@font-face{font-family:Anton;src:url('assets/fonts/anton.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:DM;src:url('assets/fonts/dm-sans.woff2') format('woff2');font-weight:100 900;font-display:swap}
:root{--yellow:#fff12d;--blue:#123bfa;--ink:#101110;--paper:#fffefa;--line:#d7d8d0;font-family:DM,Arial,sans-serif;color:var(--ink);background:var(--yellow);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,summary,textarea{touch-action:manipulation}button{color:inherit;cursor:pointer;border:0;background:none}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:4px}button.primary:focus-visible,.tone-blue:focus-visible{outline-color:#111}h1,h2,h3,p{margin:0}h1,h2,h3,.brand{font-family:Anton,Impact,sans-serif;font-weight:400}[hidden]{display:none!important}.shell{min-height:100svh;display:flex;flex-direction:column}.skip{position:fixed;top:-100px;left:16px;z-index:100;background:white;padding:14px}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.site-header{height:80px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:12px 36px;background:var(--paper);gap:20px;border-bottom:1px solid #0001}.brand{font-size:30px;line-height:1;text-decoration:none;letter-spacing:-1px}.brand span{font-family:DM,sans-serif;display:block;font-size:9px;font-weight:700;letter-spacing:1.7px;margin-top:8px}.site-header nav{display:flex;gap:24px}.site-header button{font-size:14px;min-height:44px;padding:5px 0;display:flex;align-items:center;gap:8px}.site-header button:hover{text-decoration:underline;text-underline-offset:5px}.site-header nav span[aria-hidden]{font-size:24px}.eyebrow{font-size:10px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.breadcrumbs{display:flex;align-items:center;gap:12px;padding:16px 36px 0;min-height:44px;font-size:12px;flex-wrap:wrap;max-width:1500px;width:100%;margin:auto}.breadcrumbs a{min-height:30px;display:flex;align-items:center}.breadcrumbs>span[aria-current]{font-weight:750}
.browse-main{width:100%;max-width:1500px;margin:0 auto;padding:28px 36px 36px;flex:1}#topic-title:focus{outline:none}.browse-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}.browse-heading h1{font-size:clamp(44px,4.6vw,70px);line-height:1.12;letter-spacing:-.025em;margin-top:10px}.browse-heading>p{font-size:15px;line-height:1.5;padding-bottom:5px}.interest-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.interest-block{display:flex;flex-direction:column;min-width:0;text-decoration:none;background:var(--paper);border:1px solid #19191618;padding:22px 22px 16px;position:relative;overflow:hidden;transition:box-shadow .16s,transform .16s;isolation:isolate;min-height:300px}.interest-block:hover{box-shadow:5px 5px 0 #111;transform:translate(-2px,-2px)}.interest-block .block-copy{position:relative;z-index:1}.interest-block h2{font-size:clamp(25px,2.3vw,36px);line-height:1.16;letter-spacing:-.01em;max-width:95%;margin-top:7px}.interest-block img{display:block;width:100%;height:175px;object-fit:contain;margin:8px 0 0;flex:1;min-height:0}.block-bottom{display:flex;align-items:end;justify-content:space-between;gap:15px;margin-top:10px}.block-bottom>span:first-child{font-size:12px;line-height:1.5;max-width:280px}.block-arrow{font:25px DM,sans-serif;flex-shrink:0;width:36px;height:36px;border:1px solid currentColor;display:grid;place-items:center}.tone-blue{background:var(--blue);color:white}.tone-yellow{background:#ffdc4b}.area-heading{display:grid;grid-template-columns:1.8fr 1fr;gap:30px;align-items:center;margin-bottom:28px;min-height:190px}.area-heading h1{font-size:clamp(45px,4.6vw,70px);line-height:1.15;letter-spacing:-.02em;margin:12px 0}.area-heading