:root{--bg:#f7f5f0;--paper:#fffefa;--ink:#182b39;--muted:#76838b;--line:#e6e8e5;--brand:#267a78;--brand-dark:#135c59;--soft:#e5f2ef;--coral:#d07e62;--red:#ae4a48;--red-bg:#fff0ed;--gold:#e6b96e;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","Microsoft JhengHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}button,select,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.52}a{color:var(--brand)}.app-shell{display:flex;min-height:100vh}.sidebar{background:#19333b;color:#d6e2df;width:258px;min-width:258px;padding:29px 19px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:11px;padding:0 13px 33px}.brand-icon{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:#dbefde;color:#174a46;font-weight:900;letter-spacing:-1.5px}.brand strong{font-size:23px;letter-spacing:-.7px;display:block;line-height:1.05;color:#fff}.brand small{font-size:10px;color:#9bb9b5;letter-spacing:.7px}.sidebar-caption{font-size:10px;letter-spacing:1.5px;color:#89a49f;padding:0 13px 12px;font-weight:800}.nav-item{display:flex;align-items:center;gap:14px;width:100%;border:0;color:#cddcd8;background:none;border-radius:12px;padding:13px 14px;margin:3px 0;text-align:left;font-size:14px}.nav-item b{font-weight:550}.nav-item span{font-size:20px;width:19px;text-align:center;font-weight:400}.nav-item em{font-size:11px;font-style:normal;background:#2e5059;color:#eaf4ef;padding:1px 8px;border-radius:18px;margin-left:auto}.nav-item.active,.nav-item:hover{background:#2a5054;color:#fff}.nav-item.active{box-shadow:inset 3px 0 #77cabc}.side-foot{margin-top:auto;padding:20px 13px 0;font-size:12px;color:#b9ceca;line-height:1.8}.side-foot small{color:#80a09b}.dot{display:inline-block;background:#69c9a4;width:7px;height:7px;border-radius:50%;margin-right:6px}.main-shell{flex:1;min-width:0}.topbar{height:91px;border-bottom:1px solid #e7e7e1;display:flex;align-items:center;justify-content:space-between;padding:18px 40px;background:#faf9f5;gap:12px}.top-title strong{display:block;font-size:16px}.top-title span{font-size:11px;color:var(--muted)}.top-actions{display:flex;gap:8px;align-items:center}.top-actions label{font-size:12px;color:var(--muted)}select{border:1px solid #d9e0dc;background:#fff;border-radius:10px;padding:10px 12px;color:var(--ink);font-size:13px;max-width:170px}.icon-button,.menu-button{border:1px solid #d9e0dc;background:#fff;color:var(--ink);border-radius:10px;padding:7px 12px;font-size:20px}.menu-button{display:none}.site-footer{color:#8c9999;font-size:11px;text-align:center;margin:18px auto 35px;padding:0 20px}#app{max-width:1320px;margin:auto;padding:38px 40px;min-height:70vh}.eyebrow{color:var(--brand);font-size:12px;letter-spacing:1.4px;font-weight:800;text-transform:uppercase}.heading{font-size:31px;line-height:1.2;letter-spacing:-1px;margin:10px 0 6px}.lead{color:var(--muted);margin:0 0 26px;font-size:15px}.hero{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:225px;background:#deede6;border-radius:23px;padding:31px 38px;margin-bottom:27px;position:relative;overflow:hidden}.hero:after{content:"";position:absolute;right:-80px;top:-103px;width:270px;height:270px;background:#c9e6dc;border-radius:50%;opacity:.8}.hero:before{content:"";position:absolute;right:45px;bottom:-155px;width:270px;height:270px;background:#acd5cb;border-radius:50%;opacity:.55}.hero>*{position:relative;z-index:1}.hero h1{font-size:35px;line-height:1.17;margin:9px 0 10px;letter-spacing:-1.2px}.hero p{font-size:14px;color:#56726f;max-width:540px;margin:0 0 17px}.hero-mark{font-size:100px;line-height:1;color:#52998a;font-weight:900;letter-spacing:-11px;padding-right:80px;font-family:Georgia,serif;opacity:.85}.btn{border:1px solid transparent;border-radius:11px;padding:11px 18px;background:#fff;color:var(--ink);font-size:13px;font-weight:750;display:inline-flex;justify-content:center;align-items:center;gap:8px;transition:transform .1s,background .1s;text-decoration:none}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--brand);color:white}.btn-primary:hover{background:var(--brand-dark)}.btn-light{background:#fff;color:#225c59;border-color:#d5e9e0}.btn-subtle{background:#eff3f0;color:#45665f}.btn-danger{background:#fff0ee;color:#a54945}.btn-big{padding:13px 19px}.btn:focus-visible,.choice:focus-visible,.nav-item:focus-visible{outline:3px solid #e7bb64;outline-offset:2px}.