
:root{--bg:#f5f6f2;--card:#fff;--ink:#263e38;--muted:#6f7f79;--green:#24564b;--light:#eaf1eb;--line:#e3e8e1;--gold:#a17330;--goldbg:#fcf3df;--red:#a0493e;--redbg:#fbece7;--radius:19px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:14px;line-height:1.6}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0}button:disabled{opacity:.42;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:3px solid #b3c9bc;outline-offset:3px}button{transition:background .15s,transform .15s}button:active{transform:translateY(1px)}a{color:var(--green)}h1,h2,h3,h4,p{margin-top:0}h1{font-size:32px;line-height:1.4;font-weight:650;letter-spacing:-1px}h2{font-size:20px;line-height:1.5;font-weight:650}h3{font-size:16px;font-weight:650}p{margin-bottom:12px}svg.icon{width:21px;height:21px;flex-shrink:0;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.layout{min-height:100vh;display:grid;grid-template-columns:222px 1fr}.sidebar{position:sticky;top:0;height:100vh;background:#fff;padding:35px 22px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column}.brand{display:flex;gap:11px;align-items:center;padding:0 9px;margin-bottom:42px}.brand-mark{width:41px;height:45px;background:var(--green);color:white;border-radius:12px;display:grid;place-items:center;position:relative;font-family:Georgia,serif;font-size:27px}.brand-mark small{font-family:inherit;font-size:9px;position:absolute;left:6px;top:1px}.brand-name{font-size:19px;font-weight:700;letter-spacing:2px}.brand-caption{color:var(--muted);font-size:9px;letter-spacing:1px;white-space:nowrap}.nav-label{font-size:10px;letter-spacing:2px;color:#919c97;padding:0 14px;margin-bottom:12px}.nav{display:grid;gap:7px}.nav button{padding:13px 14px;border-radius:11px;display:flex;gap:12px;align-items:center;background:none;color:var(--muted);text-align:left;font-weight:500}.nav button.active{background:var(--light);color:var(--green);font-weight:650}.sidebar-bottom{margin-top:auto;padding-top:24px}.privacy-note{background:#f7f8f5;padding:15px;border-radius:14px;font-size:12px;color:var(--muted);margin-top:14px}.main{min-width:0;padding:0 46px 44px;max-width:1530px;width:100%;margin:auto}.topbar{height:88px;display:flex;align-items:center;justify-content:space-between;gap:12px}.breadcrumb{font-size:13px;color:var(--muted)}.top-actions{display:flex;align-items:center;gap:10px}.badge{display:inline-flex;gap:6px;align-items:center;font-size:11px;font-weight:500;padding:5px 10px;border-radius:7px;background:var(--light);color:var(--green);white-space:normal}.badge.amber{background:var(--goldbg);color:var(--gold)}.badge.red{background:var(--redbg);color:var(--red)}.badge.gray{background:#f0f2ef;color:var(--muted)}.dot{width:6px;height:6px;background:currentColor;border-radius:50%}.btn{padding:11px 17px;border-radius:10px;font-weight:550;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;min-height:43px;background:var(--green);color:white}.btn:hover{background:#193f37}.btn.secondary{background:white;color:var(--green);border:1px solid var(--line)}.btn.secondary:hover{background:#f4f7f3}.btn.soft{background:var(--light);color:var(--green)}.btn.small{font-size:12px;min-height:35px;padding:7px 12px}.btn.ghost{background:transparent;color:var(--muted)}.btn.danger{background:var(--redbg);color:var(--red)}.link-button{color:var(--green);background:none;font-weight:550;padding:4px 0;display:inline-flex;gap:7px;align-items:center}.hero{background:#e9f0e8;border-radius:25px;min-height:225px;padding:32px 36px;display:grid;grid-template-columns:1fr 265px;gap:24px;overflow:hidden;position:relative}.eyebrow{font-size:10px;font-weight:650;letter-spacing:2px;text-transform:uppercase;color:var(--green);margin-bottom:12px}.hero h1{margin-bottom:12px}.hero p{color:#61776d;max-width:540px}.hero .btn{margin-top:9px}.formula-art{display:flex;align-items:center;justify-content:center;position:relative;min-height:180px}.formula-card{background:#fffef9;border:1px solid #dbe4d7;padding:25px 20px;transform:rotate(-7deg);box-shadow:0 15px 30px #2b543212;border-radius:17px;width:215px;z-index:1}.formula-card .tiny{font-size:10px;color:#859084;letter-spacing:2px}.formula-card .formula{font-family:Georgia,serif;font-size:22px;white-space:nowrap;margin:14px 0 7px;color:#345a43}.formula-card .line{height:5px;background:#e7ecdf;border-radius:3px;margin:8px 0;width:80%}.check-circle{position:absolute;bottom:5px;right:2px;border-radius:50%;border:5px solid #e9f0e8;color:#fff;background:#74927c;width:50px;height:50px;display:grid;place-items:center;z-index:2}.orbit{position:absolute;border:1px solid #cfddcc;border-radius:50%;width:260px;height:120px;transform:rotate(-30deg)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:20px 0 27px}.