:root{font-family:Noto Sans SC,-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;color:#293b35;background:#f7f8f5;font-synthesis:none;font-weight:400;font-size:14px}*{box-sizing:border-box}body{margin:0}button,a,input,select{-webkit-tap-highlight-color:transparent}button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button{color:inherit}button:disabled{cursor:default;opacity:.5}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #a6bd73;outline-offset:4px}button{transition:background .18s,border-color .18s,transform .18s}button:hover:not(:disabled){filter:brightness(.98)}.app-shell{display:flex;min-height:100vh}.sidebar{width:226px;padding:37px 21px 24px;background:#fff;border-right:1px solid #e8ebe4;position:fixed;inset:0 auto 0 0;display:flex;flex-direction:column;z-index:10}.brand{display:flex;gap:11px;align-items:center;font-size:22px;letter-spacing:1px;font-weight:650;padding:0 9px}.brand-mark{background:#285544;color:#fff;border-radius:11px;width:40px;height:43px;display:grid;place-items:center}.brand small{display:block;font-size:8px;letter-spacing:1.5px;color:#8c9690;margin-top:3px}.sidebar-label{margin:51px 14px 15px;font-size:10px;color:#a0a69f;letter-spacing:2px}.nav-item{display:flex;align-items:center;gap:13px;border:0;background:transparent;width:100%;padding:14px 17px;margin-bottom:8px;border-radius:7px;color:#7c857e;font-size:13px;text-align:left}.nav-item.current{background:#eaf1e8;color:#315b43;font-weight:600}.nav-dot{width:5px;height:5px;border-radius:50%;background:#426b4b;margin-left:auto}.nav-item b{font-size:10px;background:#f1e8db;padding:2px 7px;border-radius:5px;margin-left:auto}.sidebar-note{margin-top:auto;padding:37px 18px 35px;color:#647061;position:relative;overflow:hidden}.note-symbol{font-family:Georgia,serif;color:#bdc9ab;font-size:55px;line-height:30px}.sidebar-note p{font-family:Georgia,Songti SC,serif;line-height:2;font-size:18px;letter-spacing:3px;margin:7px 0 13px}.sidebar-note small{font-size:9px;color:#9ba18f}.note-lines{position:absolute;width:100px;height:100px;bottom:12px;right:-50px;border:1px solid #e7eadd;border-radius:50%;box-shadow:0 0 0 12px #f5f6f1,0 0 0 13px #eceee3;z-index:-1}.sidebar-bottom{border-top:1px solid #edf0e9;padding:22px 8px 0;color:#7e887b;font-size:10px;letter-spacing:1px}.sidebar-bottom small{display:block;font-size:9px;margin:10px 0 0 15px;color:#aab0a6}.mini-dot,.status-dot{width:6px;height:6px;background:#7d9776;display:inline-block;border-radius:50%;margin-right:8px}.workspace{margin-left:226px;width:calc(100% - 226px)}.topbar{height:77px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e6e9e1;padding:0 44px;background:#fdfdfa;font-size:11px;color:#90988c}.header-slash{margin:0 16px;color:#c3c9bd}.topbar b{font-weight:450;color:#525e51}.topbar-right{display:flex;align-items:center;font-size:10px}.avatar{margin-left:23px;display:grid;place-items:center;width:32px;height:32px;background:#e9eddf;border:3px solid white;border-radius:50%;color:#5e7156;font-size:12px}main{padding:38px 44px 0;max-width:1530px;margin:auto}.page-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 28px;gap:15px}.eyebrow{font-size:9px;letter-spacing:2px;color:#929d83;margin-bottom:12px;font-weight:550}h1{font-size:25px;font-weight:600;letter-spacing:.5px;margin:0 0 10px;line-height:1.55}.page-heading h1 span{color:#7d9669}.page-heading p,.section-heading p{font-size:11px;color:#93998d;margin:0;line-height:1.8}.edition{border:1px solid #e2e5d9;border-radius:5px;padding:7px 10px;display:flex;align-items:center;gap:10px;color:#828d73;font-size:10px;white-space:nowrap}.hero{background:#285346;min-height:237px;border-radius:10px;position:relative;overflow:hidden;color:#fff;display:flex;justify-content:space-between;padding:28px 