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;margin:24px 0 32px}.stat-card,.panel,.exam-card,.category-card,.focus-card,.question-panel,.result-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}.stat-card{padding:20px 22px}.stat-head{display:flex;justify-content:space-between;gap:5px;color:#849490;font-size:12px;font-weight:700}.stat-symbol{color:#86b3ab;background:#edf7f4;padding:3px 9px;border-radius:10px;font-size:16px}.stat-number{font-size:32px;line-height:1.4;font-weight:800;letter-spacing:-1px}.stat-bottom{font-size:11px;color:#8b9795}.section-head{display:flex;justify-content:space-between;align-items:end;gap:8px;margin:28px 0 14px}.section-head h2{margin:0;font-size:19px;letter-spacing:-.3px}.section-head p{margin:4px 0 0;color:var(--muted);font-size:12px}.link-btn{border:0;background:none;color:var(--brand);font-weight:700;font-size:13px;padding:6px}.focus-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.focus-card{padding:21px;text-align:left;display:block;min-height:165px;transition:box-shadow .1s}.focus-card:hover,.exam-card:hover,.category-card:hover{box-shadow:0 7px 25px #2b454810}.focus-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:#ecf5ef;color:#337f75;font-size:21px;margin-bottom:12px}.focus-card h3{margin:0;font-size:16px}.focus-card p{margin:5px 0 0;font-size:12px;color:var(--muted)}.focus-card .arrow{color:var(--brand);font-size:18px;float:right}.split{display:grid;grid-template-columns:1.3fr .7fr;gap:16px;margin-top:18px}.panel{padding:22px}.panel h3{font-size:17px;margin:0 0 13px}.meter{height:8px;background:#eaf0eb;border-radius:9px;overflow:hidden}.meter>div{height:100%;background:#6aac9e;border-radius:9px}.topic-row{display:grid;grid-template-columns:1fr auto;gap:8px;margin:15px 0}.topic-name{font-weight:650;font-size:13px}.topic-meta{font-size:11px;color:var(--muted)}.topic-row .meter{grid-column:1/-1}.pill{display:inline-flex;border-radius:30px;padding:4px 9px;font-size:11px;background:#e5f2ef;color:#27766d;font-weight:700}.pill-warn{background:#fff0ec;color:#a76550}.pill-neutral{background:#edf1f3;color:#677a81}.exam-grid,.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.exam-card,.category-card{padding:21px;transition:box-shadow .1s}.exam-head{display:flex;align-items:center;justify-content:space-between}.exam-no{font-weight:800;font-size:23px}.exam-card h3,.category-card h3{margin:10px 0 3px;font-size:17px}.exam-card p,.category-card p{margin:4px 0 15px;color:var(--muted);font-size:12px}.exam-foot{display:flex;align-items:center;justify-content:space-between;gap:8px}.category-card{cursor:pointer}.category-card h3{margin-top:3px}.category-card .meter{margin:16px 0 8px}.category-card .en{color:#7b9093;font-weight:500;font-size:12px}.empty{background:#fff;padding:35px;text-align:center;border-radius:18px;border:1px dashed #c9d5d1}.empty-icon{font-size:48px;color:#82afa5}.empty h3{margin:8px 0}.empty p{color:var(--muted);font-size:14px}.topic-line{padding:12px 0;border-bottom:1px solid var(--line);display:flex;gap:10px;align-items:center;justify-content:space-between}.topic-line:last-child{border:0}.topic-line strong{font-size:13px}.topic-line small{color:var(--muted);display:block}.topic-line button{white-space:nowrap}.quiz-head{display:flex;gap:15px;justify-content:space-between;align-items:start;margin-bottom:22px}.quiz-head h1{margin:6px 0 4px;font-size:25px}.quiz-sub{color:var(--muted);font-size:13px}.quiz-clock{font-variant-numeric:tabular-nums;font-size:22px;font-weight:800;background:#e8f1ee;color:#296c64;border-radius:12px;padding:8px 18px}.quiz-clock.low{background:#ffe9e6;color:#a23d37}.progress-dots{display:flex;flex-wrap:wrap;gap:5px;margin:16px 0 24px}.progress-dot{background:white;border:1px solid #dfe5e2;border-radius:7px;width:30px;height:30px;font-size:11px;color:#7d8a88;font-weight:700}.progress-dot.done{background:#d9f0e6;color:#257c6d;border-color:#b9dacc}.progress-dot.current{outline:2px solid var(--brand);outline-offset:1px}.question-panel{padding:29px 32px 24px;max-width:900px;margin:0 auto}.q-top{display:flex;align-items:center;justify-content:space-between;color:#82918e;font-size:12px;margin-bottom:19px;gap:12px}.q-english{font-size:23px;line-height:1.4;letter-spacing:-.3px;font-weight:780;margin:4px 0 4px}.q-chinese{font-size:17px;color:#56716f;margin:4px 0 19px}.bilingual.en-only .zhpart{display:none!important}.bilingual.zh-only .enpart{display:none!important}.question-panel.zh-only .q-chinese{font-size:23px;font-weight:800;color:var(--ink)}.answers{display:grid;gap:10px;margin-top:25px}.choice{display:flex;align-items:center;gap:15px;text-align:left;width:100%;background:#fff;border:1.5px