p{font-size:15px;line-height:1.6;max-width:650px}.area-heading>img{width:100%;height:200px;object-fit:contain}.topic-block-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.topic-block{display:grid;grid-template-columns:150px 1fr 34px;gap:22px;align-items:center;background:var(--paper);padding:26px 24px;text-decoration:none;min-height:210px;border:1px solid #1112;transition:box-shadow .16s}.topic-block:hover{box-shadow:5px 5px 0 var(--blue)}.topic-block img{width:100%;height:150px;object-fit:contain}.topic-block h2{font-size:30px;line-height:1.2}.topic-block p{font-size:13px;line-height:1.6;margin:10px 0 12px}.topic-preview{font-size:11px;line-height:1.6;color:#545650;display:block}.back-area{font-size:13px;display:inline-flex;min-height:44px;align-items:center;margin-top:22px}
.topic-reading{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(380px,1fr);gap:55px;align-items:start}.topic-visual{position:sticky;top:24px;min-width:0}.topic-visual h1{font-size:clamp(44px,4.6vw,72px);line-height:1.12;letter-spacing:-.025em;margin:14px 0;white-space:pre-line}.topic-visual>p{font-size:14px;line-height:1.6;max-width:600px}.reading-art{display:block;width:100%;height:auto;max-height:410px;object-fit:contain;margin-top:20px}.question-stack{min-width:0}.question-stack-heading{display:flex;justify-content:space-between;align-items:center;min-height:35px;margin-bottom:12px;gap:12px}.question-block{background:var(--paper);margin-bottom:14px;border:1px solid #15151522}.question-block[open]{box-shadow:5px 5px 0 var(--blue)}.question-block>summary{display:flex;align-items:center;justify-content:space-between;gap:18px;cursor:pointer;padding:22px 24px;list-style:none;min-height:100px}.question-block>summary::-webkit-details-marker{display:none}.question-block>summary small{display:block;text-transform:uppercase;font-size:9px;font-weight:750;letter-spacing:.1em;margin-bottom:8px}.question-block>summary h2{font-family:Anton,Impact,sans-serif;font-size:27px;font-weight:400;line-height:1.2;display:block}.question-plus{font-size:26px;color:var(--blue)}.question-block[open] .question-plus{font-size:0}.question-block[open] .question-plus:after{content:'−';font-size:26px}.question-content{padding:0 24px 20px}.question-answer{font-size:14px;line-height:1.65;color:#44453f}.question-actions{display:flex;flex-direction:column;gap:8px;margin-top:18px}.gotcha{padding:12px 13px;background:#fff7ad;font-size:12px;line-height:1.5;border-left:3px solid #171815}.gotcha strong{display:block;margin-bottom:3px;font-size:9px;letter-spacing:.1em;text-transform:uppercase}.primary{background:var(--blue);color:white;min-height:48px;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;text-align:left;font-size:14px;font-weight:700;gap:12px}.primary:hover{background:#0024d6}.primary[aria-pressed=true]{background:#161714}.text-button{font-size:13px;min-height:44px;text-align:left;text-decoration:underline;text-underline-offset:5px;padding:6px 0}.text-button:hover{color:var(--blue)}.topic-sources{font-size:13px;text-decoration:underline;text-underline-offset:5px;min-height:48px;padding:10px 0;text-align:left}.related{border-top:1px solid #1113;padding-top:25px;margin-top:32px}.related h2{font-size:27px;margin-bottom:15px}.related>div{display:flex;gap:12px;flex-wrap:wrap}.related a{padding:18px 20px;background:var(--paper);display:flex;justify-content:space-between;gap:40px;text-decoration:none;font-size:14px;border:1px solid #1112;flex:1;min-width:180px}.related a:hover{border-color:var(--blue)}.browse-footer{display:flex;align-items:center;gap:24px;padding:14px 36px;background:var(--paper);border-top:1px solid #1112;font-size:11px;min-height:62px}.browse-footer>a{min-height:36px;display:flex;align-items:center}.browse-footer>span{font-size:9px;letter-spacing:.12em;color:#555;margin-left:auto}.browse-footer>button{min-height:36px;font-size:11px;text-decoration:underline;text-underline-offset:4px}.guide-actions{display:flex;gap:24px;border-bottom:1px solid var(--line)}