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;display:flex;justify-content:space-between;gap:12px;align-items:center}.stat-value{font-size:29px;font-weight:650;letter-spacing:-.8px}.stat .icon-box{background:#f4f6f0;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#71866b}.muted{color:var(--muted)}.smalltext{font-size:12px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px}.section-head h2{margin:0}.two-col{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(260px,1fr);gap:24px}.card{padding:24px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);min-width:0}.task{display:flex;gap:15px;align-items:center;border-top:1px solid var(--line);padding:18px 0}.task:first-child{border-top:0;padding-top:0}.task:last-child{padding-bottom:0}.task-number{font-family:Georgia,serif;width:38px;height:44px;border-radius:10px;background:#f5f5ee;display:grid;place-items:center;font-size:18px;color:#8b987b;flex-shrink:0}.task-main{flex:1;min-width:0}.task-title{margin-bottom:4px;font-weight:600;line-height:1.65}.task-meta{font-size:11px;color:var(--muted)}.task-action{background:#f3f6f1;color:var(--green);border-radius:50%;width:32px;height:32px;display:grid;place-items:center;flex-shrink:0}.path-step{display:flex;gap:13px;margin-bottom:21px}.path-step:last-child{margin-bottom:0}.path-num{width:25px;height:25px;border:1px solid #d6e0d2;border-radius:50%;display:grid;place-items:center;font-size:11px;flex-shrink:0;color:#73856e}.path-step p{margin:3px 0 0;font-size:12px;color:var(--muted)}.bottom-note{font-size:12px;color:var(--muted);margin:24px 0 0;display:flex;align-items:center;gap:7px}.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:20px;flex-wrap:wrap}.search{flex:1;min-width:180px}input:not([type=checkbox]):not([type=radio]):not([type=file]),select,textarea{width:100%;padding:12px 13px;border:1px solid #dce3d9;border-radius:10px;background:#fff;color:var(--ink);outline:0}textarea{resize:vertical;min-height:92px;line-height:1.7}input:focus,textarea:focus,select:focus{border-color:#8baa96;box-shadow:0 0 0 3px #eaf1eb}label.field{display:block;margin-bottom:18px;font-size:12px;font-weight:600}label.field>input,label.field>select,label.field>textarea{margin-top:7px;font-weight:400;font-size:14px}.checklabel{display:flex;gap:10px;align-items:flex-start;font-size:12px;font-weight:400;margin:12px 0}.checklabel input{accent-color:var(--green);margin-top:5px;flex-shrink:0}.question-list{display:grid;gap:14px}.question-card{padding:23px 25px;background:white;border:1px solid var(--line);border-radius:var(--radius);display:flex;gap:20px}.question-content{min-width:0;flex:1}.question-content h3{margin:9px 0}.tagrow{display:flex;flex-wrap:wrap;gap:6px}.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:var(--muted);font-size:13px}.empty{text-align:center;padding:48px 24px;background:white;border:1px dashed #cddacc;border-radius:var(--radius)}.empty .icon{width:42px;height:42px;color:#9aaf98;margin-bottom:14px}.empty h2{font-size:19px;margin-bottom:6px}.empty p{color:var(--muted)}.notice{padding:13px 16px;border-radius:12px;background:var(--goldbg);color:#87642f;font-size:12px;margin:15px 0;line-height:1.8}.notice.green{background:var(--light);color:var(--green)}.notice.red{background:var(--redbg);color:var(--red)}.notice strong{font-weight:650}.page-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin:14px 0 22px}.page-heading h1{font-size:27px;margin-bottom:7px}.page-heading p{color:var(--muted);margin-bottom:0}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin-bottom:22px}.step-btn{padding:14px 9px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--muted);font-size:12px}.step-btn.active{background:var(--green);color:white;border-color:var(--green)}.step-btn