34px}.hero-copy{z-index:1}.hero-tag{display:inline-flex;gap:7px;align-items:center;font-size:9px;letter-spacing:2px;color:#d7e1ce;background:#ffffff0c;padding:5px 9px;border:1px solid #ffffff15;border-radius:3px}.hero-tag span{height:4px;width:4px;border-radius:50%;background:#bacf9b}.hero h2{font-size:28px;letter-spacing:2px;font-weight:500;margin:16px 0 10px}.hero p{font-size:11px;line-height:1.9;color:#bdcdc2;margin:0 0 18px;letter-spacing:.4px}.hero a{font-size:11px;color:#e4eccf;display:flex;gap:21px;align-items:center}.hero-art{width:290px;min-width:220px;position:relative;margin:-28px -10px -28px 0}.orbit{width:290px;height:290px;border:1px solid #a0b98b23;border-radius:50%;position:absolute;top:-27px;right:-20px}.orbit-two{width:210px;height:210px;top:12px;right:20px}.book{position:absolute;width:119px;height:158px;border-radius:4px 12px 12px 4px;top:41px;right:73px;transform:rotate(-13deg)}.book-back{background:#75907a;transform:rotate(8deg);right:51px;top:49px;border:1px solid #a9b6a0}.book-front{background:linear-gradient(110deg,#e8e5cb,#c9d2ae);color:#4c6850;box-shadow:9px 14px 20px #153b3a70,inset 7px 0 #a8b997,inset 9px 0 #e7e8cc;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid #edebd0}.book-front span{font-family:Songti SC,serif;font-size:10px;letter-spacing:3px;margin-top:13px}.leaf-art{position:absolute;right:9px;bottom:26px;color:#9ab28c;transform:rotate(23deg)}.art-star{position:absolute;right:28px;top:37px;font-size:21px;color:#c9cfa8}.art-dots{position:absolute;left:30px;bottom:44px;font-size:27px;color:#8aa98b}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:17px;margin:23px 0 35px}.stat{border:1px solid #e4e7df;background:#fff;border-radius:8px;padding:18px 20px 16px}.stat-label{display:flex;justify-content:space-between;font-size:11px;color:#868f81;align-items:center}.stat-label svg{color:#99a38e}.stat-value{font-size:31px;font-family:Arial,sans-serif;font-weight:500;margin:12px 0 9px;line-height:1}.stat-value small{font-size:11px;color:#92998b;margin-left:7px;font-weight:400}.stat p{font-size:9px;margin:0;color:#a3a99c}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.section-heading h2{font-size:18px;margin:0 0 7px;font-weight:550;letter-spacing:.3px}.section-heading>span{font-size:10px;color:#a2aa99;letter-spacing:2px;font-family:monospace}.mode-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.mode-card{position:relative;border:1px solid #e3e7dd;background:#fff;padding:20px 19px 16px;border-radius:8px;text-align:left}.mode-card.chosen{border:1.5px solid #57744d;background:#f3f6ed;box-shadow:0 3px 9px #41533805;padding:19.5px 18.5px 15.5px}.mode-icon{width:44px;height:44px;border-radius:10px;display:grid;place-items:center}.green{color:#62815e;background:#eaf0e4}.orange{color:#b18c5a;background:#f8efe1}.purple{color:#9181ab;background:#efebf6}.blue{color:#6c8c9c;background:#eaf0f3}.radio{width:15px;height:15px;border:1px solid #d8dfd0;border-radius:50%;position:absolute;right:17px;top:21px;display:grid;place-items:center}.chosen .radio{border-color:#628150}.radio span{width:7px;height:7px;background:#628150;border-radius:50%}.mode-card h3{font-size:14px;font-weight:550;margin:18px 0 8px}.mode-card p{font-size:9px;color:#959d8d;line-height:1.9;white-space:nowrap;margin:0 0 20px}.mode-count{font-size:9px;color:#89927e;display:flex;align-items:center;gap:4px}.mode-count strong{font-size:12px;color:#636e5b;font-weight:500}.mode-count svg{margin-left:auto;color:#a8b19c}.start-panel{border:1px solid #e3e7dc;background:#fff;border-radius:8px;padding:20px 