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16px}.demo-input-wrap{flex-direction:column}.demo-input{width:100%}.footer-inner{flex-wrap:wrap;justify-content:center;font-size:12px}.app-page-inner{padding:calc(16px + var(--safe-top)) calc(14px + var(--safe-right)) calc(16px + var(--safe-bottom)) calc(14px + var(--safe-left))}.app-title{font-size:20px}.app-logo{font-size:28px}.app-upload-zone{padding:24px 16px}.app-upload-icon{font-size:30px}.app-test-thumb{width:60px;height:60px}.app-test-score{font-size:16px}.app-feedback-text{font-size:13px}.app-copy-text{font-size:13px;max-height:55vh}}@media (max-width: 375px){.hero-title{font-size:22px}.hero-stats{gap:10px;padding:14px 10px}.stat-num{font-size:18px}.stat-label{font-size:11px}.btn-lg{padding:12px 22px;font-size:14px}.feature-card{padding:16px}.feature-title{font-size:15px}.feature-desc{font-size:12px}}@media (orientation: landscape) and (max-height: 500px){.hero{min-height:auto;padding-top:calc(60px + var(--safe-top));padding-bottom:30px}.hero-stats{flex-direction:row}.stat-divider{width:1px;height:28px}}@media (hover: none){.btn-primary:hover{transform:none;box-shadow:0 4px 20px var(--primary-glow)}.btn-ghost:hover{border-color:var(--border-light);color:var(--text)}.feature-card:hover{transform:none;box-shadow:none;background:var(--bg-card)}.btn-primary:active{transform:scale(.97)}.btn-ghost:active{background:#ffffff0d}.feature-card:active,.app-batch-card:active{background:var(--bg-card-hover)}.app-upload-zone:active{border-color:var(--primary);background:#6366f10f}.app-copy-all-btn:active,.app-primary-btn:active{transform:scale(.98)}.app-action-btn:active{background:#ffffff1a}}.app-upload-primary{border-color:var(--primary);background:linear-gradient(135deg,#8b5cf60f,#ec48990a)}.app-upload-secondary{margin-top:10px;opacity:.7;transform:scale(.97)}.nb-back{background:none;border:none;color:var(--primary);font-size:15px;cursor:pointer;padding:4px 0}.nb-steps{display:flex;align-items:center;justify-content:center;gap:0;margin:20px 0}.nb-step{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1;position:relative}.nb-step:not(:last-child):after{content:"";position:absolute;top:14px;left:60%;width:80%;height:2px;background:var(--border)}.nb-step.done:not(:last-child):after{background:var(--primary)}.nb-step-dot{width:28px;height:28px;border-radius:50%;background:var(--border);color:var(--text-muted);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;z-index:1}.nb-step.active .nb-step-dot{background:var(--primary);color:#fff}.nb-step.done .nb-step-dot{background:var(--success);color:#fff}.nb-step-label{font-size:11px;color:var(--text-muted)}.nb-step.active .nb-step-label{color:var(--primary);font-weight:600}.nb-card{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);padding:20px;box-shadow:var(--shadow)}.nb-card-title{font-size:17px;font-weight:700;color:var(--text);margin-bottom:6px}.nb-card-desc{font-size:13px;color:var(--text-muted);margin-bottom:16px}.nb-analyzing{display:flex;flex-direction:column;align-items:center;gap:12px;padding:32px;color:var(--text-secondary);font-size:14px}.nb-spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.nb-paper-title{font-size:15px;font-weight:600;color:var(--primary);margin-bottom:14px;padding:8px 12px;background:var(--primary-glow);border-radius:var(--radius-sm)}.nb-questions{display:flex;flex-direction:column;gap:14px;margin-bottom:20px}.nb-question{border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;background:var(--bg-surface)}.nb-q-header{display:flex;align-items:center;gap:8px;margin-bottom:8px}.nb-q-num{font-weight:700;color:var(--primary);font-size:14px}.nb-q-type{font-size:11px;padding:2px 8px;border-radius:20px;background:var(--border);color:var(--text-muted)}.nb-q-score{font-size:12px;padding:2px 8px;border-radius:20px;background:#10b9811a;color:var(--success);margin-left:auto}.nb-q-content{font-size:13px;color:var(--text-secondary);margin-bottom:10px;line-height:1.5}.nb-q-answer-label{font-size:12px;color:var(--text-muted);margin-bottom:6px}.nb-q-answer-input{width:100%;min-height:60px;padding:10px 12px;border:1px solid var(--border-light);border-radius:10px;background:var(--bg-card);color:var(--text);font-size:14px;line-height:1.5;resize:vertical;font-family:inherit}.nb-q-answer-input:focus{outline:none;border-color:var(--primary)}.nb-confirm-btn{width:100%;padding:14px;border:none;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:16px;font-weight:600;cursor:pointer}.nb-confirm-btn:disabled{opacity:.6;cursor:not-allowed}