:root{--primary: #4f46e5;--primary-dark: #4338ca;--primary-soft: #eef2ff;--bg: #f5f6fa;--card: #ffffff;--text: #1e2233;--muted: #6b7280;--line: #e5e7eb;--danger: #dc2626;--ok: #16a34a;--warn: #d97706;--radius: 14px;--shadow: 0 1px 3px rgba(30, 34, 51, .08), 0 4px 16px rgba(30, 34, 51, .05)}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent}button{font-family:inherit;cursor:pointer;border:none;background:none}input,select,textarea{font-family:inherit;font-size:15px}.app{min-height:100%}.content{padding:16px 16px calc(76px + env(safe-area-inset-bottom));max-width:760px;margin:0 auto}.topbar{position:sticky;top:0;z-index:30;background:linear-gradient(135deg,#4f46e5,#6d28d9);color:#fff;padding:14px 16px;display:flex;align-items:center;justify-content:space-between}.topbar h1{font-size:18px;font-weight:600;letter-spacing:.5px}.topbar .sub{font-size:12px;opacity:.85;margin-top:2px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:40;display:flex;background:var(--card);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.bottom-nav button{flex:1;padding:8px 0 6px;display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--muted);font-size:11px}.bottom-nav button .ico{font-size:20px;line-height:1}.bottom-nav button.active{color:var(--primary);font-weight:600}@media (min-width: 900px){.app{display:grid;grid-template-columns:220px 1fr}.topbar{grid-column:1 / -1;padding:20px 28px}.content{grid-column:2;max-width:900px;padding:24px 32px}.bottom-nav{position:static;flex-direction:column;grid-row:2 / span 2;border-top:none;border-right:1px solid var(--line);padding:16px 8px;gap:4px;align-self:start;min-height:calc(100vh - 70px)}.bottom-nav button{flex-direction:row;justify-content:flex-start;gap:12px;padding:12px 16px;border-radius:10px;font-size:15px}.bottom-nav button .ico{font-size:18px}.bottom-nav button.active{background:var(--primary-soft)}}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:14px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:10px;font-size:15px;font-weight:500;background:var(--primary);color:#fff;transition:filter .15s}.btn:hover{filter:brightness(1.08)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.ghost{background:var(--primary-soft);color:var(--primary)}.btn.plain{background:#f3f4f6;color:var(--text)}.btn.danger{background:#fef2f2;color:var(--danger)}.btn.lg{padding:14px 22px;font-size:16px;border-radius:12px}.btn.block{width:100%}.field{margin-bottom:14px}.field>label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:500}.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;outline:none}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary)}.field textarea{resize:vertical;min-height:70px}.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.chip{display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;font-size:13px;background:#f3f4f6;color:var(--text);border:1px solid transparent;margin:0 6px 6px 0;-webkit-user-select:none;user-select:none}.chip.on{background:var(--primary-soft);color:var(--primary);border-color:var(--primary);font-weight:600}.chip.mini{padding:2px 8px;font-size:12px;margin:0 4px 4px 0}.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}.badge.s0{background:#fee2e2;color:var(--danger)}.badge.s1{background:#fef3c7;color:var(--warn)}.badge.s2{background:#dcfce7;color:var(--ok)}.badge.subject{background:var(--primary-soft);color:var(--primary)}.section-title{font-size:15px;font-weight:600;margin:4px 0 12px;display:flex;align-items:center;gap:8px}.pick-zone{border:2px dashed #c7d2fe;border-radius:var(--radius);padding:36px 16px;text-align:center;background:#fafaff}.pick-zone .big{font-size:42px}.pick-zone p{color:var(--muted);font-size:13px;margin-top:8px}.pick-btns{display:flex;gap:12px;justify-content:center;margin-top:16px;flex-wrap:wrap}.editor-stage{background:#111827;border-radius:var(--radius);overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:240px}.editor-stage canvas{max-width:100%;max-height:60vh;touch-action:none}.editor-tools{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.editor-tip{font-size:12px;color:var(--muted);margin-top:8px}.kp-groups .group-head{display:flex;justify-content:space-between;align-items:center;padding:9px 4px;font-size:14px;font-weight:600;color:var(--text);border-bottom:1px solid var(--line);cursor:pointer}.kp-groups .group-body{padding:10px 2px}.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.filters select,.filters input{padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:#fff;outline:none}.filters input{flex:1;min-width:140px}.q-card{display:flex;gap:12px;cursor:pointer}.q-card img{width:86px;height:86px;object-fit:cover;border-radius:10px;flex-shrink:0;background:#f3f4f6}.q-card .info{flex:1;min-width:0}.q-card .meta{font-size:12px;color:var(--muted);margin-top:4px}.q-card .tags{margin-top:6px;overflow:hidden;max-height:24px}.empty{text-align:center;color:var(--muted);padding:40px 0;font-size:14px}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background:#11182780;display:flex;align-items:flex-end;justify-content:center}.modal{background:var(--card);width:100%;max-width:760px;max-height:92vh;border-radius:18px 18px 0 0;overflow-y:auto;padding:18px 16px calc(18px + env(safe-area-inset-bottom))}@media (min-width: 900px){.modal-mask{align-items:center}.modal{border-radius:18px}}.modal h3{font-size:16px;margin-bottom:12px}.modal img.full{width:100%;border-radius:10px;background:#f3f4f6}.modal-actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.practice-progress{height:6px;background:#e5e7eb;border-radius:999px;overflow:hidden;margin-bottom:14px}.practice-progress .bar{height:100%;background:var(--primary);border-radius:999px;transition:width .25s}.practice-actions{display:flex;gap:12px;margin-top:16px}.practice-actions .btn{flex:1;padding:14px;font-size:16px}.big-stat{text-align:center;padding:18px 0 8px}.big-stat .num{font-size:44px;font-weight:700;color:var(--primary)}.big-stat .lbl{color:var(--muted);font-size:13px;margin-top:4px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:14px}.stat-grid .cell{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;text-align:center}.stat-grid .num{font-size:26px;font-weight:700;color:var(--primary)}.stat-grid .lbl{font-size:12px;color:var(--muted);margin-top:3px}.bar-row{display:flex;align-items:center;gap:10px;padding:7px 0;font-size:13px}.bar-row .name{width:130px;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bar-row .track{flex:1;height:8px;background:#f3f4f6;border-radius:999px;overflow:hidden}.bar-row .fill{height:100%;border-radius:999px;background:linear-gradient(90deg,#818cf8,#4f46e5)}.bar-row .val{width:76px;text-align:right;color:var(--muted);flex-shrink:0;font-variant-numeric:tabular-nums}.toast{position:fixed;top:70px;left:50%;transform:translate(-50%);background:#111827e6;color:#fff;padding:10px 20px;border-radius:999px;font-size:14px;z-index:100;animation:fadein .2s}@keyframes fadein{0%{opacity:0;transform:translate(-50%,-6px)}}.icp{text-align:center;padding:18px 0 26px;font-size:12px}.icp a{color:var(--muted);text-decoration:none}.icp a:hover{color:var(--primary)}