:root{--bg: #f4f5f7;--surface: #ffffff;--surface-2: #fafafa;--border: #e6e8eb;--border-strong: #d5d8dd;--text: #16181d;--text-2: #5f636b;--text-3: #9aa0a8;--primary: #3f5bd9;--primary-soft: #eef1fd;--danger: #d94848;--danger-soft: #fdeeee;--warn: #c07b12;--warn-soft: #fdf3e2;--ok: #17916b;--ok-soft: #e8f6f1;--radius: 12px;--radius-sm: 8px;--shadow: 0 1px 2px rgba(16, 24, 40, .05);--nav-h: 58px;--safe-b: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,sans-serif;font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}input,select,textarea,button{font-family:inherit;font-size:inherit}a{color:var(--primary);text-decoration:none}h1,h2,h3,h4{margin:0;font-weight:600}p{margin:0}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--border)}.topbar-title{font-size:16px;font-weight:600}.topbar-sub{font-size:12px;color:var(--text-3);margin-top:1px}.page{flex:1;padding:14px 14px calc(var(--nav-h) + var(--safe-b) + 16px);max-width:1180px;width:100%;margin:0 auto}.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;background:var(--surface);border-top:1px solid var(--border);padding-bottom:var(--safe-b)}.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:var(--nav-h);font-size:11px;color:var(--text-3);position:relative;text-align:center}.bottom-nav a.active{color:var(--primary)}.nav-ico{width:20px;height:20px;display:block}.nav-dot{position:absolute;top:6px;left:50%;margin-left:4px;min-width:15px;height:15px;padding:0 4px;border-radius:8px;background:var(--danger);color:#fff;font-size:10px;line-height:15px;font-weight:600}.sidebar{display:none}@media (min-width: 900px){.app-shell{flex-direction:row}.sidebar{display:flex;flex-direction:column;gap:4px;width:208px;flex-shrink:0;padding:16px 12px;background:var(--surface);border-right:1px solid var(--border);position:sticky;top:0;height:100vh}.sidebar .brand{padding:8px 10px 18px}.sidebar a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--text-2);font-size:14px;position:relative}.sidebar a.active{background:var(--primary-soft);color:var(--primary);font-weight:500}.sidebar .nav-dot{position:static;margin-left:auto}.bottom-nav{display:none}.main-col{flex:1;min-width:0;display:flex;flex-direction:column}.page{padding:20px 24px 40px}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}.card+.card{margin-top:10px}.card-title{font-size:15px;font-weight:600;margin-bottom:4px}.section-title{font-size:13px;color:var(--text-3);font-weight:500;margin:18px 2px 8px;display:flex;align-items:center;justify-content:space-between}.section-title:first-child{margin-top:0}.grid{display:grid;gap:10px}@media (min-width: 700px){.grid-2{grid-template-columns:repeat(2,1fr)}}@media (min-width: 1050px){.grid-3{grid-template-columns:repeat(3,1fr)}}.field{margin-bottom:12px}.label{display:block;font-size:13px;color:var(--text-2);margin-bottom:5px}.label .req{color:var(--danger);margin-left:2px}.input,.select,.textarea{width:100%;padding:10px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s}.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #3f5bd91f}.input:disabled,.select:disabled{background:var(--surface-2);color:var(--text-3)}.textarea{min-height:74px;resize:vertical}.select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%239aa0a8' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}.hint{font-size:12px;color:var(--text-3);margin-top:5px;line-height:1.5}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 16px;border:1px solid transparent;border-radius:var(--radius-sm);background:var(--primary);color:#fff;font-weight:500;cursor:pointer;transition:opacity .15s,background .15s}.btn:active{opacity:.8}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-block{width:100%}.btn-ghost{background:var(--surface);color:var(--text-2);border-color:var(--border-strong)}.btn-danger{background:var(--danger)}.btn-ok{background:var(--ok)}.btn-sm{padding:6px 11px;font-size:13px;border-radius:7px}.btn-link{background:none;border:none;color:var(--primary);padding:4px 2px;cursor:pointer;font-size:13px}.row-actions{display:flex;flex-wrap:wrap;gap:6px}.tag{display:inline-flex;align-items:center;padding:2px 8px;border-radius:20px;font-size:12px;background:var(--surface-2);color:var(--text-2);border:1px solid var(--border)}.tag-primary{background:var(--primary-soft);color:var(--primary);border-color:transparent}.tag-danger{background:var(--danger-soft);color:var(--danger);border-color:transparent}.tag-warn{background:var(--warn-soft);color:var(--warn);border-color:transparent}.tag-ok{background:var(--ok-soft);color:var(--ok);border-color:transparent}.tag-price{background:var(--gold-soft, #fff7e6);color:var(--gold, #b8860b);border-color:transparent}.tabs{display:flex;gap:6px;background:var(--surface);padding:4px;border-radius:10px;border:1px solid var(--border);margin-bottom:12px;overflow-x:auto}.tabs button{flex:1;white-space:nowrap;padding:8px 