23px;margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.start-description{display:flex;gap:14px;align-items:center}.start-icon{background:#f1f3e9;color:#9aa87f;border-radius:50%;width:39px;height:39px;display:grid;place-items:center}.start-description b{font-size:12px;font-weight:550}.start-description p{font-size:9px;color:#979f8e;margin:7px 0 0}.primary,.secondary{border-radius:5px;padding:12px 22px;display:inline-flex;gap:17px;align-items:center;justify-content:center;font-size:11px;font-weight:500;white-space:nowrap}.primary{border:1px solid #315748;background:#315748;color:#fff}.primary:hover{background:#214636}.secondary{background:#fff;border:1px solid #dce2d6;color:#5e7159}.counts{display:flex;align-items:center;gap:12px;font-size:11px}.counts input{width:65px;border:1px solid #d8e1cf;border-radius:4px;padding:8px;margin:0 5px;background:#fafbf7;color:#35563e}.tip{display:flex;gap:9px;align-items:center;margin:23px 0 0;color:#969f88;font-size:9px}.tip>span{font-weight:500;color:#7e8c6c}.tip p{margin:0}.resume{display:flex;justify-content:space-between;align-items:center;border:1px solid #d6e3c9;background:#eff4e7;border-radius:7px;padding:14px 20px;margin:-10px 0 25px;font-size:12px}.resume>div{display:flex;gap:10px;align-items:center}.resume small{margin-left:12px;color:#879378}.resume button{border:0;background:transparent;display:flex;align-items:center;gap:10px;font-size:12px}footer{display:flex;justify-content:space-between;border-top:1px solid #e2e6db;color:#a2aa98;margin-top:39px;padding:22px 0 24px;font-size:9px;gap:15px}footer>span{display:flex;gap:7px;align-items:center}footer i{height:9px;border-left:1px solid #d8dece;margin:0 4px}.error-text{color:#b54f46;font-size:12px}.quiz-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;color:#89977d;font-size:11px}.back{background:transparent;border:0;display:flex;align-items:center;gap:5px;color:#607755;padding:4px 0}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:22px;align-items:start}.question-card,.answer-sheet{border:1px solid #e2e7db;border-radius:10px;background:#fff;padding:30px}.question-meta{display:flex;justify-content:space-between;align-items:center;color:#8d9686;font-size:11px}.type-tag{background:#ecf2e6;color:#5d7b50;padding:6px 10px;border-radius:4px;font-size:11px}.progress{height:3px;background:#edf0e7;border-radius:3px;margin:20px 0 29px;overflow:hidden}.progress>div{background:#779361;height:100%;transition:width .3s}.question-stem{font-size:19px;line-height:1.9;font-weight:550;letter-spacing:0}.question-hint{color:#99a18e;font-size:11px;margin:10px 0 25px}.options{display:flex;flex-direction:column;gap:12px}.option{display:flex;align-items:center;gap:13px;padding:16px;border:1px solid #e1e6da;border-radius:6px;background:#fff;text-align:left;font-size:13px;line-height:1.9;width:100%;opacity:1!important}.option-key{display:grid;place-items:center;border:1px solid #dce3d4;border-radius:50%;width:30px;height:30px;min-width:30px;font-family:Arial,sans-serif;font-size:12px;color:#89977b}.option-key.square{border-radius:5px}.option>svg{margin-left:auto;flex-shrink:0}.option.selected{border-color:#789664;background:#f3f7ed}.option.selected .option-key{color:#fff;background:#6b8a58;border-color:#6b8a58}.option.correct{border-color:#6b9c75;background:#f0f7ee;color:#3e7650}.option.incorrect{border-color:#cf8c7c;background:#fff4ef;color:#a9513f}.option.incorrect .option-key{background:#bd6c58;border-color:#bd6c58}.question-actions{display:flex;justify-content:space-between;margin-top:28px;border-top:1px solid #edf0e7;padding-top:22px}.feedback{border-radius:6px;padding:18px 20px;margin-top:22px;font-size:12px;line-height:1.9}.feedback>div{display:flex;gap:8px;align-items:center}.feedback