span{margin-right:8px;opacity:.65}.detail-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(260px,.8fr);gap:23px}.text-block{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.95}.work-block{background:#f7f6f1;border-left:3px solid #d4c9a7;padding:16px 18px;border-radius:0 10px 10px 0;font-family:inherit}.history-item{padding:13px 0;border-bottom:1px solid var(--line);font-size:12px}.history-item:last-child{border-bottom:0}.history-item small{display:block;color:var(--muted);margin-top:3px}.progress-track{height:5px;background:#e9ede7;border-radius:5px;overflow:hidden;margin:12px 0}.progress-fill{height:100%;background:#8da68b;max-width:100%}.hypothesis{margin:18px 0;padding:20px;border:1px solid var(--line);border-radius:13px}.hypothesis h3{margin:10px 0}.evidence{font-size:12px;color:var(--muted);background:#f7f8f5;padding:12px;border-radius:8px;margin:12px 0}.options{display:grid;gap:9px;margin-top:15px}.option{display:flex;align-items:center;text-align:left;gap:12px;padding:12px 15px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}.option strong{display:grid;place-items:center;width:27px;height:27px;border-radius:7px;background:#f4f6f0;font-size:12px;flex-shrink:0}.option.selected{border-color:#749780;background:#edf4ee}.option.correct{border-color:#80a38a;background:#eaf4ec}.option.wrong{border-color:#d7a79c;background:#fcf0eb}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.lesson-step{display:flex;gap:15px;border-top:1px solid var(--line);padding:18px 0}.lesson-step strong{font-family:Georgia,serif;font-size:20px;color:#90a084}.level-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.level-tabs button{padding:9px 13px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--muted);font-size:12px}.level-tabs button.active{background:var(--light);color:var(--green);border-color:#bbcebd}.split{display:grid;grid-template-columns:1fr 1fr;gap:17px}.img-thumb{max-width:100%;max-height:230px;object-fit:contain;border-radius:9px;border:1px solid var(--line);display:block;background:#f6f6f3}.img-row{display:flex;gap:12px;overflow:auto;margin:15px 0}.img-item{min-width:120px;max-width:220px;position:relative}.img-item img{width:100%;height:140px;object-fit:contain;background:#f6f7f3;border:1px solid var(--line);border-radius:10px}.img-item button{margin-top:4px}.upload-area{border:1px dashed #a7bdab;border-radius:15px;background:#f7faf5;padding:25px;text-align:center}.upload-area .icon{width:33px;height:33px;color:#779576;margin-bottom:8px}.upload-area p{font-size:12px;color:var(--muted);margin:7px 0 15px}.knowledge-list{display:grid;gap:15px}.knowledge-card{padding:23px;border:1px solid var(--line);background:#fff;border-radius:var(--radius)}.knowledge-meta{display:flex;gap:17px;font-size:12px;color:var(--muted);margin-top:10px;flex-wrap:wrap}.exam-layout{display:grid;grid-template-columns:300px 1fr;gap:22px;align-items:start}.exam-controls{position:sticky;top:18px}.paper{padding:34px;background:white;border:1px solid var(--line);border-radius:13px}.paper h2{text-align:center;font-family:"Noto Serif CJK SC",serif;font-size:23px;margin-bottom:7px}.paper-meta{text-align:center;color:var(--muted);font-size:11px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:22px}.paper-question{margin-bottom:27px;break-inside:avoid;font-size:13px}.answer-space{height:80px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 29px,#edf0eb 30px,transparent 31px);margin-top:8px}.answer-key{break-before:page;padding-top:25px;border-top:1px dashed var(--line)}.modal-overlay{position:fixed;inset:0;background:#18372d55;backdrop-filter:blur(4px);z-index:50;padding:32px 18px;display:flex;justify-content:center;align-items:flex-start;overflow:auto}.modal{width:100%;max-width:780px;border-radius:21px;background:#fff;box-shadow:0 25px 90px #102f3520;max-height:calc(100dvh - 64px);overflow:auto}.modal.small-modal{max-width:560px}.modal-head{display:flex;justify-content:space-between;align-items:center;padding:23px 26px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:1;border-radius:21px 21px 0 0}.modal-head h2{margin:0;font-size:19px}.modal-body{padding:25px 