dialog{border:none;color:var(--ink);background:var(--paper);padding:0;max-width:min(820px,96vw);width:820px;max-height:92dvh;box-shadow:0 18px 100px #0004;overscroll-behavior:contain}dialog::backdrop{background:#1118;backdrop-filter:blur(3px)}.drawer-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;background:var(--paper);border-bottom:1px solid var(--line);padding:26px 32px 22px;position:sticky;top:0;z-index:3}.drawer-header h2{font-size:38px;line-height:1.15;margin-top:9px}.close-button{font-size:30px;width:44px;height:44px;flex-shrink:0;border:1px solid #ddd}.close-button:hover{background:var(--yellow)}#drawer-content{padding:24px 32px 32px}.drawer-intro{font-size:14px;line-height:1.6;color:#565750;margin-bottom:24px}.search-label{font-size:12px;font-weight:750;display:block;margin-bottom:8px}.search-input{width:100%;padding:14px 16px;border:1px solid #8b8c83;background:white;border-radius:0;font-size:16px}.search-input:focus{outline-offset:0}.search-results{margin-top:24px}.result-group{margin:24px 0}.result-group h3,.section-title{font-size:24px;line-height:1.2;margin-bottom:12px}.topic-result{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:15px 0;text-decoration:none;gap:15px;min-height:54px}.topic-result:hover{color:var(--blue)}.topic-result strong{font-size:15px;font-weight:650}.topic-result small{display:block;font-size:12px;color:#666;margin-top:4px}.topic-result>span:last-child{font-size:21px}.faq{border-top:1px solid var(--line)}.faq summary{font-size:14px;font-weight:650;padding:18px 24px 18px 0;cursor:pointer;line-height:1.5}.faq[open] summary{color:var(--blue)}.faq p{font-size:14px;line-height:1.75;margin-bottom:14px}.source-link{font-size:12px;line-height:1.5;display:inline-block;margin-bottom:18px;color:#2836a1}.source-list{list-style:none;padding:0;margin:12px 0 26px}.source-list li{border-top:1px solid var(--line)}.source-list a{display:block;padding:14px 0;text-decoration:none;font-size:14px;line-height:1.5}.source-list a:hover{text-decoration:underline}.source-list small{display:block;font-size:12px;color:#60615b;margin-top:4px}.source-list a:after{content:' ↗';color:var(--blue)}.detail-section{margin-top:28px}.detail-section>p{font-size:14px;line-height:1.7;margin:10px 0}.empty{padding:30px 0 50px}.empty h3{font-size:30px;margin-bottom:14px}.empty p{font-size:15px;line-height:1.65;max-width:520px}.empty button{margin-top:20px}
.calc-grid{display:grid;gap:24px;margin-top:24px}.calc-grid label{font-size:14px;display:block}.calc-grid label>span{display:flex;justify-content:space-between;gap:16px;margin-bottom:12px}.calc-grid output{font-weight:800}.calc-grid input[type=range]{width:100%;accent-color:var(--blue);min-height:30px}.calc-result{padding:24px;background:var(--yellow);margin:28px 0 18px}.calc-result strong{font-family:Anton,sans-serif;font-size:52px;display:block}.calc-result p{font-size:14px;line-height:1.6}.deposit-bar{display:flex;height:48px;background:#d8daf1;margin:20px 0 12px}.deposit-bar span{background:var(--blue);min-width:1px}.legend{display:flex;justify-content:space-between;gap:20px;font-size:13px}.disclaimer{font-size:12px;line-height:1.7;color:#62635c}.toast{position:fixed;bottom:125px;left:50%;transform:translateX(-50%);padding:12px 20px;background:#171815;color:white;z-index:30;font-size:13px;max-width:90vw;text-align:center;box-shadow:0 3px 15px #0003}.no-script{position:fixed;inset:0;padding:40px;background:var(--paper);z-index:50;font-size:20px}.loading-note{padding:30px 0;font-size:15px}