p{margin:9px 0}.feedback p span{margin-left:20px}.feedback small{opacity:.8;font-size:10px}.feedback ul{padding-left:18px;margin:7px 0 12px}.success{background:#eff6ec;color:#4e7b49}.failure{background:#fcf1e9;color:#a56443}.answer-sheet{padding:21px 19px}.answer-sheet h3{font-size:13px;font-weight:550;display:flex;justify-content:space-between;margin:0 0 20px}.answer-sheet h3 span{font-weight:400;color:#9ba38f;font-size:11px}.sheet-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;max-height:480px;overflow:auto;padding:2px}.sheet-grid button{aspect-ratio:1;border:1px solid #e4e9dd;background:#f9faf6;border-radius:4px;font-size:10px;color:#99a08f}.sheet-grid .right,.sheet-legend .right{background:#e4efdf;color:#547b48;border-color:#cadcbe}.sheet-grid .wrong,.sheet-legend .wrong{background:#fbe9e0;color:#ac6c4e;border-color:#edc6b6}.sheet-grid .present{outline:2px solid #5c7c4c;outline-offset:1px}.sheet-legend{display:flex;justify-content:space-between;font-size:9px;color:#96a087;border-top:1px solid #e7ecdf;margin-top:20px;padding-top:16px}.sheet-legend span{display:flex;align-items:center;gap:4px}.sheet-legend i{width:8px;height:8px;background:#f5f7f0;border:1px solid #dbe3d0;border-radius:2px}.answer-sheet>p{font-size:10px;line-height:1.9;color:#9fa893;margin-top:18px}.answer-sheet>.primary{width:100%;margin-top:10px}.result-card{background:#fff;border:1px solid #e0e7d6;border-radius:12px;text-align:center;max-width:740px;margin:25px auto;padding:55px 35px}.result-icon{background:#edf4e5;border-radius:50%;width:80px;height:80px;color:#709554;display:grid;place-items:center;margin:0 auto 24px}.result-card h1{font-size:24px}.result-card>p{color:#9da78e;font-size:12px}.score{font-size:75px;line-height:1;font-weight:550;color:#4b7040;margin:35px 0 26px;font-family:Arial,sans-serif}.score span{font-family:inherit;font-size:13px;margin-left:8px;color:#99a68b}.result-numbers{display:flex;gap:35px;justify-content:center;font-size:12px;color:#8e9b7c}.result-numbers b{color:#516b43;font-size:20px;margin-left:8px}.result-actions{display:flex;gap:12px;justify-content:center;margin-top:35px}.library-toolbar{display:flex;gap:15px;align-items:center;margin-bottom:22px}.library-toolbar input,.library-toolbar select{border:1px solid #dfe6d6;border-radius:5px;padding:12px 15px;background:#fff;color:#617453;font-size:12px}.library-toolbar input{flex:1}.library-toolbar>span{font-size:11px;color:#9ca58f}.library-list details{background:#fff;border:1px solid #e2e8da;border-radius:7px;margin-bottom:12px}.library-list summary{display:flex;align-items:center;gap:17px;list-style:none;cursor:pointer;padding:22px;font-size:13px;line-height:1.9}.library-list summary::-webkit-details-marker{display:none}.question-number{font-family:monospace;color:#a3af94;font-size:12px}.library-list summary>span:nth-child(2){flex:1}.list-type{font-size:9px;color:#829572;background:#eef3e8;border-radius:3px;padding:3px 6px;margin-right:10px;white-space:nowrap}.library-list details[open] summary>svg{transform:rotate(90deg)}.detail-body{border-top:1px solid #eaf0e1;padding:12px 22px 20px 62px;font-size:12px;line-height:1.9;color:#8a967e}.detail-body p{display:flex;gap:8px;align-items:center}.answer-text{color:#568144}.detail-answer{background:#f2f6eb;padding:10px 15px;border-radius:4px;color:#5d7e4c;margin-top:16px}.detail-answer small{color:#9aa88a;margin-left:15px}.empty{text-align:center;background:#fff;border:1px solid #e3e9dc;border-radius:9px;padding:65px 20px;color:#99a98a}.empty>svg{margin-bottom:12px}.empty h3{font-size:18px;color:#617953;font-weight:500}.empty p{font-size:12px;margin-bottom:25px}.history-list