solid #e0e6e2;border-radius:13px;padding:14px 16px;min-height:67px;color:var(--ink)}.choice:hover:not(:disabled){border-color:#8abcad;background:#fbfefd}.choice.selected{background:#e8f5ef;border-color:#55a38e}.choice.correct{background:#e3f7e9;border-color:#4c9e78}.choice.incorrect{background:#fff1ef;border-color:#d67770}.choice-mark{border-radius:8px;border:1px solid #d9e5de;min-width:33px;width:33px;height:33px;display:grid;place-items:center;font-size:12px;font-weight:800;background:#f9faf8;color:#657a74}.choice.selected .choice-mark{background:#3b8b7f;color:#fff;border-color:#3b8b7f}.choice strong{display:block;font-size:14px}.choice small{display:block;color:#7c8e8b;font-size:13px;margin-top:2px}.q-help{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:22px}.hint-toggle{border:0;background:none;color:#2b8072;padding:9px 0;font-size:13px;font-weight:750}.hint-box{background:#fff7e9;padding:14px 16px;border-left:3px solid #e4b15e;border-radius:9px;color:#846b45;font-size:14px;margin:9px 0}.feedback{background:#eaf7ef;color:#215e4d;border-radius:12px;padding:17px;margin-top:17px;border:1px solid #cbe5d6}.feedback.bad{background:#fff2ef;border-color:#f1ceca;color:#914e44}.feedback h4{margin:0 0 5px}.feedback p{margin:0 0 3px;font-size:13px}.feedback .zh{font-size:13px;opacity:.87}.q-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:17px auto;max-width:900px;flex-wrap:wrap}.q-bottom .right{display:flex;gap:8px;flex-wrap:wrap}.note-panel{background:#fffefa;border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:20px auto;max-width:900px}.note-panel summary{cursor:pointer;font-size:13px;font-weight:750;color:#53746f}.note-panel textarea{display:block;width:100%;min-height:80px;border:1px solid #dce7df;border-radius:10px;padding:10px;margin:13px 0 9px;resize:vertical;font-size:13px}.note-panel button{margin-left:auto}.result-head{text-align:center;max-width:720px;margin:20px auto 25px}.result-round{font-size:22px;display:inline-grid;place-items:center;width:58px;height:58px;background:#daf2e7;color:#2e8b71;border-radius:50%}.result-head h1{font-size:32px;margin:10px 0 0}.result-score{font-size:53px;font-weight:900;letter-spacing:-2px}.result-score span{font-size:20px;color:#899894}.result-list{max-width:900px;margin:auto;display:grid;gap:10px}.result-card{padding:18px 21px}.result-card .q{font-weight:700}.result-card p{font-size:13px;margin:6px 0;color:#5a7470}.result-card .correct-line{color:#28785c}.result-card .wrong-line{color:#ae514c}.backup-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.detail-box{padding:16px;background:#f0f5f0;border-radius:12px;font-size:13px;color:#536f6b;line-height:1.75}.detail-box code{font-size:12px;background:#e0ebe4;padding:3px 5px}.error-box{background:#fff0ec;color:#b35048;padding:19px;border-radius:12px}.toast{position:fixed;bottom:26px;right:24px;background:#193e3c;color:#fff;padding:12px 18px;border-radius:12px;font-size:13px;box-shadow:0 5px 24px #0002;opacity:0;transform:translateY(12px);transition:.2s;pointer-events:none;z-index:20}.toast.show{opacity:1;transform:translateY(0)}
@media(max-width:1100px){.sidebar{width:215px;min-width:215px}.topbar{padding:15px 24px}#app{padding:28px 24px}.hero-mark{padding-right:0}.stat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.sidebar{position:fixed;top:0;left:0;z-index:8;transform:translateX(-100%);transition:transform .2s;width:265px;min-width:265px}.sidebar.open{transform:translateX(0)}.topbar{height:auto;min-height:74px;flex-wrap:wrap;padding:12px 15px}.menu-button{display:block}.top-title{flex:1}.top-title strong{font-size:13px}.top-actions{width:100%;justify-content:flex-end}.top-actions select{flex:1;min-width:0}.top-actions label{display:none}#app{padding:22px 15px}.hero{padding:25px 20px;min-height:200px}.hero h1{font-size:26px}.hero-mark{display:none}.heading{font-size:25px}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0 22px}.stat-card{padding:14px}.stat-number{font-size:28px}.focus-grid,.split,.exam-grid,.category-grid,.backup-grid{grid-template-columns:1fr}.focus-card{min-height:130px}.question-panel{padding:19px 16px}.q-english{font-size:20px}.q-chinese{font-size:15px}.choice{padding:11px;min-height:64px}.quiz-head h1{font-size:21px}.quiz-clock{font-size:17px}.progress-dot{width:28px;height:28px}.q-bottom .right{justify-content:space-between;width:100%}.q-bottom .right .btn{flex:1}.site-footer{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}