@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;600;700;800&family=Noto+Serif+TC:wght@500;600;700;800&display=swap');
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a{text-decoration:underline}.paper-warning{font-size:10px;color:#8f8466;padding:12px 0}#audio-section{padding:0 0 21px;margin-bottom:18px;border-bottom:1px solid var(--line)}#audio-section label{font-size:11px;display:block;margin-bottom:7px}#audio-section select{max-width:175px;font-size:10px;background:#f7f8f1;border:1px solid var(--line)}audio{width:100%;height:35px}#audio-section small{font-size:9px;color:#9ba68e}dialog{max-width:475px;width:calc(100% - 32px);padding:40px;border:1px solid #d8e3cb;border-radius:18px;text-align:center;color:var(--ink);background:#fffef7;box-shadow:0 30px 100px #1d352a30}dialog::backdrop{background:#183b2b66;backdrop-filter:blur(4px)}.dialog-close{position:absolute;right:16px;top:10px;border:0;background:none;font-size:25px;color:#9ca88e}.result-plant{display:block;font-size:52px;color:#8ca66f;margin-bottom:12px}dialog .eyebrow{justify-content:center}dialog h2{font:700 25px var(--serif);margin:15px 0}dialog p{font-size:12px;color:#8b987e}.result-numbers{display:flex;justify-content:center;gap:45px;padding:22px 0}.result-numbers strong{font:36px Georgia,serif;display:block;color:#50773f}.result-numbers span{font-size:10px;color:#8e9c7f}.dialog-actions{display:flex;justify-content:center;gap:12px;margin-top:25px}
@media(min-width:1450px){.hero{padding-top:80px;padding-bottom:68px}.hero h1{font-size:53px}.subject-board{padding:30px 30px 0}.subject-tile{padding:20px 15px}.hero h1 svg{right:0}}@media(max-width:1050px){.header-inner{padding:0 28px}.local-note{display:none}.hero{gap:35px}.hero h1{font-size:40px}.hero h1 svg{width:32px;right:0}.subject-tile{gap:7px;padding:14px 9px}.subject-tile b{display:none}.subject-board{padding:23px 20px 0}.subject-icon{width:30px}.select-row{gap:13px}.select-row .ready-check{font-size:9px}.stats strong{font-size:25px}.stats>div{gap:7px;padding-left:15px}.exam-grid{gap:14px}.exam-card{padding:18px}.practice-layout{grid-template-columns:minmax(380px,1fr) 310px}.answer-panel{padding:20px}.paper-panel{padding:17px 15px}}@media(max-width:760px){.wrap{padding-left:21px;padding-right:21px}.header{height:auto}.header-inner{padding:17px 21px 0;flex-wrap:wrap;gap:13px}.brand{font-size:20px}.brand-icon{width:36px;height:36px}.brand svg{width:31px}.brand small{font-size:7px}.nav{width:100%;justify-content:space-between;gap:12px;height:41px}.nav a{font-size:11px}.hero{grid-template-columns:1fr;padding-top:35px;padding-bottom:34px;gap:34px}.hero h1{font-size:38px;line-height:1.5;margin-top:14px}.hero h1 svg{left:290px;right:auto;top:14px}.hero-copy>p{font-size:12px}.hero-caption{margin-top:20px;font-size:9px}.subject-board{max-width:480px;transform:none;padding:22px 22px 0}.subject-tile{padding:17px 12px;gap:10px}.subject-tile b{display:block}.subject-board h2{font-size:21px}.stats{grid-template-columns:1fr 1fr 1fr;padding-top:18px;padding-bottom:18px}.stats>div{padding-left:12px;gap:3px;flex-direction:column}.stats>div:nth-child(3){border:0}.stats strong{font-size:25px}.stats>div>span{font-size:9px}.stats .stats-last{display:none}.library{padding-top:35px}.section-heading{align-items:start;flex-direction:column;gap:17px}.section-heading h2{font-size:24px}.search{width:100%}.filters{padding:16px;margin-top:20px}.filter-row{gap:12px}.filter-label{display:none}.chips{gap:4px}.chips button{font-size:10px;padding:6px 10px}.select-row{flex-wrap:wrap;gap:12px}.select-row label{font-size:10px;gap:6px}.select-row select{font-size:10px;padding:6px 14px 6px 7px}.select-row .ready-check{margin-left:0;font-size:10px}.text-button{font-size:10px}.exam-grid{grid-template-columns:1fr 1fr;gap:12px}.exam-card{padding:16px}.exam-card h3{font-size:17px;line-height:1.6;margin-top:14px}.card-info{gap:8px;flex-wrap:wrap;margin-top:16px;font-size:9px}.card-info span+span:before{margin-right:8px}.card-bottom{display:block;margin-top:14px;padding-top:12px}.card-bottom button{display:block;margin-top:8px}.card-status{font-size:8px}.exam-card .exam-secondary{margin-left:0;font-size:8px}.card-grade{font-size:9px}.source-note{font-size:9px}.footer{flex-wrap:wrap;gap:8px;padding-top:21px;padding-bottom:21px}.footer p{order:3;width:100%;margin:0;font-size:9px}.secondary-view{padding-top:37px}.secondary-view h1{font-size:25px}.history-card,.saved-item{padding:16px;flex-wrap:wrap;gap:10px}.history-card h3,.saved-item h3{font-size:13px}.practice-header{height:72px;padding:10px 15px;gap:12px;flex-wrap:nowrap}.practice-header strong{font-size:11px}.practice-header small{font-size:8px}.practice-header .primary-button{padding:8px 10px;font-size:10px}.practice-header>button:first-child{font-size:0}.practice-header>button:first-child:first-letter{font-size:21px}.timer{font-size:9px;margin-left:auto}.practice-layout{display:flex;flex-direction:column;min-height:0}.paper-panel{padding:12px;flex:none}.paper-toolbar{margin-bottom:10px;gap:5px;font-size:9px}.paper-toolbar .text-button{font-size:9px}.paper-toolbar button{padding:4px 8px}.paper-viewport{max-height:62vh;min-height:180px}.paper-image-wrap{max-width:650px}.answer-panel{position:relative;top:auto;max-height:none;overflow:visible;padding:20px 21px 35px;border:0}.session-progress{padding-bottom:16px}.question-heading>span{font-size:22px}#question-hint{margin:10px 0 15px}.choices{grid-template-columns:repeat(4,1fr)}.choices button{padding:10px}.choices button.selected{padding:9px}.check-answer{margin-top:12px;padding:10px}.question-grid{grid-template-columns:repeat(8,1fr)}.transcription{margin-top:20px}.navigator-header{margin-top:22px}.question-nav button{font-size:11px}.paper-warning{padding-bottom:0}dialog{padding:32px 25px}.empty-state{padding:40px 15px}.empty-state strong{font-size:20px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.select-row{flex-wrap:wrap;gap:16px}.select-row .ready-check{margin-left:0}.exam-card h3>span{margin-right:5px}.free-response{grid-column:1/-1;font-size:11px;color:#849378}.free-response textarea{display:block;width:100%;margin-top:7px;border:1px solid #d4dfc7;border-radius:7px;padding:10px;font:13px/1.7 var(--sans);color:var(--ink);background:#fcfdf8;resize:vertical}.explanation-section{padding:17px 0 5px;border-bottom:1px solid var(--line);font-size:11px;color:#657b56;line-height:1.95}.explanation-section h3{font:700 16px var(--serif);color:var(--ink);margin:5px 0 13px}.explanation-section ol{padding-left:20px}.explanation-section li{margin-bottom:10px}.explanation-section small{font-size:9px;color:#a0aa92}.pitfall{background:#f7f3e8;border-radius:6px;padding:10px;color:#9c8864}.pitfall b{display:block;font-size:10px}.transcription pre{max-height:200px}@media(max-width:760px){.exam-card h3>span{display:block}.select-row{gap:12px}.explanation-section{font-size:12px}}