12px;border:none;background:none;border-radius:7px;color:var(--text-2);cursor:pointer;font-size:14px}.tabs button.on{background:var(--primary);color:#fff;font-weight:500}.stu{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:13px 14px;box-shadow:var(--shadow)}.stu.low{border-color:#f2c9c9;background:#fffbfb}.stu-main{flex:1;min-width:0}.stu-name{font-size:15px;font-weight:600}.stu.low .stu-name,.stu.low .stu-hours{color:var(--danger)}.stu-meta{display:flex;flex-wrap:wrap;gap:5px;margin-top:6px}.stu-remark{font-size:13px;color:var(--text-2);margin-top:7px;word-break:break-word}.stu-hours{font-size:20px;font-weight:600;line-height:1.1;text-align:right;white-space:nowrap}.stu-hours small{font-size:12px;font-weight:400;color:var(--text-3);margin-left:1px}.stu-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px}.stu-foot{display:flex;justify-content:flex-end;gap:6px;margin-top:10px;padding-top:10px;border-top:1px dashed var(--border);flex-wrap:wrap}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:13px 14px}.stat-v{font-size:24px;font-weight:600;line-height:1.2}.stat-l{font-size:12px;color:var(--text-3);margin-top:3px}.stat.alert .stat-v{color:var(--danger)}.stats-row{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}@media (min-width: 700px){.stats-row{grid-template-columns:repeat(4,1fr)}}.mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#10182873;z-index:100;display:flex;align-items:flex-end;justify-content:center;padding:0}.modal{background:var(--surface);width:100%;max-height:90vh;overflow-y:auto;border-radius:16px 16px 0 0;padding:18px 16px calc(18px + var(--safe-b));animation:slideUp .2s ease}@keyframes slideUp{0%{transform:translateY(24px);opacity:.6}to{transform:none;opacity:1}}@media (min-width: 640px){.mask{align-items:center;padding:20px}.modal{max-width:520px;border-radius:var(--radius);animation:none}}.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.modal-head h3{font-size:16px}.modal-foot{display:flex;gap:8px;margin-top:16px}.modal-foot .btn{flex:1}.toast-wrap{position:fixed;top:14px;left:0;right:0;z-index:200;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none;padding:0 14px}.toast{max-width:480px;padding:10px 16px;border-radius:10px;font-size:14px;background:#23262d;color:#fff;box-shadow:0 6px 20px #1018282e;animation:fadeIn .18s ease}.toast.err{background:var(--danger)}.toast.ok{background:var(--ok)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}.empty{text-align:center;padding:44px 16px;color:var(--text-3);font-size:14px}.loading{text-align:center;padding:30px;color:var(--text-3);font-size:14px}.picker{position:relative}.picker-pop{position:absolute;left:0;right:0;top:calc(100% + 4px);z-index:20;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm);box-shadow:0 8px 24px #1018281f;max-height:240px;overflow-y:auto}.picker-item{padding:10px 12px;cursor:pointer;border-bottom:1px solid var(--surface-2)}.picker-item:last-child{border-bottom:none}.picker-item:hover,.picker-item.on{background:var(--primary-soft)}.picker-item .n{font-weight:500}.picker-item .m{font-size:12px;color:var(--text-3);margin-top:2px}.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;background:var(--bg)}.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:26px 22px;box-shadow:0 4px 24px #1018280f}.auth-title{font-size:20px;font-weight:600;text-align:center}.auth-sub{font-size:13px;color:var(--text-3);text-align:center;margin:6px 0 22px}.role-switch{display:flex;gap:8px;margin-bottom:18px}.role-switch button{flex:1;padding:12px 8px;border-radius:10px;border:1px solid var(--border-strong);background:var(--surface);color:var(--text-2);cursor:pointer;font-size:14px}.role-switch button.on{border-color:var(--primary);background:var(--primary-soft);color:var(--primary);font-weight:600}.divider{display:flex;align-items:center;gap:10px;margin:18px 0;color:var(--text-3);font-size:12px}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border)}.notice{padding:10px 12px;border-radius:var(--radius-sm);font-size:13px;line-height:1.6;margin-bottom:12px}.notice-info{background:var(--primary-soft);color:#2c40a0}.notice-warn{background:var(--warn-soft);color:var(--warn)}.notice-danger{background:var(--danger-soft);color:var(--danger)}.kv{display:flex;justify-content:space-between;gap:12px;padding:7px 0;font-size:14px;border-bottom:1px solid var(--surface-2)}.kv:last-child{border-bottom:none}.kv .k{color:var(--text-3);flex-shrink:0}.kv .v{text-align:right;word-break:break-all}.item-line{display:flex;gap:8px;align-items:center;margin-bottom:8px}.item-line .picker{flex:1;min-width:0}.item-line .hr-input{width:92px;flex-shrink:0}.icon-btn{border:1px solid var(--border-strong);background:var(--surface);border-radius:var(--radius-sm);width:38px;height:38px;flex-shrink:0;cursor:pointer;color:var(--text-3);font-size:18px;line-height:1}