body.mobile-page{background:radial-gradient(circle at top,rgba(97,181,255,.16),transparent 34%),var(--bg-body)}.phone{background:linear-gradient(180deg,#eef5ff,#f5f7fa 18% 100%)}.top-header{padding:12px var(--mobile-padding) 10px;flex-shrink:0}.segment-wrapper{display:flex;justify-content:center}.segmented-control{display:inline-flex;gap:4px;padding:4px;border-radius:999px;background:#ffffffeb;box-shadow:0 10px 30px #2c56a014}.segment-btn{min-width:132px;height:38px;border:none;border-radius:999px;background:transparent;color:#7b8798;font-size:14px;font-weight:var(--fw-medium);cursor:pointer;transition:all var(--transition-base)}.segment-btn.active{background:linear-gradient(180deg,#fff,#f3f7fd);color:var(--text-primary);box-shadow:0 4px 10px #1e40af14}.filter-row{display:none;gap:8px;padding:0 var(--mobile-padding) 12px;overflow-x:auto;scrollbar-width:none}.filter-row::-webkit-scrollbar{display:none}.filter-row.active{display:flex}.filter-chip{display:inline-flex;align-items:center;gap:4px;flex-shrink:0;height:34px;padding:0 14px;border:1px solid rgba(207,217,230,.92);border-radius:999px;background:#fffffff0;color:#6d7788;font-size:13px;cursor:pointer}.filter-chip svg{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2}.mobile-content{padding-bottom:96px}.list-panel{display:none}.list-panel.active{display:block}.paper-list{padding-top:2px}.paper-card{background:#fffffff5;margin:0 var(--mobile-padding) 14px;border-radius:20px;padding:14px;border:1px solid rgba(233,238,245,.95);box-shadow:0 12px 32px #243c700f}.paper-card-head{display:flex;gap:14px;align-items:flex-start}.book-cover{width:88px;height:112px;border-radius:14px;position:relative;overflow:hidden;flex-shrink:0;background:linear-gradient(180deg,#fff,#f6fbff);border:1px solid rgba(223,232,243,.92);box-shadow:inset 0 1px #ffffffdb}.book-cover:before,.book-cover:after{content:"";position:absolute;pointer-events:none}.book-cover.math:before{inset:0 auto auto 0;width:100%;height:42px;background:linear-gradient(135deg,#fff 0 58%,#6ed7ff 58% 100%)}.book-cover.math:after{left:0;right:0;bottom:24px;height:34px;background:linear-gradient(135deg,transparent 0 16%,#2ec5f5 16% 100%)}.book-cover.school:before{inset:auto 0 0;height:54px;background:linear-gradient(180deg,#2abdd8,#36d0d0)}.book-cover.school:after{left:10px;right:10px;bottom:12px;height:28px;border-radius:18px 18px 8px 8px;border:2px solid rgba(255,255,255,.78);background:#ffffff2e}.cover-brand{position:absolute;left:8px;top:10px;font-size:8px;color:#4a6c7f;letter-spacing:.4px}.cover-main{position:absolute;top:34px;left:0;right:0;text-align:center;font-size:24px;font-weight:var(--fw-bold);color:#335173;letter-spacing:2px}.cover-sub{position:absolute;left:10px;right:10px;bottom:10px;text-align:center;font-size:9px;color:#fff;line-height:1.3;font-weight:var(--fw-medium)}.book-cover.math .cover-sub{color:#5e6d7f;bottom:8px}.paper-card-info{min-width:0;flex:1}.paper-card-title{font-size:16px;line-height:1.45;font-weight:var(--fw-bold);color:#1f2937}.paper-card-meta{margin-top:10px;display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:#838da0}.paper-card-meta strong{color:#30384a;margin-left:4px;font-weight:var(--fw-semibold)}.paper-tag-row{margin-top:10px;display:flex;gap:6px;flex-wrap:wrap}.paper-tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:8px;background:#f3f5f8;color:#6c7280;font-size:12px}.paper-tag.primary{background:#e9f2ff;color:var(--brand-primary)}.paper-actions{margin-top:16px;display:flex;gap:10px}.paper-btn{flex:1;height:40px;border:1px solid #e2e7ef;border-radius:999px;background:#fff;color:#7b8595;font-size:15px;font-weight:var(--fw-medium);display:inline-flex;align-items:center;justify-content:center;text-decoration:none;cursor:pointer}.paper-btn.primary{border-color:transparent;background:linear-gradient(180deg,#edf5ff,#e7f1ff);color:var(--brand-primary);font-weight:var(--fw-semibold)}.personal-list{padding-top:2px}.hw-card{background:var(--bg-card);margin:0 var(--mobile-padding) 12px;border-radius:16px;padding:16px;box-shadow:var(--shadow-sm)}.hw-card-head{display:flex;gap:12px;margin-bottom:12px;align-items:flex-start}.subject-box{flex-shrink:0;width:40px;height:48px;border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:var(--fw-bold);color:var(--text-primary);background:#fff;margin-top:2px}.hw-card-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.hw-card-title{font-size:15px;font-weight:var(--fw-semibold);color:var(--text-primary);line-height:1.4}.hw-card-subtitle{font-size:var(--font-xs);color:var(--text-muted)}.status-label{flex-shrink:0;padding:4px 10px;border:1px solid var(--border);border-radius:999px;font-size:11px;white-space:nowrap;margin-top:2px}.status-pending-submit{color:var(--text-secondary);border-color:var(--border);background:#fff}.status-pending-grade{color:var(--warning-text);border-color:#f59e0b4d;background:#fff8ed}.status-completed{color:var(--success-text);border-color:#22c55e38;background:#f0fbf4}.inner-detail-box{background:#f8f9fb;border-radius:12px;padding:12px;margin-bottom:14px;display:flex;flex-direction:column;gap:8px}.detail-row{display:flex;font-size:13px;line-height:1.4}.detail-label{width:65px;color:var(--text-secondary);flex-shrink:0}.detail-value{color:var(--text-primary)}.highlight-value{color:var(--brand-primary);font-weight:var(--fw-medium)}.card-actions{display:flex;align-items:center;border-top:1px dashed var(--border);padding-top:12px}.action-btn{flex:1;text-align:center;color:var(--brand-primary);font-size:15px;font-weight:var(--fw-medium);text-decoration:none}.action-divider{width:1px;height:16px;background:var(--border)}.floating-action-bar{position:absolute;left:0;right:0;bottom:80px;display:flex;gap:12px;padding:10px var(--mobile-padding);background:#fffffff5;box-shadow:0 -6px 20px #0f172a0f;z-index:12}.btn-outline{flex:1;height:42px;border:1px solid var(--brand-primary);color:var(--brand-primary);border-radius:999px;font-size:15px;cursor:pointer;background:transparent}.btn-solid{flex:1.5;height:42px;background:var(--brand-primary);color:var(--bg-card);border-radius:999px;font-size:15px;display:flex;align-items:center;justify-content:center;gap:6px;cursor:pointer;border:none}.btn-solid svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2}