.stu{--stu-ink:#0d1524;--stu-ink-2:#3c4759;--stu-muted:#6b7688;--stu-line:#e6eaf1;--stu-bg:#f7f9fc;--stu-blue:#1657cf;--stu-blue-dark:#0f3fa0;--stu-blue-50:#eef3ff;--stu-green:#0f7a4d;--stu-green-50:#e9f7f0;--stu-amber-50:#fff6e6;--stu-amber:#96601a;--stu-radius:14px;--stu-shadow:0 1px 2px #0d15240a, 0 8px 24px #0d15240f;background:var(--stu-bg);color:var(--stu-ink);min-height:100vh;font-size:16px;line-height:1.55}.stu *,.stu :before,.stu :after{box-sizing:border-box}.stu-shell{grid-template-columns:248px minmax(0,1fr);gap:32px;max-width:1180px;margin:0 auto;padding:28px 24px 96px;display:grid}.stu-nav{flex-direction:column;align-self:start;align-items:flex-start;gap:4px;display:flex;position:sticky;top:24px}.stu-nav a{color:var(--stu-ink-2);text-align:left;border-radius:11px;justify-content:flex-start;align-items:center;gap:12px;padding:11px 14px;font-weight:500;text-decoration:none;display:flex}.stu-nav a:hover{background:#fff}.stu-nav a[aria-current=page]{background:var(--stu-blue-50);color:var(--stu-blue);font-weight:600}.stu-nav .ic{flex:0 0 17px;justify-content:center;align-items:center;font-size:17px;line-height:1;display:inline-flex}.stu-nav-label{min-width:0}.stu-account{border-top:1px solid var(--stu-line);margin-top:18px;padding-top:18px}.stu-account p{margin:0 0 2px;font-size:14px;font-weight:600}.stu-account span{color:var(--stu-muted);word-break:break-word;font-size:13px}.stu-tabbar{display:none}.stu-breadcrumbs{color:var(--stu-muted);flex-wrap:wrap;align-items:center;gap:7px;margin:0 0 12px;font-size:13px;display:flex}.stu-breadcrumbs a{color:var(--stu-blue);font-weight:600;text-decoration:none}.stu-breadcrumbs span:before{content:"/";color:var(--stu-line);margin-right:7px}.stu h1{letter-spacing:-.02em;margin:0 0 6px;font-size:27px;font-weight:700}.stu h2{margin:0 0 4px;font-size:19px;font-weight:700}.stu h3{margin:0;font-size:16px;font-weight:600}.stu .lede{color:var(--stu-muted);margin:0 0 24px}.stu-card{border:1px solid var(--stu-line);border-radius:var(--stu-radius);box-shadow:var(--stu-shadow);background:#fff;margin-bottom:18px;padding:22px}.stu-card>:last-child{margin-bottom:0}.stu-card-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.stu-progress{background:var(--stu-blue-50);border-radius:999px;height:10px;margin:14px 0 10px;overflow:hidden}.stu-progress i{background:var(--stu-blue);border-radius:999px;height:100%;transition:width .35s;display:block}.stu-next{background:var(--stu-blue-50);color:var(--stu-blue-dark);border-radius:12px;align-items:center;gap:10px;margin-bottom:16px;padding:14px 16px;font-weight:600;display:flex}.stu-btn{background:var(--stu-blue);color:#fff;min-height:46px;font:inherit;cursor:pointer;border:1px solid #0000;border-radius:11px;justify-content:center;align-items:center;gap:8px;padding:0 20px;font-weight:600;text-decoration:none;display:inline-flex}.stu-btn:hover:not(:disabled){background:var(--stu-blue-dark)}.stu-btn:disabled{opacity:.55;cursor:default}.stu-btn.ghost{border-color:var(--stu-line);color:var(--stu-ink-2);background:#fff}.stu-btn.ghost:hover:not(:disabled){background:var(--stu-bg);border-color:var(--stu-blue);color:var(--stu-blue)}.stu-btn.link{min-height:0;color:var(--stu-blue);background:0 0;border:0;padding:0;text-decoration:underline}.stu-actions{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.stu-field{flex-direction:column;gap:6px;margin-bottom:16px;display:flex}.stu-field label{color:var(--stu-ink-2);font-size:14px;font-weight:600}.stu-field .hint{color:var(--stu-muted);font-size:13px}.stu-field input,.stu-field select,.stu-field textarea{border:1px solid var(--stu-line);min-height:46px;font:inherit;color:var(--stu-ink);background:#fff;border-radius:11px;width:100%;padding:11px 13px}.stu-field textarea{resize:vertical;min-height:96px}.stu-field input:focus-visible,.stu-field select:focus-visible,.stu-field textarea:focus-visible,.stu-btn:focus-visible,.stu-nav a:focus-visible,.stu-breadcrumbs a:focus-visible{outline-offset:2px;outline:3px solid #1657cf59}.stu-field .err{color:#b42318;font-size:13px;font-weight:500}.stu-field input[aria-invalid=true],.stu-field select[aria-invalid=true]{border-color:#b42318}.stu-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px;display:grid}.stu-choice{min-height:46px;color:var(--stu-ink-2);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:9px;padding:0 