@media(min-width:1051px){.topic-block-grid.count-3{grid-template-columns:repeat(3,minmax(0,1fr))}.count-3 .topic-block{grid-template-columns:1fr;gap:16px;position:relative;align-content:start;padding:24px}.count-3 .topic-block img{height:180px}.count-3 .topic-block .block-arrow{position:absolute;top:20px;right:20px}.count-3 .topic-block h2{font-size:30px}}
@media(min-width:1200px) and (min-height:850px){.interest-block{height:calc((100svh - 360px)/2);min-height:270px;max-height:390px}}
@media(max-width:1050px){.interest-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.interest-block h2{font-size:32px}.topic-block{grid-template-columns:100px 1fr;gap:18px;padding:22px}.topic-block .block-arrow{display:none}.topic-block h2{font-size:25px}.topic-reading{grid-template-columns:minmax(0,1fr) minmax(330px,1fr);gap:30px}.topic-visual h1{font-size:48px}.question-block>summary h2{font-size:25px}.question-block>summary{padding:20px}.question-content{padding:0 20px 20px}}
@media(max-width:740px){.site-header{height:72px;padding:12px 18px;gap:10px}.brand{font-size:24px}.brand span{font-size:7px;letter-spacing:1px}.site-header nav{gap:14px}.site-header button{font-size:12px}.site-header nav span[aria-hidden]{display:none}.breadcrumbs{padding:12px 18px 0;gap:8px;font-size:10px}.browse-main{padding:22px 18px 28px}.browse-heading{display:block;margin-bottom:22px}.browse-heading h1{font-size:42px;margin-top:9px}.browse-heading>p{font-size:13px;margin-top:12px}.browse-heading>p br{display:none}.eyebrow{font-size:9px}.interest-grid{gap:12px}.interest-block{padding:16px 14px 13px;min-height:260px}.interest-block h2{font-size:25px;max-width:100%;line-height:1.18}.interest-block .eyebrow{font-size:7px;letter-spacing:.08em}.interest-block img{height:115px;min-height:85px}.block-bottom{gap:5px}.block-bottom>span:first-child{font-size:10px;line-height:1.45}.block-arrow{font-size:20px;width:27px;height:27px}.area-heading{grid-template-columns:1fr;gap:4px;margin-bottom:20px}.area-heading h1{font-size:42px}.area-heading p{font-size:13px}.area-heading>img{height:170px}.topic-block-grid{grid-template-columns:1fr;gap:12px}.topic-block{grid-template-columns:92px 1fr;min-height:180px;padding:18px;gap:18px}.topic-block img{height:105px}.topic-block h2{font-size:25px}.topic-block p{font-size:12px;margin:8px 0}.topic-preview{font-size:10px}.topic-reading{display:block}.topic-visual{position:static}.topic-visual h1{font-size:42px}.topic-visual>p{font-size:13px}.reading-art{max-height:230px;margin-top:12px}.topic-visual>.back-area{margin-top:8px}.question-stack{margin-top:16px}.question-block>summary{min-height:86px}.question-stack-heading .eyebrow{font-size:8px}.question-stack-heading>.text-button{font-size:11px}.question-content{padding-bottom:18px}.question-block>summary h2{font-size:26px}.related{margin-top:24px}.related a{min-width:100%;font-size:13px}.browse-footer{padding:12px 18px;gap:12px;flex-wrap:wrap}.browse-footer>span{display:none}.browse-footer>a{margin-right:auto}.browse-footer>button{font-size:10px}.drawer-header{padding:20px}.drawer-header h2{font-size:32px}#drawer-content{padding:20px}dialog{max-height:94dvh;max-width:100vw;width:100%;margin:auto 0 0}.drawer-header .eyebrow{font-size:8px}.toast{bottom:20px}}
