color:#fff}:is(.print-sim-wrapper:has(>.interactive-area[id^=fig-]) .sim-gallery-link,.sim-fs-inner .sim-gallery-link){display:none}.sim-fs-inner{flex-direction:column;display:flex}.sim-fs-inner>.interactive-area{order:1}.sim-fs-inner>.ann-sim-label{order:2;margin-top:.3em}.card-pager__prev{align-self:center;height:56px;min-height:0;padding:0;line-height:1}.card ol.timeline{margin:18px 0 20px;padding:0 0 0 14px;list-style:none;display:flow-root;position:relative}.card ol.timeline:before{content:"";opacity:.55;background:linear-gradient(#0ea5e9,#6366f1 55%,#a855f7);border-radius:2px;width:3px;position:absolute;top:10px;bottom:10px;left:20px}.card ol.timeline>li{-moz-column-gap:12px;grid-template-columns:auto auto 1fr;align-items:baseline;gap:2px 12px;margin:0;padding:7px 0 7px 30px;display:grid;position:relative}.card ol.timeline>li:before{content:"";box-sizing:border-box;background:#fff;border:3px solid #6366f1;border-radius:50%;width:13px;height:13px;position:absolute;top:14px;left:0;box-shadow:0 0 0 3px #6366f124}.card ol.timeline .tl-year{letter-spacing:.02em;text-align:center;color:#4338ca;font-variant-numeric:tabular-nums;white-space:nowrap;background:#6366f11f;border-radius:999px;justify-self:start;min-width:4.2em;padding:1px 10px;font-size:.86rem;font-weight:800}.card ol.timeline .tl-who{color:var(--text-main);white-space:nowrap;font-weight:800}.card ol.timeline .tl-what{color:var(--text-main);line-height:1.6}@media (width<=520px){.card ol.timeline>li{grid-template-columns:auto 1fr}.card ol.timeline .tl-what{grid-column:1/-1}}.card p.eq{clear:both;white-space:nowrap;flex-wrap:nowrap;justify-content:center;align-items:center;gap:.2em;margin:1em 0;font-size:1.12em;display:flex;overflow:auto hidden}.card p.eq mjx-container{margin:0!important}.card-nav__menu-panel .card-tab__secs{border-left:2px solid #6366f140;flex-wrap:wrap;grid-column:1/-1;gap:4px 6px;margin:0 0 6px 18px;padding:2px 0 2px 10px;display:flex}.card-nav__menu-panel .card-tab__secs[hidden]{display:none}.card-sec{color:var(--text-main);font:inherit;cursor:pointer;text-align:left;background:#6366f112;border:none;border-radius:999px;padding:3px 10px;font-size:.82rem;font-weight:600;line-height:1.5}.card-sec:hover{background:#6366f129}.card-sec mjx-container,.card-toc__chip mjx-container{margin:0!important;font-size:100%!important}.card .ff-clear{clear:both}html.lesson-v2 .card .live-quiz{width:auto}.card .card-toc{border-top:1px dashed #94a3b873;flex-wrap:wrap;align-items:center;gap:6px 8px;margin:16px 0 0;padding-top:12px;display:flex}.card-toc__label{letter-spacing:.06em;color:var(--text-sub,#64748b);margin-right:2px;font-size:.74rem;font-weight:800}.card-toc__chip{color:var(--text-main);font:inherit;cursor:pointer;background:#fff;border:1px solid #6366f147;border-radius:999px;padding:3px 12px;font-size:.84rem;font-weight:700;line-height:1.5;transition:background-color .15s,border-color .15s,transform .15s}.card-toc__chip:hover{background:#6366f11a;border-color:#6366f199;transform:translateY(-1px)}section.card h3,section.card h4{scroll-margin-top:calc(84px + var(--demo-h,0px))}section.card h3.sec-flash{animation:1.5s ease-out secFlash}@keyframes secFlash{0%{background-color:#facc1573}to{background-color:#0000}}@media print{.card-toc{display:none!important}}.card .rv{opacity:0;will-change:auto;transition:opacity .65s cubic-bezier(.16,1,.3,1),transform .65s cubic-bezier(.16,1,.3,1),clip-path .8s cubic-bezier(.16,1,.3,1)}.card .rv.rv-up{transform:translateY(22px)}.card .rv.rv-left{transform:translate(-26px)}.card .rv.rv-right{transform:translate(26px)}@media (width<=759px){.card .rv.rv-left,.card .rv.rv-right{transform:translateY(22px)}}.card .rv.rv-zoom{transform:scale(.95)}.card .rv.rv-pop{transition-timing-function:cubic-bezier(.34,1.4,.64,1);transform:scale(.93)translateY(8px)}.card .rv.rv-wipe{opacity:.001;clip-path:inset(-12px 100% -12px -12px)}.card .rv.reveal-show{opacity:1;transform:none}.card .rv.rv-wipe.reveal-show{clip-path:inset(-12px)}@media (prefers-reduced-motion:reduce){.card .rv{opacity:1!important;clip-path:none!important;transition:none!important;transform:none!important}}@media print{.card .rv{opacity:1!important;clip-path:none!important;transform:none!important}}body.printing .card .rv,body.present-mode .card .rv,body.slide-mode .card .rv,.ink-writing .card .rv,section.card.ink-has .rv{opacity:1!important;clip-path:none!important;transition:none!important;transform:none!important}.card .interactive-area .sim-readout.sim-readout--solid,#sim-target-area .sim-readout.sim-readout--solid{background:linear-gradient(120deg,#eef0fe,#e6f5fd)}@media (width>=561px) and (width<=1000px){.card--split .subpage{padding-inline:max(4vw,58px - 2vw)}}@media (width>=561px) and (width<=767px){section.card:not(.card--split){padding-inline:calc(58px - 2vw)}}@media (width<=560px){.formula-box.compact>div:not(.ann-formula-hit):not(.formula-desc){flex:0 0 100%}.formula-box.compact .formula-desc{flex:0 auto;max-width:100%;padding-left:0}}.sim-math-readout.sim-readout{color:#1e293b;text-align:center;font-variant-numeric:tabular-nums;background:linear-gradient(120deg,#6366f11a,#0ea5e91a);border:none;border-radius:10px;margin:0;padding:6px 14px;font-size:.86rem;font-weight:700;line-height:1.5}.sim-math-readout.sim-readout.sim-readout--solid{background:linear-gradient(120deg,#eef0fe,#e6f5fd)}.card .interactive-area .sim-readout.sim-readout--lead,#sim-target-area .sim-readout.sim-readout--lead,.sim-math-readout.sim-readout.sim-readout--lead{padding:8px 16px;font-size:1.08rem;line-height:1.5}.card .interactive-area[data-sim-size=m] .sim-readout.sim-readout--lead{padding:6px 12px;font-size:.96rem}.card .interactive-area[data-sim-size=s] .sim-readout.sim-readout--lead{padding:5px 9px;font-size:.86rem}.sim-readout .ro-key{font-size:1.1em;font-weight:800}.sim-math-readout.sim-readout .sm-unit{opacity:.7;font-weight:600}@media (width<=560px){.sim-math-readout.sim-readout{border-radius:8px;padding:4px 8px;font-size:.74rem;line-height:1.45}}.card p.eq{justify-content:flex-start}.formula-box>div:has(>.cloze){justify-content:flex-start}.formula-box.compact>div:not(.formula-desc):has(>[data-note=blank]){justify-content:flex-start}.card p.eq:before,.card p.eq:after{content:"";flex:1 1 0;min-width:0;margin:0 -.1em}.formula-box>div:has(>.cloze):before{content:"";flex:1 1 0;min-width:0;margin:0 -.1em}.formula-box>div:has(>.cloze):after{content:"";flex:1 1 0;min-width:0;margin:0 -.1em}.formula-box.compact>div:not(.formula-desc):has(>[data-note=blank]):before{content:"";flex:1 1 0;min-width:0;margin:0 -.1em}.formula-box.compact>div:not(.formula-desc):has(>[data-note=blank]):after{content:"";flex:1 1 0;min-width:0;margin:0 -.1em}.card .interactive-area .sim-readout .sm-unit,.sim-math-readout.sim-readout .sm-unit{opacity:1}@media (width<=560px){#sim-target-area .sim-readout{border-radius:8px;padding:4px 8px;font-size:.74rem;line-height:1.45}}.art-row .art-slot__cap{line-height:1.35}.art-row .art-slot__years{white-space:nowrap;opacity:.85;font-size:.92em}@media (width<=560px){.art-row .art-slot__cap{letter-spacing:-.01em;font-size:.62rem}}@media (width<=767px){table.tbl-wrap{background:#fff;display:table;overflow:hidden}table.tbl-wrap thead th,table.tbl-wrap tbody td{white-space:normal;padding:8px;line-height:1.5}table.tbl-wrap thead th{font-size:.78rem}}.card p.eq-flow{-moz-column-gap:1.1em;flex-wrap:wrap;justify-content:center;align-items:center;gap:0 1.1em;display:flex}.card p.eq-flow.eq-flow--tight{-moz-column-gap:.28em;column-gap:.28em}.card