:root{--sea: #16324F;--sea-2: #24496E;--light: #F2B630;--paper: #FAFBFC;--mist: #E6ECF2;--line: #D3DCE6;--ink: #1C2430;--muted: #5E6B7A;--alert: #C2412D;--ok: #2E7D4F;--mine: #DCEBFA;--r: 10px;--nav-h: 60px;color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}a{color:var(--sea-2)}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--light);outline-offset:2px}.app{display:grid;grid-template-rows:auto 1fr auto;height:100%}.topbar{background:var(--sea);color:#fff;display:flex;align-items:center;gap:12px;padding:calc(env(safe-area-inset-top) + 10px) 16px 10px}.topbar h1{font-size:18px;font-weight:600;margin:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar .back{background:none;border:0;color:#fff;font-size:22px;padding:0 6px 0 0;cursor:pointer}.topbar .mark{width:28px;height:28px;border-radius:6px}.main{overflow-y:auto;-webkit-overflow-scrolling:touch}.page{max-width:760px;margin:0 auto;padding:16px}.nav{display:flex;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 2px;color:var(--muted);text-decoration:none;font-size:11px;position:relative}.nav a svg{width:24px;height:24px}.nav a.active{color:var(--sea)}.nav a.active:before{content:"";position:absolute;top:0;left:30%;right:30%;height:3px;background:var(--light);border-radius:0 0 3px 3px}.nav .dot{position:absolute;top:4px;right:calc(50% - 20px);background:var(--alert);color:#fff;font-size:10px;border-radius:9px;padding:0 5px;min-width:16px;text-align:center}@media (min-width: 900px){.app{grid-template-columns:220px 1fr;grid-template-rows:auto 1fr}.topbar{grid-column:1 / -1}.nav{grid-row:2;flex-direction:column;border-top:0;border-right:1px solid var(--line);padding-top:8px}.nav a{flex:0;flex-direction:row;gap:12px;padding:12px 20px;font-size:15px}.nav a.active:before{top:20%;bottom:20%;left:0;right:auto;width:3px;height:auto;border-radius:0 3px 3px 0}.nav .dot{position:static;margin-left:auto}}h2{font-size:20px;margin:4px 0 12px}h3{font-size:16px;margin:20px 0 8px;color:var(--sea)}.muted{color:var(--muted)}.small{font-size:13px}.err{color:var(--alert);margin:8px 0}.okmsg{color:var(--ok);margin:8px 0}.btn{background:var(--sea);color:#fff;border:0;border-radius:var(--r);padding:11px 18px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px}.btn:disabled{opacity:.55;cursor:default}.btn.light{background:var(--light);color:var(--ink)}.btn.ghost{background:transparent;color:var(--sea);border:1px solid var(--line)}.btn.danger{background:transparent;color:var(--alert);border:1px solid #ecc5bd}.btn.sm{padding:6px 10px;font-size:14px;font-weight:500}.btn.block{width:100%}.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.grow{flex:1}label.f{display:block;margin:10px 0}label.f>span{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}input[type=text],input[type=email],input[type=password],input[type=date],input[type=time],input[type=datetime-local],input[type=tel],select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:var(--r);background:#fff}textarea{resize:vertical;min-height:70px}.list{list-style:none;margin:0;padding:0}.item{padding:12px 0;border-bottom:1px solid var(--mist)}.item:last-child{border-bottom:0}.tag{display:inline-block;font-size:12px;padding:2px 8px;border-radius:10px;background:var(--mist);color:var(--sea)}.tabs{display:flex;gap:6px;overflow-x:auto;margin-bottom:12px;padding-bottom:2px}.tabs button{border:1px solid var(--line);background:#fff;padding:6px 12px;border-radius:16px;white-space:nowrap;cursor:pointer}.tabs button.on{background:var(--sea);color:#fff;border-color:var(--sea)}.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px;margin-bottom:14px}.empty{text-align:center;color:var(--muted);padding:40px 16px}.auth{min-height:100%;display:grid;place-items:center;padding:24px 16px;background:linear-gradient(180deg,var(--sea) 0 38%,var(--paper) 38%)}.auth .card{width:100%;max-width:400px;background:#fff;border-radius:14px;padding:24px;box-shadow:0 10px 30px #16324f2e}.auth .logo{display:flex;align-items:center;gap:12px;margin-bottom:18px}.auth .logo img{width:48px;height:48px;border-radius:10px}.auth .logo b{font-size:20px;display:block}.qr{display:block;margin:8px auto;width:180px;height:180px}.code{font-family:ui-monospace,Menlo,monospace;background:var(--mist);padding:2px 