article{display:flex;align-items:center;gap:18px;padding:23px;background:#fff;border:1px solid #e1e7d8;border-radius:8px;margin-bottom:13px}.history-list h3{font-size:14px;margin:0 0 8px;font-weight:500}.history-list p{font-size:10px;color:#99a58c;margin:0}.history-score{margin-left:auto;text-align:right}.history-score b{font-size:24px;font-weight:500;color:#597b48}.history-score small{display:block;color:#9ba88e;font-size:10px;margin-top:4px}@media(min-width:1500px){main{padding-top:45px}.hero{min-height:260px}.mode-card{padding:25px}.mode-card.chosen{padding:24.5px}.mode-card p{font-size:11px}.stats{margin-bottom:40px}.hero-art{margin-right:30px}.hero-copy{padding:7px 0}.hero h2{font-size:31px}}@media(max-width:1180px){.sidebar{width:196px;padding-left:12px;padding-right:12px}.workspace{margin-left:196px;width:calc(100% - 196px)}main{padding:30px 28px 0}.topbar{padding:0 28px}.brand{font-size:20px}.mode-card{padding:17px 12px}.mode-card.chosen{padding:16.5px 11.5px}.mode-card p{font-size:9px;white-space:normal;min-height:34px;margin-bottom:12px}.mode-grid{gap:12px}.stat{padding:17px 15px}.stats{gap:12px}.quiz-layout{grid-template-columns:minmax(0,1fr) 200px;gap:15px}.question-card{padding:24px}.start-description p{max-width:340px;line-height:1.7}.page-heading h1{font-size:23px}.hero-art{width:220px}.hero{padding:28px}.hero h2{font-size:25px}}@media(max-width:900px){.sidebar{width:80px;padding:27px 12px}.brand{padding:0;justify-content:center}.brand>span:last-child,.sidebar-label,.nav-item>span,.nav-item b,.sidebar-note,.sidebar-bottom{display:none}.nav-item{justify-content:center;padding:15px 0}.sidebar nav{margin-top:45px}.workspace{margin-left:80px;width:calc(100% - 80px)}.quiz-layout{grid-template-columns:1fr}.answer-sheet .sheet-grid{grid-template-columns:repeat(12,1fr);max-height:200px}.answer-sheet>p{display:none}.sheet-legend{justify-content:start;gap:20px}.hero-art{min-width:170px;width:170px;transform:scale(.8);transform-origin:right center}.hero-copy{min-width:330px}.start-panel{padding:18px}.start-icon{display:none}.counts{gap:6px}.counts input{width:54px}.start-description{gap:10px}.edition{display:none}}@media(max-width:767px){.sidebar{inset:auto 0 0;width:100%;height:66px;padding:4px 8px;border-right:0;border-top:1px solid #e2e8d9;background:#fff;display:block}.brand{display:none}.sidebar nav{display:grid;grid-template-columns:repeat(4,1fr);margin:0;height:100%}.nav-item{flex-direction:column;gap:5px;margin:0;padding:8px 3px;border-radius:5px;font-size:10px}.nav-item>span:first-of-type{display:block}.nav-item .nav-dot{display:none}.nav-item svg{width:18px;height:18px}.workspace{margin:0;width:100%;padding-bottom:66px}.topbar{height:58px;padding:0 20px;font-size:10px}.topbar-right{font-size:9px}.avatar{margin-left:12px;width:28px;height:28px}.header-slash{margin:0 9px}main{padding:27px 19px 0}.eyebrow{font-size:8px}.page-heading{margin-bottom:22px;align-items:flex-start;flex-direction:column}.page-heading h1{font-size:21px}.page-heading p{font-size:10px}.hero{padding:25px 23px;min-height:229px}.hero-copy{min-width:0}.hero h2{font-size:22px;letter-spacing:1px;margin-top:19px}.hero p{font-size:10px}.hero-art{display:none}.hero-tag{font-size:8px}.stats{grid-template-columns:repeat(2,1fr);gap:11px;margin:17px 0 29px}.stat{padding:16px}.stat p{font-size:8px}.stat-value{font-size:30px}.section-heading h2{font-size:17px}.section-heading p{font-size:10px}.mode-grid{grid-template-columns:repeat(2,1fr);gap:12px}.mode-card{padding:19px 17px}.mode-card.chosen{padding:18.5px 16.5px}.mode-card p{font-size:9px;min-height:18px}.mode-card