@media(max-width:360px){.site-header nav{gap:9px}.brand{font-size:21px}.brand span{font-size:6px}.site-header button{font-size:11px}.browse-heading h1{font-size:36px}.interest-block h2{font-size:22px}.interest-block{padding:14px 11px}.block-bottom .block-arrow{display:none}.topic-visual h1{font-size:36px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Language choices keep their native names and remain available on small screens. */
.language-picker{display:flex;align-items:center;position:relative}.language-picker:after{content:'⌄';position:absolute;right:16px;pointer-events:none}.language-picker select{appearance:none;padding:10px 38px 10px 12px;border:1px solid #b6b7ae;border-radius:0;background:var(--paper);font-size:13px;min-height:44px;max-width:145px;color:var(--ink);cursor:pointer}.language-picker select:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.language-notice{padding:9px 36px;border-bottom:1px solid #1112;background:#fff9ae;font-size:12px;line-height:1.5}.reference-notice{padding:12px 15px;border-left:3px solid var(--blue);background:#eeefff;font-size:12px;line-height:1.6;margin:20px 0}.more-reference{margin-top:16px;border:1px solid var(--line);padding:0 14px}.more-reference>summary{padding:16px 0;font-size:14px;cursor:pointer;font-weight:650}.jump-questions{display:none}
:lang(zh-Hans) h1,:lang(zh-Hans) h2,:lang(zh-Hans) h3,:lang(zh-Hans) .question-block>summary h2{font-family:'PingFang SC','Microsoft YaHei',system-ui,sans-serif;font-weight:850;letter-spacing:-.035em;line-height:1.3}:lang(zh-Hans) .eyebrow{letter-spacing:.06em}:lang(zh-Hans) .interest-block h2{font-size:clamp(24px,2.2vw,34px)}:lang(zh-Hans) .topic-visual h1{font-size:clamp(36px,4vw,62px)}
@media(max-width:740px){.site-header{height:auto;min-height:106px;display:grid;grid-template-columns:1fr;padding-bottom:8px;gap:6px}.site-header nav{gap:18px;justify-content:space-between;width:100%}.site-header .brand{justify-self:start}.language-picker{margin-left:auto}.language-picker select{font-size:12px;padding-left:10px;min-width:110px}.language-notice{padding:8px 18px;font-size:11px}.reading-art{max-height:145px;margin:5px 0}.topic-visual>.back-area{display:none}.jump-questions{display:inline-flex;align-items:center;min-height:44px;font-size:13px}.topic-visual h1{font-size:36px}.question-stack{margin-top:8px;scroll-margin-top:12px}.interest-block{min-height:280px}:lang(zh-Hans) .interest-block h2{font-size:24px}}
@media(max-width:740px){.site-header{position:relative}.site-header nav{justify-content:flex-start;gap:22px}.language-picker{position:absolute;right:18px;top:10px}.site-header .brand{max-width:calc(100% - 122px)}.site-header .brand span{line-height:1.3}.interest-block,.question-block,.topic-block{overflow-wrap:anywhere}}
/* Compact custom language menu: bold code, flag on the right. */
.language-picker:after{content:none}.site-header .language-trigger{display:flex;align-items:center;gap:10px;min-width:104px;min-height:44px;padding:8px 12px;border:1px solid #b6b7ae;background:var(--paper);font-size:14px;text-decoration:none}.language-trigger strong{font-weight:800;line-height:1.2;margin-right:auto}.site-header .language-trigger:hover{border-color:var(--ink);text-decoration:none}.language-trigger[aria-expanded=true]{border-color:var(--ink);background:#fff9ae}.site-header nav .language-flag{display:inline-block!important;font:23px/1 'Apple Color Emoji','Segoe UI Emoji',sans-serif;width:27px;text-align:center}.site-header nav .language-chevron{display:inline-block!important;font:16px/1 DM,sans-serif}.language-menu{position:absolute;top:calc(100% + 8px);right:0;width:160px;padding:5px;background:var(--paper);border:1px solid var(--ink);box-shadow:4px 4px 0 var(--ink);z-index:60}.site-header .language-menu button{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px 14px;min-height:48px;font-size:14px;gap:18px;text-decoration:none}.language-menu strong{font-weight:800}.language-menu button[aria-selected=true]{background:var(--blue);color:white}.site-header .language-menu button:hover{background:#fff1a5;color:var(--ink);text-decoration:none}.language-menu button:focus-visible{outline:2px solid var(--ink);outline-offset:-3px}.language-menu button[aria-selected=true]:focus-visible{outline-color:white}.language-trigger:disabled{opacity:.6;cursor:wait}