/* User-supplied Sci-Flipper logo; preserve proportions and original colors. */
.sf-logo{width:64px;height:64px;object-fit:contain;flex:none}.sf-footer-logo{width:42px;height:42px;object-fit:contain;vertical-align:middle;margin-right:10px}.brand{gap:13px}@media(max-width:760px){.sf-logo{width:52px;height:52px}.sf-footer-logo{width:36px;height:36px}}

.sf-practice-logo{width:40px;height:40px;object-fit:contain;flex:none}@media(max-width:760px){.sf-practice-logo{width:30px;height:30px}.practice-header{gap:9px}}

/* Hero key visual (Learning Island illustration) */
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hero.hero-visual{display:block;padding-top:28px;padding-bottom:36px}
.hero-art{margin:0;border-radius:22px;overflow:hidden;border:1px solid #dfe5d5;box-shadow:0 10px 30px #2a3f3114;line-height:0;background:#f8f1e1}
.hero-art img{display:block;width:100%;height:auto}
.hero-visual .subject-board{margin:22px auto 0;max-width:1000px;transform:none;padding:22px 26px 0}
.hero-visual .subject-grid{grid-template-columns:repeat(4,1fr)}
@media(max-width:1050px){.hero-visual .subject-grid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.hero.hero-visual{padding-top:14px;padding-bottom:24px}.hero-art{border-radius:14px}.hero-visual .subject-board{margin-top:16px}}
@media(max-width:1050px){.hero-visual .subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.hero-visual .subject-tile{min-width:0}

/* answer reveal & review */
.reveal-answer{width:100%;margin-top:8px}
.feedback .outline-button{margin-top:8px}
.dialog-actions{flex-wrap:wrap}

/* single-question crops */
.paper-crops{max-width:760px;margin:auto}
.paper-crops[hidden],.paper-image-wrap[hidden],#page-nav[hidden],.crop-note[hidden]{display:none}
.paper-crop{width:100%;background-color:#fff;background-repeat:no-repeat;box-shadow:0 3px 20px #2c3c2310}
.paper-crop+.paper-crop{margin-top:10px}
.paper-viewport.zoomed .paper-crops{width:145%;max-width:none}
.crop-note{font-size:11px;color:#7d8a6b;background:#f3f1e4;border-radius:8px;padding:8px 12px;margin:-6px 0 12px}