26px}.modal-foot{border-top:1px solid var(--line);padding:18px 26px;display:flex;justify-content:flex-end;gap:10px}.close-btn{background:#f3f5f0;border-radius:50%;width:30px;height:30px;color:var(--muted)}.toast{position:fixed;bottom:27px;left:50%;transform:translateX(-50%);padding:13px 20px;background:#263e38;color:white;border-radius:11px;box-shadow:0 8px 30px #122a2720;z-index:100;font-size:13px;max-width:90vw}.busy{position:fixed;inset:0;background:#ffffffca;backdrop-filter:blur(2px);display:grid;place-items:center;z-index:99;text-align:center;padding:20px}.spinner{width:30px;height:30px;border:3px solid #dce5db;border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 18px}@keyframes spin{to{transform:rotate(360deg)}}.mobile-brand,.mobile-nav{display:none}.space{height:10px}.number-circle{width:30px;height:30px;background:var(--light);border-radius:9px;display:grid;place-items:center;flex-shrink:0;color:var(--green)}details{border:1px solid var(--line);padding:14px;border-radius:10px;margin-top:12px}summary{cursor:pointer;font-size:12px;color:var(--muted)}[hidden]{display:none!important}.privacy-foot{font-size:11px;color:var(--muted);margin-top:14px}.radio-row{display:flex;gap:8px;align-items:flex-start;margin:10px 0;font-size:13px}.radio-row input{accent-color:var(--green);margin-top:5px}.record-photo{max-width:100%;margin:10px 0;border-radius:9px;max-height:400px;object-fit:contain}
@media(min-width:1500px){.hero{min-height:260px}.hero h1{font-size:38px}.main{padding-left:55px;padding-right:55px}.two-col{gap:28px}}@media(max-width:1100px){.layout{grid-template-columns:185px 1fr}.sidebar{padding-left:13px;padding-right:13px}.main{padding:0 25px 35px}.hero{padding:28px;grid-template-columns:1fr 170px}.formula-card{width:160px;padding:22px 14px}.formula-card .formula{font-size:20px}.orbit{width:200px}.two-col{grid-template-columns:1fr}.detail-grid{grid-template-columns:1fr}.detail-aside{order:2}.exam-layout{grid-template-columns:250px 1fr}.brand{padding:0}.stat{padding:16px}}@media(max-width:720px){body{font-size:14px}.layout{display:block}.sidebar{display:none}.main{padding:0 18px 100px}.topbar{height:75px;gap:5px}.breadcrumb{display:none}.mobile-brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:650}.mobile-brand .brand-mark{width:28px;height:32px;border-radius:8px;font-size:21px}.mobile-brand .brand-mark small{font-size:7px}.top-actions{gap:6px}.top-actions .btn{font-size:11px;padding:7px 9px;min-height:32px}.badge{font-size:10px;padding:4px 7px}.hero{padding:25px 24px;grid-template-columns:1fr;min-height:0;border-radius:21px}.hero h1{font-size:28px;line-height:1.5}.hero p{font-size:12px;line-height:1.8}.formula-art{display:none}.eyebrow{font-size:9px;margin-bottom:9px}.hero .btn{font-size:13px}.stats{gap:8px;margin-top:15px;margin-bottom:25px}.stat{padding:13px 12px;display:block;border-radius:13px}.stat-value{font-size:25px}.stat .icon-box{display:none}.stat .smalltext{font-size:10px}.stat .stat-label{font-size:11px}.two-col{gap:20px}.card{padding:20px}.section-head h2{font-size:18px}.section-head .link-button{font-size:12px}.task{gap:10px;padding:16px 0}.task-title{font-size:13px}.task-number{width:30px;height:36px;font-size:15px}.task-meta{font-size:10px}.page-heading h1{font-size:25px}.page-heading .btn{font-size:12px;padding:9px 12px;white-space:nowrap}.page-heading p{font-size:12px}.question-card{padding:20px;gap:12px}.question-card>.task-number{display:none}.question-card .actions .btn{font-size:12px}.steps{gap:4px}.step-btn{font-size:10px;padding:12px 5px}.step-btn span{display:block;margin:0 0 2px;font-size:13px}.split{grid-template-columns:1fr;gap:0}.exam-layout{display:block}.exam-controls{position:static;margin-bottom:18px}.paper{padding:25px 20px}.paper h2{font-size:20px}.modal-overlay{padding:12px 9px;align-items:flex-start}.modal{border-radius:17px;max-height:calc(100dvh - 24px)}.modal-head{padding:18px 19px}.modal-body{padding:21px 19px}.modal-foot{padding:15px 19px}.toolbar select{max-width:130px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:15;border-top:1px solid var(--line);background:#ffffffef;backdrop-filter:blur(15px);padding:8px 3px calc(8px + env(safe-area-inset-bottom));justify-content:space-around}.mobile-nav button{display:flex;flex-direction:column;align-items:center;gap:3px;background:none;color:#8a9690;font-size:10px;padding:4px 11px}.mobile-nav button.active{color:var(--green)}.mobile-nav .icon{width:21px;height:21px}.bottom-note{font-size:10px;align-items:flex-start}.actions .btn{flex-grow:1}.level-tabs button{padding:8px 10px;font-size:11px}.toast{bottom:85px;min-width:250px}.notice{font-size:11px}.privacy-foot{font-size:10px}.detail-grid{gap:15px}}