2px;font-size:14.5px;font-weight:600;display:inline-flex}.stu-choice input[type=checkbox]{width:20px;height:20px;accent-color:var(--stu-blue);cursor:pointer;flex:none;margin:0}.stu-choice:focus-within{outline-offset:2px;border-radius:8px;outline:3px solid #1657cf59}.stu-alert{border-radius:11px;margin-bottom:16px;padding:13px 16px;font-size:14.5px}.stu-alert.error{color:#932018;background:#fdecea}.stu-alert.ok{background:var(--stu-green-50);color:var(--stu-green)}.stu-alert.info{background:var(--stu-amber-50);color:var(--stu-amber)}.stu-check{border-top:1px solid var(--stu-line);flex-wrap:wrap;align-items:center;gap:14px;padding:15px 0;display:flex}.stu-check:first-of-type{border-top:0}.stu-check .mark{border-radius:50%;flex:none;place-items:center;width:26px;height:26px;font-size:14px;display:grid}.stu-check .mark.done{background:var(--stu-green-50);color:var(--stu-green)}.stu-check .mark.todo{background:var(--stu-bg);color:var(--stu-muted);border:1px dashed var(--stu-line)}.stu-check .what{flex:1;min-width:160px}.stu-check .what small{color:var(--stu-muted);font-size:13px;display:block}.stu-check .do{flex-wrap:wrap;gap:8px;display:flex}.stu-timeline{margin:0;padding:0;list-style:none}.stu-timeline li{border-left:2px solid var(--stu-line);padding:0 0 18px 24px;position:relative}.stu-timeline li:last-child{border-left-color:#0000;padding-bottom:0}.stu-timeline li:before{content:"";background:var(--stu-blue);width:10px;height:10px;box-shadow:0 0 0 3px var(--stu-blue-50);border-radius:50%;position:absolute;top:4px;left:-6px}.stu-timeline li:last-child:before{background:var(--stu-blue-dark);box-shadow:0 0 0 4px var(--stu-blue-50)}.stu-timeline strong{color:var(--stu-ink);font-size:15px;font-weight:600;display:block}.stu-timeline span{color:var(--stu-muted);font-size:14px;display:block}.stu-list{margin:0 0 14px;padding:0;list-style:none}.stu-list li{border-top:1px solid var(--stu-line);padding:11px 0;font-size:15px}.stu-list li:first-child{border-top:0}.stu-steps{flex-wrap:wrap;gap:6px;margin-bottom:20px;display:flex}.stu-steps li{background:var(--stu-line);border-radius:999px;flex:1;min-width:44px;height:6px;list-style:none}.stu-steps li.on{background:var(--stu-blue)}.stu-steps li.done{background:#9dbcf5}.stu-step-label{letter-spacing:.06em;text-transform:uppercase;color:var(--stu-muted);margin-bottom:6px;font-size:13px;font-weight:600}.stu-row{border-top:1px solid var(--stu-line);flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:14px;padding:14px 0;display:flex}.stu-row:first-of-type{border-top:0}.stu-row .meta{color:var(--stu-muted);font-size:14px}.stu-empty{color:var(--stu-muted);padding:6px 0 2px;font-size:14.5px}.stu-empty a{color:var(--stu-blue);font-weight:600;text-decoration:underline}.stu-empty a:hover{color:var(--stu-blue-dark)}.stu-empty a:focus-visible{outline-offset:2px;border-radius:4px;outline:3px solid #1657cf59}.stu-auth{place-items:center;min-height:100vh;padding:40px 20px;display:grid}.stu-auth-card{border:1px solid var(--stu-line);width:100%;max-width:420px;box-shadow:var(--stu-shadow);background:#fff;border-radius:18px;padding:30px 26px}.stu-auth-card h1{font-size:24px}.stu-auth-foot{border-top:1px solid var(--stu-line);color:var(--stu-muted);text-align:center;margin-top:20px;padding-top:18px;font-size:14.5px}.stu-auth-foot a{color:var(--stu-blue);font-weight:600}@media (max-width:900px){.stu-shell{grid-template-columns:minmax(0,1fr);gap:0;padding:20px 16px 92px}.stu-nav{display:none}.stu-tabbar{z-index:40;border-top:1px solid var(--stu-line);padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));background:#fff;align-items:stretch;display:flex;position:fixed;bottom:0;left:0;right:0}.stu-tabbar a{text-align:center;min-width:0;min-height:54px;color:var(--stu-muted);border-radius:10px;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2px;padding:6px 2px;font-size:11.5px;font-weight:600;line-height:1.25;text-decoration:none;display:flex}.stu-tabbar a[aria-current=page]{color:var(--stu-blue);background:var(--stu-blue-50)}.stu-tabbar .ic{font-size:18px}.stu-grid{grid-template-columns:minmax(0,1fr)}.stu h1{font-size:23px}}