6px;border-radius:4px;word-break:break-all}.chatlist a{display:flex;gap:12px;padding:12px 16px;text-decoration:none;color:inherit;border-bottom:1px solid var(--mist);align-items:center}.chatlist a:hover{background:#fff}.avatar{width:44px;height:44px;border-radius:50%;background:var(--sea-2);color:#fff;display:grid;place-items:center;font-weight:600;flex:none}.avatar.school{background:var(--light);color:var(--sea)}.avatar.class{background:var(--sea)}.avatar.group{background:#4f6d7a}.chatlist .t{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chatlist .p{color:var(--muted);font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chatlist .meta{margin-left:auto;text-align:right;font-size:12px;color:var(--muted);flex:none}.badge{display:inline-block;background:var(--sea);color:#fff;border-radius:10px;padding:1px 7px;font-size:12px;margin-top:4px}.chat{display:flex;flex-direction:column;height:100%}.msgs{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:6px;background:var(--mist)}.msg{max-width:82%;background:#fff;border-radius:12px;padding:8px 10px;align-self:flex-start;position:relative;box-shadow:0 1px #0000000d}.msg.mine{align-self:flex-end;background:var(--mine)}.msg .a{font-size:13px;font-weight:600;color:var(--sea-2);margin-bottom:2px}.msg .x{white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere}.msg .tm{font-size:11px;color:var(--muted);text-align:right;margin-top:2px}.msg.deleted .x{color:var(--muted);font-style:italic}.msg img.att,.msg video.att{display:block;max-width:100%;max-height:320px;border-radius:8px;margin:4px 0;background:#000}.msg .fileatt{display:flex;gap:8px;align-items:center;padding:6px 8px;background:#16324f0f;border-radius:8px;margin:4px 0;text-decoration:none;color:inherit}.msg .menu{position:absolute;top:4px;right:4px;background:none;border:0;color:var(--muted);cursor:pointer;font-size:16px;padding:0 4px;opacity:.6}.day{align-self:center;font-size:12px;color:var(--muted);background:#ffffffb3;padding:2px 10px;border-radius:10px;margin:6px 0}.composer{display:flex;gap:8px;padding:8px;border-top:1px solid var(--line);background:#fff;align-items:flex-end;padding-bottom:calc(8px + env(safe-area-inset-bottom))}.composer textarea{min-height:42px;max-height:140px;border-radius:21px;padding:10px 14px}.composer .icon{width:42px;height:42px;border-radius:50%;border:0;background:var(--mist);color:var(--sea);cursor:pointer;flex:none;display:grid;place-items:center}.composer .send{background:var(--sea);color:#fff}.pending{display:flex;gap:6px;flex-wrap:wrap;padding:6px 8px 0;background:#fff}.pending span{background:var(--mist);border-radius:8px;padding:4px 8px;font-size:13px}.tbl{width:100%;border-collapse:collapse;font-size:14px}.tbl th,.tbl td{border-bottom:1px solid var(--mist);padding:8px 6px;text-align:left;vertical-align:top}.tbl th{color:var(--muted);font-weight:500;font-size:13px}.grade{display:inline-grid;place-items:center;min-width:32px;height:32px;padding:0 6px;border-radius:8px;background:var(--mist);font-weight:700;color:var(--sea)}.lesson{display:grid;grid-template-columns:64px 1fr;gap:10px;padding:10px 0;border-bottom:1px solid var(--mist)}.lesson .tt{font-variant-numeric:tabular-nums;color:var(--muted);font-size:14px}.consent-tbl td:nth-child(2){white-space:nowrap}.consent-tbl input[type=text]{padding:6px 8px;font-size:14px}.hint{background:#fff6df;border:1px solid #F3DDA0;border-radius:var(--r);padding:12px;font-size:14px;margin:12px 0}.auth .card.wide{max-width:680px}.main,.chat{min-height:0}.subtabs{display:flex;gap:4px;background:#fff;border-bottom:1px solid var(--line);padding:0 12px;overflow-x:auto;position:sticky;top:0;z-index:2}.subtabs a{padding:12px 10px 10px;text-decoration:none;color:var(--muted);white-space:nowrap;border-bottom:3px solid transparent}.subtabs a.active{color:var(--sea);border-bottom-color:var(--light);font-weight:600}.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:6px;margin:8px 0}.gallery a,.gallery video{display:block;aspect-ratio:1;border-radius:8px;overflow:hidden;background:#000}.gallery img,.gallery video{width:100%;height:100%;object-fit:cover;display:block}.avatar.parents{background:#3e7c6a}