@media print{@page{size:A4;margin:15mm}body{background:white;color:#111;font-size:12pt}.sidebar,.topbar,.mobile-nav,.no-print,.modal-overlay,.toast,.busy,.bottom-note{display:none!important}.layout,.main,.exam-layout{display:block!important;margin:0!important;padding:0!important;max-width:none!important}.paper{padding:0!important;border:0!important;border-radius:0!important}.paper-meta{color:#555}.paper-question{break-inside:avoid}.paper img{max-height:250px}.answer-key{break-before:page}.page-heading{display:none}.paper h2{color:black}.paper .badge{border:1px solid #aaa;color:#333;background:white}.print-warn{font-size:9pt}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.auth-wrap{min-height:100dvh;display:grid;grid-template-columns:minmax(260px,1fr) minmax(320px,1fr);max-width:1160px;margin:auto;padding:60px 40px;gap:80px;align-items:center}.auth-art h1{font-size:42px;letter-spacing:-1px}.auth-art .brand{margin-bottom:65px}.auth-art p{max-width:360px;color:var(--muted);font-size:15px}.auth-panel{background:white;padding:35px;border:1px solid var(--line);border-radius:24px}.auth-panel h2{font-size:24px;margin:0 0 8px}.auth-panel .btn.primary{width:100%;margin-top:12px}.auth-tabs{display:flex;gap:8px;margin:25px 0}.auth-tabs button{flex:1;padding:10px 7px;border-radius:9px;background:#f2f5f0;color:var(--muted);font-size:12px}.auth-tabs button.active{background:var(--light);color:var(--green);font-weight:600}.form-error{white-space:pre-wrap;color:var(--red);font-size:13px;min-height:24px}.admin-main{max-width:1160px;margin:auto;padding:30px 26px 70px}.admin-header{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:20px}.model-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.model-card h2{margin-bottom:5px}.model-card .field{margin-bottom:12px}.model-card .actions{margin-top:12px}.test-results{display:grid;gap:8px;margin-top:18px}.test-row{border:1px solid var(--line);border-radius:9px;padding:12px;font-size:12px}.account-row{display:flex;align-items:center;gap:15px;flex-wrap:wrap;padding:15px 0;border-bottom:1px solid var(--line)}.account-row>div:first-child{flex:1;min-width:130px}.account-row .actions{margin:0}.token-output{overflow-wrap:anywhere;white-space:pre-wrap;background:var(--goldbg);padding:16px;border-radius:12px;margin-top:15px}.camera-layer{position:fixed;inset:0;z-index:80;background:#10251ffa;display:flex;align-items:center;justify-content:center;padding:15px}.camera-panel{width:100%;max-width:780px;background:#fff;border-radius:20px;overflow:auto;max-height:95dvh;padding:22px}.camera-panel video,.camera-panel .captured{width:100%;max-height:57dvh;object-fit:contain;background:#152d27;border-radius:12px;display:block}.camera-panel .camera-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.camera-panel h2{margin:0}.camera-message{font-size:13px;white-space:pre-wrap;margin:15px 0;color:var(--muted)}.camera-panel .actions{margin-top:12px}.auth-footer{font-size:11px;color:var(--muted);margin:24px 0 0;line-height:1.8}.status-line{min-height:25px;color:var(--muted);font-size:12px}.model-help{font-size:11px;line-height:1.7;color:var(--muted)}
@media(max-width:800px){.auth-wrap{display:block;padding:30px 18px}.auth-art .brand{margin-bottom:25px}.auth-art h1{font-size:28px}.auth-art>p{font-size:13px;margin-bottom:20px}.auth-panel{padding:25px 22px}.model-grid{grid-template-columns:1fr}.admin-main{padding:20px 15px 45px}.admin-header{align-items:flex-start}.admin-header h1{font-size:26px}.camera-panel{padding:17px}.camera-panel video,.camera-panel .captured{max-height:50dvh}.top-actions .badge{max-width:110px}.top-actions{gap:3px}.top-actions .btn{padding:7px 6px}.mobile-brand{font-size:14px}}