p.eq-flow>mjx-container[display=true]{max-width:100%;margin:.32em 0!important}@media (width<=480px){.card mjx-container[display=true]{font-size:106%!important}:is(.card p.eq,.card .formula-box>div:has(>.cloze),.card .formula-box>div:has(>[data-note=blank])){font-size:.92em}}@media (width<=380px){.card table:not(.tbl-wrap) th,.card table:not(.tbl-wrap) td{padding-left:8px;padding-right:8px}}@media (pointer:coarse){.print-sim-wrapper>.ann-sim-label .sim-fs-btn,.print-sim-wrapper .sim-gallery-link,.sim-tools-row .sim-fs-btn{position:relative;inset:auto}.print-sim-wrapper>.ann-sim-label .sim-fs-btn:after,.print-sim-wrapper .sim-gallery-link:after,.sim-tools-row .sim-fs-btn:after{content:"";position:absolute;inset:-11px -3px -10px}}body.note-mode .art-slot--empty,body[data-classroom-active=true] .art-slot--empty{display:none!important}.ann-sim-label.ann-sim-label--hasfs{text-align:center;display:block}.sim-label-tools{white-space:nowrap;vertical-align:middle;align-items:center;gap:6px;margin-left:.6em;display:inline-flex}.sim-label-tools:empty{display:none}.sim-label-tools .sim-fs-btn{flex:none;position:static;transform:none}.sim-tools-row{order:3;justify-content:center;margin:6px auto 0;line-height:1.5;display:flex}.sim-tools-row .sim-label-tools{margin-left:0}.sim-tools-row .sim-fs-btn,.sim-tools-row .sim-gallery-link{box-shadow:none;color:var(--text-main,#334155);background:0 0;border:1px solid #64748b59;border-radius:999px;margin:0;padding:2px 8px;font-size:.72rem;font-weight:700;line-height:1.2;transform:none}.sim-tools-row .sim-gallery-link{flex:none;order:2}html.pdf-mode .sim-label-tools,html.pdf-mode .sim-tools-row,body.printing .sim-label-tools,body.printing .sim-tools-row{display:none!important}@media print{.sim-label-tools,.sim-tools-row{display:none!important}}@media (pointer:coarse){.interactive-area input[type=range],#sim-target-area input[type=range]{min-height:30px}.interactive-area[data-sim-size]>.sim-ctrl-band .sim-btn{position:relative}.interactive-area[data-sim-size]>.sim-ctrl-band .sim-btn:after{content:"";position:absolute}.interactive-area[data-sim-size=s]>.sim-ctrl-band .sim-btn:after{inset:-5px 0}.interactive-area[data-sim-size=m]>.sim-ctrl-band .sim-btn:after{inset:-3px 0}.interactive-area[data-sim-size=s]>.sim-ctrl-band{row-gap:6px!important}}.sim-fs-stage.sim-fs-stage--fixed{z-index:var(--z-sim-fs);box-sizing:border-box;padding:calc(48px + var(--safe-t,0px)) var(--safe-r,0px) var(--safe-b,0px) var(--safe-l,0px);touch-action:none;overscroll-behavior:contain;background:#fff;justify-content:center;align-items:center;display:flex;position:fixed;inset:0;overflow:hidden}.sim-fs-stage--fixed .sim-fs-inner{opacity:0;flex:none}.sim-fs-stage--fixed.sim-fs-ready .sim-fs-inner{opacity:1;transition:opacity .18s}.sim-fs-stage--fixed .sim-readout{font-size:1.02rem}.sim-fs-close{top:calc(4px + var(--safe-t,0px));right:calc(8px + var(--safe-r,0px));box-sizing:border-box;height:40px;color:var(--text-main,#334155);font:inherit;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;background:#fff;border:1px solid #64748b59;border-radius:999px;padding:0 16px;font-size:14px;font-weight:700;line-height:1;position:absolute}.sim-fs-host{will-change:auto!important;filter:none!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important;perspective:none!important;contain:none!important;z-index:var(--z-sim-fs)!important;transition:none!important;animation:none!important;transform:none!important;container-type:normal!important}html.sim-fs-fixed-on,html.sim-fs-fixed-on body{overflow:hidden!important}html.sim-fs-unavailable .sim-fs-btn{display:none!important}.interactive-area input[type=range],.sim-embed input[type=range],#sim-target-area input[type=range]{accent-color:var(--col-main,#0ea5e9)}