h3{margin-top:14px}.mode-count{font-size:10px}.start-panel{flex-direction:column;align-items:stretch;gap:18px;padding:19px}.start-panel .primary{width:100%}.start-description p{font-size:10px;line-height:1.9}.start-description{flex-wrap:wrap}.counts{gap:8px}.counts input{width:57px}.tip{align-items:flex-start;flex-wrap:wrap;gap:6px;margin-top:20px}.tip p{line-height:1.8;max-width:80%}footer{margin-top:27px;padding:18px 0;flex-direction:column;gap:10px;font-size:8px}.resume{padding:15px;gap:8px}.resume>div>svg{display:none}.resume span{font-size:11px}.resume small{display:block;margin:6px 0 0;font-size:9px}.resume button{font-size:10px;gap:5px}.quiz-heading>span{font-size:9px}.question-card{padding:22px 18px}.question-stem{font-size:17px}.option{font-size:12px;padding:13px;gap:10px}.option-key{width:27px;height:27px;min-width:27px}.question-actions .primary,.question-actions .secondary{padding:12px 15px;font-size:10px;gap:7px}.feedback{padding:16px;font-size:11px}.feedback p span{display:block;margin:5px 0 0}.answer-sheet .sheet-grid{grid-template-columns:repeat(8,1fr)}.result-card{padding:35px 20px;margin:10px auto}.result-card h1{font-size:20px}.score{font-size:65px}.result-actions{flex-direction:column}.library-toolbar{gap:8px;flex-wrap:wrap}.library-toolbar input{min-width:0;width:60%;padding:11px}.library-toolbar select{padding:11px 6px}.library-toolbar>span{font-size:10px;width:100%}.library-list summary{padding:17px 14px;gap:10px;font-size:12px}.question-number{font-size:10px}.detail-body{padding:10px 17px 17px;font-size:11px}.detail-answer small{display:block;margin:3px 0 0}.history-list article{flex-wrap:wrap;gap:13px;padding:18px 15px}.history-list p{font-size:9px}.history-list .secondary{margin-left:auto;padding:8px 12px}.history-list .mode-icon{width:35px;height:35px}.history-score b{font-size:21px}.history-score small{font-size:9px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}html{-webkit-text-size-adjust:100%;scroll-padding-bottom:160px}.workspace,main,.question-card,.start-description,.hero-copy{min-width:0}.question-stem,.option>span:nth-child(2),.library-list summary,.feedback{overflow-wrap:anywhere}@media(max-width:767px){:root{font-size:16px}.app-shell{min-height:100dvh}.sidebar{height:calc(66px + env(safe-area-inset-bottom,0px));padding-bottom:calc(4px + env(safe-area-inset-bottom,0px))}.workspace{padding-bottom:calc(66px + env(safe-area-inset-bottom,0px))}.topbar{padding-top:env(safe-area-inset-top,0px);height:calc(58px + env(safe-area-inset-top,0px));font-size:12px}.topbar-right{font-size:11px}.topbar-right .status-dot{display:none}main{padding:23px 16px 0}.eyebrow{font-size:10px;letter-spacing:1.6px;margin-bottom:9px}.page-heading h1{font-size:23px;line-height:1.5}.page-heading p,.section-heading p{font-size:13px;line-height:1.8}.hero{min-height:0;padding:23px 20px}.hero-tag{font-size:10px;letter-spacing:1px}.hero h2{font-size:23px;letter-spacing:.5px;margin:15px 0 11px}.hero p{font-size:13px;line-height:1.9;margin-bottom:10px}.hero a{font-size:14px;min-height:44px;width:fit-content}.stats{gap:10px;margin:16px 0 26px}.stat{padding:16px 13px}.stat-label{font-size:13px}.stat-value{margin:12px 0;font-size:31px}.stat-value small{font-size:12px}.stat p{font-size:11px;line-height:1.7}.section-heading{gap:12px}.section-heading h2{font-size:19px}.section-heading>span{display:none}.mode-card{padding:18px 14px}.mode-card.chosen{padding:17.5px 13.5px}.mode-card h3{font-size:16px}.mode-card p{font-size:12px;line-height:1.8;min-height:44px;margin-bottom:12px}.mode-count{font-size:12px}.mode-count strong{font-size:14px}.mode-icon{width:42px;height:42px}.radio{width:20px;height:20px;right:13px;top:19px}.radio