// ==========================================
// 1. Teacher (老师)
// ==========================================
let ctxTeacher = getCtx('teacher');
if (ctxTeacher) {
const cx = 100, cy = 92;
// 黑板 (放大)
ctxTeacher.fillStyle = '#659E7A';
drawRoundedRect(ctxTeacher, cx - 70, cy - 52, 90, 58, 6); ctxTeacher.fill(); applyStroke(ctxTeacher);
ctxTeacher.fillStyle = '#FFFFFF'; ctxTeacher.font = '16px Arial';
ctxTeacher.fillText('A B', cx - 45, cy - 26); ctxTeacher.fillText('C', cx - 52, cy - 6);
// 身体/红衣服
ctxTeacher.fillStyle = '#C84439';
drawRoundedRect(ctxTeacher, cx - 28, cy + 12, 56, 48, 10); ctxTeacher.fill(); applyStroke(ctxTeacher);
// 头发后半部分
ctxTeacher.fillStyle = '#784832';
drawRoundedRect(ctxTeacher, cx - 30, cy - 14, 60, 54, 14); ctxTeacher.fill(); applyStroke(ctxTeacher);
drawFace(ctxTeacher, cx, cy);
// 刘海
ctxTeacher.fillStyle = '#784832';
ctxTeacher.beginPath(); ctxTeacher.arc(cx, cy - 6, 24, Math.PI, 0); ctxTeacher.fill(); applyStroke(ctxTeacher);
// 蓝皮书
ctxTeacher.fillStyle = '#2A4A8E';
drawRoundedRect(ctxTeacher, cx - 20, cy + 24, 40, 34, 3); ctxTeacher.fill(); applyStroke(ctxTeacher);
ctxTeacher.beginPath(); ctxTeacher.moveTo(cx, cy + 24); ctxTeacher.lineTo(cx, cy + 58); ctxTeacher.stroke();
drawLabel(ctxTeacher, 'teacher', '老师');
}