@media(max-width:740px){.site-header .language-trigger{min-width:104px;font-size:13px}.language-menu{width:150px}.site-header nav .language-flag{font-size:22px}}
/* A geometric chevron centres consistently; the old text glyph had a low baseline. */
.site-header nav .language-chevron{display:grid!important;place-items:center;align-self:center;flex:0 0 14px;width:14px;height:14px;font-size:0;line-height:0}.language-chevron:before{content:'';display:block;width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-2px) rotate(45deg)}.language-trigger[aria-expanded=true] .language-chevron:before{transform:translateY(2px) rotate(225deg)}
.reminder-list{margin:20px 0;padding-top:16px;border-top:1px solid var(--line)}.reminder-list h3{font:750 13px/1.4 DM,Arial,sans-serif;margin-bottom:10px}.reminder-list ul{margin:0;padding-left:18px;display:grid;gap:9px;font-size:14px;line-height:1.45}.reminder-list>p{font-size:12px;line-height:1.6;color:#62635c;margin:12px 0 18px}.question-stack>.text-button{display:block}.question-stack-heading .text-button{font-weight:700}

/* Explanations use clear contrasts and small reading blocks, not task completion. */
.learning-points{margin:22px 0}.learning-points h3{font:750 12px/1.4 DM,Arial,sans-serif;text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}.learning-points ul{padding:0;margin:0;list-style:none;display:grid;gap:0}.learning-points li{display:flex;gap:14px;padding:12px 0;border-top:1px solid var(--line);align-items:flex-start}.learning-points li>span{width:6px;height:6px;flex:0 0 6px;margin-top:8px;background:var(--blue);border-radius:50%}.learning-points li>p{font-size:14px;line-height:1.55}
.faq>summary{font-size:17px;font-weight:700;padding:20px 0;min-height:56px}.faq-answer{padding:0 0 22px}.answer-blocks{margin:16px 0 22px;max-width:65ch}.answer-blocks p{margin:0;line-height:1.65;font-size:15px;white-space:normal}.answer-blocks .answer-lead{font-size:18px;font-weight:650;line-height:1.5;margin-bottom:18px}.answer-blocks .answer-support{padding:12px 0 12px 17px;border-left:2px solid #d9dcf6}.answer-blocks .answer-support+.answer-support{margin-top:4px}.answer-tools{display:flex;gap:14px 24px;justify-content:space-between;align-items:center;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:12px}.answer-tools .source-link{margin:0;max-width:65%}
.detail-overview{display:grid;grid-template-columns:220px minmax(0,1fr);gap:24px;align-items:center}.detail-overview>img{width:100%;height:auto}.detail-overview .answer-blocks{margin:0}.empty>svg{color:var(--blue);margin-bottom:20px}
@media(max-width:740px){.answer-diagram{padding:18px 16px}.answer-diagram figcaption{font-size:24px}.compare .diagram-items{gap:16px}.diagram-item strong{font-size:15px}.faq .diagram-item p{font-size:13px}.diagram-item>svg{width:40px;height:40px}.answer-blocks .answer-lead{font-size:17px}.answer-blocks p{font-size:15px}.detail-overview{grid-template-columns:1fr;gap:12px}.detail-overview>img{height:175px;object-fit:contain}.answer-tools .source-link{max-width:100%}.faq>summary{font-size:16px}.sequence .diagram-item{gap:14px}}
