:root{--green:#1f3a34;--gold:#9a7b3f;--ink:#26332f;--muted:#697570;--line:#dce3de;--paper:#f5f2ea;--red:#aa3635;--white:#fff;--surface:#f5f7f5}
*{box-sizing:border-box;letter-spacing:0}body{margin:0;background:#fafbf9;color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:var(--green)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #b3c9be;outline-offset:3px}button{border:1px solid var(--line);background:#fff;color:var(--green);border-radius:6px;padding:10px 16px;min-height:44px;line-height:1.45;font-weight:600}button:hover{background:#eef3ee}button.primary{background:var(--green);color:#fff;border-color:var(--green)}button.primary:hover{background:#294d44}button.quiet{border-color:transparent;background:transparent}button.danger{color:var(--red)}svg{width:20px;height:20px;flex-shrink:0;vertical-align:middle}.icon-button{padding:10px;width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center}.site-header{height:76px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 max(24px,calc((100vw - 1280px)/2));border-bottom:1px solid var(--line);background:#fff}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--green);white-space:nowrap}.brand-mark{background:var(--green);color:white;width:36px;height:36px;border-radius:6px;display:grid;place-items:center}.brand-divider{border-left:1px solid #cbd3cd;margin-left:16px;padding-left:16px;font-size:16px;font-weight:500}#identity{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}#app{max-width:1280px;margin:auto;padding:28px 24px 48px}h1{font-size:26px;line-height:1.4;margin:0 0 8px}h2{font-size:20px;margin:0 0 16px}h3{font-size:16px;margin:0 0 8px}p{margin:0 0 16px}.muted{color:var(--muted);font-size:14px}.gold{color:var(--gold)}.heading-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}.tabs{display:flex;gap:24px;border-bottom:1px solid var(--line);margin-bottom:24px}.tabs button{border:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;padding:12px 2px;display:flex;align-items:center;gap:8px;color:var(--muted)}.tabs button.active{color:var(--green);border-bottom-color:var(--gold)}.filters{display:flex;align-items:center;flex-wrap:wrap;gap:16px;margin-bottom:22px}.filters label{display:flex;align-items:center;gap:10px;margin:0}.filters select{max-width:340px}.check{font-size:14px}.check input{width:18px;height:18px;accent-color:var(--green)}.progress{margin-left:auto;color:var(--muted);font-size:14px}.workspace{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(320px,1fr);gap:32px;align-items:start}.viewer{min-width:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}.viewer-head{height:52px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px;border-bottom:1px solid var(--line);font-size:14px}.work-code{font-weight:700;font-variant-numeric:tabular-nums}.image-stage{height:clamp(340px,54vh,600px);overflow:hidden;position:relative;touch-action:none;background:#fff}.image-transform{width:100%;height:100%;display:flex;align-items:center;justify-content:center;transform-origin:50% 50%}.image-transform img{width:100%;height:100%;object-fit:contain;user-select:none;-webkit-user-drag:none}.viewer-tools{display:flex;align-items:center;justify-content:center;gap:6px;padding:8px;border-top:1px solid var(--line);background:#fafbf9}.viewer-tools button{border-color:transparent;background:transparent}.viewer-tools .divider{width:1px;height:24px;background:var(--line);margin:0 8px}.viewer.fullscreen{position:fixed;inset:12px;z-index:50;display:flex;flex-direction:column;box-shadow:0 0 0 30px #fff}.viewer.fullscreen .image-stage{height:auto;flex:1}.answer-pane{min-width:0;padding-top:4px}.section-label{font-size:13px;color:var(--gold);font-weight:600;margin-bottom:6px}.answer-pane h2{font-size:22px}.score-area{padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:24px 0}.score-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.score-input{display:flex;align-items:center;gap:10px}.score-input input{width:88px;font-size:24px;text-align:center;font-weight:700;padding:4px 6px}.score-range{width:100%;height:36px;accent-color:var(--green)}.range-labels{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}.actions{display:flex;gap:10px;flex-wrap:wrap}.actions button{flex:1}.stack{display:grid;gap:14px}.field{display:grid;gap:6px;margin-bottom:16px;font-size:14px;font-weight:500}input:not([type=checkbox]):not([type=range]),select,textarea{width:100%;min-height:44px;border:1px solid #cbd5ce;border-radius:6px;background:#fff;padding:10px 12px;color:var(--ink)}textarea{min-height:140px;resize:vertical;line-height:1.7}.field input[type=checkbox]{justify-self:start}.login-layout{max-width:900px;margin:64px auto;display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}.login-aside{border-left:3px solid var(--gold);padding:8px 0 8px 28px}.login-aside h1{font-size:32px;line-height:1.5;color:var(--green);margin-bottom:16px}.login-aside