span{width:10px;height:10px}.primary,.secondary{min-height:48px;font-size:14px;padding:12px 18px}.nav-item{font-size:12px;min-height:54px}.nav-item svg{width:21px;height:21px}.start-panel{padding:18px 16px}.start-description{width:100%;gap:14px}.start-description b{font-size:15px}.start-description p{font-size:12px}.counts{display:grid;grid-template-columns:1fr auto 1fr;width:100%;gap:8px;font-size:13px}.counts label{display:flex;align-items:center;gap:4px;white-space:nowrap}.counts input{min-width:0;width:100%;max-width:80px;min-height:48px;font-size:16px;margin:0;padding:10px 6px}.tip{font-size:12px;line-height:1.8}.tip p{max-width:100%;width:100%}.resume{gap:12px}.resume span{font-size:13px}.resume small{font-size:12px;line-height:1.7}.resume button{font-size:13px;min-height:44px;flex-shrink:0}.quiz-heading{gap:6px;align-items:center;margin-bottom:16px}.quiz-heading .back{min-height:44px;font-size:13px}.quiz-heading>span{font-size:11px}.question-card{padding:20px 16px}.question-meta{font-size:13px}.type-tag{font-size:12px}.question-hint{font-size:13px;line-height:1.8}.question-stem{font-size:18px;line-height:1.9}.progress{margin:18px 0 23px}.option{min-height:60px;font-size:16px;line-height:1.8;padding:15px 12px;gap:12px}.option-key{width:32px;height:32px;min-width:32px;font-size:14px}.option>span:nth-child(2){min-width:0}.is-practicing main{padding-bottom:94px}.question-actions{position:fixed;bottom:calc(66px + env(safe-area-inset-bottom,0px));left:0;right:0;z-index:9;margin:0;padding:12px 16px;background:#fffffff5;border-top:1px solid #e1e6da;box-shadow:0 -5px 20px #263b3308;gap:12px}.question-actions .primary,.question-actions .secondary{font-size:14px;min-height:48px;padding:12px 15px}.question-actions .primary{flex:1}.question-actions .secondary{min-width:96px}.feedback{font-size:14px;padding:16px;line-height:1.9}.feedback small{font-size:12px}.feedback ul{padding-left:16px}.answer-sheet{padding:20px 16px}.answer-sheet h3{font-size:16px}.answer-sheet h3 span{font-size:13px}.answer-sheet .sheet-grid{grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:9px;max-height:320px;padding:3px}.sheet-grid button{font-size:13px;min-height:44px}.sheet-legend{font-size:12px;gap:20px}.answer-sheet>p{display:block;font-size:12px}.answer-sheet>.primary{display:none}.library-toolbar input,.library-toolbar select{font-size:16px;min-height:48px}.library-toolbar input{flex:1 1 160px}.library-toolbar select{flex:1 1 120px}.library-toolbar>span{font-size:12px}.library-list summary{font-size:15px;padding:18px 14px;gap:10px;align-items:flex-start}.library-list summary>svg{flex-shrink:0;margin-top:5px}.question-number{font-size:12px;margin-top:3px}.list-type{font-size:11px}.detail-body{font-size:14px;line-height:2}.detail-body p{align-items:flex-start}.detail-body svg{flex-shrink:0;margin-top:6px}.detail-answer small{font-size:12px}.empty{padding:40px 18px}.empty p{font-size:14px;line-height:1.9}.history-list h3{font-size:16px}.history-list p{font-size:12px;line-height:1.8}.history-score small{font-size:12px}.result-card>p,.result-numbers,.result-numbers span,.score span{font-size:14px}.result-actions .primary,.result-actions .secondary{width:100%}footer{font-size:11px;line-height:1.8;margin-top:26px}footer>span{flex-wrap:wrap}}@media(max-width:359px){.topbar{padding-left:16px;padding-right:16px}.topbar-right{font-size:0}.topbar-right .avatar{font-size:12px;margin-left:4px}.page-heading h1,.hero h2{font-size:21px}.hero{padding:20px 16px}.hero p br{display:none}.mode-card{padding:16px 12px}.mode-card.chosen{padding:15.5px 11.5px}.mode-card p{min-height:65px}.quiz-heading{flex-wrap:wrap}.quiz-heading>span{padding-bottom:6px}.result-numbers{gap:15px}}