.full-explanation{margin:-6px 0 18px}.full-explanation>summary{font-size:13px;font-weight:650;padding:10px 0;min-height:44px}.full-explanation .answer-blocks{margin:8px 0 20px}

/* Photographic answer stories: scene first, short caption, full wording underneath. */
.collage-answer{container-type:inline-size;margin:0 0 20px;padding:0;background:transparent;overflow-wrap:break-word}
.collage-answer figcaption{font:400 28px/1.2 Anton,Impact,sans-serif;max-width:30ch;margin:0 0 18px;letter-spacing:-.015em}
.collage-answer .diagram-items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 20px}
.collage-answer .diagram-item{display:block;min-width:0;padding:0;border:0;position:relative}
.collage-frame{position:relative;aspect-ratio:3/2;margin-bottom:12px;background:#fff7be}
.collage-frame img{display:block;width:100%;height:100%;object-fit:contain}
.collage-answer .diagram-item:nth-child(2n) .collage-frame{background:#edf0ff}
.collage-answer .scene-caption strong{display:block;font:800 16px/1.35 DM,sans-serif;margin:0 0 6px}
.collage-answer .scene-caption p{font:400 14px/1.5 DM,sans-serif;margin:0}
.collage-answer .diagram-note{margin:18px 0 0;padding:12px 14px;border:0;border-left:3px solid var(--blue);background:#fff7be;font:600 13px/1.55 DM,sans-serif}
.scene-number{position:absolute;left:8px;top:8px;display:grid;place-items:center;width:26px;height:26px;background:var(--blue);color:white;font:800 13px/1 DM,sans-serif}
.collage-answer.count-3 .diagram-item:last-child{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}
.collage-answer.count-3 .diagram-item:last-child .collage-frame{margin-bottom:0}
.card-explanation .collage-answer figcaption{font-size:24px}
.card-full{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 0 18px}
.card-full>summary{font-weight:700;color:var(--blue)}
.card-full .learning-points>h3{display:none}
:lang(zh-Hans) .collage-answer figcaption{font-family:'PingFang SC','Microsoft YaHei',system-ui,sans-serif;font-weight:800;font-size:24px}
@container (min-width:600px){.collage-answer.count-3 .diagram-items{grid-template-columns:repeat(3,minmax(0,1fr))}.collage-answer.count-3 .diagram-item:last-child{grid-column:auto;display:block}.collage-answer.count-3 .diagram-item:last-child .collage-frame{margin-bottom:12px}}
@media(max-width:740px){.collage-answer figcaption{font-size:25px}.collage-answer .diagram-items{gap:20px 14px}.collage-answer .scene-caption strong{font-size:15px}.collage-answer .scene-caption p{font-size:13px}.scene-number{left:5px;top:5px;width:22px;height:22px;font-size:12px}.collage-answer .diagram-note{font-size:13px}}
@media(max-width:360px){.collage-answer .diagram-items{grid-template-columns:1fr}.collage-answer .collage-frame{max-height:175px;aspect-ratio:3/2}.collage-answer .diagram-item{display:grid;grid-template-columns:1fr;gap:0}.collage-answer.count-3 .diagram-item:last-child{display:block}.collage-answer.count-3 .diagram-item:last-child .collage-frame{margin-bottom:12px}.collage-answer .scene-caption p{font-size:14px}}

#drawer-content>.detail-section:first-child{margin-top:0}

/* Each answer-specific sheet contains independent scenes in a 2 × 2 grid.
   Cropping is presentation only: one compressed request serves the whole answer. */
.collage-frame{overflow:hidden}
.collage-sprite img{position:absolute;max-width:none;width:calc(100% * var(--scene-columns));height:calc(100% * var(--scene-rows));left:calc(-100% * var(--scene-x));top:calc(-100% * var(--scene-y));object-fit:fill}
@media(max-width:360px){.collage-answer .collage-sprite{max-height:none}}

/* Avoid flashing the footer before the first routed page is ready. */
body[data-loading] .browse-footer{visibility:hidden}