p{color:var(--muted)}.login-form{max-width:380px;width:100%}.login-form button{width:100%;margin-top:12px}.login-form h2{margin-bottom:26px}.error{color:var(--red);font-size:14px;white-space:pre-wrap;margin:10px 0}.empty{padding:64px 16px;text-align:center;color:var(--muted)}.empty h2{color:var(--ink)}.empty .actions{justify-content:center;margin:24px auto;max-width:360px}.result{padding-top:8px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:18px 0;border-block:1px solid var(--line);margin-bottom:22px}.stat small{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.stat strong{font-size:26px;line-height:1.2;font-variant-numeric:tabular-nums}.status-note{background:#edf4ef;color:#315b41;padding:10px 12px;margin-bottom:16px;font-size:14px;border-radius:4px}.prose{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.8;margin-bottom:24px}.reference{border-left:3px solid var(--gold);padding-left:16px}.ai-area{border-top:1px solid var(--line);padding-top:20px;margin-top:24px}.ai-area h3{display:flex;align-items:center;gap:8px}.ai-entry{padding:12px 0;border-bottom:1px solid var(--line)}.ai-entry .question{font-weight:600;font-size:14px}.ai-entry p{margin:6px 0}.ai-area .field{margin-top:16px}.ai-area textarea{min-height:80px}.table-wrap{overflow:auto;border-top:1px solid var(--line)}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--surface);font-weight:600;color:var(--muted)}td{overflow-wrap:anywhere}td .prose{max-width:460px;max-height:180px;overflow:auto;margin:0}td button{min-height:36px;padding:6px 12px}.pagination{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:24px;font-size:14px}.account-form{max-width:440px}.saved{font-size:13px;color:var(--muted);min-height:24px;margin:8px 0}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--green);color:#fff;padding:12px 20px;max-width:calc(100vw - 32px);border-radius:6px;z-index:100;display:none;box-shadow:0 4px 16px #0002}.admin-shell{max-width:1280px;margin:auto;padding:28px 24px}.admin-shell .tabs{overflow:auto}.admin-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}.admin-toolbar input{max-width:240px}.editor{width:min(700px,calc(100vw - 24px));max-height:90vh;border:1px solid var(--line);border-radius:8px;padding:24px}.editor::backdrop{background:#10282088}.editor-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.editor-head h2{margin:0}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.form-grid .wide{grid-column:1/-1}.badge{font-size:12px;padding:3px 8px;border-radius:4px;background:#eaf2ed;color:#345a45;white-space:nowrap}.badge.draft{background:#f5f0e4;color:#886829}.record-items{display:none}.nowrap{white-space:nowrap}.preview-image{max-width:100%;max-height:320px;object-fit:contain;display:block;margin:0 auto 16px}
.filters label{white-space:nowrap}.filters select{width:320px}.score-input #score{width:88px;font-size:24px;padding:6px;text-align:center}
@media(max-width:900px){.workspace{gap:22px;grid-template-columns:minmax(0,1fr) minmax(290px,.85fr)}.site-header{padding:0 20px}.brand-divider{margin-left:10px;padding-left:10px}}
@media(max-width:680px){.site-header{height:64px;padding:0 16px}.brand{font-size:18px;gap:8px}.brand-divider{font-size:14px}.brand-mark{width:30px;height:30px}.brand-mark svg{width:18px}#identity .learner-name{display:none}#app,.admin-shell{padding:20px 16px 32px}h1{font-size:23px}.heading-row{margin-bottom:16px}.heading-row .muted{max-width:130px;text-align:right}.tabs{gap:20px;margin-bottom:20px}.tabs button{font-size:14px;white-space:nowrap;gap:6px}.tabs svg{width:17px}.filters{gap:12px}.filters label:first-child{width:100%;display:grid;grid-template-columns:48px minmax(0,1fr)}.filters select{max-width:none;min-width:0}.progress{font-size:12px}.workspace{grid-template-columns:1fr;gap:24px}.image-stage{height:360px}.viewer-head{height:44px;padding:0 12px}.viewer-tools{padding:4px}.answer-pane h2{font-size:20px}.score-area{margin:18px 0;padding:18px 0}.actions{gap:8px}.actions button{font-size:14px;padding:12px 10px}.login-layout{margin:24px auto;grid-template-columns:1fr;gap:28px;max-width:420px}.login-aside{padding-left:20px}.login-aside h1{font-size:26px;margin-bottom:8px}.login-aside p{font-size:14px;margin:0}.login-form{max-width:none}.login-form h2{font-size:20px;margin-bottom:18px}.result-stats{gap:8px}.stat strong{font-size:24px}.form-grid{grid-template-columns:1fr}.table-wrap.learner-records{display:none}.record-items{display:grid;gap:12px}.record-item{border:1px solid var(--line);border-radius:6px;background:#fff;padding:16px}.record-item .row{display:flex;align-items:center;justify-content:space-between;gap:12px}.record-item p{margin:8px 0;font-size:14px}.editor{padding:18px}.admin-toolbar{flex-wrap:wrap}}
@media(max-width:680px){.filters select{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}