.collect-homework-shell{display:grid;gap:16px}.collect-tabs{display:flex;justify-content:center;justify-self:center;width:100%;margin-bottom:24px}.collect-tab{padding:8px 24px;font-size:14px;color:var(--text-secondary);cursor:pointer;border:1px solid var(--border);background:#fff;transition:all .2s ease;user-select:none}.collect-tab:first-child{border-radius:4px 0 0 4px}.collect-tab:last-child{border-radius:0 4px 4px 0}.collect-tab+.collect-tab{border-left:none}.collect-tab.active{color:var(--brand-primary);border-color:var(--brand-primary);background:var(--brand-primary-light);font-weight:500}.collect-tab:hover:not(.active){color:var(--brand-primary)}.collect-panel{display:block}.scanner-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.scanner-select{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--text-primary);cursor:pointer}.scanner-actions{display:flex;gap:8px}.btn-icon{width:32px;height:32px;border:1px solid var(--border-light);border-radius:6px;background:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease}.btn-icon:hover{border-color:var(--brand-primary)}.scanner-hero{background:linear-gradient(135deg,#b3d4ff,#d9e8ff 40%,#c8d8f0);border-radius:var(--radius-md);padding:48px 20px;text-align:center;margin-bottom:20px;position:relative}.scanner-device-wrap{position:relative;display:inline-block;margin-bottom:16px}.scanner-device-icon{width:72px;height:72px;background:#ffffff80;border-radius:50%;display:flex;align-items:center;justify-content:center}.scanner-error-badge{position:absolute;bottom:-2px;right:-6px;width:24px;height:24px;background:#fff;border:2px solid #ef4444;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#ef4444;font-size:14px;font-weight:700}.collect-table-wrap{background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden}.empty-row{text-align:center;color:var(--text-muted);padding:40px 0}.photo-collect-guide{background:#fff;border-radius:var(--radius-lg);padding:40px 48px;text-align:center;min-height:500px}.guide-title{color:var(--brand-primary);font-size:22px;font-weight:600;margin-bottom:36px}.guide-content{display:flex;gap:64px;justify-content:center;align-items:flex-start;text-align:left}.guide-left{max-width:300px}.guide-step-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.guide-step-desc{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:20px}.phone-mockup{margin-bottom:16px}.phone-frame{width:230px;border:2px solid #e0e0e0;border-radius:24px;overflow:hidden;box-shadow:0 4px 24px #00000014;background:#fff}.phone-statusbar{display:flex;justify-content:space-between;align-items:center;padding:6px 16px 4px;font-size:12px;font-weight:500}.phone-header-bar{padding:8px 16px;text-align:center;border-bottom:1px solid #f0f0f0}.phone-tab-bar{display:flex;padding:0 12px;border-bottom:1px solid #f0f0f0}.phone-tab-bar span{flex:1;text-align:center;padding:8px 0;font-size:12px;color:var(--text-muted)}.phone-tab-active{color:var(--brand-primary)!important;font-weight:600;border-bottom:2px solid var(--brand-primary)}.phone-hw-list{padding:8px 12px}.phone-hw-card{border:1px solid #f0f0f0;border-radius:8px;padding:10px;margin-bottom:8px;font-size:11px}.phone-hw-card-header{display:flex;align-items:center;gap:6px;margin-bottom:4px}.phone-hw-check{color:var(--success);font-size:10px;font-weight:700}.phone-hw-subject{padding:1px 6px;border-radius:3px;font-size:10px;font-weight:500}.phone-hw-subject.math{background:#dbeafe;color:#2563eb}.phone-hw-subject.chinese{background:#fce7f3;color:#db2777}.phone-hw-book{font-size:12px;font-weight:500;color:var(--text-primary)}.phone-hw-card-meta{font-size:10px;color:var(--text-muted);margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.phone-hw-card-footer{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--text-muted)}.phone-tag-done{padding:2px 8px;background:#dbeafe;color:#2563eb;border-radius:4px;font-size:10px}.phone-bottom-actions{display:flex;gap:8px;padding:10px 12px 16px;justify-content:center}.phone-btn-outline{padding:6px 16px;border:1px solid var(--border);border-radius:20px;background:#fff;font-size:11px;color:var(--text-secondary);cursor:pointer}.phone-btn-primary{padding:6px 16px;border:none;border-radius:20px;background:var(--brand-primary);color:#fff;font-size:11px;font-weight:500;cursor:pointer}.guide-btn-callout{display:flex;gap:12px;justify-content:center;padding:12px;border:2px dashed #ccc;border-radius:8px}.callout-btn-outline{padding:6px 16px;border:1px solid var(--border);border-radius:20px;font-size:12px;color:var(--text-secondary)}.callout-btn-primary{padding:6px 16px;border-radius:20px;background:var(--brand-primary);color:#fff;font-size:12px;font-weight:500}.guide-right{max-width:380px;text-align:center}.guide-right-title{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.guide-right-desc{font-size:13px;color:var(--text-secondary);line-height:1.8;margin-bottom:24px}.platform-tabs{display:flex;justify-content:center;gap:0;margin-bottom:24px}.platform-tab{padding:8px 24px;font-size:14px;color:var(--text-secondary);cursor:pointer;border-bottom:2px solid transparent;transition:all .2s ease}.platform-tab.active{color:var(--text-primary);font-weight:600;border-bottom-color:var(--brand-primary)}.platform-tab:hover:not(.active){color:var(--text-primary)}.qrcode-area{display:flex;justify-content:center;margin-bottom:20px}.qrcode-box{text-align:center}.qrcode-label{margin-top:8px}.guide-footnote{font-size:12px;color:var(--text-muted);line-height:1.8}@media(max-width:1200px){.photo-collect-guide{padding:32px 28px}.guide-content{gap:36px}}@media(max-width:960px){.guide-content{flex-direction:column;align-items:center;text-align:center}.guide-left,.guide-right{max-width:100%}.guide-step-desc{text-align:center}}